1 //===--- ExprCXX.h - Classes for representing expressions -------*- C++ -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
11 /// \brief Defines the clang::Expr interface and subclasses for C++ expressions.
13 //===----------------------------------------------------------------------===//
15 #ifndef LLVM_CLANG_AST_EXPRCXX_H
16 #define LLVM_CLANG_AST_EXPRCXX_H
18 #include "clang/AST/Decl.h"
19 #include "clang/AST/Expr.h"
20 #include "clang/AST/TemplateBase.h"
21 #include "clang/AST/UnresolvedSet.h"
22 #include "clang/Basic/ExpressionTraits.h"
23 #include "clang/AST/LambdaCapture.h"
24 #include "clang/Basic/TypeTraits.h"
25 #include "llvm/Support/Compiler.h"
29 class CXXConstructorDecl;
30 class CXXDestructorDecl;
34 class TemplateArgumentListInfo;
37 //===--------------------------------------------------------------------===//
39 //===--------------------------------------------------------------------===//
41 /// \brief A call to an overloaded operator written using operator
44 /// Represents a call to an overloaded operator written using operator
45 /// syntax, e.g., "x + y" or "*p". While semantically equivalent to a
46 /// normal call, this AST node provides better information about the
47 /// syntactic representation of the call.
49 /// In a C++ template, this expression node kind will be used whenever
50 /// any of the arguments are type-dependent. In this case, the
51 /// function itself will be a (possibly empty) set of functions and
52 /// function templates that were found by name lookup at template
54 class CXXOperatorCallExpr : public CallExpr {
55 /// \brief The overloaded operator.
56 OverloadedOperatorKind Operator;
59 // Record the FP_CONTRACT state that applies to this operator call. Only
60 // meaningful for floating point types. For other types this value can be
62 unsigned FPContractable : 1;
64 SourceRange getSourceRangeImpl() const LLVM_READONLY;
66 CXXOperatorCallExpr(ASTContext& C, OverloadedOperatorKind Op, Expr *fn,
67 ArrayRef<Expr*> args, QualType t, ExprValueKind VK,
68 SourceLocation operatorloc, bool fpContractable)
69 : CallExpr(C, CXXOperatorCallExprClass, fn, 0, args, t, VK,
71 Operator(Op), FPContractable(fpContractable) {
72 Range = getSourceRangeImpl();
74 explicit CXXOperatorCallExpr(ASTContext& C, EmptyShell Empty) :
75 CallExpr(C, CXXOperatorCallExprClass, Empty) { }
78 /// \brief Returns the kind of overloaded operator that this
79 /// expression refers to.
80 OverloadedOperatorKind getOperator() const { return Operator; }
82 /// \brief Returns the location of the operator symbol in the expression.
84 /// When \c getOperator()==OO_Call, this is the location of the right
85 /// parentheses; when \c getOperator()==OO_Subscript, this is the location
86 /// of the right bracket.
87 SourceLocation getOperatorLoc() const { return getRParenLoc(); }
89 SourceLocation getLocStart() const LLVM_READONLY { return Range.getBegin(); }
90 SourceLocation getLocEnd() const LLVM_READONLY { return Range.getEnd(); }
91 SourceRange getSourceRange() const { return Range; }
93 static bool classof(const Stmt *T) {
94 return T->getStmtClass() == CXXOperatorCallExprClass;
97 // Set the FP contractability status of this operator. Only meaningful for
98 // operations on floating point types.
99 void setFPContractable(bool FPC) { FPContractable = FPC; }
101 // Get the FP contractability status of this operator. Only meaningful for
102 // operations on floating point types.
103 bool isFPContractable() const { return FPContractable; }
105 friend class ASTStmtReader;
106 friend class ASTStmtWriter;
109 /// Represents a call to a member function that
110 /// may be written either with member call syntax (e.g., "obj.func()"
111 /// or "objptr->func()") or with normal function-call syntax
112 /// ("func()") within a member function that ends up calling a member
113 /// function. The callee in either case is a MemberExpr that contains
114 /// both the object argument and the member function, while the
115 /// arguments are the arguments within the parentheses (not including
116 /// the object argument).
117 class CXXMemberCallExpr : public CallExpr {
119 CXXMemberCallExpr(ASTContext &C, Expr *fn, ArrayRef<Expr*> args,
120 QualType t, ExprValueKind VK, SourceLocation RP)
121 : CallExpr(C, CXXMemberCallExprClass, fn, 0, args, t, VK, RP) {}
123 CXXMemberCallExpr(ASTContext &C, EmptyShell Empty)
124 : CallExpr(C, CXXMemberCallExprClass, Empty) { }
126 /// \brief Retrieves the implicit object argument for the member call.
128 /// For example, in "x.f(5)", this returns the sub-expression "x".
129 Expr *getImplicitObjectArgument() const;
131 /// \brief Retrieves the declaration of the called method.
132 CXXMethodDecl *getMethodDecl() const;
134 /// \brief Retrieves the CXXRecordDecl for the underlying type of
135 /// the implicit object argument.
137 /// Note that this is may not be the same declaration as that of the class
138 /// context of the CXXMethodDecl which this function is calling.
139 /// FIXME: Returns 0 for member pointer call exprs.
140 CXXRecordDecl *getRecordDecl() const;
142 static bool classof(const Stmt *T) {
143 return T->getStmtClass() == CXXMemberCallExprClass;
147 /// \brief Represents a call to a CUDA kernel function.
148 class CUDAKernelCallExpr : public CallExpr {
150 enum { CONFIG, END_PREARG };
153 CUDAKernelCallExpr(ASTContext &C, Expr *fn, CallExpr *Config,
154 ArrayRef<Expr*> args, QualType t, ExprValueKind VK,
156 : CallExpr(C, CUDAKernelCallExprClass, fn, END_PREARG, args, t, VK, RP) {
160 CUDAKernelCallExpr(ASTContext &C, EmptyShell Empty)
161 : CallExpr(C, CUDAKernelCallExprClass, END_PREARG, Empty) { }
163 const CallExpr *getConfig() const {
164 return cast_or_null<CallExpr>(getPreArg(CONFIG));
166 CallExpr *getConfig() { return cast_or_null<CallExpr>(getPreArg(CONFIG)); }
167 void setConfig(CallExpr *E) { setPreArg(CONFIG, E); }
169 static bool classof(const Stmt *T) {
170 return T->getStmtClass() == CUDAKernelCallExprClass;
174 /// \brief Abstract class common to all of the C++ "named"/"keyword" casts.
176 /// This abstract class is inherited by all of the classes
177 /// representing "named" casts: CXXStaticCastExpr for \c static_cast,
178 /// CXXDynamicCastExpr for \c dynamic_cast, CXXReinterpretCastExpr for
179 /// reinterpret_cast, and CXXConstCastExpr for \c const_cast.
180 class CXXNamedCastExpr : public ExplicitCastExpr {
182 SourceLocation Loc; // the location of the casting op
183 SourceLocation RParenLoc; // the location of the right parenthesis
184 SourceRange AngleBrackets; // range for '<' '>'
187 CXXNamedCastExpr(StmtClass SC, QualType ty, ExprValueKind VK,
188 CastKind kind, Expr *op, unsigned PathSize,
189 TypeSourceInfo *writtenTy, SourceLocation l,
190 SourceLocation RParenLoc,
191 SourceRange AngleBrackets)
192 : ExplicitCastExpr(SC, ty, VK, kind, op, PathSize, writtenTy), Loc(l),
193 RParenLoc(RParenLoc), AngleBrackets(AngleBrackets) {}
195 explicit CXXNamedCastExpr(StmtClass SC, EmptyShell Shell, unsigned PathSize)
196 : ExplicitCastExpr(SC, Shell, PathSize) { }
198 friend class ASTStmtReader;
201 const char *getCastName() const;
203 /// \brief Retrieve the location of the cast operator keyword, e.g.,
205 SourceLocation getOperatorLoc() const { return Loc; }
207 /// \brief Retrieve the location of the closing parenthesis.
208 SourceLocation getRParenLoc() const { return RParenLoc; }
210 SourceLocation getLocStart() const LLVM_READONLY { return Loc; }
211 SourceLocation getLocEnd() const LLVM_READONLY { return RParenLoc; }
212 SourceRange getAngleBrackets() const LLVM_READONLY { return AngleBrackets; }
214 static bool classof(const Stmt *T) {
215 switch (T->getStmtClass()) {
216 case CXXStaticCastExprClass:
217 case CXXDynamicCastExprClass:
218 case CXXReinterpretCastExprClass:
219 case CXXConstCastExprClass:
227 /// \brief A C++ \c static_cast expression (C++ [expr.static.cast]).
229 /// This expression node represents a C++ static cast, e.g.,
230 /// \c static_cast<int>(1.0).
231 class CXXStaticCastExpr : public CXXNamedCastExpr {
232 CXXStaticCastExpr(QualType ty, ExprValueKind vk, CastKind kind, Expr *op,
233 unsigned pathSize, TypeSourceInfo *writtenTy,
234 SourceLocation l, SourceLocation RParenLoc,
235 SourceRange AngleBrackets)
236 : CXXNamedCastExpr(CXXStaticCastExprClass, ty, vk, kind, op, pathSize,
237 writtenTy, l, RParenLoc, AngleBrackets) {}
239 explicit CXXStaticCastExpr(EmptyShell Empty, unsigned PathSize)
240 : CXXNamedCastExpr(CXXStaticCastExprClass, Empty, PathSize) { }
243 static CXXStaticCastExpr *Create(const ASTContext &Context, QualType T,
244 ExprValueKind VK, CastKind K, Expr *Op,
245 const CXXCastPath *Path,
246 TypeSourceInfo *Written, SourceLocation L,
247 SourceLocation RParenLoc,
248 SourceRange AngleBrackets);
249 static CXXStaticCastExpr *CreateEmpty(const ASTContext &Context,
252 static bool classof(const Stmt *T) {
253 return T->getStmtClass() == CXXStaticCastExprClass;
257 /// \brief A C++ @c dynamic_cast expression (C++ [expr.dynamic.cast]).
259 /// This expression node represents a dynamic cast, e.g.,
260 /// \c dynamic_cast<Derived*>(BasePtr). Such a cast may perform a run-time
261 /// check to determine how to perform the type conversion.
262 class CXXDynamicCastExpr : public CXXNamedCastExpr {
263 CXXDynamicCastExpr(QualType ty, ExprValueKind VK, CastKind kind,
264 Expr *op, unsigned pathSize, TypeSourceInfo *writtenTy,
265 SourceLocation l, SourceLocation RParenLoc,
266 SourceRange AngleBrackets)
267 : CXXNamedCastExpr(CXXDynamicCastExprClass, ty, VK, kind, op, pathSize,
268 writtenTy, l, RParenLoc, AngleBrackets) {}
270 explicit CXXDynamicCastExpr(EmptyShell Empty, unsigned pathSize)
271 : CXXNamedCastExpr(CXXDynamicCastExprClass, Empty, pathSize) { }
274 static CXXDynamicCastExpr *Create(const ASTContext &Context, QualType T,
275 ExprValueKind VK, CastKind Kind, Expr *Op,
276 const CXXCastPath *Path,
277 TypeSourceInfo *Written, SourceLocation L,
278 SourceLocation RParenLoc,
279 SourceRange AngleBrackets);
281 static CXXDynamicCastExpr *CreateEmpty(const ASTContext &Context,
284 bool isAlwaysNull() const;
286 static bool classof(const Stmt *T) {
287 return T->getStmtClass() == CXXDynamicCastExprClass;
291 /// \brief A C++ @c reinterpret_cast expression (C++ [expr.reinterpret.cast]).
293 /// This expression node represents a reinterpret cast, e.g.,
294 /// @c reinterpret_cast<int>(VoidPtr).
296 /// A reinterpret_cast provides a differently-typed view of a value but
297 /// (in Clang, as in most C++ implementations) performs no actual work at
299 class CXXReinterpretCastExpr : public CXXNamedCastExpr {
300 CXXReinterpretCastExpr(QualType ty, ExprValueKind vk, CastKind kind,
301 Expr *op, unsigned pathSize,
302 TypeSourceInfo *writtenTy, SourceLocation l,
303 SourceLocation RParenLoc,
304 SourceRange AngleBrackets)
305 : CXXNamedCastExpr(CXXReinterpretCastExprClass, ty, vk, kind, op,
306 pathSize, writtenTy, l, RParenLoc, AngleBrackets) {}
308 CXXReinterpretCastExpr(EmptyShell Empty, unsigned pathSize)
309 : CXXNamedCastExpr(CXXReinterpretCastExprClass, Empty, pathSize) { }
312 static CXXReinterpretCastExpr *Create(const ASTContext &Context, QualType T,
313 ExprValueKind VK, CastKind Kind,
314 Expr *Op, const CXXCastPath *Path,
315 TypeSourceInfo *WrittenTy, SourceLocation L,
316 SourceLocation RParenLoc,
317 SourceRange AngleBrackets);
318 static CXXReinterpretCastExpr *CreateEmpty(const ASTContext &Context,
321 static bool classof(const Stmt *T) {
322 return T->getStmtClass() == CXXReinterpretCastExprClass;
326 /// \brief A C++ \c const_cast expression (C++ [expr.const.cast]).
328 /// This expression node represents a const cast, e.g.,
329 /// \c const_cast<char*>(PtrToConstChar).
331 /// A const_cast can remove type qualifiers but does not change the underlying
333 class CXXConstCastExpr : public CXXNamedCastExpr {
334 CXXConstCastExpr(QualType ty, ExprValueKind VK, Expr *op,
335 TypeSourceInfo *writtenTy, SourceLocation l,
336 SourceLocation RParenLoc, SourceRange AngleBrackets)
337 : CXXNamedCastExpr(CXXConstCastExprClass, ty, VK, CK_NoOp, op,
338 0, writtenTy, l, RParenLoc, AngleBrackets) {}
340 explicit CXXConstCastExpr(EmptyShell Empty)
341 : CXXNamedCastExpr(CXXConstCastExprClass, Empty, 0) { }
344 static CXXConstCastExpr *Create(const ASTContext &Context, QualType T,
345 ExprValueKind VK, Expr *Op,
346 TypeSourceInfo *WrittenTy, SourceLocation L,
347 SourceLocation RParenLoc,
348 SourceRange AngleBrackets);
349 static CXXConstCastExpr *CreateEmpty(const ASTContext &Context);
351 static bool classof(const Stmt *T) {
352 return T->getStmtClass() == CXXConstCastExprClass;
356 /// \brief A call to a literal operator (C++11 [over.literal])
357 /// written as a user-defined literal (C++11 [lit.ext]).
359 /// Represents a user-defined literal, e.g. "foo"_bar or 1.23_xyz. While this
360 /// is semantically equivalent to a normal call, this AST node provides better
361 /// information about the syntactic representation of the literal.
363 /// Since literal operators are never found by ADL and can only be declared at
364 /// namespace scope, a user-defined literal is never dependent.
365 class UserDefinedLiteral : public CallExpr {
366 /// \brief The location of a ud-suffix within the literal.
367 SourceLocation UDSuffixLoc;
370 UserDefinedLiteral(const ASTContext &C, Expr *Fn, ArrayRef<Expr*> Args,
371 QualType T, ExprValueKind VK, SourceLocation LitEndLoc,
372 SourceLocation SuffixLoc)
373 : CallExpr(C, UserDefinedLiteralClass, Fn, 0, Args, T, VK, LitEndLoc),
374 UDSuffixLoc(SuffixLoc) {}
375 explicit UserDefinedLiteral(const ASTContext &C, EmptyShell Empty)
376 : CallExpr(C, UserDefinedLiteralClass, Empty) {}
378 /// The kind of literal operator which is invoked.
379 enum LiteralOperatorKind {
380 LOK_Raw, ///< Raw form: operator "" X (const char *)
381 LOK_Template, ///< Raw form: operator "" X<cs...> ()
382 LOK_Integer, ///< operator "" X (unsigned long long)
383 LOK_Floating, ///< operator "" X (long double)
384 LOK_String, ///< operator "" X (const CharT *, size_t)
385 LOK_Character ///< operator "" X (CharT)
388 /// \brief Returns the kind of literal operator invocation
389 /// which this expression represents.
390 LiteralOperatorKind getLiteralOperatorKind() const;
392 /// \brief If this is not a raw user-defined literal, get the
393 /// underlying cooked literal (representing the literal with the suffix
395 Expr *getCookedLiteral();
396 const Expr *getCookedLiteral() const {
397 return const_cast<UserDefinedLiteral*>(this)->getCookedLiteral();
400 SourceLocation getLocStart() const {
401 if (getLiteralOperatorKind() == LOK_Template)
402 return getRParenLoc();
403 return getArg(0)->getLocStart();
405 SourceLocation getLocEnd() const { return getRParenLoc(); }
408 /// \brief Returns the location of a ud-suffix in the expression.
410 /// For a string literal, there may be multiple identical suffixes. This
411 /// returns the first.
412 SourceLocation getUDSuffixLoc() const { return UDSuffixLoc; }
414 /// \brief Returns the ud-suffix specified for this literal.
415 const IdentifierInfo *getUDSuffix() const;
417 static bool classof(const Stmt *S) {
418 return S->getStmtClass() == UserDefinedLiteralClass;
421 friend class ASTStmtReader;
422 friend class ASTStmtWriter;
425 /// \brief A boolean literal, per ([C++ lex.bool] Boolean literals).
427 class CXXBoolLiteralExpr : public Expr {
431 CXXBoolLiteralExpr(bool val, QualType Ty, SourceLocation l) :
432 Expr(CXXBoolLiteralExprClass, Ty, VK_RValue, OK_Ordinary, false, false,
434 Value(val), Loc(l) {}
436 explicit CXXBoolLiteralExpr(EmptyShell Empty)
437 : Expr(CXXBoolLiteralExprClass, Empty) { }
439 bool getValue() const { return Value; }
440 void setValue(bool V) { Value = V; }
442 SourceLocation getLocStart() const LLVM_READONLY { return Loc; }
443 SourceLocation getLocEnd() const LLVM_READONLY { return Loc; }
445 SourceLocation getLocation() const { return Loc; }
446 void setLocation(SourceLocation L) { Loc = L; }
448 static bool classof(const Stmt *T) {
449 return T->getStmtClass() == CXXBoolLiteralExprClass;
453 child_range children() { return child_range(); }
456 /// \brief The null pointer literal (C++11 [lex.nullptr])
458 /// Introduced in C++11, the only literal of type \c nullptr_t is \c nullptr.
459 class CXXNullPtrLiteralExpr : public Expr {
462 CXXNullPtrLiteralExpr(QualType Ty, SourceLocation l) :
463 Expr(CXXNullPtrLiteralExprClass, Ty, VK_RValue, OK_Ordinary, false, false,
467 explicit CXXNullPtrLiteralExpr(EmptyShell Empty)
468 : Expr(CXXNullPtrLiteralExprClass, Empty) { }
470 SourceLocation getLocStart() const LLVM_READONLY { return Loc; }
471 SourceLocation getLocEnd() const LLVM_READONLY { return Loc; }
473 SourceLocation getLocation() const { return Loc; }
474 void setLocation(SourceLocation L) { Loc = L; }
476 static bool classof(const Stmt *T) {
477 return T->getStmtClass() == CXXNullPtrLiteralExprClass;
480 child_range children() { return child_range(); }
483 /// \brief Implicit construction of a std::initializer_list<T> object from an
484 /// array temporary within list-initialization (C++11 [dcl.init.list]p5).
485 class CXXStdInitializerListExpr : public Expr {
488 CXXStdInitializerListExpr(EmptyShell Empty)
489 : Expr(CXXStdInitializerListExprClass, Empty), SubExpr(nullptr) {}
492 CXXStdInitializerListExpr(QualType Ty, Expr *SubExpr)
493 : Expr(CXXStdInitializerListExprClass, Ty, VK_RValue, OK_Ordinary,
494 Ty->isDependentType(), SubExpr->isValueDependent(),
495 SubExpr->isInstantiationDependent(),
496 SubExpr->containsUnexpandedParameterPack()),
499 Expr *getSubExpr() { return static_cast<Expr*>(SubExpr); }
500 const Expr *getSubExpr() const { return static_cast<const Expr*>(SubExpr); }
502 SourceLocation getLocStart() const LLVM_READONLY {
503 return SubExpr->getLocStart();
505 SourceLocation getLocEnd() const LLVM_READONLY {
506 return SubExpr->getLocEnd();
508 SourceRange getSourceRange() const LLVM_READONLY {
509 return SubExpr->getSourceRange();
512 static bool classof(const Stmt *S) {
513 return S->getStmtClass() == CXXStdInitializerListExprClass;
516 child_range children() { return child_range(&SubExpr, &SubExpr + 1); }
518 friend class ASTReader;
519 friend class ASTStmtReader;
522 /// A C++ \c typeid expression (C++ [expr.typeid]), which gets
523 /// the \c type_info that corresponds to the supplied type, or the (possibly
524 /// dynamic) type of the supplied expression.
526 /// This represents code like \c typeid(int) or \c typeid(*objPtr)
527 class CXXTypeidExpr : public Expr {
529 llvm::PointerUnion<Stmt *, TypeSourceInfo *> Operand;
533 CXXTypeidExpr(QualType Ty, TypeSourceInfo *Operand, SourceRange R)
534 : Expr(CXXTypeidExprClass, Ty, VK_LValue, OK_Ordinary,
535 // typeid is never type-dependent (C++ [temp.dep.expr]p4)
537 // typeid is value-dependent if the type or expression are dependent
538 Operand->getType()->isDependentType(),
539 Operand->getType()->isInstantiationDependentType(),
540 Operand->getType()->containsUnexpandedParameterPack()),
541 Operand(Operand), Range(R) { }
543 CXXTypeidExpr(QualType Ty, Expr *Operand, SourceRange R)
544 : Expr(CXXTypeidExprClass, Ty, VK_LValue, OK_Ordinary,
545 // typeid is never type-dependent (C++ [temp.dep.expr]p4)
547 // typeid is value-dependent if the type or expression are dependent
548 Operand->isTypeDependent() || Operand->isValueDependent(),
549 Operand->isInstantiationDependent(),
550 Operand->containsUnexpandedParameterPack()),
551 Operand(Operand), Range(R) { }
553 CXXTypeidExpr(EmptyShell Empty, bool isExpr)
554 : Expr(CXXTypeidExprClass, Empty) {
556 Operand = (Expr*)nullptr;
558 Operand = (TypeSourceInfo*)nullptr;
561 /// Determine whether this typeid has a type operand which is potentially
562 /// evaluated, per C++11 [expr.typeid]p3.
563 bool isPotentiallyEvaluated() const;
565 bool isTypeOperand() const { return Operand.is<TypeSourceInfo *>(); }
567 /// \brief Retrieves the type operand of this typeid() expression after
568 /// various required adjustments (removing reference types, cv-qualifiers).
569 QualType getTypeOperand(ASTContext &Context) const;
571 /// \brief Retrieve source information for the type operand.
572 TypeSourceInfo *getTypeOperandSourceInfo() const {
573 assert(isTypeOperand() && "Cannot call getTypeOperand for typeid(expr)");
574 return Operand.get<TypeSourceInfo *>();
577 void setTypeOperandSourceInfo(TypeSourceInfo *TSI) {
578 assert(isTypeOperand() && "Cannot call getTypeOperand for typeid(expr)");
582 Expr *getExprOperand() const {
583 assert(!isTypeOperand() && "Cannot call getExprOperand for typeid(type)");
584 return static_cast<Expr*>(Operand.get<Stmt *>());
587 void setExprOperand(Expr *E) {
588 assert(!isTypeOperand() && "Cannot call getExprOperand for typeid(type)");
592 SourceLocation getLocStart() const LLVM_READONLY { return Range.getBegin(); }
593 SourceLocation getLocEnd() const LLVM_READONLY { return Range.getEnd(); }
594 SourceRange getSourceRange() const LLVM_READONLY { return Range; }
595 void setSourceRange(SourceRange R) { Range = R; }
597 static bool classof(const Stmt *T) {
598 return T->getStmtClass() == CXXTypeidExprClass;
602 child_range children() {
603 if (isTypeOperand()) return child_range();
604 Stmt **begin = reinterpret_cast<Stmt**>(&Operand);
605 return child_range(begin, begin + 1);
609 /// \brief A member reference to an MSPropertyDecl.
611 /// This expression always has pseudo-object type, and therefore it is
612 /// typically not encountered in a fully-typechecked expression except
613 /// within the syntactic form of a PseudoObjectExpr.
614 class MSPropertyRefExpr : public Expr {
616 MSPropertyDecl *TheDecl;
617 SourceLocation MemberLoc;
619 NestedNameSpecifierLoc QualifierLoc;
622 MSPropertyRefExpr(Expr *baseExpr, MSPropertyDecl *decl, bool isArrow,
623 QualType ty, ExprValueKind VK,
624 NestedNameSpecifierLoc qualifierLoc,
625 SourceLocation nameLoc)
626 : Expr(MSPropertyRefExprClass, ty, VK, OK_Ordinary,
627 /*type-dependent*/ false, baseExpr->isValueDependent(),
628 baseExpr->isInstantiationDependent(),
629 baseExpr->containsUnexpandedParameterPack()),
630 BaseExpr(baseExpr), TheDecl(decl),
631 MemberLoc(nameLoc), IsArrow(isArrow),
632 QualifierLoc(qualifierLoc) {}
634 MSPropertyRefExpr(EmptyShell Empty) : Expr(MSPropertyRefExprClass, Empty) {}
636 SourceRange getSourceRange() const LLVM_READONLY {
637 return SourceRange(getLocStart(), getLocEnd());
639 bool isImplicitAccess() const {
640 return getBaseExpr() && getBaseExpr()->isImplicitCXXThis();
642 SourceLocation getLocStart() const {
643 if (!isImplicitAccess())
644 return BaseExpr->getLocStart();
645 else if (QualifierLoc)
646 return QualifierLoc.getBeginLoc();
650 SourceLocation getLocEnd() const { return getMemberLoc(); }
652 child_range children() {
653 return child_range((Stmt**)&BaseExpr, (Stmt**)&BaseExpr + 1);
655 static bool classof(const Stmt *T) {
656 return T->getStmtClass() == MSPropertyRefExprClass;
659 Expr *getBaseExpr() const { return BaseExpr; }
660 MSPropertyDecl *getPropertyDecl() const { return TheDecl; }
661 bool isArrow() const { return IsArrow; }
662 SourceLocation getMemberLoc() const { return MemberLoc; }
663 NestedNameSpecifierLoc getQualifierLoc() const { return QualifierLoc; }
665 friend class ASTStmtReader;
668 /// A Microsoft C++ @c __uuidof expression, which gets
669 /// the _GUID that corresponds to the supplied type or expression.
671 /// This represents code like @c __uuidof(COMTYPE) or @c __uuidof(*comPtr)
672 class CXXUuidofExpr : public Expr {
674 llvm::PointerUnion<Stmt *, TypeSourceInfo *> Operand;
678 CXXUuidofExpr(QualType Ty, TypeSourceInfo *Operand, SourceRange R)
679 : Expr(CXXUuidofExprClass, Ty, VK_LValue, OK_Ordinary,
680 false, Operand->getType()->isDependentType(),
681 Operand->getType()->isInstantiationDependentType(),
682 Operand->getType()->containsUnexpandedParameterPack()),
683 Operand(Operand), Range(R) { }
685 CXXUuidofExpr(QualType Ty, Expr *Operand, SourceRange R)
686 : Expr(CXXUuidofExprClass, Ty, VK_LValue, OK_Ordinary,
687 false, Operand->isTypeDependent(),
688 Operand->isInstantiationDependent(),
689 Operand->containsUnexpandedParameterPack()),
690 Operand(Operand), Range(R) { }
692 CXXUuidofExpr(EmptyShell Empty, bool isExpr)
693 : Expr(CXXUuidofExprClass, Empty) {
695 Operand = (Expr*)nullptr;
697 Operand = (TypeSourceInfo*)nullptr;
700 bool isTypeOperand() const { return Operand.is<TypeSourceInfo *>(); }
702 /// \brief Retrieves the type operand of this __uuidof() expression after
703 /// various required adjustments (removing reference types, cv-qualifiers).
704 QualType getTypeOperand(ASTContext &Context) const;
706 /// \brief Retrieve source information for the type operand.
707 TypeSourceInfo *getTypeOperandSourceInfo() const {
708 assert(isTypeOperand() && "Cannot call getTypeOperand for __uuidof(expr)");
709 return Operand.get<TypeSourceInfo *>();
712 void setTypeOperandSourceInfo(TypeSourceInfo *TSI) {
713 assert(isTypeOperand() && "Cannot call getTypeOperand for __uuidof(expr)");
717 Expr *getExprOperand() const {
718 assert(!isTypeOperand() && "Cannot call getExprOperand for __uuidof(type)");
719 return static_cast<Expr*>(Operand.get<Stmt *>());
722 void setExprOperand(Expr *E) {
723 assert(!isTypeOperand() && "Cannot call getExprOperand for __uuidof(type)");
727 StringRef getUuidAsStringRef(ASTContext &Context) const;
729 SourceLocation getLocStart() const LLVM_READONLY { return Range.getBegin(); }
730 SourceLocation getLocEnd() const LLVM_READONLY { return Range.getEnd(); }
731 SourceRange getSourceRange() const LLVM_READONLY { return Range; }
732 void setSourceRange(SourceRange R) { Range = R; }
734 static bool classof(const Stmt *T) {
735 return T->getStmtClass() == CXXUuidofExprClass;
738 /// Grabs __declspec(uuid()) off a type, or returns 0 if we cannot resolve to
740 static const UuidAttr *GetUuidAttrOfType(QualType QT,
741 bool *HasMultipleGUIDsPtr = nullptr);
744 child_range children() {
745 if (isTypeOperand()) return child_range();
746 Stmt **begin = reinterpret_cast<Stmt**>(&Operand);
747 return child_range(begin, begin + 1);
751 /// \brief Represents the \c this expression in C++.
753 /// This is a pointer to the object on which the current member function is
754 /// executing (C++ [expr.prim]p3). Example:
760 /// void test() { this->bar(); }
763 class CXXThisExpr : public Expr {
768 CXXThisExpr(SourceLocation L, QualType Type, bool isImplicit)
769 : Expr(CXXThisExprClass, Type, VK_RValue, OK_Ordinary,
770 // 'this' is type-dependent if the class type of the enclosing
771 // member function is dependent (C++ [temp.dep.expr]p2)
772 Type->isDependentType(), Type->isDependentType(),
773 Type->isInstantiationDependentType(),
774 /*ContainsUnexpandedParameterPack=*/false),
775 Loc(L), Implicit(isImplicit) { }
777 CXXThisExpr(EmptyShell Empty) : Expr(CXXThisExprClass, Empty) {}
779 SourceLocation getLocation() const { return Loc; }
780 void setLocation(SourceLocation L) { Loc = L; }
782 SourceLocation getLocStart() const LLVM_READONLY { return Loc; }
783 SourceLocation getLocEnd() const LLVM_READONLY { return Loc; }
785 bool isImplicit() const { return Implicit; }
786 void setImplicit(bool I) { Implicit = I; }
788 static bool classof(const Stmt *T) {
789 return T->getStmtClass() == CXXThisExprClass;
793 child_range children() { return child_range(); }
796 /// \brief A C++ throw-expression (C++ [except.throw]).
798 /// This handles 'throw' (for re-throwing the current exception) and
799 /// 'throw' assignment-expression. When assignment-expression isn't
800 /// present, Op will be null.
801 class CXXThrowExpr : public Expr {
803 SourceLocation ThrowLoc;
804 /// \brief Whether the thrown variable (if any) is in scope.
805 unsigned IsThrownVariableInScope : 1;
807 friend class ASTStmtReader;
810 // \p Ty is the void type which is used as the result type of the
811 // expression. The \p l is the location of the throw keyword. \p expr
812 // can by null, if the optional expression to throw isn't present.
813 CXXThrowExpr(Expr *expr, QualType Ty, SourceLocation l,
814 bool IsThrownVariableInScope) :
815 Expr(CXXThrowExprClass, Ty, VK_RValue, OK_Ordinary, false, false,
816 expr && expr->isInstantiationDependent(),
817 expr && expr->containsUnexpandedParameterPack()),
818 Op(expr), ThrowLoc(l), IsThrownVariableInScope(IsThrownVariableInScope) {}
819 CXXThrowExpr(EmptyShell Empty) : Expr(CXXThrowExprClass, Empty) {}
821 const Expr *getSubExpr() const { return cast_or_null<Expr>(Op); }
822 Expr *getSubExpr() { return cast_or_null<Expr>(Op); }
824 SourceLocation getThrowLoc() const { return ThrowLoc; }
826 /// \brief Determines whether the variable thrown by this expression (if any!)
827 /// is within the innermost try block.
829 /// This information is required to determine whether the NRVO can apply to
831 bool isThrownVariableInScope() const { return IsThrownVariableInScope; }
833 SourceLocation getLocStart() const LLVM_READONLY { return ThrowLoc; }
834 SourceLocation getLocEnd() const LLVM_READONLY {
837 return getSubExpr()->getLocEnd();
840 static bool classof(const Stmt *T) {
841 return T->getStmtClass() == CXXThrowExprClass;
845 child_range children() {
846 return child_range(&Op, Op ? &Op+1 : &Op);
850 /// \brief A default argument (C++ [dcl.fct.default]).
852 /// This wraps up a function call argument that was created from the
853 /// corresponding parameter's default argument, when the call did not
854 /// explicitly supply arguments for all of the parameters.
855 class CXXDefaultArgExpr : public Expr {
856 /// \brief The parameter whose default is being used.
858 /// When the bit is set, the subexpression is stored after the
859 /// CXXDefaultArgExpr itself. When the bit is clear, the parameter's
860 /// actual default expression is the subexpression.
861 llvm::PointerIntPair<ParmVarDecl *, 1, bool> Param;
863 /// \brief The location where the default argument expression was used.
866 CXXDefaultArgExpr(StmtClass SC, SourceLocation Loc, ParmVarDecl *param)
868 param->hasUnparsedDefaultArg()
869 ? param->getType().getNonReferenceType()
870 : param->getDefaultArg()->getType(),
871 param->getDefaultArg()->getValueKind(),
872 param->getDefaultArg()->getObjectKind(), false, false, false, false),
873 Param(param, false), Loc(Loc) { }
875 CXXDefaultArgExpr(StmtClass SC, SourceLocation Loc, ParmVarDecl *param,
877 : Expr(SC, SubExpr->getType(),
878 SubExpr->getValueKind(), SubExpr->getObjectKind(),
879 false, false, false, false),
880 Param(param, true), Loc(Loc) {
881 *reinterpret_cast<Expr **>(this + 1) = SubExpr;
885 CXXDefaultArgExpr(EmptyShell Empty) : Expr(CXXDefaultArgExprClass, Empty) {}
887 // \p Param is the parameter whose default argument is used by this
889 static CXXDefaultArgExpr *Create(const ASTContext &C, SourceLocation Loc,
890 ParmVarDecl *Param) {
891 return new (C) CXXDefaultArgExpr(CXXDefaultArgExprClass, Loc, Param);
894 // \p Param is the parameter whose default argument is used by this
895 // expression, and \p SubExpr is the expression that will actually be used.
896 static CXXDefaultArgExpr *Create(const ASTContext &C, SourceLocation Loc,
897 ParmVarDecl *Param, Expr *SubExpr);
899 // Retrieve the parameter that the argument was created from.
900 const ParmVarDecl *getParam() const { return Param.getPointer(); }
901 ParmVarDecl *getParam() { return Param.getPointer(); }
903 // Retrieve the actual argument to the function call.
904 const Expr *getExpr() const {
906 return *reinterpret_cast<Expr const * const*> (this + 1);
907 return getParam()->getDefaultArg();
911 return *reinterpret_cast<Expr **> (this + 1);
912 return getParam()->getDefaultArg();
915 /// \brief Retrieve the location where this default argument was actually
917 SourceLocation getUsedLocation() const { return Loc; }
919 /// Default argument expressions have no representation in the
920 /// source, so they have an empty source range.
921 SourceLocation getLocStart() const LLVM_READONLY { return SourceLocation(); }
922 SourceLocation getLocEnd() const LLVM_READONLY { return SourceLocation(); }
924 SourceLocation getExprLoc() const LLVM_READONLY { return Loc; }
926 static bool classof(const Stmt *T) {
927 return T->getStmtClass() == CXXDefaultArgExprClass;
931 child_range children() { return child_range(); }
933 friend class ASTStmtReader;
934 friend class ASTStmtWriter;
937 /// \brief A use of a default initializer in a constructor or in aggregate
940 /// This wraps a use of a C++ default initializer (technically,
941 /// a brace-or-equal-initializer for a non-static data member) when it
942 /// is implicitly used in a mem-initializer-list in a constructor
943 /// (C++11 [class.base.init]p8) or in aggregate initialization
944 /// (C++1y [dcl.init.aggr]p7).
945 class CXXDefaultInitExpr : public Expr {
946 /// \brief The field whose default is being used.
949 /// \brief The location where the default initializer expression was used.
952 CXXDefaultInitExpr(const ASTContext &C, SourceLocation Loc, FieldDecl *Field,
955 CXXDefaultInitExpr(EmptyShell Empty) : Expr(CXXDefaultInitExprClass, Empty) {}
958 /// \p Field is the non-static data member whose default initializer is used
959 /// by this expression.
960 static CXXDefaultInitExpr *Create(const ASTContext &C, SourceLocation Loc,
962 return new (C) CXXDefaultInitExpr(C, Loc, Field, Field->getType());
965 /// \brief Get the field whose initializer will be used.
966 FieldDecl *getField() { return Field; }
967 const FieldDecl *getField() const { return Field; }
969 /// \brief Get the initialization expression that will be used.
970 const Expr *getExpr() const { return Field->getInClassInitializer(); }
971 Expr *getExpr() { return Field->getInClassInitializer(); }
973 SourceLocation getLocStart() const LLVM_READONLY { return Loc; }
974 SourceLocation getLocEnd() const LLVM_READONLY { return Loc; }
976 static bool classof(const Stmt *T) {
977 return T->getStmtClass() == CXXDefaultInitExprClass;
981 child_range children() { return child_range(); }
983 friend class ASTReader;
984 friend class ASTStmtReader;
987 /// \brief Represents a C++ temporary.
989 /// \brief The destructor that needs to be called.
990 const CXXDestructorDecl *Destructor;
992 explicit CXXTemporary(const CXXDestructorDecl *destructor)
993 : Destructor(destructor) { }
996 static CXXTemporary *Create(const ASTContext &C,
997 const CXXDestructorDecl *Destructor);
999 const CXXDestructorDecl *getDestructor() const { return Destructor; }
1000 void setDestructor(const CXXDestructorDecl *Dtor) {
1005 /// \brief Represents binding an expression to a temporary.
1007 /// This ensures the destructor is called for the temporary. It should only be
1008 /// needed for non-POD, non-trivially destructable class types. For example:
1012 /// S() { } // User defined constructor makes S non-POD.
1013 /// ~S() { } // User defined destructor makes it non-trivial.
1016 /// const S &s_ref = S(); // Requires a CXXBindTemporaryExpr.
1019 class CXXBindTemporaryExpr : public Expr {
1024 CXXBindTemporaryExpr(CXXTemporary *temp, Expr* SubExpr)
1025 : Expr(CXXBindTemporaryExprClass, SubExpr->getType(),
1026 VK_RValue, OK_Ordinary, SubExpr->isTypeDependent(),
1027 SubExpr->isValueDependent(),
1028 SubExpr->isInstantiationDependent(),
1029 SubExpr->containsUnexpandedParameterPack()),
1030 Temp(temp), SubExpr(SubExpr) { }
1033 CXXBindTemporaryExpr(EmptyShell Empty)
1034 : Expr(CXXBindTemporaryExprClass, Empty), Temp(nullptr), SubExpr(nullptr) {}
1036 static CXXBindTemporaryExpr *Create(const ASTContext &C, CXXTemporary *Temp,
1039 CXXTemporary *getTemporary() { return Temp; }
1040 const CXXTemporary *getTemporary() const { return Temp; }
1041 void setTemporary(CXXTemporary *T) { Temp = T; }
1043 const Expr *getSubExpr() const { return cast<Expr>(SubExpr); }
1044 Expr *getSubExpr() { return cast<Expr>(SubExpr); }
1045 void setSubExpr(Expr *E) { SubExpr = E; }
1047 SourceLocation getLocStart() const LLVM_READONLY {
1048 return SubExpr->getLocStart();
1050 SourceLocation getLocEnd() const LLVM_READONLY { return SubExpr->getLocEnd();}
1052 // Implement isa/cast/dyncast/etc.
1053 static bool classof(const Stmt *T) {
1054 return T->getStmtClass() == CXXBindTemporaryExprClass;
1058 child_range children() { return child_range(&SubExpr, &SubExpr + 1); }
1061 /// \brief Represents a call to a C++ constructor.
1062 class CXXConstructExpr : public Expr {
1064 enum ConstructionKind {
1072 CXXConstructorDecl *Constructor;
1075 SourceRange ParenOrBraceRange;
1076 unsigned NumArgs : 16;
1078 bool HadMultipleCandidates : 1;
1079 bool ListInitialization : 1;
1080 bool StdInitListInitialization : 1;
1081 bool ZeroInitialization : 1;
1082 unsigned ConstructKind : 2;
1086 CXXConstructExpr(const ASTContext &C, StmtClass SC, QualType T,
1088 CXXConstructorDecl *d, bool elidable,
1089 ArrayRef<Expr *> Args,
1090 bool HadMultipleCandidates,
1091 bool ListInitialization,
1092 bool StdInitListInitialization,
1093 bool ZeroInitialization,
1094 ConstructionKind ConstructKind,
1095 SourceRange ParenOrBraceRange);
1097 /// \brief Construct an empty C++ construction expression.
1098 CXXConstructExpr(StmtClass SC, EmptyShell Empty)
1099 : Expr(SC, Empty), Constructor(nullptr), NumArgs(0), Elidable(false),
1100 HadMultipleCandidates(false), ListInitialization(false),
1101 ZeroInitialization(false), ConstructKind(0), Args(nullptr)
1105 /// \brief Construct an empty C++ construction expression.
1106 explicit CXXConstructExpr(EmptyShell Empty)
1107 : Expr(CXXConstructExprClass, Empty), Constructor(nullptr),
1108 NumArgs(0), Elidable(false), HadMultipleCandidates(false),
1109 ListInitialization(false), ZeroInitialization(false),
1110 ConstructKind(0), Args(nullptr)
1113 static CXXConstructExpr *Create(const ASTContext &C, QualType T,
1115 CXXConstructorDecl *D, bool Elidable,
1116 ArrayRef<Expr *> Args,
1117 bool HadMultipleCandidates,
1118 bool ListInitialization,
1119 bool StdInitListInitialization,
1120 bool ZeroInitialization,
1121 ConstructionKind ConstructKind,
1122 SourceRange ParenOrBraceRange);
1124 CXXConstructorDecl* getConstructor() const { return Constructor; }
1125 void setConstructor(CXXConstructorDecl *C) { Constructor = C; }
1127 SourceLocation getLocation() const { return Loc; }
1128 void setLocation(SourceLocation Loc) { this->Loc = Loc; }
1130 /// \brief Whether this construction is elidable.
1131 bool isElidable() const { return Elidable; }
1132 void setElidable(bool E) { Elidable = E; }
1134 /// \brief Whether the referred constructor was resolved from
1135 /// an overloaded set having size greater than 1.
1136 bool hadMultipleCandidates() const { return HadMultipleCandidates; }
1137 void setHadMultipleCandidates(bool V) { HadMultipleCandidates = V; }
1139 /// \brief Whether this constructor call was written as list-initialization.
1140 bool isListInitialization() const { return ListInitialization; }
1141 void setListInitialization(bool V) { ListInitialization = V; }
1143 /// \brief Whether this constructor call was written as list-initialization,
1144 /// but was interpreted as forming a std::initializer_list<T> from the list
1145 /// and passing that as a single constructor argument.
1146 /// See C++11 [over.match.list]p1 bullet 1.
1147 bool isStdInitListInitialization() const { return StdInitListInitialization; }
1148 void setStdInitListInitialization(bool V) { StdInitListInitialization = V; }
1150 /// \brief Whether this construction first requires
1151 /// zero-initialization before the initializer is called.
1152 bool requiresZeroInitialization() const { return ZeroInitialization; }
1153 void setRequiresZeroInitialization(bool ZeroInit) {
1154 ZeroInitialization = ZeroInit;
1157 /// \brief Determine whether this constructor is actually constructing
1158 /// a base class (rather than a complete object).
1159 ConstructionKind getConstructionKind() const {
1160 return (ConstructionKind)ConstructKind;
1162 void setConstructionKind(ConstructionKind CK) {
1166 typedef ExprIterator arg_iterator;
1167 typedef ConstExprIterator const_arg_iterator;
1169 arg_iterator arg_begin() { return Args; }
1170 arg_iterator arg_end() { return Args + NumArgs; }
1171 const_arg_iterator arg_begin() const { return Args; }
1172 const_arg_iterator arg_end() const { return Args + NumArgs; }
1174 Expr **getArgs() { return reinterpret_cast<Expr **>(Args); }
1175 const Expr *const *getArgs() const {
1176 return const_cast<CXXConstructExpr *>(this)->getArgs();
1178 unsigned getNumArgs() const { return NumArgs; }
1180 /// \brief Return the specified argument.
1181 Expr *getArg(unsigned Arg) {
1182 assert(Arg < NumArgs && "Arg access out of range!");
1183 return cast<Expr>(Args[Arg]);
1185 const Expr *getArg(unsigned Arg) const {
1186 assert(Arg < NumArgs && "Arg access out of range!");
1187 return cast<Expr>(Args[Arg]);
1190 /// \brief Set the specified argument.
1191 void setArg(unsigned Arg, Expr *ArgExpr) {
1192 assert(Arg < NumArgs && "Arg access out of range!");
1193 Args[Arg] = ArgExpr;
1196 SourceLocation getLocStart() const LLVM_READONLY;
1197 SourceLocation getLocEnd() const LLVM_READONLY;
1198 SourceRange getParenOrBraceRange() const { return ParenOrBraceRange; }
1199 void setParenOrBraceRange(SourceRange Range) { ParenOrBraceRange = Range; }
1201 static bool classof(const Stmt *T) {
1202 return T->getStmtClass() == CXXConstructExprClass ||
1203 T->getStmtClass() == CXXTemporaryObjectExprClass;
1207 child_range children() {
1208 return child_range(&Args[0], &Args[0]+NumArgs);
1211 friend class ASTStmtReader;
1214 /// \brief Represents an explicit C++ type conversion that uses "functional"
1215 /// notation (C++ [expr.type.conv]).
1221 class CXXFunctionalCastExpr : public ExplicitCastExpr {
1222 SourceLocation LParenLoc;
1223 SourceLocation RParenLoc;
1225 CXXFunctionalCastExpr(QualType ty, ExprValueKind VK,
1226 TypeSourceInfo *writtenTy,
1227 CastKind kind, Expr *castExpr, unsigned pathSize,
1228 SourceLocation lParenLoc, SourceLocation rParenLoc)
1229 : ExplicitCastExpr(CXXFunctionalCastExprClass, ty, VK, kind,
1230 castExpr, pathSize, writtenTy),
1231 LParenLoc(lParenLoc), RParenLoc(rParenLoc) {}
1233 explicit CXXFunctionalCastExpr(EmptyShell Shell, unsigned PathSize)
1234 : ExplicitCastExpr(CXXFunctionalCastExprClass, Shell, PathSize) { }
1237 static CXXFunctionalCastExpr *Create(const ASTContext &Context, QualType T,
1239 TypeSourceInfo *Written,
1240 CastKind Kind, Expr *Op,
1241 const CXXCastPath *Path,
1242 SourceLocation LPLoc,
1243 SourceLocation RPLoc);
1244 static CXXFunctionalCastExpr *CreateEmpty(const ASTContext &Context,
1247 SourceLocation getLParenLoc() const { return LParenLoc; }
1248 void setLParenLoc(SourceLocation L) { LParenLoc = L; }
1249 SourceLocation getRParenLoc() const { return RParenLoc; }
1250 void setRParenLoc(SourceLocation L) { RParenLoc = L; }
1252 SourceLocation getLocStart() const LLVM_READONLY;
1253 SourceLocation getLocEnd() const LLVM_READONLY;
1255 static bool classof(const Stmt *T) {
1256 return T->getStmtClass() == CXXFunctionalCastExprClass;
1260 /// @brief Represents a C++ functional cast expression that builds a
1261 /// temporary object.
1263 /// This expression type represents a C++ "functional" cast
1264 /// (C++[expr.type.conv]) with N != 1 arguments that invokes a
1265 /// constructor to build a temporary object. With N == 1 arguments the
1266 /// functional cast expression will be represented by CXXFunctionalCastExpr.
1269 /// struct X { X(int, float); }
1272 /// return X(1, 3.14f); // creates a CXXTemporaryObjectExpr
1275 class CXXTemporaryObjectExpr : public CXXConstructExpr {
1276 TypeSourceInfo *Type;
1279 CXXTemporaryObjectExpr(const ASTContext &C, CXXConstructorDecl *Cons,
1280 TypeSourceInfo *Type,
1281 ArrayRef<Expr *> Args,
1282 SourceRange ParenOrBraceRange,
1283 bool HadMultipleCandidates,
1284 bool ListInitialization,
1285 bool StdInitListInitialization,
1286 bool ZeroInitialization);
1287 explicit CXXTemporaryObjectExpr(EmptyShell Empty)
1288 : CXXConstructExpr(CXXTemporaryObjectExprClass, Empty), Type() { }
1290 TypeSourceInfo *getTypeSourceInfo() const { return Type; }
1292 SourceLocation getLocStart() const LLVM_READONLY;
1293 SourceLocation getLocEnd() const LLVM_READONLY;
1295 static bool classof(const Stmt *T) {
1296 return T->getStmtClass() == CXXTemporaryObjectExprClass;
1299 friend class ASTStmtReader;
1302 /// \brief A C++ lambda expression, which produces a function object
1303 /// (of unspecified type) that can be invoked later.
1307 /// void low_pass_filter(std::vector<double> &values, double cutoff) {
1308 /// values.erase(std::remove_if(values.begin(), values.end(),
1309 /// [=](double value) { return value > cutoff; });
1313 /// C++11 lambda expressions can capture local variables, either by copying
1314 /// the values of those local variables at the time the function
1315 /// object is constructed (not when it is called!) or by holding a
1316 /// reference to the local variable. These captures can occur either
1317 /// implicitly or can be written explicitly between the square
1318 /// brackets ([...]) that start the lambda expression.
1320 /// C++1y introduces a new form of "capture" called an init-capture that
1321 /// includes an initializing expression (rather than capturing a variable),
1322 /// and which can never occur implicitly.
1323 class LambdaExpr : public Expr {
1324 /// \brief The source range that covers the lambda introducer ([...]).
1325 SourceRange IntroducerRange;
1327 /// \brief The source location of this lambda's capture-default ('=' or '&').
1328 SourceLocation CaptureDefaultLoc;
1330 /// \brief The number of captures.
1331 unsigned NumCaptures : 16;
1333 /// \brief The default capture kind, which is a value of type
1334 /// LambdaCaptureDefault.
1335 unsigned CaptureDefault : 2;
1337 /// \brief Whether this lambda had an explicit parameter list vs. an
1338 /// implicit (and empty) parameter list.
1339 unsigned ExplicitParams : 1;
1341 /// \brief Whether this lambda had the result type explicitly specified.
1342 unsigned ExplicitResultType : 1;
1344 /// \brief Whether there are any array index variables stored at the end of
1345 /// this lambda expression.
1346 unsigned HasArrayIndexVars : 1;
1348 /// \brief The location of the closing brace ('}') that completes
1351 /// The location of the brace is also available by looking up the
1352 /// function call operator in the lambda class. However, it is
1353 /// stored here to improve the performance of getSourceRange(), and
1354 /// to avoid having to deserialize the function call operator from a
1355 /// module file just to determine the source range.
1356 SourceLocation ClosingBrace;
1358 // Note: The capture initializers are stored directly after the lambda
1359 // expression, along with the index variables used to initialize by-copy
1362 typedef LambdaCapture Capture;
1364 /// \brief Construct a lambda expression.
1365 LambdaExpr(QualType T, SourceRange IntroducerRange,
1366 LambdaCaptureDefault CaptureDefault,
1367 SourceLocation CaptureDefaultLoc,
1368 ArrayRef<Capture> Captures,
1369 bool ExplicitParams,
1370 bool ExplicitResultType,
1371 ArrayRef<Expr *> CaptureInits,
1372 ArrayRef<VarDecl *> ArrayIndexVars,
1373 ArrayRef<unsigned> ArrayIndexStarts,
1374 SourceLocation ClosingBrace,
1375 bool ContainsUnexpandedParameterPack);
1377 /// \brief Construct an empty lambda expression.
1378 LambdaExpr(EmptyShell Empty, unsigned NumCaptures, bool HasArrayIndexVars)
1379 : Expr(LambdaExprClass, Empty),
1380 NumCaptures(NumCaptures), CaptureDefault(LCD_None), ExplicitParams(false),
1381 ExplicitResultType(false), HasArrayIndexVars(true) {
1382 getStoredStmts()[NumCaptures] = nullptr;
1385 Stmt **getStoredStmts() const {
1386 return reinterpret_cast<Stmt **>(const_cast<LambdaExpr *>(this) + 1);
1389 /// \brief Retrieve the mapping from captures to the first array index
1391 unsigned *getArrayIndexStarts() const {
1392 return reinterpret_cast<unsigned *>(getStoredStmts() + NumCaptures + 1);
1395 /// \brief Retrieve the complete set of array-index variables.
1396 VarDecl **getArrayIndexVars() const {
1397 unsigned ArrayIndexSize =
1398 llvm::RoundUpToAlignment(sizeof(unsigned) * (NumCaptures + 1),
1399 llvm::alignOf<VarDecl*>());
1400 return reinterpret_cast<VarDecl **>(
1401 reinterpret_cast<char*>(getArrayIndexStarts()) + ArrayIndexSize);
1405 /// \brief Construct a new lambda expression.
1406 static LambdaExpr *Create(const ASTContext &C,
1407 CXXRecordDecl *Class,
1408 SourceRange IntroducerRange,
1409 LambdaCaptureDefault CaptureDefault,
1410 SourceLocation CaptureDefaultLoc,
1411 ArrayRef<Capture> Captures,
1412 bool ExplicitParams,
1413 bool ExplicitResultType,
1414 ArrayRef<Expr *> CaptureInits,
1415 ArrayRef<VarDecl *> ArrayIndexVars,
1416 ArrayRef<unsigned> ArrayIndexStarts,
1417 SourceLocation ClosingBrace,
1418 bool ContainsUnexpandedParameterPack);
1420 /// \brief Construct a new lambda expression that will be deserialized from
1421 /// an external source.
1422 static LambdaExpr *CreateDeserialized(const ASTContext &C,
1423 unsigned NumCaptures,
1424 unsigned NumArrayIndexVars);
1426 /// \brief Determine the default capture kind for this lambda.
1427 LambdaCaptureDefault getCaptureDefault() const {
1428 return static_cast<LambdaCaptureDefault>(CaptureDefault);
1431 /// \brief Retrieve the location of this lambda's capture-default, if any.
1432 SourceLocation getCaptureDefaultLoc() const {
1433 return CaptureDefaultLoc;
1436 /// \brief An iterator that walks over the captures of the lambda,
1437 /// both implicit and explicit.
1438 typedef const Capture *capture_iterator;
1440 /// \brief An iterator over a range of lambda captures.
1441 typedef llvm::iterator_range<capture_iterator> capture_range;
1443 /// \brief Retrieve this lambda's captures.
1444 capture_range captures() const;
1446 /// \brief Retrieve an iterator pointing to the first lambda capture.
1447 capture_iterator capture_begin() const;
1449 /// \brief Retrieve an iterator pointing past the end of the
1450 /// sequence of lambda captures.
1451 capture_iterator capture_end() const;
1453 /// \brief Determine the number of captures in this lambda.
1454 unsigned capture_size() const { return NumCaptures; }
1456 /// \brief Retrieve this lambda's explicit captures.
1457 capture_range explicit_captures() const;
1459 /// \brief Retrieve an iterator pointing to the first explicit
1461 capture_iterator explicit_capture_begin() const;
1463 /// \brief Retrieve an iterator pointing past the end of the sequence of
1464 /// explicit lambda captures.
1465 capture_iterator explicit_capture_end() const;
1467 /// \brief Retrieve this lambda's implicit captures.
1468 capture_range implicit_captures() const;
1470 /// \brief Retrieve an iterator pointing to the first implicit
1472 capture_iterator implicit_capture_begin() const;
1474 /// \brief Retrieve an iterator pointing past the end of the sequence of
1475 /// implicit lambda captures.
1476 capture_iterator implicit_capture_end() const;
1478 /// \brief Iterator that walks over the capture initialization
1480 typedef Expr **capture_init_iterator;
1482 /// \brief Retrieve the initialization expressions for this lambda's captures.
1483 llvm::iterator_range<capture_init_iterator> capture_inits() const {
1484 return llvm::iterator_range<capture_init_iterator>(capture_init_begin(),
1485 capture_init_end());
1488 /// \brief Retrieve the first initialization argument for this
1489 /// lambda expression (which initializes the first capture field).
1490 capture_init_iterator capture_init_begin() const {
1491 return reinterpret_cast<Expr **>(getStoredStmts());
1494 /// \brief Retrieve the iterator pointing one past the last
1495 /// initialization argument for this lambda expression.
1496 capture_init_iterator capture_init_end() const {
1497 return capture_init_begin() + NumCaptures;
1500 /// \brief Retrieve the set of index variables used in the capture
1501 /// initializer of an array captured by copy.
1503 /// \param Iter The iterator that points at the capture initializer for
1504 /// which we are extracting the corresponding index variables.
1505 ArrayRef<VarDecl *> getCaptureInitIndexVars(capture_init_iterator Iter) const;
1507 /// \brief Retrieve the source range covering the lambda introducer,
1508 /// which contains the explicit capture list surrounded by square
1509 /// brackets ([...]).
1510 SourceRange getIntroducerRange() const { return IntroducerRange; }
1512 /// \brief Retrieve the class that corresponds to the lambda.
1514 /// This is the "closure type" (C++1y [expr.prim.lambda]), and stores the
1515 /// captures in its fields and provides the various operations permitted
1516 /// on a lambda (copying, calling).
1517 CXXRecordDecl *getLambdaClass() const;
1519 /// \brief Retrieve the function call operator associated with this
1520 /// lambda expression.
1521 CXXMethodDecl *getCallOperator() const;
1523 /// \brief If this is a generic lambda expression, retrieve the template
1524 /// parameter list associated with it, or else return null.
1525 TemplateParameterList *getTemplateParameterList() const;
1527 /// \brief Whether this is a generic lambda.
1528 bool isGenericLambda() const { return getTemplateParameterList(); }
1530 /// \brief Retrieve the body of the lambda.
1531 CompoundStmt *getBody() const;
1533 /// \brief Determine whether the lambda is mutable, meaning that any
1534 /// captures values can be modified.
1535 bool isMutable() const;
1537 /// \brief Determine whether this lambda has an explicit parameter
1538 /// list vs. an implicit (empty) parameter list.
1539 bool hasExplicitParameters() const { return ExplicitParams; }
1541 /// \brief Whether this lambda had its result type explicitly specified.
1542 bool hasExplicitResultType() const { return ExplicitResultType; }
1544 static bool classof(const Stmt *T) {
1545 return T->getStmtClass() == LambdaExprClass;
1548 SourceLocation getLocStart() const LLVM_READONLY {
1549 return IntroducerRange.getBegin();
1551 SourceLocation getLocEnd() const LLVM_READONLY { return ClosingBrace; }
1553 child_range children() {
1554 return child_range(getStoredStmts(), getStoredStmts() + NumCaptures + 1);
1557 friend class ASTStmtReader;
1558 friend class ASTStmtWriter;
1561 /// An expression "T()" which creates a value-initialized rvalue of type
1562 /// T, which is a non-class type. See (C++98 [5.2.3p2]).
1563 class CXXScalarValueInitExpr : public Expr {
1564 SourceLocation RParenLoc;
1565 TypeSourceInfo *TypeInfo;
1567 friend class ASTStmtReader;
1570 /// \brief Create an explicitly-written scalar-value initialization
1572 CXXScalarValueInitExpr(QualType Type,
1573 TypeSourceInfo *TypeInfo,
1574 SourceLocation rParenLoc ) :
1575 Expr(CXXScalarValueInitExprClass, Type, VK_RValue, OK_Ordinary,
1576 false, false, Type->isInstantiationDependentType(), false),
1577 RParenLoc(rParenLoc), TypeInfo(TypeInfo) {}
1579 explicit CXXScalarValueInitExpr(EmptyShell Shell)
1580 : Expr(CXXScalarValueInitExprClass, Shell) { }
1582 TypeSourceInfo *getTypeSourceInfo() const {
1586 SourceLocation getRParenLoc() const { return RParenLoc; }
1588 SourceLocation getLocStart() const LLVM_READONLY;
1589 SourceLocation getLocEnd() const LLVM_READONLY { return RParenLoc; }
1591 static bool classof(const Stmt *T) {
1592 return T->getStmtClass() == CXXScalarValueInitExprClass;
1596 child_range children() { return child_range(); }
1599 /// \brief Represents a new-expression for memory allocation and constructor
1600 /// calls, e.g: "new CXXNewExpr(foo)".
1601 class CXXNewExpr : public Expr {
1602 /// Contains an optional array size expression, an optional initialization
1603 /// expression, and any number of optional placement arguments, in that order.
1605 /// \brief Points to the allocation function used.
1606 FunctionDecl *OperatorNew;
1607 /// \brief Points to the deallocation function used in case of error. May be
1609 FunctionDecl *OperatorDelete;
1611 /// \brief The allocated type-source information, as written in the source.
1612 TypeSourceInfo *AllocatedTypeInfo;
1614 /// \brief If the allocated type was expressed as a parenthesized type-id,
1615 /// the source range covering the parenthesized type-id.
1616 SourceRange TypeIdParens;
1618 /// \brief Range of the entire new expression.
1621 /// \brief Source-range of a paren-delimited initializer.
1622 SourceRange DirectInitRange;
1624 /// Was the usage ::new, i.e. is the global new to be used?
1626 /// Do we allocate an array? If so, the first SubExpr is the size expression.
1628 /// If this is an array allocation, does the usual deallocation
1629 /// function for the allocated type want to know the allocated size?
1630 bool UsualArrayDeleteWantsSize : 1;
1631 /// The number of placement new arguments.
1632 unsigned NumPlacementArgs : 13;
1633 /// What kind of initializer do we have? Could be none, parens, or braces.
1634 /// In storage, we distinguish between "none, and no initializer expr", and
1635 /// "none, but an implicit initializer expr".
1636 unsigned StoredInitializationStyle : 2;
1638 friend class ASTStmtReader;
1639 friend class ASTStmtWriter;
1641 enum InitializationStyle {
1642 NoInit, ///< New-expression has no initializer as written.
1643 CallInit, ///< New-expression has a C++98 paren-delimited initializer.
1644 ListInit ///< New-expression has a C++11 list-initializer.
1647 CXXNewExpr(const ASTContext &C, bool globalNew, FunctionDecl *operatorNew,
1648 FunctionDecl *operatorDelete, bool usualArrayDeleteWantsSize,
1649 ArrayRef<Expr*> placementArgs,
1650 SourceRange typeIdParens, Expr *arraySize,
1651 InitializationStyle initializationStyle, Expr *initializer,
1652 QualType ty, TypeSourceInfo *AllocatedTypeInfo,
1653 SourceRange Range, SourceRange directInitRange);
1654 explicit CXXNewExpr(EmptyShell Shell)
1655 : Expr(CXXNewExprClass, Shell), SubExprs(nullptr) { }
1657 void AllocateArgsArray(const ASTContext &C, bool isArray,
1658 unsigned numPlaceArgs, bool hasInitializer);
1660 QualType getAllocatedType() const {
1661 assert(getType()->isPointerType());
1662 return getType()->getAs<PointerType>()->getPointeeType();
1665 TypeSourceInfo *getAllocatedTypeSourceInfo() const {
1666 return AllocatedTypeInfo;
1669 /// \brief True if the allocation result needs to be null-checked.
1671 /// C++11 [expr.new]p13:
1672 /// If the allocation function returns null, initialization shall
1673 /// not be done, the deallocation function shall not be called,
1674 /// and the value of the new-expression shall be null.
1676 /// An allocation function is not allowed to return null unless it
1677 /// has a non-throwing exception-specification. The '03 rule is
1678 /// identical except that the definition of a non-throwing
1679 /// exception specification is just "is it throw()?".
1680 bool shouldNullCheckAllocation(const ASTContext &Ctx) const;
1682 FunctionDecl *getOperatorNew() const { return OperatorNew; }
1683 void setOperatorNew(FunctionDecl *D) { OperatorNew = D; }
1684 FunctionDecl *getOperatorDelete() const { return OperatorDelete; }
1685 void setOperatorDelete(FunctionDecl *D) { OperatorDelete = D; }
1687 bool isArray() const { return Array; }
1688 Expr *getArraySize() {
1689 return Array ? cast<Expr>(SubExprs[0]) : nullptr;
1691 const Expr *getArraySize() const {
1692 return Array ? cast<Expr>(SubExprs[0]) : nullptr;
1695 unsigned getNumPlacementArgs() const { return NumPlacementArgs; }
1696 Expr **getPlacementArgs() {
1697 return reinterpret_cast<Expr **>(SubExprs + Array + hasInitializer());
1700 Expr *getPlacementArg(unsigned i) {
1701 assert(i < NumPlacementArgs && "Index out of range");
1702 return getPlacementArgs()[i];
1704 const Expr *getPlacementArg(unsigned i) const {
1705 assert(i < NumPlacementArgs && "Index out of range");
1706 return const_cast<CXXNewExpr*>(this)->getPlacementArg(i);
1709 bool isParenTypeId() const { return TypeIdParens.isValid(); }
1710 SourceRange getTypeIdParens() const { return TypeIdParens; }
1712 bool isGlobalNew() const { return GlobalNew; }
1714 /// \brief Whether this new-expression has any initializer at all.
1715 bool hasInitializer() const { return StoredInitializationStyle > 0; }
1717 /// \brief The kind of initializer this new-expression has.
1718 InitializationStyle getInitializationStyle() const {
1719 if (StoredInitializationStyle == 0)
1721 return static_cast<InitializationStyle>(StoredInitializationStyle-1);
1724 /// \brief The initializer of this new-expression.
1725 Expr *getInitializer() {
1726 return hasInitializer() ? cast<Expr>(SubExprs[Array]) : nullptr;
1728 const Expr *getInitializer() const {
1729 return hasInitializer() ? cast<Expr>(SubExprs[Array]) : nullptr;
1732 /// \brief Returns the CXXConstructExpr from this new-expression, or null.
1733 const CXXConstructExpr* getConstructExpr() const {
1734 return dyn_cast_or_null<CXXConstructExpr>(getInitializer());
1737 /// Answers whether the usual array deallocation function for the
1738 /// allocated type expects the size of the allocation as a
1740 bool doesUsualArrayDeleteWantSize() const {
1741 return UsualArrayDeleteWantsSize;
1744 typedef ExprIterator arg_iterator;
1745 typedef ConstExprIterator const_arg_iterator;
1747 arg_iterator placement_arg_begin() {
1748 return SubExprs + Array + hasInitializer();
1750 arg_iterator placement_arg_end() {
1751 return SubExprs + Array + hasInitializer() + getNumPlacementArgs();
1753 const_arg_iterator placement_arg_begin() const {
1754 return SubExprs + Array + hasInitializer();
1756 const_arg_iterator placement_arg_end() const {
1757 return SubExprs + Array + hasInitializer() + getNumPlacementArgs();
1760 typedef Stmt **raw_arg_iterator;
1761 raw_arg_iterator raw_arg_begin() { return SubExprs; }
1762 raw_arg_iterator raw_arg_end() {
1763 return SubExprs + Array + hasInitializer() + getNumPlacementArgs();
1765 const_arg_iterator raw_arg_begin() const { return SubExprs; }
1766 const_arg_iterator raw_arg_end() const {
1767 return SubExprs + Array + hasInitializer() + getNumPlacementArgs();
1770 SourceLocation getStartLoc() const { return Range.getBegin(); }
1771 SourceLocation getEndLoc() const { return Range.getEnd(); }
1773 SourceRange getDirectInitRange() const { return DirectInitRange; }
1775 SourceRange getSourceRange() const LLVM_READONLY {
1778 SourceLocation getLocStart() const LLVM_READONLY { return getStartLoc(); }
1779 SourceLocation getLocEnd() const LLVM_READONLY { return getEndLoc(); }
1781 static bool classof(const Stmt *T) {
1782 return T->getStmtClass() == CXXNewExprClass;
1786 child_range children() {
1787 return child_range(raw_arg_begin(), raw_arg_end());
1791 /// \brief Represents a \c delete expression for memory deallocation and
1792 /// destructor calls, e.g. "delete[] pArray".
1793 class CXXDeleteExpr : public Expr {
1794 /// Points to the operator delete overload that is used. Could be a member.
1795 FunctionDecl *OperatorDelete;
1796 /// The pointer expression to be deleted.
1798 /// Location of the expression.
1800 /// Is this a forced global delete, i.e. "::delete"?
1801 bool GlobalDelete : 1;
1802 /// Is this the array form of delete, i.e. "delete[]"?
1804 /// ArrayFormAsWritten can be different from ArrayForm if 'delete' is applied
1805 /// to pointer-to-array type (ArrayFormAsWritten will be false while ArrayForm
1807 bool ArrayFormAsWritten : 1;
1808 /// Does the usual deallocation function for the element type require
1809 /// a size_t argument?
1810 bool UsualArrayDeleteWantsSize : 1;
1812 CXXDeleteExpr(QualType ty, bool globalDelete, bool arrayForm,
1813 bool arrayFormAsWritten, bool usualArrayDeleteWantsSize,
1814 FunctionDecl *operatorDelete, Expr *arg, SourceLocation loc)
1815 : Expr(CXXDeleteExprClass, ty, VK_RValue, OK_Ordinary, false, false,
1816 arg->isInstantiationDependent(),
1817 arg->containsUnexpandedParameterPack()),
1818 OperatorDelete(operatorDelete), Argument(arg), Loc(loc),
1819 GlobalDelete(globalDelete),
1820 ArrayForm(arrayForm), ArrayFormAsWritten(arrayFormAsWritten),
1821 UsualArrayDeleteWantsSize(usualArrayDeleteWantsSize) { }
1822 explicit CXXDeleteExpr(EmptyShell Shell)
1823 : Expr(CXXDeleteExprClass, Shell), OperatorDelete(nullptr),
1824 Argument(nullptr) {}
1826 bool isGlobalDelete() const { return GlobalDelete; }
1827 bool isArrayForm() const { return ArrayForm; }
1828 bool isArrayFormAsWritten() const { return ArrayFormAsWritten; }
1830 /// Answers whether the usual array deallocation function for the
1831 /// allocated type expects the size of the allocation as a
1832 /// parameter. This can be true even if the actual deallocation
1833 /// function that we're using doesn't want a size.
1834 bool doesUsualArrayDeleteWantSize() const {
1835 return UsualArrayDeleteWantsSize;
1838 FunctionDecl *getOperatorDelete() const { return OperatorDelete; }
1840 Expr *getArgument() { return cast<Expr>(Argument); }
1841 const Expr *getArgument() const { return cast<Expr>(Argument); }
1843 /// \brief Retrieve the type being destroyed.
1845 /// If the type being destroyed is a dependent type which may or may not
1846 /// be a pointer, return an invalid type.
1847 QualType getDestroyedType() const;
1849 SourceLocation getLocStart() const LLVM_READONLY { return Loc; }
1850 SourceLocation getLocEnd() const LLVM_READONLY {return Argument->getLocEnd();}
1852 static bool classof(const Stmt *T) {
1853 return T->getStmtClass() == CXXDeleteExprClass;
1857 child_range children() { return child_range(&Argument, &Argument+1); }
1859 friend class ASTStmtReader;
1862 /// \brief Stores the type being destroyed by a pseudo-destructor expression.
1863 class PseudoDestructorTypeStorage {
1864 /// \brief Either the type source information or the name of the type, if
1865 /// it couldn't be resolved due to type-dependence.
1866 llvm::PointerUnion<TypeSourceInfo *, IdentifierInfo *> Type;
1868 /// \brief The starting source location of the pseudo-destructor type.
1869 SourceLocation Location;
1872 PseudoDestructorTypeStorage() { }
1874 PseudoDestructorTypeStorage(IdentifierInfo *II, SourceLocation Loc)
1875 : Type(II), Location(Loc) { }
1877 PseudoDestructorTypeStorage(TypeSourceInfo *Info);
1879 TypeSourceInfo *getTypeSourceInfo() const {
1880 return Type.dyn_cast<TypeSourceInfo *>();
1883 IdentifierInfo *getIdentifier() const {
1884 return Type.dyn_cast<IdentifierInfo *>();
1887 SourceLocation getLocation() const { return Location; }
1890 /// \brief Represents a C++ pseudo-destructor (C++ [expr.pseudo]).
1892 /// A pseudo-destructor is an expression that looks like a member access to a
1893 /// destructor of a scalar type, except that scalar types don't have
1894 /// destructors. For example:
1898 /// void f(int *p) {
1903 /// Pseudo-destructors typically occur when instantiating templates such as:
1906 /// template<typename T>
1907 /// void destroy(T* ptr) {
1912 /// for scalar types. A pseudo-destructor expression has no run-time semantics
1913 /// beyond evaluating the base expression.
1914 class CXXPseudoDestructorExpr : public Expr {
1915 /// \brief The base expression (that is being destroyed).
1918 /// \brief Whether the operator was an arrow ('->'); otherwise, it was a
1922 /// \brief The location of the '.' or '->' operator.
1923 SourceLocation OperatorLoc;
1925 /// \brief The nested-name-specifier that follows the operator, if present.
1926 NestedNameSpecifierLoc QualifierLoc;
1928 /// \brief The type that precedes the '::' in a qualified pseudo-destructor
1930 TypeSourceInfo *ScopeType;
1932 /// \brief The location of the '::' in a qualified pseudo-destructor
1934 SourceLocation ColonColonLoc;
1936 /// \brief The location of the '~'.
1937 SourceLocation TildeLoc;
1939 /// \brief The type being destroyed, or its name if we were unable to
1940 /// resolve the name.
1941 PseudoDestructorTypeStorage DestroyedType;
1943 friend class ASTStmtReader;
1946 CXXPseudoDestructorExpr(const ASTContext &Context,
1947 Expr *Base, bool isArrow, SourceLocation OperatorLoc,
1948 NestedNameSpecifierLoc QualifierLoc,
1949 TypeSourceInfo *ScopeType,
1950 SourceLocation ColonColonLoc,
1951 SourceLocation TildeLoc,
1952 PseudoDestructorTypeStorage DestroyedType);
1954 explicit CXXPseudoDestructorExpr(EmptyShell Shell)
1955 : Expr(CXXPseudoDestructorExprClass, Shell),
1956 Base(nullptr), IsArrow(false), QualifierLoc(), ScopeType(nullptr) { }
1958 Expr *getBase() const { return cast<Expr>(Base); }
1960 /// \brief Determines whether this member expression actually had
1961 /// a C++ nested-name-specifier prior to the name of the member, e.g.,
1963 bool hasQualifier() const { return QualifierLoc.hasQualifier(); }
1965 /// \brief Retrieves the nested-name-specifier that qualifies the type name,
1966 /// with source-location information.
1967 NestedNameSpecifierLoc getQualifierLoc() const { return QualifierLoc; }
1969 /// \brief If the member name was qualified, retrieves the
1970 /// nested-name-specifier that precedes the member name. Otherwise, returns
1972 NestedNameSpecifier *getQualifier() const {
1973 return QualifierLoc.getNestedNameSpecifier();
1976 /// \brief Determine whether this pseudo-destructor expression was written
1977 /// using an '->' (otherwise, it used a '.').
1978 bool isArrow() const { return IsArrow; }
1980 /// \brief Retrieve the location of the '.' or '->' operator.
1981 SourceLocation getOperatorLoc() const { return OperatorLoc; }
1983 /// \brief Retrieve the scope type in a qualified pseudo-destructor
1986 /// Pseudo-destructor expressions can have extra qualification within them
1987 /// that is not part of the nested-name-specifier, e.g., \c p->T::~T().
1988 /// Here, if the object type of the expression is (or may be) a scalar type,
1989 /// \p T may also be a scalar type and, therefore, cannot be part of a
1990 /// nested-name-specifier. It is stored as the "scope type" of the pseudo-
1991 /// destructor expression.
1992 TypeSourceInfo *getScopeTypeInfo() const { return ScopeType; }
1994 /// \brief Retrieve the location of the '::' in a qualified pseudo-destructor
1996 SourceLocation getColonColonLoc() const { return ColonColonLoc; }
1998 /// \brief Retrieve the location of the '~'.
1999 SourceLocation getTildeLoc() const { return TildeLoc; }
2001 /// \brief Retrieve the source location information for the type
2002 /// being destroyed.
2004 /// This type-source information is available for non-dependent
2005 /// pseudo-destructor expressions and some dependent pseudo-destructor
2006 /// expressions. Returns null if we only have the identifier for a
2007 /// dependent pseudo-destructor expression.
2008 TypeSourceInfo *getDestroyedTypeInfo() const {
2009 return DestroyedType.getTypeSourceInfo();
2012 /// \brief In a dependent pseudo-destructor expression for which we do not
2013 /// have full type information on the destroyed type, provides the name
2014 /// of the destroyed type.
2015 IdentifierInfo *getDestroyedTypeIdentifier() const {
2016 return DestroyedType.getIdentifier();
2019 /// \brief Retrieve the type being destroyed.
2020 QualType getDestroyedType() const;
2022 /// \brief Retrieve the starting location of the type being destroyed.
2023 SourceLocation getDestroyedTypeLoc() const {
2024 return DestroyedType.getLocation();
2027 /// \brief Set the name of destroyed type for a dependent pseudo-destructor
2029 void setDestroyedType(IdentifierInfo *II, SourceLocation Loc) {
2030 DestroyedType = PseudoDestructorTypeStorage(II, Loc);
2033 /// \brief Set the destroyed type.
2034 void setDestroyedType(TypeSourceInfo *Info) {
2035 DestroyedType = PseudoDestructorTypeStorage(Info);
2038 SourceLocation getLocStart() const LLVM_READONLY {return Base->getLocStart();}
2039 SourceLocation getLocEnd() const LLVM_READONLY;
2041 static bool classof(const Stmt *T) {
2042 return T->getStmtClass() == CXXPseudoDestructorExprClass;
2046 child_range children() { return child_range(&Base, &Base + 1); }
2049 /// \brief A type trait used in the implementation of various C++11 and
2050 /// Library TR1 trait templates.
2053 /// __is_pod(int) == true
2054 /// __is_enum(std::string) == false
2055 /// __is_trivially_constructible(vector<int>, int*, int*)
2057 class TypeTraitExpr : public Expr {
2058 /// \brief The location of the type trait keyword.
2061 /// \brief The location of the closing parenthesis.
2062 SourceLocation RParenLoc;
2064 // Note: The TypeSourceInfos for the arguments are allocated after the
2067 TypeTraitExpr(QualType T, SourceLocation Loc, TypeTrait Kind,
2068 ArrayRef<TypeSourceInfo *> Args,
2069 SourceLocation RParenLoc,
2072 TypeTraitExpr(EmptyShell Empty) : Expr(TypeTraitExprClass, Empty) { }
2074 /// \brief Retrieve the argument types.
2075 TypeSourceInfo **getTypeSourceInfos() {
2076 return reinterpret_cast<TypeSourceInfo **>(this+1);
2079 /// \brief Retrieve the argument types.
2080 TypeSourceInfo * const *getTypeSourceInfos() const {
2081 return reinterpret_cast<TypeSourceInfo * const*>(this+1);
2085 /// \brief Create a new type trait expression.
2086 static TypeTraitExpr *Create(const ASTContext &C, QualType T,
2087 SourceLocation Loc, TypeTrait Kind,
2088 ArrayRef<TypeSourceInfo *> Args,
2089 SourceLocation RParenLoc,
2092 static TypeTraitExpr *CreateDeserialized(const ASTContext &C,
2095 /// \brief Determine which type trait this expression uses.
2096 TypeTrait getTrait() const {
2097 return static_cast<TypeTrait>(TypeTraitExprBits.Kind);
2100 bool getValue() const {
2101 assert(!isValueDependent());
2102 return TypeTraitExprBits.Value;
2105 /// \brief Determine the number of arguments to this type trait.
2106 unsigned getNumArgs() const { return TypeTraitExprBits.NumArgs; }
2108 /// \brief Retrieve the Ith argument.
2109 TypeSourceInfo *getArg(unsigned I) const {
2110 assert(I < getNumArgs() && "Argument out-of-range");
2111 return getArgs()[I];
2114 /// \brief Retrieve the argument types.
2115 ArrayRef<TypeSourceInfo *> getArgs() const {
2116 return ArrayRef<TypeSourceInfo *>(getTypeSourceInfos(), getNumArgs());
2119 typedef TypeSourceInfo **arg_iterator;
2120 arg_iterator arg_begin() {
2121 return getTypeSourceInfos();
2123 arg_iterator arg_end() {
2124 return getTypeSourceInfos() + getNumArgs();
2127 typedef TypeSourceInfo const * const *arg_const_iterator;
2128 arg_const_iterator arg_begin() const { return getTypeSourceInfos(); }
2129 arg_const_iterator arg_end() const {
2130 return getTypeSourceInfos() + getNumArgs();
2133 SourceLocation getLocStart() const LLVM_READONLY { return Loc; }
2134 SourceLocation getLocEnd() const LLVM_READONLY { return RParenLoc; }
2136 static bool classof(const Stmt *T) {
2137 return T->getStmtClass() == TypeTraitExprClass;
2141 child_range children() { return child_range(); }
2143 friend class ASTStmtReader;
2144 friend class ASTStmtWriter;
2148 /// \brief An Embarcadero array type trait, as used in the implementation of
2149 /// __array_rank and __array_extent.
2153 /// __array_rank(int[10][20]) == 2
2154 /// __array_extent(int, 1) == 20
2156 class ArrayTypeTraitExpr : public Expr {
2157 virtual void anchor();
2159 /// \brief The trait. An ArrayTypeTrait enum in MSVC compat unsigned.
2162 /// \brief The value of the type trait. Unspecified if dependent.
2165 /// \brief The array dimension being queried, or -1 if not used.
2168 /// \brief The location of the type trait keyword.
2171 /// \brief The location of the closing paren.
2172 SourceLocation RParen;
2174 /// \brief The type being queried.
2175 TypeSourceInfo *QueriedType;
2178 ArrayTypeTraitExpr(SourceLocation loc, ArrayTypeTrait att,
2179 TypeSourceInfo *queried, uint64_t value,
2180 Expr *dimension, SourceLocation rparen, QualType ty)
2181 : Expr(ArrayTypeTraitExprClass, ty, VK_RValue, OK_Ordinary,
2182 false, queried->getType()->isDependentType(),
2183 (queried->getType()->isInstantiationDependentType() ||
2184 (dimension && dimension->isInstantiationDependent())),
2185 queried->getType()->containsUnexpandedParameterPack()),
2186 ATT(att), Value(value), Dimension(dimension),
2187 Loc(loc), RParen(rparen), QueriedType(queried) { }
2190 explicit ArrayTypeTraitExpr(EmptyShell Empty)
2191 : Expr(ArrayTypeTraitExprClass, Empty), ATT(0), Value(false),
2194 virtual ~ArrayTypeTraitExpr() { }
2196 SourceLocation getLocStart() const LLVM_READONLY { return Loc; }
2197 SourceLocation getLocEnd() const LLVM_READONLY { return RParen; }
2199 ArrayTypeTrait getTrait() const { return static_cast<ArrayTypeTrait>(ATT); }
2201 QualType getQueriedType() const { return QueriedType->getType(); }
2203 TypeSourceInfo *getQueriedTypeSourceInfo() const { return QueriedType; }
2205 uint64_t getValue() const { assert(!isTypeDependent()); return Value; }
2207 Expr *getDimensionExpression() const { return Dimension; }
2209 static bool classof(const Stmt *T) {
2210 return T->getStmtClass() == ArrayTypeTraitExprClass;
2214 child_range children() { return child_range(); }
2216 friend class ASTStmtReader;
2219 /// \brief An expression trait intrinsic.
2223 /// __is_lvalue_expr(std::cout) == true
2224 /// __is_lvalue_expr(1) == false
2226 class ExpressionTraitExpr : public Expr {
2227 /// \brief The trait. A ExpressionTrait enum in MSVC compatible unsigned.
2229 /// \brief The value of the type trait. Unspecified if dependent.
2232 /// \brief The location of the type trait keyword.
2235 /// \brief The location of the closing paren.
2236 SourceLocation RParen;
2238 /// \brief The expression being queried.
2239 Expr* QueriedExpression;
2241 ExpressionTraitExpr(SourceLocation loc, ExpressionTrait et,
2242 Expr *queried, bool value,
2243 SourceLocation rparen, QualType resultType)
2244 : Expr(ExpressionTraitExprClass, resultType, VK_RValue, OK_Ordinary,
2245 false, // Not type-dependent
2246 // Value-dependent if the argument is type-dependent.
2247 queried->isTypeDependent(),
2248 queried->isInstantiationDependent(),
2249 queried->containsUnexpandedParameterPack()),
2250 ET(et), Value(value), Loc(loc), RParen(rparen),
2251 QueriedExpression(queried) { }
2253 explicit ExpressionTraitExpr(EmptyShell Empty)
2254 : Expr(ExpressionTraitExprClass, Empty), ET(0), Value(false),
2255 QueriedExpression() { }
2257 SourceLocation getLocStart() const LLVM_READONLY { return Loc; }
2258 SourceLocation getLocEnd() const LLVM_READONLY { return RParen; }
2260 ExpressionTrait getTrait() const { return static_cast<ExpressionTrait>(ET); }
2262 Expr *getQueriedExpression() const { return QueriedExpression; }
2264 bool getValue() const { return Value; }
2266 static bool classof(const Stmt *T) {
2267 return T->getStmtClass() == ExpressionTraitExprClass;
2271 child_range children() { return child_range(); }
2273 friend class ASTStmtReader;
2277 /// \brief A reference to an overloaded function set, either an
2278 /// \c UnresolvedLookupExpr or an \c UnresolvedMemberExpr.
2279 class OverloadExpr : public Expr {
2280 /// \brief The common name of these declarations.
2281 DeclarationNameInfo NameInfo;
2283 /// \brief The nested-name-specifier that qualifies the name, if any.
2284 NestedNameSpecifierLoc QualifierLoc;
2286 /// The results. These are undesugared, which is to say, they may
2287 /// include UsingShadowDecls. Access is relative to the naming
2289 // FIXME: Allocate this data after the OverloadExpr subclass.
2290 DeclAccessPair *Results;
2291 unsigned NumResults;
2294 /// \brief Whether the name includes info for explicit template
2295 /// keyword and arguments.
2296 bool HasTemplateKWAndArgsInfo;
2298 /// \brief Return the optional template keyword and arguments info.
2299 ASTTemplateKWAndArgsInfo *getTemplateKWAndArgsInfo(); // defined far below.
2301 /// \brief Return the optional template keyword and arguments info.
2302 const ASTTemplateKWAndArgsInfo *getTemplateKWAndArgsInfo() const {
2303 return const_cast<OverloadExpr*>(this)->getTemplateKWAndArgsInfo();
2306 OverloadExpr(StmtClass K, const ASTContext &C,
2307 NestedNameSpecifierLoc QualifierLoc,
2308 SourceLocation TemplateKWLoc,
2309 const DeclarationNameInfo &NameInfo,
2310 const TemplateArgumentListInfo *TemplateArgs,
2311 UnresolvedSetIterator Begin, UnresolvedSetIterator End,
2312 bool KnownDependent,
2313 bool KnownInstantiationDependent,
2314 bool KnownContainsUnexpandedParameterPack);
2316 OverloadExpr(StmtClass K, EmptyShell Empty)
2317 : Expr(K, Empty), QualifierLoc(), Results(nullptr), NumResults(0),
2318 HasTemplateKWAndArgsInfo(false) { }
2320 void initializeResults(const ASTContext &C,
2321 UnresolvedSetIterator Begin,
2322 UnresolvedSetIterator End);
2326 OverloadExpr *Expression;
2327 bool IsAddressOfOperand;
2328 bool HasFormOfMemberPointer;
2331 /// \brief Finds the overloaded expression in the given expression \p E of
2334 /// \return the expression (which must be there) and true if it has
2335 /// the particular form of a member pointer expression
2336 static FindResult find(Expr *E) {
2337 assert(E->getType()->isSpecificBuiltinType(BuiltinType::Overload));
2341 E = E->IgnoreParens();
2342 if (isa<UnaryOperator>(E)) {
2343 assert(cast<UnaryOperator>(E)->getOpcode() == UO_AddrOf);
2344 E = cast<UnaryOperator>(E)->getSubExpr();
2345 OverloadExpr *Ovl = cast<OverloadExpr>(E->IgnoreParens());
2347 Result.HasFormOfMemberPointer = (E == Ovl && Ovl->getQualifier());
2348 Result.IsAddressOfOperand = true;
2349 Result.Expression = Ovl;
2351 Result.HasFormOfMemberPointer = false;
2352 Result.IsAddressOfOperand = false;
2353 Result.Expression = cast<OverloadExpr>(E);
2359 /// \brief Gets the naming class of this lookup, if any.
2360 CXXRecordDecl *getNamingClass() const;
2362 typedef UnresolvedSetImpl::iterator decls_iterator;
2363 decls_iterator decls_begin() const { return UnresolvedSetIterator(Results); }
2364 decls_iterator decls_end() const {
2365 return UnresolvedSetIterator(Results + NumResults);
2367 llvm::iterator_range<decls_iterator> decls() const {
2368 return llvm::iterator_range<decls_iterator>(decls_begin(), decls_end());
2371 /// \brief Gets the number of declarations in the unresolved set.
2372 unsigned getNumDecls() const { return NumResults; }
2374 /// \brief Gets the full name info.
2375 const DeclarationNameInfo &getNameInfo() const { return NameInfo; }
2377 /// \brief Gets the name looked up.
2378 DeclarationName getName() const { return NameInfo.getName(); }
2380 /// \brief Gets the location of the name.
2381 SourceLocation getNameLoc() const { return NameInfo.getLoc(); }
2383 /// \brief Fetches the nested-name qualifier, if one was given.
2384 NestedNameSpecifier *getQualifier() const {
2385 return QualifierLoc.getNestedNameSpecifier();
2388 /// \brief Fetches the nested-name qualifier with source-location
2389 /// information, if one was given.
2390 NestedNameSpecifierLoc getQualifierLoc() const { return QualifierLoc; }
2392 /// \brief Retrieve the location of the template keyword preceding
2393 /// this name, if any.
2394 SourceLocation getTemplateKeywordLoc() const {
2395 if (!HasTemplateKWAndArgsInfo) return SourceLocation();
2396 return getTemplateKWAndArgsInfo()->getTemplateKeywordLoc();
2399 /// \brief Retrieve the location of the left angle bracket starting the
2400 /// explicit template argument list following the name, if any.
2401 SourceLocation getLAngleLoc() const {
2402 if (!HasTemplateKWAndArgsInfo) return SourceLocation();
2403 return getTemplateKWAndArgsInfo()->LAngleLoc;
2406 /// \brief Retrieve the location of the right angle bracket ending the
2407 /// explicit template argument list following the name, if any.
2408 SourceLocation getRAngleLoc() const {
2409 if (!HasTemplateKWAndArgsInfo) return SourceLocation();
2410 return getTemplateKWAndArgsInfo()->RAngleLoc;
2413 /// \brief Determines whether the name was preceded by the template keyword.
2414 bool hasTemplateKeyword() const { return getTemplateKeywordLoc().isValid(); }
2416 /// \brief Determines whether this expression had explicit template arguments.
2417 bool hasExplicitTemplateArgs() const { return getLAngleLoc().isValid(); }
2419 // Note that, inconsistently with the explicit-template-argument AST
2420 // nodes, users are *forbidden* from calling these methods on objects
2421 // without explicit template arguments.
2423 ASTTemplateArgumentListInfo &getExplicitTemplateArgs() {
2424 assert(hasExplicitTemplateArgs());
2425 return *getTemplateKWAndArgsInfo();
2428 const ASTTemplateArgumentListInfo &getExplicitTemplateArgs() const {
2429 return const_cast<OverloadExpr*>(this)->getExplicitTemplateArgs();
2432 TemplateArgumentLoc const *getTemplateArgs() const {
2433 return getExplicitTemplateArgs().getTemplateArgs();
2436 unsigned getNumTemplateArgs() const {
2437 return getExplicitTemplateArgs().NumTemplateArgs;
2440 /// \brief Copies the template arguments into the given structure.
2441 void copyTemplateArgumentsInto(TemplateArgumentListInfo &List) const {
2442 getExplicitTemplateArgs().copyInto(List);
2445 /// \brief Retrieves the optional explicit template arguments.
2447 /// This points to the same data as getExplicitTemplateArgs(), but
2448 /// returns null if there are no explicit template arguments.
2449 const ASTTemplateArgumentListInfo *getOptionalExplicitTemplateArgs() const {
2450 if (!hasExplicitTemplateArgs()) return nullptr;
2451 return &getExplicitTemplateArgs();
2454 static bool classof(const Stmt *T) {
2455 return T->getStmtClass() == UnresolvedLookupExprClass ||
2456 T->getStmtClass() == UnresolvedMemberExprClass;
2459 friend class ASTStmtReader;
2460 friend class ASTStmtWriter;
2463 /// \brief A reference to a name which we were able to look up during
2464 /// parsing but could not resolve to a specific declaration.
2466 /// This arises in several ways:
2467 /// * we might be waiting for argument-dependent lookup;
2468 /// * the name might resolve to an overloaded function;
2470 /// * the lookup might have included a function template.
2472 /// These never include UnresolvedUsingValueDecls, which are always class
2473 /// members and therefore appear only in UnresolvedMemberLookupExprs.
2474 class UnresolvedLookupExpr : public OverloadExpr {
2475 /// True if these lookup results should be extended by
2476 /// argument-dependent lookup if this is the operand of a function
2480 /// True if these lookup results are overloaded. This is pretty
2481 /// trivially rederivable if we urgently need to kill this field.
2484 /// The naming class (C++ [class.access.base]p5) of the lookup, if
2485 /// any. This can generally be recalculated from the context chain,
2486 /// but that can be fairly expensive for unqualified lookups. If we
2487 /// want to improve memory use here, this could go in a union
2488 /// against the qualified-lookup bits.
2489 CXXRecordDecl *NamingClass;
2491 UnresolvedLookupExpr(const ASTContext &C,
2492 CXXRecordDecl *NamingClass,
2493 NestedNameSpecifierLoc QualifierLoc,
2494 SourceLocation TemplateKWLoc,
2495 const DeclarationNameInfo &NameInfo,
2496 bool RequiresADL, bool Overloaded,
2497 const TemplateArgumentListInfo *TemplateArgs,
2498 UnresolvedSetIterator Begin, UnresolvedSetIterator End)
2499 : OverloadExpr(UnresolvedLookupExprClass, C, QualifierLoc, TemplateKWLoc,
2500 NameInfo, TemplateArgs, Begin, End, false, false, false),
2501 RequiresADL(RequiresADL),
2502 Overloaded(Overloaded), NamingClass(NamingClass)
2505 UnresolvedLookupExpr(EmptyShell Empty)
2506 : OverloadExpr(UnresolvedLookupExprClass, Empty),
2507 RequiresADL(false), Overloaded(false), NamingClass(nullptr)
2510 friend class ASTStmtReader;
2513 static UnresolvedLookupExpr *Create(const ASTContext &C,
2514 CXXRecordDecl *NamingClass,
2515 NestedNameSpecifierLoc QualifierLoc,
2516 const DeclarationNameInfo &NameInfo,
2517 bool ADL, bool Overloaded,
2518 UnresolvedSetIterator Begin,
2519 UnresolvedSetIterator End) {
2520 return new(C) UnresolvedLookupExpr(C, NamingClass, QualifierLoc,
2521 SourceLocation(), NameInfo,
2522 ADL, Overloaded, nullptr, Begin, End);
2525 static UnresolvedLookupExpr *Create(const ASTContext &C,
2526 CXXRecordDecl *NamingClass,
2527 NestedNameSpecifierLoc QualifierLoc,
2528 SourceLocation TemplateKWLoc,
2529 const DeclarationNameInfo &NameInfo,
2531 const TemplateArgumentListInfo *Args,
2532 UnresolvedSetIterator Begin,
2533 UnresolvedSetIterator End);
2535 static UnresolvedLookupExpr *CreateEmpty(const ASTContext &C,
2536 bool HasTemplateKWAndArgsInfo,
2537 unsigned NumTemplateArgs);
2539 /// True if this declaration should be extended by
2540 /// argument-dependent lookup.
2541 bool requiresADL() const { return RequiresADL; }
2543 /// True if this lookup is overloaded.
2544 bool isOverloaded() const { return Overloaded; }
2546 /// Gets the 'naming class' (in the sense of C++0x
2547 /// [class.access.base]p5) of the lookup. This is the scope
2548 /// that was looked in to find these results.
2549 CXXRecordDecl *getNamingClass() const { return NamingClass; }
2551 SourceLocation getLocStart() const LLVM_READONLY {
2552 if (NestedNameSpecifierLoc l = getQualifierLoc())
2553 return l.getBeginLoc();
2554 return getNameInfo().getLocStart();
2556 SourceLocation getLocEnd() const LLVM_READONLY {
2557 if (hasExplicitTemplateArgs())
2558 return getRAngleLoc();
2559 return getNameInfo().getLocEnd();
2562 child_range children() { return child_range(); }
2564 static bool classof(const Stmt *T) {
2565 return T->getStmtClass() == UnresolvedLookupExprClass;
2569 /// \brief A qualified reference to a name whose declaration cannot
2570 /// yet be resolved.
2572 /// DependentScopeDeclRefExpr is similar to DeclRefExpr in that
2573 /// it expresses a reference to a declaration such as
2574 /// X<T>::value. The difference, however, is that an
2575 /// DependentScopeDeclRefExpr node is used only within C++ templates when
2576 /// the qualification (e.g., X<T>::) refers to a dependent type. In
2577 /// this case, X<T>::value cannot resolve to a declaration because the
2578 /// declaration will differ from one instantiation of X<T> to the
2579 /// next. Therefore, DependentScopeDeclRefExpr keeps track of the
2580 /// qualifier (X<T>::) and the name of the entity being referenced
2581 /// ("value"). Such expressions will instantiate to a DeclRefExpr once the
2582 /// declaration can be found.
2583 class DependentScopeDeclRefExpr : public Expr {
2584 /// \brief The nested-name-specifier that qualifies this unresolved
2585 /// declaration name.
2586 NestedNameSpecifierLoc QualifierLoc;
2588 /// \brief The name of the entity we will be referencing.
2589 DeclarationNameInfo NameInfo;
2591 /// \brief Whether the name includes info for explicit template
2592 /// keyword and arguments.
2593 bool HasTemplateKWAndArgsInfo;
2595 /// \brief Return the optional template keyword and arguments info.
2596 ASTTemplateKWAndArgsInfo *getTemplateKWAndArgsInfo() {
2597 if (!HasTemplateKWAndArgsInfo) return nullptr;
2598 return reinterpret_cast<ASTTemplateKWAndArgsInfo*>(this + 1);
2600 /// \brief Return the optional template keyword and arguments info.
2601 const ASTTemplateKWAndArgsInfo *getTemplateKWAndArgsInfo() const {
2602 return const_cast<DependentScopeDeclRefExpr*>(this)
2603 ->getTemplateKWAndArgsInfo();
2606 DependentScopeDeclRefExpr(QualType T,
2607 NestedNameSpecifierLoc QualifierLoc,
2608 SourceLocation TemplateKWLoc,
2609 const DeclarationNameInfo &NameInfo,
2610 const TemplateArgumentListInfo *Args);
2613 static DependentScopeDeclRefExpr *Create(const ASTContext &C,
2614 NestedNameSpecifierLoc QualifierLoc,
2615 SourceLocation TemplateKWLoc,
2616 const DeclarationNameInfo &NameInfo,
2617 const TemplateArgumentListInfo *TemplateArgs);
2619 static DependentScopeDeclRefExpr *CreateEmpty(const ASTContext &C,
2620 bool HasTemplateKWAndArgsInfo,
2621 unsigned NumTemplateArgs);
2623 /// \brief Retrieve the name that this expression refers to.
2624 const DeclarationNameInfo &getNameInfo() const { return NameInfo; }
2626 /// \brief Retrieve the name that this expression refers to.
2627 DeclarationName getDeclName() const { return NameInfo.getName(); }
2629 /// \brief Retrieve the location of the name within the expression.
2631 /// For example, in "X<T>::value" this is the location of "value".
2632 SourceLocation getLocation() const { return NameInfo.getLoc(); }
2634 /// \brief Retrieve the nested-name-specifier that qualifies the
2635 /// name, with source location information.
2636 NestedNameSpecifierLoc getQualifierLoc() const { return QualifierLoc; }
2638 /// \brief Retrieve the nested-name-specifier that qualifies this
2640 NestedNameSpecifier *getQualifier() const {
2641 return QualifierLoc.getNestedNameSpecifier();
2644 /// \brief Retrieve the location of the template keyword preceding
2645 /// this name, if any.
2646 SourceLocation getTemplateKeywordLoc() const {
2647 if (!HasTemplateKWAndArgsInfo) return SourceLocation();
2648 return getTemplateKWAndArgsInfo()->getTemplateKeywordLoc();
2651 /// \brief Retrieve the location of the left angle bracket starting the
2652 /// explicit template argument list following the name, if any.
2653 SourceLocation getLAngleLoc() const {
2654 if (!HasTemplateKWAndArgsInfo) return SourceLocation();
2655 return getTemplateKWAndArgsInfo()->LAngleLoc;
2658 /// \brief Retrieve the location of the right angle bracket ending the
2659 /// explicit template argument list following the name, if any.
2660 SourceLocation getRAngleLoc() const {
2661 if (!HasTemplateKWAndArgsInfo) return SourceLocation();
2662 return getTemplateKWAndArgsInfo()->RAngleLoc;
2665 /// Determines whether the name was preceded by the template keyword.
2666 bool hasTemplateKeyword() const { return getTemplateKeywordLoc().isValid(); }
2668 /// Determines whether this lookup had explicit template arguments.
2669 bool hasExplicitTemplateArgs() const { return getLAngleLoc().isValid(); }
2671 // Note that, inconsistently with the explicit-template-argument AST
2672 // nodes, users are *forbidden* from calling these methods on objects
2673 // without explicit template arguments.
2675 ASTTemplateArgumentListInfo &getExplicitTemplateArgs() {
2676 assert(hasExplicitTemplateArgs());
2677 return *reinterpret_cast<ASTTemplateArgumentListInfo*>(this + 1);
2680 /// Gets a reference to the explicit template argument list.
2681 const ASTTemplateArgumentListInfo &getExplicitTemplateArgs() const {
2682 assert(hasExplicitTemplateArgs());
2683 return *reinterpret_cast<const ASTTemplateArgumentListInfo*>(this + 1);
2686 /// \brief Retrieves the optional explicit template arguments.
2688 /// This points to the same data as getExplicitTemplateArgs(), but
2689 /// returns null if there are no explicit template arguments.
2690 const ASTTemplateArgumentListInfo *getOptionalExplicitTemplateArgs() const {
2691 if (!hasExplicitTemplateArgs()) return nullptr;
2692 return &getExplicitTemplateArgs();
2695 /// \brief Copies the template arguments (if present) into the given
2697 void copyTemplateArgumentsInto(TemplateArgumentListInfo &List) const {
2698 getExplicitTemplateArgs().copyInto(List);
2701 TemplateArgumentLoc const *getTemplateArgs() const {
2702 return getExplicitTemplateArgs().getTemplateArgs();
2705 unsigned getNumTemplateArgs() const {
2706 return getExplicitTemplateArgs().NumTemplateArgs;
2709 /// Note: getLocStart() is the start of the whole DependentScopeDeclRefExpr,
2710 /// and differs from getLocation().getStart().
2711 SourceLocation getLocStart() const LLVM_READONLY {
2712 return QualifierLoc.getBeginLoc();
2714 SourceLocation getLocEnd() const LLVM_READONLY {
2715 if (hasExplicitTemplateArgs())
2716 return getRAngleLoc();
2717 return getLocation();
2720 static bool classof(const Stmt *T) {
2721 return T->getStmtClass() == DependentScopeDeclRefExprClass;
2724 child_range children() { return child_range(); }
2726 friend class ASTStmtReader;
2727 friend class ASTStmtWriter;
2730 /// Represents an expression -- generally a full-expression -- that
2731 /// introduces cleanups to be run at the end of the sub-expression's
2732 /// evaluation. The most common source of expression-introduced
2733 /// cleanups is temporary objects in C++, but several other kinds of
2734 /// expressions can create cleanups, including basically every
2735 /// call in ARC that returns an Objective-C pointer.
2737 /// This expression also tracks whether the sub-expression contains a
2738 /// potentially-evaluated block literal. The lifetime of a block
2739 /// literal is the extent of the enclosing scope.
2740 class ExprWithCleanups : public Expr {
2742 /// The type of objects that are kept in the cleanup.
2743 /// It's useful to remember the set of blocks; we could also
2744 /// remember the set of temporaries, but there's currently
2746 typedef BlockDecl *CleanupObject;
2751 ExprWithCleanups(EmptyShell, unsigned NumObjects);
2752 ExprWithCleanups(Expr *SubExpr, ArrayRef<CleanupObject> Objects);
2754 CleanupObject *getObjectsBuffer() {
2755 return reinterpret_cast<CleanupObject*>(this + 1);
2757 const CleanupObject *getObjectsBuffer() const {
2758 return reinterpret_cast<const CleanupObject*>(this + 1);
2760 friend class ASTStmtReader;
2763 static ExprWithCleanups *Create(const ASTContext &C, EmptyShell empty,
2764 unsigned numObjects);
2766 static ExprWithCleanups *Create(const ASTContext &C, Expr *subexpr,
2767 ArrayRef<CleanupObject> objects);
2769 ArrayRef<CleanupObject> getObjects() const {
2770 return ArrayRef<CleanupObject>(getObjectsBuffer(), getNumObjects());
2773 unsigned getNumObjects() const { return ExprWithCleanupsBits.NumObjects; }
2775 CleanupObject getObject(unsigned i) const {
2776 assert(i < getNumObjects() && "Index out of range");
2777 return getObjects()[i];
2780 Expr *getSubExpr() { return cast<Expr>(SubExpr); }
2781 const Expr *getSubExpr() const { return cast<Expr>(SubExpr); }
2783 /// As with any mutator of the AST, be very careful
2784 /// when modifying an existing AST to preserve its invariants.
2785 void setSubExpr(Expr *E) { SubExpr = E; }
2787 SourceLocation getLocStart() const LLVM_READONLY {
2788 return SubExpr->getLocStart();
2790 SourceLocation getLocEnd() const LLVM_READONLY { return SubExpr->getLocEnd();}
2792 // Implement isa/cast/dyncast/etc.
2793 static bool classof(const Stmt *T) {
2794 return T->getStmtClass() == ExprWithCleanupsClass;
2798 child_range children() { return child_range(&SubExpr, &SubExpr + 1); }
2801 /// \brief Describes an explicit type conversion that uses functional
2802 /// notion but could not be resolved because one or more arguments are
2805 /// The explicit type conversions expressed by
2806 /// CXXUnresolvedConstructExpr have the form <tt>T(a1, a2, ..., aN)</tt>,
2807 /// where \c T is some type and \c a1, \c a2, ..., \c aN are values, and
2808 /// either \c T is a dependent type or one or more of the <tt>a</tt>'s is
2809 /// type-dependent. For example, this would occur in a template such
2813 /// template<typename T, typename A1>
2814 /// inline T make_a(const A1& a1) {
2819 /// When the returned expression is instantiated, it may resolve to a
2820 /// constructor call, conversion function call, or some kind of type
2822 class CXXUnresolvedConstructExpr : public Expr {
2823 /// \brief The type being constructed.
2824 TypeSourceInfo *Type;
2826 /// \brief The location of the left parentheses ('(').
2827 SourceLocation LParenLoc;
2829 /// \brief The location of the right parentheses (')').
2830 SourceLocation RParenLoc;
2832 /// \brief The number of arguments used to construct the type.
2835 CXXUnresolvedConstructExpr(TypeSourceInfo *Type,
2836 SourceLocation LParenLoc,
2837 ArrayRef<Expr*> Args,
2838 SourceLocation RParenLoc);
2840 CXXUnresolvedConstructExpr(EmptyShell Empty, unsigned NumArgs)
2841 : Expr(CXXUnresolvedConstructExprClass, Empty), Type(), NumArgs(NumArgs) { }
2843 friend class ASTStmtReader;
2846 static CXXUnresolvedConstructExpr *Create(const ASTContext &C,
2847 TypeSourceInfo *Type,
2848 SourceLocation LParenLoc,
2849 ArrayRef<Expr*> Args,
2850 SourceLocation RParenLoc);
2852 static CXXUnresolvedConstructExpr *CreateEmpty(const ASTContext &C,
2855 /// \brief Retrieve the type that is being constructed, as specified
2856 /// in the source code.
2857 QualType getTypeAsWritten() const { return Type->getType(); }
2859 /// \brief Retrieve the type source information for the type being
2861 TypeSourceInfo *getTypeSourceInfo() const { return Type; }
2863 /// \brief Retrieve the location of the left parentheses ('(') that
2864 /// precedes the argument list.
2865 SourceLocation getLParenLoc() const { return LParenLoc; }
2866 void setLParenLoc(SourceLocation L) { LParenLoc = L; }
2868 /// \brief Retrieve the location of the right parentheses (')') that
2869 /// follows the argument list.
2870 SourceLocation getRParenLoc() const { return RParenLoc; }
2871 void setRParenLoc(SourceLocation L) { RParenLoc = L; }
2873 /// \brief Retrieve the number of arguments.
2874 unsigned arg_size() const { return NumArgs; }
2876 typedef Expr** arg_iterator;
2877 arg_iterator arg_begin() { return reinterpret_cast<Expr**>(this + 1); }
2878 arg_iterator arg_end() { return arg_begin() + NumArgs; }
2880 typedef const Expr* const * const_arg_iterator;
2881 const_arg_iterator arg_begin() const {
2882 return reinterpret_cast<const Expr* const *>(this + 1);
2884 const_arg_iterator arg_end() const {
2885 return arg_begin() + NumArgs;
2888 Expr *getArg(unsigned I) {
2889 assert(I < NumArgs && "Argument index out-of-range");
2890 return *(arg_begin() + I);
2893 const Expr *getArg(unsigned I) const {
2894 assert(I < NumArgs && "Argument index out-of-range");
2895 return *(arg_begin() + I);
2898 void setArg(unsigned I, Expr *E) {
2899 assert(I < NumArgs && "Argument index out-of-range");
2900 *(arg_begin() + I) = E;
2903 SourceLocation getLocStart() const LLVM_READONLY;
2904 SourceLocation getLocEnd() const LLVM_READONLY {
2905 assert(RParenLoc.isValid() || NumArgs == 1);
2906 return RParenLoc.isValid() ? RParenLoc : getArg(0)->getLocEnd();
2909 static bool classof(const Stmt *T) {
2910 return T->getStmtClass() == CXXUnresolvedConstructExprClass;
2914 child_range children() {
2915 Stmt **begin = reinterpret_cast<Stmt**>(this+1);
2916 return child_range(begin, begin + NumArgs);
2920 /// \brief Represents a C++ member access expression where the actual
2921 /// member referenced could not be resolved because the base
2922 /// expression or the member name was dependent.
2924 /// Like UnresolvedMemberExprs, these can be either implicit or
2925 /// explicit accesses. It is only possible to get one of these with
2926 /// an implicit access if a qualifier is provided.
2927 class CXXDependentScopeMemberExpr : public Expr {
2928 /// \brief The expression for the base pointer or class reference,
2929 /// e.g., the \c x in x.f. Can be null in implicit accesses.
2932 /// \brief The type of the base expression. Never null, even for
2933 /// implicit accesses.
2936 /// \brief Whether this member expression used the '->' operator or
2937 /// the '.' operator.
2940 /// \brief Whether this member expression has info for explicit template
2941 /// keyword and arguments.
2942 bool HasTemplateKWAndArgsInfo : 1;
2944 /// \brief The location of the '->' or '.' operator.
2945 SourceLocation OperatorLoc;
2947 /// \brief The nested-name-specifier that precedes the member name, if any.
2948 NestedNameSpecifierLoc QualifierLoc;
2950 /// \brief In a qualified member access expression such as t->Base::f, this
2951 /// member stores the resolves of name lookup in the context of the member
2952 /// access expression, to be used at instantiation time.
2954 /// FIXME: This member, along with the QualifierLoc, could
2955 /// be stuck into a structure that is optionally allocated at the end of
2956 /// the CXXDependentScopeMemberExpr, to save space in the common case.
2957 NamedDecl *FirstQualifierFoundInScope;
2959 /// \brief The member to which this member expression refers, which
2960 /// can be name, overloaded operator, or destructor.
2962 /// FIXME: could also be a template-id
2963 DeclarationNameInfo MemberNameInfo;
2965 /// \brief Return the optional template keyword and arguments info.
2966 ASTTemplateKWAndArgsInfo *getTemplateKWAndArgsInfo() {
2967 if (!HasTemplateKWAndArgsInfo) return nullptr;
2968 return reinterpret_cast<ASTTemplateKWAndArgsInfo*>(this + 1);
2970 /// \brief Return the optional template keyword and arguments info.
2971 const ASTTemplateKWAndArgsInfo *getTemplateKWAndArgsInfo() const {
2972 return const_cast<CXXDependentScopeMemberExpr*>(this)
2973 ->getTemplateKWAndArgsInfo();
2976 CXXDependentScopeMemberExpr(const ASTContext &C, Expr *Base,
2977 QualType BaseType, bool IsArrow,
2978 SourceLocation OperatorLoc,
2979 NestedNameSpecifierLoc QualifierLoc,
2980 SourceLocation TemplateKWLoc,
2981 NamedDecl *FirstQualifierFoundInScope,
2982 DeclarationNameInfo MemberNameInfo,
2983 const TemplateArgumentListInfo *TemplateArgs);
2986 CXXDependentScopeMemberExpr(const ASTContext &C, Expr *Base,
2987 QualType BaseType, bool IsArrow,
2988 SourceLocation OperatorLoc,
2989 NestedNameSpecifierLoc QualifierLoc,
2990 NamedDecl *FirstQualifierFoundInScope,
2991 DeclarationNameInfo MemberNameInfo);
2993 static CXXDependentScopeMemberExpr *
2994 Create(const ASTContext &C, Expr *Base, QualType BaseType, bool IsArrow,
2995 SourceLocation OperatorLoc, NestedNameSpecifierLoc QualifierLoc,
2996 SourceLocation TemplateKWLoc, NamedDecl *FirstQualifierFoundInScope,
2997 DeclarationNameInfo MemberNameInfo,
2998 const TemplateArgumentListInfo *TemplateArgs);
3000 static CXXDependentScopeMemberExpr *
3001 CreateEmpty(const ASTContext &C, bool HasTemplateKWAndArgsInfo,
3002 unsigned NumTemplateArgs);
3004 /// \brief True if this is an implicit access, i.e. one in which the
3005 /// member being accessed was not written in the source. The source
3006 /// location of the operator is invalid in this case.
3007 bool isImplicitAccess() const;
3009 /// \brief Retrieve the base object of this member expressions,
3010 /// e.g., the \c x in \c x.m.
3011 Expr *getBase() const {
3012 assert(!isImplicitAccess());
3013 return cast<Expr>(Base);
3016 QualType getBaseType() const { return BaseType; }
3018 /// \brief Determine whether this member expression used the '->'
3019 /// operator; otherwise, it used the '.' operator.
3020 bool isArrow() const { return IsArrow; }
3022 /// \brief Retrieve the location of the '->' or '.' operator.
3023 SourceLocation getOperatorLoc() const { return OperatorLoc; }
3025 /// \brief Retrieve the nested-name-specifier that qualifies the member
3027 NestedNameSpecifier *getQualifier() const {
3028 return QualifierLoc.getNestedNameSpecifier();
3031 /// \brief Retrieve the nested-name-specifier that qualifies the member
3032 /// name, with source location information.
3033 NestedNameSpecifierLoc getQualifierLoc() const { return QualifierLoc; }
3036 /// \brief Retrieve the first part of the nested-name-specifier that was
3037 /// found in the scope of the member access expression when the member access
3038 /// was initially parsed.
3040 /// This function only returns a useful result when member access expression
3041 /// uses a qualified member name, e.g., "x.Base::f". Here, the declaration
3042 /// returned by this function describes what was found by unqualified name
3043 /// lookup for the identifier "Base" within the scope of the member access
3044 /// expression itself. At template instantiation time, this information is
3045 /// combined with the results of name lookup into the type of the object
3046 /// expression itself (the class type of x).
3047 NamedDecl *getFirstQualifierFoundInScope() const {
3048 return FirstQualifierFoundInScope;
3051 /// \brief Retrieve the name of the member that this expression
3053 const DeclarationNameInfo &getMemberNameInfo() const {
3054 return MemberNameInfo;
3057 /// \brief Retrieve the name of the member that this expression
3059 DeclarationName getMember() const { return MemberNameInfo.getName(); }
3061 // \brief Retrieve the location of the name of the member that this
3062 // expression refers to.
3063 SourceLocation getMemberLoc() const { return MemberNameInfo.getLoc(); }
3065 /// \brief Retrieve the location of the template keyword preceding the
3066 /// member name, if any.
3067 SourceLocation getTemplateKeywordLoc() const {
3068 if (!HasTemplateKWAndArgsInfo) return SourceLocation();
3069 return getTemplateKWAndArgsInfo()->getTemplateKeywordLoc();
3072 /// \brief Retrieve the location of the left angle bracket starting the
3073 /// explicit template argument list following the member name, if any.
3074 SourceLocation getLAngleLoc() const {
3075 if (!HasTemplateKWAndArgsInfo) return SourceLocation();
3076 return getTemplateKWAndArgsInfo()->LAngleLoc;
3079 /// \brief Retrieve the location of the right angle bracket ending the
3080 /// explicit template argument list following the member name, if any.
3081 SourceLocation getRAngleLoc() const {
3082 if (!HasTemplateKWAndArgsInfo) return SourceLocation();
3083 return getTemplateKWAndArgsInfo()->RAngleLoc;
3086 /// Determines whether the member name was preceded by the template keyword.
3087 bool hasTemplateKeyword() const { return getTemplateKeywordLoc().isValid(); }
3089 /// \brief Determines whether this member expression actually had a C++
3090 /// template argument list explicitly specified, e.g., x.f<int>.
3091 bool hasExplicitTemplateArgs() const { return getLAngleLoc().isValid(); }
3093 /// \brief Retrieve the explicit template argument list that followed the
3094 /// member template name, if any.
3095 ASTTemplateArgumentListInfo &getExplicitTemplateArgs() {
3096 assert(hasExplicitTemplateArgs());
3097 return *reinterpret_cast<ASTTemplateArgumentListInfo *>(this + 1);
3100 /// \brief Retrieve the explicit template argument list that followed the
3101 /// member template name, if any.
3102 const ASTTemplateArgumentListInfo &getExplicitTemplateArgs() const {
3103 return const_cast<CXXDependentScopeMemberExpr *>(this)
3104 ->getExplicitTemplateArgs();
3107 /// \brief Retrieves the optional explicit template arguments.
3109 /// This points to the same data as getExplicitTemplateArgs(), but
3110 /// returns null if there are no explicit template arguments.
3111 const ASTTemplateArgumentListInfo *getOptionalExplicitTemplateArgs() const {
3112 if (!hasExplicitTemplateArgs()) return nullptr;
3113 return &getExplicitTemplateArgs();
3116 /// \brief Copies the template arguments (if present) into the given
3118 void copyTemplateArgumentsInto(TemplateArgumentListInfo &List) const {
3119 getExplicitTemplateArgs().copyInto(List);
3122 /// \brief Initializes the template arguments using the given structure.
3123 void initializeTemplateArgumentsFrom(const TemplateArgumentListInfo &List) {
3124 getExplicitTemplateArgs().initializeFrom(List);
3127 /// \brief Retrieve the template arguments provided as part of this
3129 const TemplateArgumentLoc *getTemplateArgs() const {
3130 return getExplicitTemplateArgs().getTemplateArgs();
3133 /// \brief Retrieve the number of template arguments provided as part of this
3135 unsigned getNumTemplateArgs() const {
3136 return getExplicitTemplateArgs().NumTemplateArgs;
3139 SourceLocation getLocStart() const LLVM_READONLY {
3140 if (!isImplicitAccess())
3141 return Base->getLocStart();
3143 return getQualifierLoc().getBeginLoc();
3144 return MemberNameInfo.getBeginLoc();
3147 SourceLocation getLocEnd() const LLVM_READONLY {
3148 if (hasExplicitTemplateArgs())
3149 return getRAngleLoc();
3150 return MemberNameInfo.getEndLoc();
3153 static bool classof(const Stmt *T) {
3154 return T->getStmtClass() == CXXDependentScopeMemberExprClass;
3158 child_range children() {
3159 if (isImplicitAccess()) return child_range();
3160 return child_range(&Base, &Base + 1);
3163 friend class ASTStmtReader;
3164 friend class ASTStmtWriter;
3167 /// \brief Represents a C++ member access expression for which lookup
3168 /// produced a set of overloaded functions.
3170 /// The member access may be explicit or implicit:
3174 /// int explicitAccess() { return this->a + this->A::b; }
3175 /// int implicitAccess() { return a + A::b; }
3179 /// In the final AST, an explicit access always becomes a MemberExpr.
3180 /// An implicit access may become either a MemberExpr or a
3181 /// DeclRefExpr, depending on whether the member is static.
3182 class UnresolvedMemberExpr : public OverloadExpr {
3183 /// \brief Whether this member expression used the '->' operator or
3184 /// the '.' operator.
3187 /// \brief Whether the lookup results contain an unresolved using
3189 bool HasUnresolvedUsing : 1;
3191 /// \brief The expression for the base pointer or class reference,
3192 /// e.g., the \c x in x.f.
3194 /// This can be null if this is an 'unbased' member expression.
3197 /// \brief The type of the base expression; never null.
3200 /// \brief The location of the '->' or '.' operator.
3201 SourceLocation OperatorLoc;
3203 UnresolvedMemberExpr(const ASTContext &C, bool HasUnresolvedUsing,
3204 Expr *Base, QualType BaseType, bool IsArrow,
3205 SourceLocation OperatorLoc,
3206 NestedNameSpecifierLoc QualifierLoc,
3207 SourceLocation TemplateKWLoc,
3208 const DeclarationNameInfo &MemberNameInfo,
3209 const TemplateArgumentListInfo *TemplateArgs,
3210 UnresolvedSetIterator Begin, UnresolvedSetIterator End);
3212 UnresolvedMemberExpr(EmptyShell Empty)
3213 : OverloadExpr(UnresolvedMemberExprClass, Empty), IsArrow(false),
3214 HasUnresolvedUsing(false), Base(nullptr) { }
3216 friend class ASTStmtReader;
3219 static UnresolvedMemberExpr *
3220 Create(const ASTContext &C, bool HasUnresolvedUsing,
3221 Expr *Base, QualType BaseType, bool IsArrow,
3222 SourceLocation OperatorLoc,
3223 NestedNameSpecifierLoc QualifierLoc,
3224 SourceLocation TemplateKWLoc,
3225 const DeclarationNameInfo &MemberNameInfo,
3226 const TemplateArgumentListInfo *TemplateArgs,
3227 UnresolvedSetIterator Begin, UnresolvedSetIterator End);
3229 static UnresolvedMemberExpr *
3230 CreateEmpty(const ASTContext &C, bool HasTemplateKWAndArgsInfo,
3231 unsigned NumTemplateArgs);
3233 /// \brief True if this is an implicit access, i.e., one in which the
3234 /// member being accessed was not written in the source.
3236 /// The source location of the operator is invalid in this case.
3237 bool isImplicitAccess() const;
3239 /// \brief Retrieve the base object of this member expressions,
3240 /// e.g., the \c x in \c x.m.
3242 assert(!isImplicitAccess());
3243 return cast<Expr>(Base);
3245 const Expr *getBase() const {
3246 assert(!isImplicitAccess());
3247 return cast<Expr>(Base);
3250 QualType getBaseType() const { return BaseType; }
3252 /// \brief Determine whether the lookup results contain an unresolved using
3254 bool hasUnresolvedUsing() const { return HasUnresolvedUsing; }
3256 /// \brief Determine whether this member expression used the '->'
3257 /// operator; otherwise, it used the '.' operator.
3258 bool isArrow() const { return IsArrow; }
3260 /// \brief Retrieve the location of the '->' or '.' operator.
3261 SourceLocation getOperatorLoc() const { return OperatorLoc; }
3263 /// \brief Retrieve the naming class of this lookup.
3264 CXXRecordDecl *getNamingClass() const;
3266 /// \brief Retrieve the full name info for the member that this expression
3268 const DeclarationNameInfo &getMemberNameInfo() const { return getNameInfo(); }
3270 /// \brief Retrieve the name of the member that this expression
3272 DeclarationName getMemberName() const { return getName(); }
3274 // \brief Retrieve the location of the name of the member that this
3275 // expression refers to.
3276 SourceLocation getMemberLoc() const { return getNameLoc(); }
3278 // \brief Return the preferred location (the member name) for the arrow when
3279 // diagnosing a problem with this expression.
3280 SourceLocation getExprLoc() const LLVM_READONLY { return getMemberLoc(); }
3282 SourceLocation getLocStart() const LLVM_READONLY {
3283 if (!isImplicitAccess())
3284 return Base->getLocStart();
3285 if (NestedNameSpecifierLoc l = getQualifierLoc())
3286 return l.getBeginLoc();
3287 return getMemberNameInfo().getLocStart();
3289 SourceLocation getLocEnd() const LLVM_READONLY {
3290 if (hasExplicitTemplateArgs())
3291 return getRAngleLoc();
3292 return getMemberNameInfo().getLocEnd();
3295 static bool classof(const Stmt *T) {
3296 return T->getStmtClass() == UnresolvedMemberExprClass;
3300 child_range children() {
3301 if (isImplicitAccess()) return child_range();
3302 return child_range(&Base, &Base + 1);
3306 /// \brief Represents a C++11 noexcept expression (C++ [expr.unary.noexcept]).
3308 /// The noexcept expression tests whether a given expression might throw. Its
3309 /// result is a boolean constant.
3310 class CXXNoexceptExpr : public Expr {
3315 friend class ASTStmtReader;
3318 CXXNoexceptExpr(QualType Ty, Expr *Operand, CanThrowResult Val,
3319 SourceLocation Keyword, SourceLocation RParen)
3320 : Expr(CXXNoexceptExprClass, Ty, VK_RValue, OK_Ordinary,
3321 /*TypeDependent*/false,
3322 /*ValueDependent*/Val == CT_Dependent,
3323 Val == CT_Dependent || Operand->isInstantiationDependent(),
3324 Operand->containsUnexpandedParameterPack()),
3325 Value(Val == CT_Cannot), Operand(Operand), Range(Keyword, RParen)
3328 CXXNoexceptExpr(EmptyShell Empty)
3329 : Expr(CXXNoexceptExprClass, Empty)
3332 Expr *getOperand() const { return static_cast<Expr*>(Operand); }
3334 SourceLocation getLocStart() const LLVM_READONLY { return Range.getBegin(); }
3335 SourceLocation getLocEnd() const LLVM_READONLY { return Range.getEnd(); }
3336 SourceRange getSourceRange() const LLVM_READONLY { return Range; }
3338 bool getValue() const { return Value; }
3340 static bool classof(const Stmt *T) {
3341 return T->getStmtClass() == CXXNoexceptExprClass;
3345 child_range children() { return child_range(&Operand, &Operand + 1); }
3348 /// \brief Represents a C++11 pack expansion that produces a sequence of
3351 /// A pack expansion expression contains a pattern (which itself is an
3352 /// expression) followed by an ellipsis. For example:
3355 /// template<typename F, typename ...Types>
3356 /// void forward(F f, Types &&...args) {
3357 /// f(static_cast<Types&&>(args)...);
3361 /// Here, the argument to the function object \c f is a pack expansion whose
3362 /// pattern is \c static_cast<Types&&>(args). When the \c forward function
3363 /// template is instantiated, the pack expansion will instantiate to zero or
3364 /// or more function arguments to the function object \c f.
3365 class PackExpansionExpr : public Expr {
3366 SourceLocation EllipsisLoc;
3368 /// \brief The number of expansions that will be produced by this pack
3369 /// expansion expression, if known.
3371 /// When zero, the number of expansions is not known. Otherwise, this value
3372 /// is the number of expansions + 1.
3373 unsigned NumExpansions;
3377 friend class ASTStmtReader;
3378 friend class ASTStmtWriter;
3381 PackExpansionExpr(QualType T, Expr *Pattern, SourceLocation EllipsisLoc,
3382 Optional<unsigned> NumExpansions)
3383 : Expr(PackExpansionExprClass, T, Pattern->getValueKind(),
3384 Pattern->getObjectKind(), /*TypeDependent=*/true,
3385 /*ValueDependent=*/true, /*InstantiationDependent=*/true,
3386 /*ContainsUnexpandedParameterPack=*/false),
3387 EllipsisLoc(EllipsisLoc),
3388 NumExpansions(NumExpansions? *NumExpansions + 1 : 0),
3389 Pattern(Pattern) { }
3391 PackExpansionExpr(EmptyShell Empty) : Expr(PackExpansionExprClass, Empty) { }
3393 /// \brief Retrieve the pattern of the pack expansion.
3394 Expr *getPattern() { return reinterpret_cast<Expr *>(Pattern); }
3396 /// \brief Retrieve the pattern of the pack expansion.
3397 const Expr *getPattern() const { return reinterpret_cast<Expr *>(Pattern); }
3399 /// \brief Retrieve the location of the ellipsis that describes this pack
3401 SourceLocation getEllipsisLoc() const { return EllipsisLoc; }
3403 /// \brief Determine the number of expansions that will be produced when
3404 /// this pack expansion is instantiated, if already known.
3405 Optional<unsigned> getNumExpansions() const {
3407 return NumExpansions - 1;
3412 SourceLocation getLocStart() const LLVM_READONLY {
3413 return Pattern->getLocStart();
3415 SourceLocation getLocEnd() const LLVM_READONLY { return EllipsisLoc; }
3417 static bool classof(const Stmt *T) {
3418 return T->getStmtClass() == PackExpansionExprClass;
3422 child_range children() {
3423 return child_range(&Pattern, &Pattern + 1);
3427 inline ASTTemplateKWAndArgsInfo *OverloadExpr::getTemplateKWAndArgsInfo() {
3428 if (!HasTemplateKWAndArgsInfo) return nullptr;
3429 if (isa<UnresolvedLookupExpr>(this))
3430 return reinterpret_cast<ASTTemplateKWAndArgsInfo*>
3431 (cast<UnresolvedLookupExpr>(this) + 1);
3433 return reinterpret_cast<ASTTemplateKWAndArgsInfo*>
3434 (cast<UnresolvedMemberExpr>(this) + 1);
3437 /// \brief Represents an expression that computes the length of a parameter
3441 /// template<typename ...Types>
3443 /// static const unsigned value = sizeof...(Types);
3446 class SizeOfPackExpr : public Expr {
3447 /// \brief The location of the \c sizeof keyword.
3448 SourceLocation OperatorLoc;
3450 /// \brief The location of the name of the parameter pack.
3451 SourceLocation PackLoc;
3453 /// \brief The location of the closing parenthesis.
3454 SourceLocation RParenLoc;
3456 /// \brief The length of the parameter pack, if known.
3458 /// When this expression is value-dependent, the length of the parameter pack
3459 /// is unknown. When this expression is not value-dependent, the length is
3463 /// \brief The parameter pack itself.
3466 friend class ASTStmtReader;
3467 friend class ASTStmtWriter;
3470 /// \brief Create a value-dependent expression that computes the length of
3471 /// the given parameter pack.
3472 SizeOfPackExpr(QualType SizeType, SourceLocation OperatorLoc, NamedDecl *Pack,
3473 SourceLocation PackLoc, SourceLocation RParenLoc)
3474 : Expr(SizeOfPackExprClass, SizeType, VK_RValue, OK_Ordinary,
3475 /*TypeDependent=*/false, /*ValueDependent=*/true,
3476 /*InstantiationDependent=*/true,
3477 /*ContainsUnexpandedParameterPack=*/false),
3478 OperatorLoc(OperatorLoc), PackLoc(PackLoc), RParenLoc(RParenLoc),
3479 Length(0), Pack(Pack) { }
3481 /// \brief Create an expression that computes the length of
3482 /// the given parameter pack, which is already known.
3483 SizeOfPackExpr(QualType SizeType, SourceLocation OperatorLoc, NamedDecl *Pack,
3484 SourceLocation PackLoc, SourceLocation RParenLoc,
3486 : Expr(SizeOfPackExprClass, SizeType, VK_RValue, OK_Ordinary,
3487 /*TypeDependent=*/false, /*ValueDependent=*/false,
3488 /*InstantiationDependent=*/false,
3489 /*ContainsUnexpandedParameterPack=*/false),
3490 OperatorLoc(OperatorLoc), PackLoc(PackLoc), RParenLoc(RParenLoc),
3491 Length(Length), Pack(Pack) { }
3493 /// \brief Create an empty expression.
3494 SizeOfPackExpr(EmptyShell Empty) : Expr(SizeOfPackExprClass, Empty) { }
3496 /// \brief Determine the location of the 'sizeof' keyword.
3497 SourceLocation getOperatorLoc() const { return OperatorLoc; }
3499 /// \brief Determine the location of the parameter pack.
3500 SourceLocation getPackLoc() const { return PackLoc; }
3502 /// \brief Determine the location of the right parenthesis.
3503 SourceLocation getRParenLoc() const { return RParenLoc; }
3505 /// \brief Retrieve the parameter pack.
3506 NamedDecl *getPack() const { return Pack; }
3508 /// \brief Retrieve the length of the parameter pack.
3510 /// This routine may only be invoked when the expression is not
3511 /// value-dependent.
3512 unsigned getPackLength() const {
3513 assert(!isValueDependent() &&
3514 "Cannot get the length of a value-dependent pack size expression");
3518 SourceLocation getLocStart() const LLVM_READONLY { return OperatorLoc; }
3519 SourceLocation getLocEnd() const LLVM_READONLY { return RParenLoc; }
3521 static bool classof(const Stmt *T) {
3522 return T->getStmtClass() == SizeOfPackExprClass;
3526 child_range children() { return child_range(); }
3529 /// \brief Represents a reference to a non-type template parameter
3530 /// that has been substituted with a template argument.
3531 class SubstNonTypeTemplateParmExpr : public Expr {
3532 /// \brief The replaced parameter.
3533 NonTypeTemplateParmDecl *Param;
3535 /// \brief The replacement expression.
3538 /// \brief The location of the non-type template parameter reference.
3539 SourceLocation NameLoc;
3541 friend class ASTReader;
3542 friend class ASTStmtReader;
3543 explicit SubstNonTypeTemplateParmExpr(EmptyShell Empty)
3544 : Expr(SubstNonTypeTemplateParmExprClass, Empty) { }
3547 SubstNonTypeTemplateParmExpr(QualType type,
3548 ExprValueKind valueKind,
3550 NonTypeTemplateParmDecl *param,
3552 : Expr(SubstNonTypeTemplateParmExprClass, type, valueKind, OK_Ordinary,
3553 replacement->isTypeDependent(), replacement->isValueDependent(),
3554 replacement->isInstantiationDependent(),
3555 replacement->containsUnexpandedParameterPack()),
3556 Param(param), Replacement(replacement), NameLoc(loc) {}
3558 SourceLocation getNameLoc() const { return NameLoc; }
3559 SourceLocation getLocStart() const LLVM_READONLY { return NameLoc; }
3560 SourceLocation getLocEnd() const LLVM_READONLY { return NameLoc; }
3562 Expr *getReplacement() const { return cast<Expr>(Replacement); }
3564 NonTypeTemplateParmDecl *getParameter() const { return Param; }
3566 static bool classof(const Stmt *s) {
3567 return s->getStmtClass() == SubstNonTypeTemplateParmExprClass;
3571 child_range children() { return child_range(&Replacement, &Replacement+1); }
3574 /// \brief Represents a reference to a non-type template parameter pack that
3575 /// has been substituted with a non-template argument pack.
3577 /// When a pack expansion in the source code contains multiple parameter packs
3578 /// and those parameter packs correspond to different levels of template
3579 /// parameter lists, this node is used to represent a non-type template
3580 /// parameter pack from an outer level, which has already had its argument pack
3581 /// substituted but that still lives within a pack expansion that itself
3582 /// could not be instantiated. When actually performing a substitution into
3583 /// that pack expansion (e.g., when all template parameters have corresponding
3584 /// arguments), this type will be replaced with the appropriate underlying
3585 /// expression at the current pack substitution index.
3586 class SubstNonTypeTemplateParmPackExpr : public Expr {
3587 /// \brief The non-type template parameter pack itself.
3588 NonTypeTemplateParmDecl *Param;
3590 /// \brief A pointer to the set of template arguments that this
3591 /// parameter pack is instantiated with.
3592 const TemplateArgument *Arguments;
3594 /// \brief The number of template arguments in \c Arguments.
3595 unsigned NumArguments;
3597 /// \brief The location of the non-type template parameter pack reference.
3598 SourceLocation NameLoc;
3600 friend class ASTReader;
3601 friend class ASTStmtReader;
3602 explicit SubstNonTypeTemplateParmPackExpr(EmptyShell Empty)
3603 : Expr(SubstNonTypeTemplateParmPackExprClass, Empty) { }
3606 SubstNonTypeTemplateParmPackExpr(QualType T,
3607 NonTypeTemplateParmDecl *Param,
3608 SourceLocation NameLoc,
3609 const TemplateArgument &ArgPack);
3611 /// \brief Retrieve the non-type template parameter pack being substituted.
3612 NonTypeTemplateParmDecl *getParameterPack() const { return Param; }
3614 /// \brief Retrieve the location of the parameter pack name.
3615 SourceLocation getParameterPackLocation() const { return NameLoc; }
3617 /// \brief Retrieve the template argument pack containing the substituted
3618 /// template arguments.
3619 TemplateArgument getArgumentPack() const;
3621 SourceLocation getLocStart() const LLVM_READONLY { return NameLoc; }
3622 SourceLocation getLocEnd() const LLVM_READONLY { return NameLoc; }
3624 static bool classof(const Stmt *T) {
3625 return T->getStmtClass() == SubstNonTypeTemplateParmPackExprClass;
3629 child_range children() { return child_range(); }
3632 /// \brief Represents a reference to a function parameter pack that has been
3633 /// substituted but not yet expanded.
3635 /// When a pack expansion contains multiple parameter packs at different levels,
3636 /// this node is used to represent a function parameter pack at an outer level
3637 /// which we have already substituted to refer to expanded parameters, but where
3638 /// the containing pack expansion cannot yet be expanded.
3641 /// template<typename...Ts> struct S {
3642 /// template<typename...Us> auto f(Ts ...ts) -> decltype(g(Us(ts)...));
3644 /// template struct S<int, int>;
3646 class FunctionParmPackExpr : public Expr {
3647 /// \brief The function parameter pack which was referenced.
3648 ParmVarDecl *ParamPack;
3650 /// \brief The location of the function parameter pack reference.
3651 SourceLocation NameLoc;
3653 /// \brief The number of expansions of this pack.
3654 unsigned NumParameters;
3656 FunctionParmPackExpr(QualType T, ParmVarDecl *ParamPack,
3657 SourceLocation NameLoc, unsigned NumParams,
3658 Decl * const *Params);
3660 friend class ASTReader;
3661 friend class ASTStmtReader;
3664 static FunctionParmPackExpr *Create(const ASTContext &Context, QualType T,
3665 ParmVarDecl *ParamPack,
3666 SourceLocation NameLoc,
3667 ArrayRef<Decl *> Params);
3668 static FunctionParmPackExpr *CreateEmpty(const ASTContext &Context,
3669 unsigned NumParams);
3671 /// \brief Get the parameter pack which this expression refers to.
3672 ParmVarDecl *getParameterPack() const { return ParamPack; }
3674 /// \brief Get the location of the parameter pack.
3675 SourceLocation getParameterPackLocation() const { return NameLoc; }
3677 /// \brief Iterators over the parameters which the parameter pack expanded
3679 typedef ParmVarDecl * const *iterator;
3680 iterator begin() const { return reinterpret_cast<iterator>(this+1); }
3681 iterator end() const { return begin() + NumParameters; }
3683 /// \brief Get the number of parameters in this parameter pack.
3684 unsigned getNumExpansions() const { return NumParameters; }
3686 /// \brief Get an expansion of the parameter pack by index.
3687 ParmVarDecl *getExpansion(unsigned I) const { return begin()[I]; }
3689 SourceLocation getLocStart() const LLVM_READONLY { return NameLoc; }
3690 SourceLocation getLocEnd() const LLVM_READONLY { return NameLoc; }
3692 static bool classof(const Stmt *T) {
3693 return T->getStmtClass() == FunctionParmPackExprClass;
3696 child_range children() { return child_range(); }
3699 /// \brief Represents a prvalue temporary that is written into memory so that
3700 /// a reference can bind to it.
3702 /// Prvalue expressions are materialized when they need to have an address
3703 /// in memory for a reference to bind to. This happens when binding a
3704 /// reference to the result of a conversion, e.g.,
3707 /// const int &r = 1.0;
3710 /// Here, 1.0 is implicitly converted to an \c int. That resulting \c int is
3711 /// then materialized via a \c MaterializeTemporaryExpr, and the reference
3712 /// binds to the temporary. \c MaterializeTemporaryExprs are always glvalues
3713 /// (either an lvalue or an xvalue, depending on the kind of reference binding
3714 /// to it), maintaining the invariant that references always bind to glvalues.
3716 /// Reference binding and copy-elision can both extend the lifetime of a
3717 /// temporary. When either happens, the expression will also track the
3718 /// declaration which is responsible for the lifetime extension.
3719 class MaterializeTemporaryExpr : public Expr {
3722 /// \brief The temporary-generating expression whose value will be
3726 /// \brief The declaration which lifetime-extended this reference, if any.
3727 /// Either a VarDecl, or (for a ctor-initializer) a FieldDecl.
3728 const ValueDecl *ExtendingDecl;
3730 unsigned ManglingNumber;
3732 llvm::PointerUnion<Stmt *, ExtraState *> State;
3734 friend class ASTStmtReader;
3735 friend class ASTStmtWriter;
3737 void initializeExtraState(const ValueDecl *ExtendedBy,
3738 unsigned ManglingNumber);
3741 MaterializeTemporaryExpr(QualType T, Expr *Temporary,
3742 bool BoundToLvalueReference)
3743 : Expr(MaterializeTemporaryExprClass, T,
3744 BoundToLvalueReference? VK_LValue : VK_XValue, OK_Ordinary,
3745 Temporary->isTypeDependent(), Temporary->isValueDependent(),
3746 Temporary->isInstantiationDependent(),
3747 Temporary->containsUnexpandedParameterPack()),
3750 MaterializeTemporaryExpr(EmptyShell Empty)
3751 : Expr(MaterializeTemporaryExprClass, Empty) { }
3753 Stmt *getTemporary() const {
3754 return State.is<Stmt *>() ? State.get<Stmt *>()
3755 : State.get<ExtraState *>()->Temporary;
3758 /// \brief Retrieve the temporary-generating subexpression whose value will
3759 /// be materialized into a glvalue.
3760 Expr *GetTemporaryExpr() const { return static_cast<Expr *>(getTemporary()); }
3762 /// \brief Retrieve the storage duration for the materialized temporary.
3763 StorageDuration getStorageDuration() const {
3764 const ValueDecl *ExtendingDecl = getExtendingDecl();
3766 return SD_FullExpression;
3767 // FIXME: This is not necessarily correct for a temporary materialized
3768 // within a default initializer.
3769 if (isa<FieldDecl>(ExtendingDecl))
3770 return SD_Automatic;
3771 return cast<VarDecl>(ExtendingDecl)->getStorageDuration();
3774 /// \brief Get the declaration which triggered the lifetime-extension of this
3775 /// temporary, if any.
3776 const ValueDecl *getExtendingDecl() const {
3777 return State.is<Stmt *>() ? nullptr
3778 : State.get<ExtraState *>()->ExtendingDecl;
3781 void setExtendingDecl(const ValueDecl *ExtendedBy, unsigned ManglingNumber);
3783 unsigned getManglingNumber() const {
3784 return State.is<Stmt *>() ? 0 : State.get<ExtraState *>()->ManglingNumber;
3787 /// \brief Determine whether this materialized temporary is bound to an
3788 /// lvalue reference; otherwise, it's bound to an rvalue reference.
3789 bool isBoundToLvalueReference() const {
3790 return getValueKind() == VK_LValue;
3793 SourceLocation getLocStart() const LLVM_READONLY {
3794 return getTemporary()->getLocStart();
3796 SourceLocation getLocEnd() const LLVM_READONLY {
3797 return getTemporary()->getLocEnd();
3800 static bool classof(const Stmt *T) {
3801 return T->getStmtClass() == MaterializeTemporaryExprClass;
3805 child_range children() {
3806 if (State.is<Stmt *>())
3807 return child_range(State.getAddrOfPtr1(), State.getAddrOfPtr1() + 1);
3809 auto ES = State.get<ExtraState *>();
3810 return child_range(&ES->Temporary, &ES->Temporary + 1);
3814 } // end namespace clang