forked from OSchip/llvm-project
6866 lines
244 KiB
C++
6866 lines
244 KiB
C++
//===-- lib/Semantics/resolve-names.cpp -----------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#include "resolve-names.h"
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#include "assignment.h"
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#include "check-omp-structure.h"
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#include "mod-file.h"
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#include "program-tree.h"
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#include "resolve-names-utils.h"
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#include "rewrite-parse-tree.h"
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#include "flang/Common/Fortran.h"
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#include "flang/Common/default-kinds.h"
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#include "flang/Common/indirection.h"
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#include "flang/Common/restorer.h"
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#include "flang/Evaluate/characteristics.h"
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#include "flang/Evaluate/common.h"
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#include "flang/Evaluate/fold.h"
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#include "flang/Evaluate/intrinsics.h"
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#include "flang/Evaluate/tools.h"
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#include "flang/Evaluate/type.h"
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#include "flang/Parser/parse-tree-visitor.h"
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#include "flang/Parser/parse-tree.h"
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#include "flang/Parser/tools.h"
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#include "flang/Semantics/attr.h"
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#include "flang/Semantics/expression.h"
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#include "flang/Semantics/scope.h"
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#include "flang/Semantics/semantics.h"
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#include "flang/Semantics/symbol.h"
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#include "flang/Semantics/tools.h"
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#include "flang/Semantics/type.h"
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#include "llvm/Support/raw_ostream.h"
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#include <list>
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#include <map>
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#include <set>
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#include <stack>
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namespace Fortran::semantics {
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using namespace parser::literals;
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template <typename T> using Indirection = common::Indirection<T>;
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using Message = parser::Message;
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using Messages = parser::Messages;
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using MessageFixedText = parser::MessageFixedText;
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using MessageFormattedText = parser::MessageFormattedText;
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class ResolveNamesVisitor;
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// ImplicitRules maps initial character of identifier to the DeclTypeSpec
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// representing the implicit type; std::nullopt if none.
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// It also records the presence of IMPLICIT NONE statements.
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// When inheritFromParent is set, defaults come from the parent rules.
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class ImplicitRules {
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public:
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ImplicitRules(SemanticsContext &context, ImplicitRules *parent)
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: parent_{parent}, context_{context} {
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inheritFromParent_ = parent != nullptr;
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}
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bool isImplicitNoneType() const;
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bool isImplicitNoneExternal() const;
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void set_isImplicitNoneType(bool x) { isImplicitNoneType_ = x; }
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void set_isImplicitNoneExternal(bool x) { isImplicitNoneExternal_ = x; }
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void set_inheritFromParent(bool x) { inheritFromParent_ = x; }
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// Get the implicit type for identifiers starting with ch. May be null.
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const DeclTypeSpec *GetType(char ch) const;
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// Record the implicit type for the range of characters [fromLetter,
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// toLetter].
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void SetTypeMapping(const DeclTypeSpec &type, parser::Location fromLetter,
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parser::Location toLetter);
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private:
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static char Incr(char ch);
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ImplicitRules *parent_;
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SemanticsContext &context_;
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bool inheritFromParent_{false}; // look in parent if not specified here
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bool isImplicitNoneType_{false};
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bool isImplicitNoneExternal_{false};
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// map_ contains the mapping between letters and types that were defined
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// by the IMPLICIT statements of the related scope. It does not contain
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// the default Fortran mappings nor the mapping defined in parents.
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std::map<char, common::Reference<const DeclTypeSpec>> map_;
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friend llvm::raw_ostream &operator<<(
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llvm::raw_ostream &, const ImplicitRules &);
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friend void ShowImplicitRule(
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llvm::raw_ostream &, const ImplicitRules &, char);
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};
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// scope -> implicit rules for that scope
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using ImplicitRulesMap = std::map<const Scope *, ImplicitRules>;
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// Track statement source locations and save messages.
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class MessageHandler {
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public:
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MessageHandler() { DIE("MessageHandler: default-constructed"); }
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explicit MessageHandler(SemanticsContext &c) : context_{&c} {}
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Messages &messages() { return context_->messages(); };
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const std::optional<SourceName> &currStmtSource() {
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return context_->location();
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}
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void set_currStmtSource(const std::optional<SourceName> &source) {
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context_->set_location(source);
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}
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// Emit a message associated with the current statement source.
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Message &Say(MessageFixedText &&);
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Message &Say(MessageFormattedText &&);
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// Emit a message about a SourceName
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Message &Say(const SourceName &, MessageFixedText &&);
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// Emit a formatted message associated with a source location.
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template <typename... A>
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Message &Say(const SourceName &source, MessageFixedText &&msg, A &&... args) {
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return context_->Say(source, std::move(msg), std::forward<A>(args)...);
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}
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private:
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SemanticsContext *context_;
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};
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// Inheritance graph for the parse tree visitation classes that follow:
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// BaseVisitor
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// + AttrsVisitor
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// | + DeclTypeSpecVisitor
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// | + ImplicitRulesVisitor
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// | + ScopeHandler -----------+--+
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// | + ModuleVisitor ========|==+
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// | + InterfaceVisitor | |
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// | +-+ SubprogramVisitor ==|==+
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// + ArraySpecVisitor | |
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// + DeclarationVisitor <--------+ |
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// + ConstructVisitor |
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// + ResolveNamesVisitor <------+
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class BaseVisitor {
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public:
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BaseVisitor() { DIE("BaseVisitor: default-constructed"); }
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BaseVisitor(
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SemanticsContext &c, ResolveNamesVisitor &v, ImplicitRulesMap &rules)
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: implicitRulesMap_{&rules}, this_{&v}, context_{&c}, messageHandler_{c} {
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}
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template <typename T> void Walk(const T &);
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MessageHandler &messageHandler() { return messageHandler_; }
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const std::optional<SourceName> &currStmtSource() {
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return context_->location();
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}
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SemanticsContext &context() const { return *context_; }
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evaluate::FoldingContext &GetFoldingContext() const {
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return context_->foldingContext();
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}
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// Make a placeholder symbol for a Name that otherwise wouldn't have one.
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// It is not in any scope and always has MiscDetails.
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void MakePlaceholder(const parser::Name &, MiscDetails::Kind);
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template <typename T> common::IfNoLvalue<T, T> FoldExpr(T &&expr) {
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return evaluate::Fold(GetFoldingContext(), std::move(expr));
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}
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template <typename T> MaybeExpr EvaluateExpr(const T &expr) {
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return FoldExpr(AnalyzeExpr(*context_, expr));
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}
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template <typename T>
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MaybeExpr EvaluateConvertedExpr(
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const Symbol &symbol, const T &expr, parser::CharBlock source) {
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if (context().HasError(symbol)) {
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return std::nullopt;
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}
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auto maybeExpr{AnalyzeExpr(*context_, expr)};
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if (!maybeExpr) {
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return std::nullopt;
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}
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auto exprType{maybeExpr->GetType()};
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auto converted{evaluate::ConvertToType(symbol, std::move(*maybeExpr))};
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if (!converted) {
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if (exprType) {
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Say(source,
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"Initialization expression could not be converted to declared type of '%s' from %s"_err_en_US,
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symbol.name(), exprType->AsFortran());
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} else {
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Say(source,
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"Initialization expression could not be converted to declared type of '%s'"_err_en_US,
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symbol.name());
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}
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return std::nullopt;
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}
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return FoldExpr(std::move(*converted));
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}
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template <typename T> MaybeIntExpr EvaluateIntExpr(const T &expr) {
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if (MaybeExpr maybeExpr{EvaluateExpr(expr)}) {
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if (auto *intExpr{evaluate::UnwrapExpr<SomeIntExpr>(*maybeExpr)}) {
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return std::move(*intExpr);
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}
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}
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return std::nullopt;
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}
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template <typename T>
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MaybeSubscriptIntExpr EvaluateSubscriptIntExpr(const T &expr) {
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if (MaybeIntExpr maybeIntExpr{EvaluateIntExpr(expr)}) {
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return FoldExpr(evaluate::ConvertToType<evaluate::SubscriptInteger>(
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std::move(*maybeIntExpr)));
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} else {
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return std::nullopt;
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}
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}
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template <typename... A> Message &Say(A &&... args) {
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return messageHandler_.Say(std::forward<A>(args)...);
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}
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template <typename... A>
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Message &Say(
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const parser::Name &name, MessageFixedText &&text, const A &... args) {
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return messageHandler_.Say(name.source, std::move(text), args...);
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}
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protected:
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ImplicitRulesMap *implicitRulesMap_{nullptr};
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private:
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ResolveNamesVisitor *this_;
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SemanticsContext *context_;
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MessageHandler messageHandler_;
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};
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// Provide Post methods to collect attributes into a member variable.
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class AttrsVisitor : public virtual BaseVisitor {
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public:
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bool BeginAttrs(); // always returns true
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Attrs GetAttrs();
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Attrs EndAttrs();
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bool SetPassNameOn(Symbol &);
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bool SetBindNameOn(Symbol &);
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void Post(const parser::LanguageBindingSpec &);
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bool Pre(const parser::IntentSpec &);
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bool Pre(const parser::Pass &);
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bool CheckAndSet(Attr);
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// Simple case: encountering CLASSNAME causes ATTRNAME to be set.
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#define HANDLE_ATTR_CLASS(CLASSNAME, ATTRNAME) \
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bool Pre(const parser::CLASSNAME &) { \
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CheckAndSet(Attr::ATTRNAME); \
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return false; \
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}
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HANDLE_ATTR_CLASS(PrefixSpec::Elemental, ELEMENTAL)
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HANDLE_ATTR_CLASS(PrefixSpec::Impure, IMPURE)
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HANDLE_ATTR_CLASS(PrefixSpec::Module, MODULE)
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HANDLE_ATTR_CLASS(PrefixSpec::Non_Recursive, NON_RECURSIVE)
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HANDLE_ATTR_CLASS(PrefixSpec::Pure, PURE)
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HANDLE_ATTR_CLASS(PrefixSpec::Recursive, RECURSIVE)
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HANDLE_ATTR_CLASS(TypeAttrSpec::BindC, BIND_C)
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HANDLE_ATTR_CLASS(BindAttr::Deferred, DEFERRED)
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HANDLE_ATTR_CLASS(BindAttr::Non_Overridable, NON_OVERRIDABLE)
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HANDLE_ATTR_CLASS(Abstract, ABSTRACT)
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HANDLE_ATTR_CLASS(Allocatable, ALLOCATABLE)
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HANDLE_ATTR_CLASS(Asynchronous, ASYNCHRONOUS)
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HANDLE_ATTR_CLASS(Contiguous, CONTIGUOUS)
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HANDLE_ATTR_CLASS(External, EXTERNAL)
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HANDLE_ATTR_CLASS(Intrinsic, INTRINSIC)
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HANDLE_ATTR_CLASS(NoPass, NOPASS)
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HANDLE_ATTR_CLASS(Optional, OPTIONAL)
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HANDLE_ATTR_CLASS(Parameter, PARAMETER)
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HANDLE_ATTR_CLASS(Pointer, POINTER)
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HANDLE_ATTR_CLASS(Protected, PROTECTED)
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HANDLE_ATTR_CLASS(Save, SAVE)
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HANDLE_ATTR_CLASS(Target, TARGET)
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HANDLE_ATTR_CLASS(Value, VALUE)
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HANDLE_ATTR_CLASS(Volatile, VOLATILE)
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#undef HANDLE_ATTR_CLASS
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protected:
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std::optional<Attrs> attrs_;
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Attr AccessSpecToAttr(const parser::AccessSpec &x) {
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switch (x.v) {
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case parser::AccessSpec::Kind::Public:
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return Attr::PUBLIC;
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case parser::AccessSpec::Kind::Private:
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return Attr::PRIVATE;
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}
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common::die("unreachable"); // suppress g++ warning
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}
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Attr IntentSpecToAttr(const parser::IntentSpec &x) {
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switch (x.v) {
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case parser::IntentSpec::Intent::In:
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return Attr::INTENT_IN;
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case parser::IntentSpec::Intent::Out:
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return Attr::INTENT_OUT;
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case parser::IntentSpec::Intent::InOut:
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return Attr::INTENT_INOUT;
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}
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common::die("unreachable"); // suppress g++ warning
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}
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private:
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bool IsDuplicateAttr(Attr);
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bool HaveAttrConflict(Attr, Attr, Attr);
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bool IsConflictingAttr(Attr);
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MaybeExpr bindName_; // from BIND(C, NAME="...")
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std::optional<SourceName> passName_; // from PASS(...)
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};
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// Find and create types from declaration-type-spec nodes.
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class DeclTypeSpecVisitor : public AttrsVisitor {
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public:
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using AttrsVisitor::Post;
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using AttrsVisitor::Pre;
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void Post(const parser::IntrinsicTypeSpec::DoublePrecision &);
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void Post(const parser::IntrinsicTypeSpec::DoubleComplex &);
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void Post(const parser::DeclarationTypeSpec::ClassStar &);
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void Post(const parser::DeclarationTypeSpec::TypeStar &);
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bool Pre(const parser::TypeGuardStmt &);
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void Post(const parser::TypeGuardStmt &);
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void Post(const parser::TypeSpec &);
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protected:
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struct State {
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bool expectDeclTypeSpec{false}; // should see decl-type-spec only when true
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const DeclTypeSpec *declTypeSpec{nullptr};
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struct {
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DerivedTypeSpec *type{nullptr};
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DeclTypeSpec::Category category{DeclTypeSpec::TypeDerived};
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} derived;
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bool allowForwardReferenceToDerivedType{false};
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};
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bool allowForwardReferenceToDerivedType() const {
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return state_.allowForwardReferenceToDerivedType;
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}
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void set_allowForwardReferenceToDerivedType(bool yes) {
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state_.allowForwardReferenceToDerivedType = yes;
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}
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// Walk the parse tree of a type spec and return the DeclTypeSpec for it.
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template <typename T>
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const DeclTypeSpec *ProcessTypeSpec(const T &x, bool allowForward = false) {
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auto restorer{common::ScopedSet(state_, State{})};
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set_allowForwardReferenceToDerivedType(allowForward);
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BeginDeclTypeSpec();
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Walk(x);
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const auto *type{GetDeclTypeSpec()};
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EndDeclTypeSpec();
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return type;
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}
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const DeclTypeSpec *GetDeclTypeSpec();
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void BeginDeclTypeSpec();
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void EndDeclTypeSpec();
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void SetDeclTypeSpec(const DeclTypeSpec &);
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void SetDeclTypeSpecCategory(DeclTypeSpec::Category);
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DeclTypeSpec::Category GetDeclTypeSpecCategory() const {
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return state_.derived.category;
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}
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KindExpr GetKindParamExpr(
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TypeCategory, const std::optional<parser::KindSelector> &);
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void CheckForAbstractType(const Symbol &typeSymbol);
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private:
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State state_;
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void MakeNumericType(TypeCategory, int kind);
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};
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// Visit ImplicitStmt and related parse tree nodes and updates implicit rules.
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class ImplicitRulesVisitor : public DeclTypeSpecVisitor {
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public:
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using DeclTypeSpecVisitor::Post;
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using DeclTypeSpecVisitor::Pre;
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using ImplicitNoneNameSpec = parser::ImplicitStmt::ImplicitNoneNameSpec;
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void Post(const parser::ParameterStmt &);
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bool Pre(const parser::ImplicitStmt &);
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bool Pre(const parser::LetterSpec &);
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bool Pre(const parser::ImplicitSpec &);
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void Post(const parser::ImplicitSpec &);
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ImplicitRules &implicitRules() { return *implicitRules_; }
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const ImplicitRules &implicitRules() const { return *implicitRules_; }
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bool isImplicitNoneType() const {
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return implicitRules().isImplicitNoneType();
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}
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bool isImplicitNoneExternal() const {
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return implicitRules().isImplicitNoneExternal();
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}
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protected:
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void BeginScope(const Scope &);
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void SetScope(const Scope &);
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private:
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// implicit rules in effect for current scope
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ImplicitRules *implicitRules_{nullptr};
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std::optional<SourceName> prevImplicit_;
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std::optional<SourceName> prevImplicitNone_;
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std::optional<SourceName> prevImplicitNoneType_;
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std::optional<SourceName> prevParameterStmt_;
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bool HandleImplicitNone(const std::list<ImplicitNoneNameSpec> &nameSpecs);
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};
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// Track array specifications. They can occur in AttrSpec, EntityDecl,
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// ObjectDecl, DimensionStmt, CommonBlockObject, or BasedPointerStmt.
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// 1. INTEGER, DIMENSION(10) :: x
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// 2. INTEGER :: x(10)
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// 3. ALLOCATABLE :: x(:)
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// 4. DIMENSION :: x(10)
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// 5. COMMON x(10)
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// 6. BasedPointerStmt
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class ArraySpecVisitor : public virtual BaseVisitor {
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public:
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void Post(const parser::ArraySpec &);
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void Post(const parser::ComponentArraySpec &);
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void Post(const parser::CoarraySpec &);
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void Post(const parser::AttrSpec &) { PostAttrSpec(); }
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void Post(const parser::ComponentAttrSpec &) { PostAttrSpec(); }
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protected:
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const ArraySpec &arraySpec();
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const ArraySpec &coarraySpec();
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void BeginArraySpec();
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void EndArraySpec();
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void ClearArraySpec() { arraySpec_.clear(); }
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void ClearCoarraySpec() { coarraySpec_.clear(); }
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private:
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// arraySpec_/coarraySpec_ are populated from any ArraySpec/CoarraySpec
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ArraySpec arraySpec_;
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ArraySpec coarraySpec_;
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// When an ArraySpec is under an AttrSpec or ComponentAttrSpec, it is moved
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// into attrArraySpec_
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ArraySpec attrArraySpec_;
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ArraySpec attrCoarraySpec_;
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void PostAttrSpec();
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};
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// Manage a stack of Scopes
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class ScopeHandler : public ImplicitRulesVisitor {
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public:
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using ImplicitRulesVisitor::Post;
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using ImplicitRulesVisitor::Pre;
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Scope &currScope() { return DEREF(currScope_); }
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// The enclosing scope, skipping blocks and derived types.
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// TODO: Will return the scope of a FORALL or implied DO loop; is this ok?
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// If not, should call FindProgramUnitContaining() instead.
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Scope &InclusiveScope();
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// Create a new scope and push it on the scope stack.
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void PushScope(Scope::Kind kind, Symbol *symbol);
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void PushScope(Scope &scope);
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void PopScope();
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void SetScope(Scope &);
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template <typename T> bool Pre(const parser::Statement<T> &x) {
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messageHandler().set_currStmtSource(x.source);
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currScope_->AddSourceRange(x.source);
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return true;
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}
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template <typename T> void Post(const parser::Statement<T> &) {
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messageHandler().set_currStmtSource(std::nullopt);
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}
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// Special messages: already declared; referencing symbol's declaration;
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// about a type; two names & locations
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void SayAlreadyDeclared(const parser::Name &, Symbol &);
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void SayAlreadyDeclared(const SourceName &, Symbol &);
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void SayAlreadyDeclared(const SourceName &, const SourceName &);
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void SayWithReason(
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const parser::Name &, Symbol &, MessageFixedText &&, MessageFixedText &&);
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void SayWithDecl(const parser::Name &, Symbol &, MessageFixedText &&);
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void SayLocalMustBeVariable(const parser::Name &, Symbol &);
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void SayDerivedType(const SourceName &, MessageFixedText &&, const Scope &);
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void Say2(const SourceName &, MessageFixedText &&, const SourceName &,
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MessageFixedText &&);
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void Say2(
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const SourceName &, MessageFixedText &&, Symbol &, MessageFixedText &&);
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void Say2(
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const parser::Name &, MessageFixedText &&, Symbol &, MessageFixedText &&);
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|
|
// Search for symbol by name in current, parent derived type, and
|
|
// containing scopes
|
|
Symbol *FindSymbol(const parser::Name &);
|
|
Symbol *FindSymbol(const Scope &, const parser::Name &);
|
|
// Search for name only in scope, not in enclosing scopes.
|
|
Symbol *FindInScope(const Scope &, const parser::Name &);
|
|
Symbol *FindInScope(const Scope &, const SourceName &);
|
|
// Search for name in a derived type scope and its parents.
|
|
Symbol *FindInTypeOrParents(const Scope &, const parser::Name &);
|
|
Symbol *FindInTypeOrParents(const parser::Name &);
|
|
void EraseSymbol(const parser::Name &);
|
|
void EraseSymbol(const Symbol &symbol) { currScope().erase(symbol.name()); }
|
|
// Make a new symbol with the name and attrs of an existing one
|
|
Symbol &CopySymbol(const SourceName &, const Symbol &);
|
|
|
|
// Make symbols in the current or named scope
|
|
Symbol &MakeSymbol(Scope &, const SourceName &, Attrs);
|
|
Symbol &MakeSymbol(const SourceName &, Attrs = Attrs{});
|
|
Symbol &MakeSymbol(const parser::Name &, Attrs = Attrs{});
|
|
|
|
template <typename D>
|
|
common::IfNoLvalue<Symbol &, D> MakeSymbol(
|
|
const parser::Name &name, D &&details) {
|
|
return MakeSymbol(name, Attrs{}, std::move(details));
|
|
}
|
|
|
|
template <typename D>
|
|
common::IfNoLvalue<Symbol &, D> MakeSymbol(
|
|
const parser::Name &name, const Attrs &attrs, D &&details) {
|
|
return Resolve(name, MakeSymbol(name.source, attrs, std::move(details)));
|
|
}
|
|
|
|
template <typename D>
|
|
common::IfNoLvalue<Symbol &, D> MakeSymbol(
|
|
const SourceName &name, const Attrs &attrs, D &&details) {
|
|
// Note: don't use FindSymbol here. If this is a derived type scope,
|
|
// we want to detect whether the name is already declared as a component.
|
|
auto *symbol{FindInScope(currScope(), name)};
|
|
if (!symbol) {
|
|
symbol = &MakeSymbol(name, attrs);
|
|
symbol->set_details(std::move(details));
|
|
return *symbol;
|
|
}
|
|
if constexpr (std::is_same_v<DerivedTypeDetails, D>) {
|
|
if (auto *d{symbol->detailsIf<GenericDetails>()}) {
|
|
if (!d->specific()) {
|
|
// derived type with same name as a generic
|
|
auto *derivedType{d->derivedType()};
|
|
if (!derivedType) {
|
|
derivedType =
|
|
&currScope().MakeSymbol(name, attrs, std::move(details));
|
|
d->set_derivedType(*derivedType);
|
|
} else {
|
|
SayAlreadyDeclared(name, *derivedType);
|
|
}
|
|
return *derivedType;
|
|
}
|
|
}
|
|
}
|
|
if (symbol->CanReplaceDetails(details)) {
|
|
// update the existing symbol
|
|
symbol->attrs() |= attrs;
|
|
symbol->set_details(std::move(details));
|
|
return *symbol;
|
|
} else if constexpr (std::is_same_v<UnknownDetails, D>) {
|
|
symbol->attrs() |= attrs;
|
|
return *symbol;
|
|
} else {
|
|
SayAlreadyDeclared(name, *symbol);
|
|
// replace the old symbol with a new one with correct details
|
|
EraseSymbol(*symbol);
|
|
auto &result{MakeSymbol(name, attrs, std::move(details))};
|
|
context().SetError(result);
|
|
return result;
|
|
}
|
|
}
|
|
|
|
void MakeExternal(Symbol &);
|
|
|
|
protected:
|
|
// Apply the implicit type rules to this symbol.
|
|
void ApplyImplicitRules(Symbol &);
|
|
const DeclTypeSpec *GetImplicitType(Symbol &);
|
|
bool ConvertToObjectEntity(Symbol &);
|
|
bool ConvertToProcEntity(Symbol &);
|
|
|
|
const DeclTypeSpec &MakeNumericType(
|
|
TypeCategory, const std::optional<parser::KindSelector> &);
|
|
const DeclTypeSpec &MakeLogicalType(
|
|
const std::optional<parser::KindSelector> &);
|
|
|
|
private:
|
|
Scope *currScope_{nullptr};
|
|
};
|
|
|
|
class ModuleVisitor : public virtual ScopeHandler {
|
|
public:
|
|
bool Pre(const parser::AccessStmt &);
|
|
bool Pre(const parser::Only &);
|
|
bool Pre(const parser::Rename::Names &);
|
|
bool Pre(const parser::Rename::Operators &);
|
|
bool Pre(const parser::UseStmt &);
|
|
void Post(const parser::UseStmt &);
|
|
|
|
void BeginModule(const parser::Name &, bool isSubmodule);
|
|
bool BeginSubmodule(const parser::Name &, const parser::ParentIdentifier &);
|
|
void ApplyDefaultAccess();
|
|
|
|
private:
|
|
// The default access spec for this module.
|
|
Attr defaultAccess_{Attr::PUBLIC};
|
|
// The location of the last AccessStmt without access-ids, if any.
|
|
std::optional<SourceName> prevAccessStmt_;
|
|
// The scope of the module during a UseStmt
|
|
const Scope *useModuleScope_{nullptr};
|
|
|
|
Symbol &SetAccess(const SourceName &, Attr attr, Symbol * = nullptr);
|
|
// A rename in a USE statement: local => use
|
|
struct SymbolRename {
|
|
Symbol *local{nullptr};
|
|
Symbol *use{nullptr};
|
|
};
|
|
// Record a use from useModuleScope_ of use Name/Symbol as local Name/Symbol
|
|
SymbolRename AddUse(const SourceName &localName, const SourceName &useName);
|
|
SymbolRename AddUse(const SourceName &, const SourceName &, Symbol *);
|
|
void AddUse(const SourceName &, Symbol &localSymbol, const Symbol &useSymbol);
|
|
void AddUse(const GenericSpecInfo &);
|
|
Scope *FindModule(const parser::Name &, Scope *ancestor = nullptr);
|
|
};
|
|
|
|
class InterfaceVisitor : public virtual ScopeHandler {
|
|
public:
|
|
bool Pre(const parser::InterfaceStmt &);
|
|
void Post(const parser::InterfaceStmt &);
|
|
void Post(const parser::EndInterfaceStmt &);
|
|
bool Pre(const parser::GenericSpec &);
|
|
bool Pre(const parser::ProcedureStmt &);
|
|
bool Pre(const parser::GenericStmt &);
|
|
void Post(const parser::GenericStmt &);
|
|
|
|
bool inInterfaceBlock() const;
|
|
bool isGeneric() const;
|
|
bool isAbstract() const;
|
|
|
|
protected:
|
|
GenericDetails &GetGenericDetails();
|
|
// Add to generic the symbol for the subprogram with the same name
|
|
void CheckGenericProcedures(Symbol &);
|
|
|
|
private:
|
|
// A new GenericInfo is pushed for each interface block and generic stmt
|
|
struct GenericInfo {
|
|
GenericInfo(bool isInterface, bool isAbstract = false)
|
|
: isInterface{isInterface}, isAbstract{isAbstract} {}
|
|
bool isInterface; // in interface block
|
|
bool isAbstract; // in abstract interface block
|
|
Symbol *symbol{nullptr}; // the generic symbol being defined
|
|
};
|
|
std::stack<GenericInfo> genericInfo_;
|
|
const GenericInfo &GetGenericInfo() const { return genericInfo_.top(); }
|
|
void SetGenericSymbol(Symbol &symbol) { genericInfo_.top().symbol = &symbol; }
|
|
|
|
using ProcedureKind = parser::ProcedureStmt::Kind;
|
|
// mapping of generic to its specific proc names and kinds
|
|
std::multimap<Symbol *, std::pair<const parser::Name *, ProcedureKind>>
|
|
specificProcs_;
|
|
|
|
void AddSpecificProcs(const std::list<parser::Name> &, ProcedureKind);
|
|
void ResolveSpecificsInGeneric(Symbol &generic);
|
|
};
|
|
|
|
class SubprogramVisitor : public virtual ScopeHandler, public InterfaceVisitor {
|
|
public:
|
|
bool HandleStmtFunction(const parser::StmtFunctionStmt &);
|
|
bool Pre(const parser::SubroutineStmt &);
|
|
void Post(const parser::SubroutineStmt &);
|
|
bool Pre(const parser::FunctionStmt &);
|
|
void Post(const parser::FunctionStmt &);
|
|
bool Pre(const parser::EntryStmt &);
|
|
void Post(const parser::EntryStmt &);
|
|
bool Pre(const parser::InterfaceBody::Subroutine &);
|
|
void Post(const parser::InterfaceBody::Subroutine &);
|
|
bool Pre(const parser::InterfaceBody::Function &);
|
|
void Post(const parser::InterfaceBody::Function &);
|
|
bool Pre(const parser::Suffix &);
|
|
bool Pre(const parser::PrefixSpec &);
|
|
void Post(const parser::ImplicitPart &);
|
|
|
|
bool BeginSubprogram(
|
|
const parser::Name &, Symbol::Flag, bool hasModulePrefix = false);
|
|
bool BeginMpSubprogram(const parser::Name &);
|
|
void PushBlockDataScope(const parser::Name &);
|
|
void EndSubprogram();
|
|
|
|
protected:
|
|
// Set when we see a stmt function that is really an array element assignment
|
|
bool badStmtFuncFound_{false};
|
|
bool inExecutionPart_{false};
|
|
|
|
private:
|
|
// Info about the current function: parse tree of the type in the PrefixSpec;
|
|
// name and symbol of the function result from the Suffix; source location.
|
|
struct {
|
|
const parser::DeclarationTypeSpec *parsedType{nullptr};
|
|
const parser::Name *resultName{nullptr};
|
|
Symbol *resultSymbol{nullptr};
|
|
std::optional<SourceName> source;
|
|
} funcInfo_;
|
|
|
|
// Create a subprogram symbol in the current scope and push a new scope.
|
|
void CheckExtantExternal(const parser::Name &, Symbol::Flag);
|
|
Symbol &PushSubprogramScope(const parser::Name &, Symbol::Flag);
|
|
Symbol *GetSpecificFromGeneric(const parser::Name &);
|
|
SubprogramDetails &PostSubprogramStmt(const parser::Name &);
|
|
};
|
|
|
|
class DeclarationVisitor : public ArraySpecVisitor,
|
|
public virtual ScopeHandler {
|
|
public:
|
|
using ArraySpecVisitor::Post;
|
|
using ScopeHandler::Post;
|
|
using ScopeHandler::Pre;
|
|
|
|
bool Pre(const parser::Initialization &);
|
|
void Post(const parser::EntityDecl &);
|
|
void Post(const parser::ObjectDecl &);
|
|
void Post(const parser::PointerDecl &);
|
|
bool Pre(const parser::BindStmt &) { return BeginAttrs(); }
|
|
void Post(const parser::BindStmt &) { EndAttrs(); }
|
|
bool Pre(const parser::BindEntity &);
|
|
bool Pre(const parser::NamedConstantDef &);
|
|
bool Pre(const parser::NamedConstant &);
|
|
void Post(const parser::EnumDef &);
|
|
bool Pre(const parser::Enumerator &);
|
|
bool Pre(const parser::AccessSpec &);
|
|
bool Pre(const parser::AsynchronousStmt &);
|
|
bool Pre(const parser::ContiguousStmt &);
|
|
bool Pre(const parser::ExternalStmt &);
|
|
bool Pre(const parser::IntentStmt &);
|
|
bool Pre(const parser::IntrinsicStmt &);
|
|
bool Pre(const parser::OptionalStmt &);
|
|
bool Pre(const parser::ProtectedStmt &);
|
|
bool Pre(const parser::ValueStmt &);
|
|
bool Pre(const parser::VolatileStmt &);
|
|
bool Pre(const parser::AllocatableStmt &) {
|
|
objectDeclAttr_ = Attr::ALLOCATABLE;
|
|
return true;
|
|
}
|
|
void Post(const parser::AllocatableStmt &) { objectDeclAttr_ = std::nullopt; }
|
|
bool Pre(const parser::TargetStmt &) {
|
|
objectDeclAttr_ = Attr::TARGET;
|
|
return true;
|
|
}
|
|
void Post(const parser::TargetStmt &) { objectDeclAttr_ = std::nullopt; }
|
|
void Post(const parser::DimensionStmt::Declaration &);
|
|
void Post(const parser::CodimensionDecl &);
|
|
bool Pre(const parser::TypeDeclarationStmt &) { return BeginDecl(); }
|
|
void Post(const parser::TypeDeclarationStmt &);
|
|
void Post(const parser::IntegerTypeSpec &);
|
|
void Post(const parser::IntrinsicTypeSpec::Real &);
|
|
void Post(const parser::IntrinsicTypeSpec::Complex &);
|
|
void Post(const parser::IntrinsicTypeSpec::Logical &);
|
|
void Post(const parser::IntrinsicTypeSpec::Character &);
|
|
void Post(const parser::CharSelector::LengthAndKind &);
|
|
void Post(const parser::CharLength &);
|
|
void Post(const parser::LengthSelector &);
|
|
bool Pre(const parser::KindParam &);
|
|
bool Pre(const parser::DeclarationTypeSpec::Type &);
|
|
void Post(const parser::DeclarationTypeSpec::Type &);
|
|
bool Pre(const parser::DeclarationTypeSpec::Class &);
|
|
void Post(const parser::DeclarationTypeSpec::Class &);
|
|
bool Pre(const parser::DeclarationTypeSpec::Record &);
|
|
void Post(const parser::DerivedTypeSpec &);
|
|
bool Pre(const parser::DerivedTypeDef &);
|
|
bool Pre(const parser::DerivedTypeStmt &);
|
|
void Post(const parser::DerivedTypeStmt &);
|
|
bool Pre(const parser::TypeParamDefStmt &) { return BeginDecl(); }
|
|
void Post(const parser::TypeParamDefStmt &);
|
|
bool Pre(const parser::TypeAttrSpec::Extends &);
|
|
bool Pre(const parser::PrivateStmt &);
|
|
bool Pre(const parser::SequenceStmt &);
|
|
bool Pre(const parser::ComponentDefStmt &) { return BeginDecl(); }
|
|
void Post(const parser::ComponentDefStmt &) { EndDecl(); }
|
|
void Post(const parser::ComponentDecl &);
|
|
bool Pre(const parser::ProcedureDeclarationStmt &);
|
|
void Post(const parser::ProcedureDeclarationStmt &);
|
|
bool Pre(const parser::DataComponentDefStmt &); // returns false
|
|
bool Pre(const parser::ProcComponentDefStmt &);
|
|
void Post(const parser::ProcComponentDefStmt &);
|
|
bool Pre(const parser::ProcPointerInit &);
|
|
void Post(const parser::ProcInterface &);
|
|
void Post(const parser::ProcDecl &);
|
|
bool Pre(const parser::TypeBoundProcedurePart &);
|
|
void Post(const parser::TypeBoundProcedurePart &);
|
|
void Post(const parser::ContainsStmt &);
|
|
bool Pre(const parser::TypeBoundProcBinding &) { return BeginAttrs(); }
|
|
void Post(const parser::TypeBoundProcBinding &) { EndAttrs(); }
|
|
void Post(const parser::TypeBoundProcedureStmt::WithoutInterface &);
|
|
void Post(const parser::TypeBoundProcedureStmt::WithInterface &);
|
|
void Post(const parser::FinalProcedureStmt &);
|
|
bool Pre(const parser::TypeBoundGenericStmt &);
|
|
bool Pre(const parser::AllocateStmt &);
|
|
void Post(const parser::AllocateStmt &);
|
|
bool Pre(const parser::StructureConstructor &);
|
|
bool Pre(const parser::NamelistStmt::Group &);
|
|
bool Pre(const parser::IoControlSpec &);
|
|
bool Pre(const parser::CommonStmt::Block &);
|
|
void Post(const parser::CommonStmt::Block &);
|
|
bool Pre(const parser::CommonBlockObject &);
|
|
void Post(const parser::CommonBlockObject &);
|
|
bool Pre(const parser::EquivalenceStmt &);
|
|
bool Pre(const parser::SaveStmt &);
|
|
bool Pre(const parser::BasedPointerStmt &);
|
|
|
|
void PointerInitialization(
|
|
const parser::Name &, const parser::InitialDataTarget &);
|
|
void PointerInitialization(
|
|
const parser::Name &, const parser::ProcPointerInit &);
|
|
void CheckExplicitInterface(const parser::Name &);
|
|
void CheckBindings(const parser::TypeBoundProcedureStmt::WithoutInterface &);
|
|
|
|
const parser::Name *ResolveDesignator(const parser::Designator &);
|
|
|
|
protected:
|
|
bool BeginDecl();
|
|
void EndDecl();
|
|
Symbol &DeclareObjectEntity(const parser::Name &, Attrs);
|
|
// Make sure that there's an entity in an enclosing scope called Name
|
|
Symbol &FindOrDeclareEnclosingEntity(const parser::Name &);
|
|
// Declare a LOCAL/LOCAL_INIT entity. If there isn't a type specified
|
|
// it comes from the entity in the containing scope, or implicit rules.
|
|
// Return pointer to the new symbol, or nullptr on error.
|
|
Symbol *DeclareLocalEntity(const parser::Name &);
|
|
// Declare a statement entity (e.g., an implied DO loop index).
|
|
// If there isn't a type specified, implicit rules apply.
|
|
// Return pointer to the new symbol, or nullptr on error.
|
|
Symbol *DeclareStatementEntity(
|
|
const parser::Name &, const std::optional<parser::IntegerTypeSpec> &);
|
|
bool CheckUseError(const parser::Name &);
|
|
void CheckAccessibility(const SourceName &, bool, Symbol &);
|
|
void CheckCommonBlocks();
|
|
void CheckSaveStmts();
|
|
void CheckEquivalenceSets();
|
|
bool CheckNotInBlock(const char *);
|
|
bool NameIsKnownOrIntrinsic(const parser::Name &);
|
|
|
|
// Each of these returns a pointer to a resolved Name (i.e. with symbol)
|
|
// or nullptr in case of error.
|
|
const parser::Name *ResolveStructureComponent(
|
|
const parser::StructureComponent &);
|
|
const parser::Name *ResolveDataRef(const parser::DataRef &);
|
|
const parser::Name *ResolveVariable(const parser::Variable &);
|
|
const parser::Name *ResolveName(const parser::Name &);
|
|
bool PassesSharedLocalityChecks(const parser::Name &name, Symbol &symbol);
|
|
Symbol *NoteInterfaceName(const parser::Name &);
|
|
|
|
private:
|
|
// The attribute corresponding to the statement containing an ObjectDecl
|
|
std::optional<Attr> objectDeclAttr_;
|
|
// Info about current character type while walking DeclTypeSpec.
|
|
// Also captures any "*length" specifier on an individual declaration.
|
|
struct {
|
|
std::optional<ParamValue> length;
|
|
std::optional<KindExpr> kind;
|
|
} charInfo_;
|
|
// Info about current derived type while walking DerivedTypeDef
|
|
struct {
|
|
const parser::Name *extends{nullptr}; // EXTENDS(name)
|
|
bool privateComps{false}; // components are private by default
|
|
bool privateBindings{false}; // bindings are private by default
|
|
bool sawContains{false}; // currently processing bindings
|
|
bool sequence{false}; // is a sequence type
|
|
const Symbol *type{nullptr}; // derived type being defined
|
|
} derivedTypeInfo_;
|
|
// Collect equivalence sets and process at end of specification part
|
|
std::vector<const std::list<parser::EquivalenceObject> *> equivalenceSets_;
|
|
// Info about common blocks in the current scope
|
|
struct {
|
|
Symbol *curr{nullptr}; // common block currently being processed
|
|
std::set<SourceName> names; // names in any common block of scope
|
|
} commonBlockInfo_;
|
|
// Info about about SAVE statements and attributes in current scope
|
|
struct {
|
|
std::optional<SourceName> saveAll; // "SAVE" without entity list
|
|
std::set<SourceName> entities; // names of entities with save attr
|
|
std::set<SourceName> commons; // names of common blocks with save attr
|
|
} saveInfo_;
|
|
// In a ProcedureDeclarationStmt or ProcComponentDefStmt, this is
|
|
// the interface name, if any.
|
|
const parser::Name *interfaceName_{nullptr};
|
|
// Map type-bound generic to binding names of its specific bindings
|
|
std::multimap<Symbol *, const parser::Name *> genericBindings_;
|
|
// Info about current ENUM
|
|
struct EnumeratorState {
|
|
// Enum value must hold inside a C_INT (7.6.2).
|
|
std::optional<int> value{0};
|
|
} enumerationState_;
|
|
|
|
bool HandleAttributeStmt(Attr, const std::list<parser::Name> &);
|
|
Symbol &HandleAttributeStmt(Attr, const parser::Name &);
|
|
Symbol &DeclareUnknownEntity(const parser::Name &, Attrs);
|
|
Symbol &DeclareProcEntity(const parser::Name &, Attrs, const ProcInterface &);
|
|
void SetType(const parser::Name &, const DeclTypeSpec &);
|
|
std::optional<DerivedTypeSpec> ResolveDerivedType(const parser::Name &);
|
|
std::optional<DerivedTypeSpec> ResolveExtendsType(
|
|
const parser::Name &, const parser::Name *);
|
|
Symbol *MakeTypeSymbol(const SourceName &, Details &&);
|
|
Symbol *MakeTypeSymbol(const parser::Name &, Details &&);
|
|
bool OkToAddComponent(const parser::Name &, const Symbol * = nullptr);
|
|
ParamValue GetParamValue(
|
|
const parser::TypeParamValue &, common::TypeParamAttr attr);
|
|
Symbol &MakeCommonBlockSymbol(const parser::Name &);
|
|
void CheckCommonBlockDerivedType(const SourceName &, const Symbol &);
|
|
std::optional<MessageFixedText> CheckSaveAttr(const Symbol &);
|
|
Attrs HandleSaveName(const SourceName &, Attrs);
|
|
void AddSaveName(std::set<SourceName> &, const SourceName &);
|
|
void SetSaveAttr(Symbol &);
|
|
bool HandleUnrestrictedSpecificIntrinsicFunction(const parser::Name &);
|
|
const parser::Name *FindComponent(const parser::Name *, const parser::Name &);
|
|
void CheckInitialDataTarget(const Symbol &, const SomeExpr &, SourceName);
|
|
void CheckInitialProcTarget(const Symbol &, const parser::Name &, SourceName);
|
|
void Initialization(const parser::Name &, const parser::Initialization &,
|
|
bool inComponentDecl);
|
|
bool PassesLocalityChecks(const parser::Name &name, Symbol &symbol);
|
|
|
|
// Declare an object or procedure entity.
|
|
// T is one of: EntityDetails, ObjectEntityDetails, ProcEntityDetails
|
|
template <typename T>
|
|
Symbol &DeclareEntity(const parser::Name &name, Attrs attrs) {
|
|
Symbol &symbol{MakeSymbol(name, attrs)};
|
|
if (symbol.has<T>()) {
|
|
// OK
|
|
} else if (symbol.has<UnknownDetails>()) {
|
|
symbol.set_details(T{});
|
|
} else if (auto *details{symbol.detailsIf<EntityDetails>()}) {
|
|
symbol.set_details(T{std::move(*details)});
|
|
} else if (std::is_same_v<EntityDetails, T> &&
|
|
(symbol.has<ObjectEntityDetails>() ||
|
|
symbol.has<ProcEntityDetails>())) {
|
|
// OK
|
|
} else if (auto *details{symbol.detailsIf<UseDetails>()}) {
|
|
Say(name.source,
|
|
"'%s' is use-associated from module '%s' and cannot be re-declared"_err_en_US,
|
|
name.source, details->module().name());
|
|
} else if (auto *details{symbol.detailsIf<SubprogramNameDetails>()}) {
|
|
if (details->kind() == SubprogramKind::Module) {
|
|
Say2(name,
|
|
"Declaration of '%s' conflicts with its use as module procedure"_err_en_US,
|
|
symbol, "Module procedure definition"_en_US);
|
|
} else if (details->kind() == SubprogramKind::Internal) {
|
|
Say2(name,
|
|
"Declaration of '%s' conflicts with its use as internal procedure"_err_en_US,
|
|
symbol, "Internal procedure definition"_en_US);
|
|
} else {
|
|
DIE("unexpected kind");
|
|
}
|
|
} else if (std::is_same_v<ObjectEntityDetails, T> &&
|
|
symbol.has<ProcEntityDetails>()) {
|
|
SayWithDecl(
|
|
name, symbol, "'%s' is already declared as a procedure"_err_en_US);
|
|
} else if (std::is_same_v<ProcEntityDetails, T> &&
|
|
symbol.has<ObjectEntityDetails>()) {
|
|
SayWithDecl(
|
|
name, symbol, "'%s' is already declared as an object"_err_en_US);
|
|
} else {
|
|
SayAlreadyDeclared(name, symbol);
|
|
}
|
|
return symbol;
|
|
}
|
|
};
|
|
|
|
// Resolve construct entities and statement entities.
|
|
// Check that construct names don't conflict with other names.
|
|
class ConstructVisitor : public virtual DeclarationVisitor {
|
|
public:
|
|
bool Pre(const parser::ConcurrentHeader &);
|
|
bool Pre(const parser::LocalitySpec::Local &);
|
|
bool Pre(const parser::LocalitySpec::LocalInit &);
|
|
bool Pre(const parser::LocalitySpec::Shared &);
|
|
bool Pre(const parser::AcSpec &);
|
|
bool Pre(const parser::AcImpliedDo &);
|
|
bool Pre(const parser::DataImpliedDo &);
|
|
bool Pre(const parser::DataStmtObject &);
|
|
bool Pre(const parser::DataStmtValue &);
|
|
bool Pre(const parser::DoConstruct &);
|
|
void Post(const parser::DoConstruct &);
|
|
bool Pre(const parser::ForallConstruct &);
|
|
void Post(const parser::ForallConstruct &);
|
|
bool Pre(const parser::ForallStmt &);
|
|
void Post(const parser::ForallStmt &);
|
|
bool Pre(const parser::BlockStmt &);
|
|
bool Pre(const parser::EndBlockStmt &);
|
|
void Post(const parser::Selector &);
|
|
bool Pre(const parser::AssociateStmt &);
|
|
void Post(const parser::EndAssociateStmt &);
|
|
void Post(const parser::Association &);
|
|
void Post(const parser::SelectTypeStmt &);
|
|
bool Pre(const parser::SelectTypeConstruct &);
|
|
void Post(const parser::SelectTypeConstruct &);
|
|
bool Pre(const parser::SelectTypeConstruct::TypeCase &);
|
|
void Post(const parser::SelectTypeConstruct::TypeCase &);
|
|
void Post(const parser::TypeGuardStmt::Guard &);
|
|
bool Pre(const parser::ChangeTeamStmt &);
|
|
void Post(const parser::EndChangeTeamStmt &);
|
|
void Post(const parser::CoarrayAssociation &);
|
|
|
|
// Definitions of construct names
|
|
bool Pre(const parser::WhereConstructStmt &x) { return CheckDef(x.t); }
|
|
bool Pre(const parser::ForallConstructStmt &x) { return CheckDef(x.t); }
|
|
bool Pre(const parser::CriticalStmt &x) { return CheckDef(x.t); }
|
|
bool Pre(const parser::LabelDoStmt &) {
|
|
return false; // error recovery
|
|
}
|
|
bool Pre(const parser::NonLabelDoStmt &x) { return CheckDef(x.t); }
|
|
bool Pre(const parser::IfThenStmt &x) { return CheckDef(x.t); }
|
|
bool Pre(const parser::SelectCaseStmt &x) { return CheckDef(x.t); }
|
|
bool Pre(const parser::SelectRankConstruct &);
|
|
void Post(const parser::SelectRankConstruct &);
|
|
bool Pre(const parser::SelectRankStmt &x) {
|
|
return CheckDef(std::get<0>(x.t));
|
|
}
|
|
bool Pre(const parser::SelectTypeStmt &x) {
|
|
return CheckDef(std::get<0>(x.t));
|
|
}
|
|
|
|
// References to construct names
|
|
void Post(const parser::MaskedElsewhereStmt &x) { CheckRef(x.t); }
|
|
void Post(const parser::ElsewhereStmt &x) { CheckRef(x.v); }
|
|
void Post(const parser::EndWhereStmt &x) { CheckRef(x.v); }
|
|
void Post(const parser::EndForallStmt &x) { CheckRef(x.v); }
|
|
void Post(const parser::EndCriticalStmt &x) { CheckRef(x.v); }
|
|
void Post(const parser::EndDoStmt &x) { CheckRef(x.v); }
|
|
void Post(const parser::ElseIfStmt &x) { CheckRef(x.t); }
|
|
void Post(const parser::ElseStmt &x) { CheckRef(x.v); }
|
|
void Post(const parser::EndIfStmt &x) { CheckRef(x.v); }
|
|
void Post(const parser::CaseStmt &x) { CheckRef(x.t); }
|
|
void Post(const parser::EndSelectStmt &x) { CheckRef(x.v); }
|
|
void Post(const parser::SelectRankCaseStmt &x) { CheckRef(x.t); }
|
|
void Post(const parser::TypeGuardStmt &x) { CheckRef(x.t); }
|
|
void Post(const parser::CycleStmt &x) { CheckRef(x.v); }
|
|
void Post(const parser::ExitStmt &x) { CheckRef(x.v); }
|
|
|
|
private:
|
|
// R1105 selector -> expr | variable
|
|
// expr is set in either case unless there were errors
|
|
struct Selector {
|
|
Selector() {}
|
|
Selector(const SourceName &source, MaybeExpr &&expr)
|
|
: source{source}, expr{std::move(expr)} {}
|
|
operator bool() const { return expr.has_value(); }
|
|
parser::CharBlock source;
|
|
MaybeExpr expr;
|
|
};
|
|
// association -> [associate-name =>] selector
|
|
struct Association {
|
|
const parser::Name *name{nullptr};
|
|
Selector selector;
|
|
};
|
|
std::vector<Association> associationStack_;
|
|
|
|
template <typename T> bool CheckDef(const T &t) {
|
|
return CheckDef(std::get<std::optional<parser::Name>>(t));
|
|
}
|
|
template <typename T> void CheckRef(const T &t) {
|
|
CheckRef(std::get<std::optional<parser::Name>>(t));
|
|
}
|
|
bool CheckDef(const std::optional<parser::Name> &);
|
|
void CheckRef(const std::optional<parser::Name> &);
|
|
const DeclTypeSpec &ToDeclTypeSpec(evaluate::DynamicType &&);
|
|
const DeclTypeSpec &ToDeclTypeSpec(
|
|
evaluate::DynamicType &&, MaybeSubscriptIntExpr &&length);
|
|
Symbol *MakeAssocEntity();
|
|
void SetTypeFromAssociation(Symbol &);
|
|
void SetAttrsFromAssociation(Symbol &);
|
|
Selector ResolveSelector(const parser::Selector &);
|
|
void ResolveIndexName(const parser::ConcurrentControl &control);
|
|
Association &GetCurrentAssociation();
|
|
void PushAssociation();
|
|
void PopAssociation();
|
|
};
|
|
|
|
// Create scopes for OpenMP constructs
|
|
class OmpVisitor : public virtual DeclarationVisitor {
|
|
public:
|
|
void AddOmpSourceRange(const parser::CharBlock &);
|
|
|
|
static bool NeedsScope(const parser::OpenMPBlockConstruct &);
|
|
|
|
bool Pre(const parser::OpenMPBlockConstruct &);
|
|
void Post(const parser::OpenMPBlockConstruct &);
|
|
bool Pre(const parser::OmpBeginBlockDirective &x) {
|
|
AddOmpSourceRange(x.source);
|
|
return true;
|
|
}
|
|
void Post(const parser::OmpBeginBlockDirective &) {
|
|
messageHandler().set_currStmtSource(std::nullopt);
|
|
}
|
|
bool Pre(const parser::OmpEndBlockDirective &x) {
|
|
AddOmpSourceRange(x.source);
|
|
return true;
|
|
}
|
|
void Post(const parser::OmpEndBlockDirective &) {
|
|
messageHandler().set_currStmtSource(std::nullopt);
|
|
}
|
|
|
|
bool Pre(const parser::OpenMPLoopConstruct &) {
|
|
PushScope(Scope::Kind::Block, nullptr);
|
|
return true;
|
|
}
|
|
void Post(const parser::OpenMPLoopConstruct &) { PopScope(); }
|
|
bool Pre(const parser::OmpBeginLoopDirective &x) {
|
|
AddOmpSourceRange(x.source);
|
|
return true;
|
|
}
|
|
void Post(const parser::OmpBeginLoopDirective &) {
|
|
messageHandler().set_currStmtSource(std::nullopt);
|
|
}
|
|
bool Pre(const parser::OmpEndLoopDirective &x) {
|
|
AddOmpSourceRange(x.source);
|
|
return true;
|
|
}
|
|
void Post(const parser::OmpEndLoopDirective &) {
|
|
messageHandler().set_currStmtSource(std::nullopt);
|
|
}
|
|
|
|
bool Pre(const parser::OpenMPSectionsConstruct &) {
|
|
PushScope(Scope::Kind::Block, nullptr);
|
|
return true;
|
|
}
|
|
void Post(const parser::OpenMPSectionsConstruct &) { PopScope(); }
|
|
bool Pre(const parser::OmpBeginSectionsDirective &x) {
|
|
AddOmpSourceRange(x.source);
|
|
return true;
|
|
}
|
|
void Post(const parser::OmpBeginSectionsDirective &) {
|
|
messageHandler().set_currStmtSource(std::nullopt);
|
|
}
|
|
bool Pre(const parser::OmpEndSectionsDirective &x) {
|
|
AddOmpSourceRange(x.source);
|
|
return true;
|
|
}
|
|
void Post(const parser::OmpEndSectionsDirective &) {
|
|
messageHandler().set_currStmtSource(std::nullopt);
|
|
}
|
|
};
|
|
|
|
bool OmpVisitor::NeedsScope(const parser::OpenMPBlockConstruct &x) {
|
|
const auto &beginBlockDir{std::get<parser::OmpBeginBlockDirective>(x.t)};
|
|
const auto &beginDir{std::get<parser::OmpBlockDirective>(beginBlockDir.t)};
|
|
switch (beginDir.v) {
|
|
case parser::OmpBlockDirective::Directive::TargetData:
|
|
case parser::OmpBlockDirective::Directive::Master:
|
|
case parser::OmpBlockDirective::Directive::Ordered:
|
|
return false;
|
|
default:
|
|
return true;
|
|
}
|
|
}
|
|
|
|
void OmpVisitor::AddOmpSourceRange(const parser::CharBlock &source) {
|
|
messageHandler().set_currStmtSource(source);
|
|
currScope().AddSourceRange(source);
|
|
}
|
|
|
|
bool OmpVisitor::Pre(const parser::OpenMPBlockConstruct &x) {
|
|
if (NeedsScope(x)) {
|
|
PushScope(Scope::Kind::Block, nullptr);
|
|
}
|
|
return true;
|
|
}
|
|
|
|
void OmpVisitor::Post(const parser::OpenMPBlockConstruct &x) {
|
|
if (NeedsScope(x)) {
|
|
PopScope();
|
|
}
|
|
}
|
|
|
|
// Data-sharing and Data-mapping attributes for data-refs in OpenMP construct
|
|
class OmpAttributeVisitor {
|
|
public:
|
|
explicit OmpAttributeVisitor(
|
|
SemanticsContext &context, ResolveNamesVisitor &resolver)
|
|
: context_{context}, resolver_{resolver} {}
|
|
|
|
template <typename A> void Walk(const A &x) { parser::Walk(x, *this); }
|
|
|
|
template <typename A> bool Pre(const A &) { return true; }
|
|
template <typename A> void Post(const A &) {}
|
|
|
|
bool Pre(const parser::SpecificationPart &x) {
|
|
Walk(std::get<std::list<parser::OpenMPDeclarativeConstruct>>(x.t));
|
|
return false;
|
|
}
|
|
|
|
bool Pre(const parser::OpenMPBlockConstruct &);
|
|
void Post(const parser::OpenMPBlockConstruct &) { PopContext(); }
|
|
void Post(const parser::OmpBeginBlockDirective &) {
|
|
GetContext().withinConstruct = true;
|
|
}
|
|
|
|
bool Pre(const parser::OpenMPLoopConstruct &);
|
|
void Post(const parser::OpenMPLoopConstruct &) { PopContext(); }
|
|
void Post(const parser::OmpBeginLoopDirective &) {
|
|
GetContext().withinConstruct = true;
|
|
}
|
|
bool Pre(const parser::DoConstruct &);
|
|
|
|
bool Pre(const parser::OpenMPSectionsConstruct &);
|
|
void Post(const parser::OpenMPSectionsConstruct &) { PopContext(); }
|
|
|
|
bool Pre(const parser::OpenMPThreadprivate &);
|
|
void Post(const parser::OpenMPThreadprivate &) { PopContext(); }
|
|
|
|
// 2.15.3 Data-Sharing Attribute Clauses
|
|
void Post(const parser::OmpDefaultClause &);
|
|
bool Pre(const parser::OmpClause::Shared &x) {
|
|
ResolveOmpObjectList(x.v, Symbol::Flag::OmpShared);
|
|
return false;
|
|
}
|
|
bool Pre(const parser::OmpClause::Private &x) {
|
|
ResolveOmpObjectList(x.v, Symbol::Flag::OmpPrivate);
|
|
return false;
|
|
}
|
|
bool Pre(const parser::OmpClause::Firstprivate &x) {
|
|
ResolveOmpObjectList(x.v, Symbol::Flag::OmpFirstPrivate);
|
|
return false;
|
|
}
|
|
bool Pre(const parser::OmpClause::Lastprivate &x) {
|
|
ResolveOmpObjectList(x.v, Symbol::Flag::OmpLastPrivate);
|
|
return false;
|
|
}
|
|
|
|
void Post(const parser::Name &);
|
|
|
|
private:
|
|
struct OmpContext {
|
|
OmpContext(const parser::CharBlock &source, OmpDirective d, Scope &s)
|
|
: directiveSource{source}, directive{d}, scope{s} {}
|
|
parser::CharBlock directiveSource;
|
|
OmpDirective directive;
|
|
Scope &scope;
|
|
// TODO: default DSA is implicitly determined in different ways
|
|
Symbol::Flag defaultDSA{Symbol::Flag::OmpShared};
|
|
// variables on Data-sharing attribute clauses
|
|
std::map<const Symbol *, Symbol::Flag> objectWithDSA;
|
|
bool withinConstruct{false};
|
|
std::size_t associatedLoopLevel{0};
|
|
};
|
|
// back() is the top of the stack
|
|
OmpContext &GetContext() {
|
|
CHECK(!ompContext_.empty());
|
|
return ompContext_.back();
|
|
}
|
|
void PushContext(const parser::CharBlock &source, OmpDirective dir) {
|
|
ompContext_.emplace_back(source, dir, context_.FindScope(source));
|
|
}
|
|
void PopContext() { ompContext_.pop_back(); }
|
|
void SetContextDirectiveSource(parser::CharBlock &dir) {
|
|
GetContext().directiveSource = dir;
|
|
}
|
|
void SetContextDirectiveEnum(OmpDirective dir) {
|
|
GetContext().directive = dir;
|
|
}
|
|
Scope &currScope() { return GetContext().scope; }
|
|
void SetContextDefaultDSA(Symbol::Flag flag) {
|
|
GetContext().defaultDSA = flag;
|
|
}
|
|
void AddToContextObjectWithDSA(
|
|
const Symbol &symbol, Symbol::Flag flag, OmpContext &context) {
|
|
context.objectWithDSA.emplace(&symbol, flag);
|
|
}
|
|
void AddToContextObjectWithDSA(const Symbol &symbol, Symbol::Flag flag) {
|
|
AddToContextObjectWithDSA(symbol, flag, GetContext());
|
|
}
|
|
bool IsObjectWithDSA(const Symbol &symbol) {
|
|
auto it{GetContext().objectWithDSA.find(&symbol)};
|
|
return it != GetContext().objectWithDSA.end();
|
|
}
|
|
|
|
void SetContextAssociatedLoopLevel(std::size_t level) {
|
|
GetContext().associatedLoopLevel = level;
|
|
}
|
|
std::size_t GetAssociatedLoopLevelFromClauses(const parser::OmpClauseList &);
|
|
|
|
Symbol &MakeAssocSymbol(const SourceName &name, Symbol &prev, Scope &scope) {
|
|
const auto pair{scope.try_emplace(name, Attrs{}, HostAssocDetails{prev})};
|
|
return *pair.first->second;
|
|
}
|
|
Symbol &MakeAssocSymbol(const SourceName &name, Symbol &prev) {
|
|
return MakeAssocSymbol(name, prev, currScope());
|
|
}
|
|
|
|
static const parser::Name *GetDesignatorNameIfDataRef(
|
|
const parser::Designator &designator) {
|
|
const auto *dataRef{std::get_if<parser::DataRef>(&designator.u)};
|
|
return dataRef ? std::get_if<parser::Name>(&dataRef->u) : nullptr;
|
|
}
|
|
|
|
static constexpr Symbol::Flags dataSharingAttributeFlags{
|
|
Symbol::Flag::OmpShared, Symbol::Flag::OmpPrivate,
|
|
Symbol::Flag::OmpFirstPrivate, Symbol::Flag::OmpLastPrivate,
|
|
Symbol::Flag::OmpReduction, Symbol::Flag::OmpLinear};
|
|
|
|
static constexpr Symbol::Flags ompFlagsRequireNewSymbol{
|
|
Symbol::Flag::OmpPrivate, Symbol::Flag::OmpLinear,
|
|
Symbol::Flag::OmpFirstPrivate, Symbol::Flag::OmpLastPrivate,
|
|
Symbol::Flag::OmpReduction};
|
|
|
|
static constexpr Symbol::Flags ompFlagsRequireMark{
|
|
Symbol::Flag::OmpThreadprivate};
|
|
|
|
void AddDataSharingAttributeObject(SymbolRef object) {
|
|
dataSharingAttributeObjects_.insert(object);
|
|
}
|
|
void ClearDataSharingAttributeObjects() {
|
|
dataSharingAttributeObjects_.clear();
|
|
}
|
|
bool HasDataSharingAttributeObject(const Symbol &);
|
|
|
|
const parser::DoConstruct *GetDoConstructIf(
|
|
const parser::ExecutionPartConstruct &);
|
|
// Predetermined DSA rules
|
|
void PrivatizeAssociatedLoopIndex(const parser::OpenMPLoopConstruct &);
|
|
const parser::Name &GetLoopIndex(const parser::DoConstruct &);
|
|
void ResolveSeqLoopIndexInParallelOrTaskConstruct(const parser::Name &);
|
|
|
|
void ResolveOmpObjectList(const parser::OmpObjectList &, Symbol::Flag);
|
|
void ResolveOmpObject(const parser::OmpObject &, Symbol::Flag);
|
|
Symbol *ResolveOmp(const parser::Name &, Symbol::Flag, Scope &);
|
|
Symbol *ResolveOmp(Symbol &, Symbol::Flag, Scope &);
|
|
Symbol *ResolveOmpCommonBlockName(const parser::Name *);
|
|
Symbol *DeclarePrivateAccessEntity(
|
|
const parser::Name &, Symbol::Flag, Scope &);
|
|
Symbol *DeclarePrivateAccessEntity(Symbol &, Symbol::Flag, Scope &);
|
|
Symbol *DeclareOrMarkOtherAccessEntity(const parser::Name &, Symbol::Flag);
|
|
Symbol *DeclareOrMarkOtherAccessEntity(Symbol &, Symbol::Flag);
|
|
void CheckMultipleAppearances(
|
|
const parser::Name &, const Symbol &, Symbol::Flag);
|
|
SymbolSet dataSharingAttributeObjects_; // on one directive
|
|
|
|
SemanticsContext &context_;
|
|
ResolveNamesVisitor &resolver_;
|
|
std::vector<OmpContext> ompContext_; // used as a stack
|
|
};
|
|
|
|
// Walk the parse tree and resolve names to symbols.
|
|
class ResolveNamesVisitor : public virtual ScopeHandler,
|
|
public ModuleVisitor,
|
|
public SubprogramVisitor,
|
|
public ConstructVisitor,
|
|
public OmpVisitor {
|
|
public:
|
|
using ArraySpecVisitor::Post;
|
|
using ConstructVisitor::Post;
|
|
using ConstructVisitor::Pre;
|
|
using DeclarationVisitor::Post;
|
|
using DeclarationVisitor::Pre;
|
|
using ImplicitRulesVisitor::Post;
|
|
using ImplicitRulesVisitor::Pre;
|
|
using InterfaceVisitor::Post;
|
|
using InterfaceVisitor::Pre;
|
|
using ModuleVisitor::Post;
|
|
using ModuleVisitor::Pre;
|
|
using OmpVisitor::Post;
|
|
using OmpVisitor::Pre;
|
|
using ScopeHandler::Post;
|
|
using ScopeHandler::Pre;
|
|
using SubprogramVisitor::Post;
|
|
using SubprogramVisitor::Pre;
|
|
|
|
ResolveNamesVisitor(SemanticsContext &context, ImplicitRulesMap &rules)
|
|
: BaseVisitor{context, *this, rules} {
|
|
PushScope(context.globalScope());
|
|
}
|
|
|
|
// Default action for a parse tree node is to visit children.
|
|
template <typename T> bool Pre(const T &) { return true; }
|
|
template <typename T> void Post(const T &) {}
|
|
|
|
bool Pre(const parser::SpecificationPart &);
|
|
void Post(const parser::Program &);
|
|
bool Pre(const parser::ImplicitStmt &);
|
|
void Post(const parser::PointerObject &);
|
|
void Post(const parser::AllocateObject &);
|
|
bool Pre(const parser::PointerAssignmentStmt &);
|
|
void Post(const parser::Designator &);
|
|
template <typename A, typename B>
|
|
void Post(const parser::LoopBounds<A, B> &x) {
|
|
ResolveName(*parser::Unwrap<parser::Name>(x.name));
|
|
}
|
|
void Post(const parser::ProcComponentRef &);
|
|
bool Pre(const parser::ActualArg &);
|
|
bool Pre(const parser::FunctionReference &);
|
|
bool Pre(const parser::CallStmt &);
|
|
bool Pre(const parser::ImportStmt &);
|
|
void Post(const parser::TypeGuardStmt &);
|
|
bool Pre(const parser::StmtFunctionStmt &);
|
|
bool Pre(const parser::DefinedOpName &);
|
|
bool Pre(const parser::ProgramUnit &);
|
|
void Post(const parser::AssignStmt &);
|
|
void Post(const parser::AssignedGotoStmt &);
|
|
|
|
// These nodes should never be reached: they are handled in ProgramUnit
|
|
bool Pre(const parser::MainProgram &) { DIE("unreachable"); }
|
|
bool Pre(const parser::FunctionSubprogram &) { DIE("unreachable"); }
|
|
bool Pre(const parser::SubroutineSubprogram &) { DIE("unreachable"); }
|
|
bool Pre(const parser::SeparateModuleSubprogram &) { DIE("unreachable"); }
|
|
bool Pre(const parser::Module &) { DIE("unreachable"); }
|
|
bool Pre(const parser::Submodule &) { DIE("unreachable"); }
|
|
bool Pre(const parser::BlockData &) { DIE("unreachable"); }
|
|
|
|
void NoteExecutablePartCall(Symbol::Flag, const parser::Call &);
|
|
|
|
friend void ResolveSpecificationParts(SemanticsContext &, const Symbol &);
|
|
|
|
private:
|
|
// Kind of procedure we are expecting to see in a ProcedureDesignator
|
|
std::optional<Symbol::Flag> expectedProcFlag_;
|
|
std::optional<SourceName> prevImportStmt_;
|
|
|
|
void PreSpecificationConstruct(const parser::SpecificationConstruct &);
|
|
void CreateGeneric(const parser::GenericSpec &);
|
|
void FinishSpecificationPart();
|
|
void CheckImports();
|
|
void CheckImport(const SourceName &, const SourceName &);
|
|
void HandleCall(Symbol::Flag, const parser::Call &);
|
|
void HandleProcedureName(Symbol::Flag, const parser::Name &);
|
|
bool SetProcFlag(const parser::Name &, Symbol &, Symbol::Flag);
|
|
void ResolveSpecificationParts(ProgramTree &);
|
|
void AddSubpNames(ProgramTree &);
|
|
bool BeginScopeForNode(const ProgramTree &);
|
|
void FinishSpecificationParts(const ProgramTree &);
|
|
void FinishDerivedTypeInstantiation(Scope &);
|
|
void ResolveExecutionParts(const ProgramTree &);
|
|
void ResolveOmpParts(const parser::ProgramUnit &);
|
|
};
|
|
|
|
// ImplicitRules implementation
|
|
|
|
bool ImplicitRules::isImplicitNoneType() const {
|
|
if (isImplicitNoneType_) {
|
|
return true;
|
|
} else if (map_.empty() && inheritFromParent_) {
|
|
return parent_->isImplicitNoneType();
|
|
} else {
|
|
return false; // default if not specified
|
|
}
|
|
}
|
|
|
|
bool ImplicitRules::isImplicitNoneExternal() const {
|
|
if (isImplicitNoneExternal_) {
|
|
return true;
|
|
} else if (inheritFromParent_) {
|
|
return parent_->isImplicitNoneExternal();
|
|
} else {
|
|
return false; // default if not specified
|
|
}
|
|
}
|
|
|
|
const DeclTypeSpec *ImplicitRules::GetType(char ch) const {
|
|
if (isImplicitNoneType_) {
|
|
return nullptr;
|
|
} else if (auto it{map_.find(ch)}; it != map_.end()) {
|
|
return &*it->second;
|
|
} else if (inheritFromParent_) {
|
|
return parent_->GetType(ch);
|
|
} else if (ch >= 'i' && ch <= 'n') {
|
|
return &context_.MakeNumericType(TypeCategory::Integer);
|
|
} else if (ch >= 'a' && ch <= 'z') {
|
|
return &context_.MakeNumericType(TypeCategory::Real);
|
|
} else {
|
|
return nullptr;
|
|
}
|
|
}
|
|
|
|
void ImplicitRules::SetTypeMapping(const DeclTypeSpec &type,
|
|
parser::Location fromLetter, parser::Location toLetter) {
|
|
for (char ch = *fromLetter; ch; ch = ImplicitRules::Incr(ch)) {
|
|
auto res{map_.emplace(ch, type)};
|
|
if (!res.second) {
|
|
context_.Say(parser::CharBlock{fromLetter},
|
|
"More than one implicit type specified for '%c'"_err_en_US, ch);
|
|
}
|
|
if (ch == *toLetter) {
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
// Return the next char after ch in a way that works for ASCII or EBCDIC.
|
|
// Return '\0' for the char after 'z'.
|
|
char ImplicitRules::Incr(char ch) {
|
|
switch (ch) {
|
|
case 'i':
|
|
return 'j';
|
|
case 'r':
|
|
return 's';
|
|
case 'z':
|
|
return '\0';
|
|
default:
|
|
return ch + 1;
|
|
}
|
|
}
|
|
|
|
llvm::raw_ostream &operator<<(
|
|
llvm::raw_ostream &o, const ImplicitRules &implicitRules) {
|
|
o << "ImplicitRules:\n";
|
|
for (char ch = 'a'; ch; ch = ImplicitRules::Incr(ch)) {
|
|
ShowImplicitRule(o, implicitRules, ch);
|
|
}
|
|
ShowImplicitRule(o, implicitRules, '_');
|
|
ShowImplicitRule(o, implicitRules, '$');
|
|
ShowImplicitRule(o, implicitRules, '@');
|
|
return o;
|
|
}
|
|
void ShowImplicitRule(
|
|
llvm::raw_ostream &o, const ImplicitRules &implicitRules, char ch) {
|
|
auto it{implicitRules.map_.find(ch)};
|
|
if (it != implicitRules.map_.end()) {
|
|
o << " " << ch << ": " << *it->second << '\n';
|
|
}
|
|
}
|
|
|
|
template <typename T> void BaseVisitor::Walk(const T &x) {
|
|
parser::Walk(x, *this_);
|
|
}
|
|
|
|
void BaseVisitor::MakePlaceholder(
|
|
const parser::Name &name, MiscDetails::Kind kind) {
|
|
if (!name.symbol) {
|
|
name.symbol = &context_->globalScope().MakeSymbol(
|
|
name.source, Attrs{}, MiscDetails{kind});
|
|
}
|
|
}
|
|
|
|
// AttrsVisitor implementation
|
|
|
|
bool AttrsVisitor::BeginAttrs() {
|
|
CHECK(!attrs_);
|
|
attrs_ = std::make_optional<Attrs>();
|
|
return true;
|
|
}
|
|
Attrs AttrsVisitor::GetAttrs() {
|
|
CHECK(attrs_);
|
|
return *attrs_;
|
|
}
|
|
Attrs AttrsVisitor::EndAttrs() {
|
|
Attrs result{GetAttrs()};
|
|
attrs_.reset();
|
|
passName_ = std::nullopt;
|
|
bindName_.reset();
|
|
return result;
|
|
}
|
|
|
|
bool AttrsVisitor::SetPassNameOn(Symbol &symbol) {
|
|
if (!passName_) {
|
|
return false;
|
|
}
|
|
std::visit(common::visitors{
|
|
[&](ProcEntityDetails &x) { x.set_passName(*passName_); },
|
|
[&](ProcBindingDetails &x) { x.set_passName(*passName_); },
|
|
[](auto &) { common::die("unexpected pass name"); },
|
|
},
|
|
symbol.details());
|
|
return true;
|
|
}
|
|
|
|
bool AttrsVisitor::SetBindNameOn(Symbol &symbol) {
|
|
if (!bindName_) {
|
|
return false;
|
|
}
|
|
std::visit(
|
|
common::visitors{
|
|
[&](EntityDetails &x) { x.set_bindName(std::move(bindName_)); },
|
|
[&](ObjectEntityDetails &x) { x.set_bindName(std::move(bindName_)); },
|
|
[&](ProcEntityDetails &x) { x.set_bindName(std::move(bindName_)); },
|
|
[&](SubprogramDetails &x) { x.set_bindName(std::move(bindName_)); },
|
|
[&](CommonBlockDetails &x) { x.set_bindName(std::move(bindName_)); },
|
|
[](auto &) { common::die("unexpected bind name"); },
|
|
},
|
|
symbol.details());
|
|
return true;
|
|
}
|
|
|
|
void AttrsVisitor::Post(const parser::LanguageBindingSpec &x) {
|
|
CHECK(attrs_);
|
|
if (CheckAndSet(Attr::BIND_C)) {
|
|
if (x.v) {
|
|
bindName_ = EvaluateExpr(*x.v);
|
|
}
|
|
}
|
|
}
|
|
bool AttrsVisitor::Pre(const parser::IntentSpec &x) {
|
|
CHECK(attrs_);
|
|
CheckAndSet(IntentSpecToAttr(x));
|
|
return false;
|
|
}
|
|
bool AttrsVisitor::Pre(const parser::Pass &x) {
|
|
if (CheckAndSet(Attr::PASS)) {
|
|
if (x.v) {
|
|
passName_ = x.v->source;
|
|
MakePlaceholder(*x.v, MiscDetails::Kind::PassName);
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|
|
// C730, C743, C755, C778, C1543 say no attribute or prefix repetitions
|
|
bool AttrsVisitor::IsDuplicateAttr(Attr attrName) {
|
|
if (attrs_->test(attrName)) {
|
|
Say(currStmtSource().value(),
|
|
"Attribute '%s' cannot be used more than once"_en_US,
|
|
AttrToString(attrName));
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
// See if attrName violates a constraint cause by a conflict. attr1 and attr2
|
|
// name attributes that cannot be used on the same declaration
|
|
bool AttrsVisitor::HaveAttrConflict(Attr attrName, Attr attr1, Attr attr2) {
|
|
if ((attrName == attr1 && attrs_->test(attr2)) ||
|
|
(attrName == attr2 && attrs_->test(attr1))) {
|
|
Say(currStmtSource().value(),
|
|
"Attributes '%s' and '%s' conflict with each other"_err_en_US,
|
|
AttrToString(attr1), AttrToString(attr2));
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
// C759, C1543
|
|
bool AttrsVisitor::IsConflictingAttr(Attr attrName) {
|
|
return HaveAttrConflict(attrName, Attr::INTENT_IN, Attr::INTENT_INOUT) ||
|
|
HaveAttrConflict(attrName, Attr::INTENT_IN, Attr::INTENT_OUT) ||
|
|
HaveAttrConflict(attrName, Attr::INTENT_INOUT, Attr::INTENT_OUT) ||
|
|
HaveAttrConflict(attrName, Attr::PASS, Attr::NOPASS) ||
|
|
HaveAttrConflict(attrName, Attr::PURE, Attr::IMPURE) ||
|
|
HaveAttrConflict(attrName, Attr::PUBLIC, Attr::PRIVATE) ||
|
|
HaveAttrConflict(attrName, Attr::RECURSIVE, Attr::NON_RECURSIVE);
|
|
}
|
|
bool AttrsVisitor::CheckAndSet(Attr attrName) {
|
|
CHECK(attrs_);
|
|
if (IsConflictingAttr(attrName) || IsDuplicateAttr(attrName)) {
|
|
return false;
|
|
}
|
|
attrs_->set(attrName);
|
|
return true;
|
|
}
|
|
|
|
// DeclTypeSpecVisitor implementation
|
|
|
|
const DeclTypeSpec *DeclTypeSpecVisitor::GetDeclTypeSpec() {
|
|
return state_.declTypeSpec;
|
|
}
|
|
|
|
void DeclTypeSpecVisitor::BeginDeclTypeSpec() {
|
|
CHECK(!state_.expectDeclTypeSpec);
|
|
CHECK(!state_.declTypeSpec);
|
|
state_.expectDeclTypeSpec = true;
|
|
}
|
|
void DeclTypeSpecVisitor::EndDeclTypeSpec() {
|
|
CHECK(state_.expectDeclTypeSpec);
|
|
state_ = {};
|
|
}
|
|
|
|
void DeclTypeSpecVisitor::SetDeclTypeSpecCategory(
|
|
DeclTypeSpec::Category category) {
|
|
CHECK(state_.expectDeclTypeSpec);
|
|
state_.derived.category = category;
|
|
}
|
|
|
|
bool DeclTypeSpecVisitor::Pre(const parser::TypeGuardStmt &) {
|
|
BeginDeclTypeSpec();
|
|
return true;
|
|
}
|
|
void DeclTypeSpecVisitor::Post(const parser::TypeGuardStmt &) {
|
|
EndDeclTypeSpec();
|
|
}
|
|
|
|
void DeclTypeSpecVisitor::Post(const parser::TypeSpec &typeSpec) {
|
|
// Record the resolved DeclTypeSpec in the parse tree for use by
|
|
// expression semantics if the DeclTypeSpec is a valid TypeSpec.
|
|
// The grammar ensures that it's an intrinsic or derived type spec,
|
|
// not TYPE(*) or CLASS(*) or CLASS(T).
|
|
if (const DeclTypeSpec * spec{state_.declTypeSpec}) {
|
|
switch (spec->category()) {
|
|
case DeclTypeSpec::Numeric:
|
|
case DeclTypeSpec::Logical:
|
|
case DeclTypeSpec::Character:
|
|
typeSpec.declTypeSpec = spec;
|
|
break;
|
|
case DeclTypeSpec::TypeDerived:
|
|
if (const DerivedTypeSpec * derived{spec->AsDerived()}) {
|
|
CheckForAbstractType(derived->typeSymbol()); // C703
|
|
typeSpec.declTypeSpec = spec;
|
|
}
|
|
break;
|
|
default:
|
|
CRASH_NO_CASE;
|
|
}
|
|
}
|
|
}
|
|
|
|
void DeclTypeSpecVisitor::Post(
|
|
const parser::IntrinsicTypeSpec::DoublePrecision &) {
|
|
MakeNumericType(TypeCategory::Real, context().doublePrecisionKind());
|
|
}
|
|
void DeclTypeSpecVisitor::Post(
|
|
const parser::IntrinsicTypeSpec::DoubleComplex &) {
|
|
MakeNumericType(TypeCategory::Complex, context().doublePrecisionKind());
|
|
}
|
|
void DeclTypeSpecVisitor::MakeNumericType(TypeCategory category, int kind) {
|
|
SetDeclTypeSpec(context().MakeNumericType(category, kind));
|
|
}
|
|
|
|
void DeclTypeSpecVisitor::CheckForAbstractType(const Symbol &typeSymbol) {
|
|
if (typeSymbol.attrs().test(Attr::ABSTRACT)) {
|
|
Say("ABSTRACT derived type may not be used here"_err_en_US);
|
|
}
|
|
}
|
|
|
|
void DeclTypeSpecVisitor::Post(const parser::DeclarationTypeSpec::ClassStar &) {
|
|
SetDeclTypeSpec(context().globalScope().MakeClassStarType());
|
|
}
|
|
void DeclTypeSpecVisitor::Post(const parser::DeclarationTypeSpec::TypeStar &) {
|
|
SetDeclTypeSpec(context().globalScope().MakeTypeStarType());
|
|
}
|
|
|
|
// Check that we're expecting to see a DeclTypeSpec (and haven't seen one yet)
|
|
// and save it in state_.declTypeSpec.
|
|
void DeclTypeSpecVisitor::SetDeclTypeSpec(const DeclTypeSpec &declTypeSpec) {
|
|
CHECK(state_.expectDeclTypeSpec);
|
|
CHECK(!state_.declTypeSpec);
|
|
state_.declTypeSpec = &declTypeSpec;
|
|
}
|
|
|
|
KindExpr DeclTypeSpecVisitor::GetKindParamExpr(
|
|
TypeCategory category, const std::optional<parser::KindSelector> &kind) {
|
|
return AnalyzeKindSelector(context(), category, kind);
|
|
}
|
|
|
|
// MessageHandler implementation
|
|
|
|
Message &MessageHandler::Say(MessageFixedText &&msg) {
|
|
return context_->Say(currStmtSource().value(), std::move(msg));
|
|
}
|
|
Message &MessageHandler::Say(MessageFormattedText &&msg) {
|
|
return context_->Say(currStmtSource().value(), std::move(msg));
|
|
}
|
|
Message &MessageHandler::Say(const SourceName &name, MessageFixedText &&msg) {
|
|
return Say(name, std::move(msg), name);
|
|
}
|
|
|
|
// ImplicitRulesVisitor implementation
|
|
|
|
void ImplicitRulesVisitor::Post(const parser::ParameterStmt &) {
|
|
prevParameterStmt_ = currStmtSource();
|
|
}
|
|
|
|
bool ImplicitRulesVisitor::Pre(const parser::ImplicitStmt &x) {
|
|
bool result{
|
|
std::visit(common::visitors{
|
|
[&](const std::list<ImplicitNoneNameSpec> &y) {
|
|
return HandleImplicitNone(y);
|
|
},
|
|
[&](const std::list<parser::ImplicitSpec> &) {
|
|
if (prevImplicitNoneType_) {
|
|
Say("IMPLICIT statement after IMPLICIT NONE or "
|
|
"IMPLICIT NONE(TYPE) statement"_err_en_US);
|
|
return false;
|
|
} else {
|
|
implicitRules().set_isImplicitNoneType(false);
|
|
}
|
|
return true;
|
|
},
|
|
},
|
|
x.u)};
|
|
prevImplicit_ = currStmtSource();
|
|
return result;
|
|
}
|
|
|
|
bool ImplicitRulesVisitor::Pre(const parser::LetterSpec &x) {
|
|
auto loLoc{std::get<parser::Location>(x.t)};
|
|
auto hiLoc{loLoc};
|
|
if (auto hiLocOpt{std::get<std::optional<parser::Location>>(x.t)}) {
|
|
hiLoc = *hiLocOpt;
|
|
if (*hiLoc < *loLoc) {
|
|
Say(hiLoc, "'%s' does not follow '%s' alphabetically"_err_en_US,
|
|
std::string(hiLoc, 1), std::string(loLoc, 1));
|
|
return false;
|
|
}
|
|
}
|
|
implicitRules().SetTypeMapping(*GetDeclTypeSpec(), loLoc, hiLoc);
|
|
return false;
|
|
}
|
|
|
|
bool ImplicitRulesVisitor::Pre(const parser::ImplicitSpec &) {
|
|
BeginDeclTypeSpec();
|
|
set_allowForwardReferenceToDerivedType(true);
|
|
return true;
|
|
}
|
|
|
|
void ImplicitRulesVisitor::Post(const parser::ImplicitSpec &) {
|
|
EndDeclTypeSpec();
|
|
}
|
|
|
|
void ImplicitRulesVisitor::SetScope(const Scope &scope) {
|
|
implicitRules_ = &DEREF(implicitRulesMap_).at(&scope);
|
|
prevImplicit_ = std::nullopt;
|
|
prevImplicitNone_ = std::nullopt;
|
|
prevImplicitNoneType_ = std::nullopt;
|
|
prevParameterStmt_ = std::nullopt;
|
|
}
|
|
void ImplicitRulesVisitor::BeginScope(const Scope &scope) {
|
|
// find or create implicit rules for this scope
|
|
DEREF(implicitRulesMap_).try_emplace(&scope, context(), implicitRules_);
|
|
SetScope(scope);
|
|
}
|
|
|
|
// TODO: for all of these errors, reference previous statement too
|
|
bool ImplicitRulesVisitor::HandleImplicitNone(
|
|
const std::list<ImplicitNoneNameSpec> &nameSpecs) {
|
|
if (prevImplicitNone_) {
|
|
Say("More than one IMPLICIT NONE statement"_err_en_US);
|
|
Say(*prevImplicitNone_, "Previous IMPLICIT NONE statement"_en_US);
|
|
return false;
|
|
}
|
|
if (prevParameterStmt_) {
|
|
Say("IMPLICIT NONE statement after PARAMETER statement"_err_en_US);
|
|
return false;
|
|
}
|
|
prevImplicitNone_ = currStmtSource();
|
|
if (nameSpecs.empty()) {
|
|
prevImplicitNoneType_ = currStmtSource();
|
|
implicitRules().set_isImplicitNoneType(true);
|
|
if (prevImplicit_) {
|
|
Say("IMPLICIT NONE statement after IMPLICIT statement"_err_en_US);
|
|
return false;
|
|
}
|
|
} else {
|
|
int sawType{0};
|
|
int sawExternal{0};
|
|
for (const auto noneSpec : nameSpecs) {
|
|
switch (noneSpec) {
|
|
case ImplicitNoneNameSpec::External:
|
|
implicitRules().set_isImplicitNoneExternal(true);
|
|
++sawExternal;
|
|
break;
|
|
case ImplicitNoneNameSpec::Type:
|
|
prevImplicitNoneType_ = currStmtSource();
|
|
implicitRules().set_isImplicitNoneType(true);
|
|
if (prevImplicit_) {
|
|
Say("IMPLICIT NONE(TYPE) after IMPLICIT statement"_err_en_US);
|
|
return false;
|
|
}
|
|
++sawType;
|
|
break;
|
|
}
|
|
}
|
|
if (sawType > 1) {
|
|
Say("TYPE specified more than once in IMPLICIT NONE statement"_err_en_US);
|
|
return false;
|
|
}
|
|
if (sawExternal > 1) {
|
|
Say("EXTERNAL specified more than once in IMPLICIT NONE statement"_err_en_US);
|
|
return false;
|
|
}
|
|
}
|
|
return true;
|
|
}
|
|
|
|
// ArraySpecVisitor implementation
|
|
|
|
void ArraySpecVisitor::Post(const parser::ArraySpec &x) {
|
|
CHECK(arraySpec_.empty());
|
|
arraySpec_ = AnalyzeArraySpec(context(), x);
|
|
}
|
|
void ArraySpecVisitor::Post(const parser::ComponentArraySpec &x) {
|
|
CHECK(arraySpec_.empty());
|
|
arraySpec_ = AnalyzeArraySpec(context(), x);
|
|
}
|
|
void ArraySpecVisitor::Post(const parser::CoarraySpec &x) {
|
|
CHECK(coarraySpec_.empty());
|
|
coarraySpec_ = AnalyzeCoarraySpec(context(), x);
|
|
}
|
|
|
|
const ArraySpec &ArraySpecVisitor::arraySpec() {
|
|
return !arraySpec_.empty() ? arraySpec_ : attrArraySpec_;
|
|
}
|
|
const ArraySpec &ArraySpecVisitor::coarraySpec() {
|
|
return !coarraySpec_.empty() ? coarraySpec_ : attrCoarraySpec_;
|
|
}
|
|
void ArraySpecVisitor::BeginArraySpec() {
|
|
CHECK(arraySpec_.empty());
|
|
CHECK(coarraySpec_.empty());
|
|
CHECK(attrArraySpec_.empty());
|
|
CHECK(attrCoarraySpec_.empty());
|
|
}
|
|
void ArraySpecVisitor::EndArraySpec() {
|
|
CHECK(arraySpec_.empty());
|
|
CHECK(coarraySpec_.empty());
|
|
attrArraySpec_.clear();
|
|
attrCoarraySpec_.clear();
|
|
}
|
|
void ArraySpecVisitor::PostAttrSpec() {
|
|
// Save dimension/codimension from attrs so we can process array/coarray-spec
|
|
// on the entity-decl
|
|
if (!arraySpec_.empty()) {
|
|
if (attrArraySpec_.empty()) {
|
|
attrArraySpec_ = arraySpec_;
|
|
arraySpec_.clear();
|
|
} else {
|
|
Say(currStmtSource().value(),
|
|
"Attribute 'DIMENSION' cannot be used more than once"_err_en_US);
|
|
}
|
|
}
|
|
if (!coarraySpec_.empty()) {
|
|
if (attrCoarraySpec_.empty()) {
|
|
attrCoarraySpec_ = coarraySpec_;
|
|
coarraySpec_.clear();
|
|
} else {
|
|
Say(currStmtSource().value(),
|
|
"Attribute 'CODIMENSION' cannot be used more than once"_err_en_US);
|
|
}
|
|
}
|
|
}
|
|
|
|
// ScopeHandler implementation
|
|
|
|
void ScopeHandler::SayAlreadyDeclared(const parser::Name &name, Symbol &prev) {
|
|
SayAlreadyDeclared(name.source, prev);
|
|
}
|
|
void ScopeHandler::SayAlreadyDeclared(const SourceName &name, Symbol &prev) {
|
|
if (context().HasError(prev)) {
|
|
// don't report another error about prev
|
|
} else if (const auto *details{prev.detailsIf<UseDetails>()}) {
|
|
Say(name, "'%s' is already declared in this scoping unit"_err_en_US)
|
|
.Attach(details->location(),
|
|
"It is use-associated with '%s' in module '%s'"_err_en_US,
|
|
details->symbol().name(), details->module().name());
|
|
} else {
|
|
SayAlreadyDeclared(name, prev.name());
|
|
}
|
|
context().SetError(prev);
|
|
}
|
|
void ScopeHandler::SayAlreadyDeclared(
|
|
const SourceName &name1, const SourceName &name2) {
|
|
if (name1.begin() < name2.begin()) {
|
|
SayAlreadyDeclared(name2, name1);
|
|
} else {
|
|
Say(name1, "'%s' is already declared in this scoping unit"_err_en_US)
|
|
.Attach(name2, "Previous declaration of '%s'"_en_US, name2);
|
|
}
|
|
}
|
|
|
|
void ScopeHandler::SayWithReason(const parser::Name &name, Symbol &symbol,
|
|
MessageFixedText &&msg1, MessageFixedText &&msg2) {
|
|
Say2(name, std::move(msg1), symbol, std::move(msg2));
|
|
context().SetError(symbol, msg1.isFatal());
|
|
}
|
|
|
|
void ScopeHandler::SayWithDecl(
|
|
const parser::Name &name, Symbol &symbol, MessageFixedText &&msg) {
|
|
SayWithReason(name, symbol, std::move(msg),
|
|
symbol.test(Symbol::Flag::Implicit) ? "Implicit declaration of '%s'"_en_US
|
|
: "Declaration of '%s'"_en_US);
|
|
}
|
|
|
|
void ScopeHandler::SayLocalMustBeVariable(
|
|
const parser::Name &name, Symbol &symbol) {
|
|
SayWithDecl(name, symbol,
|
|
"The name '%s' must be a variable to appear"
|
|
" in a locality-spec"_err_en_US);
|
|
}
|
|
|
|
void ScopeHandler::SayDerivedType(
|
|
const SourceName &name, MessageFixedText &&msg, const Scope &type) {
|
|
const Symbol &typeSymbol{DEREF(type.GetSymbol())};
|
|
Say(name, std::move(msg), name, typeSymbol.name())
|
|
.Attach(typeSymbol.name(), "Declaration of derived type '%s'"_en_US,
|
|
typeSymbol.name());
|
|
}
|
|
void ScopeHandler::Say2(const SourceName &name1, MessageFixedText &&msg1,
|
|
const SourceName &name2, MessageFixedText &&msg2) {
|
|
Say(name1, std::move(msg1)).Attach(name2, std::move(msg2), name2);
|
|
}
|
|
void ScopeHandler::Say2(const SourceName &name, MessageFixedText &&msg1,
|
|
Symbol &symbol, MessageFixedText &&msg2) {
|
|
Say2(name, std::move(msg1), symbol.name(), std::move(msg2));
|
|
context().SetError(symbol, msg1.isFatal());
|
|
}
|
|
void ScopeHandler::Say2(const parser::Name &name, MessageFixedText &&msg1,
|
|
Symbol &symbol, MessageFixedText &&msg2) {
|
|
Say2(name.source, std::move(msg1), symbol.name(), std::move(msg2));
|
|
context().SetError(symbol, msg1.isFatal());
|
|
}
|
|
|
|
Scope &ScopeHandler::InclusiveScope() {
|
|
for (auto *scope{&currScope()};; scope = &scope->parent()) {
|
|
if (scope->kind() != Scope::Kind::Block && !scope->IsDerivedType()) {
|
|
return *scope;
|
|
}
|
|
}
|
|
DIE("inclusive scope not found");
|
|
}
|
|
|
|
void ScopeHandler::PushScope(Scope::Kind kind, Symbol *symbol) {
|
|
PushScope(currScope().MakeScope(kind, symbol));
|
|
}
|
|
void ScopeHandler::PushScope(Scope &scope) {
|
|
currScope_ = &scope;
|
|
auto kind{currScope_->kind()};
|
|
if (kind != Scope::Kind::Block) {
|
|
BeginScope(scope);
|
|
}
|
|
// The name of a module or submodule cannot be "used" in its scope,
|
|
// as we read 19.3.1(2), so we allow the name to be used as a local
|
|
// identifier in the module or submodule too. Same with programs
|
|
// (14.1(3)) and BLOCK DATA.
|
|
if (!currScope_->IsDerivedType() && kind != Scope::Kind::Module &&
|
|
kind != Scope::Kind::MainProgram && kind != Scope::Kind::BlockData) {
|
|
if (auto *symbol{scope.symbol()}) {
|
|
// Create a dummy symbol so we can't create another one with the same
|
|
// name. It might already be there if we previously pushed the scope.
|
|
if (!FindInScope(scope, symbol->name())) {
|
|
auto &newSymbol{MakeSymbol(symbol->name())};
|
|
if (kind == Scope::Kind::Subprogram) {
|
|
// Allow for recursive references. If this symbol is a function
|
|
// without an explicit RESULT(), this new symbol will be discarded
|
|
// and replaced with an object of the same name.
|
|
newSymbol.set_details(HostAssocDetails{*symbol});
|
|
} else {
|
|
newSymbol.set_details(MiscDetails{MiscDetails::Kind::ScopeName});
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
void ScopeHandler::PopScope() {
|
|
// Entities that are not yet classified as objects or procedures are now
|
|
// assumed to be objects.
|
|
// TODO: Statement functions
|
|
for (auto &pair : currScope()) {
|
|
ConvertToObjectEntity(*pair.second);
|
|
}
|
|
SetScope(currScope_->parent());
|
|
}
|
|
void ScopeHandler::SetScope(Scope &scope) {
|
|
currScope_ = &scope;
|
|
ImplicitRulesVisitor::SetScope(InclusiveScope());
|
|
}
|
|
|
|
Symbol *ScopeHandler::FindSymbol(const parser::Name &name) {
|
|
return FindSymbol(currScope(), name);
|
|
}
|
|
Symbol *ScopeHandler::FindSymbol(const Scope &scope, const parser::Name &name) {
|
|
if (scope.IsDerivedType()) {
|
|
if (Symbol * symbol{scope.FindComponent(name.source)}) {
|
|
if (!symbol->has<ProcBindingDetails>() &&
|
|
!symbol->test(Symbol::Flag::ParentComp)) {
|
|
return Resolve(name, symbol);
|
|
}
|
|
}
|
|
return FindSymbol(scope.parent(), name);
|
|
} else {
|
|
return Resolve(name, scope.FindSymbol(name.source));
|
|
}
|
|
}
|
|
|
|
Symbol &ScopeHandler::MakeSymbol(
|
|
Scope &scope, const SourceName &name, Attrs attrs) {
|
|
if (Symbol * symbol{FindInScope(scope, name)}) {
|
|
symbol->attrs() |= attrs;
|
|
return *symbol;
|
|
} else {
|
|
const auto pair{scope.try_emplace(name, attrs, UnknownDetails{})};
|
|
CHECK(pair.second); // name was not found, so must be able to add
|
|
return *pair.first->second;
|
|
}
|
|
}
|
|
Symbol &ScopeHandler::MakeSymbol(const SourceName &name, Attrs attrs) {
|
|
return MakeSymbol(currScope(), name, attrs);
|
|
}
|
|
Symbol &ScopeHandler::MakeSymbol(const parser::Name &name, Attrs attrs) {
|
|
return Resolve(name, MakeSymbol(name.source, attrs));
|
|
}
|
|
Symbol &ScopeHandler::CopySymbol(const SourceName &name, const Symbol &symbol) {
|
|
CHECK(!FindInScope(currScope(), name));
|
|
return MakeSymbol(currScope(), name, symbol.attrs());
|
|
}
|
|
|
|
// Look for name only in scope, not in enclosing scopes.
|
|
Symbol *ScopeHandler::FindInScope(
|
|
const Scope &scope, const parser::Name &name) {
|
|
return Resolve(name, FindInScope(scope, name.source));
|
|
}
|
|
Symbol *ScopeHandler::FindInScope(const Scope &scope, const SourceName &name) {
|
|
if (auto it{scope.find(name)}; it != scope.end()) {
|
|
return &*it->second;
|
|
} else {
|
|
return nullptr;
|
|
}
|
|
}
|
|
|
|
// Find a component or type parameter by name in a derived type or its parents.
|
|
Symbol *ScopeHandler::FindInTypeOrParents(
|
|
const Scope &scope, const parser::Name &name) {
|
|
return Resolve(name, scope.FindComponent(name.source));
|
|
}
|
|
Symbol *ScopeHandler::FindInTypeOrParents(const parser::Name &name) {
|
|
return FindInTypeOrParents(currScope(), name);
|
|
}
|
|
|
|
void ScopeHandler::EraseSymbol(const parser::Name &name) {
|
|
currScope().erase(name.source);
|
|
name.symbol = nullptr;
|
|
}
|
|
|
|
static bool NeedsType(const Symbol &symbol) {
|
|
return !symbol.GetType() &&
|
|
std::visit(common::visitors{
|
|
[](const EntityDetails &) { return true; },
|
|
[](const ObjectEntityDetails &) { return true; },
|
|
[](const AssocEntityDetails &) { return true; },
|
|
[&](const ProcEntityDetails &p) {
|
|
return symbol.test(Symbol::Flag::Function) &&
|
|
!symbol.attrs().test(Attr::INTRINSIC) &&
|
|
!p.interface().type() && !p.interface().symbol();
|
|
},
|
|
[](const auto &) { return false; },
|
|
},
|
|
symbol.details());
|
|
}
|
|
void ScopeHandler::ApplyImplicitRules(Symbol &symbol) {
|
|
if (NeedsType(symbol)) {
|
|
if (const DeclTypeSpec * type{GetImplicitType(symbol)}) {
|
|
symbol.set(Symbol::Flag::Implicit);
|
|
symbol.SetType(*type);
|
|
} else if (symbol.has<ProcEntityDetails>() &&
|
|
!symbol.attrs().test(Attr::EXTERNAL) &&
|
|
context().intrinsics().IsIntrinsic(symbol.name().ToString())) {
|
|
// type will be determined in expression semantics
|
|
symbol.attrs().set(Attr::INTRINSIC);
|
|
} else if (!context().HasError(symbol)) {
|
|
Say(symbol.name(), "No explicit type declared for '%s'"_err_en_US);
|
|
context().SetError(symbol);
|
|
}
|
|
}
|
|
}
|
|
const DeclTypeSpec *ScopeHandler::GetImplicitType(Symbol &symbol) {
|
|
const DeclTypeSpec *type{implicitRules().GetType(symbol.name().begin()[0])};
|
|
if (type) {
|
|
if (const DerivedTypeSpec * derived{type->AsDerived()}) {
|
|
// Resolve any forward-referenced derived type; a quick no-op else.
|
|
auto &instantiatable{*const_cast<DerivedTypeSpec *>(derived)};
|
|
instantiatable.Instantiate(currScope(), context());
|
|
}
|
|
}
|
|
return type;
|
|
}
|
|
|
|
// Convert symbol to be a ObjectEntity or return false if it can't be.
|
|
bool ScopeHandler::ConvertToObjectEntity(Symbol &symbol) {
|
|
if (symbol.has<ObjectEntityDetails>()) {
|
|
// nothing to do
|
|
} else if (symbol.has<UnknownDetails>()) {
|
|
symbol.set_details(ObjectEntityDetails{});
|
|
} else if (auto *details{symbol.detailsIf<EntityDetails>()}) {
|
|
symbol.set_details(ObjectEntityDetails{std::move(*details)});
|
|
} else if (auto *useDetails{symbol.detailsIf<UseDetails>()}) {
|
|
return useDetails->symbol().has<ObjectEntityDetails>();
|
|
} else {
|
|
return false;
|
|
}
|
|
return true;
|
|
}
|
|
// Convert symbol to be a ProcEntity or return false if it can't be.
|
|
bool ScopeHandler::ConvertToProcEntity(Symbol &symbol) {
|
|
if (symbol.has<ProcEntityDetails>()) {
|
|
// nothing to do
|
|
} else if (symbol.has<UnknownDetails>()) {
|
|
symbol.set_details(ProcEntityDetails{});
|
|
} else if (auto *details{symbol.detailsIf<EntityDetails>()}) {
|
|
symbol.set_details(ProcEntityDetails{std::move(*details)});
|
|
if (symbol.GetType() && !symbol.test(Symbol::Flag::Implicit)) {
|
|
CHECK(!symbol.test(Symbol::Flag::Subroutine));
|
|
symbol.set(Symbol::Flag::Function);
|
|
}
|
|
} else {
|
|
return false;
|
|
}
|
|
return true;
|
|
}
|
|
|
|
const DeclTypeSpec &ScopeHandler::MakeNumericType(
|
|
TypeCategory category, const std::optional<parser::KindSelector> &kind) {
|
|
KindExpr value{GetKindParamExpr(category, kind)};
|
|
if (auto known{evaluate::ToInt64(value)}) {
|
|
return context().MakeNumericType(category, static_cast<int>(*known));
|
|
} else {
|
|
return currScope_->MakeNumericType(category, std::move(value));
|
|
}
|
|
}
|
|
|
|
const DeclTypeSpec &ScopeHandler::MakeLogicalType(
|
|
const std::optional<parser::KindSelector> &kind) {
|
|
KindExpr value{GetKindParamExpr(TypeCategory::Logical, kind)};
|
|
if (auto known{evaluate::ToInt64(value)}) {
|
|
return context().MakeLogicalType(static_cast<int>(*known));
|
|
} else {
|
|
return currScope_->MakeLogicalType(std::move(value));
|
|
}
|
|
}
|
|
|
|
void ScopeHandler::MakeExternal(Symbol &symbol) {
|
|
if (!symbol.attrs().test(Attr::EXTERNAL)) {
|
|
symbol.attrs().set(Attr::EXTERNAL);
|
|
if (symbol.attrs().test(Attr::INTRINSIC)) { // C840
|
|
Say(symbol.name(),
|
|
"Symbol '%s' cannot have both EXTERNAL and INTRINSIC attributes"_err_en_US,
|
|
symbol.name());
|
|
}
|
|
}
|
|
}
|
|
|
|
// ModuleVisitor implementation
|
|
|
|
bool ModuleVisitor::Pre(const parser::Only &x) {
|
|
std::visit(common::visitors{
|
|
[&](const Indirection<parser::GenericSpec> &generic) {
|
|
AddUse(GenericSpecInfo{generic.value()});
|
|
},
|
|
[&](const parser::Name &name) {
|
|
Resolve(name, AddUse(name.source, name.source).use);
|
|
},
|
|
[&](const parser::Rename &rename) { Walk(rename); },
|
|
},
|
|
x.u);
|
|
return false;
|
|
}
|
|
|
|
bool ModuleVisitor::Pre(const parser::Rename::Names &x) {
|
|
const auto &localName{std::get<0>(x.t)};
|
|
const auto &useName{std::get<1>(x.t)};
|
|
SymbolRename rename{AddUse(localName.source, useName.source)};
|
|
Resolve(useName, rename.use);
|
|
Resolve(localName, rename.local);
|
|
return false;
|
|
}
|
|
bool ModuleVisitor::Pre(const parser::Rename::Operators &x) {
|
|
const parser::DefinedOpName &local{std::get<0>(x.t)};
|
|
const parser::DefinedOpName &use{std::get<1>(x.t)};
|
|
GenericSpecInfo localInfo{local};
|
|
GenericSpecInfo useInfo{use};
|
|
if (IsIntrinsicOperator(context(), local.v.source)) {
|
|
Say(local.v,
|
|
"Intrinsic operator '%s' may not be used as a defined operator"_err_en_US);
|
|
} else if (IsLogicalConstant(context(), local.v.source)) {
|
|
Say(local.v,
|
|
"Logical constant '%s' may not be used as a defined operator"_err_en_US);
|
|
} else {
|
|
SymbolRename rename{AddUse(localInfo.symbolName(), useInfo.symbolName())};
|
|
useInfo.Resolve(rename.use);
|
|
localInfo.Resolve(rename.local);
|
|
}
|
|
return false;
|
|
}
|
|
|
|
// Set useModuleScope_ to the Scope of the module being used.
|
|
bool ModuleVisitor::Pre(const parser::UseStmt &x) {
|
|
useModuleScope_ = FindModule(x.moduleName);
|
|
return useModuleScope_ != nullptr;
|
|
}
|
|
void ModuleVisitor::Post(const parser::UseStmt &x) {
|
|
if (const auto *list{std::get_if<std::list<parser::Rename>>(&x.u)}) {
|
|
// Not a use-only: collect the names that were used in renames,
|
|
// then add a use for each public name that was not renamed.
|
|
std::set<SourceName> useNames;
|
|
for (const auto &rename : *list) {
|
|
std::visit(common::visitors{
|
|
[&](const parser::Rename::Names &names) {
|
|
useNames.insert(std::get<1>(names.t).source);
|
|
},
|
|
[&](const parser::Rename::Operators &ops) {
|
|
useNames.insert(std::get<1>(ops.t).v.source);
|
|
},
|
|
},
|
|
rename.u);
|
|
}
|
|
for (const auto &[name, symbol] : *useModuleScope_) {
|
|
if (symbol->attrs().test(Attr::PUBLIC) &&
|
|
!symbol->detailsIf<MiscDetails>()) {
|
|
if (useNames.count(name) == 0) {
|
|
auto *localSymbol{FindInScope(currScope(), name)};
|
|
if (!localSymbol) {
|
|
localSymbol = &CopySymbol(name, *symbol);
|
|
}
|
|
AddUse(x.moduleName.source, *localSymbol, *symbol);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
useModuleScope_ = nullptr;
|
|
}
|
|
|
|
ModuleVisitor::SymbolRename ModuleVisitor::AddUse(
|
|
const SourceName &localName, const SourceName &useName) {
|
|
return AddUse(localName, useName, FindInScope(*useModuleScope_, useName));
|
|
}
|
|
|
|
ModuleVisitor::SymbolRename ModuleVisitor::AddUse(
|
|
const SourceName &localName, const SourceName &useName, Symbol *useSymbol) {
|
|
if (!useModuleScope_) {
|
|
return {}; // error occurred finding module
|
|
}
|
|
if (!useSymbol) {
|
|
Say(useName,
|
|
IsDefinedOperator(useName)
|
|
? "Operator '%s' not found in module '%s'"_err_en_US
|
|
: "'%s' not found in module '%s'"_err_en_US,
|
|
useName, useModuleScope_->GetName().value());
|
|
return {};
|
|
}
|
|
if (useSymbol->attrs().test(Attr::PRIVATE)) {
|
|
Say(useName,
|
|
IsDefinedOperator(useName)
|
|
? "Operator '%s' is PRIVATE in '%s'"_err_en_US
|
|
: "'%s' is PRIVATE in '%s'"_err_en_US,
|
|
useName, useModuleScope_->GetName().value());
|
|
return {};
|
|
}
|
|
auto &localSymbol{MakeSymbol(localName)};
|
|
AddUse(useName, localSymbol, *useSymbol);
|
|
return {&localSymbol, useSymbol};
|
|
}
|
|
|
|
// symbol must be either a Use or a Generic formed by merging two uses.
|
|
// Convert it to a UseError with this additional location.
|
|
static void ConvertToUseError(
|
|
Symbol &symbol, const SourceName &location, const Scope &module) {
|
|
const auto *useDetails{symbol.detailsIf<UseDetails>()};
|
|
if (!useDetails) {
|
|
auto &genericDetails{symbol.get<GenericDetails>()};
|
|
useDetails = &genericDetails.useDetails().value();
|
|
}
|
|
symbol.set_details(
|
|
UseErrorDetails{*useDetails}.add_occurrence(location, module));
|
|
}
|
|
|
|
void ModuleVisitor::AddUse(
|
|
const SourceName &location, Symbol &localSymbol, const Symbol &useSymbol) {
|
|
localSymbol.attrs() = useSymbol.attrs() & ~Attrs{Attr::PUBLIC, Attr::PRIVATE};
|
|
localSymbol.flags() = useSymbol.flags();
|
|
if (auto *useDetails{localSymbol.detailsIf<UseDetails>()}) {
|
|
const Symbol &ultimate{localSymbol.GetUltimate()};
|
|
if (ultimate == useSymbol.GetUltimate()) {
|
|
// use-associating the same symbol again -- ok
|
|
} else if (ultimate.has<GenericDetails>() &&
|
|
useSymbol.has<GenericDetails>()) {
|
|
// use-associating generics with the same names: merge them into a
|
|
// new generic in this scope
|
|
auto generic1{ultimate.get<GenericDetails>()};
|
|
generic1.set_useDetails(*useDetails);
|
|
// useSymbol has specific g and so does generic1
|
|
auto &generic2{useSymbol.get<GenericDetails>()};
|
|
if (generic1.specific() && generic2.specific() &&
|
|
generic1.specific() != generic2.specific()) {
|
|
Say(location,
|
|
"Generic interface '%s' has ambiguous specific procedures"
|
|
" from modules '%s' and '%s'"_err_en_US,
|
|
localSymbol.name(), useDetails->module().name(),
|
|
useSymbol.owner().GetName().value());
|
|
} else if (generic1.derivedType() && generic2.derivedType() &&
|
|
generic1.derivedType() != generic2.derivedType()) {
|
|
Say(location,
|
|
"Generic interface '%s' has ambiguous derived types"
|
|
" from modules '%s' and '%s'"_err_en_US,
|
|
localSymbol.name(), useDetails->module().name(),
|
|
useSymbol.owner().GetName().value());
|
|
} else {
|
|
generic1.CopyFrom(generic2);
|
|
}
|
|
EraseSymbol(localSymbol);
|
|
MakeSymbol(localSymbol.name(), ultimate.attrs(), std::move(generic1));
|
|
} else {
|
|
ConvertToUseError(localSymbol, location, *useModuleScope_);
|
|
}
|
|
} else {
|
|
auto *genericDetails{localSymbol.detailsIf<GenericDetails>()};
|
|
if (genericDetails && genericDetails->useDetails()) {
|
|
// localSymbol came from merging two use-associated generics
|
|
if (auto *useDetails{useSymbol.detailsIf<GenericDetails>()}) {
|
|
genericDetails->CopyFrom(*useDetails);
|
|
} else {
|
|
ConvertToUseError(localSymbol, location, *useModuleScope_);
|
|
}
|
|
} else if (auto *details{localSymbol.detailsIf<UseErrorDetails>()}) {
|
|
details->add_occurrence(location, *useModuleScope_);
|
|
} else if (!localSymbol.has<UnknownDetails>()) {
|
|
Say(location,
|
|
"Cannot use-associate '%s'; it is already declared in this scope"_err_en_US,
|
|
localSymbol.name())
|
|
.Attach(localSymbol.name(), "Previous declaration of '%s'"_en_US,
|
|
localSymbol.name());
|
|
} else {
|
|
localSymbol.set_details(UseDetails{location, useSymbol});
|
|
}
|
|
}
|
|
}
|
|
|
|
void ModuleVisitor::AddUse(const GenericSpecInfo &info) {
|
|
if (useModuleScope_) {
|
|
const auto &name{info.symbolName()};
|
|
auto rename{
|
|
AddUse(name, name, info.FindInScope(context(), *useModuleScope_))};
|
|
info.Resolve(rename.use);
|
|
}
|
|
}
|
|
|
|
bool ModuleVisitor::BeginSubmodule(
|
|
const parser::Name &name, const parser::ParentIdentifier &parentId) {
|
|
auto &ancestorName{std::get<parser::Name>(parentId.t)};
|
|
auto &parentName{std::get<std::optional<parser::Name>>(parentId.t)};
|
|
Scope *ancestor{FindModule(ancestorName)};
|
|
if (!ancestor) {
|
|
return false;
|
|
}
|
|
Scope *parentScope{parentName ? FindModule(*parentName, ancestor) : ancestor};
|
|
if (!parentScope) {
|
|
return false;
|
|
}
|
|
PushScope(*parentScope); // submodule is hosted in parent
|
|
BeginModule(name, true);
|
|
if (!ancestor->AddSubmodule(name.source, currScope())) {
|
|
Say(name, "Module '%s' already has a submodule named '%s'"_err_en_US,
|
|
ancestorName.source, name.source);
|
|
}
|
|
return true;
|
|
}
|
|
|
|
void ModuleVisitor::BeginModule(const parser::Name &name, bool isSubmodule) {
|
|
auto &symbol{MakeSymbol(name, ModuleDetails{isSubmodule})};
|
|
auto &details{symbol.get<ModuleDetails>()};
|
|
PushScope(Scope::Kind::Module, &symbol);
|
|
details.set_scope(&currScope());
|
|
defaultAccess_ = Attr::PUBLIC;
|
|
prevAccessStmt_ = std::nullopt;
|
|
}
|
|
|
|
// Find a module or submodule by name and return its scope.
|
|
// If ancestor is present, look for a submodule of that ancestor module.
|
|
// May have to read a .mod file to find it.
|
|
// If an error occurs, report it and return nullptr.
|
|
Scope *ModuleVisitor::FindModule(const parser::Name &name, Scope *ancestor) {
|
|
ModFileReader reader{context()};
|
|
Scope *scope{reader.Read(name.source, ancestor)};
|
|
if (!scope) {
|
|
return nullptr;
|
|
}
|
|
if (scope->kind() != Scope::Kind::Module) {
|
|
Say(name, "'%s' is not a module"_err_en_US);
|
|
return nullptr;
|
|
}
|
|
if (DoesScopeContain(scope, currScope())) { // 14.2.2(1)
|
|
Say(name, "Module '%s' cannot USE itself"_err_en_US);
|
|
}
|
|
Resolve(name, scope->symbol());
|
|
return scope;
|
|
}
|
|
|
|
void ModuleVisitor::ApplyDefaultAccess() {
|
|
for (auto &pair : currScope()) {
|
|
Symbol &symbol = *pair.second;
|
|
if (!symbol.attrs().HasAny({Attr::PUBLIC, Attr::PRIVATE})) {
|
|
symbol.attrs().set(defaultAccess_);
|
|
}
|
|
}
|
|
}
|
|
|
|
// InterfaceVistor implementation
|
|
|
|
bool InterfaceVisitor::Pre(const parser::InterfaceStmt &x) {
|
|
bool isAbstract{std::holds_alternative<parser::Abstract>(x.u)};
|
|
genericInfo_.emplace(/*isInterface*/ true, isAbstract);
|
|
return BeginAttrs();
|
|
}
|
|
|
|
void InterfaceVisitor::Post(const parser::InterfaceStmt &) { EndAttrs(); }
|
|
|
|
void InterfaceVisitor::Post(const parser::EndInterfaceStmt &) {
|
|
genericInfo_.pop();
|
|
}
|
|
|
|
// Create a symbol in genericSymbol_ for this GenericSpec.
|
|
bool InterfaceVisitor::Pre(const parser::GenericSpec &x) {
|
|
if (auto *symbol{GenericSpecInfo{x}.FindInScope(context(), currScope())}) {
|
|
SetGenericSymbol(*symbol);
|
|
}
|
|
return false;
|
|
}
|
|
|
|
bool InterfaceVisitor::Pre(const parser::ProcedureStmt &x) {
|
|
if (!isGeneric()) {
|
|
Say("A PROCEDURE statement is only allowed in a generic interface block"_err_en_US);
|
|
return false;
|
|
}
|
|
auto kind{std::get<parser::ProcedureStmt::Kind>(x.t)};
|
|
const auto &names{std::get<std::list<parser::Name>>(x.t)};
|
|
AddSpecificProcs(names, kind);
|
|
return false;
|
|
}
|
|
|
|
bool InterfaceVisitor::Pre(const parser::GenericStmt &) {
|
|
genericInfo_.emplace(/*isInterface*/ false);
|
|
return true;
|
|
}
|
|
void InterfaceVisitor::Post(const parser::GenericStmt &x) {
|
|
if (auto &accessSpec{std::get<std::optional<parser::AccessSpec>>(x.t)}) {
|
|
GetGenericInfo().symbol->attrs().set(AccessSpecToAttr(*accessSpec));
|
|
}
|
|
const auto &names{std::get<std::list<parser::Name>>(x.t)};
|
|
AddSpecificProcs(names, ProcedureKind::Procedure);
|
|
genericInfo_.pop();
|
|
}
|
|
|
|
bool InterfaceVisitor::inInterfaceBlock() const {
|
|
return !genericInfo_.empty() && GetGenericInfo().isInterface;
|
|
}
|
|
bool InterfaceVisitor::isGeneric() const {
|
|
return !genericInfo_.empty() && GetGenericInfo().symbol;
|
|
}
|
|
bool InterfaceVisitor::isAbstract() const {
|
|
return !genericInfo_.empty() && GetGenericInfo().isAbstract;
|
|
}
|
|
GenericDetails &InterfaceVisitor::GetGenericDetails() {
|
|
return GetGenericInfo().symbol->get<GenericDetails>();
|
|
}
|
|
|
|
void InterfaceVisitor::AddSpecificProcs(
|
|
const std::list<parser::Name> &names, ProcedureKind kind) {
|
|
for (const auto &name : names) {
|
|
specificProcs_.emplace(
|
|
GetGenericInfo().symbol, std::make_pair(&name, kind));
|
|
}
|
|
}
|
|
|
|
// By now we should have seen all specific procedures referenced by name in
|
|
// this generic interface. Resolve those names to symbols.
|
|
void InterfaceVisitor::ResolveSpecificsInGeneric(Symbol &generic) {
|
|
auto &details{generic.get<GenericDetails>()};
|
|
std::set<SourceName> namesSeen; // to check for duplicate names
|
|
for (const Symbol &symbol : details.specificProcs()) {
|
|
namesSeen.insert(symbol.name());
|
|
}
|
|
auto range{specificProcs_.equal_range(&generic)};
|
|
for (auto it{range.first}; it != range.second; ++it) {
|
|
auto *name{it->second.first};
|
|
auto kind{it->second.second};
|
|
const auto *symbol{FindSymbol(*name)};
|
|
if (!symbol) {
|
|
Say(*name, "Procedure '%s' not found"_err_en_US);
|
|
continue;
|
|
}
|
|
symbol = &symbol->GetUltimate();
|
|
if (symbol == &generic) {
|
|
if (auto *specific{generic.get<GenericDetails>().specific()}) {
|
|
symbol = specific;
|
|
}
|
|
}
|
|
if (!symbol->has<SubprogramDetails>() &&
|
|
!symbol->has<SubprogramNameDetails>()) {
|
|
Say(*name, "'%s' is not a subprogram"_err_en_US);
|
|
continue;
|
|
}
|
|
if (kind == ProcedureKind::ModuleProcedure) {
|
|
if (const auto *nd{symbol->detailsIf<SubprogramNameDetails>()}) {
|
|
if (nd->kind() != SubprogramKind::Module) {
|
|
Say(*name, "'%s' is not a module procedure"_err_en_US);
|
|
}
|
|
} else {
|
|
// USE-associated procedure
|
|
const auto *sd{symbol->detailsIf<SubprogramDetails>()};
|
|
CHECK(sd);
|
|
if (symbol->owner().kind() != Scope::Kind::Module ||
|
|
sd->isInterface()) {
|
|
Say(*name, "'%s' is not a module procedure"_err_en_US);
|
|
}
|
|
}
|
|
}
|
|
if (!namesSeen.insert(name->source).second) {
|
|
Say(*name,
|
|
details.kind().IsDefinedOperator()
|
|
? "Procedure '%s' is already specified in generic operator '%s'"_err_en_US
|
|
: "Procedure '%s' is already specified in generic '%s'"_err_en_US,
|
|
name->source, generic.name());
|
|
continue;
|
|
}
|
|
details.AddSpecificProc(*symbol, name->source);
|
|
}
|
|
specificProcs_.erase(range.first, range.second);
|
|
}
|
|
|
|
// Check that the specific procedures are all functions or all subroutines.
|
|
// If there is a derived type with the same name they must be functions.
|
|
// Set the corresponding flag on generic.
|
|
void InterfaceVisitor::CheckGenericProcedures(Symbol &generic) {
|
|
ResolveSpecificsInGeneric(generic);
|
|
auto &details{generic.get<GenericDetails>()};
|
|
if (auto *proc{details.CheckSpecific()}) {
|
|
auto msg{
|
|
"'%s' may not be the name of both a generic interface and a"
|
|
" procedure unless it is a specific procedure of the generic"_err_en_US};
|
|
if (proc->name().begin() > generic.name().begin()) {
|
|
Say(proc->name(), std::move(msg));
|
|
} else {
|
|
Say(generic.name(), std::move(msg));
|
|
}
|
|
}
|
|
auto &specifics{details.specificProcs()};
|
|
if (specifics.empty()) {
|
|
if (details.derivedType()) {
|
|
generic.set(Symbol::Flag::Function);
|
|
}
|
|
return;
|
|
}
|
|
const Symbol &firstSpecific{specifics.front()};
|
|
bool isFunction{firstSpecific.test(Symbol::Flag::Function)};
|
|
for (const Symbol &specific : specifics) {
|
|
if (isFunction != specific.test(Symbol::Flag::Function)) { // C1514
|
|
auto &msg{Say(generic.name(),
|
|
"Generic interface '%s' has both a function and a subroutine"_err_en_US)};
|
|
if (isFunction) {
|
|
msg.Attach(firstSpecific.name(), "Function declaration"_en_US);
|
|
msg.Attach(specific.name(), "Subroutine declaration"_en_US);
|
|
} else {
|
|
msg.Attach(firstSpecific.name(), "Subroutine declaration"_en_US);
|
|
msg.Attach(specific.name(), "Function declaration"_en_US);
|
|
}
|
|
}
|
|
}
|
|
if (!isFunction && details.derivedType()) {
|
|
SayDerivedType(generic.name(),
|
|
"Generic interface '%s' may only contain functions due to derived type"
|
|
" with same name"_err_en_US,
|
|
*details.derivedType()->scope());
|
|
}
|
|
generic.set(isFunction ? Symbol::Flag::Function : Symbol::Flag::Subroutine);
|
|
}
|
|
|
|
// SubprogramVisitor implementation
|
|
|
|
// Return false if it is actually an assignment statement.
|
|
bool SubprogramVisitor::HandleStmtFunction(const parser::StmtFunctionStmt &x) {
|
|
const auto &name{std::get<parser::Name>(x.t)};
|
|
const DeclTypeSpec *resultType{nullptr};
|
|
// Look up name: provides return type or tells us if it's an array
|
|
if (auto *symbol{FindSymbol(name)}) {
|
|
auto *details{symbol->detailsIf<EntityDetails>()};
|
|
if (!details) {
|
|
badStmtFuncFound_ = true;
|
|
return false;
|
|
}
|
|
// TODO: check that attrs are compatible with stmt func
|
|
resultType = details->type();
|
|
symbol->details() = UnknownDetails{}; // will be replaced below
|
|
}
|
|
if (badStmtFuncFound_) {
|
|
Say(name, "'%s' has not been declared as an array"_err_en_US);
|
|
return true;
|
|
}
|
|
auto &symbol{PushSubprogramScope(name, Symbol::Flag::Function)};
|
|
EraseSymbol(symbol); // removes symbol added by PushSubprogramScope
|
|
auto &details{symbol.get<SubprogramDetails>()};
|
|
for (const auto &dummyName : std::get<std::list<parser::Name>>(x.t)) {
|
|
ObjectEntityDetails dummyDetails{true};
|
|
if (auto *dummySymbol{FindInScope(currScope().parent(), dummyName)}) {
|
|
if (auto *d{dummySymbol->detailsIf<EntityDetails>()}) {
|
|
if (d->type()) {
|
|
dummyDetails.set_type(*d->type());
|
|
}
|
|
}
|
|
}
|
|
Symbol &dummy{MakeSymbol(dummyName, std::move(dummyDetails))};
|
|
ApplyImplicitRules(dummy);
|
|
details.add_dummyArg(dummy);
|
|
}
|
|
ObjectEntityDetails resultDetails;
|
|
if (resultType) {
|
|
resultDetails.set_type(*resultType);
|
|
}
|
|
resultDetails.set_funcResult(true);
|
|
Symbol &result{MakeSymbol(name, std::move(resultDetails))};
|
|
ApplyImplicitRules(result);
|
|
details.set_result(result);
|
|
const auto &parsedExpr{std::get<parser::Scalar<parser::Expr>>(x.t)};
|
|
Walk(parsedExpr);
|
|
if (auto expr{AnalyzeExpr(context(), parsedExpr)}) {
|
|
details.set_stmtFunction(std::move(*expr));
|
|
} else {
|
|
context().SetError(symbol);
|
|
}
|
|
PopScope();
|
|
return true;
|
|
}
|
|
|
|
bool SubprogramVisitor::Pre(const parser::Suffix &suffix) {
|
|
if (suffix.resultName) {
|
|
funcInfo_.resultName = &suffix.resultName.value();
|
|
}
|
|
return true;
|
|
}
|
|
|
|
bool SubprogramVisitor::Pre(const parser::PrefixSpec &x) {
|
|
// Save this to process after UseStmt and ImplicitPart
|
|
if (const auto *parsedType{std::get_if<parser::DeclarationTypeSpec>(&x.u)}) {
|
|
if (funcInfo_.parsedType) { // C1543
|
|
Say(currStmtSource().value(),
|
|
"FUNCTION prefix cannot specify the type more than once"_err_en_US);
|
|
return false;
|
|
} else {
|
|
funcInfo_.parsedType = parsedType;
|
|
funcInfo_.source = currStmtSource();
|
|
return false;
|
|
}
|
|
} else {
|
|
return true;
|
|
}
|
|
}
|
|
|
|
void SubprogramVisitor::Post(const parser::ImplicitPart &) {
|
|
// If the function has a type in the prefix, process it now
|
|
if (funcInfo_.parsedType) {
|
|
messageHandler().set_currStmtSource(funcInfo_.source);
|
|
if (const auto *type{ProcessTypeSpec(*funcInfo_.parsedType, true)}) {
|
|
funcInfo_.resultSymbol->SetType(*type);
|
|
}
|
|
}
|
|
funcInfo_ = {};
|
|
}
|
|
|
|
bool SubprogramVisitor::Pre(const parser::InterfaceBody::Subroutine &x) {
|
|
const auto &name{std::get<parser::Name>(
|
|
std::get<parser::Statement<parser::SubroutineStmt>>(x.t).statement.t)};
|
|
return BeginSubprogram(name, Symbol::Flag::Subroutine);
|
|
}
|
|
void SubprogramVisitor::Post(const parser::InterfaceBody::Subroutine &) {
|
|
EndSubprogram();
|
|
}
|
|
bool SubprogramVisitor::Pre(const parser::InterfaceBody::Function &x) {
|
|
const auto &name{std::get<parser::Name>(
|
|
std::get<parser::Statement<parser::FunctionStmt>>(x.t).statement.t)};
|
|
return BeginSubprogram(name, Symbol::Flag::Function);
|
|
}
|
|
void SubprogramVisitor::Post(const parser::InterfaceBody::Function &) {
|
|
EndSubprogram();
|
|
}
|
|
|
|
bool SubprogramVisitor::Pre(const parser::SubroutineStmt &) {
|
|
return BeginAttrs();
|
|
}
|
|
bool SubprogramVisitor::Pre(const parser::FunctionStmt &) {
|
|
return BeginAttrs();
|
|
}
|
|
bool SubprogramVisitor::Pre(const parser::EntryStmt &) { return BeginAttrs(); }
|
|
|
|
void SubprogramVisitor::Post(const parser::SubroutineStmt &stmt) {
|
|
const auto &name{std::get<parser::Name>(stmt.t)};
|
|
auto &details{PostSubprogramStmt(name)};
|
|
for (const auto &dummyArg : std::get<std::list<parser::DummyArg>>(stmt.t)) {
|
|
if (const auto *dummyName{std::get_if<parser::Name>(&dummyArg.u)}) {
|
|
Symbol &dummy{MakeSymbol(*dummyName, EntityDetails(true))};
|
|
details.add_dummyArg(dummy);
|
|
} else {
|
|
details.add_alternateReturn();
|
|
}
|
|
}
|
|
}
|
|
|
|
void SubprogramVisitor::Post(const parser::FunctionStmt &stmt) {
|
|
const auto &name{std::get<parser::Name>(stmt.t)};
|
|
auto &details{PostSubprogramStmt(name)};
|
|
for (const auto &dummyName : std::get<std::list<parser::Name>>(stmt.t)) {
|
|
Symbol &dummy{MakeSymbol(dummyName, EntityDetails(true))};
|
|
details.add_dummyArg(dummy);
|
|
}
|
|
const parser::Name *funcResultName;
|
|
if (funcInfo_.resultName && funcInfo_.resultName->source != name.source) {
|
|
// Note that RESULT is ignored if it has the same name as the function.
|
|
funcResultName = funcInfo_.resultName;
|
|
} else {
|
|
EraseSymbol(name); // was added by PushSubprogramScope
|
|
funcResultName = &name;
|
|
}
|
|
// add function result to function scope
|
|
EntityDetails funcResultDetails;
|
|
funcResultDetails.set_funcResult(true);
|
|
funcInfo_.resultSymbol =
|
|
&MakeSymbol(*funcResultName, std::move(funcResultDetails));
|
|
details.set_result(*funcInfo_.resultSymbol);
|
|
|
|
// C1560.
|
|
if (funcInfo_.resultName && funcInfo_.resultName->source == name.source) {
|
|
Say(funcInfo_.resultName->source,
|
|
"The function name should not appear in RESULT, references to '%s' "
|
|
"inside"
|
|
" the function will be considered as references to the result only"_en_US,
|
|
name.source);
|
|
// RESULT name was ignored above, the only side effect from doing so will be
|
|
// the inability to make recursive calls. The related parser::Name is still
|
|
// resolved to the created function result symbol because every parser::Name
|
|
// should be resolved to avoid internal errors.
|
|
Resolve(*funcInfo_.resultName, funcInfo_.resultSymbol);
|
|
}
|
|
name.symbol = currScope().symbol(); // must not be function result symbol
|
|
// Clear the RESULT() name now in case an ENTRY statement in the implicit-part
|
|
// has a RESULT() suffix.
|
|
funcInfo_.resultName = nullptr;
|
|
}
|
|
|
|
SubprogramDetails &SubprogramVisitor::PostSubprogramStmt(
|
|
const parser::Name &name) {
|
|
Symbol &symbol{*currScope().symbol()};
|
|
CHECK(name.source == symbol.name());
|
|
SetBindNameOn(symbol);
|
|
symbol.attrs() |= EndAttrs();
|
|
if (symbol.attrs().test(Attr::MODULE)) {
|
|
symbol.attrs().set(Attr::EXTERNAL, false);
|
|
}
|
|
return symbol.get<SubprogramDetails>();
|
|
}
|
|
|
|
void SubprogramVisitor::Post(const parser::EntryStmt &stmt) {
|
|
auto attrs{EndAttrs()}; // needs to be called even if early return
|
|
Scope &inclusiveScope{InclusiveScope()};
|
|
const Symbol *subprogram{inclusiveScope.symbol()};
|
|
if (!subprogram) {
|
|
CHECK(context().AnyFatalError());
|
|
return;
|
|
}
|
|
const auto &name{std::get<parser::Name>(stmt.t)};
|
|
const auto *parentDetails{subprogram->detailsIf<SubprogramDetails>()};
|
|
bool inFunction{parentDetails && parentDetails->isFunction()};
|
|
const parser::Name *resultName{funcInfo_.resultName};
|
|
if (resultName) { // RESULT(result) is present
|
|
funcInfo_.resultName = nullptr;
|
|
if (!inFunction) {
|
|
Say2(resultName->source,
|
|
"RESULT(%s) may appear only in a function"_err_en_US,
|
|
subprogram->name(), "Containing subprogram"_en_US);
|
|
} else if (resultName->source == subprogram->name()) { // C1574
|
|
Say2(resultName->source,
|
|
"RESULT(%s) may not have the same name as the function"_err_en_US,
|
|
subprogram->name(), "Containing function"_en_US);
|
|
} else if (const Symbol *
|
|
symbol{FindSymbol(inclusiveScope.parent(), *resultName)}) { // C1574
|
|
if (const auto *details{symbol->detailsIf<SubprogramDetails>()}) {
|
|
if (details->entryScope() == &inclusiveScope) {
|
|
Say2(resultName->source,
|
|
"RESULT(%s) may not have the same name as an ENTRY in the function"_err_en_US,
|
|
symbol->name(), "Conflicting ENTRY"_en_US);
|
|
}
|
|
}
|
|
}
|
|
if (Symbol * symbol{FindSymbol(name)}) { // C1570
|
|
// When RESULT() appears, ENTRY name can't have been already declared
|
|
if (inclusiveScope.Contains(symbol->owner())) {
|
|
Say2(name,
|
|
"ENTRY name '%s' may not be declared when RESULT() is present"_err_en_US,
|
|
*symbol, "Previous declaration of '%s'"_en_US);
|
|
}
|
|
}
|
|
if (resultName->source == name.source) {
|
|
// ignore RESULT() hereafter when it's the same name as the ENTRY
|
|
resultName = nullptr;
|
|
}
|
|
}
|
|
SubprogramDetails entryDetails;
|
|
entryDetails.set_entryScope(inclusiveScope);
|
|
if (inFunction) {
|
|
// Create the entity to hold the function result, if necessary.
|
|
Symbol *resultSymbol{nullptr};
|
|
auto &effectiveResultName{*(resultName ? resultName : &name)};
|
|
resultSymbol = FindInScope(currScope(), effectiveResultName);
|
|
if (resultSymbol) { // C1574
|
|
std::visit(
|
|
common::visitors{[](EntityDetails &x) { x.set_funcResult(true); },
|
|
[](ObjectEntityDetails &x) { x.set_funcResult(true); },
|
|
[](ProcEntityDetails &x) { x.set_funcResult(true); },
|
|
[&](const auto &) {
|
|
Say2(effectiveResultName.source,
|
|
"'%s' was previously declared as an item that may not be used as a function result"_err_en_US,
|
|
resultSymbol->name(), "Previous declaration of '%s'"_en_US);
|
|
}},
|
|
resultSymbol->details());
|
|
} else if (inExecutionPart_) {
|
|
ObjectEntityDetails entity;
|
|
entity.set_funcResult(true);
|
|
resultSymbol = &MakeSymbol(effectiveResultName, std::move(entity));
|
|
ApplyImplicitRules(*resultSymbol);
|
|
} else {
|
|
EntityDetails entity;
|
|
entity.set_funcResult(true);
|
|
resultSymbol = &MakeSymbol(effectiveResultName, std::move(entity));
|
|
}
|
|
if (!resultName) {
|
|
name.symbol = nullptr; // symbol will be used for entry point below
|
|
}
|
|
entryDetails.set_result(*resultSymbol);
|
|
}
|
|
|
|
for (const auto &dummyArg : std::get<std::list<parser::DummyArg>>(stmt.t)) {
|
|
if (const auto *dummyName{std::get_if<parser::Name>(&dummyArg.u)}) {
|
|
Symbol *dummy{FindSymbol(*dummyName)};
|
|
if (dummy) {
|
|
std::visit(
|
|
common::visitors{[](EntityDetails &x) { x.set_isDummy(); },
|
|
[](ObjectEntityDetails &x) { x.set_isDummy(); },
|
|
[](ProcEntityDetails &x) { x.set_isDummy(); },
|
|
[&](const auto &) {
|
|
Say2(dummyName->source,
|
|
"ENTRY dummy argument '%s' is previously declared as an item that may not be used as a dummy argument"_err_en_US,
|
|
dummy->name(), "Previous declaration of '%s'"_en_US);
|
|
}},
|
|
dummy->details());
|
|
} else {
|
|
dummy = &MakeSymbol(*dummyName, EntityDetails(true));
|
|
}
|
|
entryDetails.add_dummyArg(*dummy);
|
|
} else {
|
|
if (inFunction) { // C1573
|
|
Say(name,
|
|
"ENTRY in a function may not have an alternate return dummy argument"_err_en_US);
|
|
break;
|
|
}
|
|
entryDetails.add_alternateReturn();
|
|
}
|
|
}
|
|
|
|
Symbol::Flag subpFlag{
|
|
inFunction ? Symbol::Flag::Function : Symbol::Flag::Subroutine};
|
|
CheckExtantExternal(name, subpFlag);
|
|
Scope &outer{inclusiveScope.parent()}; // global or module scope
|
|
if (Symbol * extant{FindSymbol(outer, name)}) {
|
|
if (extant->has<ProcEntityDetails>()) {
|
|
if (!extant->test(subpFlag)) {
|
|
Say2(name,
|
|
subpFlag == Symbol::Flag::Function
|
|
? "'%s' was previously called as a subroutine"_err_en_US
|
|
: "'%s' was previously called as a function"_err_en_US,
|
|
*extant, "Previous call of '%s'"_en_US);
|
|
}
|
|
if (extant->attrs().test(Attr::PRIVATE)) {
|
|
attrs.set(Attr::PRIVATE);
|
|
}
|
|
outer.erase(extant->name());
|
|
} else {
|
|
if (outer.IsGlobal()) {
|
|
Say2(name, "'%s' is already defined as a global identifier"_err_en_US,
|
|
*extant, "Previous definition of '%s'"_en_US);
|
|
} else {
|
|
SayAlreadyDeclared(name, *extant);
|
|
}
|
|
return;
|
|
}
|
|
}
|
|
if (outer.IsModule() && !attrs.test(Attr::PRIVATE)) {
|
|
attrs.set(Attr::PUBLIC);
|
|
}
|
|
Symbol &entrySymbol{MakeSymbol(outer, name.source, attrs)};
|
|
entrySymbol.set_details(std::move(entryDetails));
|
|
if (outer.IsGlobal()) {
|
|
MakeExternal(entrySymbol);
|
|
}
|
|
SetBindNameOn(entrySymbol);
|
|
entrySymbol.set(subpFlag);
|
|
Resolve(name, entrySymbol);
|
|
}
|
|
|
|
// A subprogram declared with MODULE PROCEDURE
|
|
bool SubprogramVisitor::BeginMpSubprogram(const parser::Name &name) {
|
|
auto *symbol{FindSymbol(name)};
|
|
if (symbol && symbol->has<SubprogramNameDetails>()) {
|
|
symbol = FindSymbol(currScope().parent(), name);
|
|
}
|
|
if (!IsSeparateModuleProcedureInterface(symbol)) {
|
|
Say(name, "'%s' was not declared a separate module procedure"_err_en_US);
|
|
return false;
|
|
}
|
|
if (symbol->owner() == currScope()) {
|
|
PushScope(Scope::Kind::Subprogram, symbol);
|
|
} else {
|
|
Symbol &newSymbol{MakeSymbol(name, SubprogramDetails{})};
|
|
PushScope(Scope::Kind::Subprogram, &newSymbol);
|
|
const auto &details{symbol->get<SubprogramDetails>()};
|
|
auto &newDetails{newSymbol.get<SubprogramDetails>()};
|
|
for (const Symbol *dummyArg : details.dummyArgs()) {
|
|
if (!dummyArg) {
|
|
newDetails.add_alternateReturn();
|
|
} else if (Symbol * copy{currScope().CopySymbol(*dummyArg)}) {
|
|
newDetails.add_dummyArg(*copy);
|
|
}
|
|
}
|
|
if (details.isFunction()) {
|
|
currScope().erase(symbol->name());
|
|
newDetails.set_result(*currScope().CopySymbol(details.result()));
|
|
}
|
|
}
|
|
return true;
|
|
}
|
|
|
|
// A subprogram declared with SUBROUTINE or FUNCTION
|
|
bool SubprogramVisitor::BeginSubprogram(
|
|
const parser::Name &name, Symbol::Flag subpFlag, bool hasModulePrefix) {
|
|
if (hasModulePrefix && !inInterfaceBlock() &&
|
|
!IsSeparateModuleProcedureInterface(
|
|
FindSymbol(currScope().parent(), name))) {
|
|
Say(name, "'%s' was not declared a separate module procedure"_err_en_US);
|
|
return false;
|
|
}
|
|
PushSubprogramScope(name, subpFlag);
|
|
return true;
|
|
}
|
|
|
|
void SubprogramVisitor::EndSubprogram() { PopScope(); }
|
|
|
|
void SubprogramVisitor::CheckExtantExternal(
|
|
const parser::Name &name, Symbol::Flag subpFlag) {
|
|
if (auto *prev{FindSymbol(name)}) {
|
|
if (prev->attrs().test(Attr::EXTERNAL) && prev->has<ProcEntityDetails>()) {
|
|
// this subprogram was previously called, now being declared
|
|
if (!prev->test(subpFlag)) {
|
|
Say2(name,
|
|
subpFlag == Symbol::Flag::Function
|
|
? "'%s' was previously called as a subroutine"_err_en_US
|
|
: "'%s' was previously called as a function"_err_en_US,
|
|
*prev, "Previous call of '%s'"_en_US);
|
|
}
|
|
EraseSymbol(name);
|
|
}
|
|
}
|
|
}
|
|
|
|
Symbol &SubprogramVisitor::PushSubprogramScope(
|
|
const parser::Name &name, Symbol::Flag subpFlag) {
|
|
auto *symbol{GetSpecificFromGeneric(name)};
|
|
if (!symbol) {
|
|
CheckExtantExternal(name, subpFlag);
|
|
symbol = &MakeSymbol(name, SubprogramDetails{});
|
|
}
|
|
symbol->set(subpFlag);
|
|
PushScope(Scope::Kind::Subprogram, symbol);
|
|
auto &details{symbol->get<SubprogramDetails>()};
|
|
if (inInterfaceBlock()) {
|
|
details.set_isInterface();
|
|
if (!isAbstract()) {
|
|
MakeExternal(*symbol);
|
|
}
|
|
if (isGeneric()) {
|
|
GetGenericDetails().AddSpecificProc(*symbol, name.source);
|
|
}
|
|
implicitRules().set_inheritFromParent(false);
|
|
}
|
|
FindSymbol(name)->set(subpFlag); // PushScope() created symbol
|
|
return *symbol;
|
|
}
|
|
|
|
void SubprogramVisitor::PushBlockDataScope(const parser::Name &name) {
|
|
if (auto *prev{FindSymbol(name)}) {
|
|
if (prev->attrs().test(Attr::EXTERNAL) && prev->has<ProcEntityDetails>()) {
|
|
if (prev->test(Symbol::Flag::Subroutine) ||
|
|
prev->test(Symbol::Flag::Function)) {
|
|
Say2(name, "BLOCK DATA '%s' has been called"_err_en_US, *prev,
|
|
"Previous call of '%s'"_en_US);
|
|
}
|
|
EraseSymbol(name);
|
|
}
|
|
}
|
|
if (name.source.empty()) {
|
|
// Don't let unnamed BLOCK DATA conflict with unnamed PROGRAM
|
|
PushScope(Scope::Kind::BlockData, nullptr);
|
|
} else {
|
|
PushScope(Scope::Kind::BlockData, &MakeSymbol(name, SubprogramDetails{}));
|
|
}
|
|
}
|
|
|
|
// If name is a generic, return specific subprogram with the same name.
|
|
Symbol *SubprogramVisitor::GetSpecificFromGeneric(const parser::Name &name) {
|
|
if (auto *symbol{FindSymbol(name)}) {
|
|
if (auto *details{symbol->detailsIf<GenericDetails>()}) {
|
|
// found generic, want subprogram
|
|
auto *specific{details->specific()};
|
|
if (!specific) {
|
|
specific =
|
|
&currScope().MakeSymbol(name.source, Attrs{}, SubprogramDetails{});
|
|
details->set_specific(Resolve(name, *specific));
|
|
} else if (isGeneric()) {
|
|
SayAlreadyDeclared(name, *specific);
|
|
} else if (!specific->has<SubprogramDetails>()) {
|
|
specific->set_details(SubprogramDetails{});
|
|
}
|
|
return specific;
|
|
}
|
|
}
|
|
return nullptr;
|
|
}
|
|
|
|
// DeclarationVisitor implementation
|
|
|
|
bool DeclarationVisitor::BeginDecl() {
|
|
BeginDeclTypeSpec();
|
|
BeginArraySpec();
|
|
return BeginAttrs();
|
|
}
|
|
void DeclarationVisitor::EndDecl() {
|
|
EndDeclTypeSpec();
|
|
EndArraySpec();
|
|
EndAttrs();
|
|
}
|
|
|
|
bool DeclarationVisitor::CheckUseError(const parser::Name &name) {
|
|
const auto *details{name.symbol->detailsIf<UseErrorDetails>()};
|
|
if (!details) {
|
|
return false;
|
|
}
|
|
Message &msg{Say(name, "Reference to '%s' is ambiguous"_err_en_US)};
|
|
for (const auto &[location, module] : details->occurrences()) {
|
|
msg.Attach(location, "'%s' was use-associated from module '%s'"_en_US,
|
|
name.source, module->GetName().value());
|
|
}
|
|
return true;
|
|
}
|
|
|
|
// Report error if accessibility of symbol doesn't match isPrivate.
|
|
void DeclarationVisitor::CheckAccessibility(
|
|
const SourceName &name, bool isPrivate, Symbol &symbol) {
|
|
if (symbol.attrs().test(Attr::PRIVATE) != isPrivate) {
|
|
Say2(name,
|
|
"'%s' does not have the same accessibility as its previous declaration"_err_en_US,
|
|
symbol, "Previous declaration of '%s'"_en_US);
|
|
}
|
|
}
|
|
|
|
void DeclarationVisitor::Post(const parser::TypeDeclarationStmt &) {
|
|
if (!GetAttrs().HasAny({Attr::POINTER, Attr::ALLOCATABLE})) { // C702
|
|
if (const auto *typeSpec{GetDeclTypeSpec()}) {
|
|
if (typeSpec->category() == DeclTypeSpec::Character) {
|
|
if (typeSpec->characterTypeSpec().length().isDeferred()) {
|
|
Say("The type parameter LEN cannot be deferred without"
|
|
" the POINTER or ALLOCATABLE attribute"_err_en_US);
|
|
}
|
|
} else if (const DerivedTypeSpec * derivedSpec{typeSpec->AsDerived()}) {
|
|
for (const auto &pair : derivedSpec->parameters()) {
|
|
if (pair.second.isDeferred()) {
|
|
Say(currStmtSource().value(),
|
|
"The value of type parameter '%s' cannot be deferred"
|
|
" without the POINTER or ALLOCATABLE attribute"_err_en_US,
|
|
pair.first);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
EndDecl();
|
|
}
|
|
|
|
void DeclarationVisitor::Post(const parser::DimensionStmt::Declaration &x) {
|
|
const auto &name{std::get<parser::Name>(x.t)};
|
|
DeclareObjectEntity(name, Attrs{});
|
|
}
|
|
void DeclarationVisitor::Post(const parser::CodimensionDecl &x) {
|
|
const auto &name{std::get<parser::Name>(x.t)};
|
|
DeclareObjectEntity(name, Attrs{});
|
|
}
|
|
|
|
bool DeclarationVisitor::Pre(const parser::Initialization &) {
|
|
// Defer inspection of initializers to Initialization() so that the
|
|
// symbol being initialized will be available within the initialization
|
|
// expression.
|
|
return false;
|
|
}
|
|
|
|
void DeclarationVisitor::Post(const parser::EntityDecl &x) {
|
|
// TODO: may be under StructureStmt
|
|
const auto &name{std::get<parser::ObjectName>(x.t)};
|
|
Attrs attrs{attrs_ ? HandleSaveName(name.source, *attrs_) : Attrs{}};
|
|
Symbol &symbol{DeclareUnknownEntity(name, attrs)};
|
|
symbol.ReplaceName(name.source);
|
|
if (auto &init{std::get<std::optional<parser::Initialization>>(x.t)}) {
|
|
if (ConvertToObjectEntity(symbol)) {
|
|
Initialization(name, *init, false);
|
|
}
|
|
} else if (attrs.test(Attr::PARAMETER)) { // C882, C883
|
|
Say(name, "Missing initialization for parameter '%s'"_err_en_US);
|
|
}
|
|
}
|
|
|
|
void DeclarationVisitor::Post(const parser::PointerDecl &x) {
|
|
const auto &name{std::get<parser::Name>(x.t)};
|
|
Symbol &symbol{DeclareUnknownEntity(name, Attrs{Attr::POINTER})};
|
|
symbol.ReplaceName(name.source);
|
|
}
|
|
|
|
bool DeclarationVisitor::Pre(const parser::BindEntity &x) {
|
|
auto kind{std::get<parser::BindEntity::Kind>(x.t)};
|
|
auto &name{std::get<parser::Name>(x.t)};
|
|
Symbol *symbol;
|
|
if (kind == parser::BindEntity::Kind::Object) {
|
|
symbol = &HandleAttributeStmt(Attr::BIND_C, name);
|
|
} else {
|
|
symbol = &MakeCommonBlockSymbol(name);
|
|
symbol->attrs().set(Attr::BIND_C);
|
|
}
|
|
SetBindNameOn(*symbol);
|
|
return false;
|
|
}
|
|
bool DeclarationVisitor::Pre(const parser::NamedConstantDef &x) {
|
|
auto &name{std::get<parser::NamedConstant>(x.t).v};
|
|
auto &symbol{HandleAttributeStmt(Attr::PARAMETER, name)};
|
|
if (!ConvertToObjectEntity(symbol) ||
|
|
symbol.test(Symbol::Flag::CrayPointer) ||
|
|
symbol.test(Symbol::Flag::CrayPointee)) {
|
|
SayWithDecl(
|
|
name, symbol, "PARAMETER attribute not allowed on '%s'"_err_en_US);
|
|
return false;
|
|
}
|
|
const auto &expr{std::get<parser::ConstantExpr>(x.t)};
|
|
ApplyImplicitRules(symbol);
|
|
Walk(expr);
|
|
if (auto converted{
|
|
EvaluateConvertedExpr(symbol, expr, expr.thing.value().source)}) {
|
|
symbol.get<ObjectEntityDetails>().set_init(std::move(*converted));
|
|
}
|
|
return false;
|
|
}
|
|
bool DeclarationVisitor::Pre(const parser::NamedConstant &x) {
|
|
const parser::Name &name{x.v};
|
|
if (!FindSymbol(name)) {
|
|
Say(name, "Named constant '%s' not found"_err_en_US);
|
|
} else {
|
|
CheckUseError(name);
|
|
}
|
|
return false;
|
|
}
|
|
|
|
bool DeclarationVisitor::Pre(const parser::Enumerator &enumerator) {
|
|
const parser::Name &name{std::get<parser::NamedConstant>(enumerator.t).v};
|
|
Symbol *symbol{FindSymbol(name)};
|
|
if (symbol) {
|
|
// Contrary to named constants appearing in a PARAMETER statement,
|
|
// enumerator names should not have their type, dimension or any other
|
|
// attributes defined before they are declared in the enumerator statement.
|
|
// This is not explicitly forbidden by the standard, but they are scalars
|
|
// which type is left for the compiler to chose, so do not let users try to
|
|
// tamper with that.
|
|
SayAlreadyDeclared(name, *symbol);
|
|
symbol = nullptr;
|
|
} else {
|
|
// Enumerators are treated as PARAMETER (section 7.6 paragraph (4))
|
|
symbol = &MakeSymbol(name, Attrs{Attr::PARAMETER}, ObjectEntityDetails{});
|
|
symbol->SetType(context().MakeNumericType(
|
|
TypeCategory::Integer, evaluate::CInteger::kind));
|
|
}
|
|
|
|
if (auto &init{std::get<std::optional<parser::ScalarIntConstantExpr>>(
|
|
enumerator.t)}) {
|
|
Walk(*init); // Resolve names in expression before evaluation.
|
|
MaybeIntExpr expr{EvaluateIntExpr(*init)};
|
|
if (auto value{evaluate::ToInt64(expr)}) {
|
|
// Cast all init expressions to C_INT so that they can then be
|
|
// safely incremented (see 7.6 Note 2).
|
|
enumerationState_.value = static_cast<int>(*value);
|
|
} else {
|
|
Say(name,
|
|
"Enumerator value could not be computed "
|
|
"from the given expression"_err_en_US);
|
|
// Prevent resolution of next enumerators value
|
|
enumerationState_.value = std::nullopt;
|
|
}
|
|
}
|
|
|
|
if (symbol) {
|
|
if (enumerationState_.value) {
|
|
symbol->get<ObjectEntityDetails>().set_init(SomeExpr{
|
|
evaluate::Expr<evaluate::CInteger>{*enumerationState_.value}});
|
|
} else {
|
|
context().SetError(*symbol);
|
|
}
|
|
}
|
|
|
|
if (enumerationState_.value) {
|
|
(*enumerationState_.value)++;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
void DeclarationVisitor::Post(const parser::EnumDef &) {
|
|
enumerationState_ = EnumeratorState{};
|
|
}
|
|
|
|
bool DeclarationVisitor::Pre(const parser::AccessSpec &x) {
|
|
Attr attr{AccessSpecToAttr(x)};
|
|
const Scope &scope{
|
|
currScope().IsDerivedType() ? currScope().parent() : currScope()};
|
|
if (!scope.IsModule()) { // C817
|
|
Say(currStmtSource().value(),
|
|
"%s attribute may only appear in the specification part of a module"_err_en_US,
|
|
EnumToString(attr));
|
|
}
|
|
CheckAndSet(attr);
|
|
return false;
|
|
}
|
|
|
|
bool DeclarationVisitor::Pre(const parser::AsynchronousStmt &x) {
|
|
return HandleAttributeStmt(Attr::ASYNCHRONOUS, x.v);
|
|
}
|
|
bool DeclarationVisitor::Pre(const parser::ContiguousStmt &x) {
|
|
return HandleAttributeStmt(Attr::CONTIGUOUS, x.v);
|
|
}
|
|
bool DeclarationVisitor::Pre(const parser::ExternalStmt &x) {
|
|
HandleAttributeStmt(Attr::EXTERNAL, x.v);
|
|
for (const auto &name : x.v) {
|
|
auto *symbol{FindSymbol(name)};
|
|
if (!ConvertToProcEntity(*symbol)) {
|
|
SayWithDecl(
|
|
name, *symbol, "EXTERNAL attribute not allowed on '%s'"_err_en_US);
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
bool DeclarationVisitor::Pre(const parser::IntentStmt &x) {
|
|
auto &intentSpec{std::get<parser::IntentSpec>(x.t)};
|
|
auto &names{std::get<std::list<parser::Name>>(x.t)};
|
|
return CheckNotInBlock("INTENT") && // C1107
|
|
HandleAttributeStmt(IntentSpecToAttr(intentSpec), names);
|
|
}
|
|
bool DeclarationVisitor::Pre(const parser::IntrinsicStmt &x) {
|
|
HandleAttributeStmt(Attr::INTRINSIC, x.v);
|
|
for (const auto &name : x.v) {
|
|
auto *symbol{FindSymbol(name)};
|
|
if (!ConvertToProcEntity(*symbol)) {
|
|
SayWithDecl(
|
|
name, *symbol, "INTRINSIC attribute not allowed on '%s'"_err_en_US);
|
|
} else if (symbol->attrs().test(Attr::EXTERNAL)) { // C840
|
|
Say(symbol->name(),
|
|
"Symbol '%s' cannot have both EXTERNAL and INTRINSIC attributes"_err_en_US,
|
|
symbol->name());
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
bool DeclarationVisitor::Pre(const parser::OptionalStmt &x) {
|
|
return CheckNotInBlock("OPTIONAL") && // C1107
|
|
HandleAttributeStmt(Attr::OPTIONAL, x.v);
|
|
}
|
|
bool DeclarationVisitor::Pre(const parser::ProtectedStmt &x) {
|
|
return HandleAttributeStmt(Attr::PROTECTED, x.v);
|
|
}
|
|
bool DeclarationVisitor::Pre(const parser::ValueStmt &x) {
|
|
return CheckNotInBlock("VALUE") && // C1107
|
|
HandleAttributeStmt(Attr::VALUE, x.v);
|
|
}
|
|
bool DeclarationVisitor::Pre(const parser::VolatileStmt &x) {
|
|
return HandleAttributeStmt(Attr::VOLATILE, x.v);
|
|
}
|
|
// Handle a statement that sets an attribute on a list of names.
|
|
bool DeclarationVisitor::HandleAttributeStmt(
|
|
Attr attr, const std::list<parser::Name> &names) {
|
|
for (const auto &name : names) {
|
|
HandleAttributeStmt(attr, name);
|
|
}
|
|
return false;
|
|
}
|
|
Symbol &DeclarationVisitor::HandleAttributeStmt(
|
|
Attr attr, const parser::Name &name) {
|
|
if (attr == Attr::INTRINSIC &&
|
|
!context().intrinsics().IsIntrinsic(name.source.ToString())) {
|
|
Say(name.source, "'%s' is not a known intrinsic procedure"_err_en_US);
|
|
}
|
|
auto *symbol{FindInScope(currScope(), name)};
|
|
if (attr == Attr::ASYNCHRONOUS || attr == Attr::VOLATILE) {
|
|
// these can be set on a symbol that is host-assoc or use-assoc
|
|
if (!symbol &&
|
|
(currScope().kind() == Scope::Kind::Subprogram ||
|
|
currScope().kind() == Scope::Kind::Block)) {
|
|
if (auto *hostSymbol{FindSymbol(name)}) {
|
|
name.symbol = nullptr;
|
|
symbol = &MakeSymbol(name, HostAssocDetails{*hostSymbol});
|
|
}
|
|
}
|
|
} else if (symbol && symbol->has<UseDetails>()) {
|
|
Say(currStmtSource().value(),
|
|
"Cannot change %s attribute on use-associated '%s'"_err_en_US,
|
|
EnumToString(attr), name.source);
|
|
return *symbol;
|
|
}
|
|
if (!symbol) {
|
|
symbol = &MakeSymbol(name, EntityDetails{});
|
|
}
|
|
symbol->attrs().set(attr);
|
|
symbol->attrs() = HandleSaveName(name.source, symbol->attrs());
|
|
return *symbol;
|
|
}
|
|
// C1107
|
|
bool DeclarationVisitor::CheckNotInBlock(const char *stmt) {
|
|
if (currScope().kind() == Scope::Kind::Block) {
|
|
Say(MessageFormattedText{
|
|
"%s statement is not allowed in a BLOCK construct"_err_en_US, stmt});
|
|
return false;
|
|
} else {
|
|
return true;
|
|
}
|
|
}
|
|
|
|
void DeclarationVisitor::Post(const parser::ObjectDecl &x) {
|
|
CHECK(objectDeclAttr_);
|
|
const auto &name{std::get<parser::ObjectName>(x.t)};
|
|
DeclareObjectEntity(name, Attrs{*objectDeclAttr_});
|
|
}
|
|
|
|
// Declare an entity not yet known to be an object or proc.
|
|
Symbol &DeclarationVisitor::DeclareUnknownEntity(
|
|
const parser::Name &name, Attrs attrs) {
|
|
if (!arraySpec().empty() || !coarraySpec().empty()) {
|
|
return DeclareObjectEntity(name, attrs);
|
|
} else {
|
|
Symbol &symbol{DeclareEntity<EntityDetails>(name, attrs)};
|
|
if (auto *type{GetDeclTypeSpec()}) {
|
|
SetType(name, *type);
|
|
}
|
|
charInfo_.length.reset();
|
|
SetBindNameOn(symbol);
|
|
if (symbol.attrs().test(Attr::EXTERNAL)) {
|
|
ConvertToProcEntity(symbol);
|
|
}
|
|
return symbol;
|
|
}
|
|
}
|
|
|
|
Symbol &DeclarationVisitor::DeclareProcEntity(
|
|
const parser::Name &name, Attrs attrs, const ProcInterface &interface) {
|
|
Symbol &symbol{DeclareEntity<ProcEntityDetails>(name, attrs)};
|
|
if (auto *details{symbol.detailsIf<ProcEntityDetails>()}) {
|
|
if (interface.type()) {
|
|
symbol.set(Symbol::Flag::Function);
|
|
} else if (interface.symbol()) {
|
|
if (interface.symbol()->test(Symbol::Flag::Function)) {
|
|
symbol.set(Symbol::Flag::Function);
|
|
} else if (interface.symbol()->test(Symbol::Flag::Subroutine)) {
|
|
symbol.set(Symbol::Flag::Subroutine);
|
|
}
|
|
}
|
|
details->set_interface(interface);
|
|
SetBindNameOn(symbol);
|
|
SetPassNameOn(symbol);
|
|
}
|
|
return symbol;
|
|
}
|
|
|
|
Symbol &DeclarationVisitor::DeclareObjectEntity(
|
|
const parser::Name &name, Attrs attrs) {
|
|
Symbol &symbol{DeclareEntity<ObjectEntityDetails>(name, attrs)};
|
|
if (auto *details{symbol.detailsIf<ObjectEntityDetails>()}) {
|
|
if (auto *type{GetDeclTypeSpec()}) {
|
|
SetType(name, *type);
|
|
}
|
|
if (!arraySpec().empty()) {
|
|
if (details->IsArray()) {
|
|
Say(name,
|
|
"The dimensions of '%s' have already been declared"_err_en_US);
|
|
context().SetError(symbol);
|
|
} else {
|
|
details->set_shape(arraySpec());
|
|
}
|
|
}
|
|
if (!coarraySpec().empty()) {
|
|
if (details->IsCoarray()) {
|
|
Say(name,
|
|
"The codimensions of '%s' have already been declared"_err_en_US);
|
|
context().SetError(symbol);
|
|
} else {
|
|
details->set_coshape(coarraySpec());
|
|
}
|
|
}
|
|
SetBindNameOn(symbol);
|
|
}
|
|
ClearArraySpec();
|
|
ClearCoarraySpec();
|
|
charInfo_.length.reset();
|
|
return symbol;
|
|
}
|
|
|
|
void DeclarationVisitor::Post(const parser::IntegerTypeSpec &x) {
|
|
SetDeclTypeSpec(MakeNumericType(TypeCategory::Integer, x.v));
|
|
}
|
|
void DeclarationVisitor::Post(const parser::IntrinsicTypeSpec::Real &x) {
|
|
SetDeclTypeSpec(MakeNumericType(TypeCategory::Real, x.kind));
|
|
}
|
|
void DeclarationVisitor::Post(const parser::IntrinsicTypeSpec::Complex &x) {
|
|
SetDeclTypeSpec(MakeNumericType(TypeCategory::Complex, x.kind));
|
|
}
|
|
void DeclarationVisitor::Post(const parser::IntrinsicTypeSpec::Logical &x) {
|
|
SetDeclTypeSpec(MakeLogicalType(x.kind));
|
|
}
|
|
void DeclarationVisitor::Post(const parser::IntrinsicTypeSpec::Character &) {
|
|
if (!charInfo_.length) {
|
|
charInfo_.length = ParamValue{1, common::TypeParamAttr::Len};
|
|
}
|
|
if (!charInfo_.kind) {
|
|
charInfo_.kind =
|
|
KindExpr{context().GetDefaultKind(TypeCategory::Character)};
|
|
}
|
|
SetDeclTypeSpec(currScope().MakeCharacterType(
|
|
std::move(*charInfo_.length), std::move(*charInfo_.kind)));
|
|
charInfo_ = {};
|
|
}
|
|
void DeclarationVisitor::Post(const parser::CharSelector::LengthAndKind &x) {
|
|
charInfo_.kind = EvaluateSubscriptIntExpr(x.kind);
|
|
std::optional<std::int64_t> intKind{ToInt64(charInfo_.kind)};
|
|
if (intKind &&
|
|
!evaluate::IsValidKindOfIntrinsicType(
|
|
TypeCategory::Character, *intKind)) { // C715, C719
|
|
Say(currStmtSource().value(),
|
|
"KIND value (%jd) not valid for CHARACTER"_err_en_US, *intKind);
|
|
}
|
|
if (x.length) {
|
|
charInfo_.length = GetParamValue(*x.length, common::TypeParamAttr::Len);
|
|
}
|
|
}
|
|
void DeclarationVisitor::Post(const parser::CharLength &x) {
|
|
if (const auto *length{std::get_if<std::uint64_t>(&x.u)}) {
|
|
charInfo_.length = ParamValue{
|
|
static_cast<ConstantSubscript>(*length), common::TypeParamAttr::Len};
|
|
} else {
|
|
charInfo_.length = GetParamValue(
|
|
std::get<parser::TypeParamValue>(x.u), common::TypeParamAttr::Len);
|
|
}
|
|
}
|
|
void DeclarationVisitor::Post(const parser::LengthSelector &x) {
|
|
if (const auto *param{std::get_if<parser::TypeParamValue>(&x.u)}) {
|
|
charInfo_.length = GetParamValue(*param, common::TypeParamAttr::Len);
|
|
}
|
|
}
|
|
|
|
bool DeclarationVisitor::Pre(const parser::KindParam &x) {
|
|
if (const auto *kind{std::get_if<
|
|
parser::Scalar<parser::Integer<parser::Constant<parser::Name>>>>(
|
|
&x.u)}) {
|
|
const parser::Name &name{kind->thing.thing.thing};
|
|
if (!FindSymbol(name)) {
|
|
Say(name, "Parameter '%s' not found"_err_en_US);
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|
|
bool DeclarationVisitor::Pre(const parser::DeclarationTypeSpec::Type &) {
|
|
CHECK(GetDeclTypeSpecCategory() == DeclTypeSpec::Category::TypeDerived);
|
|
return true;
|
|
}
|
|
|
|
void DeclarationVisitor::Post(const parser::DeclarationTypeSpec::Type &type) {
|
|
const parser::Name &derivedName{std::get<parser::Name>(type.derived.t)};
|
|
if (const Symbol * derivedSymbol{derivedName.symbol}) {
|
|
CheckForAbstractType(*derivedSymbol); // C706
|
|
}
|
|
}
|
|
|
|
bool DeclarationVisitor::Pre(const parser::DeclarationTypeSpec::Class &) {
|
|
SetDeclTypeSpecCategory(DeclTypeSpec::Category::ClassDerived);
|
|
return true;
|
|
}
|
|
|
|
void DeclarationVisitor::Post(
|
|
const parser::DeclarationTypeSpec::Class &parsedClass) {
|
|
const auto &typeName{std::get<parser::Name>(parsedClass.derived.t)};
|
|
if (auto spec{ResolveDerivedType(typeName)};
|
|
spec && !IsExtensibleType(&*spec)) { // C705
|
|
SayWithDecl(typeName, *typeName.symbol,
|
|
"Non-extensible derived type '%s' may not be used with CLASS"
|
|
" keyword"_err_en_US);
|
|
}
|
|
}
|
|
|
|
bool DeclarationVisitor::Pre(const parser::DeclarationTypeSpec::Record &) {
|
|
// TODO
|
|
return true;
|
|
}
|
|
|
|
void DeclarationVisitor::Post(const parser::DerivedTypeSpec &x) {
|
|
const auto &typeName{std::get<parser::Name>(x.t)};
|
|
auto spec{ResolveDerivedType(typeName)};
|
|
if (!spec) {
|
|
return;
|
|
}
|
|
bool seenAnyName{false};
|
|
for (const auto &typeParamSpec :
|
|
std::get<std::list<parser::TypeParamSpec>>(x.t)) {
|
|
const auto &optKeyword{
|
|
std::get<std::optional<parser::Keyword>>(typeParamSpec.t)};
|
|
std::optional<SourceName> name;
|
|
if (optKeyword) {
|
|
seenAnyName = true;
|
|
name = optKeyword->v.source;
|
|
} else if (seenAnyName) {
|
|
Say(typeName.source, "Type parameter value must have a name"_err_en_US);
|
|
continue;
|
|
}
|
|
const auto &value{std::get<parser::TypeParamValue>(typeParamSpec.t)};
|
|
// The expressions in a derived type specifier whose values define
|
|
// non-defaulted type parameters are evaluated (folded) in the enclosing
|
|
// scope. The KIND/LEN distinction is resolved later in
|
|
// DerivedTypeSpec::CookParameters().
|
|
ParamValue param{GetParamValue(value, common::TypeParamAttr::Kind)};
|
|
if (!param.isExplicit() || param.GetExplicit()) {
|
|
spec->AddRawParamValue(optKeyword, std::move(param));
|
|
}
|
|
}
|
|
|
|
// The DerivedTypeSpec *spec is used initially as a search key.
|
|
// If it turns out to have the same name and actual parameter
|
|
// value expressions as another DerivedTypeSpec in the current
|
|
// scope does, then we'll use that extant spec; otherwise, when this
|
|
// spec is distinct from all derived types previously instantiated
|
|
// in the current scope, this spec will be moved into that collection.
|
|
const auto &dtDetails{spec->typeSymbol().get<DerivedTypeDetails>()};
|
|
auto category{GetDeclTypeSpecCategory()};
|
|
if (dtDetails.isForwardReferenced()) {
|
|
DeclTypeSpec &type{currScope().MakeDerivedType(category, std::move(*spec))};
|
|
SetDeclTypeSpec(type);
|
|
return;
|
|
}
|
|
// Normalize parameters to produce a better search key.
|
|
spec->CookParameters(GetFoldingContext());
|
|
if (!spec->MightBeParameterized()) {
|
|
spec->EvaluateParameters(GetFoldingContext());
|
|
}
|
|
if (const DeclTypeSpec *
|
|
extant{currScope().FindInstantiatedDerivedType(*spec, category)}) {
|
|
// This derived type and parameter expressions (if any) are already present
|
|
// in this scope.
|
|
SetDeclTypeSpec(*extant);
|
|
} else {
|
|
DeclTypeSpec &type{currScope().MakeDerivedType(category, std::move(*spec))};
|
|
DerivedTypeSpec &derived{type.derivedTypeSpec()};
|
|
if (derived.MightBeParameterized() &&
|
|
currScope().IsParameterizedDerivedType()) {
|
|
// Defer instantiation; use the derived type's definition's scope.
|
|
derived.set_scope(DEREF(spec->typeSymbol().scope()));
|
|
} else {
|
|
auto restorer{
|
|
GetFoldingContext().messages().SetLocation(currStmtSource().value())};
|
|
derived.Instantiate(currScope(), context());
|
|
}
|
|
SetDeclTypeSpec(type);
|
|
}
|
|
// Capture the DerivedTypeSpec in the parse tree for use in building
|
|
// structure constructor expressions.
|
|
x.derivedTypeSpec = &GetDeclTypeSpec()->derivedTypeSpec();
|
|
}
|
|
|
|
// The descendents of DerivedTypeDef in the parse tree are visited directly
|
|
// in this Pre() routine so that recursive use of the derived type can be
|
|
// supported in the components.
|
|
bool DeclarationVisitor::Pre(const parser::DerivedTypeDef &x) {
|
|
auto &stmt{std::get<parser::Statement<parser::DerivedTypeStmt>>(x.t)};
|
|
Walk(stmt);
|
|
Walk(std::get<std::list<parser::Statement<parser::TypeParamDefStmt>>>(x.t));
|
|
auto &scope{currScope()};
|
|
CHECK(scope.symbol());
|
|
CHECK(scope.symbol()->scope() == &scope);
|
|
auto &details{scope.symbol()->get<DerivedTypeDetails>()};
|
|
std::set<SourceName> paramNames;
|
|
for (auto ¶mName : std::get<std::list<parser::Name>>(stmt.statement.t)) {
|
|
details.add_paramName(paramName.source);
|
|
auto *symbol{FindInScope(scope, paramName)};
|
|
if (!symbol) {
|
|
Say(paramName,
|
|
"No definition found for type parameter '%s'"_err_en_US); // C742
|
|
} else if (!symbol->has<TypeParamDetails>()) {
|
|
Say2(paramName, "'%s' is not defined as a type parameter"_err_en_US,
|
|
*symbol, "Definition of '%s'"_en_US); // C741
|
|
}
|
|
if (!paramNames.insert(paramName.source).second) {
|
|
Say(paramName,
|
|
"Duplicate type parameter name: '%s'"_err_en_US); // C731
|
|
}
|
|
}
|
|
for (const auto &[name, symbol] : currScope()) {
|
|
if (symbol->has<TypeParamDetails>() && !paramNames.count(name)) {
|
|
SayDerivedType(name,
|
|
"'%s' is not a type parameter of this derived type"_err_en_US,
|
|
currScope()); // C742
|
|
}
|
|
}
|
|
Walk(std::get<std::list<parser::Statement<parser::PrivateOrSequence>>>(x.t));
|
|
const auto &componentDefs{
|
|
std::get<std::list<parser::Statement<parser::ComponentDefStmt>>>(x.t)};
|
|
Walk(componentDefs);
|
|
if (derivedTypeInfo_.sequence) {
|
|
details.set_sequence(true);
|
|
if (componentDefs.empty()) { // C740
|
|
Say(stmt.source,
|
|
"A sequence type must have at least one component"_err_en_US);
|
|
}
|
|
if (!details.paramNames().empty()) { // C740
|
|
Say(stmt.source,
|
|
"A sequence type may not have type parameters"_err_en_US);
|
|
}
|
|
if (derivedTypeInfo_.extends) { // C735
|
|
Say(stmt.source,
|
|
"A sequence type may not have the EXTENDS attribute"_err_en_US);
|
|
} else {
|
|
for (const auto &componentName : details.componentNames()) {
|
|
const Symbol *componentSymbol{scope.FindComponent(componentName)};
|
|
if (componentSymbol && componentSymbol->has<ObjectEntityDetails>()) {
|
|
const auto &componentDetails{
|
|
componentSymbol->get<ObjectEntityDetails>()};
|
|
const DeclTypeSpec *componentType{componentDetails.type()};
|
|
if (componentType && // C740
|
|
!componentType->AsIntrinsic() &&
|
|
!componentType->IsSequenceType()) {
|
|
Say(componentSymbol->name(),
|
|
"A sequence type data component must either be of an"
|
|
" intrinsic type or a derived sequence type"_err_en_US);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
Walk(std::get<std::optional<parser::TypeBoundProcedurePart>>(x.t));
|
|
Walk(std::get<parser::Statement<parser::EndTypeStmt>>(x.t));
|
|
derivedTypeInfo_ = {};
|
|
PopScope();
|
|
return false;
|
|
}
|
|
bool DeclarationVisitor::Pre(const parser::DerivedTypeStmt &) {
|
|
return BeginAttrs();
|
|
}
|
|
void DeclarationVisitor::Post(const parser::DerivedTypeStmt &x) {
|
|
auto &name{std::get<parser::Name>(x.t)};
|
|
// Resolve the EXTENDS() clause before creating the derived
|
|
// type's symbol to foil attempts to recursively extend a type.
|
|
auto *extendsName{derivedTypeInfo_.extends};
|
|
std::optional<DerivedTypeSpec> extendsType{
|
|
ResolveExtendsType(name, extendsName)};
|
|
auto &symbol{MakeSymbol(name, GetAttrs(), DerivedTypeDetails{})};
|
|
symbol.ReplaceName(name.source);
|
|
derivedTypeInfo_.type = &symbol;
|
|
PushScope(Scope::Kind::DerivedType, &symbol);
|
|
if (extendsType) {
|
|
// Declare the "parent component"; private if the type is.
|
|
// Any symbol stored in the EXTENDS() clause is temporarily
|
|
// hidden so that a new symbol can be created for the parent
|
|
// component without producing spurious errors about already
|
|
// existing.
|
|
const Symbol &extendsSymbol{extendsType->typeSymbol()};
|
|
auto restorer{common::ScopedSet(extendsName->symbol, nullptr)};
|
|
if (OkToAddComponent(*extendsName, &extendsSymbol)) {
|
|
auto &comp{DeclareEntity<ObjectEntityDetails>(*extendsName, Attrs{})};
|
|
comp.attrs().set(
|
|
Attr::PRIVATE, extendsSymbol.attrs().test(Attr::PRIVATE));
|
|
comp.set(Symbol::Flag::ParentComp);
|
|
DeclTypeSpec &type{currScope().MakeDerivedType(
|
|
DeclTypeSpec::TypeDerived, std::move(*extendsType))};
|
|
type.derivedTypeSpec().set_scope(*extendsSymbol.scope());
|
|
comp.SetType(type);
|
|
DerivedTypeDetails &details{symbol.get<DerivedTypeDetails>()};
|
|
details.add_component(comp);
|
|
}
|
|
}
|
|
EndAttrs();
|
|
}
|
|
|
|
void DeclarationVisitor::Post(const parser::TypeParamDefStmt &x) {
|
|
auto *type{GetDeclTypeSpec()};
|
|
auto attr{std::get<common::TypeParamAttr>(x.t)};
|
|
for (auto &decl : std::get<std::list<parser::TypeParamDecl>>(x.t)) {
|
|
auto &name{std::get<parser::Name>(decl.t)};
|
|
if (Symbol * symbol{MakeTypeSymbol(name, TypeParamDetails{attr})}) {
|
|
SetType(name, *type);
|
|
if (auto &init{
|
|
std::get<std::optional<parser::ScalarIntConstantExpr>>(decl.t)}) {
|
|
if (auto maybeExpr{EvaluateConvertedExpr(
|
|
*symbol, *init, init->thing.thing.thing.value().source)}) {
|
|
auto *intExpr{std::get_if<SomeIntExpr>(&maybeExpr->u)};
|
|
CHECK(intExpr);
|
|
symbol->get<TypeParamDetails>().set_init(std::move(*intExpr));
|
|
}
|
|
}
|
|
}
|
|
}
|
|
EndDecl();
|
|
}
|
|
bool DeclarationVisitor::Pre(const parser::TypeAttrSpec::Extends &x) {
|
|
if (derivedTypeInfo_.extends) {
|
|
Say(currStmtSource().value(),
|
|
"Attribute 'EXTENDS' cannot be used more than once"_err_en_US);
|
|
} else {
|
|
derivedTypeInfo_.extends = &x.v;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
bool DeclarationVisitor::Pre(const parser::PrivateStmt &) {
|
|
if (!currScope().parent().IsModule()) {
|
|
Say("PRIVATE is only allowed in a derived type that is"
|
|
" in a module"_err_en_US); // C766
|
|
} else if (derivedTypeInfo_.sawContains) {
|
|
derivedTypeInfo_.privateBindings = true;
|
|
} else if (!derivedTypeInfo_.privateComps) {
|
|
derivedTypeInfo_.privateComps = true;
|
|
} else {
|
|
Say("PRIVATE may not appear more than once in"
|
|
" derived type components"_en_US); // C738
|
|
}
|
|
return false;
|
|
}
|
|
bool DeclarationVisitor::Pre(const parser::SequenceStmt &) {
|
|
if (derivedTypeInfo_.sequence) {
|
|
Say("SEQUENCE may not appear more than once in"
|
|
" derived type components"_en_US); // C738
|
|
}
|
|
derivedTypeInfo_.sequence = true;
|
|
return false;
|
|
}
|
|
void DeclarationVisitor::Post(const parser::ComponentDecl &x) {
|
|
const auto &name{std::get<parser::Name>(x.t)};
|
|
auto attrs{GetAttrs()};
|
|
if (derivedTypeInfo_.privateComps &&
|
|
!attrs.HasAny({Attr::PUBLIC, Attr::PRIVATE})) {
|
|
attrs.set(Attr::PRIVATE);
|
|
}
|
|
if (!attrs.HasAny({Attr::POINTER, Attr::ALLOCATABLE})) {
|
|
if (const auto *declType{GetDeclTypeSpec()}) {
|
|
if (const auto *derived{declType->AsDerived()}) {
|
|
if (derivedTypeInfo_.type == &derived->typeSymbol()) { // C744
|
|
Say("Recursive use of the derived type requires "
|
|
"POINTER or ALLOCATABLE"_err_en_US);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
if (OkToAddComponent(name)) {
|
|
auto &symbol{DeclareObjectEntity(name, attrs)};
|
|
if (symbol.has<ObjectEntityDetails>()) {
|
|
if (auto &init{std::get<std::optional<parser::Initialization>>(x.t)}) {
|
|
Initialization(name, *init, true);
|
|
}
|
|
}
|
|
currScope().symbol()->get<DerivedTypeDetails>().add_component(symbol);
|
|
}
|
|
ClearArraySpec();
|
|
ClearCoarraySpec();
|
|
}
|
|
bool DeclarationVisitor::Pre(const parser::ProcedureDeclarationStmt &) {
|
|
CHECK(!interfaceName_);
|
|
return BeginDecl();
|
|
}
|
|
void DeclarationVisitor::Post(const parser::ProcedureDeclarationStmt &) {
|
|
interfaceName_ = nullptr;
|
|
EndDecl();
|
|
}
|
|
bool DeclarationVisitor::Pre(const parser::DataComponentDefStmt &x) {
|
|
// Overrides parse tree traversal so as to handle attributes first,
|
|
// so POINTER & ALLOCATABLE enable forward references to derived types.
|
|
Walk(std::get<std::list<parser::ComponentAttrSpec>>(x.t));
|
|
set_allowForwardReferenceToDerivedType(
|
|
GetAttrs().HasAny({Attr::POINTER, Attr::ALLOCATABLE}));
|
|
Walk(std::get<parser::DeclarationTypeSpec>(x.t));
|
|
set_allowForwardReferenceToDerivedType(false);
|
|
Walk(std::get<std::list<parser::ComponentDecl>>(x.t));
|
|
return false;
|
|
}
|
|
bool DeclarationVisitor::Pre(const parser::ProcComponentDefStmt &) {
|
|
CHECK(!interfaceName_);
|
|
return true;
|
|
}
|
|
void DeclarationVisitor::Post(const parser::ProcComponentDefStmt &) {
|
|
interfaceName_ = nullptr;
|
|
}
|
|
bool DeclarationVisitor::Pre(const parser::ProcPointerInit &x) {
|
|
if (auto *name{std::get_if<parser::Name>(&x.u)}) {
|
|
return !NameIsKnownOrIntrinsic(*name);
|
|
}
|
|
return true;
|
|
}
|
|
void DeclarationVisitor::Post(const parser::ProcInterface &x) {
|
|
if (auto *name{std::get_if<parser::Name>(&x.u)}) {
|
|
interfaceName_ = name;
|
|
NoteInterfaceName(*name);
|
|
}
|
|
}
|
|
|
|
void DeclarationVisitor::Post(const parser::ProcDecl &x) {
|
|
const auto &name{std::get<parser::Name>(x.t)};
|
|
ProcInterface interface;
|
|
if (interfaceName_) {
|
|
interface.set_symbol(*interfaceName_->symbol);
|
|
} else if (auto *type{GetDeclTypeSpec()}) {
|
|
interface.set_type(*type);
|
|
}
|
|
auto attrs{HandleSaveName(name.source, GetAttrs())};
|
|
DerivedTypeDetails *dtDetails{nullptr};
|
|
if (Symbol * symbol{currScope().symbol()}) {
|
|
dtDetails = symbol->detailsIf<DerivedTypeDetails>();
|
|
}
|
|
if (!dtDetails) {
|
|
attrs.set(Attr::EXTERNAL);
|
|
}
|
|
Symbol &symbol{DeclareProcEntity(name, attrs, interface)};
|
|
symbol.ReplaceName(name.source);
|
|
if (dtDetails) {
|
|
dtDetails->add_component(symbol);
|
|
}
|
|
}
|
|
|
|
bool DeclarationVisitor::Pre(const parser::TypeBoundProcedurePart &) {
|
|
derivedTypeInfo_.sawContains = true;
|
|
return true;
|
|
}
|
|
|
|
// Resolve binding names from type-bound generics, saved in genericBindings_.
|
|
void DeclarationVisitor::Post(const parser::TypeBoundProcedurePart &) {
|
|
// track specifics seen for the current generic to detect duplicates:
|
|
const Symbol *currGeneric{nullptr};
|
|
std::set<SourceName> specifics;
|
|
for (const auto &[generic, bindingName] : genericBindings_) {
|
|
if (generic != currGeneric) {
|
|
currGeneric = generic;
|
|
specifics.clear();
|
|
}
|
|
auto [it, inserted]{specifics.insert(bindingName->source)};
|
|
if (!inserted) {
|
|
Say(*bindingName, // C773
|
|
"Binding name '%s' was already specified for generic '%s'"_err_en_US,
|
|
bindingName->source, generic->name())
|
|
.Attach(*it, "Previous specification of '%s'"_en_US, *it);
|
|
continue;
|
|
}
|
|
auto *symbol{FindInTypeOrParents(*bindingName)};
|
|
if (!symbol) {
|
|
Say(*bindingName, // C772
|
|
"Binding name '%s' not found in this derived type"_err_en_US);
|
|
} else if (!symbol->has<ProcBindingDetails>()) {
|
|
SayWithDecl(*bindingName, *symbol, // C772
|
|
"'%s' is not the name of a specific binding of this type"_err_en_US);
|
|
} else {
|
|
generic->get<GenericDetails>().AddSpecificProc(
|
|
*symbol, bindingName->source);
|
|
}
|
|
}
|
|
genericBindings_.clear();
|
|
}
|
|
|
|
void DeclarationVisitor::Post(const parser::ContainsStmt &) {
|
|
if (derivedTypeInfo_.sequence) {
|
|
Say("A sequence type may not have a CONTAINS statement"_err_en_US); // C740
|
|
}
|
|
}
|
|
|
|
void DeclarationVisitor::Post(
|
|
const parser::TypeBoundProcedureStmt::WithoutInterface &x) {
|
|
if (GetAttrs().test(Attr::DEFERRED)) { // C783
|
|
Say("DEFERRED is only allowed when an interface-name is provided"_err_en_US);
|
|
}
|
|
for (auto &declaration : x.declarations) {
|
|
auto &bindingName{std::get<parser::Name>(declaration.t)};
|
|
auto &optName{std::get<std::optional<parser::Name>>(declaration.t)};
|
|
const parser::Name &procedureName{optName ? *optName : bindingName};
|
|
Symbol *procedure{FindSymbol(procedureName)};
|
|
if (!procedure) {
|
|
procedure = NoteInterfaceName(procedureName);
|
|
}
|
|
if (auto *s{MakeTypeSymbol(bindingName, ProcBindingDetails{*procedure})}) {
|
|
SetPassNameOn(*s);
|
|
if (GetAttrs().test(Attr::DEFERRED)) {
|
|
context().SetError(*s);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
void DeclarationVisitor::CheckBindings(
|
|
const parser::TypeBoundProcedureStmt::WithoutInterface &tbps) {
|
|
CHECK(currScope().IsDerivedType());
|
|
for (auto &declaration : tbps.declarations) {
|
|
auto &bindingName{std::get<parser::Name>(declaration.t)};
|
|
if (Symbol * binding{FindInScope(currScope(), bindingName)}) {
|
|
if (auto *details{binding->detailsIf<ProcBindingDetails>()}) {
|
|
const Symbol *procedure{FindSubprogram(details->symbol())};
|
|
if (!CanBeTypeBoundProc(procedure)) {
|
|
if (details->symbol().name() != binding->name()) {
|
|
Say(binding->name(),
|
|
"The binding of '%s' ('%s') must be either an accessible "
|
|
"module procedure or an external procedure with "
|
|
"an explicit interface"_err_en_US,
|
|
binding->name(), details->symbol().name());
|
|
} else {
|
|
Say(binding->name(),
|
|
"'%s' must be either an accessible module procedure "
|
|
"or an external procedure with an explicit interface"_err_en_US,
|
|
binding->name());
|
|
}
|
|
context().SetError(*binding);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
void DeclarationVisitor::Post(
|
|
const parser::TypeBoundProcedureStmt::WithInterface &x) {
|
|
if (!GetAttrs().test(Attr::DEFERRED)) { // C783
|
|
Say("DEFERRED is required when an interface-name is provided"_err_en_US);
|
|
}
|
|
if (Symbol * interface{NoteInterfaceName(x.interfaceName)}) {
|
|
for (auto &bindingName : x.bindingNames) {
|
|
if (auto *s{
|
|
MakeTypeSymbol(bindingName, ProcBindingDetails{*interface})}) {
|
|
SetPassNameOn(*s);
|
|
if (!GetAttrs().test(Attr::DEFERRED)) {
|
|
context().SetError(*s);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
void DeclarationVisitor::Post(const parser::FinalProcedureStmt &x) {
|
|
for (auto &name : x.v) {
|
|
MakeTypeSymbol(name, FinalProcDetails{});
|
|
}
|
|
}
|
|
|
|
bool DeclarationVisitor::Pre(const parser::TypeBoundGenericStmt &x) {
|
|
const auto &accessSpec{std::get<std::optional<parser::AccessSpec>>(x.t)};
|
|
const auto &genericSpec{std::get<Indirection<parser::GenericSpec>>(x.t)};
|
|
const auto &bindingNames{std::get<std::list<parser::Name>>(x.t)};
|
|
auto info{GenericSpecInfo{genericSpec.value()}};
|
|
SourceName symbolName{info.symbolName()};
|
|
bool isPrivate{accessSpec ? accessSpec->v == parser::AccessSpec::Kind::Private
|
|
: derivedTypeInfo_.privateBindings};
|
|
auto *genericSymbol{info.FindInScope(context(), currScope())};
|
|
if (genericSymbol) {
|
|
if (!genericSymbol->has<GenericDetails>()) {
|
|
genericSymbol = nullptr; // MakeTypeSymbol will report the error below
|
|
}
|
|
} else {
|
|
// look in parent types:
|
|
Symbol *inheritedSymbol{nullptr};
|
|
for (const auto &name : info.GetAllNames(context())) {
|
|
inheritedSymbol = currScope().FindComponent(SourceName{name});
|
|
if (inheritedSymbol) {
|
|
break;
|
|
}
|
|
}
|
|
if (inheritedSymbol && inheritedSymbol->has<GenericDetails>()) {
|
|
CheckAccessibility(symbolName, isPrivate, *inheritedSymbol); // C771
|
|
}
|
|
}
|
|
if (genericSymbol) {
|
|
CheckAccessibility(symbolName, isPrivate, *genericSymbol); // C771
|
|
} else {
|
|
genericSymbol = MakeTypeSymbol(symbolName, GenericDetails{});
|
|
if (!genericSymbol) {
|
|
return false;
|
|
}
|
|
if (isPrivate) {
|
|
genericSymbol->attrs().set(Attr::PRIVATE);
|
|
}
|
|
}
|
|
for (const parser::Name &bindingName : bindingNames) {
|
|
genericBindings_.emplace(genericSymbol, &bindingName);
|
|
}
|
|
info.Resolve(genericSymbol);
|
|
return false;
|
|
}
|
|
|
|
bool DeclarationVisitor::Pre(const parser::AllocateStmt &) {
|
|
BeginDeclTypeSpec();
|
|
return true;
|
|
}
|
|
void DeclarationVisitor::Post(const parser::AllocateStmt &) {
|
|
EndDeclTypeSpec();
|
|
}
|
|
|
|
bool DeclarationVisitor::Pre(const parser::StructureConstructor &x) {
|
|
auto &parsedType{std::get<parser::DerivedTypeSpec>(x.t)};
|
|
const DeclTypeSpec *type{ProcessTypeSpec(parsedType)};
|
|
if (!type) {
|
|
return false;
|
|
}
|
|
const DerivedTypeSpec *spec{type->AsDerived()};
|
|
const Scope *typeScope{spec ? spec->scope() : nullptr};
|
|
if (!typeScope) {
|
|
return false;
|
|
}
|
|
|
|
// N.B C7102 is implicitly enforced by having inaccessible types not
|
|
// being found in resolution.
|
|
// More constraints are enforced in expression.cpp so that they
|
|
// can apply to structure constructors that have been converted
|
|
// from misparsed function references.
|
|
for (const auto &component :
|
|
std::get<std::list<parser::ComponentSpec>>(x.t)) {
|
|
// Visit the component spec expression, but not the keyword, since
|
|
// we need to resolve its symbol in the scope of the derived type.
|
|
Walk(std::get<parser::ComponentDataSource>(component.t));
|
|
if (const auto &kw{std::get<std::optional<parser::Keyword>>(component.t)}) {
|
|
FindInTypeOrParents(*typeScope, kw->v);
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|
|
bool DeclarationVisitor::Pre(const parser::BasedPointerStmt &x) {
|
|
for (const parser::BasedPointer &bp : x.v) {
|
|
const parser::ObjectName &pointerName{std::get<0>(bp.t)};
|
|
const parser::ObjectName &pointeeName{std::get<1>(bp.t)};
|
|
auto *pointer{FindSymbol(pointerName)};
|
|
if (!pointer) {
|
|
pointer = &MakeSymbol(pointerName, ObjectEntityDetails{});
|
|
} else if (!ConvertToObjectEntity(*pointer) || IsNamedConstant(*pointer)) {
|
|
SayWithDecl(pointerName, *pointer, "'%s' is not a variable"_err_en_US);
|
|
} else if (pointer->Rank() > 0) {
|
|
SayWithDecl(pointerName, *pointer,
|
|
"Cray pointer '%s' must be a scalar"_err_en_US);
|
|
} else if (pointer->test(Symbol::Flag::CrayPointee)) {
|
|
Say(pointerName,
|
|
"'%s' cannot be a Cray pointer as it is already a Cray pointee"_err_en_US);
|
|
}
|
|
pointer->set(Symbol::Flag::CrayPointer);
|
|
const DeclTypeSpec &pointerType{MakeNumericType(TypeCategory::Integer,
|
|
context().defaultKinds().subscriptIntegerKind())};
|
|
const auto *type{pointer->GetType()};
|
|
if (!type) {
|
|
pointer->SetType(pointerType);
|
|
} else if (*type != pointerType) {
|
|
Say(pointerName.source, "Cray pointer '%s' must have type %s"_err_en_US,
|
|
pointerName.source, pointerType.AsFortran());
|
|
}
|
|
if (ResolveName(pointeeName)) {
|
|
Symbol &pointee{*pointeeName.symbol};
|
|
if (pointee.has<UseDetails>()) {
|
|
Say(pointeeName,
|
|
"'%s' cannot be a Cray pointee as it is use-associated"_err_en_US);
|
|
continue;
|
|
} else if (!ConvertToObjectEntity(pointee) || IsNamedConstant(pointee)) {
|
|
Say(pointeeName, "'%s' is not a variable"_err_en_US);
|
|
continue;
|
|
} else if (pointee.test(Symbol::Flag::CrayPointer)) {
|
|
Say(pointeeName,
|
|
"'%s' cannot be a Cray pointee as it is already a Cray pointer"_err_en_US);
|
|
} else if (pointee.test(Symbol::Flag::CrayPointee)) {
|
|
Say(pointeeName,
|
|
"'%s' was already declared as a Cray pointee"_err_en_US);
|
|
} else {
|
|
pointee.set(Symbol::Flag::CrayPointee);
|
|
}
|
|
if (const auto *pointeeType{pointee.GetType()}) {
|
|
if (const auto *derived{pointeeType->AsDerived()}) {
|
|
if (!derived->typeSymbol().get<DerivedTypeDetails>().sequence()) {
|
|
Say(pointeeName,
|
|
"Type of Cray pointee '%s' is a non-sequence derived type"_err_en_US);
|
|
}
|
|
}
|
|
}
|
|
// process the pointee array-spec, if present
|
|
BeginArraySpec();
|
|
Walk(std::get<std::optional<parser::ArraySpec>>(bp.t));
|
|
const auto &spec{arraySpec()};
|
|
if (!spec.empty()) {
|
|
auto &details{pointee.get<ObjectEntityDetails>()};
|
|
if (details.shape().empty()) {
|
|
details.set_shape(spec);
|
|
} else {
|
|
SayWithDecl(pointeeName, pointee,
|
|
"Array spec was already declared for '%s'"_err_en_US);
|
|
}
|
|
}
|
|
ClearArraySpec();
|
|
currScope().add_crayPointer(pointeeName.source, *pointer);
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|
|
bool DeclarationVisitor::Pre(const parser::NamelistStmt::Group &x) {
|
|
if (!CheckNotInBlock("NAMELIST")) { // C1107
|
|
return false;
|
|
}
|
|
|
|
NamelistDetails details;
|
|
for (const auto &name : std::get<std::list<parser::Name>>(x.t)) {
|
|
auto *symbol{FindSymbol(name)};
|
|
if (!symbol) {
|
|
symbol = &MakeSymbol(name, ObjectEntityDetails{});
|
|
ApplyImplicitRules(*symbol);
|
|
} else if (!ConvertToObjectEntity(*symbol)) {
|
|
SayWithDecl(name, *symbol, "'%s' is not a variable"_err_en_US);
|
|
}
|
|
details.add_object(*symbol);
|
|
}
|
|
|
|
const auto &groupName{std::get<parser::Name>(x.t)};
|
|
auto *groupSymbol{FindInScope(currScope(), groupName)};
|
|
if (!groupSymbol || !groupSymbol->has<NamelistDetails>()) {
|
|
groupSymbol = &MakeSymbol(groupName, std::move(details));
|
|
groupSymbol->ReplaceName(groupName.source);
|
|
}
|
|
groupSymbol->get<NamelistDetails>().add_objects(details.objects());
|
|
return false;
|
|
}
|
|
|
|
bool DeclarationVisitor::Pre(const parser::IoControlSpec &x) {
|
|
if (const auto *name{std::get_if<parser::Name>(&x.u)}) {
|
|
auto *symbol{FindSymbol(*name)};
|
|
if (!symbol) {
|
|
Say(*name, "Namelist group '%s' not found"_err_en_US);
|
|
} else if (!symbol->GetUltimate().has<NamelistDetails>()) {
|
|
SayWithDecl(
|
|
*name, *symbol, "'%s' is not the name of a namelist group"_err_en_US);
|
|
}
|
|
}
|
|
return true;
|
|
}
|
|
|
|
bool DeclarationVisitor::Pre(const parser::CommonStmt::Block &x) {
|
|
CheckNotInBlock("COMMON"); // C1107
|
|
const auto &optName{std::get<std::optional<parser::Name>>(x.t)};
|
|
parser::Name blankCommon;
|
|
blankCommon.source =
|
|
SourceName{currStmtSource().value().begin(), std::size_t{0}};
|
|
CHECK(!commonBlockInfo_.curr);
|
|
commonBlockInfo_.curr =
|
|
&MakeCommonBlockSymbol(optName ? *optName : blankCommon);
|
|
return true;
|
|
}
|
|
|
|
void DeclarationVisitor::Post(const parser::CommonStmt::Block &) {
|
|
commonBlockInfo_.curr = nullptr;
|
|
}
|
|
|
|
bool DeclarationVisitor::Pre(const parser::CommonBlockObject &) {
|
|
BeginArraySpec();
|
|
return true;
|
|
}
|
|
|
|
void DeclarationVisitor::Post(const parser::CommonBlockObject &x) {
|
|
CHECK(commonBlockInfo_.curr);
|
|
const auto &name{std::get<parser::Name>(x.t)};
|
|
auto &symbol{DeclareObjectEntity(name, Attrs{})};
|
|
ClearArraySpec();
|
|
ClearCoarraySpec();
|
|
auto *details{symbol.detailsIf<ObjectEntityDetails>()};
|
|
if (!details) {
|
|
return; // error was reported
|
|
}
|
|
commonBlockInfo_.curr->get<CommonBlockDetails>().add_object(symbol);
|
|
auto pair{commonBlockInfo_.names.insert(name.source)};
|
|
if (!pair.second) {
|
|
const SourceName &prev{*pair.first};
|
|
Say2(name.source, "'%s' is already in a COMMON block"_err_en_US, prev,
|
|
"Previous occurrence of '%s' in a COMMON block"_en_US);
|
|
return;
|
|
}
|
|
details->set_commonBlock(*commonBlockInfo_.curr);
|
|
}
|
|
|
|
bool DeclarationVisitor::Pre(const parser::EquivalenceStmt &x) {
|
|
// save equivalence sets to be processed after specification part
|
|
CheckNotInBlock("EQUIVALENCE"); // C1107
|
|
for (const std::list<parser::EquivalenceObject> &set : x.v) {
|
|
equivalenceSets_.push_back(&set);
|
|
}
|
|
return false; // don't implicitly declare names yet
|
|
}
|
|
|
|
void DeclarationVisitor::CheckEquivalenceSets() {
|
|
EquivalenceSets equivSets{context()};
|
|
for (const auto *set : equivalenceSets_) {
|
|
const auto &source{set->front().v.value().source};
|
|
if (set->size() <= 1) { // R871
|
|
Say(source, "Equivalence set must have more than one object"_err_en_US);
|
|
}
|
|
for (const parser::EquivalenceObject &object : *set) {
|
|
const auto &designator{object.v.value()};
|
|
// The designator was not resolved when it was encountered so do it now.
|
|
// AnalyzeExpr causes array sections to be changed to substrings as needed
|
|
Walk(designator);
|
|
if (AnalyzeExpr(context(), designator)) {
|
|
equivSets.AddToSet(designator);
|
|
}
|
|
}
|
|
equivSets.FinishSet(source);
|
|
}
|
|
for (auto &set : equivSets.sets()) {
|
|
if (!set.empty()) {
|
|
currScope().add_equivalenceSet(std::move(set));
|
|
}
|
|
}
|
|
equivalenceSets_.clear();
|
|
}
|
|
|
|
bool DeclarationVisitor::Pre(const parser::SaveStmt &x) {
|
|
if (x.v.empty()) {
|
|
saveInfo_.saveAll = currStmtSource();
|
|
} else {
|
|
for (const parser::SavedEntity &y : x.v) {
|
|
auto kind{std::get<parser::SavedEntity::Kind>(y.t)};
|
|
const auto &name{std::get<parser::Name>(y.t)};
|
|
if (kind == parser::SavedEntity::Kind::Common) {
|
|
MakeCommonBlockSymbol(name);
|
|
AddSaveName(saveInfo_.commons, name.source);
|
|
} else {
|
|
HandleAttributeStmt(Attr::SAVE, name);
|
|
}
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|
|
void DeclarationVisitor::CheckSaveStmts() {
|
|
for (const SourceName &name : saveInfo_.entities) {
|
|
auto *symbol{FindInScope(currScope(), name)};
|
|
if (!symbol) {
|
|
// error was reported
|
|
} else if (saveInfo_.saveAll) {
|
|
// C889 - note that pgi, ifort, xlf do not enforce this constraint
|
|
Say2(name,
|
|
"Explicit SAVE of '%s' is redundant due to global SAVE statement"_err_en_US,
|
|
*saveInfo_.saveAll, "Global SAVE statement"_en_US);
|
|
} else if (auto msg{CheckSaveAttr(*symbol)}) {
|
|
Say(name, std::move(*msg));
|
|
} else {
|
|
SetSaveAttr(*symbol);
|
|
}
|
|
}
|
|
for (const SourceName &name : saveInfo_.commons) {
|
|
if (auto *symbol{currScope().FindCommonBlock(name)}) {
|
|
auto &objects{symbol->get<CommonBlockDetails>().objects()};
|
|
if (objects.empty()) {
|
|
if (currScope().kind() != Scope::Kind::Block) {
|
|
Say(name,
|
|
"'%s' appears as a COMMON block in a SAVE statement but not in"
|
|
" a COMMON statement"_err_en_US);
|
|
} else { // C1108
|
|
Say(name,
|
|
"SAVE statement in BLOCK construct may not contain a"
|
|
" common block name '%s'"_err_en_US);
|
|
}
|
|
} else {
|
|
for (const Symbol &object :
|
|
symbol->get<CommonBlockDetails>().objects()) {
|
|
SetSaveAttr(*const_cast<Symbol *>(&object));
|
|
}
|
|
}
|
|
}
|
|
}
|
|
if (saveInfo_.saveAll) {
|
|
// Apply SAVE attribute to applicable symbols
|
|
for (auto pair : currScope()) {
|
|
auto &symbol{*pair.second};
|
|
if (!CheckSaveAttr(symbol)) {
|
|
SetSaveAttr(symbol);
|
|
}
|
|
}
|
|
}
|
|
saveInfo_ = {};
|
|
}
|
|
|
|
// If SAVE attribute can't be set on symbol, return error message.
|
|
std::optional<MessageFixedText> DeclarationVisitor::CheckSaveAttr(
|
|
const Symbol &symbol) {
|
|
if (symbol.IsDummy()) {
|
|
return "SAVE attribute may not be applied to dummy argument '%s'"_err_en_US;
|
|
} else if (symbol.IsFuncResult()) {
|
|
return "SAVE attribute may not be applied to function result '%s'"_err_en_US;
|
|
} else if (symbol.has<ProcEntityDetails>() &&
|
|
!symbol.attrs().test(Attr::POINTER)) {
|
|
return "Procedure '%s' with SAVE attribute must also have POINTER attribute"_err_en_US;
|
|
} else {
|
|
return std::nullopt;
|
|
}
|
|
}
|
|
|
|
// Instead of setting SAVE attribute, record the name in saveInfo_.entities.
|
|
Attrs DeclarationVisitor::HandleSaveName(const SourceName &name, Attrs attrs) {
|
|
if (attrs.test(Attr::SAVE)) {
|
|
attrs.set(Attr::SAVE, false);
|
|
AddSaveName(saveInfo_.entities, name);
|
|
}
|
|
return attrs;
|
|
}
|
|
|
|
// Record a name in a set of those to be saved.
|
|
void DeclarationVisitor::AddSaveName(
|
|
std::set<SourceName> &set, const SourceName &name) {
|
|
auto pair{set.insert(name)};
|
|
if (!pair.second) {
|
|
Say2(name, "SAVE attribute was already specified on '%s'"_err_en_US,
|
|
*pair.first, "Previous specification of SAVE attribute"_en_US);
|
|
}
|
|
}
|
|
|
|
// Set the SAVE attribute on symbol unless it is implicitly saved anyway.
|
|
void DeclarationVisitor::SetSaveAttr(Symbol &symbol) {
|
|
if (!IsSaved(symbol)) {
|
|
symbol.attrs().set(Attr::SAVE);
|
|
}
|
|
}
|
|
|
|
// Check types of common block objects, now that they are known.
|
|
void DeclarationVisitor::CheckCommonBlocks() {
|
|
// check for empty common blocks
|
|
for (const auto &pair : currScope().commonBlocks()) {
|
|
const auto &symbol{*pair.second};
|
|
if (symbol.get<CommonBlockDetails>().objects().empty() &&
|
|
symbol.attrs().test(Attr::BIND_C)) {
|
|
Say(symbol.name(),
|
|
"'%s' appears as a COMMON block in a BIND statement but not in"
|
|
" a COMMON statement"_err_en_US);
|
|
}
|
|
}
|
|
// check objects in common blocks
|
|
for (const auto &name : commonBlockInfo_.names) {
|
|
const auto *symbol{currScope().FindSymbol(name)};
|
|
if (!symbol) {
|
|
continue;
|
|
}
|
|
const auto &attrs{symbol->attrs()};
|
|
if (attrs.test(Attr::ALLOCATABLE)) {
|
|
Say(name,
|
|
"ALLOCATABLE object '%s' may not appear in a COMMON block"_err_en_US);
|
|
} else if (attrs.test(Attr::BIND_C)) {
|
|
Say(name,
|
|
"Variable '%s' with BIND attribute may not appear in a COMMON block"_err_en_US);
|
|
} else if (symbol->IsDummy()) {
|
|
Say(name,
|
|
"Dummy argument '%s' may not appear in a COMMON block"_err_en_US);
|
|
} else if (symbol->IsFuncResult()) {
|
|
Say(name,
|
|
"Function result '%s' may not appear in a COMMON block"_err_en_US);
|
|
} else if (const DeclTypeSpec * type{symbol->GetType()}) {
|
|
if (type->category() == DeclTypeSpec::ClassStar) {
|
|
Say(name,
|
|
"Unlimited polymorphic pointer '%s' may not appear in a COMMON block"_err_en_US);
|
|
} else if (const auto *derived{type->AsDerived()}) {
|
|
auto &typeSymbol{derived->typeSymbol()};
|
|
if (!typeSymbol.attrs().test(Attr::BIND_C) &&
|
|
!typeSymbol.get<DerivedTypeDetails>().sequence()) {
|
|
Say(name,
|
|
"Derived type '%s' in COMMON block must have the BIND or"
|
|
" SEQUENCE attribute"_err_en_US);
|
|
}
|
|
CheckCommonBlockDerivedType(name, typeSymbol);
|
|
}
|
|
}
|
|
}
|
|
commonBlockInfo_ = {};
|
|
}
|
|
|
|
Symbol &DeclarationVisitor::MakeCommonBlockSymbol(const parser::Name &name) {
|
|
return Resolve(name, currScope().MakeCommonBlock(name.source));
|
|
}
|
|
|
|
bool DeclarationVisitor::NameIsKnownOrIntrinsic(const parser::Name &name) {
|
|
return FindSymbol(name) || HandleUnrestrictedSpecificIntrinsicFunction(name);
|
|
}
|
|
|
|
// Check if this derived type can be in a COMMON block.
|
|
void DeclarationVisitor::CheckCommonBlockDerivedType(
|
|
const SourceName &name, const Symbol &typeSymbol) {
|
|
if (const auto *scope{typeSymbol.scope()}) {
|
|
for (const auto &pair : *scope) {
|
|
const Symbol &component{*pair.second};
|
|
if (component.attrs().test(Attr::ALLOCATABLE)) {
|
|
Say2(name,
|
|
"Derived type variable '%s' may not appear in a COMMON block"
|
|
" due to ALLOCATABLE component"_err_en_US,
|
|
component.name(), "Component with ALLOCATABLE attribute"_en_US);
|
|
return;
|
|
}
|
|
if (const auto *details{component.detailsIf<ObjectEntityDetails>()}) {
|
|
if (details->init()) {
|
|
Say2(name,
|
|
"Derived type variable '%s' may not appear in a COMMON block"
|
|
" due to component with default initialization"_err_en_US,
|
|
component.name(), "Component with default initialization"_en_US);
|
|
return;
|
|
}
|
|
if (const auto *type{details->type()}) {
|
|
if (const auto *derived{type->AsDerived()}) {
|
|
CheckCommonBlockDerivedType(name, derived->typeSymbol());
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
bool DeclarationVisitor::HandleUnrestrictedSpecificIntrinsicFunction(
|
|
const parser::Name &name) {
|
|
if (auto interface{context().intrinsics().IsSpecificIntrinsicFunction(
|
|
name.source.ToString())}) {
|
|
// Unrestricted specific intrinsic function names (e.g., "cos")
|
|
// are acceptable as procedure interfaces.
|
|
Symbol &symbol{
|
|
MakeSymbol(InclusiveScope(), name.source, Attrs{Attr::INTRINSIC})};
|
|
if (interface->IsElemental()) {
|
|
symbol.attrs().set(Attr::ELEMENTAL);
|
|
}
|
|
symbol.set_details(ProcEntityDetails{});
|
|
Resolve(name, symbol);
|
|
return true;
|
|
} else {
|
|
return false;
|
|
}
|
|
}
|
|
|
|
// Checks for all locality-specs: LOCAL, LOCAL_INIT, and SHARED
|
|
bool DeclarationVisitor::PassesSharedLocalityChecks(
|
|
const parser::Name &name, Symbol &symbol) {
|
|
if (!IsVariableName(symbol)) {
|
|
SayLocalMustBeVariable(name, symbol); // C1124
|
|
return false;
|
|
}
|
|
if (symbol.owner() == currScope()) { // C1125 and C1126
|
|
SayAlreadyDeclared(name, symbol);
|
|
return false;
|
|
}
|
|
return true;
|
|
}
|
|
|
|
// Checks for locality-specs LOCAL and LOCAL_INIT
|
|
bool DeclarationVisitor::PassesLocalityChecks(
|
|
const parser::Name &name, Symbol &symbol) {
|
|
if (IsAllocatable(symbol)) { // C1128
|
|
SayWithDecl(name, symbol,
|
|
"ALLOCATABLE variable '%s' not allowed in a locality-spec"_err_en_US);
|
|
return false;
|
|
}
|
|
if (IsOptional(symbol)) { // C1128
|
|
SayWithDecl(name, symbol,
|
|
"OPTIONAL argument '%s' not allowed in a locality-spec"_err_en_US);
|
|
return false;
|
|
}
|
|
if (IsIntentIn(symbol)) { // C1128
|
|
SayWithDecl(name, symbol,
|
|
"INTENT IN argument '%s' not allowed in a locality-spec"_err_en_US);
|
|
return false;
|
|
}
|
|
if (IsFinalizable(symbol)) { // C1128
|
|
SayWithDecl(name, symbol,
|
|
"Finalizable variable '%s' not allowed in a locality-spec"_err_en_US);
|
|
return false;
|
|
}
|
|
if (IsCoarray(symbol)) { // C1128
|
|
SayWithDecl(
|
|
name, symbol, "Coarray '%s' not allowed in a locality-spec"_err_en_US);
|
|
return false;
|
|
}
|
|
if (const DeclTypeSpec * type{symbol.GetType()}) {
|
|
if (type->IsPolymorphic() && symbol.IsDummy() &&
|
|
!IsPointer(symbol)) { // C1128
|
|
SayWithDecl(name, symbol,
|
|
"Nonpointer polymorphic argument '%s' not allowed in a "
|
|
"locality-spec"_err_en_US);
|
|
return false;
|
|
}
|
|
}
|
|
if (IsAssumedSizeArray(symbol)) { // C1128
|
|
SayWithDecl(name, symbol,
|
|
"Assumed size array '%s' not allowed in a locality-spec"_err_en_US);
|
|
return false;
|
|
}
|
|
if (std::optional<MessageFixedText> msg{
|
|
WhyNotModifiable(symbol, currScope())}) {
|
|
SayWithReason(name, symbol,
|
|
"'%s' may not appear in a locality-spec because it is not "
|
|
"definable"_err_en_US,
|
|
std::move(*msg));
|
|
return false;
|
|
}
|
|
return PassesSharedLocalityChecks(name, symbol);
|
|
}
|
|
|
|
Symbol &DeclarationVisitor::FindOrDeclareEnclosingEntity(
|
|
const parser::Name &name) {
|
|
Symbol *prev{FindSymbol(name)};
|
|
if (!prev) {
|
|
// Declare the name as an object in the enclosing scope so that
|
|
// the name can't be repurposed there later as something else.
|
|
prev = &MakeSymbol(InclusiveScope(), name.source, Attrs{});
|
|
ConvertToObjectEntity(*prev);
|
|
ApplyImplicitRules(*prev);
|
|
}
|
|
return *prev;
|
|
}
|
|
|
|
Symbol *DeclarationVisitor::DeclareLocalEntity(const parser::Name &name) {
|
|
Symbol &prev{FindOrDeclareEnclosingEntity(name)};
|
|
if (!PassesLocalityChecks(name, prev)) {
|
|
return nullptr;
|
|
}
|
|
Symbol &symbol{MakeSymbol(name, HostAssocDetails{prev})};
|
|
name.symbol = &symbol;
|
|
return &symbol;
|
|
}
|
|
|
|
Symbol *DeclarationVisitor::DeclareStatementEntity(const parser::Name &name,
|
|
const std::optional<parser::IntegerTypeSpec> &type) {
|
|
const DeclTypeSpec *declTypeSpec{nullptr};
|
|
if (auto *prev{FindSymbol(name)}) {
|
|
if (prev->owner() == currScope()) {
|
|
SayAlreadyDeclared(name, *prev);
|
|
return nullptr;
|
|
}
|
|
name.symbol = nullptr;
|
|
declTypeSpec = prev->GetType();
|
|
}
|
|
Symbol &symbol{DeclareEntity<ObjectEntityDetails>(name, {})};
|
|
if (!symbol.has<ObjectEntityDetails>()) {
|
|
return nullptr; // error was reported in DeclareEntity
|
|
}
|
|
if (type) {
|
|
declTypeSpec = ProcessTypeSpec(*type);
|
|
}
|
|
if (declTypeSpec) {
|
|
// Subtlety: Don't let a "*length" specifier (if any is pending) affect the
|
|
// declaration of this implied DO loop control variable.
|
|
auto restorer{
|
|
common::ScopedSet(charInfo_.length, std::optional<ParamValue>{})};
|
|
SetType(name, *declTypeSpec);
|
|
} else {
|
|
ApplyImplicitRules(symbol);
|
|
}
|
|
return Resolve(name, &symbol);
|
|
}
|
|
|
|
// Set the type of an entity or report an error.
|
|
void DeclarationVisitor::SetType(
|
|
const parser::Name &name, const DeclTypeSpec &type) {
|
|
CHECK(name.symbol);
|
|
auto &symbol{*name.symbol};
|
|
if (charInfo_.length) { // Declaration has "*length" (R723)
|
|
auto length{std::move(*charInfo_.length)};
|
|
charInfo_.length.reset();
|
|
if (type.category() == DeclTypeSpec::Character) {
|
|
auto kind{type.characterTypeSpec().kind()};
|
|
// Recurse with correct type.
|
|
SetType(name,
|
|
currScope().MakeCharacterType(std::move(length), std::move(kind)));
|
|
return;
|
|
} else {
|
|
Say(name,
|
|
"A length specifier cannot be used to declare the non-character entity '%s'"_err_en_US);
|
|
}
|
|
}
|
|
auto *prevType{symbol.GetType()};
|
|
if (!prevType) {
|
|
symbol.SetType(type);
|
|
} else if (symbol.has<UseDetails>()) {
|
|
// error recovery case, redeclaration of use-associated name
|
|
} else if (!symbol.test(Symbol::Flag::Implicit)) {
|
|
SayWithDecl(
|
|
name, symbol, "The type of '%s' has already been declared"_err_en_US);
|
|
} else if (type != *prevType) {
|
|
SayWithDecl(name, symbol,
|
|
"The type of '%s' has already been implicitly declared"_err_en_US);
|
|
} else {
|
|
symbol.set(Symbol::Flag::Implicit, false);
|
|
}
|
|
}
|
|
|
|
std::optional<DerivedTypeSpec> DeclarationVisitor::ResolveDerivedType(
|
|
const parser::Name &name) {
|
|
Symbol *symbol{FindSymbol(name)};
|
|
if (!symbol || symbol->has<UnknownDetails>()) {
|
|
if (allowForwardReferenceToDerivedType()) {
|
|
if (!symbol) {
|
|
symbol = &MakeSymbol(InclusiveScope(), name.source, Attrs{});
|
|
Resolve(name, *symbol);
|
|
};
|
|
DerivedTypeDetails details;
|
|
details.set_isForwardReferenced();
|
|
symbol->set_details(std::move(details));
|
|
} else { // C732
|
|
Say(name, "Derived type '%s' not found"_err_en_US);
|
|
return std::nullopt;
|
|
}
|
|
}
|
|
if (CheckUseError(name)) {
|
|
return std::nullopt;
|
|
}
|
|
symbol = &symbol->GetUltimate();
|
|
if (auto *details{symbol->detailsIf<GenericDetails>()}) {
|
|
if (details->derivedType()) {
|
|
symbol = details->derivedType();
|
|
}
|
|
}
|
|
if (symbol->has<DerivedTypeDetails>()) {
|
|
return DerivedTypeSpec{name.source, *symbol};
|
|
} else {
|
|
Say(name, "'%s' is not a derived type"_err_en_US);
|
|
return std::nullopt;
|
|
}
|
|
}
|
|
|
|
std::optional<DerivedTypeSpec> DeclarationVisitor::ResolveExtendsType(
|
|
const parser::Name &typeName, const parser::Name *extendsName) {
|
|
if (!extendsName) {
|
|
return std::nullopt;
|
|
} else if (typeName.source == extendsName->source) {
|
|
Say(extendsName->source,
|
|
"Derived type '%s' cannot extend itself"_err_en_US);
|
|
return std::nullopt;
|
|
} else {
|
|
return ResolveDerivedType(*extendsName);
|
|
}
|
|
}
|
|
|
|
Symbol *DeclarationVisitor::NoteInterfaceName(const parser::Name &name) {
|
|
// The symbol is checked later by CheckExplicitInterface() and
|
|
// CheckBindings(). It can be a forward reference.
|
|
if (!NameIsKnownOrIntrinsic(name)) {
|
|
Symbol &symbol{MakeSymbol(InclusiveScope(), name.source, Attrs{})};
|
|
Resolve(name, symbol);
|
|
}
|
|
return name.symbol;
|
|
}
|
|
|
|
void DeclarationVisitor::CheckExplicitInterface(const parser::Name &name) {
|
|
if (const Symbol * symbol{name.symbol}) {
|
|
if (!symbol->HasExplicitInterface()) {
|
|
Say(name,
|
|
"'%s' must be an abstract interface or a procedure with "
|
|
"an explicit interface"_err_en_US,
|
|
symbol->name());
|
|
}
|
|
}
|
|
}
|
|
|
|
// Create a symbol for a type parameter, component, or procedure binding in
|
|
// the current derived type scope. Return false on error.
|
|
Symbol *DeclarationVisitor::MakeTypeSymbol(
|
|
const parser::Name &name, Details &&details) {
|
|
return Resolve(name, MakeTypeSymbol(name.source, std::move(details)));
|
|
}
|
|
Symbol *DeclarationVisitor::MakeTypeSymbol(
|
|
const SourceName &name, Details &&details) {
|
|
Scope &derivedType{currScope()};
|
|
CHECK(derivedType.IsDerivedType());
|
|
if (auto *symbol{FindInScope(derivedType, name)}) {
|
|
Say2(name,
|
|
"Type parameter, component, or procedure binding '%s'"
|
|
" already defined in this type"_err_en_US,
|
|
*symbol, "Previous definition of '%s'"_en_US);
|
|
return nullptr;
|
|
} else {
|
|
auto attrs{GetAttrs()};
|
|
// Apply binding-private-stmt if present and this is a procedure binding
|
|
if (derivedTypeInfo_.privateBindings &&
|
|
!attrs.HasAny({Attr::PUBLIC, Attr::PRIVATE}) &&
|
|
std::holds_alternative<ProcBindingDetails>(details)) {
|
|
attrs.set(Attr::PRIVATE);
|
|
}
|
|
Symbol &result{MakeSymbol(name, attrs, std::move(details))};
|
|
if (result.has<TypeParamDetails>()) {
|
|
derivedType.symbol()->get<DerivedTypeDetails>().add_paramDecl(result);
|
|
}
|
|
return &result;
|
|
}
|
|
}
|
|
|
|
// Return true if it is ok to declare this component in the current scope.
|
|
// Otherwise, emit an error and return false.
|
|
bool DeclarationVisitor::OkToAddComponent(
|
|
const parser::Name &name, const Symbol *extends) {
|
|
for (const Scope *scope{&currScope()}; scope;) {
|
|
CHECK(scope->IsDerivedType());
|
|
if (auto *prev{FindInScope(*scope, name)}) {
|
|
auto msg{""_en_US};
|
|
if (extends) {
|
|
msg = "Type cannot be extended as it has a component named"
|
|
" '%s'"_err_en_US;
|
|
} else if (prev->test(Symbol::Flag::ParentComp)) {
|
|
msg = "'%s' is a parent type of this type and so cannot be"
|
|
" a component"_err_en_US;
|
|
} else if (scope != &currScope()) {
|
|
msg = "Component '%s' is already declared in a parent of this"
|
|
" derived type"_err_en_US;
|
|
} else {
|
|
msg = "Component '%s' is already declared in this"
|
|
" derived type"_err_en_US;
|
|
}
|
|
Say2(name, std::move(msg), *prev, "Previous declaration of '%s'"_en_US);
|
|
return false;
|
|
}
|
|
if (scope == &currScope() && extends) {
|
|
// The parent component has not yet been added to the scope.
|
|
scope = extends->scope();
|
|
} else {
|
|
scope = scope->GetDerivedTypeParent();
|
|
}
|
|
}
|
|
return true;
|
|
}
|
|
|
|
ParamValue DeclarationVisitor::GetParamValue(
|
|
const parser::TypeParamValue &x, common::TypeParamAttr attr) {
|
|
return std::visit(
|
|
common::visitors{
|
|
[=](const parser::ScalarIntExpr &x) { // C704
|
|
return ParamValue{EvaluateIntExpr(x), attr};
|
|
},
|
|
[=](const parser::Star &) { return ParamValue::Assumed(attr); },
|
|
[=](const parser::TypeParamValue::Deferred &) {
|
|
return ParamValue::Deferred(attr);
|
|
},
|
|
},
|
|
x.u);
|
|
}
|
|
|
|
// ConstructVisitor implementation
|
|
|
|
void ConstructVisitor::ResolveIndexName(
|
|
const parser::ConcurrentControl &control) {
|
|
const parser::Name &name{std::get<parser::Name>(control.t)};
|
|
auto *prev{FindSymbol(name)};
|
|
if (prev) {
|
|
if (prev->owner().kind() == Scope::Kind::Forall ||
|
|
prev->owner() == currScope()) {
|
|
SayAlreadyDeclared(name, *prev);
|
|
return;
|
|
}
|
|
name.symbol = nullptr;
|
|
}
|
|
auto &symbol{DeclareObjectEntity(name, {})};
|
|
|
|
if (symbol.GetType()) {
|
|
// type came from explicit type-spec
|
|
} else if (!prev) {
|
|
ApplyImplicitRules(symbol);
|
|
} else if (!prev->has<ObjectEntityDetails>() && !prev->has<EntityDetails>()) {
|
|
Say2(name, "Index name '%s' conflicts with existing identifier"_err_en_US,
|
|
*prev, "Previous declaration of '%s'"_en_US);
|
|
return;
|
|
} else {
|
|
if (const auto *type{prev->GetType()}) {
|
|
symbol.SetType(*type);
|
|
}
|
|
if (prev->IsObjectArray()) {
|
|
SayWithDecl(name, *prev, "Index variable '%s' is not scalar"_err_en_US);
|
|
return;
|
|
}
|
|
}
|
|
EvaluateExpr(parser::Scalar{parser::Integer{common::Clone(name)}});
|
|
}
|
|
|
|
// We need to make sure that all of the index-names get declared before the
|
|
// expressions in the loop control are evaluated so that references to the
|
|
// index-names in the expressions are correctly detected.
|
|
bool ConstructVisitor::Pre(const parser::ConcurrentHeader &header) {
|
|
BeginDeclTypeSpec();
|
|
Walk(std::get<std::optional<parser::IntegerTypeSpec>>(header.t));
|
|
const auto &controls{
|
|
std::get<std::list<parser::ConcurrentControl>>(header.t)};
|
|
for (const auto &control : controls) {
|
|
ResolveIndexName(control);
|
|
}
|
|
Walk(controls);
|
|
Walk(std::get<std::optional<parser::ScalarLogicalExpr>>(header.t));
|
|
EndDeclTypeSpec();
|
|
return false;
|
|
}
|
|
|
|
bool ConstructVisitor::Pre(const parser::LocalitySpec::Local &x) {
|
|
for (auto &name : x.v) {
|
|
if (auto *symbol{DeclareLocalEntity(name)}) {
|
|
symbol->set(Symbol::Flag::LocalityLocal);
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|
|
bool ConstructVisitor::Pre(const parser::LocalitySpec::LocalInit &x) {
|
|
for (auto &name : x.v) {
|
|
if (auto *symbol{DeclareLocalEntity(name)}) {
|
|
symbol->set(Symbol::Flag::LocalityLocalInit);
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|
|
bool ConstructVisitor::Pre(const parser::LocalitySpec::Shared &x) {
|
|
for (const auto &name : x.v) {
|
|
if (!FindSymbol(name)) {
|
|
Say(name, "Variable '%s' with SHARED locality implicitly declared"_en_US);
|
|
}
|
|
Symbol &prev{FindOrDeclareEnclosingEntity(name)};
|
|
if (PassesSharedLocalityChecks(name, prev)) {
|
|
auto &symbol{MakeSymbol(name, HostAssocDetails{prev})};
|
|
symbol.set(Symbol::Flag::LocalityShared);
|
|
name.symbol = &symbol; // override resolution to parent
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|
|
bool ConstructVisitor::Pre(const parser::AcSpec &x) {
|
|
ProcessTypeSpec(x.type);
|
|
PushScope(Scope::Kind::ImpliedDos, nullptr);
|
|
Walk(x.values);
|
|
PopScope();
|
|
return false;
|
|
}
|
|
|
|
bool ConstructVisitor::Pre(const parser::AcImpliedDo &x) {
|
|
auto &values{std::get<std::list<parser::AcValue>>(x.t)};
|
|
auto &control{std::get<parser::AcImpliedDoControl>(x.t)};
|
|
auto &type{std::get<std::optional<parser::IntegerTypeSpec>>(control.t)};
|
|
auto &bounds{std::get<parser::AcImpliedDoControl::Bounds>(control.t)};
|
|
DeclareStatementEntity(bounds.name.thing.thing, type);
|
|
Walk(bounds);
|
|
Walk(values);
|
|
return false;
|
|
}
|
|
|
|
bool ConstructVisitor::Pre(const parser::DataImpliedDo &x) {
|
|
auto &objects{std::get<std::list<parser::DataIDoObject>>(x.t)};
|
|
auto &type{std::get<std::optional<parser::IntegerTypeSpec>>(x.t)};
|
|
auto &bounds{std::get<parser::DataImpliedDo::Bounds>(x.t)};
|
|
DeclareStatementEntity(bounds.name.thing.thing, type);
|
|
Walk(bounds);
|
|
Walk(objects);
|
|
return false;
|
|
}
|
|
|
|
bool ConstructVisitor::Pre(const parser::DataStmtObject &x) {
|
|
std::visit(common::visitors{
|
|
[&](const Indirection<parser::Variable> &y) {
|
|
Walk(y.value());
|
|
if (const auto *designator{
|
|
std::get_if<Indirection<parser::Designator>>(
|
|
&y.value().u)}) {
|
|
if (const parser::Name *
|
|
name{ResolveDesignator(designator->value())}) {
|
|
if (name->symbol) {
|
|
name->symbol->set(Symbol::Flag::InDataStmt);
|
|
}
|
|
}
|
|
// TODO check C874 - C881
|
|
} else {
|
|
// TODO report C875 error: variable is not a designator
|
|
// here?
|
|
}
|
|
},
|
|
[&](const parser::DataImpliedDo &y) {
|
|
PushScope(Scope::Kind::ImpliedDos, nullptr);
|
|
Walk(y);
|
|
PopScope();
|
|
},
|
|
},
|
|
x.u);
|
|
return false;
|
|
}
|
|
|
|
bool ConstructVisitor::Pre(const parser::DataStmtValue &x) {
|
|
const auto &data{std::get<parser::DataStmtConstant>(x.t)};
|
|
auto &mutableData{const_cast<parser::DataStmtConstant &>(data)};
|
|
if (auto *elem{parser::Unwrap<parser::ArrayElement>(mutableData)}) {
|
|
if (const auto *name{std::get_if<parser::Name>(&elem->base.u)}) {
|
|
if (const Symbol * symbol{FindSymbol(*name)}) {
|
|
if (const Symbol * ultimate{GetAssociationRoot(*symbol)}) {
|
|
if (ultimate->has<DerivedTypeDetails>()) {
|
|
mutableData.u = elem->ConvertToStructureConstructor(
|
|
DerivedTypeSpec{name->source, *ultimate});
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
return true;
|
|
}
|
|
|
|
bool ConstructVisitor::Pre(const parser::DoConstruct &x) {
|
|
if (x.IsDoConcurrent()) {
|
|
PushScope(Scope::Kind::Block, nullptr);
|
|
}
|
|
return true;
|
|
}
|
|
void ConstructVisitor::Post(const parser::DoConstruct &x) {
|
|
if (x.IsDoConcurrent()) {
|
|
PopScope();
|
|
}
|
|
}
|
|
|
|
bool ConstructVisitor::Pre(const parser::ForallConstruct &) {
|
|
PushScope(Scope::Kind::Forall, nullptr);
|
|
return true;
|
|
}
|
|
void ConstructVisitor::Post(const parser::ForallConstruct &) { PopScope(); }
|
|
bool ConstructVisitor::Pre(const parser::ForallStmt &) {
|
|
PushScope(Scope::Kind::Forall, nullptr);
|
|
return true;
|
|
}
|
|
void ConstructVisitor::Post(const parser::ForallStmt &) { PopScope(); }
|
|
|
|
bool ConstructVisitor::Pre(const parser::BlockStmt &x) {
|
|
CheckDef(x.v);
|
|
PushScope(Scope::Kind::Block, nullptr);
|
|
return false;
|
|
}
|
|
bool ConstructVisitor::Pre(const parser::EndBlockStmt &x) {
|
|
PopScope();
|
|
CheckRef(x.v);
|
|
return false;
|
|
}
|
|
|
|
void ConstructVisitor::Post(const parser::Selector &x) {
|
|
GetCurrentAssociation().selector = ResolveSelector(x);
|
|
}
|
|
|
|
bool ConstructVisitor::Pre(const parser::AssociateStmt &x) {
|
|
CheckDef(x.t);
|
|
PushScope(Scope::Kind::Block, nullptr);
|
|
PushAssociation();
|
|
return true;
|
|
}
|
|
void ConstructVisitor::Post(const parser::EndAssociateStmt &x) {
|
|
PopAssociation();
|
|
PopScope();
|
|
CheckRef(x.v);
|
|
}
|
|
|
|
void ConstructVisitor::Post(const parser::Association &x) {
|
|
const auto &name{std::get<parser::Name>(x.t)};
|
|
GetCurrentAssociation().name = &name;
|
|
if (auto *symbol{MakeAssocEntity()}) {
|
|
SetTypeFromAssociation(*symbol);
|
|
SetAttrsFromAssociation(*symbol);
|
|
}
|
|
GetCurrentAssociation() = {}; // clean for further parser::Association.
|
|
}
|
|
|
|
bool ConstructVisitor::Pre(const parser::ChangeTeamStmt &x) {
|
|
CheckDef(x.t);
|
|
PushScope(Scope::Kind::Block, nullptr);
|
|
PushAssociation();
|
|
return true;
|
|
}
|
|
|
|
void ConstructVisitor::Post(const parser::CoarrayAssociation &x) {
|
|
const auto &decl{std::get<parser::CodimensionDecl>(x.t)};
|
|
const auto &name{std::get<parser::Name>(decl.t)};
|
|
if (auto *symbol{FindInScope(currScope(), name)}) {
|
|
const auto &selector{std::get<parser::Selector>(x.t)};
|
|
if (auto sel{ResolveSelector(selector)}) {
|
|
const Symbol *whole{UnwrapWholeSymbolDataRef(sel.expr)};
|
|
if (!whole || whole->Corank() == 0) {
|
|
Say(sel.source, // C1116
|
|
"Selector in coarray association must name a coarray"_err_en_US);
|
|
} else if (auto dynType{sel.expr->GetType()}) {
|
|
if (!symbol->GetType()) {
|
|
symbol->SetType(ToDeclTypeSpec(std::move(*dynType)));
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
void ConstructVisitor::Post(const parser::EndChangeTeamStmt &x) {
|
|
PopAssociation();
|
|
PopScope();
|
|
CheckRef(x.t);
|
|
}
|
|
|
|
bool ConstructVisitor::Pre(const parser::SelectTypeConstruct &) {
|
|
PushAssociation();
|
|
return true;
|
|
}
|
|
|
|
void ConstructVisitor::Post(const parser::SelectTypeConstruct &) {
|
|
PopAssociation();
|
|
}
|
|
|
|
void ConstructVisitor::Post(const parser::SelectTypeStmt &x) {
|
|
auto &association{GetCurrentAssociation()};
|
|
if (const std::optional<parser::Name> &name{std::get<1>(x.t)}) {
|
|
// This isn't a name in the current scope, it is in each TypeGuardStmt
|
|
MakePlaceholder(*name, MiscDetails::Kind::SelectTypeAssociateName);
|
|
association.name = &*name;
|
|
} else {
|
|
if (const Symbol *
|
|
whole{UnwrapWholeSymbolDataRef(association.selector.expr)}) {
|
|
ConvertToObjectEntity(const_cast<Symbol &>(*whole));
|
|
if (!IsVariableName(*whole)) {
|
|
Say(association.selector.source, // C901
|
|
"Selector is not a variable"_err_en_US);
|
|
association = {};
|
|
}
|
|
} else {
|
|
Say(association.selector.source, // C1157
|
|
"Selector is not a named variable: 'associate-name =>' is required"_err_en_US);
|
|
association = {};
|
|
}
|
|
}
|
|
}
|
|
|
|
bool ConstructVisitor::Pre(const parser::SelectTypeConstruct::TypeCase &) {
|
|
PushScope(Scope::Kind::Block, nullptr);
|
|
return true;
|
|
}
|
|
void ConstructVisitor::Post(const parser::SelectTypeConstruct::TypeCase &) {
|
|
PopScope();
|
|
}
|
|
|
|
void ConstructVisitor::Post(const parser::TypeGuardStmt::Guard &x) {
|
|
if (auto *symbol{MakeAssocEntity()}) {
|
|
if (std::holds_alternative<parser::Default>(x.u)) {
|
|
SetTypeFromAssociation(*symbol);
|
|
} else if (const auto *type{GetDeclTypeSpec()}) {
|
|
symbol->SetType(*type);
|
|
}
|
|
SetAttrsFromAssociation(*symbol);
|
|
}
|
|
}
|
|
|
|
bool ConstructVisitor::Pre(const parser::SelectRankConstruct &) {
|
|
PushAssociation();
|
|
return true;
|
|
}
|
|
|
|
void ConstructVisitor::Post(const parser::SelectRankConstruct &) {
|
|
PopAssociation();
|
|
}
|
|
|
|
bool ConstructVisitor::CheckDef(const std::optional<parser::Name> &x) {
|
|
if (x) {
|
|
MakeSymbol(*x, MiscDetails{MiscDetails::Kind::ConstructName});
|
|
}
|
|
return true;
|
|
}
|
|
|
|
void ConstructVisitor::CheckRef(const std::optional<parser::Name> &x) {
|
|
if (x) {
|
|
// Just add an occurrence of this name; checking is done in ValidateLabels
|
|
FindSymbol(*x);
|
|
}
|
|
}
|
|
|
|
// Make a symbol representing an associating entity from current association.
|
|
Symbol *ConstructVisitor::MakeAssocEntity() {
|
|
Symbol *symbol{nullptr};
|
|
auto &association{GetCurrentAssociation()};
|
|
if (association.name) {
|
|
symbol = &MakeSymbol(*association.name, UnknownDetails{});
|
|
if (symbol->has<AssocEntityDetails>() && symbol->owner() == currScope()) {
|
|
Say(*association.name, // C1104
|
|
"The associate name '%s' is already used in this associate statement"_err_en_US);
|
|
return nullptr;
|
|
}
|
|
} else if (const Symbol *
|
|
whole{UnwrapWholeSymbolDataRef(association.selector.expr)}) {
|
|
symbol = &MakeSymbol(whole->name());
|
|
} else {
|
|
return nullptr;
|
|
}
|
|
if (auto &expr{association.selector.expr}) {
|
|
symbol->set_details(AssocEntityDetails{common::Clone(*expr)});
|
|
} else {
|
|
symbol->set_details(AssocEntityDetails{});
|
|
}
|
|
return symbol;
|
|
}
|
|
|
|
// Set the type of symbol based on the current association selector.
|
|
void ConstructVisitor::SetTypeFromAssociation(Symbol &symbol) {
|
|
auto &details{symbol.get<AssocEntityDetails>()};
|
|
const MaybeExpr *pexpr{&details.expr()};
|
|
if (!*pexpr) {
|
|
pexpr = &GetCurrentAssociation().selector.expr;
|
|
}
|
|
if (*pexpr) {
|
|
const SomeExpr &expr{**pexpr};
|
|
if (std::optional<evaluate::DynamicType> type{expr.GetType()}) {
|
|
if (const auto *charExpr{
|
|
evaluate::UnwrapExpr<evaluate::Expr<evaluate::SomeCharacter>>(
|
|
expr)}) {
|
|
symbol.SetType(ToDeclTypeSpec(std::move(*type),
|
|
FoldExpr(
|
|
std::visit([](const auto &kindChar) { return kindChar.LEN(); },
|
|
charExpr->u))));
|
|
} else {
|
|
symbol.SetType(ToDeclTypeSpec(std::move(*type)));
|
|
}
|
|
} else {
|
|
// BOZ literals, procedure designators, &c. are not acceptable
|
|
Say(symbol.name(), "Associate name '%s' must have a type"_err_en_US);
|
|
}
|
|
}
|
|
}
|
|
|
|
// If current selector is a variable, set some of its attributes on symbol.
|
|
void ConstructVisitor::SetAttrsFromAssociation(Symbol &symbol) {
|
|
Attrs attrs{evaluate::GetAttrs(GetCurrentAssociation().selector.expr)};
|
|
symbol.attrs() |= attrs &
|
|
Attrs{Attr::TARGET, Attr::ASYNCHRONOUS, Attr::VOLATILE, Attr::CONTIGUOUS};
|
|
if (attrs.test(Attr::POINTER)) {
|
|
symbol.attrs().set(Attr::TARGET);
|
|
}
|
|
}
|
|
|
|
ConstructVisitor::Selector ConstructVisitor::ResolveSelector(
|
|
const parser::Selector &x) {
|
|
return std::visit(common::visitors{
|
|
[&](const parser::Expr &expr) {
|
|
return Selector{expr.source, EvaluateExpr(expr)};
|
|
},
|
|
[&](const parser::Variable &var) {
|
|
return Selector{var.GetSource(), EvaluateExpr(var)};
|
|
},
|
|
},
|
|
x.u);
|
|
}
|
|
|
|
ConstructVisitor::Association &ConstructVisitor::GetCurrentAssociation() {
|
|
CHECK(!associationStack_.empty());
|
|
return associationStack_.back();
|
|
}
|
|
|
|
void ConstructVisitor::PushAssociation() {
|
|
associationStack_.emplace_back(Association{});
|
|
}
|
|
|
|
void ConstructVisitor::PopAssociation() {
|
|
CHECK(!associationStack_.empty());
|
|
associationStack_.pop_back();
|
|
}
|
|
|
|
const DeclTypeSpec &ConstructVisitor::ToDeclTypeSpec(
|
|
evaluate::DynamicType &&type) {
|
|
switch (type.category()) {
|
|
SWITCH_COVERS_ALL_CASES
|
|
case common::TypeCategory::Integer:
|
|
case common::TypeCategory::Real:
|
|
case common::TypeCategory::Complex:
|
|
return context().MakeNumericType(type.category(), type.kind());
|
|
case common::TypeCategory::Logical:
|
|
return context().MakeLogicalType(type.kind());
|
|
case common::TypeCategory::Derived:
|
|
if (type.IsAssumedType()) {
|
|
return currScope().MakeTypeStarType();
|
|
} else if (type.IsUnlimitedPolymorphic()) {
|
|
return currScope().MakeClassStarType();
|
|
} else {
|
|
return currScope().MakeDerivedType(
|
|
type.IsPolymorphic() ? DeclTypeSpec::ClassDerived
|
|
: DeclTypeSpec::TypeDerived,
|
|
common::Clone(type.GetDerivedTypeSpec())
|
|
|
|
);
|
|
}
|
|
case common::TypeCategory::Character:
|
|
CRASH_NO_CASE;
|
|
}
|
|
}
|
|
|
|
const DeclTypeSpec &ConstructVisitor::ToDeclTypeSpec(
|
|
evaluate::DynamicType &&type, MaybeSubscriptIntExpr &&length) {
|
|
CHECK(type.category() == common::TypeCategory::Character);
|
|
if (length) {
|
|
return currScope().MakeCharacterType(
|
|
ParamValue{SomeIntExpr{*std::move(length)}, common::TypeParamAttr::Len},
|
|
KindExpr{type.kind()});
|
|
} else {
|
|
return currScope().MakeCharacterType(
|
|
ParamValue::Deferred(common::TypeParamAttr::Len),
|
|
KindExpr{type.kind()});
|
|
}
|
|
}
|
|
|
|
// ResolveNamesVisitor implementation
|
|
|
|
// Ensures that bare undeclared intrinsic procedure names passed as actual
|
|
// arguments get recognized as being intrinsics.
|
|
bool ResolveNamesVisitor::Pre(const parser::ActualArg &arg) {
|
|
if (const auto *expr{std::get_if<Indirection<parser::Expr>>(&arg.u)}) {
|
|
if (const auto *designator{
|
|
std::get_if<Indirection<parser::Designator>>(&expr->value().u)}) {
|
|
if (const auto *dataRef{
|
|
std::get_if<parser::DataRef>(&designator->value().u)}) {
|
|
if (const auto *name{std::get_if<parser::Name>(&dataRef->u)}) {
|
|
NameIsKnownOrIntrinsic(*name);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
return true;
|
|
}
|
|
|
|
bool ResolveNamesVisitor::Pre(const parser::FunctionReference &x) {
|
|
HandleCall(Symbol::Flag::Function, x.v);
|
|
return false;
|
|
}
|
|
bool ResolveNamesVisitor::Pre(const parser::CallStmt &x) {
|
|
HandleCall(Symbol::Flag::Subroutine, x.v);
|
|
return false;
|
|
}
|
|
|
|
bool ResolveNamesVisitor::Pre(const parser::ImportStmt &x) {
|
|
auto &scope{currScope()};
|
|
// Check C896 and C899: where IMPORT statements are allowed
|
|
switch (scope.kind()) {
|
|
case Scope::Kind::Module:
|
|
if (scope.IsModule()) {
|
|
Say("IMPORT is not allowed in a module scoping unit"_err_en_US);
|
|
return false;
|
|
} else if (x.kind == common::ImportKind::None) {
|
|
Say("IMPORT,NONE is not allowed in a submodule scoping unit"_err_en_US);
|
|
return false;
|
|
}
|
|
break;
|
|
case Scope::Kind::MainProgram:
|
|
Say("IMPORT is not allowed in a main program scoping unit"_err_en_US);
|
|
return false;
|
|
case Scope::Kind::Subprogram:
|
|
if (scope.parent().IsGlobal()) {
|
|
Say("IMPORT is not allowed in an external subprogram scoping unit"_err_en_US);
|
|
return false;
|
|
}
|
|
break;
|
|
case Scope::Kind::BlockData: // C1415 (in part)
|
|
Say("IMPORT is not allowed in a BLOCK DATA subprogram"_err_en_US);
|
|
return false;
|
|
default:;
|
|
}
|
|
if (auto error{scope.SetImportKind(x.kind)}) {
|
|
Say(std::move(*error));
|
|
}
|
|
for (auto &name : x.names) {
|
|
if (FindSymbol(scope.parent(), name)) {
|
|
scope.add_importName(name.source);
|
|
} else {
|
|
Say(name, "'%s' not found in host scope"_err_en_US);
|
|
}
|
|
}
|
|
prevImportStmt_ = currStmtSource();
|
|
return false;
|
|
}
|
|
|
|
const parser::Name *DeclarationVisitor::ResolveStructureComponent(
|
|
const parser::StructureComponent &x) {
|
|
return FindComponent(ResolveDataRef(x.base), x.component);
|
|
}
|
|
|
|
const parser::Name *DeclarationVisitor::ResolveDesignator(
|
|
const parser::Designator &x) {
|
|
return std::visit(
|
|
common::visitors{
|
|
[&](const parser::DataRef &x) { return ResolveDataRef(x); },
|
|
[&](const parser::Substring &x) {
|
|
return ResolveDataRef(std::get<parser::DataRef>(x.t));
|
|
},
|
|
},
|
|
x.u);
|
|
}
|
|
|
|
const parser::Name *DeclarationVisitor::ResolveDataRef(
|
|
const parser::DataRef &x) {
|
|
return std::visit(
|
|
common::visitors{
|
|
[=](const parser::Name &y) { return ResolveName(y); },
|
|
[=](const Indirection<parser::StructureComponent> &y) {
|
|
return ResolveStructureComponent(y.value());
|
|
},
|
|
[&](const Indirection<parser::ArrayElement> &y) {
|
|
Walk(y.value().subscripts);
|
|
return ResolveDataRef(y.value().base);
|
|
},
|
|
[&](const Indirection<parser::CoindexedNamedObject> &y) {
|
|
Walk(y.value().imageSelector);
|
|
return ResolveDataRef(y.value().base);
|
|
},
|
|
},
|
|
x.u);
|
|
}
|
|
|
|
const parser::Name *DeclarationVisitor::ResolveVariable(
|
|
const parser::Variable &x) {
|
|
return std::visit(
|
|
common::visitors{
|
|
[&](const Indirection<parser::Designator> &y) {
|
|
return ResolveDesignator(y.value());
|
|
},
|
|
[&](const Indirection<parser::FunctionReference> &y) {
|
|
const auto &proc{
|
|
std::get<parser::ProcedureDesignator>(y.value().v.t)};
|
|
return std::visit(common::visitors{
|
|
[&](const parser::Name &z) { return &z; },
|
|
[&](const parser::ProcComponentRef &z) {
|
|
return ResolveStructureComponent(z.v.thing);
|
|
},
|
|
},
|
|
proc.u);
|
|
},
|
|
},
|
|
x.u);
|
|
}
|
|
|
|
// If implicit types are allowed, ensure name is in the symbol table.
|
|
// Otherwise, report an error if it hasn't been declared.
|
|
const parser::Name *DeclarationVisitor::ResolveName(const parser::Name &name) {
|
|
if (Symbol * symbol{FindSymbol(name)}) {
|
|
if (CheckUseError(name)) {
|
|
return nullptr; // reported an error
|
|
}
|
|
if (symbol->IsDummy() ||
|
|
(!symbol->GetType() && FindCommonBlockContaining(*symbol))) {
|
|
ConvertToObjectEntity(*symbol);
|
|
ApplyImplicitRules(*symbol);
|
|
}
|
|
return &name;
|
|
}
|
|
if (isImplicitNoneType()) {
|
|
Say(name, "No explicit type declared for '%s'"_err_en_US);
|
|
return nullptr;
|
|
}
|
|
// Create the symbol then ensure it is accessible
|
|
MakeSymbol(InclusiveScope(), name.source, Attrs{});
|
|
auto *symbol{FindSymbol(name)};
|
|
if (!symbol) {
|
|
Say(name,
|
|
"'%s' from host scoping unit is not accessible due to IMPORT"_err_en_US);
|
|
return nullptr;
|
|
}
|
|
ConvertToObjectEntity(*symbol);
|
|
ApplyImplicitRules(*symbol);
|
|
return &name;
|
|
}
|
|
|
|
// base is a part-ref of a derived type; find the named component in its type.
|
|
// Also handles intrinsic type parameter inquiries (%kind, %len) and
|
|
// COMPLEX component references (%re, %im).
|
|
const parser::Name *DeclarationVisitor::FindComponent(
|
|
const parser::Name *base, const parser::Name &component) {
|
|
if (!base || !base->symbol) {
|
|
return nullptr;
|
|
}
|
|
auto &symbol{base->symbol->GetUltimate()};
|
|
if (!symbol.has<AssocEntityDetails>() && !ConvertToObjectEntity(symbol)) {
|
|
SayWithDecl(*base, symbol,
|
|
"'%s' is an invalid base for a component reference"_err_en_US);
|
|
return nullptr;
|
|
}
|
|
auto *type{symbol.GetType()};
|
|
if (!type) {
|
|
return nullptr; // should have already reported error
|
|
}
|
|
if (const IntrinsicTypeSpec * intrinsic{type->AsIntrinsic()}) {
|
|
auto name{component.ToString()};
|
|
auto category{intrinsic->category()};
|
|
MiscDetails::Kind miscKind{MiscDetails::Kind::None};
|
|
if (name == "kind") {
|
|
miscKind = MiscDetails::Kind::KindParamInquiry;
|
|
} else if (category == TypeCategory::Character) {
|
|
if (name == "len") {
|
|
miscKind = MiscDetails::Kind::LenParamInquiry;
|
|
}
|
|
} else if (category == TypeCategory::Complex) {
|
|
if (name == "re") {
|
|
miscKind = MiscDetails::Kind::ComplexPartRe;
|
|
} else if (name == "im") {
|
|
miscKind = MiscDetails::Kind::ComplexPartIm;
|
|
}
|
|
}
|
|
if (miscKind != MiscDetails::Kind::None) {
|
|
MakePlaceholder(component, miscKind);
|
|
return nullptr;
|
|
}
|
|
} else if (const DerivedTypeSpec * derived{type->AsDerived()}) {
|
|
if (const Scope * scope{derived->scope()}) {
|
|
if (Resolve(component, scope->FindComponent(component.source))) {
|
|
if (auto msg{
|
|
CheckAccessibleComponent(currScope(), *component.symbol)}) {
|
|
context().Say(component.source, *msg);
|
|
}
|
|
return &component;
|
|
} else {
|
|
SayDerivedType(component.source,
|
|
"Component '%s' not found in derived type '%s'"_err_en_US, *scope);
|
|
}
|
|
}
|
|
return nullptr;
|
|
}
|
|
if (symbol.test(Symbol::Flag::Implicit)) {
|
|
Say(*base,
|
|
"'%s' is not an object of derived type; it is implicitly typed"_err_en_US);
|
|
} else {
|
|
SayWithDecl(
|
|
*base, symbol, "'%s' is not an object of derived type"_err_en_US);
|
|
}
|
|
return nullptr;
|
|
}
|
|
|
|
// C764, C765
|
|
void DeclarationVisitor::CheckInitialDataTarget(
|
|
const Symbol &pointer, const SomeExpr &expr, SourceName source) {
|
|
auto &messages{GetFoldingContext().messages()};
|
|
auto restorer{messages.SetLocation(source)};
|
|
if (!evaluate::IsInitialDataTarget(expr, messages)) {
|
|
Say(source,
|
|
"Pointer '%s' cannot be initialized with a reference to a designator with non-constant subscripts"_err_en_US,
|
|
pointer.name());
|
|
return;
|
|
}
|
|
if (pointer.Rank() != expr.Rank()) {
|
|
Say(source,
|
|
"Pointer '%s' of rank %d cannot be initialized with a target of different rank (%d)"_err_en_US,
|
|
pointer.name(), pointer.Rank(), expr.Rank());
|
|
return;
|
|
}
|
|
// TODO: check type compatibility
|
|
// TODO: check non-deferred type parameter values
|
|
// TODO: check contiguity if pointer is CONTIGUOUS
|
|
}
|
|
|
|
void DeclarationVisitor::CheckInitialProcTarget(
|
|
const Symbol &pointer, const parser::Name &target, SourceName source) {
|
|
// C1519 - must be nonelemental external or module procedure,
|
|
// or an unrestricted specific intrinsic function.
|
|
if (const Symbol * targetSym{target.symbol}) {
|
|
const Symbol &ultimate{targetSym->GetUltimate()};
|
|
if (ultimate.attrs().test(Attr::INTRINSIC)) {
|
|
} else if (!ultimate.attrs().test(Attr::EXTERNAL) &&
|
|
ultimate.owner().kind() != Scope::Kind::Module) {
|
|
Say(source,
|
|
"Procedure pointer '%s' initializer '%s' is neither "
|
|
"an external nor a module procedure"_err_en_US,
|
|
pointer.name(), ultimate.name());
|
|
} else if (ultimate.attrs().test(Attr::ELEMENTAL)) {
|
|
Say(source,
|
|
"Procedure pointer '%s' cannot be initialized with the "
|
|
"elemental procedure '%s"_err_en_US,
|
|
pointer.name(), ultimate.name());
|
|
} else {
|
|
// TODO: Check the "shalls" in the 15.4.3.6 paragraphs 7-10.
|
|
}
|
|
}
|
|
}
|
|
|
|
void DeclarationVisitor::Initialization(const parser::Name &name,
|
|
const parser::Initialization &init, bool inComponentDecl) {
|
|
if (!name.symbol) {
|
|
return;
|
|
}
|
|
if (std::holds_alternative<parser::InitialDataTarget>(init.u)) {
|
|
// Defer analysis to the end of the specification parts so that forward
|
|
// references work better.
|
|
return;
|
|
}
|
|
// Traversal of the initializer was deferred to here so that the
|
|
// symbol being declared can be available for use in the expression, e.g.:
|
|
// real, parameter :: x = tiny(x)
|
|
Walk(init.u);
|
|
Symbol &ultimate{name.symbol->GetUltimate()};
|
|
if (auto *details{ultimate.detailsIf<ObjectEntityDetails>()}) {
|
|
// TODO: check C762 - all bounds and type parameters of component
|
|
// are colons or constant expressions if component is initialized
|
|
bool isPointer{false};
|
|
std::visit(
|
|
common::visitors{
|
|
[&](const parser::ConstantExpr &expr) {
|
|
if (inComponentDecl) {
|
|
// Can't convert to type of component, which might not yet
|
|
// be known; that's done later during instantiation.
|
|
if (MaybeExpr value{EvaluateExpr(expr)}) {
|
|
details->set_init(std::move(*value));
|
|
}
|
|
} else {
|
|
if (MaybeExpr folded{EvaluateConvertedExpr(
|
|
ultimate, expr, expr.thing.value().source)}) {
|
|
details->set_init(std::move(*folded));
|
|
}
|
|
}
|
|
},
|
|
[&](const parser::NullInit &) {
|
|
isPointer = true;
|
|
details->set_init(SomeExpr{evaluate::NullPointer{}});
|
|
},
|
|
[&](const parser::InitialDataTarget &initExpr) {
|
|
isPointer = true;
|
|
if (MaybeExpr expr{EvaluateExpr(initExpr)}) {
|
|
CheckInitialDataTarget(
|
|
ultimate, *expr, initExpr.value().source);
|
|
details->set_init(std::move(*expr));
|
|
}
|
|
},
|
|
[&](const std::list<Indirection<parser::DataStmtValue>> &) {
|
|
if (inComponentDecl) {
|
|
Say(name,
|
|
"Component '%s' initialized with DATA statement values"_err_en_US);
|
|
} else {
|
|
// TODO - DATA statements and DATA-like initialization extension
|
|
}
|
|
},
|
|
},
|
|
init.u);
|
|
if (isPointer) {
|
|
if (!IsPointer(ultimate)) {
|
|
Say(name,
|
|
"Non-pointer component '%s' initialized with pointer target"_err_en_US);
|
|
}
|
|
} else {
|
|
if (IsPointer(ultimate)) {
|
|
Say(name,
|
|
"Object pointer component '%s' initialized with non-pointer expression"_err_en_US);
|
|
} else if (IsAllocatable(ultimate)) {
|
|
Say(name, "Allocatable component '%s' cannot be initialized"_err_en_US);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
void DeclarationVisitor::PointerInitialization(
|
|
const parser::Name &name, const parser::InitialDataTarget &target) {
|
|
if (name.symbol) {
|
|
Symbol &ultimate{name.symbol->GetUltimate()};
|
|
if (IsPointer(ultimate)) {
|
|
if (auto *details{ultimate.detailsIf<ObjectEntityDetails>()}) {
|
|
CHECK(!details->init());
|
|
Walk(target);
|
|
if (MaybeExpr expr{EvaluateExpr(target)}) {
|
|
CheckInitialDataTarget(ultimate, *expr, target.value().source);
|
|
details->set_init(std::move(*expr));
|
|
}
|
|
}
|
|
} else {
|
|
Say(name, "'%s' is not a pointer but is initialized like one"_err_en_US);
|
|
}
|
|
}
|
|
}
|
|
void DeclarationVisitor::PointerInitialization(
|
|
const parser::Name &name, const parser::ProcPointerInit &target) {
|
|
if (name.symbol) {
|
|
Symbol &ultimate{name.symbol->GetUltimate()};
|
|
if (IsProcedurePointer(ultimate)) {
|
|
auto &details{ultimate.get<ProcEntityDetails>()};
|
|
CHECK(!details.init());
|
|
Walk(target);
|
|
if (const auto *targetName{std::get_if<parser::Name>(&target.u)}) {
|
|
CheckInitialProcTarget(ultimate, *targetName, name.source);
|
|
if (targetName->symbol) {
|
|
details.set_init(*targetName->symbol);
|
|
}
|
|
} else {
|
|
details.set_init(nullptr); // explicit NULL()
|
|
}
|
|
} else {
|
|
Say(name,
|
|
"'%s' is not a procedure pointer but is initialized "
|
|
"like one"_err_en_US);
|
|
}
|
|
}
|
|
}
|
|
|
|
void ResolveNamesVisitor::HandleCall(
|
|
Symbol::Flag procFlag, const parser::Call &call) {
|
|
std::visit(
|
|
common::visitors{
|
|
[&](const parser::Name &x) { HandleProcedureName(procFlag, x); },
|
|
[&](const parser::ProcComponentRef &x) { Walk(x); },
|
|
},
|
|
std::get<parser::ProcedureDesignator>(call.t).u);
|
|
Walk(std::get<std::list<parser::ActualArgSpec>>(call.t));
|
|
}
|
|
|
|
void ResolveNamesVisitor::HandleProcedureName(
|
|
Symbol::Flag flag, const parser::Name &name) {
|
|
CHECK(flag == Symbol::Flag::Function || flag == Symbol::Flag::Subroutine);
|
|
auto *symbol{FindSymbol(name)};
|
|
if (!symbol) {
|
|
if (context().intrinsics().IsIntrinsic(name.source.ToString())) {
|
|
symbol =
|
|
&MakeSymbol(InclusiveScope(), name.source, Attrs{Attr::INTRINSIC});
|
|
} else {
|
|
symbol = &MakeSymbol(context().globalScope(), name.source, Attrs{});
|
|
}
|
|
Resolve(name, *symbol);
|
|
if (symbol->has<ModuleDetails>()) {
|
|
SayWithDecl(name, *symbol,
|
|
"Use of '%s' as a procedure conflicts with its declaration"_err_en_US);
|
|
return;
|
|
}
|
|
if (!symbol->attrs().test(Attr::INTRINSIC)) {
|
|
if (isImplicitNoneExternal() && !symbol->attrs().test(Attr::EXTERNAL)) {
|
|
Say(name,
|
|
"'%s' is an external procedure without the EXTERNAL"
|
|
" attribute in a scope with IMPLICIT NONE(EXTERNAL)"_err_en_US);
|
|
return;
|
|
}
|
|
MakeExternal(*symbol);
|
|
}
|
|
ConvertToProcEntity(*symbol);
|
|
SetProcFlag(name, *symbol, flag);
|
|
} else if (symbol->has<UnknownDetails>()) {
|
|
DIE("unexpected UnknownDetails");
|
|
} else if (CheckUseError(name)) {
|
|
// error was reported
|
|
} else {
|
|
symbol = &Resolve(name, symbol)->GetUltimate();
|
|
ConvertToProcEntity(*symbol);
|
|
if (!SetProcFlag(name, *symbol, flag)) {
|
|
return; // reported error
|
|
}
|
|
if (IsProcedure(*symbol) || symbol->has<DerivedTypeDetails>() ||
|
|
symbol->has<ObjectEntityDetails>() ||
|
|
symbol->has<AssocEntityDetails>()) {
|
|
// Symbols with DerivedTypeDetails, ObjectEntityDetails and
|
|
// AssocEntityDetails are accepted here as procedure-designators because
|
|
// this means the related FunctionReference are mis-parsed structure
|
|
// constructors or array references that will be fixed later when
|
|
// analyzing expressions.
|
|
} else if (symbol->test(Symbol::Flag::Implicit)) {
|
|
Say(name,
|
|
"Use of '%s' as a procedure conflicts with its implicit definition"_err_en_US);
|
|
} else {
|
|
SayWithDecl(name, *symbol,
|
|
"Use of '%s' as a procedure conflicts with its declaration"_err_en_US);
|
|
}
|
|
}
|
|
}
|
|
|
|
// Variant of HandleProcedureName() for use while skimming the executable
|
|
// part of a subprogram to catch calls to dummy procedures that are part
|
|
// of the subprogram's interface, and to mark as procedures any symbols
|
|
// that might otherwise have been miscategorized as objects.
|
|
void ResolveNamesVisitor::NoteExecutablePartCall(
|
|
Symbol::Flag flag, const parser::Call &call) {
|
|
auto &designator{std::get<parser::ProcedureDesignator>(call.t)};
|
|
if (const auto *name{std::get_if<parser::Name>(&designator.u)}) {
|
|
// Subtlety: The symbol pointers in the parse tree are not set, because
|
|
// they might end up resolving elsewhere (e.g., construct entities in
|
|
// SELECT TYPE).
|
|
if (Symbol * symbol{currScope().FindSymbol(name->source)}) {
|
|
Symbol::Flag other{flag == Symbol::Flag::Subroutine
|
|
? Symbol::Flag::Function
|
|
: Symbol::Flag::Subroutine};
|
|
if (!symbol->test(other)) {
|
|
ConvertToProcEntity(*symbol);
|
|
if (symbol->has<ProcEntityDetails>()) {
|
|
symbol->set(flag);
|
|
if (symbol->IsDummy()) {
|
|
symbol->attrs().set(Attr::EXTERNAL);
|
|
}
|
|
ApplyImplicitRules(*symbol);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
// Check and set the Function or Subroutine flag on symbol; false on error.
|
|
bool ResolveNamesVisitor::SetProcFlag(
|
|
const parser::Name &name, Symbol &symbol, Symbol::Flag flag) {
|
|
if (symbol.test(Symbol::Flag::Function) && flag == Symbol::Flag::Subroutine) {
|
|
SayWithDecl(
|
|
name, symbol, "Cannot call function '%s' like a subroutine"_err_en_US);
|
|
return false;
|
|
} else if (symbol.test(Symbol::Flag::Subroutine) &&
|
|
flag == Symbol::Flag::Function) {
|
|
SayWithDecl(
|
|
name, symbol, "Cannot call subroutine '%s' like a function"_err_en_US);
|
|
return false;
|
|
} else if (symbol.has<ProcEntityDetails>()) {
|
|
symbol.set(flag); // in case it hasn't been set yet
|
|
if (flag == Symbol::Flag::Function) {
|
|
ApplyImplicitRules(symbol);
|
|
}
|
|
} else if (symbol.GetType() && flag == Symbol::Flag::Subroutine) {
|
|
SayWithDecl(
|
|
name, symbol, "Cannot call function '%s' like a subroutine"_err_en_US);
|
|
}
|
|
return true;
|
|
}
|
|
|
|
bool ModuleVisitor::Pre(const parser::AccessStmt &x) {
|
|
Attr accessAttr{AccessSpecToAttr(std::get<parser::AccessSpec>(x.t))};
|
|
if (!currScope().IsModule()) { // C869
|
|
Say(currStmtSource().value(),
|
|
"%s statement may only appear in the specification part of a module"_err_en_US,
|
|
EnumToString(accessAttr));
|
|
return false;
|
|
}
|
|
const auto &accessIds{std::get<std::list<parser::AccessId>>(x.t)};
|
|
if (accessIds.empty()) {
|
|
if (prevAccessStmt_) { // C869
|
|
Say("The default accessibility of this module has already been declared"_err_en_US)
|
|
.Attach(*prevAccessStmt_, "Previous declaration"_en_US);
|
|
}
|
|
prevAccessStmt_ = currStmtSource();
|
|
defaultAccess_ = accessAttr;
|
|
} else {
|
|
for (const auto &accessId : accessIds) {
|
|
std::visit(
|
|
common::visitors{
|
|
[=](const parser::Name &y) {
|
|
Resolve(y, SetAccess(y.source, accessAttr));
|
|
},
|
|
[=](const Indirection<parser::GenericSpec> &y) {
|
|
auto info{GenericSpecInfo{y.value()}};
|
|
const auto &symbolName{info.symbolName()};
|
|
if (auto *symbol{info.FindInScope(context(), currScope())}) {
|
|
info.Resolve(&SetAccess(symbolName, accessAttr, symbol));
|
|
} else if (info.kind().IsName()) {
|
|
info.Resolve(&SetAccess(symbolName, accessAttr));
|
|
} else {
|
|
Say(symbolName, "Generic spec '%s' not found"_err_en_US);
|
|
}
|
|
},
|
|
},
|
|
accessId.u);
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|
|
// Set the access specification for this symbol.
|
|
Symbol &ModuleVisitor::SetAccess(
|
|
const SourceName &name, Attr attr, Symbol *symbol) {
|
|
if (!symbol) {
|
|
symbol = &MakeSymbol(name);
|
|
}
|
|
Attrs &attrs{symbol->attrs()};
|
|
if (attrs.HasAny({Attr::PUBLIC, Attr::PRIVATE})) {
|
|
// PUBLIC/PRIVATE already set: make it a fatal error if it changed
|
|
Attr prev = attrs.test(Attr::PUBLIC) ? Attr::PUBLIC : Attr::PRIVATE;
|
|
auto msg{IsDefinedOperator(name)
|
|
? "The accessibility of operator '%s' has already been specified as %s"_en_US
|
|
: "The accessibility of '%s' has already been specified as %s"_en_US};
|
|
Say(name, WithIsFatal(msg, attr != prev), name, EnumToString(prev));
|
|
} else {
|
|
attrs.set(attr);
|
|
}
|
|
return *symbol;
|
|
}
|
|
|
|
static bool NeedsExplicitType(const Symbol &symbol) {
|
|
if (symbol.has<UnknownDetails>()) {
|
|
return true;
|
|
} else if (const auto *details{symbol.detailsIf<EntityDetails>()}) {
|
|
return !details->type();
|
|
} else if (const auto *details{symbol.detailsIf<ObjectEntityDetails>()}) {
|
|
return !details->type();
|
|
} else if (const auto *details{symbol.detailsIf<ProcEntityDetails>()}) {
|
|
return !details->interface().symbol() && !details->interface().type();
|
|
} else {
|
|
return false;
|
|
}
|
|
}
|
|
|
|
bool ResolveNamesVisitor::Pre(const parser::SpecificationPart &x) {
|
|
Walk(std::get<0>(x.t));
|
|
Walk(std::get<1>(x.t));
|
|
Walk(std::get<2>(x.t));
|
|
Walk(std::get<3>(x.t));
|
|
const std::list<parser::DeclarationConstruct> &decls{std::get<4>(x.t)};
|
|
for (const auto &decl : decls) {
|
|
if (const auto *spec{
|
|
std::get_if<parser::SpecificationConstruct>(&decl.u)}) {
|
|
PreSpecificationConstruct(*spec);
|
|
}
|
|
}
|
|
Walk(decls);
|
|
FinishSpecificationPart();
|
|
return false;
|
|
}
|
|
|
|
// Initial processing on specification constructs, before visiting them.
|
|
void ResolveNamesVisitor::PreSpecificationConstruct(
|
|
const parser::SpecificationConstruct &spec) {
|
|
std::visit(
|
|
common::visitors{
|
|
[&](const Indirection<parser::DerivedTypeDef> &) {},
|
|
[&](const parser::Statement<Indirection<parser::GenericStmt>> &y) {
|
|
CreateGeneric(std::get<parser::GenericSpec>(y.statement.value().t));
|
|
},
|
|
[&](const Indirection<parser::InterfaceBlock> &y) {
|
|
const auto &stmt{std::get<parser::Statement<parser::InterfaceStmt>>(
|
|
y.value().t)};
|
|
const auto *spec{std::get_if<std::optional<parser::GenericSpec>>(
|
|
&stmt.statement.u)};
|
|
if (spec && *spec) {
|
|
CreateGeneric(**spec);
|
|
}
|
|
},
|
|
[&](const auto &) {},
|
|
},
|
|
spec.u);
|
|
}
|
|
|
|
void ResolveNamesVisitor::CreateGeneric(const parser::GenericSpec &x) {
|
|
auto info{GenericSpecInfo{x}};
|
|
const SourceName &symbolName{info.symbolName()};
|
|
if (IsLogicalConstant(context(), symbolName)) {
|
|
Say(symbolName,
|
|
"Logical constant '%s' may not be used as a defined operator"_err_en_US);
|
|
return;
|
|
}
|
|
GenericDetails genericDetails;
|
|
if (Symbol * existing{info.FindInScope(context(), currScope())}) {
|
|
if (existing->has<GenericDetails>()) {
|
|
info.Resolve(existing);
|
|
return; // already have generic, add to it
|
|
}
|
|
Symbol &ultimate{existing->GetUltimate()};
|
|
if (auto *ultimateDetails{ultimate.detailsIf<GenericDetails>()}) {
|
|
genericDetails.CopyFrom(*ultimateDetails);
|
|
} else if (ultimate.has<SubprogramDetails>() ||
|
|
ultimate.has<SubprogramNameDetails>()) {
|
|
genericDetails.set_specific(ultimate);
|
|
} else if (ultimate.has<DerivedTypeDetails>()) {
|
|
genericDetails.set_derivedType(ultimate);
|
|
} else {
|
|
SayAlreadyDeclared(symbolName, *existing);
|
|
}
|
|
EraseSymbol(*existing);
|
|
}
|
|
info.Resolve(&MakeSymbol(symbolName, Attrs{}, std::move(genericDetails)));
|
|
}
|
|
|
|
void ResolveNamesVisitor::FinishSpecificationPart() {
|
|
badStmtFuncFound_ = false;
|
|
CheckImports();
|
|
bool inModule{currScope().kind() == Scope::Kind::Module};
|
|
for (auto &pair : currScope()) {
|
|
auto &symbol{*pair.second};
|
|
if (NeedsExplicitType(symbol)) {
|
|
ApplyImplicitRules(symbol);
|
|
}
|
|
if (symbol.has<GenericDetails>()) {
|
|
CheckGenericProcedures(symbol);
|
|
}
|
|
if (inModule && symbol.attrs().test(Attr::EXTERNAL) &&
|
|
!symbol.test(Symbol::Flag::Function)) {
|
|
// in a module, external proc without return type is subroutine
|
|
symbol.set(Symbol::Flag::Subroutine);
|
|
}
|
|
}
|
|
currScope().InstantiateDerivedTypes(context());
|
|
// TODO: what about instantiations in BLOCK?
|
|
CheckSaveStmts();
|
|
CheckCommonBlocks();
|
|
CheckEquivalenceSets();
|
|
}
|
|
|
|
void ResolveNamesVisitor::CheckImports() {
|
|
auto &scope{currScope()};
|
|
switch (scope.GetImportKind()) {
|
|
case common::ImportKind::None:
|
|
break;
|
|
case common::ImportKind::All:
|
|
// C8102: all entities in host must not be hidden
|
|
for (const auto &pair : scope.parent()) {
|
|
auto &name{pair.first};
|
|
std::optional<SourceName> scopeName{scope.GetName()};
|
|
if (!scopeName || name != *scopeName) {
|
|
CheckImport(prevImportStmt_.value(), name);
|
|
}
|
|
}
|
|
break;
|
|
case common::ImportKind::Default:
|
|
case common::ImportKind::Only:
|
|
// C8102: entities named in IMPORT must not be hidden
|
|
for (auto &name : scope.importNames()) {
|
|
CheckImport(name, name);
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
|
|
void ResolveNamesVisitor::CheckImport(
|
|
const SourceName &location, const SourceName &name) {
|
|
if (auto *symbol{FindInScope(currScope(), name)}) {
|
|
Say(location, "'%s' from host is not accessible"_err_en_US, name)
|
|
.Attach(symbol->name(), "'%s' is hidden by this entity"_en_US,
|
|
symbol->name());
|
|
}
|
|
}
|
|
|
|
bool ResolveNamesVisitor::Pre(const parser::ImplicitStmt &x) {
|
|
return CheckNotInBlock("IMPLICIT") && // C1107
|
|
ImplicitRulesVisitor::Pre(x);
|
|
}
|
|
|
|
void ResolveNamesVisitor::Post(const parser::PointerObject &x) {
|
|
std::visit(common::visitors{
|
|
[&](const parser::Name &x) { ResolveName(x); },
|
|
[&](const parser::StructureComponent &x) {
|
|
ResolveStructureComponent(x);
|
|
},
|
|
},
|
|
x.u);
|
|
}
|
|
void ResolveNamesVisitor::Post(const parser::AllocateObject &x) {
|
|
std::visit(common::visitors{
|
|
[&](const parser::Name &x) { ResolveName(x); },
|
|
[&](const parser::StructureComponent &x) {
|
|
ResolveStructureComponent(x);
|
|
},
|
|
},
|
|
x.u);
|
|
}
|
|
|
|
bool ResolveNamesVisitor::Pre(const parser::PointerAssignmentStmt &x) {
|
|
const auto &dataRef{std::get<parser::DataRef>(x.t)};
|
|
const auto &bounds{std::get<parser::PointerAssignmentStmt::Bounds>(x.t)};
|
|
const auto &expr{std::get<parser::Expr>(x.t)};
|
|
ResolveDataRef(dataRef);
|
|
Walk(bounds);
|
|
// Resolve unrestricted specific intrinsic procedures as in "p => cos".
|
|
if (const parser::Name * name{parser::Unwrap<parser::Name>(expr)}) {
|
|
if (NameIsKnownOrIntrinsic(*name)) {
|
|
return false;
|
|
}
|
|
}
|
|
Walk(expr);
|
|
return false;
|
|
}
|
|
void ResolveNamesVisitor::Post(const parser::Designator &x) {
|
|
ResolveDesignator(x);
|
|
}
|
|
|
|
void ResolveNamesVisitor::Post(const parser::ProcComponentRef &x) {
|
|
ResolveStructureComponent(x.v.thing);
|
|
}
|
|
void ResolveNamesVisitor::Post(const parser::TypeGuardStmt &x) {
|
|
DeclTypeSpecVisitor::Post(x);
|
|
ConstructVisitor::Post(x);
|
|
}
|
|
bool ResolveNamesVisitor::Pre(const parser::StmtFunctionStmt &x) {
|
|
CheckNotInBlock("STATEMENT FUNCTION"); // C1107
|
|
if (HandleStmtFunction(x)) {
|
|
return false;
|
|
} else {
|
|
// This is an array element assignment: resolve names of indices
|
|
const auto &names{std::get<std::list<parser::Name>>(x.t)};
|
|
for (auto &name : names) {
|
|
ResolveName(name);
|
|
}
|
|
return true;
|
|
}
|
|
}
|
|
|
|
bool ResolveNamesVisitor::Pre(const parser::DefinedOpName &x) {
|
|
const parser::Name &name{x.v};
|
|
if (FindSymbol(name)) {
|
|
// OK
|
|
} else if (IsLogicalConstant(context(), name.source)) {
|
|
Say(name,
|
|
"Logical constant '%s' may not be used as a defined operator"_err_en_US);
|
|
} else {
|
|
// Resolved later in expression semantics
|
|
MakePlaceholder(name, MiscDetails::Kind::TypeBoundDefinedOp);
|
|
}
|
|
return false;
|
|
}
|
|
|
|
void ResolveNamesVisitor::Post(const parser::AssignStmt &x) {
|
|
if (auto *name{ResolveName(std::get<parser::Name>(x.t))}) {
|
|
ConvertToObjectEntity(DEREF(name->symbol));
|
|
}
|
|
}
|
|
void ResolveNamesVisitor::Post(const parser::AssignedGotoStmt &x) {
|
|
if (auto *name{ResolveName(std::get<parser::Name>(x.t))}) {
|
|
ConvertToObjectEntity(DEREF(name->symbol));
|
|
}
|
|
}
|
|
|
|
bool ResolveNamesVisitor::Pre(const parser::ProgramUnit &x) {
|
|
auto root{ProgramTree::Build(x)};
|
|
SetScope(context().globalScope());
|
|
ResolveSpecificationParts(root);
|
|
FinishSpecificationParts(root);
|
|
inExecutionPart_ = true;
|
|
ResolveExecutionParts(root);
|
|
inExecutionPart_ = false;
|
|
ResolveOmpParts(x);
|
|
return false;
|
|
}
|
|
|
|
// References to procedures need to record that their symbols are known
|
|
// to be procedures, so that they don't get converted to objects by default.
|
|
class ExecutionPartSkimmer {
|
|
public:
|
|
explicit ExecutionPartSkimmer(ResolveNamesVisitor &resolver)
|
|
: resolver_{resolver} {}
|
|
|
|
void Walk(const parser::ExecutionPart *exec) {
|
|
if (exec) {
|
|
parser::Walk(*exec, *this);
|
|
}
|
|
}
|
|
|
|
template <typename A> bool Pre(const A &) { return true; }
|
|
template <typename A> void Post(const A &) {}
|
|
void Post(const parser::FunctionReference &fr) {
|
|
resolver_.NoteExecutablePartCall(Symbol::Flag::Function, fr.v);
|
|
}
|
|
void Post(const parser::CallStmt &cs) {
|
|
resolver_.NoteExecutablePartCall(Symbol::Flag::Subroutine, cs.v);
|
|
}
|
|
|
|
private:
|
|
ResolveNamesVisitor &resolver_;
|
|
};
|
|
|
|
// Build the scope tree and resolve names in the specification parts of this
|
|
// node and its children
|
|
void ResolveNamesVisitor::ResolveSpecificationParts(ProgramTree &node) {
|
|
if (node.isSpecificationPartResolved()) {
|
|
return; // been here already
|
|
}
|
|
node.set_isSpecificationPartResolved();
|
|
if (!BeginScopeForNode(node)) {
|
|
return; // an error prevented scope from being created
|
|
}
|
|
Scope &scope{currScope()};
|
|
node.set_scope(scope);
|
|
AddSubpNames(node);
|
|
std::visit(
|
|
[&](const auto *x) {
|
|
if (x) {
|
|
Walk(*x);
|
|
}
|
|
},
|
|
node.stmt());
|
|
Walk(node.spec());
|
|
// If this is a function, convert result to an object. This is to prevent the
|
|
// result to be converted later to a function symbol if it is called inside
|
|
// the function.
|
|
// If the result is function pointer, then ConvertToObjectEntity will not
|
|
// convert the result to an object, and calling the symbol inside the function
|
|
// will result in calls to the result pointer.
|
|
// A function cannot be called recursively if RESULT was not used to define a
|
|
// distinct result name (15.6.2.2 point 4.).
|
|
if (Symbol * symbol{scope.symbol()}) {
|
|
if (auto *details{symbol->detailsIf<SubprogramDetails>()}) {
|
|
if (details->isFunction()) {
|
|
ConvertToObjectEntity(const_cast<Symbol &>(details->result()));
|
|
}
|
|
}
|
|
}
|
|
if (node.IsModule()) {
|
|
ApplyDefaultAccess();
|
|
}
|
|
for (auto &child : node.children()) {
|
|
ResolveSpecificationParts(child);
|
|
}
|
|
ExecutionPartSkimmer{*this}.Walk(node.exec());
|
|
PopScope();
|
|
// Ensure that every object entity has a type.
|
|
for (auto &pair : *node.scope()) {
|
|
ApplyImplicitRules(*pair.second);
|
|
}
|
|
}
|
|
|
|
// Add SubprogramNameDetails symbols for module and internal subprograms
|
|
void ResolveNamesVisitor::AddSubpNames(ProgramTree &node) {
|
|
auto kind{
|
|
node.IsModule() ? SubprogramKind::Module : SubprogramKind::Internal};
|
|
for (auto &child : node.children()) {
|
|
auto &symbol{MakeSymbol(child.name(), SubprogramNameDetails{kind, child})};
|
|
symbol.set(child.GetSubpFlag());
|
|
}
|
|
}
|
|
|
|
// Push a new scope for this node or return false on error.
|
|
bool ResolveNamesVisitor::BeginScopeForNode(const ProgramTree &node) {
|
|
switch (node.GetKind()) {
|
|
SWITCH_COVERS_ALL_CASES
|
|
case ProgramTree::Kind::Program:
|
|
PushScope(Scope::Kind::MainProgram,
|
|
&MakeSymbol(node.name(), MainProgramDetails{}));
|
|
return true;
|
|
case ProgramTree::Kind::Function:
|
|
case ProgramTree::Kind::Subroutine:
|
|
return BeginSubprogram(
|
|
node.name(), node.GetSubpFlag(), node.HasModulePrefix());
|
|
case ProgramTree::Kind::MpSubprogram:
|
|
return BeginMpSubprogram(node.name());
|
|
case ProgramTree::Kind::Module:
|
|
BeginModule(node.name(), false);
|
|
return true;
|
|
case ProgramTree::Kind::Submodule:
|
|
return BeginSubmodule(node.name(), node.GetParentId());
|
|
case ProgramTree::Kind::BlockData:
|
|
PushBlockDataScope(node.name());
|
|
return true;
|
|
}
|
|
}
|
|
|
|
// Some analyses and checks, such as the processing of initializers of
|
|
// pointers, are deferred until all of the pertinent specification parts
|
|
// have been visited. This deferred processing enables the use of forward
|
|
// references in these circumstances.
|
|
class DeferredCheckVisitor {
|
|
public:
|
|
explicit DeferredCheckVisitor(ResolveNamesVisitor &resolver)
|
|
: resolver_{resolver} {}
|
|
|
|
template <typename A> void Walk(const A &x) { parser::Walk(x, *this); }
|
|
|
|
template <typename A> bool Pre(const A &) { return true; }
|
|
template <typename A> void Post(const A &) {}
|
|
|
|
void Post(const parser::DerivedTypeStmt &x) {
|
|
const auto &name{std::get<parser::Name>(x.t)};
|
|
if (Symbol * symbol{name.symbol}) {
|
|
if (Scope * scope{symbol->scope()}) {
|
|
if (scope->IsDerivedType()) {
|
|
resolver_.PushScope(*scope);
|
|
pushedScope_ = true;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
void Post(const parser::EndTypeStmt &) {
|
|
if (pushedScope_) {
|
|
resolver_.PopScope();
|
|
pushedScope_ = false;
|
|
}
|
|
}
|
|
|
|
void Post(const parser::ProcInterface &pi) {
|
|
if (const auto *name{std::get_if<parser::Name>(&pi.u)}) {
|
|
resolver_.CheckExplicitInterface(*name);
|
|
}
|
|
}
|
|
bool Pre(const parser::EntityDecl &decl) {
|
|
Init(std::get<parser::Name>(decl.t),
|
|
std::get<std::optional<parser::Initialization>>(decl.t));
|
|
return false;
|
|
}
|
|
bool Pre(const parser::ComponentDecl &decl) {
|
|
Init(std::get<parser::Name>(decl.t),
|
|
std::get<std::optional<parser::Initialization>>(decl.t));
|
|
return false;
|
|
}
|
|
bool Pre(const parser::ProcDecl &decl) {
|
|
if (const auto &init{
|
|
std::get<std::optional<parser::ProcPointerInit>>(decl.t)}) {
|
|
resolver_.PointerInitialization(std::get<parser::Name>(decl.t), *init);
|
|
}
|
|
return false;
|
|
}
|
|
void Post(const parser::TypeBoundProcedureStmt::WithInterface &tbps) {
|
|
resolver_.CheckExplicitInterface(tbps.interfaceName);
|
|
}
|
|
void Post(const parser::TypeBoundProcedureStmt::WithoutInterface &tbps) {
|
|
if (pushedScope_) {
|
|
resolver_.CheckBindings(tbps);
|
|
}
|
|
}
|
|
|
|
private:
|
|
void Init(const parser::Name &name,
|
|
const std::optional<parser::Initialization> &init) {
|
|
if (init) {
|
|
if (const auto *target{
|
|
std::get_if<parser::InitialDataTarget>(&init->u)}) {
|
|
resolver_.PointerInitialization(name, *target);
|
|
}
|
|
}
|
|
}
|
|
|
|
ResolveNamesVisitor &resolver_;
|
|
bool pushedScope_{false};
|
|
};
|
|
|
|
bool OmpAttributeVisitor::Pre(const parser::OpenMPBlockConstruct &x) {
|
|
const auto &beginBlockDir{std::get<parser::OmpBeginBlockDirective>(x.t)};
|
|
const auto &beginDir{std::get<parser::OmpBlockDirective>(beginBlockDir.t)};
|
|
switch (beginDir.v) {
|
|
case parser::OmpBlockDirective::Directive::Master:
|
|
PushContext(beginDir.source, OmpDirective::MASTER);
|
|
break;
|
|
case parser::OmpBlockDirective::Directive::Ordered:
|
|
PushContext(beginDir.source, OmpDirective::ORDERED);
|
|
break;
|
|
case parser::OmpBlockDirective::Directive::Parallel:
|
|
PushContext(beginDir.source, OmpDirective::PARALLEL);
|
|
break;
|
|
case parser::OmpBlockDirective::Directive::Single:
|
|
PushContext(beginDir.source, OmpDirective::SINGLE);
|
|
break;
|
|
case parser::OmpBlockDirective::Directive::Target:
|
|
PushContext(beginDir.source, OmpDirective::TARGET);
|
|
break;
|
|
case parser::OmpBlockDirective::Directive::TargetData:
|
|
PushContext(beginDir.source, OmpDirective::TARGET_DATA);
|
|
break;
|
|
case parser::OmpBlockDirective::Directive::Task:
|
|
PushContext(beginDir.source, OmpDirective::TASK);
|
|
break;
|
|
case parser::OmpBlockDirective::Directive::Teams:
|
|
PushContext(beginDir.source, OmpDirective::TEAMS);
|
|
break;
|
|
case parser::OmpBlockDirective::Directive::Workshare:
|
|
PushContext(beginDir.source, OmpDirective::WORKSHARE);
|
|
break;
|
|
default:
|
|
// TODO others
|
|
break;
|
|
}
|
|
ClearDataSharingAttributeObjects();
|
|
return true;
|
|
}
|
|
|
|
bool OmpAttributeVisitor::Pre(const parser::OpenMPLoopConstruct &x) {
|
|
const auto &beginLoopDir{std::get<parser::OmpBeginLoopDirective>(x.t)};
|
|
const auto &beginDir{std::get<parser::OmpLoopDirective>(beginLoopDir.t)};
|
|
const auto &clauseList{std::get<parser::OmpClauseList>(beginLoopDir.t)};
|
|
switch (beginDir.v) {
|
|
case parser::OmpLoopDirective::Directive::Distribute:
|
|
PushContext(beginDir.source, OmpDirective::DISTRIBUTE);
|
|
break;
|
|
case parser::OmpLoopDirective::Directive::DistributeParallelDo:
|
|
PushContext(beginDir.source, OmpDirective::DISTRIBUTE_PARALLEL_DO);
|
|
break;
|
|
case parser::OmpLoopDirective::Directive::DistributeParallelDoSimd:
|
|
PushContext(beginDir.source, OmpDirective::DISTRIBUTE_PARALLEL_DO_SIMD);
|
|
break;
|
|
case parser::OmpLoopDirective::Directive::DistributeSimd:
|
|
PushContext(beginDir.source, OmpDirective::DISTRIBUTE_SIMD);
|
|
break;
|
|
case parser::OmpLoopDirective::Directive::Do:
|
|
PushContext(beginDir.source, OmpDirective::DO);
|
|
break;
|
|
case parser::OmpLoopDirective::Directive::DoSimd:
|
|
PushContext(beginDir.source, OmpDirective::DO_SIMD);
|
|
break;
|
|
case parser::OmpLoopDirective::Directive::ParallelDo:
|
|
PushContext(beginDir.source, OmpDirective::PARALLEL_DO);
|
|
break;
|
|
case parser::OmpLoopDirective::Directive::ParallelDoSimd:
|
|
PushContext(beginDir.source, OmpDirective::PARALLEL_DO_SIMD);
|
|
break;
|
|
case parser::OmpLoopDirective::Directive::Simd:
|
|
PushContext(beginDir.source, OmpDirective::SIMD);
|
|
break;
|
|
case parser::OmpLoopDirective::Directive::TargetParallelDo:
|
|
PushContext(beginDir.source, OmpDirective::TARGET_PARALLEL_DO);
|
|
break;
|
|
case parser::OmpLoopDirective::Directive::TargetParallelDoSimd:
|
|
PushContext(beginDir.source, OmpDirective::TARGET_PARALLEL_DO_SIMD);
|
|
break;
|
|
case parser::OmpLoopDirective::Directive::TargetTeamsDistribute:
|
|
PushContext(beginDir.source, OmpDirective::TARGET_TEAMS_DISTRIBUTE);
|
|
break;
|
|
case parser::OmpLoopDirective::Directive::TargetTeamsDistributeParallelDo:
|
|
PushContext(
|
|
beginDir.source, OmpDirective::TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO);
|
|
break;
|
|
case parser::OmpLoopDirective::Directive::TargetTeamsDistributeParallelDoSimd:
|
|
PushContext(beginDir.source,
|
|
OmpDirective::TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD);
|
|
break;
|
|
case parser::OmpLoopDirective::Directive::TargetTeamsDistributeSimd:
|
|
PushContext(beginDir.source, OmpDirective::TARGET_TEAMS_DISTRIBUTE_SIMD);
|
|
break;
|
|
case parser::OmpLoopDirective::Directive::TargetSimd:
|
|
PushContext(beginDir.source, OmpDirective::TARGET_SIMD);
|
|
break;
|
|
case parser::OmpLoopDirective::Directive::Taskloop:
|
|
PushContext(beginDir.source, OmpDirective::TASKLOOP);
|
|
break;
|
|
case parser::OmpLoopDirective::Directive::TaskloopSimd:
|
|
PushContext(beginDir.source, OmpDirective::TASKLOOP_SIMD);
|
|
break;
|
|
case parser::OmpLoopDirective::Directive::TeamsDistribute:
|
|
PushContext(beginDir.source, OmpDirective::TEAMS_DISTRIBUTE);
|
|
break;
|
|
case parser::OmpLoopDirective::Directive::TeamsDistributeParallelDo:
|
|
PushContext(beginDir.source, OmpDirective::TEAMS_DISTRIBUTE_PARALLEL_DO);
|
|
break;
|
|
case parser::OmpLoopDirective::Directive::TeamsDistributeParallelDoSimd:
|
|
PushContext(
|
|
beginDir.source, OmpDirective::TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD);
|
|
break;
|
|
case parser::OmpLoopDirective::Directive::TeamsDistributeSimd:
|
|
PushContext(beginDir.source, OmpDirective::TEAMS_DISTRIBUTE_SIMD);
|
|
break;
|
|
}
|
|
ClearDataSharingAttributeObjects();
|
|
SetContextAssociatedLoopLevel(GetAssociatedLoopLevelFromClauses(clauseList));
|
|
PrivatizeAssociatedLoopIndex(x);
|
|
return true;
|
|
}
|
|
|
|
const parser::Name &OmpAttributeVisitor::GetLoopIndex(
|
|
const parser::DoConstruct &x) {
|
|
auto &loopControl{x.GetLoopControl().value()};
|
|
using Bounds = parser::LoopControl::Bounds;
|
|
const Bounds &bounds{std::get<Bounds>(loopControl.u)};
|
|
return bounds.name.thing;
|
|
}
|
|
|
|
void OmpAttributeVisitor::ResolveSeqLoopIndexInParallelOrTaskConstruct(
|
|
const parser::Name &iv) {
|
|
auto targetIt{ompContext_.rbegin()};
|
|
for (;; ++targetIt) {
|
|
if (targetIt == ompContext_.rend()) {
|
|
return;
|
|
}
|
|
if (parallelSet.test(targetIt->directive) ||
|
|
taskGeneratingSet.test(targetIt->directive)) {
|
|
break;
|
|
}
|
|
}
|
|
if (auto *symbol{ResolveOmp(iv, Symbol::Flag::OmpPrivate, targetIt->scope)}) {
|
|
targetIt++;
|
|
symbol->set(Symbol::Flag::OmpPreDetermined);
|
|
iv.symbol = symbol; // adjust the symbol within region
|
|
for (auto it{ompContext_.rbegin()}; it != targetIt; ++it) {
|
|
AddToContextObjectWithDSA(*symbol, Symbol::Flag::OmpPrivate, *it);
|
|
}
|
|
}
|
|
}
|
|
|
|
// 2.15.1.1 Data-sharing Attribute Rules - Predetermined
|
|
// - A loop iteration variable for a sequential loop in a parallel
|
|
// or task generating construct is private in the innermost such
|
|
// construct that encloses the loop
|
|
bool OmpAttributeVisitor::Pre(const parser::DoConstruct &x) {
|
|
if (!ompContext_.empty() && GetContext().withinConstruct) {
|
|
if (const auto &iv{GetLoopIndex(x)}; iv.symbol) {
|
|
if (!iv.symbol->test(Symbol::Flag::OmpPreDetermined)) {
|
|
ResolveSeqLoopIndexInParallelOrTaskConstruct(iv);
|
|
} else {
|
|
// TODO: conflict checks with explicitly determined DSA
|
|
}
|
|
}
|
|
}
|
|
return true;
|
|
}
|
|
|
|
const parser::DoConstruct *OmpAttributeVisitor::GetDoConstructIf(
|
|
const parser::ExecutionPartConstruct &x) {
|
|
if (auto *y{std::get_if<parser::ExecutableConstruct>(&x.u)}) {
|
|
if (auto *z{std::get_if<Indirection<parser::DoConstruct>>(&y->u)}) {
|
|
return &z->value();
|
|
}
|
|
}
|
|
return nullptr;
|
|
}
|
|
|
|
std::size_t OmpAttributeVisitor::GetAssociatedLoopLevelFromClauses(
|
|
const parser::OmpClauseList &x) {
|
|
std::size_t orderedLevel{0};
|
|
std::size_t collapseLevel{0};
|
|
for (const auto &clause : x.v) {
|
|
if (const auto *orderedClause{
|
|
std::get_if<parser::OmpClause::Ordered>(&clause.u)}) {
|
|
if (const auto v{
|
|
evaluate::ToInt64(resolver_.EvaluateIntExpr(orderedClause->v))}) {
|
|
orderedLevel = *v;
|
|
}
|
|
}
|
|
if (const auto *collapseClause{
|
|
std::get_if<parser::OmpClause::Collapse>(&clause.u)}) {
|
|
if (const auto v{evaluate::ToInt64(
|
|
resolver_.EvaluateIntExpr(collapseClause->v))}) {
|
|
collapseLevel = *v;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (orderedLevel && (!collapseLevel || orderedLevel >= collapseLevel)) {
|
|
return orderedLevel;
|
|
} else if (!orderedLevel && collapseLevel) {
|
|
return collapseLevel;
|
|
} // orderedLevel < collapseLevel is an error handled in structural checks
|
|
return 1; // default is outermost loop
|
|
}
|
|
|
|
// 2.15.1.1 Data-sharing Attribute Rules - Predetermined
|
|
// - The loop iteration variable(s) in the associated do-loop(s) of a do,
|
|
// parallel do, taskloop, or distribute construct is (are) private.
|
|
// - The loop iteration variable in the associated do-loop of a simd construct
|
|
// with just one associated do-loop is linear with a linear-step that is the
|
|
// increment of the associated do-loop.
|
|
// - The loop iteration variables in the associated do-loops of a simd
|
|
// construct with multiple associated do-loops are lastprivate.
|
|
//
|
|
// TODO: This assumes that the do-loops association for collapse/ordered
|
|
// clause has been performed (the number of nested do-loops >= n).
|
|
void OmpAttributeVisitor::PrivatizeAssociatedLoopIndex(
|
|
const parser::OpenMPLoopConstruct &x) {
|
|
std::size_t level{GetContext().associatedLoopLevel};
|
|
Symbol::Flag ivDSA{Symbol::Flag::OmpPrivate};
|
|
if (simdSet.test(GetContext().directive)) {
|
|
if (level == 1) {
|
|
ivDSA = Symbol::Flag::OmpLinear;
|
|
} else {
|
|
ivDSA = Symbol::Flag::OmpLastPrivate;
|
|
}
|
|
}
|
|
|
|
auto &outer{std::get<std::optional<parser::DoConstruct>>(x.t)};
|
|
for (const parser::DoConstruct *loop{&*outer}; loop && level > 0; --level) {
|
|
// go through all the nested do-loops and resolve index variables
|
|
const parser::Name &iv{GetLoopIndex(*loop)};
|
|
if (auto *symbol{ResolveOmp(iv, ivDSA, currScope())}) {
|
|
symbol->set(Symbol::Flag::OmpPreDetermined);
|
|
iv.symbol = symbol; // adjust the symbol within region
|
|
AddToContextObjectWithDSA(*symbol, ivDSA);
|
|
}
|
|
|
|
const auto &block{std::get<parser::Block>(loop->t)};
|
|
const auto it{block.begin()};
|
|
loop = it != block.end() ? GetDoConstructIf(*it) : nullptr;
|
|
}
|
|
CHECK(level == 0);
|
|
}
|
|
|
|
bool OmpAttributeVisitor::Pre(const parser::OpenMPSectionsConstruct &x) {
|
|
const auto &beginSectionsDir{
|
|
std::get<parser::OmpBeginSectionsDirective>(x.t)};
|
|
const auto &beginDir{
|
|
std::get<parser::OmpSectionsDirective>(beginSectionsDir.t)};
|
|
switch (beginDir.v) {
|
|
case parser::OmpSectionsDirective::Directive::ParallelSections:
|
|
PushContext(beginDir.source, OmpDirective::PARALLEL_SECTIONS);
|
|
break;
|
|
case parser::OmpSectionsDirective::Directive::Sections:
|
|
PushContext(beginDir.source, OmpDirective::SECTIONS);
|
|
break;
|
|
}
|
|
ClearDataSharingAttributeObjects();
|
|
return true;
|
|
}
|
|
|
|
bool OmpAttributeVisitor::Pre(const parser::OpenMPThreadprivate &x) {
|
|
PushContext(x.source, OmpDirective::THREADPRIVATE);
|
|
const auto &list{std::get<parser::OmpObjectList>(x.t)};
|
|
ResolveOmpObjectList(list, Symbol::Flag::OmpThreadprivate);
|
|
return false;
|
|
}
|
|
|
|
void OmpAttributeVisitor::Post(const parser::OmpDefaultClause &x) {
|
|
if (!ompContext_.empty()) {
|
|
switch (x.v) {
|
|
case parser::OmpDefaultClause::Type::Private:
|
|
SetContextDefaultDSA(Symbol::Flag::OmpPrivate);
|
|
break;
|
|
case parser::OmpDefaultClause::Type::Firstprivate:
|
|
SetContextDefaultDSA(Symbol::Flag::OmpFirstPrivate);
|
|
break;
|
|
case parser::OmpDefaultClause::Type::Shared:
|
|
SetContextDefaultDSA(Symbol::Flag::OmpShared);
|
|
break;
|
|
case parser::OmpDefaultClause::Type::None:
|
|
SetContextDefaultDSA(Symbol::Flag::OmpNone);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
// For OpenMP constructs, check all the data-refs within the constructs
|
|
// and adjust the symbol for each Name if necessary
|
|
void OmpAttributeVisitor::Post(const parser::Name &name) {
|
|
auto *symbol{name.symbol};
|
|
if (symbol && !ompContext_.empty() && GetContext().withinConstruct) {
|
|
if (!symbol->owner().IsDerivedType() && !symbol->has<ProcEntityDetails>() &&
|
|
!IsObjectWithDSA(*symbol)) {
|
|
// TODO: create a separate function to go through the rules for
|
|
// predetermined, explicitly determined, and implicitly
|
|
// determined data-sharing attributes (2.15.1.1).
|
|
if (Symbol * found{currScope().FindSymbol(name.source)}) {
|
|
if (symbol != found) {
|
|
name.symbol = found; // adjust the symbol within region
|
|
} else if (GetContext().defaultDSA == Symbol::Flag::OmpNone) {
|
|
context_.Say(name.source,
|
|
"The DEFAULT(NONE) clause requires that '%s' must be listed in "
|
|
"a data-sharing attribute clause"_err_en_US,
|
|
symbol->name());
|
|
}
|
|
}
|
|
}
|
|
} // within OpenMP construct
|
|
}
|
|
|
|
bool OmpAttributeVisitor::HasDataSharingAttributeObject(const Symbol &object) {
|
|
auto it{dataSharingAttributeObjects_.find(object)};
|
|
return it != dataSharingAttributeObjects_.end();
|
|
}
|
|
|
|
Symbol *OmpAttributeVisitor::ResolveOmpCommonBlockName(
|
|
const parser::Name *name) {
|
|
if (auto *prev{name
|
|
? GetContext().scope.parent().FindCommonBlock(name->source)
|
|
: nullptr}) {
|
|
name->symbol = prev;
|
|
return prev;
|
|
} else {
|
|
return nullptr;
|
|
}
|
|
}
|
|
|
|
void OmpAttributeVisitor::ResolveOmpObjectList(
|
|
const parser::OmpObjectList &ompObjectList, Symbol::Flag ompFlag) {
|
|
for (const auto &ompObject : ompObjectList.v) {
|
|
ResolveOmpObject(ompObject, ompFlag);
|
|
}
|
|
}
|
|
|
|
void OmpAttributeVisitor::ResolveOmpObject(
|
|
const parser::OmpObject &ompObject, Symbol::Flag ompFlag) {
|
|
std::visit(
|
|
common::visitors{
|
|
[&](const parser::Designator &designator) {
|
|
if (const auto *name{GetDesignatorNameIfDataRef(designator)}) {
|
|
if (auto *symbol{ResolveOmp(*name, ompFlag, currScope())}) {
|
|
AddToContextObjectWithDSA(*symbol, ompFlag);
|
|
if (dataSharingAttributeFlags.test(ompFlag)) {
|
|
CheckMultipleAppearances(*name, *symbol, ompFlag);
|
|
}
|
|
}
|
|
} else if (const auto *designatorName{
|
|
resolver_.ResolveDesignator(designator)};
|
|
designatorName->symbol) {
|
|
// Array sections to be changed to substrings as needed
|
|
if (AnalyzeExpr(context_, designator)) {
|
|
if (std::holds_alternative<parser::Substring>(designator.u)) {
|
|
context_.Say(designator.source,
|
|
"Substrings are not allowed on OpenMP "
|
|
"directives or clauses"_err_en_US);
|
|
}
|
|
}
|
|
// other checks, more TBD
|
|
if (const auto *details{designatorName->symbol
|
|
->detailsIf<ObjectEntityDetails>()}) {
|
|
if (details->IsArray()) {
|
|
// TODO: check Array Sections
|
|
} else if (designatorName->symbol->owner().IsDerivedType()) {
|
|
// TODO: check Structure Component
|
|
}
|
|
}
|
|
}
|
|
},
|
|
[&](const parser::Name &name) { // common block
|
|
if (auto *symbol{ResolveOmpCommonBlockName(&name)}) {
|
|
CheckMultipleAppearances(
|
|
name, *symbol, Symbol::Flag::OmpCommonBlock);
|
|
// 2.15.3 When a named common block appears in a list, it has the
|
|
// same meaning as if every explicit member of the common block
|
|
// appeared in the list
|
|
for (const Symbol &object :
|
|
symbol->get<CommonBlockDetails>().objects()) {
|
|
Symbol &mutableObject{const_cast<Symbol &>(object)};
|
|
if (auto *resolvedObject{
|
|
ResolveOmp(mutableObject, ompFlag, currScope())}) {
|
|
AddToContextObjectWithDSA(*resolvedObject, ompFlag);
|
|
}
|
|
}
|
|
} else {
|
|
context_.Say(name.source, // 2.15.3
|
|
"COMMON block must be declared in the same scoping unit "
|
|
"in which the OpenMP directive or clause appears"_err_en_US);
|
|
}
|
|
},
|
|
},
|
|
ompObject.u);
|
|
}
|
|
|
|
Symbol *OmpAttributeVisitor::ResolveOmp(
|
|
const parser::Name &name, Symbol::Flag ompFlag, Scope &scope) {
|
|
if (ompFlagsRequireNewSymbol.test(ompFlag)) {
|
|
return DeclarePrivateAccessEntity(name, ompFlag, scope);
|
|
} else {
|
|
return DeclareOrMarkOtherAccessEntity(name, ompFlag);
|
|
}
|
|
}
|
|
|
|
Symbol *OmpAttributeVisitor::ResolveOmp(
|
|
Symbol &symbol, Symbol::Flag ompFlag, Scope &scope) {
|
|
if (ompFlagsRequireNewSymbol.test(ompFlag)) {
|
|
return DeclarePrivateAccessEntity(symbol, ompFlag, scope);
|
|
} else {
|
|
return DeclareOrMarkOtherAccessEntity(symbol, ompFlag);
|
|
}
|
|
}
|
|
|
|
Symbol *OmpAttributeVisitor::DeclarePrivateAccessEntity(
|
|
const parser::Name &name, Symbol::Flag ompFlag, Scope &scope) {
|
|
if (!name.symbol) {
|
|
return nullptr; // not resolved by Name Resolution step, do nothing
|
|
}
|
|
name.symbol = DeclarePrivateAccessEntity(*name.symbol, ompFlag, scope);
|
|
return name.symbol;
|
|
}
|
|
|
|
Symbol *OmpAttributeVisitor::DeclarePrivateAccessEntity(
|
|
Symbol &object, Symbol::Flag ompFlag, Scope &scope) {
|
|
if (object.owner() != currScope()) {
|
|
auto &symbol{MakeAssocSymbol(object.name(), object, scope)};
|
|
symbol.set(ompFlag);
|
|
return &symbol;
|
|
} else {
|
|
object.set(ompFlag);
|
|
return &object;
|
|
}
|
|
}
|
|
|
|
Symbol *OmpAttributeVisitor::DeclareOrMarkOtherAccessEntity(
|
|
const parser::Name &name, Symbol::Flag ompFlag) {
|
|
Symbol *prev{currScope().FindSymbol(name.source)};
|
|
if (!name.symbol || !prev) {
|
|
return nullptr;
|
|
} else if (prev != name.symbol) {
|
|
name.symbol = prev;
|
|
}
|
|
return DeclareOrMarkOtherAccessEntity(*prev, ompFlag);
|
|
}
|
|
|
|
Symbol *OmpAttributeVisitor::DeclareOrMarkOtherAccessEntity(
|
|
Symbol &object, Symbol::Flag ompFlag) {
|
|
if (ompFlagsRequireMark.test(ompFlag)) {
|
|
object.set(ompFlag);
|
|
}
|
|
return &object;
|
|
}
|
|
|
|
static bool WithMultipleAppearancesException(
|
|
const Symbol &symbol, Symbol::Flag ompFlag) {
|
|
return (ompFlag == Symbol::Flag::OmpFirstPrivate &&
|
|
symbol.test(Symbol::Flag::OmpLastPrivate)) ||
|
|
(ompFlag == Symbol::Flag::OmpLastPrivate &&
|
|
symbol.test(Symbol::Flag::OmpFirstPrivate));
|
|
}
|
|
|
|
void OmpAttributeVisitor::CheckMultipleAppearances(
|
|
const parser::Name &name, const Symbol &symbol, Symbol::Flag ompFlag) {
|
|
const auto *target{&symbol};
|
|
if (ompFlagsRequireNewSymbol.test(ompFlag)) {
|
|
if (const auto *details{symbol.detailsIf<HostAssocDetails>()}) {
|
|
target = &details->symbol();
|
|
}
|
|
}
|
|
if (HasDataSharingAttributeObject(*target) &&
|
|
!WithMultipleAppearancesException(symbol, ompFlag)) {
|
|
context_.Say(name.source,
|
|
"'%s' appears in more than one data-sharing clause "
|
|
"on the same OpenMP directive"_err_en_US,
|
|
name.ToString());
|
|
} else {
|
|
AddDataSharingAttributeObject(*target);
|
|
}
|
|
}
|
|
|
|
// Perform checks and completions that need to happen after all of
|
|
// the specification parts but before any of the execution parts.
|
|
void ResolveNamesVisitor::FinishSpecificationParts(const ProgramTree &node) {
|
|
if (!node.scope()) {
|
|
return; // error occurred creating scope
|
|
}
|
|
SetScope(*node.scope());
|
|
// The initializers of pointers, pointer components, and non-deferred
|
|
// type-bound procedure bindings have not yet been traversed.
|
|
// We do that now, when any (formerly) forward references that appear
|
|
// in those initializers will resolve to the right symbols.
|
|
DeferredCheckVisitor{*this}.Walk(node.spec());
|
|
DeferredCheckVisitor{*this}.Walk(node.exec()); // for BLOCK
|
|
for (Scope &childScope : currScope().children()) {
|
|
if (childScope.IsDerivedType() && !childScope.symbol()) {
|
|
FinishDerivedTypeInstantiation(childScope);
|
|
}
|
|
}
|
|
for (const auto &child : node.children()) {
|
|
FinishSpecificationParts(child);
|
|
}
|
|
}
|
|
|
|
// Fold object pointer initializer designators with the actual
|
|
// type parameter values of a particular instantiation.
|
|
void ResolveNamesVisitor::FinishDerivedTypeInstantiation(Scope &scope) {
|
|
CHECK(scope.IsDerivedType() && !scope.symbol());
|
|
if (DerivedTypeSpec * spec{scope.derivedTypeSpec()}) {
|
|
spec->Instantiate(currScope(), context());
|
|
const Symbol &origTypeSymbol{spec->typeSymbol()};
|
|
if (const Scope * origTypeScope{origTypeSymbol.scope()}) {
|
|
CHECK(origTypeScope->IsDerivedType() &&
|
|
origTypeScope->symbol() == &origTypeSymbol);
|
|
auto &foldingContext{GetFoldingContext()};
|
|
auto restorer{foldingContext.WithPDTInstance(*spec)};
|
|
for (auto &pair : scope) {
|
|
Symbol &comp{*pair.second};
|
|
const Symbol &origComp{DEREF(FindInScope(*origTypeScope, comp.name()))};
|
|
if (IsPointer(comp)) {
|
|
if (auto *details{comp.detailsIf<ObjectEntityDetails>()}) {
|
|
auto origDetails{origComp.get<ObjectEntityDetails>()};
|
|
if (const MaybeExpr & init{origDetails.init()}) {
|
|
SomeExpr newInit{*init};
|
|
MaybeExpr folded{
|
|
evaluate::Fold(foldingContext, std::move(newInit))};
|
|
details->set_init(std::move(folded));
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
// Resolve names in the execution part of this node and its children
|
|
void ResolveNamesVisitor::ResolveExecutionParts(const ProgramTree &node) {
|
|
if (!node.scope()) {
|
|
return; // error occurred creating scope
|
|
}
|
|
SetScope(*node.scope());
|
|
if (const auto *exec{node.exec()}) {
|
|
Walk(*exec);
|
|
}
|
|
PopScope(); // converts unclassified entities into objects
|
|
for (const auto &child : node.children()) {
|
|
ResolveExecutionParts(child);
|
|
}
|
|
}
|
|
|
|
void ResolveNamesVisitor::ResolveOmpParts(const parser::ProgramUnit &node) {
|
|
OmpAttributeVisitor{context(), *this}.Walk(node);
|
|
if (!context().AnyFatalError()) {
|
|
// The data-sharing attribute of the loop iteration variable for a
|
|
// sequential loop (2.15.1.1) can only be determined when visiting
|
|
// the corresponding DoConstruct, a second walk is to adjust the
|
|
// symbols for all the data-refs of that loop iteration variable
|
|
// prior to the DoConstruct.
|
|
OmpAttributeVisitor{context(), *this}.Walk(node);
|
|
}
|
|
}
|
|
|
|
void ResolveNamesVisitor::Post(const parser::Program &) {
|
|
// ensure that all temps were deallocated
|
|
CHECK(!attrs_);
|
|
CHECK(!GetDeclTypeSpec());
|
|
}
|
|
|
|
// A singleton instance of the scope -> IMPLICIT rules mapping is
|
|
// shared by all instances of ResolveNamesVisitor and accessed by this
|
|
// pointer when the visitors (other than the top-level original) are
|
|
// constructed.
|
|
static ImplicitRulesMap *sharedImplicitRulesMap{nullptr};
|
|
|
|
bool ResolveNames(SemanticsContext &context, const parser::Program &program) {
|
|
ImplicitRulesMap implicitRulesMap;
|
|
auto restorer{common::ScopedSet(sharedImplicitRulesMap, &implicitRulesMap)};
|
|
ResolveNamesVisitor{context, implicitRulesMap}.Walk(program);
|
|
return !context.AnyFatalError();
|
|
}
|
|
|
|
// Processes a module (but not internal) function when it is referenced
|
|
// in a specification expression in a sibling procedure.
|
|
void ResolveSpecificationParts(
|
|
SemanticsContext &context, const Symbol &subprogram) {
|
|
auto originalLocation{context.location()};
|
|
ResolveNamesVisitor visitor{context, DEREF(sharedImplicitRulesMap)};
|
|
ProgramTree &node{subprogram.get<SubprogramNameDetails>().node()};
|
|
const Scope &moduleScope{subprogram.owner()};
|
|
visitor.SetScope(const_cast<Scope &>(moduleScope));
|
|
visitor.ResolveSpecificationParts(node);
|
|
context.set_location(std::move(originalLocation));
|
|
}
|
|
} // namespace Fortran::semantics
|