forked from OSchip/llvm-project
443 lines
13 KiB
C++
443 lines
13 KiB
C++
//===-- DeclarationName.cpp - Declaration names implementation --*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file implements the DeclarationName and DeclarationNameTable
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// classes.
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//
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//===----------------------------------------------------------------------===//
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#include "clang/AST/DeclarationName.h"
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#include "clang/AST/Type.h"
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#include "clang/AST/TypeOrdering.h"
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#include "clang/AST/Decl.h"
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#include "clang/Basic/IdentifierTable.h"
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#include "llvm/ADT/DenseMap.h"
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#include "llvm/ADT/FoldingSet.h"
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#include <cstdio>
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using namespace clang;
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namespace clang {
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/// CXXSpecialName - Records the type associated with one of the
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/// "special" kinds of declaration names in C++, e.g., constructors,
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/// destructors, and conversion functions.
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class CXXSpecialName
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: public DeclarationNameExtra, public llvm::FoldingSetNode {
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public:
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/// Type - The type associated with this declaration name.
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QualType Type;
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/// FETokenInfo - Extra information associated with this declaration
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/// name that can be used by the front end.
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void *FETokenInfo;
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void Profile(llvm::FoldingSetNodeID &ID) {
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ID.AddInteger(ExtraKindOrNumArgs);
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ID.AddPointer(Type.getAsOpaquePtr());
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}
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};
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/// CXXOperatorIdName - Contains extra information for the name of an
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/// overloaded operator in C++, such as "operator+.
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class CXXOperatorIdName : public DeclarationNameExtra {
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public:
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/// FETokenInfo - Extra information associated with this operator
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/// name that can be used by the front end.
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void *FETokenInfo;
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};
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/// CXXLiberalOperatorName - Contains the actual identifier that makes up the
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/// name.
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///
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/// This identifier is stored here rather than directly in DeclarationName so as
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/// to allow Objective-C selectors, which are about a million times more common,
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/// to consume minimal memory.
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class CXXLiteralOperatorIdName : public DeclarationNameExtra {
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public:
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IdentifierInfo *ID;
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};
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bool operator<(DeclarationName LHS, DeclarationName RHS) {
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if (LHS.getNameKind() != RHS.getNameKind())
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return LHS.getNameKind() < RHS.getNameKind();
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switch (LHS.getNameKind()) {
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case DeclarationName::Identifier:
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return LHS.getAsIdentifierInfo()->getName() <
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RHS.getAsIdentifierInfo()->getName();
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case DeclarationName::ObjCZeroArgSelector:
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case DeclarationName::ObjCOneArgSelector:
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case DeclarationName::ObjCMultiArgSelector: {
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Selector LHSSelector = LHS.getObjCSelector();
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Selector RHSSelector = RHS.getObjCSelector();
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for (unsigned I = 0,
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N = std::min(LHSSelector.getNumArgs(), RHSSelector.getNumArgs());
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I != N; ++I) {
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IdentifierInfo *LHSId = LHSSelector.getIdentifierInfoForSlot(I);
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IdentifierInfo *RHSId = RHSSelector.getIdentifierInfoForSlot(I);
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if (!LHSId || !RHSId)
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return LHSId && !RHSId;
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switch (LHSId->getName().compare(RHSId->getName())) {
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case -1: return true;
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case 1: return false;
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default: break;
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}
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}
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return LHSSelector.getNumArgs() < RHSSelector.getNumArgs();
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}
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case DeclarationName::CXXConstructorName:
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case DeclarationName::CXXDestructorName:
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case DeclarationName::CXXConversionFunctionName:
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return QualTypeOrdering()(LHS.getCXXNameType(), RHS.getCXXNameType());
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case DeclarationName::CXXOperatorName:
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return LHS.getCXXOverloadedOperator() < RHS.getCXXOverloadedOperator();
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case DeclarationName::CXXLiteralOperatorName:
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return LHS.getCXXLiteralIdentifier()->getName() <
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RHS.getCXXLiteralIdentifier()->getName();
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case DeclarationName::CXXUsingDirective:
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return false;
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}
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return false;
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}
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} // end namespace clang
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DeclarationName::DeclarationName(Selector Sel) {
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if (!Sel.getAsOpaquePtr()) {
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Ptr = 0;
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return;
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}
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switch (Sel.getNumArgs()) {
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case 0:
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Ptr = reinterpret_cast<uintptr_t>(Sel.getAsIdentifierInfo());
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assert((Ptr & PtrMask) == 0 && "Improperly aligned IdentifierInfo");
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Ptr |= StoredObjCZeroArgSelector;
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break;
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case 1:
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Ptr = reinterpret_cast<uintptr_t>(Sel.getAsIdentifierInfo());
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assert((Ptr & PtrMask) == 0 && "Improperly aligned IdentifierInfo");
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Ptr |= StoredObjCOneArgSelector;
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break;
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default:
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Ptr = Sel.InfoPtr & ~Selector::ArgFlags;
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assert((Ptr & PtrMask) == 0 && "Improperly aligned MultiKeywordSelector");
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Ptr |= StoredDeclarationNameExtra;
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break;
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}
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}
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DeclarationName::NameKind DeclarationName::getNameKind() const {
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switch (getStoredNameKind()) {
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case StoredIdentifier: return Identifier;
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case StoredObjCZeroArgSelector: return ObjCZeroArgSelector;
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case StoredObjCOneArgSelector: return ObjCOneArgSelector;
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case StoredDeclarationNameExtra:
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switch (getExtra()->ExtraKindOrNumArgs) {
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case DeclarationNameExtra::CXXConstructor:
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return CXXConstructorName;
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case DeclarationNameExtra::CXXDestructor:
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return CXXDestructorName;
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case DeclarationNameExtra::CXXConversionFunction:
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return CXXConversionFunctionName;
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case DeclarationNameExtra::CXXLiteralOperator:
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return CXXLiteralOperatorName;
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case DeclarationNameExtra::CXXUsingDirective:
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return CXXUsingDirective;
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default:
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// Check if we have one of the CXXOperator* enumeration values.
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if (getExtra()->ExtraKindOrNumArgs <
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DeclarationNameExtra::CXXUsingDirective)
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return CXXOperatorName;
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return ObjCMultiArgSelector;
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}
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break;
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}
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// Can't actually get here.
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assert(0 && "This should be unreachable!");
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return Identifier;
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}
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std::string DeclarationName::getAsString() const {
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switch (getNameKind()) {
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case Identifier:
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if (const IdentifierInfo *II = getAsIdentifierInfo())
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return II->getName();
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return "";
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case ObjCZeroArgSelector:
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case ObjCOneArgSelector:
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case ObjCMultiArgSelector:
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return getObjCSelector().getAsString();
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case CXXConstructorName: {
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QualType ClassType = getCXXNameType();
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if (const RecordType *ClassRec = ClassType->getAs<RecordType>())
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return ClassRec->getDecl()->getNameAsString();
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return ClassType.getAsString();
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}
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case CXXDestructorName: {
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std::string Result = "~";
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QualType Type = getCXXNameType();
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if (const RecordType *Rec = Type->getAs<RecordType>())
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Result += Rec->getDecl()->getNameAsString();
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else
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Result += Type.getAsString();
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return Result;
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}
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case CXXOperatorName: {
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static const char *OperatorNames[NUM_OVERLOADED_OPERATORS] = {
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0,
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#define OVERLOADED_OPERATOR(Name,Spelling,Token,Unary,Binary,MemberOnly) \
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Spelling,
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#include "clang/Basic/OperatorKinds.def"
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};
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const char *OpName = OperatorNames[getCXXOverloadedOperator()];
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assert(OpName && "not an overloaded operator");
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std::string Result = "operator";
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if (OpName[0] >= 'a' && OpName[0] <= 'z')
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Result += ' ';
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Result += OpName;
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return Result;
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}
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case CXXLiteralOperatorName: {
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return "operator \"\" " + std::string(getCXXLiteralIdentifier()->getName());
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}
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case CXXConversionFunctionName: {
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std::string Result = "operator ";
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QualType Type = getCXXNameType();
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if (const RecordType *Rec = Type->getAs<RecordType>())
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Result += Rec->getDecl()->getNameAsString();
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else
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Result += Type.getAsString();
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return Result;
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}
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case CXXUsingDirective:
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return "<using-directive>";
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}
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assert(false && "Unexpected declaration name kind");
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return "";
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}
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QualType DeclarationName::getCXXNameType() const {
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if (CXXSpecialName *CXXName = getAsCXXSpecialName())
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return CXXName->Type;
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else
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return QualType();
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}
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OverloadedOperatorKind DeclarationName::getCXXOverloadedOperator() const {
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if (CXXOperatorIdName *CXXOp = getAsCXXOperatorIdName()) {
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unsigned value
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= CXXOp->ExtraKindOrNumArgs - DeclarationNameExtra::CXXConversionFunction;
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return static_cast<OverloadedOperatorKind>(value);
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} else {
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return OO_None;
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}
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}
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IdentifierInfo *DeclarationName::getCXXLiteralIdentifier() const {
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if (CXXLiteralOperatorIdName *CXXLit = getAsCXXLiteralOperatorIdName())
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return CXXLit->ID;
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else
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return 0;
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}
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Selector DeclarationName::getObjCSelector() const {
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switch (getNameKind()) {
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case ObjCZeroArgSelector:
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return Selector(reinterpret_cast<IdentifierInfo *>(Ptr & ~PtrMask), 0);
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case ObjCOneArgSelector:
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return Selector(reinterpret_cast<IdentifierInfo *>(Ptr & ~PtrMask), 1);
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case ObjCMultiArgSelector:
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return Selector(reinterpret_cast<MultiKeywordSelector *>(Ptr & ~PtrMask));
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default:
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break;
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}
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return Selector();
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}
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void *DeclarationName::getFETokenInfoAsVoid() const {
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switch (getNameKind()) {
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case Identifier:
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return getAsIdentifierInfo()->getFETokenInfo<void>();
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case CXXConstructorName:
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case CXXDestructorName:
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case CXXConversionFunctionName:
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return getAsCXXSpecialName()->FETokenInfo;
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case CXXOperatorName:
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return getAsCXXOperatorIdName()->FETokenInfo;
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case CXXLiteralOperatorName:
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return getCXXLiteralIdentifier()->getFETokenInfo<void>();
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default:
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assert(false && "Declaration name has no FETokenInfo");
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}
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return 0;
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}
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void DeclarationName::setFETokenInfo(void *T) {
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switch (getNameKind()) {
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case Identifier:
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getAsIdentifierInfo()->setFETokenInfo(T);
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break;
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case CXXConstructorName:
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case CXXDestructorName:
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case CXXConversionFunctionName:
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getAsCXXSpecialName()->FETokenInfo = T;
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break;
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case CXXOperatorName:
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getAsCXXOperatorIdName()->FETokenInfo = T;
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break;
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case CXXLiteralOperatorName:
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getCXXLiteralIdentifier()->setFETokenInfo(T);
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break;
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default:
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assert(false && "Declaration name has no FETokenInfo");
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}
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}
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DeclarationName DeclarationName::getUsingDirectiveName() {
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// Single instance of DeclarationNameExtra for using-directive
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static DeclarationNameExtra UDirExtra =
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{ DeclarationNameExtra::CXXUsingDirective };
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uintptr_t Ptr = reinterpret_cast<uintptr_t>(&UDirExtra);
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Ptr |= StoredDeclarationNameExtra;
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return DeclarationName(Ptr);
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}
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void DeclarationName::dump() const {
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fprintf(stderr, "%s\n", getAsString().c_str());
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}
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DeclarationNameTable::DeclarationNameTable() {
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CXXSpecialNamesImpl = new llvm::FoldingSet<CXXSpecialName>;
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// Initialize the overloaded operator names.
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CXXOperatorNames = new CXXOperatorIdName[NUM_OVERLOADED_OPERATORS];
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for (unsigned Op = 0; Op < NUM_OVERLOADED_OPERATORS; ++Op) {
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CXXOperatorNames[Op].ExtraKindOrNumArgs
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= Op + DeclarationNameExtra::CXXConversionFunction;
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CXXOperatorNames[Op].FETokenInfo = 0;
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}
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}
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DeclarationNameTable::~DeclarationNameTable() {
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llvm::FoldingSet<CXXSpecialName> *set =
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static_cast<llvm::FoldingSet<CXXSpecialName>*>(CXXSpecialNamesImpl);
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llvm::FoldingSetIterator<CXXSpecialName> I = set->begin(), E = set->end();
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while (I != E) {
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CXXSpecialName *n = &*I++;
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delete n;
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}
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delete set;
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delete [] CXXOperatorNames;
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}
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DeclarationName
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DeclarationNameTable::getCXXSpecialName(DeclarationName::NameKind Kind,
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CanQualType Ty) {
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assert(Kind >= DeclarationName::CXXConstructorName &&
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Kind <= DeclarationName::CXXConversionFunctionName &&
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"Kind must be a C++ special name kind");
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llvm::FoldingSet<CXXSpecialName> *SpecialNames
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= static_cast<llvm::FoldingSet<CXXSpecialName>*>(CXXSpecialNamesImpl);
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DeclarationNameExtra::ExtraKind EKind;
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switch (Kind) {
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case DeclarationName::CXXConstructorName:
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EKind = DeclarationNameExtra::CXXConstructor;
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assert(!Ty.hasQualifiers() &&"Constructor type must be unqualified");
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break;
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case DeclarationName::CXXDestructorName:
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EKind = DeclarationNameExtra::CXXDestructor;
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assert(!Ty.hasQualifiers() && "Destructor type must be unqualified");
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break;
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case DeclarationName::CXXConversionFunctionName:
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EKind = DeclarationNameExtra::CXXConversionFunction;
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break;
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default:
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return DeclarationName();
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}
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// Unique selector, to guarantee there is one per name.
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llvm::FoldingSetNodeID ID;
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ID.AddInteger(EKind);
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ID.AddPointer(Ty.getAsOpaquePtr());
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void *InsertPos = 0;
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if (CXXSpecialName *Name = SpecialNames->FindNodeOrInsertPos(ID, InsertPos))
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return DeclarationName(Name);
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CXXSpecialName *SpecialName = new CXXSpecialName;
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SpecialName->ExtraKindOrNumArgs = EKind;
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SpecialName->Type = Ty;
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SpecialName->FETokenInfo = 0;
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SpecialNames->InsertNode(SpecialName, InsertPos);
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return DeclarationName(SpecialName);
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}
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DeclarationName
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DeclarationNameTable::getCXXOperatorName(OverloadedOperatorKind Op) {
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return DeclarationName(&CXXOperatorNames[(unsigned)Op]);
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}
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DeclarationName
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DeclarationNameTable::getCXXLiteralOperatorName(IdentifierInfo *II) {
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CXXLiteralOperatorIdName *LiteralName = new CXXLiteralOperatorIdName;
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LiteralName->ExtraKindOrNumArgs = DeclarationNameExtra::CXXLiteralOperator;
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LiteralName->ID = II;
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return DeclarationName(LiteralName);
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}
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unsigned
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llvm::DenseMapInfo<clang::DeclarationName>::
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getHashValue(clang::DeclarationName N) {
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return DenseMapInfo<void*>::getHashValue(N.getAsOpaquePtr());
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}
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