1 //===--- DeclSpec.h - Parsed declaration specifiers -------------*- 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 /// This file defines the classes used to store parsed information about
12 /// declaration-specifiers and declarators.
15 /// static const int volatile x, *y, *(*(*z)[10])(const void *x);
16 /// ------------------------- - -- ---------------------------
17 /// declaration-specifiers \ | /
21 //===----------------------------------------------------------------------===//
23 #ifndef LLVM_CLANG_SEMA_DECLSPEC_H
24 #define LLVM_CLANG_SEMA_DECLSPEC_H
26 #include "clang/AST/NestedNameSpecifier.h"
27 #include "clang/Basic/ExceptionSpecificationType.h"
28 #include "clang/Basic/Lambda.h"
29 #include "clang/Basic/OperatorKinds.h"
30 #include "clang/Basic/Specifiers.h"
31 #include "clang/Lex/Token.h"
32 #include "clang/Sema/Ownership.h"
33 #include "clang/Sema/ParsedAttr.h"
34 #include "llvm/ADT/SmallVector.h"
35 #include "llvm/Support/Compiler.h"
36 #include "llvm/Support/ErrorHandling.h"
44 class NamespaceAliasDecl;
49 struct TemplateIdAnnotation;
51 /// Represents a C++ nested-name-specifier or a global scope specifier.
53 /// These can be in 3 states:
54 /// 1) Not present, identified by isEmpty()
55 /// 2) Present, identified by isNotEmpty()
56 /// 2.a) Valid, identified by isValid()
57 /// 2.b) Invalid, identified by isInvalid().
59 /// isSet() is deprecated because it mostly corresponded to "valid" but was
60 /// often used as if it meant "present".
62 /// The actual scope is described by getScopeRep().
65 NestedNameSpecifierLocBuilder Builder;
68 SourceRange getRange() const { return Range; }
69 void setRange(SourceRange R) { Range = R; }
70 void setBeginLoc(SourceLocation Loc) { Range.setBegin(Loc); }
71 void setEndLoc(SourceLocation Loc) { Range.setEnd(Loc); }
72 SourceLocation getBeginLoc() const { return Range.getBegin(); }
73 SourceLocation getEndLoc() const { return Range.getEnd(); }
75 /// Retrieve the representation of the nested-name-specifier.
76 NestedNameSpecifier *getScopeRep() const {
77 return Builder.getRepresentation();
80 /// Extend the current nested-name-specifier by another
81 /// nested-name-specifier component of the form 'type::'.
83 /// \param Context The AST context in which this nested-name-specifier
86 /// \param TemplateKWLoc The location of the 'template' keyword, if present.
88 /// \param TL The TypeLoc that describes the type preceding the '::'.
90 /// \param ColonColonLoc The location of the trailing '::'.
91 void Extend(ASTContext &Context, SourceLocation TemplateKWLoc, TypeLoc TL,
92 SourceLocation ColonColonLoc);
94 /// Extend the current nested-name-specifier by another
95 /// nested-name-specifier component of the form 'identifier::'.
97 /// \param Context The AST context in which this nested-name-specifier
100 /// \param Identifier The identifier.
102 /// \param IdentifierLoc The location of the identifier.
104 /// \param ColonColonLoc The location of the trailing '::'.
105 void Extend(ASTContext &Context, IdentifierInfo *Identifier,
106 SourceLocation IdentifierLoc, SourceLocation ColonColonLoc);
108 /// Extend the current nested-name-specifier by another
109 /// nested-name-specifier component of the form 'namespace::'.
111 /// \param Context The AST context in which this nested-name-specifier
114 /// \param Namespace The namespace.
116 /// \param NamespaceLoc The location of the namespace name.
118 /// \param ColonColonLoc The location of the trailing '::'.
119 void Extend(ASTContext &Context, NamespaceDecl *Namespace,
120 SourceLocation NamespaceLoc, SourceLocation ColonColonLoc);
122 /// Extend the current nested-name-specifier by another
123 /// nested-name-specifier component of the form 'namespace-alias::'.
125 /// \param Context The AST context in which this nested-name-specifier
128 /// \param Alias The namespace alias.
130 /// \param AliasLoc The location of the namespace alias
133 /// \param ColonColonLoc The location of the trailing '::'.
134 void Extend(ASTContext &Context, NamespaceAliasDecl *Alias,
135 SourceLocation AliasLoc, SourceLocation ColonColonLoc);
137 /// Turn this (empty) nested-name-specifier into the global
138 /// nested-name-specifier '::'.
139 void MakeGlobal(ASTContext &Context, SourceLocation ColonColonLoc);
141 /// Turns this (empty) nested-name-specifier into '__super'
142 /// nested-name-specifier.
144 /// \param Context The AST context in which this nested-name-specifier
147 /// \param RD The declaration of the class in which nested-name-specifier
150 /// \param SuperLoc The location of the '__super' keyword.
153 /// \param ColonColonLoc The location of the trailing '::'.
154 void MakeSuper(ASTContext &Context, CXXRecordDecl *RD,
155 SourceLocation SuperLoc, SourceLocation ColonColonLoc);
157 /// Make a new nested-name-specifier from incomplete source-location
160 /// FIXME: This routine should be used very, very rarely, in cases where we
161 /// need to synthesize a nested-name-specifier. Most code should instead use
162 /// \c Adopt() with a proper \c NestedNameSpecifierLoc.
163 void MakeTrivial(ASTContext &Context, NestedNameSpecifier *Qualifier,
166 /// Adopt an existing nested-name-specifier (with source-range
168 void Adopt(NestedNameSpecifierLoc Other);
170 /// Retrieve a nested-name-specifier with location information, copied
171 /// into the given AST context.
173 /// \param Context The context into which this nested-name-specifier will be
175 NestedNameSpecifierLoc getWithLocInContext(ASTContext &Context) const;
177 /// Retrieve the location of the name in the last qualifier
178 /// in this nested name specifier.
180 /// For example, the location of \c bar
186 SourceLocation getLastQualifierNameLoc() const;
188 /// No scope specifier.
189 bool isEmpty() const { return !Range.isValid(); }
190 /// A scope specifier is present, but may be valid or invalid.
191 bool isNotEmpty() const { return !isEmpty(); }
193 /// An error occurred during parsing of the scope specifier.
194 bool isInvalid() const { return isNotEmpty() && getScopeRep() == nullptr; }
195 /// A scope specifier is present, and it refers to a real scope.
196 bool isValid() const { return isNotEmpty() && getScopeRep() != nullptr; }
198 /// Indicate that this nested-name-specifier is invalid.
199 void SetInvalid(SourceRange R) {
200 assert(R.isValid() && "Must have a valid source range");
201 if (Range.getBegin().isInvalid())
202 Range.setBegin(R.getBegin());
203 Range.setEnd(R.getEnd());
207 /// Deprecated. Some call sites intend isNotEmpty() while others intend
209 bool isSet() const { return getScopeRep() != nullptr; }
212 Range = SourceRange();
216 /// Retrieve the data associated with the source-location information.
217 char *location_data() const { return Builder.getBuffer().first; }
219 /// Retrieve the size of the data associated with source-location
221 unsigned location_size() const { return Builder.getBuffer().second; }
224 /// Captures information about "declaration specifiers".
226 /// "Declaration specifiers" encompasses storage-class-specifiers,
227 /// type-specifiers, type-qualifiers, and function-specifiers.
230 /// storage-class-specifier
231 /// \note The order of these enumerators is important for diagnostics.
243 // Import thread storage class specifier enumeration and constants.
244 // These can be combined with SCS_extern and SCS_static.
245 typedef ThreadStorageClassSpecifier TSCS;
246 static const TSCS TSCS_unspecified = clang::TSCS_unspecified;
247 static const TSCS TSCS___thread = clang::TSCS___thread;
248 static const TSCS TSCS_thread_local = clang::TSCS_thread_local;
249 static const TSCS TSCS__Thread_local = clang::TSCS__Thread_local;
251 // Import type specifier width enumeration and constants.
252 typedef TypeSpecifierWidth TSW;
253 static const TSW TSW_unspecified = clang::TSW_unspecified;
254 static const TSW TSW_short = clang::TSW_short;
255 static const TSW TSW_long = clang::TSW_long;
256 static const TSW TSW_longlong = clang::TSW_longlong;
264 // Import type specifier sign enumeration and constants.
265 typedef TypeSpecifierSign TSS;
266 static const TSS TSS_unspecified = clang::TSS_unspecified;
267 static const TSS TSS_signed = clang::TSS_signed;
268 static const TSS TSS_unsigned = clang::TSS_unsigned;
270 // Import type specifier type enumeration and constants.
271 typedef TypeSpecifierType TST;
272 static const TST TST_unspecified = clang::TST_unspecified;
273 static const TST TST_void = clang::TST_void;
274 static const TST TST_char = clang::TST_char;
275 static const TST TST_wchar = clang::TST_wchar;
276 static const TST TST_char8 = clang::TST_char8;
277 static const TST TST_char16 = clang::TST_char16;
278 static const TST TST_char32 = clang::TST_char32;
279 static const TST TST_int = clang::TST_int;
280 static const TST TST_int128 = clang::TST_int128;
281 static const TST TST_half = clang::TST_half;
282 static const TST TST_float = clang::TST_float;
283 static const TST TST_double = clang::TST_double;
284 static const TST TST_float16 = clang::TST_Float16;
285 static const TST TST_accum = clang::TST_Accum;
286 static const TST TST_fract = clang::TST_Fract;
287 static const TST TST_float128 = clang::TST_float128;
288 static const TST TST_bool = clang::TST_bool;
289 static const TST TST_decimal32 = clang::TST_decimal32;
290 static const TST TST_decimal64 = clang::TST_decimal64;
291 static const TST TST_decimal128 = clang::TST_decimal128;
292 static const TST TST_enum = clang::TST_enum;
293 static const TST TST_union = clang::TST_union;
294 static const TST TST_struct = clang::TST_struct;
295 static const TST TST_interface = clang::TST_interface;
296 static const TST TST_class = clang::TST_class;
297 static const TST TST_typename = clang::TST_typename;
298 static const TST TST_typeofType = clang::TST_typeofType;
299 static const TST TST_typeofExpr = clang::TST_typeofExpr;
300 static const TST TST_decltype = clang::TST_decltype;
301 static const TST TST_decltype_auto = clang::TST_decltype_auto;
302 static const TST TST_underlyingType = clang::TST_underlyingType;
303 static const TST TST_auto = clang::TST_auto;
304 static const TST TST_auto_type = clang::TST_auto_type;
305 static const TST TST_unknown_anytype = clang::TST_unknown_anytype;
306 static const TST TST_atomic = clang::TST_atomic;
307 #define GENERIC_IMAGE_TYPE(ImgType, Id) \
308 static const TST TST_##ImgType##_t = clang::TST_##ImgType##_t;
309 #include "clang/Basic/OpenCLImageTypes.def"
310 static const TST TST_error = clang::TST_error;
313 enum TQ { // NOTE: These flags must be kept in sync with Qualifiers::TQ.
319 // This has no corresponding Qualifiers::TQ value, because it's not treated
320 // as a qualifier in our type system.
324 /// ParsedSpecifiers - Flags to query which specifiers were applied. This is
325 /// returned by getParsedSpecifiers.
326 enum ParsedSpecifiers {
328 PQ_StorageClassSpecifier = 1,
329 PQ_TypeSpecifier = 2,
330 PQ_TypeQualifier = 4,
331 PQ_FunctionSpecifier = 8
332 // FIXME: Attributes should be included here.
336 // storage-class-specifier
337 /*SCS*/unsigned StorageClassSpec : 3;
338 /*TSCS*/unsigned ThreadStorageClassSpec : 2;
339 unsigned SCS_extern_in_linkage_spec : 1;
342 /*TSW*/unsigned TypeSpecWidth : 2;
343 /*TSC*/unsigned TypeSpecComplex : 2;
344 /*TSS*/unsigned TypeSpecSign : 2;
345 /*TST*/unsigned TypeSpecType : 6;
346 unsigned TypeAltiVecVector : 1;
347 unsigned TypeAltiVecPixel : 1;
348 unsigned TypeAltiVecBool : 1;
349 unsigned TypeSpecOwned : 1;
350 unsigned TypeSpecPipe : 1;
351 unsigned TypeSpecSat : 1;
354 unsigned TypeQualifiers : 5; // Bitwise OR of TQ.
356 // function-specifier
357 unsigned FS_inline_specified : 1;
358 unsigned FS_forceinline_specified: 1;
359 unsigned FS_virtual_specified : 1;
360 unsigned FS_explicit_specified : 1;
361 unsigned FS_noreturn_specified : 1;
364 unsigned Friend_specified : 1;
366 // constexpr-specifier
367 unsigned Constexpr_specified : 1;
370 UnionParsedType TypeRep;
376 ParsedAttributes Attrs;
378 // Scope specifier for the type spec, if applicable.
379 CXXScopeSpec TypeScope;
381 // SourceLocation info. These are null if the item wasn't specified or if
382 // the setting was synthesized.
385 SourceLocation StorageClassSpecLoc, ThreadStorageClassSpecLoc;
386 SourceRange TSWRange;
387 SourceLocation TSCLoc, TSSLoc, TSTLoc, AltiVecLoc, TSSatLoc;
388 /// TSTNameLoc - If TypeSpecType is any of class, enum, struct, union,
389 /// typename, then this is the location of the named type (if present);
390 /// otherwise, it is the same as TSTLoc. Hence, the pair TSTLoc and
391 /// TSTNameLoc provides source range info for tag types.
392 SourceLocation TSTNameLoc;
393 SourceRange TypeofParensRange;
394 SourceLocation TQ_constLoc, TQ_restrictLoc, TQ_volatileLoc, TQ_atomicLoc,
396 SourceLocation FS_inlineLoc, FS_virtualLoc, FS_explicitLoc, FS_noreturnLoc;
397 SourceLocation FS_forceinlineLoc;
398 SourceLocation FriendLoc, ModulePrivateLoc, ConstexprLoc;
399 SourceLocation TQ_pipeLoc;
401 WrittenBuiltinSpecs writtenBS;
402 void SaveWrittenBuiltinSpecs();
404 ObjCDeclSpec *ObjCQualifiers;
406 static bool isTypeRep(TST T) {
407 return (T == TST_typename || T == TST_typeofType ||
408 T == TST_underlyingType || T == TST_atomic);
410 static bool isExprRep(TST T) {
411 return (T == TST_typeofExpr || T == TST_decltype);
414 DeclSpec(const DeclSpec &) = delete;
415 void operator=(const DeclSpec &) = delete;
417 static bool isDeclRep(TST T) {
418 return (T == TST_enum || T == TST_struct ||
419 T == TST_interface || T == TST_union ||
423 DeclSpec(AttributeFactory &attrFactory)
424 : StorageClassSpec(SCS_unspecified),
425 ThreadStorageClassSpec(TSCS_unspecified),
426 SCS_extern_in_linkage_spec(false),
427 TypeSpecWidth(TSW_unspecified),
428 TypeSpecComplex(TSC_unspecified),
429 TypeSpecSign(TSS_unspecified),
430 TypeSpecType(TST_unspecified),
431 TypeAltiVecVector(false),
432 TypeAltiVecPixel(false),
433 TypeAltiVecBool(false),
434 TypeSpecOwned(false),
437 TypeQualifiers(TQ_unspecified),
438 FS_inline_specified(false),
439 FS_forceinline_specified(false),
440 FS_virtual_specified(false),
441 FS_explicit_specified(false),
442 FS_noreturn_specified(false),
443 Friend_specified(false),
444 Constexpr_specified(false),
447 ObjCQualifiers(nullptr) {
450 // storage-class-specifier
451 SCS getStorageClassSpec() const { return (SCS)StorageClassSpec; }
452 TSCS getThreadStorageClassSpec() const {
453 return (TSCS)ThreadStorageClassSpec;
455 bool isExternInLinkageSpec() const { return SCS_extern_in_linkage_spec; }
456 void setExternInLinkageSpec(bool Value) {
457 SCS_extern_in_linkage_spec = Value;
460 SourceLocation getStorageClassSpecLoc() const { return StorageClassSpecLoc; }
461 SourceLocation getThreadStorageClassSpecLoc() const {
462 return ThreadStorageClassSpecLoc;
465 void ClearStorageClassSpecs() {
466 StorageClassSpec = DeclSpec::SCS_unspecified;
467 ThreadStorageClassSpec = DeclSpec::TSCS_unspecified;
468 SCS_extern_in_linkage_spec = false;
469 StorageClassSpecLoc = SourceLocation();
470 ThreadStorageClassSpecLoc = SourceLocation();
473 void ClearTypeSpecType() {
474 TypeSpecType = DeclSpec::TST_unspecified;
475 TypeSpecOwned = false;
476 TSTLoc = SourceLocation();
480 TSW getTypeSpecWidth() const { return (TSW)TypeSpecWidth; }
481 TSC getTypeSpecComplex() const { return (TSC)TypeSpecComplex; }
482 TSS getTypeSpecSign() const { return (TSS)TypeSpecSign; }
483 TST getTypeSpecType() const { return (TST)TypeSpecType; }
484 bool isTypeAltiVecVector() const { return TypeAltiVecVector; }
485 bool isTypeAltiVecPixel() const { return TypeAltiVecPixel; }
486 bool isTypeAltiVecBool() const { return TypeAltiVecBool; }
487 bool isTypeSpecOwned() const { return TypeSpecOwned; }
488 bool isTypeRep() const { return isTypeRep((TST) TypeSpecType); }
489 bool isTypeSpecPipe() const { return TypeSpecPipe; }
490 bool isTypeSpecSat() const { return TypeSpecSat; }
492 ParsedType getRepAsType() const {
493 assert(isTypeRep((TST) TypeSpecType) && "DeclSpec does not store a type");
496 Decl *getRepAsDecl() const {
497 assert(isDeclRep((TST) TypeSpecType) && "DeclSpec does not store a decl");
500 Expr *getRepAsExpr() const {
501 assert(isExprRep((TST) TypeSpecType) && "DeclSpec does not store an expr");
504 CXXScopeSpec &getTypeSpecScope() { return TypeScope; }
505 const CXXScopeSpec &getTypeSpecScope() const { return TypeScope; }
507 SourceRange getSourceRange() const LLVM_READONLY { return Range; }
508 SourceLocation getBeginLoc() const LLVM_READONLY { return Range.getBegin(); }
509 SourceLocation getEndLoc() const LLVM_READONLY { return Range.getEnd(); }
511 SourceLocation getTypeSpecWidthLoc() const { return TSWRange.getBegin(); }
512 SourceRange getTypeSpecWidthRange() const { return TSWRange; }
513 SourceLocation getTypeSpecComplexLoc() const { return TSCLoc; }
514 SourceLocation getTypeSpecSignLoc() const { return TSSLoc; }
515 SourceLocation getTypeSpecTypeLoc() const { return TSTLoc; }
516 SourceLocation getAltiVecLoc() const { return AltiVecLoc; }
517 SourceLocation getTypeSpecSatLoc() const { return TSSatLoc; }
519 SourceLocation getTypeSpecTypeNameLoc() const {
520 assert(isDeclRep((TST) TypeSpecType) || TypeSpecType == TST_typename);
524 SourceRange getTypeofParensRange() const { return TypeofParensRange; }
525 void setTypeofParensRange(SourceRange range) { TypeofParensRange = range; }
527 bool hasAutoTypeSpec() const {
528 return (TypeSpecType == TST_auto || TypeSpecType == TST_auto_type ||
529 TypeSpecType == TST_decltype_auto);
532 bool hasTagDefinition() const;
534 /// Turn a type-specifier-type into a string like "_Bool" or "union".
535 static const char *getSpecifierName(DeclSpec::TST T,
536 const PrintingPolicy &Policy);
537 static const char *getSpecifierName(DeclSpec::TQ Q);
538 static const char *getSpecifierName(DeclSpec::TSS S);
539 static const char *getSpecifierName(DeclSpec::TSC C);
540 static const char *getSpecifierName(DeclSpec::TSW W);
541 static const char *getSpecifierName(DeclSpec::SCS S);
542 static const char *getSpecifierName(DeclSpec::TSCS S);
546 /// getTypeQualifiers - Return a set of TQs.
547 unsigned getTypeQualifiers() const { return TypeQualifiers; }
548 SourceLocation getConstSpecLoc() const { return TQ_constLoc; }
549 SourceLocation getRestrictSpecLoc() const { return TQ_restrictLoc; }
550 SourceLocation getVolatileSpecLoc() const { return TQ_volatileLoc; }
551 SourceLocation getAtomicSpecLoc() const { return TQ_atomicLoc; }
552 SourceLocation getUnalignedSpecLoc() const { return TQ_unalignedLoc; }
553 SourceLocation getPipeLoc() const { return TQ_pipeLoc; }
555 /// Clear out all of the type qualifiers.
556 void ClearTypeQualifiers() {
558 TQ_constLoc = SourceLocation();
559 TQ_restrictLoc = SourceLocation();
560 TQ_volatileLoc = SourceLocation();
561 TQ_atomicLoc = SourceLocation();
562 TQ_unalignedLoc = SourceLocation();
563 TQ_pipeLoc = SourceLocation();
566 // function-specifier
567 bool isInlineSpecified() const {
568 return FS_inline_specified | FS_forceinline_specified;
570 SourceLocation getInlineSpecLoc() const {
571 return FS_inline_specified ? FS_inlineLoc : FS_forceinlineLoc;
574 bool isVirtualSpecified() const { return FS_virtual_specified; }
575 SourceLocation getVirtualSpecLoc() const { return FS_virtualLoc; }
577 bool isExplicitSpecified() const { return FS_explicit_specified; }
578 SourceLocation getExplicitSpecLoc() const { return FS_explicitLoc; }
580 bool isNoreturnSpecified() const { return FS_noreturn_specified; }
581 SourceLocation getNoreturnSpecLoc() const { return FS_noreturnLoc; }
583 void ClearFunctionSpecs() {
584 FS_inline_specified = false;
585 FS_inlineLoc = SourceLocation();
586 FS_forceinline_specified = false;
587 FS_forceinlineLoc = SourceLocation();
588 FS_virtual_specified = false;
589 FS_virtualLoc = SourceLocation();
590 FS_explicit_specified = false;
591 FS_explicitLoc = SourceLocation();
592 FS_noreturn_specified = false;
593 FS_noreturnLoc = SourceLocation();
596 /// This method calls the passed in handler on each CVRU qual being
598 /// Handle - a handler to be invoked.
599 void forEachCVRUQualifier(
600 llvm::function_ref<void(TQ, StringRef, SourceLocation)> Handle);
602 /// This method calls the passed in handler on each qual being
604 /// Handle - a handler to be invoked.
605 void forEachQualifier(
606 llvm::function_ref<void(TQ, StringRef, SourceLocation)> Handle);
608 /// Return true if any type-specifier has been found.
609 bool hasTypeSpecifier() const {
610 return getTypeSpecType() != DeclSpec::TST_unspecified ||
611 getTypeSpecWidth() != DeclSpec::TSW_unspecified ||
612 getTypeSpecComplex() != DeclSpec::TSC_unspecified ||
613 getTypeSpecSign() != DeclSpec::TSS_unspecified;
616 /// Return a bitmask of which flavors of specifiers this
617 /// DeclSpec includes.
618 unsigned getParsedSpecifiers() const;
620 /// isEmpty - Return true if this declaration specifier is completely empty:
621 /// no tokens were parsed in the production of it.
622 bool isEmpty() const {
623 return getParsedSpecifiers() == DeclSpec::PQ_None;
626 void SetRangeStart(SourceLocation Loc) { Range.setBegin(Loc); }
627 void SetRangeEnd(SourceLocation Loc) { Range.setEnd(Loc); }
629 /// These methods set the specified attribute of the DeclSpec and
630 /// return false if there was no error. If an error occurs (for
631 /// example, if we tried to set "auto" on a spec with "extern"
632 /// already set), they return true and set PrevSpec and DiagID
634 /// Diag(Loc, DiagID) << PrevSpec;
635 /// will yield a useful result.
637 /// TODO: use a more general approach that still allows these
638 /// diagnostics to be ignored when desired.
639 bool SetStorageClassSpec(Sema &S, SCS SC, SourceLocation Loc,
640 const char *&PrevSpec, unsigned &DiagID,
641 const PrintingPolicy &Policy);
642 bool SetStorageClassSpecThread(TSCS TSC, SourceLocation Loc,
643 const char *&PrevSpec, unsigned &DiagID);
644 bool SetTypeSpecWidth(TSW W, SourceLocation Loc, const char *&PrevSpec,
645 unsigned &DiagID, const PrintingPolicy &Policy);
646 bool SetTypeSpecComplex(TSC C, SourceLocation Loc, const char *&PrevSpec,
648 bool SetTypeSpecSign(TSS S, SourceLocation Loc, const char *&PrevSpec,
650 bool SetTypeSpecType(TST T, SourceLocation Loc, const char *&PrevSpec,
651 unsigned &DiagID, const PrintingPolicy &Policy);
652 bool SetTypeSpecType(TST T, SourceLocation Loc, const char *&PrevSpec,
653 unsigned &DiagID, ParsedType Rep,
654 const PrintingPolicy &Policy);
655 bool SetTypeSpecType(TST T, SourceLocation Loc, const char *&PrevSpec,
656 unsigned &DiagID, Decl *Rep, bool Owned,
657 const PrintingPolicy &Policy);
658 bool SetTypeSpecType(TST T, SourceLocation TagKwLoc,
659 SourceLocation TagNameLoc, const char *&PrevSpec,
660 unsigned &DiagID, ParsedType Rep,
661 const PrintingPolicy &Policy);
662 bool SetTypeSpecType(TST T, SourceLocation TagKwLoc,
663 SourceLocation TagNameLoc, const char *&PrevSpec,
664 unsigned &DiagID, Decl *Rep, bool Owned,
665 const PrintingPolicy &Policy);
667 bool SetTypeSpecType(TST T, SourceLocation Loc, const char *&PrevSpec,
668 unsigned &DiagID, Expr *Rep,
669 const PrintingPolicy &policy);
670 bool SetTypeAltiVecVector(bool isAltiVecVector, SourceLocation Loc,
671 const char *&PrevSpec, unsigned &DiagID,
672 const PrintingPolicy &Policy);
673 bool SetTypeAltiVecPixel(bool isAltiVecPixel, SourceLocation Loc,
674 const char *&PrevSpec, unsigned &DiagID,
675 const PrintingPolicy &Policy);
676 bool SetTypeAltiVecBool(bool isAltiVecBool, SourceLocation Loc,
677 const char *&PrevSpec, unsigned &DiagID,
678 const PrintingPolicy &Policy);
679 bool SetTypePipe(bool isPipe, SourceLocation Loc,
680 const char *&PrevSpec, unsigned &DiagID,
681 const PrintingPolicy &Policy);
682 bool SetTypeSpecSat(SourceLocation Loc, const char *&PrevSpec,
684 bool SetTypeSpecError();
685 void UpdateDeclRep(Decl *Rep) {
686 assert(isDeclRep((TST) TypeSpecType));
689 void UpdateTypeRep(ParsedType Rep) {
690 assert(isTypeRep((TST) TypeSpecType));
693 void UpdateExprRep(Expr *Rep) {
694 assert(isExprRep((TST) TypeSpecType));
698 bool SetTypeQual(TQ T, SourceLocation Loc);
700 bool SetTypeQual(TQ T, SourceLocation Loc, const char *&PrevSpec,
701 unsigned &DiagID, const LangOptions &Lang);
703 bool setFunctionSpecInline(SourceLocation Loc, const char *&PrevSpec,
705 bool setFunctionSpecForceInline(SourceLocation Loc, const char *&PrevSpec,
707 bool setFunctionSpecVirtual(SourceLocation Loc, const char *&PrevSpec,
709 bool setFunctionSpecExplicit(SourceLocation Loc, const char *&PrevSpec,
711 bool setFunctionSpecNoreturn(SourceLocation Loc, const char *&PrevSpec,
714 bool SetFriendSpec(SourceLocation Loc, const char *&PrevSpec,
716 bool setModulePrivateSpec(SourceLocation Loc, const char *&PrevSpec,
718 bool SetConstexprSpec(SourceLocation Loc, const char *&PrevSpec,
721 bool isFriendSpecified() const { return Friend_specified; }
722 SourceLocation getFriendSpecLoc() const { return FriendLoc; }
724 bool isModulePrivateSpecified() const { return ModulePrivateLoc.isValid(); }
725 SourceLocation getModulePrivateSpecLoc() const { return ModulePrivateLoc; }
727 bool isConstexprSpecified() const { return Constexpr_specified; }
728 SourceLocation getConstexprSpecLoc() const { return ConstexprLoc; }
730 void ClearConstexprSpec() {
731 Constexpr_specified = false;
732 ConstexprLoc = SourceLocation();
735 AttributePool &getAttributePool() const {
736 return Attrs.getPool();
739 /// Concatenates two attribute lists.
741 /// The GCC attribute syntax allows for the following:
744 /// short __attribute__(( unused, deprecated ))
745 /// int __attribute__(( may_alias, aligned(16) )) var;
748 /// This declares 4 attributes using 2 lists. The following syntax is
749 /// also allowed and equivalent to the previous declaration.
752 /// short __attribute__((unused)) __attribute__((deprecated))
753 /// int __attribute__((may_alias)) __attribute__((aligned(16))) var;
756 void addAttributes(ParsedAttributesView &AL) {
757 Attrs.addAll(AL.begin(), AL.end());
760 bool hasAttributes() const { return !Attrs.empty(); }
762 ParsedAttributes &getAttributes() { return Attrs; }
763 const ParsedAttributes &getAttributes() const { return Attrs; }
765 void takeAttributesFrom(ParsedAttributes &attrs) {
766 Attrs.takeAllFrom(attrs);
769 /// Finish - This does final analysis of the declspec, issuing diagnostics for
770 /// things like "_Imaginary" (lacking an FP type). After calling this method,
771 /// DeclSpec is guaranteed self-consistent, even if an error occurred.
772 void Finish(Sema &S, const PrintingPolicy &Policy);
774 const WrittenBuiltinSpecs& getWrittenBuiltinSpecs() const {
778 ObjCDeclSpec *getObjCQualifiers() const { return ObjCQualifiers; }
779 void setObjCQualifiers(ObjCDeclSpec *quals) { ObjCQualifiers = quals; }
781 /// Checks if this DeclSpec can stand alone, without a Declarator.
783 /// Only tag declspecs can stand alone.
784 bool isMissingDeclaratorOk();
787 /// Captures information about "declaration specifiers" specific to
791 /// ObjCDeclQualifier - Qualifier used on types in method
792 /// declarations. Not all combinations are sensible. Parameters
793 /// can be one of { in, out, inout } with one of { bycopy, byref }.
794 /// Returns can either be { oneway } or not.
796 /// This should be kept in sync with Decl::ObjCDeclQualifier.
797 enum ObjCDeclQualifier {
805 DQ_CSNullability = 0x40
808 /// PropertyAttributeKind - list of property attributes.
809 /// Keep this list in sync with LLVM's Dwarf.h ApplePropertyAttributes.
810 enum ObjCPropertyAttributeKind {
812 DQ_PR_readonly = 0x01,
815 DQ_PR_readwrite = 0x08,
818 DQ_PR_nonatomic = 0x40,
820 DQ_PR_atomic = 0x100,
822 DQ_PR_strong = 0x400,
823 DQ_PR_unsafe_unretained = 0x800,
824 DQ_PR_nullability = 0x1000,
825 DQ_PR_null_resettable = 0x2000,
830 : objcDeclQualifier(DQ_None), PropertyAttributes(DQ_PR_noattr),
831 Nullability(0), GetterName(nullptr), SetterName(nullptr) { }
833 ObjCDeclQualifier getObjCDeclQualifier() const {
834 return (ObjCDeclQualifier)objcDeclQualifier;
836 void setObjCDeclQualifier(ObjCDeclQualifier DQVal) {
837 objcDeclQualifier = (ObjCDeclQualifier) (objcDeclQualifier | DQVal);
839 void clearObjCDeclQualifier(ObjCDeclQualifier DQVal) {
840 objcDeclQualifier = (ObjCDeclQualifier) (objcDeclQualifier & ~DQVal);
843 ObjCPropertyAttributeKind getPropertyAttributes() const {
844 return ObjCPropertyAttributeKind(PropertyAttributes);
846 void setPropertyAttributes(ObjCPropertyAttributeKind PRVal) {
848 (ObjCPropertyAttributeKind)(PropertyAttributes | PRVal);
851 NullabilityKind getNullability() const {
852 assert(((getObjCDeclQualifier() & DQ_CSNullability) ||
853 (getPropertyAttributes() & DQ_PR_nullability)) &&
854 "Objective-C declspec doesn't have nullability");
855 return static_cast<NullabilityKind>(Nullability);
858 SourceLocation getNullabilityLoc() const {
859 assert(((getObjCDeclQualifier() & DQ_CSNullability) ||
860 (getPropertyAttributes() & DQ_PR_nullability)) &&
861 "Objective-C declspec doesn't have nullability");
862 return NullabilityLoc;
865 void setNullability(SourceLocation loc, NullabilityKind kind) {
866 assert(((getObjCDeclQualifier() & DQ_CSNullability) ||
867 (getPropertyAttributes() & DQ_PR_nullability)) &&
868 "Set the nullability declspec or property attribute first");
869 Nullability = static_cast<unsigned>(kind);
870 NullabilityLoc = loc;
873 const IdentifierInfo *getGetterName() const { return GetterName; }
874 IdentifierInfo *getGetterName() { return GetterName; }
875 SourceLocation getGetterNameLoc() const { return GetterNameLoc; }
876 void setGetterName(IdentifierInfo *name, SourceLocation loc) {
881 const IdentifierInfo *getSetterName() const { return SetterName; }
882 IdentifierInfo *getSetterName() { return SetterName; }
883 SourceLocation getSetterNameLoc() const { return SetterNameLoc; }
884 void setSetterName(IdentifierInfo *name, SourceLocation loc) {
890 // FIXME: These two are unrelated and mutually exclusive. So perhaps
891 // we can put them in a union to reflect their mutual exclusivity
892 // (space saving is negligible).
893 unsigned objcDeclQualifier : 7;
895 // NOTE: VC++ treats enums as signed, avoid using ObjCPropertyAttributeKind
896 unsigned PropertyAttributes : 15;
898 unsigned Nullability : 2;
900 SourceLocation NullabilityLoc;
902 IdentifierInfo *GetterName; // getter name or NULL if no getter
903 IdentifierInfo *SetterName; // setter name or NULL if no setter
904 SourceLocation GetterNameLoc; // location of the getter attribute's value
905 SourceLocation SetterNameLoc; // location of the setter attribute's value
909 /// Describes the kind of unqualified-id parsed.
910 enum class UnqualifiedIdKind {
913 /// An overloaded operator name, e.g., operator+.
914 IK_OperatorFunctionId,
915 /// A conversion function name, e.g., operator int.
916 IK_ConversionFunctionId,
917 /// A user-defined literal name, e.g., operator "" _i.
918 IK_LiteralOperatorId,
919 /// A constructor name.
921 /// A constructor named via a template-id.
922 IK_ConstructorTemplateId,
923 /// A destructor name.
925 /// A template-id, e.g., f<int>.
927 /// An implicit 'self' parameter
928 IK_ImplicitSelfParam,
929 /// A deduction-guide name (a template-name)
930 IK_DeductionGuideName
933 /// Represents a C++ unqualified-id that has been parsed.
934 class UnqualifiedId {
936 UnqualifiedId(const UnqualifiedId &Other) = delete;
937 const UnqualifiedId &operator=(const UnqualifiedId &) = delete;
940 /// Describes the kind of unqualified-id parsed.
941 UnqualifiedIdKind Kind;
944 /// The kind of overloaded operator.
945 OverloadedOperatorKind Operator;
947 /// The source locations of the individual tokens that name
948 /// the operator, e.g., the "new", "[", and "]" tokens in
951 /// Different operators have different numbers of tokens in their name,
952 /// up to three. Any remaining source locations in this array will be
953 /// set to an invalid value for operators with fewer than three tokens.
954 unsigned SymbolLocations[3];
957 /// Anonymous union that holds extra data associated with the
958 /// parsed unqualified-id.
960 /// When Kind == IK_Identifier, the parsed identifier, or when
961 /// Kind == IK_UserLiteralId, the identifier suffix.
962 IdentifierInfo *Identifier;
964 /// When Kind == IK_OperatorFunctionId, the overloaded operator
966 struct OFI OperatorFunctionId;
968 /// When Kind == IK_ConversionFunctionId, the type that the
969 /// conversion function names.
970 UnionParsedType ConversionFunctionId;
972 /// When Kind == IK_ConstructorName, the class-name of the type
973 /// whose constructor is being referenced.
974 UnionParsedType ConstructorName;
976 /// When Kind == IK_DestructorName, the type referred to by the
978 UnionParsedType DestructorName;
980 /// When Kind == IK_DeductionGuideName, the parsed template-name.
981 UnionParsedTemplateTy TemplateName;
983 /// When Kind == IK_TemplateId or IK_ConstructorTemplateId,
984 /// the template-id annotation that contains the template name and
985 /// template arguments.
986 TemplateIdAnnotation *TemplateId;
989 /// The location of the first token that describes this unqualified-id,
990 /// which will be the location of the identifier, "operator" keyword,
991 /// tilde (for a destructor), or the template name of a template-id.
992 SourceLocation StartLocation;
994 /// The location of the last token that describes this unqualified-id.
995 SourceLocation EndLocation;
998 : Kind(UnqualifiedIdKind::IK_Identifier), Identifier(nullptr) {}
1000 /// Clear out this unqualified-id, setting it to default (invalid)
1003 Kind = UnqualifiedIdKind::IK_Identifier;
1004 Identifier = nullptr;
1005 StartLocation = SourceLocation();
1006 EndLocation = SourceLocation();
1009 /// Determine whether this unqualified-id refers to a valid name.
1010 bool isValid() const { return StartLocation.isValid(); }
1012 /// Determine whether this unqualified-id refers to an invalid name.
1013 bool isInvalid() const { return !isValid(); }
1015 /// Determine what kind of name we have.
1016 UnqualifiedIdKind getKind() const { return Kind; }
1017 void setKind(UnqualifiedIdKind kind) { Kind = kind; }
1019 /// Specify that this unqualified-id was parsed as an identifier.
1021 /// \param Id the parsed identifier.
1022 /// \param IdLoc the location of the parsed identifier.
1023 void setIdentifier(const IdentifierInfo *Id, SourceLocation IdLoc) {
1024 Kind = UnqualifiedIdKind::IK_Identifier;
1025 Identifier = const_cast<IdentifierInfo *>(Id);
1026 StartLocation = EndLocation = IdLoc;
1029 /// Specify that this unqualified-id was parsed as an
1030 /// operator-function-id.
1032 /// \param OperatorLoc the location of the 'operator' keyword.
1034 /// \param Op the overloaded operator.
1036 /// \param SymbolLocations the locations of the individual operator symbols
1037 /// in the operator.
1038 void setOperatorFunctionId(SourceLocation OperatorLoc,
1039 OverloadedOperatorKind Op,
1040 SourceLocation SymbolLocations[3]);
1042 /// Specify that this unqualified-id was parsed as a
1043 /// conversion-function-id.
1045 /// \param OperatorLoc the location of the 'operator' keyword.
1047 /// \param Ty the type to which this conversion function is converting.
1049 /// \param EndLoc the location of the last token that makes up the type name.
1050 void setConversionFunctionId(SourceLocation OperatorLoc,
1052 SourceLocation EndLoc) {
1053 Kind = UnqualifiedIdKind::IK_ConversionFunctionId;
1054 StartLocation = OperatorLoc;
1055 EndLocation = EndLoc;
1056 ConversionFunctionId = Ty;
1059 /// Specific that this unqualified-id was parsed as a
1060 /// literal-operator-id.
1062 /// \param Id the parsed identifier.
1064 /// \param OpLoc the location of the 'operator' keyword.
1066 /// \param IdLoc the location of the identifier.
1067 void setLiteralOperatorId(const IdentifierInfo *Id, SourceLocation OpLoc,
1068 SourceLocation IdLoc) {
1069 Kind = UnqualifiedIdKind::IK_LiteralOperatorId;
1070 Identifier = const_cast<IdentifierInfo *>(Id);
1071 StartLocation = OpLoc;
1072 EndLocation = IdLoc;
1075 /// Specify that this unqualified-id was parsed as a constructor name.
1077 /// \param ClassType the class type referred to by the constructor name.
1079 /// \param ClassNameLoc the location of the class name.
1081 /// \param EndLoc the location of the last token that makes up the type name.
1082 void setConstructorName(ParsedType ClassType,
1083 SourceLocation ClassNameLoc,
1084 SourceLocation EndLoc) {
1085 Kind = UnqualifiedIdKind::IK_ConstructorName;
1086 StartLocation = ClassNameLoc;
1087 EndLocation = EndLoc;
1088 ConstructorName = ClassType;
1091 /// Specify that this unqualified-id was parsed as a
1092 /// template-id that names a constructor.
1094 /// \param TemplateId the template-id annotation that describes the parsed
1095 /// template-id. This UnqualifiedId instance will take ownership of the
1096 /// \p TemplateId and will free it on destruction.
1097 void setConstructorTemplateId(TemplateIdAnnotation *TemplateId);
1099 /// Specify that this unqualified-id was parsed as a destructor name.
1101 /// \param TildeLoc the location of the '~' that introduces the destructor
1104 /// \param ClassType the name of the class referred to by the destructor name.
1105 void setDestructorName(SourceLocation TildeLoc,
1106 ParsedType ClassType,
1107 SourceLocation EndLoc) {
1108 Kind = UnqualifiedIdKind::IK_DestructorName;
1109 StartLocation = TildeLoc;
1110 EndLocation = EndLoc;
1111 DestructorName = ClassType;
1114 /// Specify that this unqualified-id was parsed as a template-id.
1116 /// \param TemplateId the template-id annotation that describes the parsed
1117 /// template-id. This UnqualifiedId instance will take ownership of the
1118 /// \p TemplateId and will free it on destruction.
1119 void setTemplateId(TemplateIdAnnotation *TemplateId);
1121 /// Specify that this unqualified-id was parsed as a template-name for
1122 /// a deduction-guide.
1124 /// \param Template The parsed template-name.
1125 /// \param TemplateLoc The location of the parsed template-name.
1126 void setDeductionGuideName(ParsedTemplateTy Template,
1127 SourceLocation TemplateLoc) {
1128 Kind = UnqualifiedIdKind::IK_DeductionGuideName;
1129 TemplateName = Template;
1130 StartLocation = EndLocation = TemplateLoc;
1133 /// Return the source range that covers this unqualified-id.
1134 SourceRange getSourceRange() const LLVM_READONLY {
1135 return SourceRange(StartLocation, EndLocation);
1137 SourceLocation getBeginLoc() const LLVM_READONLY { return StartLocation; }
1138 SourceLocation getEndLoc() const LLVM_READONLY { return EndLocation; }
1141 /// A set of tokens that has been cached for later parsing.
1142 typedef SmallVector<Token, 4> CachedTokens;
1144 /// One instance of this struct is used for each type in a
1145 /// declarator that is parsed.
1147 /// This is intended to be a small value object.
1148 struct DeclaratorChunk {
1150 Pointer, Reference, Array, Function, BlockPointer, MemberPointer, Paren, Pipe
1153 /// Loc - The place where this type was defined.
1155 /// EndLoc - If valid, the place where this chunck ends.
1156 SourceLocation EndLoc;
1158 SourceRange getSourceRange() const {
1159 if (EndLoc.isInvalid())
1160 return SourceRange(Loc, Loc);
1161 return SourceRange(Loc, EndLoc);
1164 ParsedAttributesView AttrList;
1166 struct PointerTypeInfo {
1167 /// The type qualifiers: const/volatile/restrict/unaligned/atomic.
1168 unsigned TypeQuals : 5;
1170 /// The location of the const-qualifier, if any.
1171 unsigned ConstQualLoc;
1173 /// The location of the volatile-qualifier, if any.
1174 unsigned VolatileQualLoc;
1176 /// The location of the restrict-qualifier, if any.
1177 unsigned RestrictQualLoc;
1179 /// The location of the _Atomic-qualifier, if any.
1180 unsigned AtomicQualLoc;
1182 /// The location of the __unaligned-qualifier, if any.
1183 unsigned UnalignedQualLoc;
1189 struct ReferenceTypeInfo {
1190 /// The type qualifier: restrict. [GNU] C++ extension
1191 bool HasRestrict : 1;
1192 /// True if this is an lvalue reference, false if it's an rvalue reference.
1198 struct ArrayTypeInfo {
1199 /// The type qualifiers for the array:
1200 /// const/volatile/restrict/__unaligned/_Atomic.
1201 unsigned TypeQuals : 5;
1203 /// True if this dimension included the 'static' keyword.
1204 unsigned hasStatic : 1;
1206 /// True if this dimension was [*]. In this case, NumElts is null.
1207 unsigned isStar : 1;
1209 /// This is the size of the array, or null if [] or [*] was specified.
1210 /// Since the parser is multi-purpose, and we don't want to impose a root
1211 /// expression class on all clients, NumElts is untyped.
1217 /// ParamInfo - An array of paraminfo objects is allocated whenever a function
1218 /// declarator is parsed. There are two interesting styles of parameters
1220 /// K&R-style identifier lists and parameter type lists. K&R-style identifier
1221 /// lists will have information about the identifier, but no type information.
1222 /// Parameter type lists will have type info (if the actions module provides
1223 /// it), but may have null identifier info: e.g. for 'void foo(int X, int)'.
1225 IdentifierInfo *Ident;
1226 SourceLocation IdentLoc;
1229 /// DefaultArgTokens - When the parameter's default argument
1230 /// cannot be parsed immediately (because it occurs within the
1231 /// declaration of a member function), it will be stored here as a
1232 /// sequence of tokens to be parsed once the class definition is
1233 /// complete. Non-NULL indicates that there is a default argument.
1234 std::unique_ptr<CachedTokens> DefaultArgTokens;
1236 ParamInfo() = default;
1237 ParamInfo(IdentifierInfo *ident, SourceLocation iloc,
1239 std::unique_ptr<CachedTokens> DefArgTokens = nullptr)
1240 : Ident(ident), IdentLoc(iloc), Param(param),
1241 DefaultArgTokens(std::move(DefArgTokens)) {}
1244 struct TypeAndRange {
1249 struct FunctionTypeInfo {
1250 /// hasPrototype - This is true if the function had at least one typed
1251 /// parameter. If the function is () or (a,b,c), then it has no prototype,
1252 /// and is treated as a K&R-style function.
1253 unsigned hasPrototype : 1;
1255 /// isVariadic - If this function has a prototype, and if that
1256 /// proto ends with ',...)', this is true. When true, EllipsisLoc
1257 /// contains the location of the ellipsis.
1258 unsigned isVariadic : 1;
1260 /// Can this declaration be a constructor-style initializer?
1261 unsigned isAmbiguous : 1;
1263 /// Whether the ref-qualifier (if any) is an lvalue reference.
1264 /// Otherwise, it's an rvalue reference.
1265 unsigned RefQualifierIsLValueRef : 1;
1267 /// ExceptionSpecType - An ExceptionSpecificationType value.
1268 unsigned ExceptionSpecType : 4;
1270 /// DeleteParams - If this is true, we need to delete[] Params.
1271 unsigned DeleteParams : 1;
1273 /// HasTrailingReturnType - If this is true, a trailing return type was
1275 unsigned HasTrailingReturnType : 1;
1277 /// The location of the left parenthesis in the source.
1280 /// When isVariadic is true, the location of the ellipsis in the source.
1281 unsigned EllipsisLoc;
1283 /// The location of the right parenthesis in the source.
1286 /// NumParams - This is the number of formal parameters specified by the
1290 /// NumExceptionsOrDecls - This is the number of types in the
1291 /// dynamic-exception-decl, if the function has one. In C, this is the
1292 /// number of declarations in the function prototype.
1293 unsigned NumExceptionsOrDecls;
1295 /// The location of the ref-qualifier, if any.
1297 /// If this is an invalid location, there is no ref-qualifier.
1298 unsigned RefQualifierLoc;
1300 /// The location of the 'mutable' qualifer in a lambda-declarator, if
1302 unsigned MutableLoc;
1304 /// The beginning location of the exception specification, if any.
1305 unsigned ExceptionSpecLocBeg;
1307 /// The end location of the exception specification, if any.
1308 unsigned ExceptionSpecLocEnd;
1310 /// Params - This is a pointer to a new[]'d array of ParamInfo objects that
1311 /// describe the parameters specified by this function declarator. null if
1312 /// there are no parameters specified.
1315 /// DeclSpec for the function with the qualifier related info.
1316 DeclSpec *MethodQualifiers;
1318 /// AtttibuteFactory for the MethodQualifiers.
1319 AttributeFactory *QualAttrFactory;
1322 /// Pointer to a new[]'d array of TypeAndRange objects that
1323 /// contain the types in the function's dynamic exception specification
1324 /// and their locations, if there is one.
1325 TypeAndRange *Exceptions;
1327 /// Pointer to the expression in the noexcept-specifier of this
1328 /// function, if it has one.
1331 /// Pointer to the cached tokens for an exception-specification
1332 /// that has not yet been parsed.
1333 CachedTokens *ExceptionSpecTokens;
1335 /// Pointer to a new[]'d array of declarations that need to be available
1336 /// for lookup inside the function body, if one exists. Does not exist in
1338 NamedDecl **DeclsInPrototype;
1341 /// If HasTrailingReturnType is true, this is the trailing return
1343 UnionParsedType TrailingReturnType;
1345 /// Reset the parameter list to having zero parameters.
1347 /// This is used in various places for error recovery.
1349 for (unsigned I = 0; I < NumParams; ++I)
1350 Params[I].DefaultArgTokens.reset();
1353 DeleteParams = false;
1360 delete QualAttrFactory;
1361 delete MethodQualifiers;
1362 switch (getExceptionSpecType()) {
1366 delete[] Exceptions;
1369 delete ExceptionSpecTokens;
1372 if (NumExceptionsOrDecls != 0)
1373 delete[] DeclsInPrototype;
1378 DeclSpec &getOrCreateMethodQualifiers() {
1379 if (!MethodQualifiers) {
1380 QualAttrFactory = new AttributeFactory();
1381 MethodQualifiers = new DeclSpec(*QualAttrFactory);
1383 return *MethodQualifiers;
1386 /// isKNRPrototype - Return true if this is a K&R style identifier list,
1387 /// like "void foo(a,b,c)". In a function definition, this will be followed
1388 /// by the parameter type definitions.
1389 bool isKNRPrototype() const { return !hasPrototype && NumParams != 0; }
1391 SourceLocation getLParenLoc() const {
1392 return SourceLocation::getFromRawEncoding(LParenLoc);
1395 SourceLocation getEllipsisLoc() const {
1396 return SourceLocation::getFromRawEncoding(EllipsisLoc);
1399 SourceLocation getRParenLoc() const {
1400 return SourceLocation::getFromRawEncoding(RParenLoc);
1403 SourceLocation getExceptionSpecLocBeg() const {
1404 return SourceLocation::getFromRawEncoding(ExceptionSpecLocBeg);
1407 SourceLocation getExceptionSpecLocEnd() const {
1408 return SourceLocation::getFromRawEncoding(ExceptionSpecLocEnd);
1411 SourceRange getExceptionSpecRange() const {
1412 return SourceRange(getExceptionSpecLocBeg(), getExceptionSpecLocEnd());
1415 /// Retrieve the location of the ref-qualifier, if any.
1416 SourceLocation getRefQualifierLoc() const {
1417 return SourceLocation::getFromRawEncoding(RefQualifierLoc);
1420 /// Retrieve the location of the 'const' qualifier.
1421 SourceLocation getConstQualifierLoc() const {
1422 assert(MethodQualifiers);
1423 return MethodQualifiers->getConstSpecLoc();
1426 /// Retrieve the location of the 'volatile' qualifier.
1427 SourceLocation getVolatileQualifierLoc() const {
1428 assert(MethodQualifiers);
1429 return MethodQualifiers->getVolatileSpecLoc();
1432 /// Retrieve the location of the 'restrict' qualifier.
1433 SourceLocation getRestrictQualifierLoc() const {
1434 assert(MethodQualifiers);
1435 return MethodQualifiers->getRestrictSpecLoc();
1438 /// Retrieve the location of the 'mutable' qualifier, if any.
1439 SourceLocation getMutableLoc() const {
1440 return SourceLocation::getFromRawEncoding(MutableLoc);
1443 /// Determine whether this function declaration contains a
1445 bool hasRefQualifier() const { return getRefQualifierLoc().isValid(); }
1447 /// Determine whether this lambda-declarator contains a 'mutable'
1449 bool hasMutableQualifier() const { return getMutableLoc().isValid(); }
1451 /// Determine whether this method has qualifiers.
1452 bool hasMethodTypeQualifiers() const {
1453 return MethodQualifiers && (MethodQualifiers->getTypeQualifiers() ||
1454 MethodQualifiers->getAttributes().size());
1457 /// Get the type of exception specification this function has.
1458 ExceptionSpecificationType getExceptionSpecType() const {
1459 return static_cast<ExceptionSpecificationType>(ExceptionSpecType);
1462 /// Get the number of dynamic exception specifications.
1463 unsigned getNumExceptions() const {
1464 assert(ExceptionSpecType != EST_None);
1465 return NumExceptionsOrDecls;
1468 /// Get the non-parameter decls defined within this function
1469 /// prototype. Typically these are tag declarations.
1470 ArrayRef<NamedDecl *> getDeclsInPrototype() const {
1471 assert(ExceptionSpecType == EST_None);
1472 return llvm::makeArrayRef(DeclsInPrototype, NumExceptionsOrDecls);
1475 /// Determine whether this function declarator had a
1476 /// trailing-return-type.
1477 bool hasTrailingReturnType() const { return HasTrailingReturnType; }
1479 /// Get the trailing-return-type for this function declarator.
1480 ParsedType getTrailingReturnType() const { return TrailingReturnType; }
1483 struct BlockPointerTypeInfo {
1484 /// For now, sema will catch these as invalid.
1485 /// The type qualifiers: const/volatile/restrict/__unaligned/_Atomic.
1486 unsigned TypeQuals : 5;
1492 struct MemberPointerTypeInfo {
1493 /// The type qualifiers: const/volatile/restrict/__unaligned/_Atomic.
1494 unsigned TypeQuals : 5;
1495 // CXXScopeSpec has a constructor, so it can't be a direct member.
1496 // So we need some pointer-aligned storage and a bit of trickery.
1497 alignas(CXXScopeSpec) char ScopeMem[sizeof(CXXScopeSpec)];
1498 CXXScopeSpec &Scope() {
1499 return *reinterpret_cast<CXXScopeSpec *>(ScopeMem);
1501 const CXXScopeSpec &Scope() const {
1502 return *reinterpret_cast<const CXXScopeSpec *>(ScopeMem);
1505 Scope().~CXXScopeSpec();
1509 struct PipeTypeInfo {
1510 /// The access writes.
1511 unsigned AccessWrites : 3;
1517 PointerTypeInfo Ptr;
1518 ReferenceTypeInfo Ref;
1520 FunctionTypeInfo Fun;
1521 BlockPointerTypeInfo Cls;
1522 MemberPointerTypeInfo Mem;
1523 PipeTypeInfo PipeInfo;
1528 case DeclaratorChunk::Function: return Fun.destroy();
1529 case DeclaratorChunk::Pointer: return Ptr.destroy();
1530 case DeclaratorChunk::BlockPointer: return Cls.destroy();
1531 case DeclaratorChunk::Reference: return Ref.destroy();
1532 case DeclaratorChunk::Array: return Arr.destroy();
1533 case DeclaratorChunk::MemberPointer: return Mem.destroy();
1534 case DeclaratorChunk::Paren: return;
1535 case DeclaratorChunk::Pipe: return PipeInfo.destroy();
1539 /// If there are attributes applied to this declaratorchunk, return
1541 const ParsedAttributesView &getAttrs() const { return AttrList; }
1542 ParsedAttributesView &getAttrs() { return AttrList; }
1544 /// Return a DeclaratorChunk for a pointer.
1545 static DeclaratorChunk getPointer(unsigned TypeQuals, SourceLocation Loc,
1546 SourceLocation ConstQualLoc,
1547 SourceLocation VolatileQualLoc,
1548 SourceLocation RestrictQualLoc,
1549 SourceLocation AtomicQualLoc,
1550 SourceLocation UnalignedQualLoc) {
1554 I.Ptr.TypeQuals = TypeQuals;
1555 I.Ptr.ConstQualLoc = ConstQualLoc.getRawEncoding();
1556 I.Ptr.VolatileQualLoc = VolatileQualLoc.getRawEncoding();
1557 I.Ptr.RestrictQualLoc = RestrictQualLoc.getRawEncoding();
1558 I.Ptr.AtomicQualLoc = AtomicQualLoc.getRawEncoding();
1559 I.Ptr.UnalignedQualLoc = UnalignedQualLoc.getRawEncoding();
1563 /// Return a DeclaratorChunk for a reference.
1564 static DeclaratorChunk getReference(unsigned TypeQuals, SourceLocation Loc,
1569 I.Ref.HasRestrict = (TypeQuals & DeclSpec::TQ_restrict) != 0;
1570 I.Ref.LValueRef = lvalue;
1574 /// Return a DeclaratorChunk for an array.
1575 static DeclaratorChunk getArray(unsigned TypeQuals,
1576 bool isStatic, bool isStar, Expr *NumElts,
1577 SourceLocation LBLoc, SourceLocation RBLoc) {
1582 I.Arr.TypeQuals = TypeQuals;
1583 I.Arr.hasStatic = isStatic;
1584 I.Arr.isStar = isStar;
1585 I.Arr.NumElts = NumElts;
1589 /// DeclaratorChunk::getFunction - Return a DeclaratorChunk for a function.
1590 /// "TheDeclarator" is the declarator that this will be added to.
1591 static DeclaratorChunk getFunction(bool HasProto,
1593 SourceLocation LParenLoc,
1594 ParamInfo *Params, unsigned NumParams,
1595 SourceLocation EllipsisLoc,
1596 SourceLocation RParenLoc,
1597 bool RefQualifierIsLvalueRef,
1598 SourceLocation RefQualifierLoc,
1599 SourceLocation MutableLoc,
1600 ExceptionSpecificationType ESpecType,
1601 SourceRange ESpecRange,
1602 ParsedType *Exceptions,
1603 SourceRange *ExceptionRanges,
1604 unsigned NumExceptions,
1606 CachedTokens *ExceptionSpecTokens,
1607 ArrayRef<NamedDecl *> DeclsInPrototype,
1608 SourceLocation LocalRangeBegin,
1609 SourceLocation LocalRangeEnd,
1610 Declarator &TheDeclarator,
1611 TypeResult TrailingReturnType =
1613 DeclSpec *MethodQualifiers = nullptr);
1615 /// Return a DeclaratorChunk for a block.
1616 static DeclaratorChunk getBlockPointer(unsigned TypeQuals,
1617 SourceLocation Loc) {
1619 I.Kind = BlockPointer;
1621 I.Cls.TypeQuals = TypeQuals;
1625 /// Return a DeclaratorChunk for a block.
1626 static DeclaratorChunk getPipe(unsigned TypeQuals,
1627 SourceLocation Loc) {
1631 I.Cls.TypeQuals = TypeQuals;
1635 static DeclaratorChunk getMemberPointer(const CXXScopeSpec &SS,
1637 SourceLocation Loc) {
1639 I.Kind = MemberPointer;
1640 I.Loc = SS.getBeginLoc();
1642 I.Mem.TypeQuals = TypeQuals;
1643 new (I.Mem.ScopeMem) CXXScopeSpec(SS);
1647 /// Return a DeclaratorChunk for a paren.
1648 static DeclaratorChunk getParen(SourceLocation LParenLoc,
1649 SourceLocation RParenLoc) {
1653 I.EndLoc = RParenLoc;
1657 bool isParen() const {
1658 return Kind == Paren;
1662 /// A parsed C++17 decomposition declarator of the form
1663 /// '[' identifier-list ']'
1664 class DecompositionDeclarator {
1667 IdentifierInfo *Name;
1668 SourceLocation NameLoc;
1672 /// The locations of the '[' and ']' tokens.
1673 SourceLocation LSquareLoc, RSquareLoc;
1677 unsigned NumBindings : 31;
1678 unsigned DeleteBindings : 1;
1680 friend class Declarator;
1683 DecompositionDeclarator()
1684 : Bindings(nullptr), NumBindings(0), DeleteBindings(false) {}
1685 DecompositionDeclarator(const DecompositionDeclarator &G) = delete;
1686 DecompositionDeclarator &operator=(const DecompositionDeclarator &G) = delete;
1687 ~DecompositionDeclarator() {
1693 LSquareLoc = RSquareLoc = SourceLocation();
1698 DeleteBindings = false;
1701 ArrayRef<Binding> bindings() const {
1702 return llvm::makeArrayRef(Bindings, NumBindings);
1705 bool isSet() const { return LSquareLoc.isValid(); }
1707 SourceLocation getLSquareLoc() const { return LSquareLoc; }
1708 SourceLocation getRSquareLoc() const { return RSquareLoc; }
1709 SourceRange getSourceRange() const {
1710 return SourceRange(LSquareLoc, RSquareLoc);
1714 /// Described the kind of function definition (if any) provided for
1716 enum FunctionDefinitionKind {
1723 enum class DeclaratorContext {
1724 FileContext, // File scope declaration.
1725 PrototypeContext, // Within a function prototype.
1726 ObjCResultContext, // An ObjC method result type.
1727 ObjCParameterContext,// An ObjC method parameter type.
1728 KNRTypeListContext, // K&R type definition list for formals.
1729 TypeNameContext, // Abstract declarator for types.
1730 FunctionalCastContext, // Type in a C++ functional cast expression.
1731 MemberContext, // Struct/Union field.
1732 BlockContext, // Declaration within a block in a function.
1733 ForContext, // Declaration within first part of a for loop.
1734 InitStmtContext, // Declaration within optional init stmt of if/switch.
1735 ConditionContext, // Condition declaration in a C++ if/switch/while/for.
1736 TemplateParamContext,// Within a template parameter list.
1737 CXXNewContext, // C++ new-expression.
1738 CXXCatchContext, // C++ catch exception-declaration
1739 ObjCCatchContext, // Objective-C catch exception-declaration
1740 BlockLiteralContext, // Block literal declarator.
1741 LambdaExprContext, // Lambda-expression declarator.
1742 LambdaExprParameterContext, // Lambda-expression parameter declarator.
1743 ConversionIdContext, // C++ conversion-type-id.
1744 TrailingReturnContext, // C++11 trailing-type-specifier.
1745 TrailingReturnVarContext, // C++11 trailing-type-specifier for variable.
1746 TemplateArgContext, // Any template argument (in template argument list).
1747 TemplateTypeArgContext, // Template type argument (in default argument).
1748 AliasDeclContext, // C++11 alias-declaration.
1749 AliasTemplateContext // C++11 alias-declaration template.
1753 /// Information about one declarator, including the parsed type
1754 /// information and the identifier.
1756 /// When the declarator is fully formed, this is turned into the appropriate
1759 /// Declarators come in two types: normal declarators and abstract declarators.
1760 /// Abstract declarators are used when parsing types, and don't have an
1761 /// identifier. Normal declarators do have ID's.
1763 /// Instances of this class should be a transient object that lives on the
1764 /// stack, not objects that are allocated in large quantities on the heap.
1773 /// Where we are parsing this declarator.
1774 DeclaratorContext Context;
1776 /// The C++17 structured binding, if any. This is an alternative to a Name.
1777 DecompositionDeclarator BindingGroup;
1779 /// DeclTypeInfo - This holds each type that the declarator includes as it is
1780 /// parsed. This is pushed from the identifier out, which means that element
1781 /// #0 will be the most closely bound to the identifier, and
1782 /// DeclTypeInfo.back() will be the least closely bound.
1783 SmallVector<DeclaratorChunk, 8> DeclTypeInfo;
1785 /// InvalidType - Set by Sema::GetTypeForDeclarator().
1786 unsigned InvalidType : 1;
1788 /// GroupingParens - Set by Parser::ParseParenDeclarator().
1789 unsigned GroupingParens : 1;
1791 /// FunctionDefinition - Is this Declarator for a function or member
1792 /// definition and, if so, what kind?
1794 /// Actually a FunctionDefinitionKind.
1795 unsigned FunctionDefinition : 2;
1797 /// Is this Declarator a redeclaration?
1798 unsigned Redeclaration : 1;
1800 /// true if the declaration is preceded by \c __extension__.
1801 unsigned Extension : 1;
1803 /// Indicates whether this is an Objective-C instance variable.
1804 unsigned ObjCIvar : 1;
1806 /// Indicates whether this is an Objective-C 'weak' property.
1807 unsigned ObjCWeakProperty : 1;
1809 /// Indicates whether the InlineParams / InlineBindings storage has been used.
1810 unsigned InlineStorageUsed : 1;
1812 /// Attrs - Attributes.
1813 ParsedAttributes Attrs;
1815 /// The asm label, if specified.
1821 /// InlineParams - This is a local array used for the first function decl
1822 /// chunk to avoid going to the heap for the common case when we have one
1823 /// function chunk in the declarator.
1824 DeclaratorChunk::ParamInfo InlineParams[16];
1825 DecompositionDeclarator::Binding InlineBindings[16];
1830 /// If this is the second or subsequent declarator in this declaration,
1831 /// the location of the comma before this declarator.
1832 SourceLocation CommaLoc;
1834 /// If provided, the source location of the ellipsis used to describe
1835 /// this declarator as a parameter pack.
1836 SourceLocation EllipsisLoc;
1838 friend struct DeclaratorChunk;
1841 Declarator(const DeclSpec &ds, DeclaratorContext C)
1842 : DS(ds), Range(ds.getSourceRange()), Context(C),
1843 InvalidType(DS.getTypeSpecType() == DeclSpec::TST_error),
1844 GroupingParens(false), FunctionDefinition(FDK_Declaration),
1845 Redeclaration(false), Extension(false), ObjCIvar(false),
1846 ObjCWeakProperty(false), InlineStorageUsed(false),
1847 Attrs(ds.getAttributePool().getFactory()), AsmLabel(nullptr) {}
1852 /// getDeclSpec - Return the declaration-specifier that this declarator was
1854 const DeclSpec &getDeclSpec() const { return DS; }
1856 /// getMutableDeclSpec - Return a non-const version of the DeclSpec. This
1857 /// should be used with extreme care: declspecs can often be shared between
1858 /// multiple declarators, so mutating the DeclSpec affects all of the
1859 /// Declarators. This should only be done when the declspec is known to not
1860 /// be shared or when in error recovery etc.
1861 DeclSpec &getMutableDeclSpec() { return const_cast<DeclSpec &>(DS); }
1863 AttributePool &getAttributePool() const {
1864 return Attrs.getPool();
1867 /// getCXXScopeSpec - Return the C++ scope specifier (global scope or
1868 /// nested-name-specifier) that is part of the declarator-id.
1869 const CXXScopeSpec &getCXXScopeSpec() const { return SS; }
1870 CXXScopeSpec &getCXXScopeSpec() { return SS; }
1872 /// Retrieve the name specified by this declarator.
1873 UnqualifiedId &getName() { return Name; }
1875 const DecompositionDeclarator &getDecompositionDeclarator() const {
1876 return BindingGroup;
1879 DeclaratorContext getContext() const { return Context; }
1881 bool isPrototypeContext() const {
1882 return (Context == DeclaratorContext::PrototypeContext ||
1883 Context == DeclaratorContext::ObjCParameterContext ||
1884 Context == DeclaratorContext::ObjCResultContext ||
1885 Context == DeclaratorContext::LambdaExprParameterContext);
1888 /// Get the source range that spans this declarator.
1889 SourceRange getSourceRange() const LLVM_READONLY { return Range; }
1890 SourceLocation getBeginLoc() const LLVM_READONLY { return Range.getBegin(); }
1891 SourceLocation getEndLoc() const LLVM_READONLY { return Range.getEnd(); }
1893 void SetSourceRange(SourceRange R) { Range = R; }
1894 /// SetRangeBegin - Set the start of the source range to Loc, unless it's
1896 void SetRangeBegin(SourceLocation Loc) {
1897 if (!Loc.isInvalid())
1898 Range.setBegin(Loc);
1900 /// SetRangeEnd - Set the end of the source range to Loc, unless it's invalid.
1901 void SetRangeEnd(SourceLocation Loc) {
1902 if (!Loc.isInvalid())
1905 /// ExtendWithDeclSpec - Extend the declarator source range to include the
1906 /// given declspec, unless its location is invalid. Adopts the range start if
1907 /// the current range start is invalid.
1908 void ExtendWithDeclSpec(const DeclSpec &DS) {
1909 SourceRange SR = DS.getSourceRange();
1910 if (Range.getBegin().isInvalid())
1911 Range.setBegin(SR.getBegin());
1912 if (!SR.getEnd().isInvalid())
1913 Range.setEnd(SR.getEnd());
1916 /// Reset the contents of this Declarator.
1920 Range = DS.getSourceRange();
1921 BindingGroup.clear();
1923 for (unsigned i = 0, e = DeclTypeInfo.size(); i != e; ++i)
1924 DeclTypeInfo[i].destroy();
1925 DeclTypeInfo.clear();
1928 InlineStorageUsed = false;
1930 ObjCWeakProperty = false;
1931 CommaLoc = SourceLocation();
1932 EllipsisLoc = SourceLocation();
1935 /// mayOmitIdentifier - Return true if the identifier is either optional or
1936 /// not allowed. This is true for typenames, prototypes, and template
1937 /// parameter lists.
1938 bool mayOmitIdentifier() const {
1940 case DeclaratorContext::FileContext:
1941 case DeclaratorContext::KNRTypeListContext:
1942 case DeclaratorContext::MemberContext:
1943 case DeclaratorContext::BlockContext:
1944 case DeclaratorContext::ForContext:
1945 case DeclaratorContext::InitStmtContext:
1946 case DeclaratorContext::ConditionContext:
1949 case DeclaratorContext::TypeNameContext:
1950 case DeclaratorContext::FunctionalCastContext:
1951 case DeclaratorContext::AliasDeclContext:
1952 case DeclaratorContext::AliasTemplateContext:
1953 case DeclaratorContext::PrototypeContext:
1954 case DeclaratorContext::LambdaExprParameterContext:
1955 case DeclaratorContext::ObjCParameterContext:
1956 case DeclaratorContext::ObjCResultContext:
1957 case DeclaratorContext::TemplateParamContext:
1958 case DeclaratorContext::CXXNewContext:
1959 case DeclaratorContext::CXXCatchContext:
1960 case DeclaratorContext::ObjCCatchContext:
1961 case DeclaratorContext::BlockLiteralContext:
1962 case DeclaratorContext::LambdaExprContext:
1963 case DeclaratorContext::ConversionIdContext:
1964 case DeclaratorContext::TemplateArgContext:
1965 case DeclaratorContext::TemplateTypeArgContext:
1966 case DeclaratorContext::TrailingReturnContext:
1967 case DeclaratorContext::TrailingReturnVarContext:
1970 llvm_unreachable("unknown context kind!");
1973 /// mayHaveIdentifier - Return true if the identifier is either optional or
1974 /// required. This is true for normal declarators and prototypes, but not
1976 bool mayHaveIdentifier() const {
1978 case DeclaratorContext::FileContext:
1979 case DeclaratorContext::KNRTypeListContext:
1980 case DeclaratorContext::MemberContext:
1981 case DeclaratorContext::BlockContext:
1982 case DeclaratorContext::ForContext:
1983 case DeclaratorContext::InitStmtContext:
1984 case DeclaratorContext::ConditionContext:
1985 case DeclaratorContext::PrototypeContext:
1986 case DeclaratorContext::LambdaExprParameterContext:
1987 case DeclaratorContext::TemplateParamContext:
1988 case DeclaratorContext::CXXCatchContext:
1989 case DeclaratorContext::ObjCCatchContext:
1992 case DeclaratorContext::TypeNameContext:
1993 case DeclaratorContext::FunctionalCastContext:
1994 case DeclaratorContext::CXXNewContext:
1995 case DeclaratorContext::AliasDeclContext:
1996 case DeclaratorContext::AliasTemplateContext:
1997 case DeclaratorContext::ObjCParameterContext:
1998 case DeclaratorContext::ObjCResultContext:
1999 case DeclaratorContext::BlockLiteralContext:
2000 case DeclaratorContext::LambdaExprContext:
2001 case DeclaratorContext::ConversionIdContext:
2002 case DeclaratorContext::TemplateArgContext:
2003 case DeclaratorContext::TemplateTypeArgContext:
2004 case DeclaratorContext::TrailingReturnContext:
2005 case DeclaratorContext::TrailingReturnVarContext:
2008 llvm_unreachable("unknown context kind!");
2011 /// Return true if the context permits a C++17 decomposition declarator.
2012 bool mayHaveDecompositionDeclarator() const {
2014 case DeclaratorContext::FileContext:
2015 // FIXME: It's not clear that the proposal meant to allow file-scope
2016 // structured bindings, but it does.
2017 case DeclaratorContext::BlockContext:
2018 case DeclaratorContext::ForContext:
2019 case DeclaratorContext::InitStmtContext:
2020 case DeclaratorContext::ConditionContext:
2023 case DeclaratorContext::MemberContext:
2024 case DeclaratorContext::PrototypeContext:
2025 case DeclaratorContext::TemplateParamContext:
2029 // These contexts don't allow any kind of non-abstract declarator.
2030 case DeclaratorContext::KNRTypeListContext:
2031 case DeclaratorContext::TypeNameContext:
2032 case DeclaratorContext::FunctionalCastContext:
2033 case DeclaratorContext::AliasDeclContext:
2034 case DeclaratorContext::AliasTemplateContext:
2035 case DeclaratorContext::LambdaExprParameterContext:
2036 case DeclaratorContext::ObjCParameterContext:
2037 case DeclaratorContext::ObjCResultContext:
2038 case DeclaratorContext::CXXNewContext:
2039 case DeclaratorContext::CXXCatchContext:
2040 case DeclaratorContext::ObjCCatchContext:
2041 case DeclaratorContext::BlockLiteralContext:
2042 case DeclaratorContext::LambdaExprContext:
2043 case DeclaratorContext::ConversionIdContext:
2044 case DeclaratorContext::TemplateArgContext:
2045 case DeclaratorContext::TemplateTypeArgContext:
2046 case DeclaratorContext::TrailingReturnContext:
2047 case DeclaratorContext::TrailingReturnVarContext:
2050 llvm_unreachable("unknown context kind!");
2053 /// mayBeFollowedByCXXDirectInit - Return true if the declarator can be
2054 /// followed by a C++ direct initializer, e.g. "int x(1);".
2055 bool mayBeFollowedByCXXDirectInit() const {
2056 if (hasGroupingParens()) return false;
2058 if (getDeclSpec().getStorageClassSpec() == DeclSpec::SCS_typedef)
2061 if (getDeclSpec().getStorageClassSpec() == DeclSpec::SCS_extern &&
2062 Context != DeclaratorContext::FileContext)
2065 // Special names can't have direct initializers.
2066 if (Name.getKind() != UnqualifiedIdKind::IK_Identifier)
2070 case DeclaratorContext::FileContext:
2071 case DeclaratorContext::BlockContext:
2072 case DeclaratorContext::ForContext:
2073 case DeclaratorContext::InitStmtContext:
2074 case DeclaratorContext::TrailingReturnVarContext:
2077 case DeclaratorContext::ConditionContext:
2078 // This may not be followed by a direct initializer, but it can't be a
2079 // function declaration either, and we'd prefer to perform a tentative
2080 // parse in order to produce the right diagnostic.
2083 case DeclaratorContext::KNRTypeListContext:
2084 case DeclaratorContext::MemberContext:
2085 case DeclaratorContext::PrototypeContext:
2086 case DeclaratorContext::LambdaExprParameterContext:
2087 case DeclaratorContext::ObjCParameterContext:
2088 case DeclaratorContext::ObjCResultContext:
2089 case DeclaratorContext::TemplateParamContext:
2090 case DeclaratorContext::CXXCatchContext:
2091 case DeclaratorContext::ObjCCatchContext:
2092 case DeclaratorContext::TypeNameContext:
2093 case DeclaratorContext::FunctionalCastContext: // FIXME
2094 case DeclaratorContext::CXXNewContext:
2095 case DeclaratorContext::AliasDeclContext:
2096 case DeclaratorContext::AliasTemplateContext:
2097 case DeclaratorContext::BlockLiteralContext:
2098 case DeclaratorContext::LambdaExprContext:
2099 case DeclaratorContext::ConversionIdContext:
2100 case DeclaratorContext::TemplateArgContext:
2101 case DeclaratorContext::TemplateTypeArgContext:
2102 case DeclaratorContext::TrailingReturnContext:
2105 llvm_unreachable("unknown context kind!");
2108 /// isPastIdentifier - Return true if we have parsed beyond the point where
2109 /// the name would appear. (This may happen even if we haven't actually parsed
2110 /// a name, perhaps because this context doesn't require one.)
2111 bool isPastIdentifier() const { return Name.isValid(); }
2113 /// hasName - Whether this declarator has a name, which might be an
2114 /// identifier (accessible via getIdentifier()) or some kind of
2115 /// special C++ name (constructor, destructor, etc.), or a structured
2116 /// binding (which is not exactly a name, but occupies the same position).
2117 bool hasName() const {
2118 return Name.getKind() != UnqualifiedIdKind::IK_Identifier ||
2119 Name.Identifier || isDecompositionDeclarator();
2122 /// Return whether this declarator is a decomposition declarator.
2123 bool isDecompositionDeclarator() const {
2124 return BindingGroup.isSet();
2127 IdentifierInfo *getIdentifier() const {
2128 if (Name.getKind() == UnqualifiedIdKind::IK_Identifier)
2129 return Name.Identifier;
2133 SourceLocation getIdentifierLoc() const { return Name.StartLocation; }
2135 /// Set the name of this declarator to be the given identifier.
2136 void SetIdentifier(IdentifierInfo *Id, SourceLocation IdLoc) {
2137 Name.setIdentifier(Id, IdLoc);
2140 /// Set the decomposition bindings for this declarator.
2142 setDecompositionBindings(SourceLocation LSquareLoc,
2143 ArrayRef<DecompositionDeclarator::Binding> Bindings,
2144 SourceLocation RSquareLoc);
2146 /// AddTypeInfo - Add a chunk to this declarator. Also extend the range to
2147 /// EndLoc, which should be the last token of the chunk.
2148 /// This function takes attrs by R-Value reference because it takes ownership
2149 /// of those attributes from the parameter.
2150 void AddTypeInfo(const DeclaratorChunk &TI, ParsedAttributes &&attrs,
2151 SourceLocation EndLoc) {
2152 DeclTypeInfo.push_back(TI);
2153 DeclTypeInfo.back().getAttrs().addAll(attrs.begin(), attrs.end());
2154 getAttributePool().takeAllFrom(attrs.getPool());
2156 if (!EndLoc.isInvalid())
2157 SetRangeEnd(EndLoc);
2160 /// AddTypeInfo - Add a chunk to this declarator. Also extend the range to
2161 /// EndLoc, which should be the last token of the chunk.
2162 void AddTypeInfo(const DeclaratorChunk &TI, SourceLocation EndLoc) {
2163 DeclTypeInfo.push_back(TI);
2165 if (!EndLoc.isInvalid())
2166 SetRangeEnd(EndLoc);
2169 /// Add a new innermost chunk to this declarator.
2170 void AddInnermostTypeInfo(const DeclaratorChunk &TI) {
2171 DeclTypeInfo.insert(DeclTypeInfo.begin(), TI);
2174 /// Return the number of types applied to this declarator.
2175 unsigned getNumTypeObjects() const { return DeclTypeInfo.size(); }
2177 /// Return the specified TypeInfo from this declarator. TypeInfo #0 is
2178 /// closest to the identifier.
2179 const DeclaratorChunk &getTypeObject(unsigned i) const {
2180 assert(i < DeclTypeInfo.size() && "Invalid type chunk");
2181 return DeclTypeInfo[i];
2183 DeclaratorChunk &getTypeObject(unsigned i) {
2184 assert(i < DeclTypeInfo.size() && "Invalid type chunk");
2185 return DeclTypeInfo[i];
2188 typedef SmallVectorImpl<DeclaratorChunk>::const_iterator type_object_iterator;
2189 typedef llvm::iterator_range<type_object_iterator> type_object_range;
2191 /// Returns the range of type objects, from the identifier outwards.
2192 type_object_range type_objects() const {
2193 return type_object_range(DeclTypeInfo.begin(), DeclTypeInfo.end());
2196 void DropFirstTypeObject() {
2197 assert(!DeclTypeInfo.empty() && "No type chunks to drop.");
2198 DeclTypeInfo.front().destroy();
2199 DeclTypeInfo.erase(DeclTypeInfo.begin());
2202 /// Return the innermost (closest to the declarator) chunk of this
2203 /// declarator that is not a parens chunk, or null if there are no
2204 /// non-parens chunks.
2205 const DeclaratorChunk *getInnermostNonParenChunk() const {
2206 for (unsigned i = 0, i_end = DeclTypeInfo.size(); i < i_end; ++i) {
2207 if (!DeclTypeInfo[i].isParen())
2208 return &DeclTypeInfo[i];
2213 /// Return the outermost (furthest from the declarator) chunk of
2214 /// this declarator that is not a parens chunk, or null if there are
2215 /// no non-parens chunks.
2216 const DeclaratorChunk *getOutermostNonParenChunk() const {
2217 for (unsigned i = DeclTypeInfo.size(), i_end = 0; i != i_end; --i) {
2218 if (!DeclTypeInfo[i-1].isParen())
2219 return &DeclTypeInfo[i-1];
2224 /// isArrayOfUnknownBound - This method returns true if the declarator
2225 /// is a declarator for an array of unknown bound (looking through
2227 bool isArrayOfUnknownBound() const {
2228 const DeclaratorChunk *chunk = getInnermostNonParenChunk();
2229 return (chunk && chunk->Kind == DeclaratorChunk::Array &&
2230 !chunk->Arr.NumElts);
2233 /// isFunctionDeclarator - This method returns true if the declarator
2234 /// is a function declarator (looking through parentheses).
2235 /// If true is returned, then the reference type parameter idx is
2236 /// assigned with the index of the declaration chunk.
2237 bool isFunctionDeclarator(unsigned& idx) const {
2238 for (unsigned i = 0, i_end = DeclTypeInfo.size(); i < i_end; ++i) {
2239 switch (DeclTypeInfo[i].Kind) {
2240 case DeclaratorChunk::Function:
2243 case DeclaratorChunk::Paren:
2245 case DeclaratorChunk::Pointer:
2246 case DeclaratorChunk::Reference:
2247 case DeclaratorChunk::Array:
2248 case DeclaratorChunk::BlockPointer:
2249 case DeclaratorChunk::MemberPointer:
2250 case DeclaratorChunk::Pipe:
2253 llvm_unreachable("Invalid type chunk");
2258 /// isFunctionDeclarator - Once this declarator is fully parsed and formed,
2259 /// this method returns true if the identifier is a function declarator
2260 /// (looking through parentheses).
2261 bool isFunctionDeclarator() const {
2263 return isFunctionDeclarator(index);
2266 /// getFunctionTypeInfo - Retrieves the function type info object
2267 /// (looking through parentheses).
2268 DeclaratorChunk::FunctionTypeInfo &getFunctionTypeInfo() {
2269 assert(isFunctionDeclarator() && "Not a function declarator!");
2271 isFunctionDeclarator(index);
2272 return DeclTypeInfo[index].Fun;
2275 /// getFunctionTypeInfo - Retrieves the function type info object
2276 /// (looking through parentheses).
2277 const DeclaratorChunk::FunctionTypeInfo &getFunctionTypeInfo() const {
2278 return const_cast<Declarator*>(this)->getFunctionTypeInfo();
2281 /// Determine whether the declaration that will be produced from
2282 /// this declaration will be a function.
2284 /// A declaration can declare a function even if the declarator itself
2285 /// isn't a function declarator, if the type specifier refers to a function
2286 /// type. This routine checks for both cases.
2287 bool isDeclarationOfFunction() const;
2289 /// Return true if this declaration appears in a context where a
2290 /// function declarator would be a function declaration.
2291 bool isFunctionDeclarationContext() const {
2292 if (getDeclSpec().getStorageClassSpec() == DeclSpec::SCS_typedef)
2296 case DeclaratorContext::FileContext:
2297 case DeclaratorContext::MemberContext:
2298 case DeclaratorContext::BlockContext:
2299 case DeclaratorContext::ForContext:
2300 case DeclaratorContext::InitStmtContext:
2303 case DeclaratorContext::ConditionContext:
2304 case DeclaratorContext::KNRTypeListContext:
2305 case DeclaratorContext::TypeNameContext:
2306 case DeclaratorContext::FunctionalCastContext:
2307 case DeclaratorContext::AliasDeclContext:
2308 case DeclaratorContext::AliasTemplateContext:
2309 case DeclaratorContext::PrototypeContext:
2310 case DeclaratorContext::LambdaExprParameterContext:
2311 case DeclaratorContext::ObjCParameterContext:
2312 case DeclaratorContext::ObjCResultContext:
2313 case DeclaratorContext::TemplateParamContext:
2314 case DeclaratorContext::CXXNewContext:
2315 case DeclaratorContext::CXXCatchContext:
2316 case DeclaratorContext::ObjCCatchContext:
2317 case DeclaratorContext::BlockLiteralContext:
2318 case DeclaratorContext::LambdaExprContext:
2319 case DeclaratorContext::ConversionIdContext:
2320 case DeclaratorContext::TemplateArgContext:
2321 case DeclaratorContext::TemplateTypeArgContext:
2322 case DeclaratorContext::TrailingReturnContext:
2323 case DeclaratorContext::TrailingReturnVarContext:
2326 llvm_unreachable("unknown context kind!");
2329 /// Determine whether this declaration appears in a context where an
2330 /// expression could appear.
2331 bool isExpressionContext() const {
2333 case DeclaratorContext::FileContext:
2334 case DeclaratorContext::KNRTypeListContext:
2335 case DeclaratorContext::MemberContext:
2337 // FIXME: sizeof(...) permits an expression.
2338 case DeclaratorContext::TypeNameContext:
2340 case DeclaratorContext::FunctionalCastContext:
2341 case DeclaratorContext::AliasDeclContext:
2342 case DeclaratorContext::AliasTemplateContext:
2343 case DeclaratorContext::PrototypeContext:
2344 case DeclaratorContext::LambdaExprParameterContext:
2345 case DeclaratorContext::ObjCParameterContext:
2346 case DeclaratorContext::ObjCResultContext:
2347 case DeclaratorContext::TemplateParamContext:
2348 case DeclaratorContext::CXXNewContext:
2349 case DeclaratorContext::CXXCatchContext:
2350 case DeclaratorContext::ObjCCatchContext:
2351 case DeclaratorContext::BlockLiteralContext:
2352 case DeclaratorContext::LambdaExprContext:
2353 case DeclaratorContext::ConversionIdContext:
2354 case DeclaratorContext::TrailingReturnContext:
2355 case DeclaratorContext::TrailingReturnVarContext:
2356 case DeclaratorContext::TemplateTypeArgContext:
2359 case DeclaratorContext::BlockContext:
2360 case DeclaratorContext::ForContext:
2361 case DeclaratorContext::InitStmtContext:
2362 case DeclaratorContext::ConditionContext:
2363 case DeclaratorContext::TemplateArgContext:
2367 llvm_unreachable("unknown context kind!");
2370 /// Return true if a function declarator at this position would be a
2371 /// function declaration.
2372 bool isFunctionDeclaratorAFunctionDeclaration() const {
2373 if (!isFunctionDeclarationContext())
2376 for (unsigned I = 0, N = getNumTypeObjects(); I != N; ++I)
2377 if (getTypeObject(I).Kind != DeclaratorChunk::Paren)
2383 /// Determine whether a trailing return type was written (at any
2384 /// level) within this declarator.
2385 bool hasTrailingReturnType() const {
2386 for (const auto &Chunk : type_objects())
2387 if (Chunk.Kind == DeclaratorChunk::Function &&
2388 Chunk.Fun.hasTrailingReturnType())
2393 /// takeAttributes - Takes attributes from the given parsed-attributes
2394 /// set and add them to this declarator.
2396 /// These examples both add 3 attributes to "var":
2397 /// short int var __attribute__((aligned(16),common,deprecated));
2398 /// short int x, __attribute__((aligned(16)) var
2399 /// __attribute__((common,deprecated));
2401 /// Also extends the range of the declarator.
2402 void takeAttributes(ParsedAttributes &attrs, SourceLocation lastLoc) {
2403 Attrs.takeAllFrom(attrs);
2405 if (!lastLoc.isInvalid())
2406 SetRangeEnd(lastLoc);
2409 const ParsedAttributes &getAttributes() const { return Attrs; }
2410 ParsedAttributes &getAttributes() { return Attrs; }
2412 /// hasAttributes - do we contain any attributes?
2413 bool hasAttributes() const {
2414 if (!getAttributes().empty() || getDeclSpec().hasAttributes())
2416 for (unsigned i = 0, e = getNumTypeObjects(); i != e; ++i)
2417 if (!getTypeObject(i).getAttrs().empty())
2422 /// Return a source range list of C++11 attributes associated
2423 /// with the declarator.
2424 void getCXX11AttributeRanges(SmallVectorImpl<SourceRange> &Ranges) {
2425 for (const ParsedAttr &AL : Attrs)
2426 if (AL.isCXX11Attribute())
2427 Ranges.push_back(AL.getRange());
2430 void setAsmLabel(Expr *E) { AsmLabel = E; }
2431 Expr *getAsmLabel() const { return AsmLabel; }
2433 void setExtension(bool Val = true) { Extension = Val; }
2434 bool getExtension() const { return Extension; }
2436 void setObjCIvar(bool Val = true) { ObjCIvar = Val; }
2437 bool isObjCIvar() const { return ObjCIvar; }
2439 void setObjCWeakProperty(bool Val = true) { ObjCWeakProperty = Val; }
2440 bool isObjCWeakProperty() const { return ObjCWeakProperty; }
2442 void setInvalidType(bool Val = true) { InvalidType = Val; }
2443 bool isInvalidType() const {
2444 return InvalidType || DS.getTypeSpecType() == DeclSpec::TST_error;
2447 void setGroupingParens(bool flag) { GroupingParens = flag; }
2448 bool hasGroupingParens() const { return GroupingParens; }
2450 bool isFirstDeclarator() const { return !CommaLoc.isValid(); }
2451 SourceLocation getCommaLoc() const { return CommaLoc; }
2452 void setCommaLoc(SourceLocation CL) { CommaLoc = CL; }
2454 bool hasEllipsis() const { return EllipsisLoc.isValid(); }
2455 SourceLocation getEllipsisLoc() const { return EllipsisLoc; }
2456 void setEllipsisLoc(SourceLocation EL) { EllipsisLoc = EL; }
2458 void setFunctionDefinitionKind(FunctionDefinitionKind Val) {
2459 FunctionDefinition = Val;
2462 bool isFunctionDefinition() const {
2463 return getFunctionDefinitionKind() != FDK_Declaration;
2466 FunctionDefinitionKind getFunctionDefinitionKind() const {
2467 return (FunctionDefinitionKind)FunctionDefinition;
2470 /// Returns true if this declares a real member and not a friend.
2471 bool isFirstDeclarationOfMember() {
2472 return getContext() == DeclaratorContext::MemberContext &&
2473 !getDeclSpec().isFriendSpecified();
2476 /// Returns true if this declares a static member. This cannot be called on a
2477 /// declarator outside of a MemberContext because we won't know until
2478 /// redeclaration time if the decl is static.
2479 bool isStaticMember();
2481 /// Returns true if this declares a constructor or a destructor.
2482 bool isCtorOrDtor();
2484 void setRedeclaration(bool Val) { Redeclaration = Val; }
2485 bool isRedeclaration() const { return Redeclaration; }
2488 /// This little struct is used to capture information about
2489 /// structure field declarators, which is basically just a bitfield size.
2490 struct FieldDeclarator {
2493 explicit FieldDeclarator(const DeclSpec &DS)
2494 : D(DS, DeclaratorContext::MemberContext),
2495 BitfieldSize(nullptr) {}
2498 /// Represents a C++11 virt-specifier-seq.
2499 class VirtSpecifiers {
2506 // Represents the __final keyword, which is legal for gcc in pre-C++11 mode.
2510 VirtSpecifiers() : Specifiers(0), LastSpecifier(VS_None) { }
2512 bool SetSpecifier(Specifier VS, SourceLocation Loc,
2513 const char *&PrevSpec);
2515 bool isUnset() const { return Specifiers == 0; }
2517 bool isOverrideSpecified() const { return Specifiers & VS_Override; }
2518 SourceLocation getOverrideLoc() const { return VS_overrideLoc; }
2520 bool isFinalSpecified() const { return Specifiers & (VS_Final | VS_Sealed | VS_GNU_Final); }
2521 bool isFinalSpelledSealed() const { return Specifiers & VS_Sealed; }
2522 SourceLocation getFinalLoc() const { return VS_finalLoc; }
2524 void clear() { Specifiers = 0; }
2526 static const char *getSpecifierName(Specifier VS);
2528 SourceLocation getFirstLocation() const { return FirstLocation; }
2529 SourceLocation getLastLocation() const { return LastLocation; }
2530 Specifier getLastSpecifier() const { return LastSpecifier; }
2533 unsigned Specifiers;
2534 Specifier LastSpecifier;
2536 SourceLocation VS_overrideLoc, VS_finalLoc;
2537 SourceLocation FirstLocation;
2538 SourceLocation LastLocation;
2541 enum class LambdaCaptureInitKind {
2543 CopyInit, //!< [a = b], [a = {b}]
2544 DirectInit, //!< [a(b)]
2545 ListInit //!< [a{b}]
2548 /// Represents a complete lambda introducer.
2549 struct LambdaIntroducer {
2550 /// An individual capture in a lambda introducer.
2551 struct LambdaCapture {
2552 LambdaCaptureKind Kind;
2555 SourceLocation EllipsisLoc;
2556 LambdaCaptureInitKind InitKind;
2558 ParsedType InitCaptureType;
2559 SourceRange ExplicitRange;
2561 LambdaCapture(LambdaCaptureKind Kind, SourceLocation Loc,
2562 IdentifierInfo *Id, SourceLocation EllipsisLoc,
2563 LambdaCaptureInitKind InitKind, ExprResult Init,
2564 ParsedType InitCaptureType,
2565 SourceRange ExplicitRange)
2566 : Kind(Kind), Loc(Loc), Id(Id), EllipsisLoc(EllipsisLoc),
2567 InitKind(InitKind), Init(Init), InitCaptureType(InitCaptureType),
2568 ExplicitRange(ExplicitRange) {}
2572 SourceLocation DefaultLoc;
2573 LambdaCaptureDefault Default;
2574 SmallVector<LambdaCapture, 4> Captures;
2577 : Default(LCD_None) {}
2579 /// Append a capture in a lambda introducer.
2580 void addCapture(LambdaCaptureKind Kind,
2583 SourceLocation EllipsisLoc,
2584 LambdaCaptureInitKind InitKind,
2586 ParsedType InitCaptureType,
2587 SourceRange ExplicitRange) {
2588 Captures.push_back(LambdaCapture(Kind, Loc, Id, EllipsisLoc, InitKind, Init,
2589 InitCaptureType, ExplicitRange));
2593 } // end namespace clang
2595 #endif // LLVM_CLANG_SEMA_DECLSPEC_H