forked from OSchip/llvm-project
597 lines
24 KiB
C++
597 lines
24 KiB
C++
//===--- ExprCXX.cpp - (C++) Expression AST Node Implementation -----------===//
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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 subclesses of Expr class declared in ExprCXX.h
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//
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//===----------------------------------------------------------------------===//
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#include "clang/Basic/IdentifierTable.h"
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#include "clang/AST/DeclCXX.h"
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#include "clang/AST/DeclTemplate.h"
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#include "clang/AST/ExprCXX.h"
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using namespace clang;
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//===----------------------------------------------------------------------===//
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// Child Iterators for iterating over subexpressions/substatements
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//===----------------------------------------------------------------------===//
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// CXXTypeidExpr - has child iterators if the operand is an expression
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Stmt::child_iterator CXXTypeidExpr::child_begin() {
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return isTypeOperand() ? child_iterator() : &Operand.Ex;
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}
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Stmt::child_iterator CXXTypeidExpr::child_end() {
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return isTypeOperand() ? child_iterator() : &Operand.Ex+1;
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}
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// CXXBoolLiteralExpr
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Stmt::child_iterator CXXBoolLiteralExpr::child_begin() {
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return child_iterator();
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}
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Stmt::child_iterator CXXBoolLiteralExpr::child_end() {
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return child_iterator();
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}
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// CXXNullPtrLiteralExpr
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Stmt::child_iterator CXXNullPtrLiteralExpr::child_begin() {
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return child_iterator();
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}
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Stmt::child_iterator CXXNullPtrLiteralExpr::child_end() {
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return child_iterator();
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}
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// CXXThisExpr
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Stmt::child_iterator CXXThisExpr::child_begin() { return child_iterator(); }
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Stmt::child_iterator CXXThisExpr::child_end() { return child_iterator(); }
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// CXXThrowExpr
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Stmt::child_iterator CXXThrowExpr::child_begin() { return &Op; }
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Stmt::child_iterator CXXThrowExpr::child_end() {
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// If Op is 0, we are processing throw; which has no children.
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return Op ? &Op+1 : &Op;
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}
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// CXXDefaultArgExpr
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Stmt::child_iterator CXXDefaultArgExpr::child_begin() {
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return child_iterator();
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}
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Stmt::child_iterator CXXDefaultArgExpr::child_end() {
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return child_iterator();
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}
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// CXXZeroInitValueExpr
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Stmt::child_iterator CXXZeroInitValueExpr::child_begin() {
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return child_iterator();
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}
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Stmt::child_iterator CXXZeroInitValueExpr::child_end() {
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return child_iterator();
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}
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// CXXConditionDeclExpr
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Stmt::child_iterator CXXConditionDeclExpr::child_begin() {
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return getVarDecl();
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}
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Stmt::child_iterator CXXConditionDeclExpr::child_end() {
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return child_iterator();
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}
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// CXXNewExpr
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CXXNewExpr::CXXNewExpr(bool globalNew, FunctionDecl *operatorNew,
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Expr **placementArgs, unsigned numPlaceArgs,
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bool parenTypeId, Expr *arraySize,
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CXXConstructorDecl *constructor, bool initializer,
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Expr **constructorArgs, unsigned numConsArgs,
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FunctionDecl *operatorDelete, QualType ty,
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SourceLocation startLoc, SourceLocation endLoc)
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: Expr(CXXNewExprClass, ty, ty->isDependentType(), ty->isDependentType()),
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GlobalNew(globalNew), ParenTypeId(parenTypeId),
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Initializer(initializer), Array(arraySize), NumPlacementArgs(numPlaceArgs),
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NumConstructorArgs(numConsArgs), OperatorNew(operatorNew),
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OperatorDelete(operatorDelete), Constructor(constructor),
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StartLoc(startLoc), EndLoc(endLoc) {
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unsigned TotalSize = Array + NumPlacementArgs + NumConstructorArgs;
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SubExprs = new Stmt*[TotalSize];
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unsigned i = 0;
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if (Array)
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SubExprs[i++] = arraySize;
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for (unsigned j = 0; j < NumPlacementArgs; ++j)
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SubExprs[i++] = placementArgs[j];
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for (unsigned j = 0; j < NumConstructorArgs; ++j)
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SubExprs[i++] = constructorArgs[j];
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assert(i == TotalSize);
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}
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Stmt::child_iterator CXXNewExpr::child_begin() { return &SubExprs[0]; }
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Stmt::child_iterator CXXNewExpr::child_end() {
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return &SubExprs[0] + Array + getNumPlacementArgs() + getNumConstructorArgs();
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}
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// CXXDeleteExpr
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Stmt::child_iterator CXXDeleteExpr::child_begin() { return &Argument; }
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Stmt::child_iterator CXXDeleteExpr::child_end() { return &Argument+1; }
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// CXXPseudoDestructorExpr
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Stmt::child_iterator CXXPseudoDestructorExpr::child_begin() { return &Base; }
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Stmt::child_iterator CXXPseudoDestructorExpr::child_end() {
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return &Base + 1;
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}
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// UnresolvedFunctionNameExpr
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Stmt::child_iterator UnresolvedFunctionNameExpr::child_begin() {
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return child_iterator();
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}
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Stmt::child_iterator UnresolvedFunctionNameExpr::child_end() {
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return child_iterator();
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}
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// UnaryTypeTraitExpr
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Stmt::child_iterator UnaryTypeTraitExpr::child_begin() {
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return child_iterator();
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}
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Stmt::child_iterator UnaryTypeTraitExpr::child_end() {
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return child_iterator();
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}
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// UnresolvedDeclRefExpr
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StmtIterator UnresolvedDeclRefExpr::child_begin() {
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return child_iterator();
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}
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StmtIterator UnresolvedDeclRefExpr::child_end() {
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return child_iterator();
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}
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TemplateIdRefExpr::TemplateIdRefExpr(QualType T,
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NestedNameSpecifier *Qualifier,
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SourceRange QualifierRange,
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TemplateName Template,
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SourceLocation TemplateNameLoc,
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SourceLocation LAngleLoc,
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const TemplateArgument *TemplateArgs,
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unsigned NumTemplateArgs,
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SourceLocation RAngleLoc)
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: Expr(TemplateIdRefExprClass, T,
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(Template.isDependent() ||
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TemplateSpecializationType::anyDependentTemplateArguments(
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TemplateArgs, NumTemplateArgs)),
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(Template.isDependent() ||
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TemplateSpecializationType::anyDependentTemplateArguments(
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TemplateArgs, NumTemplateArgs))),
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Qualifier(Qualifier), QualifierRange(QualifierRange), Template(Template),
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TemplateNameLoc(TemplateNameLoc), LAngleLoc(LAngleLoc),
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RAngleLoc(RAngleLoc), NumTemplateArgs(NumTemplateArgs) {
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TemplateArgument *StoredTemplateArgs
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= reinterpret_cast<TemplateArgument *> (this+1);
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for (unsigned I = 0; I != NumTemplateArgs; ++I)
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new (StoredTemplateArgs + I) TemplateArgument(TemplateArgs[I]);
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}
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TemplateIdRefExpr *
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TemplateIdRefExpr::Create(ASTContext &Context, QualType T,
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NestedNameSpecifier *Qualifier,
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SourceRange QualifierRange,
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TemplateName Template, SourceLocation TemplateNameLoc,
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SourceLocation LAngleLoc,
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const TemplateArgument *TemplateArgs,
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unsigned NumTemplateArgs, SourceLocation RAngleLoc) {
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void *Mem = Context.Allocate(sizeof(TemplateIdRefExpr) +
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sizeof(TemplateArgument) * NumTemplateArgs);
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return new (Mem) TemplateIdRefExpr(T, Qualifier, QualifierRange, Template,
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TemplateNameLoc, LAngleLoc, TemplateArgs,
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NumTemplateArgs, RAngleLoc);
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}
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void TemplateIdRefExpr::DoDestroy(ASTContext &Context) {
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const TemplateArgument *TemplateArgs = getTemplateArgs();
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for (unsigned I = 0; I != NumTemplateArgs; ++I)
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if (Expr *E = TemplateArgs[I].getAsExpr())
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E->Destroy(Context);
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this->~TemplateIdRefExpr();
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Context.Deallocate(this);
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}
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Stmt::child_iterator TemplateIdRefExpr::child_begin() {
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// FIXME: Walk the expressions in the template arguments (?)
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return Stmt::child_iterator();
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}
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Stmt::child_iterator TemplateIdRefExpr::child_end() {
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// FIXME: Walk the expressions in the template arguments (?)
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return Stmt::child_iterator();
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}
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bool UnaryTypeTraitExpr::EvaluateTrait(ASTContext& C) const {
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switch(UTT) {
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default: assert(false && "Unknown type trait or not implemented");
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case UTT_IsPOD: return QueriedType->isPODType();
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case UTT_IsClass: // Fallthrough
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case UTT_IsUnion:
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if (const RecordType *Record = QueriedType->getAs<RecordType>()) {
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bool Union = Record->getDecl()->isUnion();
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return UTT == UTT_IsUnion ? Union : !Union;
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}
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return false;
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case UTT_IsEnum: return QueriedType->isEnumeralType();
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case UTT_IsPolymorphic:
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if (const RecordType *Record = QueriedType->getAs<RecordType>()) {
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// Type traits are only parsed in C++, so we've got CXXRecords.
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return cast<CXXRecordDecl>(Record->getDecl())->isPolymorphic();
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}
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return false;
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case UTT_IsAbstract:
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if (const RecordType *RT = QueriedType->getAs<RecordType>())
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return cast<CXXRecordDecl>(RT->getDecl())->isAbstract();
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return false;
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case UTT_IsEmpty:
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if (const RecordType *Record = QueriedType->getAs<RecordType>()) {
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return !Record->getDecl()->isUnion()
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&& cast<CXXRecordDecl>(Record->getDecl())->isEmpty();
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}
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return false;
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case UTT_HasTrivialConstructor:
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// http://gcc.gnu.org/onlinedocs/gcc/Type-Traits.html:
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// If __is_pod (type) is true then the trait is true, else if type is
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// a cv class or union type (or array thereof) with a trivial default
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// constructor ([class.ctor]) then the trait is true, else it is false.
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if (QueriedType->isPODType())
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return true;
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if (const RecordType *RT =
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C.getBaseElementType(QueriedType)->getAs<RecordType>())
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return cast<CXXRecordDecl>(RT->getDecl())->hasTrivialConstructor();
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return false;
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case UTT_HasTrivialCopy:
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// http://gcc.gnu.org/onlinedocs/gcc/Type-Traits.html:
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// If __is_pod (type) is true or type is a reference type then
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// the trait is true, else if type is a cv class or union type
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// with a trivial copy constructor ([class.copy]) then the trait
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// is true, else it is false.
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if (QueriedType->isPODType() || QueriedType->isReferenceType())
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return true;
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if (const RecordType *RT = QueriedType->getAs<RecordType>())
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return cast<CXXRecordDecl>(RT->getDecl())->hasTrivialCopyConstructor();
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return false;
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case UTT_HasTrivialAssign:
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// http://gcc.gnu.org/onlinedocs/gcc/Type-Traits.html:
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// If type is const qualified or is a reference type then the
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// trait is false. Otherwise if __is_pod (type) is true then the
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// trait is true, else if type is a cv class or union type with
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// a trivial copy assignment ([class.copy]) then the trait is
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// true, else it is false.
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// Note: the const and reference restrictions are interesting,
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// given that const and reference members don't prevent a class
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// from having a trivial copy assignment operator (but do cause
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// errors if the copy assignment operator is actually used, q.v.
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// [class.copy]p12).
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if (C.getBaseElementType(QueriedType).isConstQualified())
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return false;
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if (QueriedType->isPODType())
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return true;
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if (const RecordType *RT = QueriedType->getAs<RecordType>())
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return cast<CXXRecordDecl>(RT->getDecl())->hasTrivialCopyAssignment();
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return false;
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case UTT_HasTrivialDestructor:
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// http://gcc.gnu.org/onlinedocs/gcc/Type-Traits.html:
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// If __is_pod (type) is true or type is a reference type
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// then the trait is true, else if type is a cv class or union
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// type (or array thereof) with a trivial destructor
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// ([class.dtor]) then the trait is true, else it is
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// false.
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if (QueriedType->isPODType() || QueriedType->isReferenceType())
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return true;
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if (const RecordType *RT =
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C.getBaseElementType(QueriedType)->getAs<RecordType>())
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return cast<CXXRecordDecl>(RT->getDecl())->hasTrivialDestructor();
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return false;
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}
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}
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SourceRange CXXOperatorCallExpr::getSourceRange() const {
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OverloadedOperatorKind Kind = getOperator();
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if (Kind == OO_PlusPlus || Kind == OO_MinusMinus) {
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if (getNumArgs() == 1)
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// Prefix operator
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return SourceRange(getOperatorLoc(),
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getArg(0)->getSourceRange().getEnd());
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else
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// Postfix operator
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return SourceRange(getArg(0)->getSourceRange().getEnd(),
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getOperatorLoc());
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} else if (Kind == OO_Call) {
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return SourceRange(getArg(0)->getSourceRange().getBegin(), getRParenLoc());
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} else if (Kind == OO_Subscript) {
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return SourceRange(getArg(0)->getSourceRange().getBegin(), getRParenLoc());
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} else if (getNumArgs() == 1) {
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return SourceRange(getOperatorLoc(), getArg(0)->getSourceRange().getEnd());
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} else if (getNumArgs() == 2) {
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return SourceRange(getArg(0)->getSourceRange().getBegin(),
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getArg(1)->getSourceRange().getEnd());
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} else {
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return SourceRange();
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}
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}
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Expr *CXXMemberCallExpr::getImplicitObjectArgument() {
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if (MemberExpr *MemExpr = dyn_cast<MemberExpr>(getCallee()->IgnoreParens()))
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return MemExpr->getBase();
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// FIXME: Will eventually need to cope with member pointers.
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return 0;
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}
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//===----------------------------------------------------------------------===//
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// Named casts
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//===----------------------------------------------------------------------===//
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/// getCastName - Get the name of the C++ cast being used, e.g.,
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/// "static_cast", "dynamic_cast", "reinterpret_cast", or
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/// "const_cast". The returned pointer must not be freed.
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const char *CXXNamedCastExpr::getCastName() const {
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switch (getStmtClass()) {
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case CXXStaticCastExprClass: return "static_cast";
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case CXXDynamicCastExprClass: return "dynamic_cast";
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case CXXReinterpretCastExprClass: return "reinterpret_cast";
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case CXXConstCastExprClass: return "const_cast";
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default: return "<invalid cast>";
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}
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}
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CXXTemporary *CXXTemporary::Create(ASTContext &C,
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const CXXDestructorDecl *Destructor) {
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return new (C) CXXTemporary(Destructor);
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}
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void CXXTemporary::Destroy(ASTContext &Ctx) {
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this->~CXXTemporary();
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Ctx.Deallocate(this);
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}
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CXXBindTemporaryExpr *CXXBindTemporaryExpr::Create(ASTContext &C,
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CXXTemporary *Temp,
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Expr* SubExpr) {
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assert(SubExpr->getType()->isRecordType() &&
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"Expression bound to a temporary must have record type!");
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return new (C) CXXBindTemporaryExpr(Temp, SubExpr);
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}
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void CXXBindTemporaryExpr::DoDestroy(ASTContext &C) {
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Temp->Destroy(C);
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this->~CXXBindTemporaryExpr();
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C.Deallocate(this);
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}
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CXXTemporaryObjectExpr::CXXTemporaryObjectExpr(ASTContext &C,
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CXXConstructorDecl *Cons,
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QualType writtenTy,
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SourceLocation tyBeginLoc,
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Expr **Args,
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unsigned NumArgs,
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SourceLocation rParenLoc)
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: CXXConstructExpr(C, CXXTemporaryObjectExprClass, writtenTy, Cons,
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false, Args, NumArgs),
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TyBeginLoc(tyBeginLoc), RParenLoc(rParenLoc) {
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}
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CXXConstructExpr *CXXConstructExpr::Create(ASTContext &C, QualType T,
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CXXConstructorDecl *D, bool Elidable,
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Expr **Args, unsigned NumArgs) {
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return new (C) CXXConstructExpr(C, CXXConstructExprClass, T, D, Elidable,
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Args, NumArgs);
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}
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CXXConstructExpr::CXXConstructExpr(ASTContext &C, StmtClass SC, QualType T,
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CXXConstructorDecl *D, bool elidable,
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Expr **args, unsigned numargs)
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: Expr(SC, T,
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T->isDependentType(),
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(T->isDependentType() ||
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CallExpr::hasAnyValueDependentArguments(args, numargs))),
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Constructor(D), Elidable(elidable), Args(0), NumArgs(numargs) {
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if (NumArgs) {
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Args = new (C) Stmt*[NumArgs];
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for (unsigned i = 0; i != NumArgs; ++i) {
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assert(args[i] && "NULL argument in CXXConstructExpr");
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Args[i] = args[i];
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}
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}
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}
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CXXConstructExpr::CXXConstructExpr(EmptyShell Empty, ASTContext &C,
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unsigned numargs)
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: Expr(CXXConstructExprClass, Empty), Args(0), NumArgs(numargs)
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{
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if (NumArgs)
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Args = new (C) Stmt*[NumArgs];
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}
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void CXXConstructExpr::DoDestroy(ASTContext &C) {
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DestroyChildren(C);
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if (Args)
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C.Deallocate(Args);
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this->~CXXConstructExpr();
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C.Deallocate(this);
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}
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CXXExprWithTemporaries::CXXExprWithTemporaries(Expr *subexpr,
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CXXTemporary **temps,
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unsigned numtemps,
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bool shoulddestroytemps)
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: Expr(CXXExprWithTemporariesClass, subexpr->getType(),
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subexpr->isTypeDependent(), subexpr->isValueDependent()),
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SubExpr(subexpr), Temps(0), NumTemps(numtemps),
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ShouldDestroyTemps(shoulddestroytemps) {
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if (NumTemps > 0) {
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Temps = new CXXTemporary*[NumTemps];
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for (unsigned i = 0; i < NumTemps; ++i)
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Temps[i] = temps[i];
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}
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}
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CXXExprWithTemporaries *CXXExprWithTemporaries::Create(ASTContext &C,
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Expr *SubExpr,
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CXXTemporary **Temps,
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unsigned NumTemps,
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bool ShouldDestroyTemps){
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return new (C) CXXExprWithTemporaries(SubExpr, Temps, NumTemps,
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ShouldDestroyTemps);
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}
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void CXXExprWithTemporaries::DoDestroy(ASTContext &C) {
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DestroyChildren(C);
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this->~CXXExprWithTemporaries();
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C.Deallocate(this);
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}
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CXXExprWithTemporaries::~CXXExprWithTemporaries() {
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delete[] Temps;
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}
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// CXXBindTemporaryExpr
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Stmt::child_iterator CXXBindTemporaryExpr::child_begin() {
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return &SubExpr;
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}
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Stmt::child_iterator CXXBindTemporaryExpr::child_end() {
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return &SubExpr + 1;
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}
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// CXXConstructExpr
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Stmt::child_iterator CXXConstructExpr::child_begin() {
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return &Args[0];
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}
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Stmt::child_iterator CXXConstructExpr::child_end() {
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return &Args[0]+NumArgs;
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}
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// CXXExprWithTemporaries
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Stmt::child_iterator CXXExprWithTemporaries::child_begin() {
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return &SubExpr;
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}
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Stmt::child_iterator CXXExprWithTemporaries::child_end() {
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return &SubExpr + 1;
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}
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CXXUnresolvedConstructExpr::CXXUnresolvedConstructExpr(
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SourceLocation TyBeginLoc,
|
|
QualType T,
|
|
SourceLocation LParenLoc,
|
|
Expr **Args,
|
|
unsigned NumArgs,
|
|
SourceLocation RParenLoc)
|
|
: Expr(CXXUnresolvedConstructExprClass, T.getNonReferenceType(),
|
|
T->isDependentType(), true),
|
|
TyBeginLoc(TyBeginLoc),
|
|
Type(T),
|
|
LParenLoc(LParenLoc),
|
|
RParenLoc(RParenLoc),
|
|
NumArgs(NumArgs) {
|
|
Stmt **StoredArgs = reinterpret_cast<Stmt **>(this + 1);
|
|
memcpy(StoredArgs, Args, sizeof(Expr *) * NumArgs);
|
|
}
|
|
|
|
CXXUnresolvedConstructExpr *
|
|
CXXUnresolvedConstructExpr::Create(ASTContext &C,
|
|
SourceLocation TyBegin,
|
|
QualType T,
|
|
SourceLocation LParenLoc,
|
|
Expr **Args,
|
|
unsigned NumArgs,
|
|
SourceLocation RParenLoc) {
|
|
void *Mem = C.Allocate(sizeof(CXXUnresolvedConstructExpr) +
|
|
sizeof(Expr *) * NumArgs);
|
|
return new (Mem) CXXUnresolvedConstructExpr(TyBegin, T, LParenLoc,
|
|
Args, NumArgs, RParenLoc);
|
|
}
|
|
|
|
Stmt::child_iterator CXXUnresolvedConstructExpr::child_begin() {
|
|
return child_iterator(reinterpret_cast<Stmt **>(this + 1));
|
|
}
|
|
|
|
Stmt::child_iterator CXXUnresolvedConstructExpr::child_end() {
|
|
return child_iterator(reinterpret_cast<Stmt **>(this + 1) + NumArgs);
|
|
}
|
|
|
|
CXXUnresolvedMemberExpr::CXXUnresolvedMemberExpr(ASTContext &C,
|
|
Expr *Base, bool IsArrow,
|
|
SourceLocation OperatorLoc,
|
|
NestedNameSpecifier *Qualifier,
|
|
SourceRange QualifierRange,
|
|
NamedDecl *FirstQualifierFoundInScope,
|
|
DeclarationName Member,
|
|
SourceLocation MemberLoc,
|
|
bool HasExplicitTemplateArgs,
|
|
SourceLocation LAngleLoc,
|
|
const TemplateArgument *TemplateArgs,
|
|
unsigned NumTemplateArgs,
|
|
SourceLocation RAngleLoc)
|
|
: Expr(CXXUnresolvedMemberExprClass, C.DependentTy, true, true),
|
|
Base(Base), IsArrow(IsArrow),
|
|
HasExplicitTemplateArgumentList(HasExplicitTemplateArgs),
|
|
OperatorLoc(OperatorLoc),
|
|
Qualifier(Qualifier), QualifierRange(QualifierRange),
|
|
FirstQualifierFoundInScope(FirstQualifierFoundInScope),
|
|
Member(Member), MemberLoc(MemberLoc) {
|
|
if (HasExplicitTemplateArgumentList) {
|
|
ExplicitTemplateArgumentList *ETemplateArgs
|
|
= getExplicitTemplateArgumentList();
|
|
ETemplateArgs->LAngleLoc = LAngleLoc;
|
|
ETemplateArgs->RAngleLoc = RAngleLoc;
|
|
ETemplateArgs->NumTemplateArgs = NumTemplateArgs;
|
|
|
|
TemplateArgument *SavedTemplateArgs = ETemplateArgs->getTemplateArgs();
|
|
for (unsigned I = 0; I < NumTemplateArgs; ++I)
|
|
new (SavedTemplateArgs + I) TemplateArgument(TemplateArgs[I]);
|
|
}
|
|
}
|
|
|
|
CXXUnresolvedMemberExpr *
|
|
CXXUnresolvedMemberExpr::Create(ASTContext &C,
|
|
Expr *Base, bool IsArrow,
|
|
SourceLocation OperatorLoc,
|
|
NestedNameSpecifier *Qualifier,
|
|
SourceRange QualifierRange,
|
|
NamedDecl *FirstQualifierFoundInScope,
|
|
DeclarationName Member,
|
|
SourceLocation MemberLoc,
|
|
bool HasExplicitTemplateArgs,
|
|
SourceLocation LAngleLoc,
|
|
const TemplateArgument *TemplateArgs,
|
|
unsigned NumTemplateArgs,
|
|
SourceLocation RAngleLoc) {
|
|
if (!HasExplicitTemplateArgs)
|
|
return new (C) CXXUnresolvedMemberExpr(C, Base, IsArrow, OperatorLoc,
|
|
Qualifier, QualifierRange,
|
|
FirstQualifierFoundInScope,
|
|
Member, MemberLoc);
|
|
|
|
void *Mem = C.Allocate(sizeof(CXXUnresolvedMemberExpr) +
|
|
sizeof(ExplicitTemplateArgumentList) +
|
|
sizeof(TemplateArgument) * NumTemplateArgs,
|
|
llvm::alignof<CXXUnresolvedMemberExpr>());
|
|
return new (Mem) CXXUnresolvedMemberExpr(C, Base, IsArrow, OperatorLoc,
|
|
Qualifier, QualifierRange,
|
|
FirstQualifierFoundInScope,
|
|
Member,
|
|
MemberLoc,
|
|
HasExplicitTemplateArgs,
|
|
LAngleLoc,
|
|
TemplateArgs,
|
|
NumTemplateArgs,
|
|
RAngleLoc);
|
|
}
|
|
|
|
Stmt::child_iterator CXXUnresolvedMemberExpr::child_begin() {
|
|
return child_iterator(&Base);
|
|
}
|
|
|
|
Stmt::child_iterator CXXUnresolvedMemberExpr::child_end() {
|
|
return child_iterator(&Base + 1);
|
|
}
|