forked from OSchip/llvm-project
953 lines
32 KiB
C++
953 lines
32 KiB
C++
//===-- lib/Semantics/check-io.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 "check-io.h"
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#include "flang/Common/format.h"
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#include "flang/Parser/tools.h"
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#include "flang/Semantics/expression.h"
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#include "flang/Semantics/tools.h"
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#include <unordered_map>
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namespace Fortran::semantics {
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// TODO: C1234, C1235 -- defined I/O constraints
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class FormatErrorReporter {
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public:
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FormatErrorReporter(SemanticsContext &context,
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const parser::CharBlock &formatCharBlock, int errorAllowance = 3)
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: context_{context}, formatCharBlock_{formatCharBlock},
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errorAllowance_{errorAllowance} {}
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bool Say(const common::FormatMessage &);
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private:
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SemanticsContext &context_;
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const parser::CharBlock &formatCharBlock_;
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int errorAllowance_; // initialized to maximum number of errors to report
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};
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bool FormatErrorReporter::Say(const common::FormatMessage &msg) {
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if (!msg.isError && !context_.warnOnNonstandardUsage()) {
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return false;
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}
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parser::MessageFormattedText text{
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parser::MessageFixedText(msg.text, strlen(msg.text), msg.isError),
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msg.arg};
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if (formatCharBlock_.size()) {
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// The input format is a folded expression. Error markers span the full
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// original unfolded expression in formatCharBlock_.
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context_.Say(formatCharBlock_, text);
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} else {
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// The input format is a source expression. Error markers have an offset
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// and length relative to the beginning of formatCharBlock_.
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parser::CharBlock messageCharBlock{
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parser::CharBlock(formatCharBlock_.begin() + msg.offset, msg.length)};
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context_.Say(messageCharBlock, text);
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}
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return msg.isError && --errorAllowance_ <= 0;
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}
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void IoChecker::Enter(
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const parser::Statement<common::Indirection<parser::FormatStmt>> &stmt) {
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if (!stmt.label) {
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context_.Say("Format statement must be labeled"_err_en_US); // C1301
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}
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const char *formatStart{static_cast<const char *>(
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std::memchr(stmt.source.begin(), '(', stmt.source.size()))};
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parser::CharBlock reporterCharBlock{formatStart, static_cast<std::size_t>(0)};
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FormatErrorReporter reporter{context_, reporterCharBlock};
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auto reporterWrapper{[&](const auto &msg) { return reporter.Say(msg); }};
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switch (context_.GetDefaultKind(TypeCategory::Character)) {
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case 1: {
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common::FormatValidator<char> validator{formatStart,
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stmt.source.size() - (formatStart - stmt.source.begin()),
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reporterWrapper};
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validator.Check();
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break;
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}
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case 2: { // TODO: Get this to work.
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common::FormatValidator<char16_t> validator{
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/*???*/ nullptr, /*???*/ 0, reporterWrapper};
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validator.Check();
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break;
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}
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case 4: { // TODO: Get this to work.
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common::FormatValidator<char32_t> validator{
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/*???*/ nullptr, /*???*/ 0, reporterWrapper};
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validator.Check();
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break;
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}
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default:
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CRASH_NO_CASE;
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}
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}
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void IoChecker::Enter(const parser::ConnectSpec &spec) {
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// ConnectSpec context FileNameExpr
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if (std::get_if<parser::FileNameExpr>(&spec.u)) {
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SetSpecifier(IoSpecKind::File);
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}
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}
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void IoChecker::Enter(const parser::ConnectSpec::CharExpr &spec) {
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IoSpecKind specKind{};
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using ParseKind = parser::ConnectSpec::CharExpr::Kind;
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switch (std::get<ParseKind>(spec.t)) {
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case ParseKind::Access:
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specKind = IoSpecKind::Access;
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break;
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case ParseKind::Action:
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specKind = IoSpecKind::Action;
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break;
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case ParseKind::Asynchronous:
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specKind = IoSpecKind::Asynchronous;
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break;
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case ParseKind::Blank:
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specKind = IoSpecKind::Blank;
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break;
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case ParseKind::Decimal:
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specKind = IoSpecKind::Decimal;
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break;
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case ParseKind::Delim:
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specKind = IoSpecKind::Delim;
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break;
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case ParseKind::Encoding:
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specKind = IoSpecKind::Encoding;
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break;
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case ParseKind::Form:
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specKind = IoSpecKind::Form;
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break;
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case ParseKind::Pad:
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specKind = IoSpecKind::Pad;
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break;
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case ParseKind::Position:
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specKind = IoSpecKind::Position;
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break;
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case ParseKind::Round:
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specKind = IoSpecKind::Round;
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break;
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case ParseKind::Sign:
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specKind = IoSpecKind::Sign;
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break;
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case ParseKind::Carriagecontrol:
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specKind = IoSpecKind::Carriagecontrol;
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break;
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case ParseKind::Convert:
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specKind = IoSpecKind::Convert;
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break;
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case ParseKind::Dispose:
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specKind = IoSpecKind::Dispose;
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break;
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}
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SetSpecifier(specKind);
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if (const std::optional<std::string> charConst{GetConstExpr<std::string>(
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std::get<parser::ScalarDefaultCharExpr>(spec.t))}) {
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std::string s{parser::ToUpperCaseLetters(*charConst)};
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if (specKind == IoSpecKind::Access) {
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flags_.set(Flag::KnownAccess);
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flags_.set(Flag::AccessDirect, s == "DIRECT");
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flags_.set(Flag::AccessStream, s == "STREAM");
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}
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CheckStringValue(specKind, *charConst, parser::FindSourceLocation(spec));
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if (specKind == IoSpecKind::Carriagecontrol &&
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(s == "FORTRAN" || s == "NONE")) {
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context_.Say(parser::FindSourceLocation(spec),
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"Unimplemented %s value '%s'"_err_en_US,
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parser::ToUpperCaseLetters(common::EnumToString(specKind)),
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*charConst);
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}
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}
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}
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void IoChecker::Enter(const parser::ConnectSpec::Newunit &var) {
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CheckForDefinableVariable(var, "NEWUNIT");
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SetSpecifier(IoSpecKind::Newunit);
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}
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void IoChecker::Enter(const parser::ConnectSpec::Recl &spec) {
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SetSpecifier(IoSpecKind::Recl);
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if (const std::optional<std::int64_t> recl{
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GetConstExpr<std::int64_t>(spec)}) {
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if (*recl <= 0) {
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context_.Say(parser::FindSourceLocation(spec),
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"RECL value (%jd) must be positive"_err_en_US,
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*recl); // 12.5.6.15
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}
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}
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}
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void IoChecker::Enter(const parser::EndLabel &) {
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SetSpecifier(IoSpecKind::End);
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}
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void IoChecker::Enter(const parser::EorLabel &) {
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SetSpecifier(IoSpecKind::Eor);
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}
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void IoChecker::Enter(const parser::ErrLabel &) {
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SetSpecifier(IoSpecKind::Err);
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}
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void IoChecker::Enter(const parser::FileUnitNumber &) {
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SetSpecifier(IoSpecKind::Unit);
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flags_.set(Flag::NumberUnit);
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}
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void IoChecker::Enter(const parser::Format &spec) {
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SetSpecifier(IoSpecKind::Fmt);
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flags_.set(Flag::FmtOrNml);
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std::visit(
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common::visitors{
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[&](const parser::Label &) { flags_.set(Flag::LabelFmt); },
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[&](const parser::Star &) { flags_.set(Flag::StarFmt); },
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[&](const parser::Expr &format) {
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const SomeExpr *expr{GetExpr(format)};
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if (!expr) {
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return;
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}
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auto type{expr->GetType()};
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if (!type ||
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(type->category() != TypeCategory::Integer &&
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type->category() != TypeCategory::Character) ||
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type->kind() !=
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context_.defaultKinds().GetDefaultKind(type->category())) {
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context_.Say(format.source,
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"Format expression must be default character or integer"_err_en_US);
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return;
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}
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if (type->category() == TypeCategory::Integer) {
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flags_.set(Flag::AssignFmt);
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if (expr->Rank() != 0 || !IsVariable(*expr)) {
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context_.Say(format.source,
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"Assigned format label must be a scalar variable"_err_en_US);
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}
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return;
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}
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flags_.set(Flag::CharFmt);
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const std::optional<std::string> constantFormat{
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GetConstExpr<std::string>(format)};
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if (!constantFormat) {
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return;
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}
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// validate constant format -- 12.6.2.2
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bool isFolded{constantFormat->size() != format.source.size() - 2};
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parser::CharBlock reporterCharBlock{isFolded
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? parser::CharBlock{format.source}
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: parser::CharBlock{format.source.begin() + 1,
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static_cast<std::size_t>(0)}};
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FormatErrorReporter reporter{context_, reporterCharBlock};
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auto reporterWrapper{
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[&](const auto &msg) { return reporter.Say(msg); }};
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switch (context_.GetDefaultKind(TypeCategory::Character)) {
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case 1: {
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common::FormatValidator<char> validator{constantFormat->c_str(),
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constantFormat->length(), reporterWrapper, stmt_};
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validator.Check();
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break;
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}
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case 2: {
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// TODO: Get this to work. (Maybe combine with earlier instance?)
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common::FormatValidator<char16_t> validator{
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/*???*/ nullptr, /*???*/ 0, reporterWrapper, stmt_};
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validator.Check();
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break;
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}
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case 4: {
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// TODO: Get this to work. (Maybe combine with earlier instance?)
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common::FormatValidator<char32_t> validator{
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/*???*/ nullptr, /*???*/ 0, reporterWrapper, stmt_};
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validator.Check();
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break;
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}
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default:
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CRASH_NO_CASE;
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}
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},
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},
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spec.u);
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}
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void IoChecker::Enter(const parser::IdExpr &) { SetSpecifier(IoSpecKind::Id); }
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void IoChecker::Enter(const parser::IdVariable &spec) {
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SetSpecifier(IoSpecKind::Id);
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const auto *expr{GetExpr(spec)};
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if (!expr || !expr->GetType()) {
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return;
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}
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CheckForDefinableVariable(spec, "ID");
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int kind{expr->GetType()->kind()};
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int defaultKind{context_.GetDefaultKind(TypeCategory::Integer)};
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if (kind < defaultKind) {
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context_.Say(
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"ID kind (%d) is smaller than default INTEGER kind (%d)"_err_en_US,
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std::move(kind), std::move(defaultKind)); // C1229
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}
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}
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void IoChecker::Enter(const parser::InputItem &spec) {
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flags_.set(Flag::DataList);
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const parser::Variable *var{std::get_if<parser::Variable>(&spec.u)};
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if (!var) {
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return;
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}
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CheckForDefinableVariable(*var, "Input");
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}
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void IoChecker::Enter(const parser::InquireSpec &spec) {
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// InquireSpec context FileNameExpr
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if (std::get_if<parser::FileNameExpr>(&spec.u)) {
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SetSpecifier(IoSpecKind::File);
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}
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}
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void IoChecker::Enter(const parser::InquireSpec::CharVar &spec) {
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IoSpecKind specKind{};
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using ParseKind = parser::InquireSpec::CharVar::Kind;
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switch (std::get<ParseKind>(spec.t)) {
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case ParseKind::Access:
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specKind = IoSpecKind::Access;
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break;
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case ParseKind::Action:
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specKind = IoSpecKind::Action;
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break;
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case ParseKind::Asynchronous:
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specKind = IoSpecKind::Asynchronous;
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break;
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case ParseKind::Blank:
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specKind = IoSpecKind::Blank;
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break;
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case ParseKind::Decimal:
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specKind = IoSpecKind::Decimal;
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break;
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case ParseKind::Delim:
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specKind = IoSpecKind::Delim;
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break;
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case ParseKind::Direct:
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specKind = IoSpecKind::Direct;
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break;
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case ParseKind::Encoding:
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specKind = IoSpecKind::Encoding;
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break;
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case ParseKind::Form:
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specKind = IoSpecKind::Form;
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break;
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case ParseKind::Formatted:
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specKind = IoSpecKind::Formatted;
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break;
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case ParseKind::Iomsg:
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specKind = IoSpecKind::Iomsg;
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break;
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case ParseKind::Name:
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specKind = IoSpecKind::Name;
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break;
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case ParseKind::Pad:
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specKind = IoSpecKind::Pad;
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break;
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case ParseKind::Position:
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specKind = IoSpecKind::Position;
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break;
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case ParseKind::Read:
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specKind = IoSpecKind::Read;
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break;
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case ParseKind::Readwrite:
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specKind = IoSpecKind::Readwrite;
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break;
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case ParseKind::Round:
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specKind = IoSpecKind::Round;
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break;
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case ParseKind::Sequential:
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specKind = IoSpecKind::Sequential;
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break;
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case ParseKind::Sign:
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specKind = IoSpecKind::Sign;
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break;
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case ParseKind::Status:
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specKind = IoSpecKind::Status;
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break;
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case ParseKind::Stream:
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specKind = IoSpecKind::Stream;
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break;
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case ParseKind::Unformatted:
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specKind = IoSpecKind::Unformatted;
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break;
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case ParseKind::Write:
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specKind = IoSpecKind::Write;
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break;
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case ParseKind::Carriagecontrol:
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specKind = IoSpecKind::Carriagecontrol;
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break;
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case ParseKind::Convert:
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specKind = IoSpecKind::Convert;
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break;
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case ParseKind::Dispose:
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specKind = IoSpecKind::Dispose;
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break;
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}
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CheckForDefinableVariable(std::get<parser::ScalarDefaultCharVariable>(spec.t),
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parser::ToUpperCaseLetters(common::EnumToString(specKind)));
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SetSpecifier(specKind);
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}
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void IoChecker::Enter(const parser::InquireSpec::IntVar &spec) {
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IoSpecKind specKind{};
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using ParseKind = parser::InquireSpec::IntVar::Kind;
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switch (std::get<parser::InquireSpec::IntVar::Kind>(spec.t)) {
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case ParseKind::Iostat:
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specKind = IoSpecKind::Iostat;
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break;
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case ParseKind::Nextrec:
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specKind = IoSpecKind::Nextrec;
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break;
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case ParseKind::Number:
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specKind = IoSpecKind::Number;
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break;
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case ParseKind::Pos:
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specKind = IoSpecKind::Pos;
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break;
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case ParseKind::Recl:
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specKind = IoSpecKind::Recl;
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break;
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case ParseKind::Size:
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specKind = IoSpecKind::Size;
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break;
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}
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CheckForDefinableVariable(std::get<parser::ScalarIntVariable>(spec.t),
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parser::ToUpperCaseLetters(common::EnumToString(specKind)));
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SetSpecifier(specKind);
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}
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void IoChecker::Enter(const parser::InquireSpec::LogVar &spec) {
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IoSpecKind specKind{};
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using ParseKind = parser::InquireSpec::LogVar::Kind;
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switch (std::get<parser::InquireSpec::LogVar::Kind>(spec.t)) {
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case ParseKind::Exist:
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specKind = IoSpecKind::Exist;
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break;
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case ParseKind::Named:
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specKind = IoSpecKind::Named;
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break;
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case ParseKind::Opened:
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specKind = IoSpecKind::Opened;
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break;
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case ParseKind::Pending:
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specKind = IoSpecKind::Pending;
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break;
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}
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SetSpecifier(specKind);
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}
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void IoChecker::Enter(const parser::IoControlSpec &spec) {
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// IoControlSpec context Name
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flags_.set(Flag::IoControlList);
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if (std::holds_alternative<parser::Name>(spec.u)) {
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SetSpecifier(IoSpecKind::Nml);
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flags_.set(Flag::FmtOrNml);
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}
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}
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void IoChecker::Enter(const parser::IoControlSpec::Asynchronous &spec) {
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SetSpecifier(IoSpecKind::Asynchronous);
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if (const std::optional<std::string> charConst{
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GetConstExpr<std::string>(spec)}) {
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flags_.set(
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Flag::AsynchronousYes, parser::ToUpperCaseLetters(*charConst) == "YES");
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CheckStringValue(IoSpecKind::Asynchronous, *charConst,
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parser::FindSourceLocation(spec)); // C1223
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}
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}
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void IoChecker::Enter(const parser::IoControlSpec::CharExpr &spec) {
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IoSpecKind specKind{};
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using ParseKind = parser::IoControlSpec::CharExpr::Kind;
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switch (std::get<ParseKind>(spec.t)) {
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case ParseKind::Advance:
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specKind = IoSpecKind::Advance;
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break;
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case ParseKind::Blank:
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specKind = IoSpecKind::Blank;
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break;
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case ParseKind::Decimal:
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specKind = IoSpecKind::Decimal;
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break;
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case ParseKind::Delim:
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specKind = IoSpecKind::Delim;
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break;
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case ParseKind::Pad:
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specKind = IoSpecKind::Pad;
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break;
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case ParseKind::Round:
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specKind = IoSpecKind::Round;
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break;
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case ParseKind::Sign:
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specKind = IoSpecKind::Sign;
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break;
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}
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SetSpecifier(specKind);
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if (const std::optional<std::string> charConst{GetConstExpr<std::string>(
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std::get<parser::ScalarDefaultCharExpr>(spec.t))}) {
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if (specKind == IoSpecKind::Advance) {
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flags_.set(
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Flag::AdvanceYes, parser::ToUpperCaseLetters(*charConst) == "YES");
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}
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CheckStringValue(specKind, *charConst, parser::FindSourceLocation(spec));
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}
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}
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void IoChecker::Enter(const parser::IoControlSpec::Pos &) {
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SetSpecifier(IoSpecKind::Pos);
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}
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void IoChecker::Enter(const parser::IoControlSpec::Rec &) {
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SetSpecifier(IoSpecKind::Rec);
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}
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void IoChecker::Enter(const parser::IoControlSpec::Size &var) {
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CheckForDefinableVariable(var, "SIZE");
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SetSpecifier(IoSpecKind::Size);
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}
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void IoChecker::Enter(const parser::IoUnit &spec) {
|
|
if (const parser::Variable * var{std::get_if<parser::Variable>(&spec.u)}) {
|
|
if (stmt_ == IoStmtKind::Write) {
|
|
CheckForDefinableVariable(*var, "Internal file");
|
|
}
|
|
if (const auto *expr{GetExpr(*var)}) {
|
|
if (HasVectorSubscript(*expr)) {
|
|
context_.Say(parser::FindSourceLocation(*var), // C1201
|
|
"Internal file must not have a vector subscript"_err_en_US);
|
|
} else if (!ExprTypeKindIsDefault(*expr, context_)) {
|
|
// This may be too restrictive; other kinds may be valid.
|
|
context_.Say(parser::FindSourceLocation(*var), // C1202
|
|
"Invalid character kind for an internal file variable"_err_en_US);
|
|
}
|
|
}
|
|
SetSpecifier(IoSpecKind::Unit);
|
|
flags_.set(Flag::InternalUnit);
|
|
} else if (std::get_if<parser::Star>(&spec.u)) {
|
|
SetSpecifier(IoSpecKind::Unit);
|
|
flags_.set(Flag::StarUnit);
|
|
}
|
|
}
|
|
|
|
void IoChecker::Enter(const parser::MsgVariable &var) {
|
|
if (stmt_ == IoStmtKind::None) {
|
|
// allocate, deallocate, image control
|
|
CheckForDefinableVariable(var, "ERRMSG");
|
|
return;
|
|
}
|
|
CheckForDefinableVariable(var, "IOMSG");
|
|
SetSpecifier(IoSpecKind::Iomsg);
|
|
}
|
|
|
|
void IoChecker::Enter(const parser::OutputItem &item) {
|
|
flags_.set(Flag::DataList);
|
|
if (const auto *x{std::get_if<parser::Expr>(&item.u)}) {
|
|
if (const auto *expr{GetExpr(*x)}) {
|
|
const Symbol *last{GetLastSymbol(*expr)};
|
|
if (last && IsProcedurePointer(*last)) {
|
|
context_.Say(parser::FindSourceLocation(*x),
|
|
"Output item must not be a procedure pointer"_err_en_US); // C1233
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
void IoChecker::Enter(const parser::StatusExpr &spec) {
|
|
SetSpecifier(IoSpecKind::Status);
|
|
if (const std::optional<std::string> charConst{
|
|
GetConstExpr<std::string>(spec)}) {
|
|
// Status values for Open and Close are different.
|
|
std::string s{parser::ToUpperCaseLetters(*charConst)};
|
|
if (stmt_ == IoStmtKind::Open) {
|
|
flags_.set(Flag::KnownStatus);
|
|
flags_.set(Flag::StatusNew, s == "NEW");
|
|
flags_.set(Flag::StatusReplace, s == "REPLACE");
|
|
flags_.set(Flag::StatusScratch, s == "SCRATCH");
|
|
// CheckStringValue compares for OPEN Status string values.
|
|
CheckStringValue(
|
|
IoSpecKind::Status, *charConst, parser::FindSourceLocation(spec));
|
|
return;
|
|
}
|
|
CHECK(stmt_ == IoStmtKind::Close);
|
|
if (s != "DELETE" && s != "KEEP") {
|
|
context_.Say(parser::FindSourceLocation(spec),
|
|
"Invalid STATUS value '%s'"_err_en_US, *charConst);
|
|
}
|
|
}
|
|
}
|
|
|
|
void IoChecker::Enter(const parser::StatVariable &var) {
|
|
if (stmt_ == IoStmtKind::None) {
|
|
// allocate, deallocate, image control
|
|
CheckForDefinableVariable(var, "STAT");
|
|
return;
|
|
}
|
|
CheckForDefinableVariable(var, "IOSTAT");
|
|
SetSpecifier(IoSpecKind::Iostat);
|
|
}
|
|
|
|
void IoChecker::Leave(const parser::BackspaceStmt &) {
|
|
CheckForPureSubprogram();
|
|
CheckForRequiredSpecifier(
|
|
flags_.test(Flag::NumberUnit), "UNIT number"); // C1240
|
|
Done();
|
|
}
|
|
|
|
void IoChecker::Leave(const parser::CloseStmt &) {
|
|
CheckForPureSubprogram();
|
|
CheckForRequiredSpecifier(
|
|
flags_.test(Flag::NumberUnit), "UNIT number"); // C1208
|
|
Done();
|
|
}
|
|
|
|
void IoChecker::Leave(const parser::EndfileStmt &) {
|
|
CheckForPureSubprogram();
|
|
CheckForRequiredSpecifier(
|
|
flags_.test(Flag::NumberUnit), "UNIT number"); // C1240
|
|
Done();
|
|
}
|
|
|
|
void IoChecker::Leave(const parser::FlushStmt &) {
|
|
CheckForPureSubprogram();
|
|
CheckForRequiredSpecifier(
|
|
flags_.test(Flag::NumberUnit), "UNIT number"); // C1243
|
|
Done();
|
|
}
|
|
|
|
void IoChecker::Leave(const parser::InquireStmt &stmt) {
|
|
if (std::get_if<std::list<parser::InquireSpec>>(&stmt.u)) {
|
|
CheckForPureSubprogram();
|
|
// Inquire by unit or by file (vs. by output list).
|
|
CheckForRequiredSpecifier(
|
|
flags_.test(Flag::NumberUnit) || specifierSet_.test(IoSpecKind::File),
|
|
"UNIT number or FILE"); // C1246
|
|
CheckForProhibitedSpecifier(IoSpecKind::File, IoSpecKind::Unit); // C1246
|
|
CheckForRequiredSpecifier(IoSpecKind::Id, IoSpecKind::Pending); // C1248
|
|
}
|
|
Done();
|
|
}
|
|
|
|
void IoChecker::Leave(const parser::OpenStmt &) {
|
|
CheckForPureSubprogram();
|
|
CheckForRequiredSpecifier(specifierSet_.test(IoSpecKind::Unit) ||
|
|
specifierSet_.test(IoSpecKind::Newunit),
|
|
"UNIT or NEWUNIT"); // C1204, C1205
|
|
CheckForProhibitedSpecifier(
|
|
IoSpecKind::Newunit, IoSpecKind::Unit); // C1204, C1205
|
|
CheckForRequiredSpecifier(flags_.test(Flag::StatusNew), "STATUS='NEW'",
|
|
IoSpecKind::File); // 12.5.6.10
|
|
CheckForRequiredSpecifier(flags_.test(Flag::StatusReplace),
|
|
"STATUS='REPLACE'", IoSpecKind::File); // 12.5.6.10
|
|
CheckForProhibitedSpecifier(flags_.test(Flag::StatusScratch),
|
|
"STATUS='SCRATCH'", IoSpecKind::File); // 12.5.6.10
|
|
if (flags_.test(Flag::KnownStatus)) {
|
|
CheckForRequiredSpecifier(IoSpecKind::Newunit,
|
|
specifierSet_.test(IoSpecKind::File) ||
|
|
flags_.test(Flag::StatusScratch),
|
|
"FILE or STATUS='SCRATCH'"); // 12.5.6.12
|
|
} else {
|
|
CheckForRequiredSpecifier(IoSpecKind::Newunit,
|
|
specifierSet_.test(IoSpecKind::File) ||
|
|
specifierSet_.test(IoSpecKind::Status),
|
|
"FILE or STATUS"); // 12.5.6.12
|
|
}
|
|
if (flags_.test(Flag::KnownAccess)) {
|
|
CheckForRequiredSpecifier(flags_.test(Flag::AccessDirect),
|
|
"ACCESS='DIRECT'", IoSpecKind::Recl); // 12.5.6.15
|
|
CheckForProhibitedSpecifier(flags_.test(Flag::AccessStream),
|
|
"STATUS='STREAM'", IoSpecKind::Recl); // 12.5.6.15
|
|
}
|
|
Done();
|
|
}
|
|
|
|
void IoChecker::Leave(const parser::PrintStmt &) {
|
|
CheckForPureSubprogram();
|
|
Done();
|
|
}
|
|
|
|
static void CheckForDoVariableInNamelist(const Symbol &namelist,
|
|
SemanticsContext &context, parser::CharBlock namelistLocation) {
|
|
const auto &details{namelist.GetUltimate().get<NamelistDetails>()};
|
|
for (const Symbol &object : details.objects()) {
|
|
context.CheckIndexVarRedefine(namelistLocation, object);
|
|
}
|
|
}
|
|
|
|
static void CheckForDoVariableInNamelistSpec(
|
|
const parser::ReadStmt &readStmt, SemanticsContext &context) {
|
|
const std::list<parser::IoControlSpec> &controls{readStmt.controls};
|
|
for (const auto &control : controls) {
|
|
if (const auto *namelist{std::get_if<parser::Name>(&control.u)}) {
|
|
if (const Symbol * symbol{namelist->symbol}) {
|
|
CheckForDoVariableInNamelist(*symbol, context, namelist->source);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
static void CheckForDoVariable(
|
|
const parser::ReadStmt &readStmt, SemanticsContext &context) {
|
|
CheckForDoVariableInNamelistSpec(readStmt, context);
|
|
const std::list<parser::InputItem> &items{readStmt.items};
|
|
for (const auto &item : items) {
|
|
if (const parser::Variable *
|
|
variable{std::get_if<parser::Variable>(&item.u)}) {
|
|
context.CheckIndexVarRedefine(*variable);
|
|
}
|
|
}
|
|
}
|
|
|
|
void IoChecker::Leave(const parser::ReadStmt &readStmt) {
|
|
if (!flags_.test(Flag::InternalUnit)) {
|
|
CheckForPureSubprogram();
|
|
}
|
|
CheckForDoVariable(readStmt, context_);
|
|
if (!flags_.test(Flag::IoControlList)) {
|
|
Done();
|
|
return;
|
|
}
|
|
LeaveReadWrite();
|
|
CheckForProhibitedSpecifier(IoSpecKind::Delim); // C1212
|
|
CheckForProhibitedSpecifier(IoSpecKind::Sign); // C1212
|
|
CheckForProhibitedSpecifier(IoSpecKind::Rec, IoSpecKind::End); // C1220
|
|
CheckForRequiredSpecifier(IoSpecKind::Eor,
|
|
specifierSet_.test(IoSpecKind::Advance) && !flags_.test(Flag::AdvanceYes),
|
|
"ADVANCE with value 'NO'"); // C1222 + 12.6.2.1p2
|
|
CheckForRequiredSpecifier(IoSpecKind::Blank, flags_.test(Flag::FmtOrNml),
|
|
"FMT or NML"); // C1227
|
|
CheckForRequiredSpecifier(
|
|
IoSpecKind::Pad, flags_.test(Flag::FmtOrNml), "FMT or NML"); // C1227
|
|
Done();
|
|
}
|
|
|
|
void IoChecker::Leave(const parser::RewindStmt &) {
|
|
CheckForRequiredSpecifier(
|
|
flags_.test(Flag::NumberUnit), "UNIT number"); // C1240
|
|
CheckForPureSubprogram();
|
|
Done();
|
|
}
|
|
|
|
void IoChecker::Leave(const parser::WaitStmt &) {
|
|
CheckForRequiredSpecifier(
|
|
flags_.test(Flag::NumberUnit), "UNIT number"); // C1237
|
|
CheckForPureSubprogram();
|
|
Done();
|
|
}
|
|
|
|
void IoChecker::Leave(const parser::WriteStmt &) {
|
|
if (!flags_.test(Flag::InternalUnit)) {
|
|
CheckForPureSubprogram();
|
|
}
|
|
LeaveReadWrite();
|
|
CheckForProhibitedSpecifier(IoSpecKind::Blank); // C1213
|
|
CheckForProhibitedSpecifier(IoSpecKind::End); // C1213
|
|
CheckForProhibitedSpecifier(IoSpecKind::Eor); // C1213
|
|
CheckForProhibitedSpecifier(IoSpecKind::Pad); // C1213
|
|
CheckForProhibitedSpecifier(IoSpecKind::Size); // C1213
|
|
CheckForRequiredSpecifier(
|
|
IoSpecKind::Sign, flags_.test(Flag::FmtOrNml), "FMT or NML"); // C1227
|
|
CheckForRequiredSpecifier(IoSpecKind::Delim,
|
|
flags_.test(Flag::StarFmt) || specifierSet_.test(IoSpecKind::Nml),
|
|
"FMT=* or NML"); // C1228
|
|
Done();
|
|
}
|
|
|
|
void IoChecker::LeaveReadWrite() const {
|
|
CheckForRequiredSpecifier(IoSpecKind::Unit); // C1211
|
|
CheckForProhibitedSpecifier(IoSpecKind::Nml, IoSpecKind::Rec); // C1216
|
|
CheckForProhibitedSpecifier(IoSpecKind::Nml, IoSpecKind::Fmt); // C1216
|
|
CheckForProhibitedSpecifier(
|
|
IoSpecKind::Nml, flags_.test(Flag::DataList), "a data list"); // C1216
|
|
CheckForProhibitedSpecifier(flags_.test(Flag::InternalUnit),
|
|
"UNIT=internal-file", IoSpecKind::Pos); // C1219
|
|
CheckForProhibitedSpecifier(flags_.test(Flag::InternalUnit),
|
|
"UNIT=internal-file", IoSpecKind::Rec); // C1219
|
|
CheckForProhibitedSpecifier(
|
|
flags_.test(Flag::StarUnit), "UNIT=*", IoSpecKind::Pos); // C1219
|
|
CheckForProhibitedSpecifier(
|
|
flags_.test(Flag::StarUnit), "UNIT=*", IoSpecKind::Rec); // C1219
|
|
CheckForProhibitedSpecifier(
|
|
IoSpecKind::Rec, flags_.test(Flag::StarFmt), "FMT=*"); // C1220
|
|
CheckForRequiredSpecifier(IoSpecKind::Advance,
|
|
flags_.test(Flag::CharFmt) || flags_.test(Flag::LabelFmt) ||
|
|
flags_.test(Flag::AssignFmt),
|
|
"an explicit format"); // C1221
|
|
CheckForProhibitedSpecifier(IoSpecKind::Advance,
|
|
flags_.test(Flag::InternalUnit), "UNIT=internal-file"); // C1221
|
|
CheckForRequiredSpecifier(flags_.test(Flag::AsynchronousYes),
|
|
"ASYNCHRONOUS='YES'", flags_.test(Flag::NumberUnit),
|
|
"UNIT=number"); // C1224
|
|
CheckForRequiredSpecifier(IoSpecKind::Id, flags_.test(Flag::AsynchronousYes),
|
|
"ASYNCHRONOUS='YES'"); // C1225
|
|
CheckForProhibitedSpecifier(IoSpecKind::Pos, IoSpecKind::Rec); // C1226
|
|
CheckForRequiredSpecifier(IoSpecKind::Decimal, flags_.test(Flag::FmtOrNml),
|
|
"FMT or NML"); // C1227
|
|
CheckForRequiredSpecifier(IoSpecKind::Round, flags_.test(Flag::FmtOrNml),
|
|
"FMT or NML"); // C1227
|
|
}
|
|
|
|
void IoChecker::SetSpecifier(IoSpecKind specKind) {
|
|
if (stmt_ == IoStmtKind::None) {
|
|
// FMT may appear on PRINT statements, which don't have any checks.
|
|
// [IO]MSG and [IO]STAT parse symbols are shared with non-I/O statements.
|
|
return;
|
|
}
|
|
// C1203, C1207, C1210, C1236, C1239, C1242, C1245
|
|
if (specifierSet_.test(specKind)) {
|
|
context_.Say("Duplicate %s specifier"_err_en_US,
|
|
parser::ToUpperCaseLetters(common::EnumToString(specKind)));
|
|
}
|
|
specifierSet_.set(specKind);
|
|
}
|
|
|
|
void IoChecker::CheckStringValue(IoSpecKind specKind, const std::string &value,
|
|
const parser::CharBlock &source) const {
|
|
static std::unordered_map<IoSpecKind, const std::set<std::string>> specValues{
|
|
{IoSpecKind::Access, {"DIRECT", "SEQUENTIAL", "STREAM"}},
|
|
{IoSpecKind::Action, {"READ", "READWRITE", "WRITE"}},
|
|
{IoSpecKind::Advance, {"NO", "YES"}},
|
|
{IoSpecKind::Asynchronous, {"NO", "YES"}},
|
|
{IoSpecKind::Blank, {"NULL", "ZERO"}},
|
|
{IoSpecKind::Decimal, {"COMMA", "POINT"}},
|
|
{IoSpecKind::Delim, {"APOSTROPHE", "NONE", "QUOTE"}},
|
|
{IoSpecKind::Encoding, {"DEFAULT", "UTF-8"}},
|
|
{IoSpecKind::Form, {"FORMATTED", "UNFORMATTED"}},
|
|
{IoSpecKind::Pad, {"NO", "YES"}},
|
|
{IoSpecKind::Position, {"APPEND", "ASIS", "REWIND"}},
|
|
{IoSpecKind::Round,
|
|
{"COMPATIBLE", "DOWN", "NEAREST", "PROCESSOR_DEFINED", "UP", "ZERO"}},
|
|
{IoSpecKind::Sign, {"PLUS", "PROCESSOR_DEFINED", "SUPPRESS"}},
|
|
{IoSpecKind::Status,
|
|
// Open values; Close values are {"DELETE", "KEEP"}.
|
|
{"NEW", "OLD", "REPLACE", "SCRATCH", "UNKNOWN"}},
|
|
{IoSpecKind::Carriagecontrol, {"LIST", "FORTRAN", "NONE"}},
|
|
{IoSpecKind::Convert, {"BIG_ENDIAN", "LITTLE_ENDIAN", "NATIVE"}},
|
|
{IoSpecKind::Dispose, {"DELETE", "KEEP"}},
|
|
};
|
|
if (!specValues.at(specKind).count(parser::ToUpperCaseLetters(value))) {
|
|
context_.Say(source, "Invalid %s value '%s'"_err_en_US,
|
|
parser::ToUpperCaseLetters(common::EnumToString(specKind)), value);
|
|
}
|
|
}
|
|
|
|
// CheckForRequiredSpecifier and CheckForProhibitedSpecifier functions
|
|
// need conditions to check, and string arguments to insert into a message.
|
|
// An IoSpecKind provides both an absence/presence condition and a string
|
|
// argument (its name). A (condition, string) pair provides an arbitrary
|
|
// condition and an arbitrary string.
|
|
|
|
void IoChecker::CheckForRequiredSpecifier(IoSpecKind specKind) const {
|
|
if (!specifierSet_.test(specKind)) {
|
|
context_.Say("%s statement must have a %s specifier"_err_en_US,
|
|
parser::ToUpperCaseLetters(common::EnumToString(stmt_)),
|
|
parser::ToUpperCaseLetters(common::EnumToString(specKind)));
|
|
}
|
|
}
|
|
|
|
void IoChecker::CheckForRequiredSpecifier(
|
|
bool condition, const std::string &s) const {
|
|
if (!condition) {
|
|
context_.Say("%s statement must have a %s specifier"_err_en_US,
|
|
parser::ToUpperCaseLetters(common::EnumToString(stmt_)), s);
|
|
}
|
|
}
|
|
|
|
void IoChecker::CheckForRequiredSpecifier(
|
|
IoSpecKind specKind1, IoSpecKind specKind2) const {
|
|
if (specifierSet_.test(specKind1) && !specifierSet_.test(specKind2)) {
|
|
context_.Say("If %s appears, %s must also appear"_err_en_US,
|
|
parser::ToUpperCaseLetters(common::EnumToString(specKind1)),
|
|
parser::ToUpperCaseLetters(common::EnumToString(specKind2)));
|
|
}
|
|
}
|
|
|
|
void IoChecker::CheckForRequiredSpecifier(
|
|
IoSpecKind specKind, bool condition, const std::string &s) const {
|
|
if (specifierSet_.test(specKind) && !condition) {
|
|
context_.Say("If %s appears, %s must also appear"_err_en_US,
|
|
parser::ToUpperCaseLetters(common::EnumToString(specKind)), s);
|
|
}
|
|
}
|
|
|
|
void IoChecker::CheckForRequiredSpecifier(
|
|
bool condition, const std::string &s, IoSpecKind specKind) const {
|
|
if (condition && !specifierSet_.test(specKind)) {
|
|
context_.Say("If %s appears, %s must also appear"_err_en_US, s,
|
|
parser::ToUpperCaseLetters(common::EnumToString(specKind)));
|
|
}
|
|
}
|
|
|
|
void IoChecker::CheckForRequiredSpecifier(bool condition1,
|
|
const std::string &s1, bool condition2, const std::string &s2) const {
|
|
if (condition1 && !condition2) {
|
|
context_.Say("If %s appears, %s must also appear"_err_en_US, s1, s2);
|
|
}
|
|
}
|
|
|
|
void IoChecker::CheckForProhibitedSpecifier(IoSpecKind specKind) const {
|
|
if (specifierSet_.test(specKind)) {
|
|
context_.Say("%s statement must not have a %s specifier"_err_en_US,
|
|
parser::ToUpperCaseLetters(common::EnumToString(stmt_)),
|
|
parser::ToUpperCaseLetters(common::EnumToString(specKind)));
|
|
}
|
|
}
|
|
|
|
void IoChecker::CheckForProhibitedSpecifier(
|
|
IoSpecKind specKind1, IoSpecKind specKind2) const {
|
|
if (specifierSet_.test(specKind1) && specifierSet_.test(specKind2)) {
|
|
context_.Say("If %s appears, %s must not appear"_err_en_US,
|
|
parser::ToUpperCaseLetters(common::EnumToString(specKind1)),
|
|
parser::ToUpperCaseLetters(common::EnumToString(specKind2)));
|
|
}
|
|
}
|
|
|
|
void IoChecker::CheckForProhibitedSpecifier(
|
|
IoSpecKind specKind, bool condition, const std::string &s) const {
|
|
if (specifierSet_.test(specKind) && condition) {
|
|
context_.Say("If %s appears, %s must not appear"_err_en_US,
|
|
parser::ToUpperCaseLetters(common::EnumToString(specKind)), s);
|
|
}
|
|
}
|
|
|
|
void IoChecker::CheckForProhibitedSpecifier(
|
|
bool condition, const std::string &s, IoSpecKind specKind) const {
|
|
if (condition && specifierSet_.test(specKind)) {
|
|
context_.Say("If %s appears, %s must not appear"_err_en_US, s,
|
|
parser::ToUpperCaseLetters(common::EnumToString(specKind)));
|
|
}
|
|
}
|
|
|
|
template <typename A>
|
|
void IoChecker::CheckForDefinableVariable(
|
|
const A &variable, const std::string &s) const {
|
|
if (const auto *var{parser::Unwrap<parser::Variable>(variable)}) {
|
|
if (auto expr{AnalyzeExpr(context_, *var)}) {
|
|
auto at{var->GetSource()};
|
|
if (auto whyNot{WhyNotModifiable(at, *expr, context_.FindScope(at),
|
|
true /*vectorSubscriptIsOk*/)}) {
|
|
const Symbol *base{GetFirstSymbol(*expr)};
|
|
context_
|
|
.Say(at, "%s variable '%s' must be definable"_err_en_US, s,
|
|
(base ? base->name() : at).ToString())
|
|
.Attach(std::move(*whyNot));
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
void IoChecker::CheckForPureSubprogram() const { // C1597
|
|
CHECK(context_.location());
|
|
if (FindPureProcedureContaining(context_.FindScope(*context_.location()))) {
|
|
context_.Say("External I/O is not allowed in a pure subprogram"_err_en_US);
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}
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}
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} // namespace Fortran::semantics
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