1 //===--- ParseDecl.cpp - Declaration Parsing ------------------------------===//
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 //===----------------------------------------------------------------------===//
10 // This file implements the Declaration portions of the Parser interfaces.
12 //===----------------------------------------------------------------------===//
14 #include "clang/Parse/Parser.h"
15 #include "RAIIObjectsForParser.h"
16 #include "clang/AST/ASTContext.h"
17 #include "clang/AST/DeclTemplate.h"
18 #include "clang/Basic/AddressSpaces.h"
19 #include "clang/Basic/Attributes.h"
20 #include "clang/Basic/CharInfo.h"
21 #include "clang/Basic/TargetInfo.h"
22 #include "clang/Parse/ParseDiagnostic.h"
23 #include "clang/Sema/Lookup.h"
24 #include "clang/Sema/ParsedTemplate.h"
25 #include "clang/Sema/PrettyDeclStackTrace.h"
26 #include "clang/Sema/Scope.h"
27 #include "llvm/ADT/SmallSet.h"
28 #include "llvm/ADT/SmallString.h"
29 #include "llvm/ADT/StringSwitch.h"
30 using namespace clang;
32 //===----------------------------------------------------------------------===//
33 // C99 6.7: Declarations.
34 //===----------------------------------------------------------------------===//
37 /// type-name: [C99 6.7.6]
38 /// specifier-qualifier-list abstract-declarator[opt]
40 /// Called type-id in C++.
41 TypeResult Parser::ParseTypeName(SourceRange *Range,
42 Declarator::TheContext Context,
45 ParsedAttributes *Attrs) {
46 DeclSpecContext DSC = getDeclSpecContextFromDeclaratorContext(Context);
47 if (DSC == DSC_normal)
48 DSC = DSC_type_specifier;
50 // Parse the common declaration-specifiers piece.
51 DeclSpec DS(AttrFactory);
53 DS.addAttributes(Attrs->getList());
54 ParseSpecifierQualifierList(DS, AS, DSC);
56 *OwnedType = DS.isTypeSpecOwned() ? DS.getRepAsDecl() : nullptr;
58 // Parse the abstract-declarator, if present.
59 Declarator DeclaratorInfo(DS, Context);
60 ParseDeclarator(DeclaratorInfo);
62 *Range = DeclaratorInfo.getSourceRange();
64 if (DeclaratorInfo.isInvalidType())
67 return Actions.ActOnTypeName(getCurScope(), DeclaratorInfo);
71 /// isAttributeLateParsed - Return true if the attribute has arguments that
72 /// require late parsing.
73 static bool isAttributeLateParsed(const IdentifierInfo &II) {
74 #define CLANG_ATTR_LATE_PARSED_LIST
75 return llvm::StringSwitch<bool>(II.getName())
76 #include "clang/Parse/AttrParserStringSwitches.inc"
78 #undef CLANG_ATTR_LATE_PARSED_LIST
81 /// ParseGNUAttributes - Parse a non-empty attributes list.
85 /// attributes attribute
88 /// '__attribute__' '(' '(' attribute-list ')' ')'
90 /// [GNU] attribute-list:
92 /// attribute_list ',' attrib
97 /// attrib-name '(' identifier ')'
98 /// attrib-name '(' identifier ',' nonempty-expr-list ')'
99 /// attrib-name '(' argument-expression-list [C99 6.5.2] ')'
101 /// [GNU] attrib-name:
107 /// Whether an attribute takes an 'identifier' is determined by the
108 /// attrib-name. GCC's behavior here is not worth imitating:
110 /// * In C mode, if the attribute argument list starts with an identifier
111 /// followed by a ',' or an ')', and the identifier doesn't resolve to
112 /// a type, it is parsed as an identifier. If the attribute actually
113 /// wanted an expression, it's out of luck (but it turns out that no
114 /// attributes work that way, because C constant expressions are very
116 /// * In C++ mode, if the attribute argument list starts with an identifier,
117 /// and the attribute *wants* an identifier, it is parsed as an identifier.
118 /// At block scope, any additional tokens between the identifier and the
119 /// ',' or ')' are ignored, otherwise they produce a parse error.
121 /// We follow the C++ model, but don't allow junk after the identifier.
122 void Parser::ParseGNUAttributes(ParsedAttributes &attrs,
123 SourceLocation *endLoc,
124 LateParsedAttrList *LateAttrs,
126 assert(Tok.is(tok::kw___attribute) && "Not a GNU attribute list!");
128 while (Tok.is(tok::kw___attribute)) {
130 if (ExpectAndConsume(tok::l_paren, diag::err_expected_lparen_after,
132 SkipUntil(tok::r_paren, StopAtSemi); // skip until ) or ;
135 if (ExpectAndConsume(tok::l_paren, diag::err_expected_lparen_after, "(")) {
136 SkipUntil(tok::r_paren, StopAtSemi); // skip until ) or ;
139 // Parse the attribute-list. e.g. __attribute__(( weak, alias("__f") ))
141 // Allow empty/non-empty attributes. ((__vector_size__(16),,,,))
142 if (TryConsumeToken(tok::comma))
145 // Expect an identifier or declaration specifier (const, int, etc.)
146 if (Tok.isAnnotation())
148 IdentifierInfo *AttrName = Tok.getIdentifierInfo();
152 SourceLocation AttrNameLoc = ConsumeToken();
154 if (Tok.isNot(tok::l_paren)) {
155 attrs.addNew(AttrName, AttrNameLoc, nullptr, AttrNameLoc, nullptr, 0,
156 AttributeList::AS_GNU);
160 // Handle "parameterized" attributes
161 if (!LateAttrs || !isAttributeLateParsed(*AttrName)) {
162 ParseGNUAttributeArgs(AttrName, AttrNameLoc, attrs, endLoc, nullptr,
163 SourceLocation(), AttributeList::AS_GNU, D);
167 // Handle attributes with arguments that require late parsing.
168 LateParsedAttribute *LA =
169 new LateParsedAttribute(this, *AttrName, AttrNameLoc);
170 LateAttrs->push_back(LA);
172 // Attributes in a class are parsed at the end of the class, along
173 // with other late-parsed declarations.
174 if (!ClassStack.empty() && !LateAttrs->parseSoon())
175 getCurrentClass().LateParsedDeclarations.push_back(LA);
177 // consume everything up to and including the matching right parens
178 ConsumeAndStoreUntil(tok::r_paren, LA->Toks, true, false);
182 Eof.setLocation(Tok.getLocation());
183 LA->Toks.push_back(Eof);
186 if (ExpectAndConsume(tok::r_paren))
187 SkipUntil(tok::r_paren, StopAtSemi);
188 SourceLocation Loc = Tok.getLocation();
189 if (ExpectAndConsume(tok::r_paren))
190 SkipUntil(tok::r_paren, StopAtSemi);
196 /// \brief Normalizes an attribute name by dropping prefixed and suffixed __.
197 static StringRef normalizeAttrName(StringRef Name) {
198 if (Name.size() >= 4 && Name.startswith("__") && Name.endswith("__"))
199 Name = Name.drop_front(2).drop_back(2);
203 /// \brief Determine whether the given attribute has an identifier argument.
204 static bool attributeHasIdentifierArg(const IdentifierInfo &II) {
205 #define CLANG_ATTR_IDENTIFIER_ARG_LIST
206 return llvm::StringSwitch<bool>(normalizeAttrName(II.getName()))
207 #include "clang/Parse/AttrParserStringSwitches.inc"
209 #undef CLANG_ATTR_IDENTIFIER_ARG_LIST
212 /// \brief Determine whether the given attribute parses a type argument.
213 static bool attributeIsTypeArgAttr(const IdentifierInfo &II) {
214 #define CLANG_ATTR_TYPE_ARG_LIST
215 return llvm::StringSwitch<bool>(normalizeAttrName(II.getName()))
216 #include "clang/Parse/AttrParserStringSwitches.inc"
218 #undef CLANG_ATTR_TYPE_ARG_LIST
221 /// \brief Determine whether the given attribute requires parsing its arguments
222 /// in an unevaluated context or not.
223 static bool attributeParsedArgsUnevaluated(const IdentifierInfo &II) {
224 #define CLANG_ATTR_ARG_CONTEXT_LIST
225 return llvm::StringSwitch<bool>(normalizeAttrName(II.getName()))
226 #include "clang/Parse/AttrParserStringSwitches.inc"
228 #undef CLANG_ATTR_ARG_CONTEXT_LIST
231 IdentifierLoc *Parser::ParseIdentifierLoc() {
232 assert(Tok.is(tok::identifier) && "expected an identifier");
233 IdentifierLoc *IL = IdentifierLoc::create(Actions.Context,
235 Tok.getIdentifierInfo());
240 void Parser::ParseAttributeWithTypeArg(IdentifierInfo &AttrName,
241 SourceLocation AttrNameLoc,
242 ParsedAttributes &Attrs,
243 SourceLocation *EndLoc,
244 IdentifierInfo *ScopeName,
245 SourceLocation ScopeLoc,
246 AttributeList::Syntax Syntax) {
247 BalancedDelimiterTracker Parens(*this, tok::l_paren);
248 Parens.consumeOpen();
251 if (Tok.isNot(tok::r_paren))
254 if (Parens.consumeClose())
261 Attrs.addNewTypeAttr(&AttrName,
262 SourceRange(AttrNameLoc, Parens.getCloseLocation()),
263 ScopeName, ScopeLoc, T.get(), Syntax);
265 Attrs.addNew(&AttrName, SourceRange(AttrNameLoc, Parens.getCloseLocation()),
266 ScopeName, ScopeLoc, nullptr, 0, Syntax);
269 unsigned Parser::ParseAttributeArgsCommon(
270 IdentifierInfo *AttrName, SourceLocation AttrNameLoc,
271 ParsedAttributes &Attrs, SourceLocation *EndLoc, IdentifierInfo *ScopeName,
272 SourceLocation ScopeLoc, AttributeList::Syntax Syntax) {
273 // Ignore the left paren location for now.
277 if (Tok.is(tok::identifier)) {
278 // If this attribute wants an 'identifier' argument, make it so.
279 bool IsIdentifierArg = attributeHasIdentifierArg(*AttrName);
280 AttributeList::Kind AttrKind =
281 AttributeList::getKind(AttrName, ScopeName, Syntax);
283 // If we don't know how to parse this attribute, but this is the only
284 // token in this argument, assume it's meant to be an identifier.
285 if (AttrKind == AttributeList::UnknownAttribute ||
286 AttrKind == AttributeList::IgnoredAttribute) {
287 const Token &Next = NextToken();
288 IsIdentifierArg = Next.isOneOf(tok::r_paren, tok::comma);
292 ArgExprs.push_back(ParseIdentifierLoc());
295 if (!ArgExprs.empty() ? Tok.is(tok::comma) : Tok.isNot(tok::r_paren)) {
297 if (!ArgExprs.empty())
300 // Parse the non-empty comma-separated list of expressions.
302 std::unique_ptr<EnterExpressionEvaluationContext> Unevaluated;
303 if (attributeParsedArgsUnevaluated(*AttrName))
305 new EnterExpressionEvaluationContext(Actions, Sema::Unevaluated));
308 Actions.CorrectDelayedTyposInExpr(ParseAssignmentExpression()));
309 if (ArgExpr.isInvalid()) {
310 SkipUntil(tok::r_paren, StopAtSemi);
313 ArgExprs.push_back(ArgExpr.get());
314 // Eat the comma, move to the next argument
315 } while (TryConsumeToken(tok::comma));
318 SourceLocation RParen = Tok.getLocation();
319 if (!ExpectAndConsume(tok::r_paren)) {
320 SourceLocation AttrLoc = ScopeLoc.isValid() ? ScopeLoc : AttrNameLoc;
321 Attrs.addNew(AttrName, SourceRange(AttrLoc, RParen), ScopeName, ScopeLoc,
322 ArgExprs.data(), ArgExprs.size(), Syntax);
328 return static_cast<unsigned>(ArgExprs.size());
331 /// Parse the arguments to a parameterized GNU attribute or
332 /// a C++11 attribute in "gnu" namespace.
333 void Parser::ParseGNUAttributeArgs(IdentifierInfo *AttrName,
334 SourceLocation AttrNameLoc,
335 ParsedAttributes &Attrs,
336 SourceLocation *EndLoc,
337 IdentifierInfo *ScopeName,
338 SourceLocation ScopeLoc,
339 AttributeList::Syntax Syntax,
342 assert(Tok.is(tok::l_paren) && "Attribute arg list not starting with '('");
344 AttributeList::Kind AttrKind =
345 AttributeList::getKind(AttrName, ScopeName, Syntax);
347 if (AttrKind == AttributeList::AT_Availability) {
348 ParseAvailabilityAttribute(*AttrName, AttrNameLoc, Attrs, EndLoc, ScopeName,
351 } else if (AttrKind == AttributeList::AT_ObjCBridgeRelated) {
352 ParseObjCBridgeRelatedAttribute(*AttrName, AttrNameLoc, Attrs, EndLoc,
353 ScopeName, ScopeLoc, Syntax);
355 } else if (AttrKind == AttributeList::AT_TypeTagForDatatype) {
356 ParseTypeTagForDatatypeAttribute(*AttrName, AttrNameLoc, Attrs, EndLoc,
357 ScopeName, ScopeLoc, Syntax);
359 } else if (attributeIsTypeArgAttr(*AttrName)) {
360 ParseAttributeWithTypeArg(*AttrName, AttrNameLoc, Attrs, EndLoc, ScopeName,
365 // These may refer to the function arguments, but need to be parsed early to
366 // participate in determining whether it's a redeclaration.
367 std::unique_ptr<ParseScope> PrototypeScope;
368 if (AttrName->isStr("enable_if") && D && D->isFunctionDeclarator()) {
369 DeclaratorChunk::FunctionTypeInfo FTI = D->getFunctionTypeInfo();
370 PrototypeScope.reset(new ParseScope(this, Scope::FunctionPrototypeScope |
371 Scope::FunctionDeclarationScope |
373 for (unsigned i = 0; i != FTI.NumParams; ++i) {
374 ParmVarDecl *Param = cast<ParmVarDecl>(FTI.Params[i].Param);
375 Actions.ActOnReenterCXXMethodParameter(getCurScope(), Param);
379 ParseAttributeArgsCommon(AttrName, AttrNameLoc, Attrs, EndLoc, ScopeName,
383 bool Parser::ParseMicrosoftDeclSpecArgs(IdentifierInfo *AttrName,
384 SourceLocation AttrNameLoc,
385 ParsedAttributes &Attrs) {
386 // If the attribute isn't known, we will not attempt to parse any
388 if (!hasAttribute(AttrSyntax::Declspec, nullptr, AttrName,
389 getTargetInfo().getTriple(), getLangOpts())) {
390 // Eat the left paren, then skip to the ending right paren.
392 SkipUntil(tok::r_paren);
396 SourceLocation OpenParenLoc = Tok.getLocation();
398 if (AttrName->getName() == "property") {
399 // The property declspec is more complex in that it can take one or two
400 // assignment expressions as a parameter, but the lhs of the assignment
401 // must be named get or put.
403 BalancedDelimiterTracker T(*this, tok::l_paren);
404 T.expectAndConsume(diag::err_expected_lparen_after,
405 AttrName->getNameStart(), tok::r_paren);
410 AK_Get = 1 // indices into AccessorNames
412 IdentifierInfo *AccessorNames[] = {nullptr, nullptr};
413 bool HasInvalidAccessor = false;
415 // Parse the accessor specifications.
417 // Stop if this doesn't look like an accessor spec.
418 if (!Tok.is(tok::identifier)) {
419 // If the user wrote a completely empty list, use a special diagnostic.
420 if (Tok.is(tok::r_paren) && !HasInvalidAccessor &&
421 AccessorNames[AK_Put] == nullptr &&
422 AccessorNames[AK_Get] == nullptr) {
423 Diag(AttrNameLoc, diag::err_ms_property_no_getter_or_putter);
427 Diag(Tok.getLocation(), diag::err_ms_property_unknown_accessor);
432 SourceLocation KindLoc = Tok.getLocation();
433 StringRef KindStr = Tok.getIdentifierInfo()->getName();
434 if (KindStr == "get") {
436 } else if (KindStr == "put") {
439 // Recover from the common mistake of using 'set' instead of 'put'.
440 } else if (KindStr == "set") {
441 Diag(KindLoc, diag::err_ms_property_has_set_accessor)
442 << FixItHint::CreateReplacement(KindLoc, "put");
445 // Handle the mistake of forgetting the accessor kind by skipping
447 } else if (NextToken().is(tok::comma) || NextToken().is(tok::r_paren)) {
448 Diag(KindLoc, diag::err_ms_property_missing_accessor_kind);
450 HasInvalidAccessor = true;
451 goto next_property_accessor;
453 // Otherwise, complain about the unknown accessor kind.
455 Diag(KindLoc, diag::err_ms_property_unknown_accessor);
456 HasInvalidAccessor = true;
459 // Try to keep parsing unless it doesn't look like an accessor spec.
460 if (!NextToken().is(tok::equal))
464 // Consume the identifier.
468 if (!TryConsumeToken(tok::equal)) {
469 Diag(Tok.getLocation(), diag::err_ms_property_expected_equal)
474 // Expect the method name.
475 if (!Tok.is(tok::identifier)) {
476 Diag(Tok.getLocation(), diag::err_ms_property_expected_accessor_name);
480 if (Kind == AK_Invalid) {
481 // Just drop invalid accessors.
482 } else if (AccessorNames[Kind] != nullptr) {
483 // Complain about the repeated accessor, ignore it, and keep parsing.
484 Diag(KindLoc, diag::err_ms_property_duplicate_accessor) << KindStr;
486 AccessorNames[Kind] = Tok.getIdentifierInfo();
490 next_property_accessor:
491 // Keep processing accessors until we run out.
492 if (TryConsumeToken(tok::comma))
495 // If we run into the ')', stop without consuming it.
496 if (Tok.is(tok::r_paren))
499 Diag(Tok.getLocation(), diag::err_ms_property_expected_comma_or_rparen);
503 // Only add the property attribute if it was well-formed.
504 if (!HasInvalidAccessor)
505 Attrs.addNewPropertyAttr(AttrName, AttrNameLoc, nullptr, SourceLocation(),
506 AccessorNames[AK_Get], AccessorNames[AK_Put],
507 AttributeList::AS_Declspec);
509 return !HasInvalidAccessor;
513 ParseAttributeArgsCommon(AttrName, AttrNameLoc, Attrs, nullptr, nullptr,
514 SourceLocation(), AttributeList::AS_Declspec);
516 // If this attribute's args were parsed, and it was expected to have
517 // arguments but none were provided, emit a diagnostic.
518 const AttributeList *Attr = Attrs.getList();
519 if (Attr && Attr->getMaxArgs() && !NumArgs) {
520 Diag(OpenParenLoc, diag::err_attribute_requires_arguments) << AttrName;
526 /// [MS] decl-specifier:
527 /// __declspec ( extended-decl-modifier-seq )
529 /// [MS] extended-decl-modifier-seq:
530 /// extended-decl-modifier[opt]
531 /// extended-decl-modifier extended-decl-modifier-seq
532 void Parser::ParseMicrosoftDeclSpecs(ParsedAttributes &Attrs,
533 SourceLocation *End) {
534 assert((getLangOpts().MicrosoftExt || getLangOpts().Borland ||
535 getLangOpts().CUDA) &&
536 "Incorrect language options for parsing __declspec");
537 assert(Tok.is(tok::kw___declspec) && "Not a declspec!");
539 while (Tok.is(tok::kw___declspec)) {
541 BalancedDelimiterTracker T(*this, tok::l_paren);
542 if (T.expectAndConsume(diag::err_expected_lparen_after, "__declspec",
546 // An empty declspec is perfectly legal and should not warn. Additionally,
547 // you can specify multiple attributes per declspec.
548 while (Tok.isNot(tok::r_paren)) {
549 // Attribute not present.
550 if (TryConsumeToken(tok::comma))
553 // We expect either a well-known identifier or a generic string. Anything
554 // else is a malformed declspec.
555 bool IsString = Tok.getKind() == tok::string_literal;
556 if (!IsString && Tok.getKind() != tok::identifier &&
557 Tok.getKind() != tok::kw_restrict) {
558 Diag(Tok, diag::err_ms_declspec_type);
563 IdentifierInfo *AttrName;
564 SourceLocation AttrNameLoc;
566 SmallString<8> StrBuffer;
567 bool Invalid = false;
568 StringRef Str = PP.getSpelling(Tok, StrBuffer, &Invalid);
573 AttrName = PP.getIdentifierInfo(Str);
574 AttrNameLoc = ConsumeStringToken();
576 AttrName = Tok.getIdentifierInfo();
577 AttrNameLoc = ConsumeToken();
580 bool AttrHandled = false;
582 // Parse attribute arguments.
583 if (Tok.is(tok::l_paren))
584 AttrHandled = ParseMicrosoftDeclSpecArgs(AttrName, AttrNameLoc, Attrs);
585 else if (AttrName->getName() == "property")
586 // The property attribute must have an argument list.
587 Diag(Tok.getLocation(), diag::err_expected_lparen_after)
588 << AttrName->getName();
591 Attrs.addNew(AttrName, AttrNameLoc, nullptr, AttrNameLoc, nullptr, 0,
592 AttributeList::AS_Declspec);
596 *End = T.getCloseLocation();
600 void Parser::ParseMicrosoftTypeAttributes(ParsedAttributes &attrs) {
601 // Treat these like attributes
603 switch (Tok.getKind()) {
604 case tok::kw___fastcall:
605 case tok::kw___stdcall:
606 case tok::kw___thiscall:
607 case tok::kw___cdecl:
608 case tok::kw___vectorcall:
609 case tok::kw___ptr64:
611 case tok::kw___ptr32:
612 case tok::kw___unaligned:
614 case tok::kw___uptr: {
615 IdentifierInfo *AttrName = Tok.getIdentifierInfo();
616 SourceLocation AttrNameLoc = ConsumeToken();
617 attrs.addNew(AttrName, AttrNameLoc, nullptr, AttrNameLoc, nullptr, 0,
618 AttributeList::AS_Keyword);
627 void Parser::DiagnoseAndSkipExtendedMicrosoftTypeAttributes() {
628 SourceLocation StartLoc = Tok.getLocation();
629 SourceLocation EndLoc = SkipExtendedMicrosoftTypeAttributes();
631 if (EndLoc.isValid()) {
632 SourceRange Range(StartLoc, EndLoc);
633 Diag(StartLoc, diag::warn_microsoft_qualifiers_ignored) << Range;
637 SourceLocation Parser::SkipExtendedMicrosoftTypeAttributes() {
638 SourceLocation EndLoc;
641 switch (Tok.getKind()) {
643 case tok::kw_volatile:
644 case tok::kw___fastcall:
645 case tok::kw___stdcall:
646 case tok::kw___thiscall:
647 case tok::kw___cdecl:
648 case tok::kw___vectorcall:
649 case tok::kw___ptr32:
650 case tok::kw___ptr64:
652 case tok::kw___unaligned:
655 EndLoc = ConsumeToken();
663 void Parser::ParseBorlandTypeAttributes(ParsedAttributes &attrs) {
664 // Treat these like attributes
665 while (Tok.is(tok::kw___pascal)) {
666 IdentifierInfo *AttrName = Tok.getIdentifierInfo();
667 SourceLocation AttrNameLoc = ConsumeToken();
668 attrs.addNew(AttrName, AttrNameLoc, nullptr, AttrNameLoc, nullptr, 0,
669 AttributeList::AS_Keyword);
673 void Parser::ParseOpenCLAttributes(ParsedAttributes &attrs) {
674 // Treat these like attributes
675 while (Tok.is(tok::kw___kernel)) {
676 IdentifierInfo *AttrName = Tok.getIdentifierInfo();
677 SourceLocation AttrNameLoc = ConsumeToken();
678 attrs.addNew(AttrName, AttrNameLoc, nullptr, AttrNameLoc, nullptr, 0,
679 AttributeList::AS_Keyword);
683 void Parser::ParseOpenCLQualifiers(ParsedAttributes &Attrs) {
684 IdentifierInfo *AttrName = Tok.getIdentifierInfo();
685 SourceLocation AttrNameLoc = Tok.getLocation();
686 Attrs.addNew(AttrName, AttrNameLoc, nullptr, AttrNameLoc, nullptr, 0,
687 AttributeList::AS_Keyword);
690 void Parser::ParseNullabilityTypeSpecifiers(ParsedAttributes &attrs) {
691 // Treat these like attributes, even though they're type specifiers.
693 switch (Tok.getKind()) {
694 case tok::kw___nonnull:
695 case tok::kw___nullable:
696 case tok::kw___null_unspecified: {
697 IdentifierInfo *AttrName = Tok.getIdentifierInfo();
698 SourceLocation AttrNameLoc = ConsumeToken();
699 if (!getLangOpts().ObjC1)
700 Diag(AttrNameLoc, diag::ext_nullability)
702 attrs.addNew(AttrName, AttrNameLoc, nullptr, AttrNameLoc, nullptr, 0,
703 AttributeList::AS_Keyword);
712 static bool VersionNumberSeparator(const char Separator) {
713 return (Separator == '.' || Separator == '_');
716 /// \brief Parse a version number.
720 /// simple-integer ',' simple-integer
721 /// simple-integer ',' simple-integer ',' simple-integer
722 VersionTuple Parser::ParseVersionTuple(SourceRange &Range) {
723 Range = Tok.getLocation();
725 if (!Tok.is(tok::numeric_constant)) {
726 Diag(Tok, diag::err_expected_version);
727 SkipUntil(tok::comma, tok::r_paren,
728 StopAtSemi | StopBeforeMatch | StopAtCodeCompletion);
729 return VersionTuple();
732 // Parse the major (and possibly minor and subminor) versions, which
733 // are stored in the numeric constant. We utilize a quirk of the
734 // lexer, which is that it handles something like 1.2.3 as a single
735 // numeric constant, rather than two separate tokens.
736 SmallString<512> Buffer;
737 Buffer.resize(Tok.getLength()+1);
738 const char *ThisTokBegin = &Buffer[0];
740 // Get the spelling of the token, which eliminates trigraphs, etc.
741 bool Invalid = false;
742 unsigned ActualLength = PP.getSpelling(Tok, ThisTokBegin, &Invalid);
744 return VersionTuple();
746 // Parse the major version.
747 unsigned AfterMajor = 0;
749 while (AfterMajor < ActualLength && isDigit(ThisTokBegin[AfterMajor])) {
750 Major = Major * 10 + ThisTokBegin[AfterMajor] - '0';
754 if (AfterMajor == 0) {
755 Diag(Tok, diag::err_expected_version);
756 SkipUntil(tok::comma, tok::r_paren,
757 StopAtSemi | StopBeforeMatch | StopAtCodeCompletion);
758 return VersionTuple();
761 if (AfterMajor == ActualLength) {
764 // We only had a single version component.
766 Diag(Tok, diag::err_zero_version);
767 return VersionTuple();
770 return VersionTuple(Major);
773 const char AfterMajorSeparator = ThisTokBegin[AfterMajor];
774 if (!VersionNumberSeparator(AfterMajorSeparator)
775 || (AfterMajor + 1 == ActualLength)) {
776 Diag(Tok, diag::err_expected_version);
777 SkipUntil(tok::comma, tok::r_paren,
778 StopAtSemi | StopBeforeMatch | StopAtCodeCompletion);
779 return VersionTuple();
782 // Parse the minor version.
783 unsigned AfterMinor = AfterMajor + 1;
785 while (AfterMinor < ActualLength && isDigit(ThisTokBegin[AfterMinor])) {
786 Minor = Minor * 10 + ThisTokBegin[AfterMinor] - '0';
790 if (AfterMinor == ActualLength) {
793 // We had major.minor.
794 if (Major == 0 && Minor == 0) {
795 Diag(Tok, diag::err_zero_version);
796 return VersionTuple();
799 return VersionTuple(Major, Minor, (AfterMajorSeparator == '_'));
802 const char AfterMinorSeparator = ThisTokBegin[AfterMinor];
803 // If what follows is not a '.' or '_', we have a problem.
804 if (!VersionNumberSeparator(AfterMinorSeparator)) {
805 Diag(Tok, diag::err_expected_version);
806 SkipUntil(tok::comma, tok::r_paren,
807 StopAtSemi | StopBeforeMatch | StopAtCodeCompletion);
808 return VersionTuple();
811 // Warn if separators, be it '.' or '_', do not match.
812 if (AfterMajorSeparator != AfterMinorSeparator)
813 Diag(Tok, diag::warn_expected_consistent_version_separator);
815 // Parse the subminor version.
816 unsigned AfterSubminor = AfterMinor + 1;
817 unsigned Subminor = 0;
818 while (AfterSubminor < ActualLength && isDigit(ThisTokBegin[AfterSubminor])) {
819 Subminor = Subminor * 10 + ThisTokBegin[AfterSubminor] - '0';
823 if (AfterSubminor != ActualLength) {
824 Diag(Tok, diag::err_expected_version);
825 SkipUntil(tok::comma, tok::r_paren,
826 StopAtSemi | StopBeforeMatch | StopAtCodeCompletion);
827 return VersionTuple();
830 return VersionTuple(Major, Minor, Subminor, (AfterMajorSeparator == '_'));
833 /// \brief Parse the contents of the "availability" attribute.
835 /// availability-attribute:
836 /// 'availability' '(' platform ',' version-arg-list, opt-message')'
841 /// version-arg-list:
843 /// version-arg ',' version-arg-list
846 /// 'introduced' '=' version
847 /// 'deprecated' '=' version
848 /// 'obsoleted' = version
851 /// 'message' '=' <string>
852 void Parser::ParseAvailabilityAttribute(IdentifierInfo &Availability,
853 SourceLocation AvailabilityLoc,
854 ParsedAttributes &attrs,
855 SourceLocation *endLoc,
856 IdentifierInfo *ScopeName,
857 SourceLocation ScopeLoc,
858 AttributeList::Syntax Syntax) {
859 enum { Introduced, Deprecated, Obsoleted, Unknown };
860 AvailabilityChange Changes[Unknown];
861 ExprResult MessageExpr;
864 BalancedDelimiterTracker T(*this, tok::l_paren);
865 if (T.consumeOpen()) {
866 Diag(Tok, diag::err_expected) << tok::l_paren;
870 // Parse the platform name,
871 if (Tok.isNot(tok::identifier)) {
872 Diag(Tok, diag::err_availability_expected_platform);
873 SkipUntil(tok::r_paren, StopAtSemi);
876 IdentifierLoc *Platform = ParseIdentifierLoc();
878 // Parse the ',' following the platform name.
879 if (ExpectAndConsume(tok::comma)) {
880 SkipUntil(tok::r_paren, StopAtSemi);
884 // If we haven't grabbed the pointers for the identifiers
885 // "introduced", "deprecated", and "obsoleted", do so now.
886 if (!Ident_introduced) {
887 Ident_introduced = PP.getIdentifierInfo("introduced");
888 Ident_deprecated = PP.getIdentifierInfo("deprecated");
889 Ident_obsoleted = PP.getIdentifierInfo("obsoleted");
890 Ident_unavailable = PP.getIdentifierInfo("unavailable");
891 Ident_message = PP.getIdentifierInfo("message");
894 // Parse the set of introductions/deprecations/removals.
895 SourceLocation UnavailableLoc;
897 if (Tok.isNot(tok::identifier)) {
898 Diag(Tok, diag::err_availability_expected_change);
899 SkipUntil(tok::r_paren, StopAtSemi);
902 IdentifierInfo *Keyword = Tok.getIdentifierInfo();
903 SourceLocation KeywordLoc = ConsumeToken();
905 if (Keyword == Ident_unavailable) {
906 if (UnavailableLoc.isValid()) {
907 Diag(KeywordLoc, diag::err_availability_redundant)
908 << Keyword << SourceRange(UnavailableLoc);
910 UnavailableLoc = KeywordLoc;
914 if (Tok.isNot(tok::equal)) {
915 Diag(Tok, diag::err_expected_after) << Keyword << tok::equal;
916 SkipUntil(tok::r_paren, StopAtSemi);
920 if (Keyword == Ident_message) {
921 if (Tok.isNot(tok::string_literal)) {
922 Diag(Tok, diag::err_expected_string_literal)
923 << /*Source='availability attribute'*/2;
924 SkipUntil(tok::r_paren, StopAtSemi);
927 MessageExpr = ParseStringLiteralExpression();
928 // Also reject wide string literals.
929 if (StringLiteral *MessageStringLiteral =
930 cast_or_null<StringLiteral>(MessageExpr.get())) {
931 if (MessageStringLiteral->getCharByteWidth() != 1) {
932 Diag(MessageStringLiteral->getSourceRange().getBegin(),
933 diag::err_expected_string_literal)
934 << /*Source='availability attribute'*/ 2;
935 SkipUntil(tok::r_paren, StopAtSemi);
942 // Special handling of 'NA' only when applied to introduced or
944 if ((Keyword == Ident_introduced || Keyword == Ident_deprecated) &&
945 Tok.is(tok::identifier)) {
946 IdentifierInfo *NA = Tok.getIdentifierInfo();
947 if (NA->getName() == "NA") {
949 if (Keyword == Ident_introduced)
950 UnavailableLoc = KeywordLoc;
955 SourceRange VersionRange;
956 VersionTuple Version = ParseVersionTuple(VersionRange);
958 if (Version.empty()) {
959 SkipUntil(tok::r_paren, StopAtSemi);
964 if (Keyword == Ident_introduced)
966 else if (Keyword == Ident_deprecated)
968 else if (Keyword == Ident_obsoleted)
973 if (Index < Unknown) {
974 if (!Changes[Index].KeywordLoc.isInvalid()) {
975 Diag(KeywordLoc, diag::err_availability_redundant)
977 << SourceRange(Changes[Index].KeywordLoc,
978 Changes[Index].VersionRange.getEnd());
981 Changes[Index].KeywordLoc = KeywordLoc;
982 Changes[Index].Version = Version;
983 Changes[Index].VersionRange = VersionRange;
985 Diag(KeywordLoc, diag::err_availability_unknown_change)
986 << Keyword << VersionRange;
989 } while (TryConsumeToken(tok::comma));
992 if (T.consumeClose())
996 *endLoc = T.getCloseLocation();
998 // The 'unavailable' availability cannot be combined with any other
999 // availability changes. Make sure that hasn't happened.
1000 if (UnavailableLoc.isValid()) {
1001 bool Complained = false;
1002 for (unsigned Index = Introduced; Index != Unknown; ++Index) {
1003 if (Changes[Index].KeywordLoc.isValid()) {
1005 Diag(UnavailableLoc, diag::warn_availability_and_unavailable)
1006 << SourceRange(Changes[Index].KeywordLoc,
1007 Changes[Index].VersionRange.getEnd());
1011 // Clear out the availability.
1012 Changes[Index] = AvailabilityChange();
1017 // Record this attribute
1018 attrs.addNew(&Availability,
1019 SourceRange(AvailabilityLoc, T.getCloseLocation()),
1020 ScopeName, ScopeLoc,
1022 Changes[Introduced],
1023 Changes[Deprecated],
1025 UnavailableLoc, MessageExpr.get(),
1029 /// \brief Parse the contents of the "objc_bridge_related" attribute.
1030 /// objc_bridge_related '(' related_class ',' opt-class_method ',' opt-instance_method ')'
1034 /// opt-class_method:
1035 /// Identifier: | <empty>
1037 /// opt-instance_method:
1038 /// Identifier | <empty>
1040 void Parser::ParseObjCBridgeRelatedAttribute(IdentifierInfo &ObjCBridgeRelated,
1041 SourceLocation ObjCBridgeRelatedLoc,
1042 ParsedAttributes &attrs,
1043 SourceLocation *endLoc,
1044 IdentifierInfo *ScopeName,
1045 SourceLocation ScopeLoc,
1046 AttributeList::Syntax Syntax) {
1048 BalancedDelimiterTracker T(*this, tok::l_paren);
1049 if (T.consumeOpen()) {
1050 Diag(Tok, diag::err_expected) << tok::l_paren;
1054 // Parse the related class name.
1055 if (Tok.isNot(tok::identifier)) {
1056 Diag(Tok, diag::err_objcbridge_related_expected_related_class);
1057 SkipUntil(tok::r_paren, StopAtSemi);
1060 IdentifierLoc *RelatedClass = ParseIdentifierLoc();
1061 if (ExpectAndConsume(tok::comma)) {
1062 SkipUntil(tok::r_paren, StopAtSemi);
1066 // Parse optional class method name.
1067 IdentifierLoc *ClassMethod = nullptr;
1068 if (Tok.is(tok::identifier)) {
1069 ClassMethod = ParseIdentifierLoc();
1070 if (!TryConsumeToken(tok::colon)) {
1071 Diag(Tok, diag::err_objcbridge_related_selector_name);
1072 SkipUntil(tok::r_paren, StopAtSemi);
1076 if (!TryConsumeToken(tok::comma)) {
1077 if (Tok.is(tok::colon))
1078 Diag(Tok, diag::err_objcbridge_related_selector_name);
1080 Diag(Tok, diag::err_expected) << tok::comma;
1081 SkipUntil(tok::r_paren, StopAtSemi);
1085 // Parse optional instance method name.
1086 IdentifierLoc *InstanceMethod = nullptr;
1087 if (Tok.is(tok::identifier))
1088 InstanceMethod = ParseIdentifierLoc();
1089 else if (Tok.isNot(tok::r_paren)) {
1090 Diag(Tok, diag::err_expected) << tok::r_paren;
1091 SkipUntil(tok::r_paren, StopAtSemi);
1096 if (T.consumeClose())
1100 *endLoc = T.getCloseLocation();
1102 // Record this attribute
1103 attrs.addNew(&ObjCBridgeRelated,
1104 SourceRange(ObjCBridgeRelatedLoc, T.getCloseLocation()),
1105 ScopeName, ScopeLoc,
1112 // Late Parsed Attributes:
1113 // See other examples of late parsing in lib/Parse/ParseCXXInlineMethods
1115 void Parser::LateParsedDeclaration::ParseLexedAttributes() {}
1117 void Parser::LateParsedClass::ParseLexedAttributes() {
1118 Self->ParseLexedAttributes(*Class);
1121 void Parser::LateParsedAttribute::ParseLexedAttributes() {
1122 Self->ParseLexedAttribute(*this, true, false);
1125 /// Wrapper class which calls ParseLexedAttribute, after setting up the
1126 /// scope appropriately.
1127 void Parser::ParseLexedAttributes(ParsingClass &Class) {
1128 // Deal with templates
1129 // FIXME: Test cases to make sure this does the right thing for templates.
1130 bool HasTemplateScope = !Class.TopLevelClass && Class.TemplateScope;
1131 ParseScope ClassTemplateScope(this, Scope::TemplateParamScope,
1133 if (HasTemplateScope)
1134 Actions.ActOnReenterTemplateScope(getCurScope(), Class.TagOrTemplate);
1136 // Set or update the scope flags.
1137 bool AlreadyHasClassScope = Class.TopLevelClass;
1138 unsigned ScopeFlags = Scope::ClassScope|Scope::DeclScope;
1139 ParseScope ClassScope(this, ScopeFlags, !AlreadyHasClassScope);
1140 ParseScopeFlags ClassScopeFlags(this, ScopeFlags, AlreadyHasClassScope);
1142 // Enter the scope of nested classes
1143 if (!AlreadyHasClassScope)
1144 Actions.ActOnStartDelayedMemberDeclarations(getCurScope(),
1145 Class.TagOrTemplate);
1146 if (!Class.LateParsedDeclarations.empty()) {
1147 for (unsigned i = 0, ni = Class.LateParsedDeclarations.size(); i < ni; ++i){
1148 Class.LateParsedDeclarations[i]->ParseLexedAttributes();
1152 if (!AlreadyHasClassScope)
1153 Actions.ActOnFinishDelayedMemberDeclarations(getCurScope(),
1154 Class.TagOrTemplate);
1158 /// \brief Parse all attributes in LAs, and attach them to Decl D.
1159 void Parser::ParseLexedAttributeList(LateParsedAttrList &LAs, Decl *D,
1160 bool EnterScope, bool OnDefinition) {
1161 assert(LAs.parseSoon() &&
1162 "Attribute list should be marked for immediate parsing.");
1163 for (unsigned i = 0, ni = LAs.size(); i < ni; ++i) {
1166 ParseLexedAttribute(*LAs[i], EnterScope, OnDefinition);
1173 /// \brief Finish parsing an attribute for which parsing was delayed.
1174 /// This will be called at the end of parsing a class declaration
1175 /// for each LateParsedAttribute. We consume the saved tokens and
1176 /// create an attribute with the arguments filled in. We add this
1177 /// to the Attribute list for the decl.
1178 void Parser::ParseLexedAttribute(LateParsedAttribute &LA,
1179 bool EnterScope, bool OnDefinition) {
1180 // Create a fake EOF so that attribute parsing won't go off the end of the
1183 AttrEnd.startToken();
1184 AttrEnd.setKind(tok::eof);
1185 AttrEnd.setLocation(Tok.getLocation());
1186 AttrEnd.setEofData(LA.Toks.data());
1187 LA.Toks.push_back(AttrEnd);
1189 // Append the current token at the end of the new token stream so that it
1190 // doesn't get lost.
1191 LA.Toks.push_back(Tok);
1192 PP.EnterTokenStream(LA.Toks.data(), LA.Toks.size(), true, false);
1193 // Consume the previously pushed token.
1194 ConsumeAnyToken(/*ConsumeCodeCompletionTok=*/true);
1196 ParsedAttributes Attrs(AttrFactory);
1197 SourceLocation endLoc;
1199 if (LA.Decls.size() > 0) {
1200 Decl *D = LA.Decls[0];
1201 NamedDecl *ND = dyn_cast<NamedDecl>(D);
1202 RecordDecl *RD = dyn_cast_or_null<RecordDecl>(D->getDeclContext());
1204 // Allow 'this' within late-parsed attributes.
1205 Sema::CXXThisScopeRAII ThisScope(Actions, RD, /*TypeQuals=*/0,
1206 ND && ND->isCXXInstanceMember());
1208 if (LA.Decls.size() == 1) {
1209 // If the Decl is templatized, add template parameters to scope.
1210 bool HasTemplateScope = EnterScope && D->isTemplateDecl();
1211 ParseScope TempScope(this, Scope::TemplateParamScope, HasTemplateScope);
1212 if (HasTemplateScope)
1213 Actions.ActOnReenterTemplateScope(Actions.CurScope, D);
1215 // If the Decl is on a function, add function parameters to the scope.
1216 bool HasFunScope = EnterScope && D->isFunctionOrFunctionTemplate();
1217 ParseScope FnScope(this, Scope::FnScope|Scope::DeclScope, HasFunScope);
1219 Actions.ActOnReenterFunctionContext(Actions.CurScope, D);
1221 ParseGNUAttributeArgs(&LA.AttrName, LA.AttrNameLoc, Attrs, &endLoc,
1222 nullptr, SourceLocation(), AttributeList::AS_GNU,
1226 Actions.ActOnExitFunctionContext();
1227 FnScope.Exit(); // Pop scope, and remove Decls from IdResolver
1229 if (HasTemplateScope) {
1233 // If there are multiple decls, then the decl cannot be within the
1235 ParseGNUAttributeArgs(&LA.AttrName, LA.AttrNameLoc, Attrs, &endLoc,
1236 nullptr, SourceLocation(), AttributeList::AS_GNU,
1240 Diag(Tok, diag::warn_attribute_no_decl) << LA.AttrName.getName();
1243 const AttributeList *AL = Attrs.getList();
1244 if (OnDefinition && AL && !AL->isCXX11Attribute() &&
1246 Diag(Tok, diag::warn_attribute_on_function_definition)
1249 for (unsigned i = 0, ni = LA.Decls.size(); i < ni; ++i)
1250 Actions.ActOnFinishDelayedAttribute(getCurScope(), LA.Decls[i], Attrs);
1252 // Due to a parsing error, we either went over the cached tokens or
1253 // there are still cached tokens left, so we skip the leftover tokens.
1254 while (Tok.isNot(tok::eof))
1257 if (Tok.is(tok::eof) && Tok.getEofData() == AttrEnd.getEofData())
1261 void Parser::ParseTypeTagForDatatypeAttribute(IdentifierInfo &AttrName,
1262 SourceLocation AttrNameLoc,
1263 ParsedAttributes &Attrs,
1264 SourceLocation *EndLoc,
1265 IdentifierInfo *ScopeName,
1266 SourceLocation ScopeLoc,
1267 AttributeList::Syntax Syntax) {
1268 assert(Tok.is(tok::l_paren) && "Attribute arg list not starting with '('");
1270 BalancedDelimiterTracker T(*this, tok::l_paren);
1273 if (Tok.isNot(tok::identifier)) {
1274 Diag(Tok, diag::err_expected) << tok::identifier;
1278 IdentifierLoc *ArgumentKind = ParseIdentifierLoc();
1280 if (ExpectAndConsume(tok::comma)) {
1285 SourceRange MatchingCTypeRange;
1286 TypeResult MatchingCType = ParseTypeName(&MatchingCTypeRange);
1287 if (MatchingCType.isInvalid()) {
1292 bool LayoutCompatible = false;
1293 bool MustBeNull = false;
1294 while (TryConsumeToken(tok::comma)) {
1295 if (Tok.isNot(tok::identifier)) {
1296 Diag(Tok, diag::err_expected) << tok::identifier;
1300 IdentifierInfo *Flag = Tok.getIdentifierInfo();
1301 if (Flag->isStr("layout_compatible"))
1302 LayoutCompatible = true;
1303 else if (Flag->isStr("must_be_null"))
1306 Diag(Tok, diag::err_type_safety_unknown_flag) << Flag;
1310 ConsumeToken(); // consume flag
1313 if (!T.consumeClose()) {
1314 Attrs.addNewTypeTagForDatatype(&AttrName, AttrNameLoc, ScopeName, ScopeLoc,
1315 ArgumentKind, MatchingCType.get(),
1316 LayoutCompatible, MustBeNull, Syntax);
1320 *EndLoc = T.getCloseLocation();
1323 /// DiagnoseProhibitedCXX11Attribute - We have found the opening square brackets
1324 /// of a C++11 attribute-specifier in a location where an attribute is not
1325 /// permitted. By C++11 [dcl.attr.grammar]p6, this is ill-formed. Diagnose this
1328 /// \return \c true if we skipped an attribute-like chunk of tokens, \c false if
1329 /// this doesn't appear to actually be an attribute-specifier, and the caller
1330 /// should try to parse it.
1331 bool Parser::DiagnoseProhibitedCXX11Attribute() {
1332 assert(Tok.is(tok::l_square) && NextToken().is(tok::l_square));
1334 switch (isCXX11AttributeSpecifier(/*Disambiguate*/true)) {
1335 case CAK_NotAttributeSpecifier:
1336 // No diagnostic: we're in Obj-C++11 and this is not actually an attribute.
1339 case CAK_InvalidAttributeSpecifier:
1340 Diag(Tok.getLocation(), diag::err_l_square_l_square_not_attribute);
1343 case CAK_AttributeSpecifier:
1344 // Parse and discard the attributes.
1345 SourceLocation BeginLoc = ConsumeBracket();
1347 SkipUntil(tok::r_square);
1348 assert(Tok.is(tok::r_square) && "isCXX11AttributeSpecifier lied");
1349 SourceLocation EndLoc = ConsumeBracket();
1350 Diag(BeginLoc, diag::err_attributes_not_allowed)
1351 << SourceRange(BeginLoc, EndLoc);
1354 llvm_unreachable("All cases handled above.");
1357 /// \brief We have found the opening square brackets of a C++11
1358 /// attribute-specifier in a location where an attribute is not permitted, but
1359 /// we know where the attributes ought to be written. Parse them anyway, and
1360 /// provide a fixit moving them to the right place.
1361 void Parser::DiagnoseMisplacedCXX11Attribute(ParsedAttributesWithRange &Attrs,
1362 SourceLocation CorrectLocation) {
1363 assert((Tok.is(tok::l_square) && NextToken().is(tok::l_square)) ||
1364 Tok.is(tok::kw_alignas));
1366 // Consume the attributes.
1367 SourceLocation Loc = Tok.getLocation();
1368 ParseCXX11Attributes(Attrs);
1369 CharSourceRange AttrRange(SourceRange(Loc, Attrs.Range.getEnd()), true);
1371 Diag(Loc, diag::err_attributes_not_allowed)
1372 << FixItHint::CreateInsertionFromRange(CorrectLocation, AttrRange)
1373 << FixItHint::CreateRemoval(AttrRange);
1376 void Parser::DiagnoseProhibitedAttributes(ParsedAttributesWithRange &attrs) {
1377 Diag(attrs.Range.getBegin(), diag::err_attributes_not_allowed)
1381 void Parser::ProhibitCXX11Attributes(ParsedAttributesWithRange &attrs) {
1382 AttributeList *AttrList = attrs.getList();
1384 if (AttrList->isCXX11Attribute()) {
1385 Diag(AttrList->getLoc(), diag::err_attribute_not_type_attr)
1386 << AttrList->getName();
1387 AttrList->setInvalid();
1389 AttrList = AttrList->getNext();
1393 // As an exception to the rule, __declspec(align(...)) before the
1394 // class-key affects the type instead of the variable.
1395 void Parser::handleDeclspecAlignBeforeClassKey(ParsedAttributesWithRange &Attrs,
1397 Sema::TagUseKind TUK) {
1398 if (TUK == Sema::TUK_Reference)
1401 ParsedAttributes &PA = DS.getAttributes();
1402 AttributeList *AL = PA.getList();
1403 AttributeList *Prev = nullptr;
1405 AttributeList *Next = AL->getNext();
1407 // We only consider attributes using the appropriate '__declspec' spelling,
1408 // this behavior doesn't extend to any other spellings.
1409 if (AL->getKind() == AttributeList::AT_Aligned &&
1410 AL->isDeclspecAttribute()) {
1411 // Stitch the attribute into the tag's attribute list.
1412 AL->setNext(nullptr);
1415 // Remove the attribute from the variable's attribute list.
1417 // Set the last variable attribute's next attribute to be the attribute
1418 // after the current one.
1419 Prev->setNext(Next);
1421 // Removing the head of the list requires us to reset the head to the
1433 /// ParseDeclaration - Parse a full 'declaration', which consists of
1434 /// declaration-specifiers, some number of declarators, and a semicolon.
1435 /// 'Context' should be a Declarator::TheContext value. This returns the
1436 /// location of the semicolon in DeclEnd.
1438 /// declaration: [C99 6.7]
1439 /// block-declaration ->
1440 /// simple-declaration
1442 /// [C++] template-declaration
1443 /// [C++] namespace-definition
1444 /// [C++] using-directive
1445 /// [C++] using-declaration
1446 /// [C++11/C11] static_assert-declaration
1447 /// others... [FIXME]
1449 Parser::DeclGroupPtrTy Parser::ParseDeclaration(unsigned Context,
1450 SourceLocation &DeclEnd,
1451 ParsedAttributesWithRange &attrs) {
1452 ParenBraceBracketBalancer BalancerRAIIObj(*this);
1453 // Must temporarily exit the objective-c container scope for
1454 // parsing c none objective-c decls.
1455 ObjCDeclContextSwitch ObjCDC(*this);
1457 Decl *SingleDecl = nullptr;
1458 Decl *OwnedType = nullptr;
1459 switch (Tok.getKind()) {
1460 case tok::kw_template:
1461 case tok::kw_export:
1462 ProhibitAttributes(attrs);
1463 SingleDecl = ParseDeclarationStartingWithTemplate(Context, DeclEnd);
1465 case tok::kw_inline:
1466 // Could be the start of an inline namespace. Allowed as an ext in C++03.
1467 if (getLangOpts().CPlusPlus && NextToken().is(tok::kw_namespace)) {
1468 ProhibitAttributes(attrs);
1469 SourceLocation InlineLoc = ConsumeToken();
1470 SingleDecl = ParseNamespace(Context, DeclEnd, InlineLoc);
1473 return ParseSimpleDeclaration(Context, DeclEnd, attrs,
1475 case tok::kw_namespace:
1476 ProhibitAttributes(attrs);
1477 SingleDecl = ParseNamespace(Context, DeclEnd);
1480 SingleDecl = ParseUsingDirectiveOrDeclaration(Context, ParsedTemplateInfo(),
1481 DeclEnd, attrs, &OwnedType);
1483 case tok::kw_static_assert:
1484 case tok::kw__Static_assert:
1485 ProhibitAttributes(attrs);
1486 SingleDecl = ParseStaticAssertDeclaration(DeclEnd);
1489 return ParseSimpleDeclaration(Context, DeclEnd, attrs, true);
1492 // This routine returns a DeclGroup, if the thing we parsed only contains a
1493 // single decl, convert it now. Alias declarations can also declare a type;
1494 // include that too if it is present.
1495 return Actions.ConvertDeclToDeclGroup(SingleDecl, OwnedType);
1498 /// simple-declaration: [C99 6.7: declaration] [C++ 7p1: dcl.dcl]
1499 /// declaration-specifiers init-declarator-list[opt] ';'
1500 /// [C++11] attribute-specifier-seq decl-specifier-seq[opt]
1501 /// init-declarator-list ';'
1502 ///[C90/C++]init-declarator-list ';' [TODO]
1503 /// [OMP] threadprivate-directive [TODO]
1505 /// for-range-declaration: [C++11 6.5p1: stmt.ranged]
1506 /// attribute-specifier-seq[opt] type-specifier-seq declarator
1508 /// If RequireSemi is false, this does not check for a ';' at the end of the
1509 /// declaration. If it is true, it checks for and eats it.
1511 /// If FRI is non-null, we might be parsing a for-range-declaration instead
1512 /// of a simple-declaration. If we find that we are, we also parse the
1513 /// for-range-initializer, and place it here.
1514 Parser::DeclGroupPtrTy
1515 Parser::ParseSimpleDeclaration(unsigned Context,
1516 SourceLocation &DeclEnd,
1517 ParsedAttributesWithRange &Attrs,
1518 bool RequireSemi, ForRangeInit *FRI) {
1519 // Parse the common declaration-specifiers piece.
1520 ParsingDeclSpec DS(*this);
1522 DeclSpecContext DSContext = getDeclSpecContextFromDeclaratorContext(Context);
1523 ParseDeclarationSpecifiers(DS, ParsedTemplateInfo(), AS_none, DSContext);
1525 // If we had a free-standing type definition with a missing semicolon, we
1526 // may get this far before the problem becomes obvious.
1527 if (DS.hasTagDefinition() &&
1528 DiagnoseMissingSemiAfterTagDefinition(DS, AS_none, DSContext))
1529 return DeclGroupPtrTy();
1531 // C99 6.7.2.3p6: Handle "struct-or-union identifier;", "enum { X };"
1532 // declaration-specifiers init-declarator-list[opt] ';'
1533 if (Tok.is(tok::semi)) {
1534 ProhibitAttributes(Attrs);
1535 DeclEnd = Tok.getLocation();
1536 if (RequireSemi) ConsumeToken();
1537 Decl *TheDecl = Actions.ParsedFreeStandingDeclSpec(getCurScope(), AS_none,
1539 DS.complete(TheDecl);
1540 return Actions.ConvertDeclToDeclGroup(TheDecl);
1543 DS.takeAttributesFrom(Attrs);
1544 return ParseDeclGroup(DS, Context, &DeclEnd, FRI);
1547 /// Returns true if this might be the start of a declarator, or a common typo
1548 /// for a declarator.
1549 bool Parser::MightBeDeclarator(unsigned Context) {
1550 switch (Tok.getKind()) {
1551 case tok::annot_cxxscope:
1552 case tok::annot_template_id:
1554 case tok::code_completion:
1555 case tok::coloncolon:
1557 case tok::kw___attribute:
1558 case tok::kw_operator:
1565 return getLangOpts().CPlusPlus;
1567 case tok::l_square: // Might be an attribute on an unnamed bit-field.
1568 return Context == Declarator::MemberContext && getLangOpts().CPlusPlus11 &&
1569 NextToken().is(tok::l_square);
1571 case tok::colon: // Might be a typo for '::' or an unnamed bit-field.
1572 return Context == Declarator::MemberContext || getLangOpts().CPlusPlus;
1574 case tok::identifier:
1575 switch (NextToken().getKind()) {
1576 case tok::code_completion:
1577 case tok::coloncolon:
1580 case tok::equalequal: // Might be a typo for '='.
1581 case tok::kw_alignas:
1583 case tok::kw___attribute:
1595 // At namespace scope, 'identifier:' is probably a typo for 'identifier::'
1596 // and in block scope it's probably a label. Inside a class definition,
1597 // this is a bit-field.
1598 return Context == Declarator::MemberContext ||
1599 (getLangOpts().CPlusPlus && Context == Declarator::FileContext);
1601 case tok::identifier: // Possible virt-specifier.
1602 return getLangOpts().CPlusPlus11 && isCXX11VirtSpecifier(NextToken());
1613 /// Skip until we reach something which seems like a sensible place to pick
1614 /// up parsing after a malformed declaration. This will sometimes stop sooner
1615 /// than SkipUntil(tok::r_brace) would, but will never stop later.
1616 void Parser::SkipMalformedDecl() {
1618 switch (Tok.getKind()) {
1620 // Skip until matching }, then stop. We've probably skipped over
1621 // a malformed class or function definition or similar.
1623 SkipUntil(tok::r_brace);
1624 if (Tok.isOneOf(tok::comma, tok::l_brace, tok::kw_try)) {
1625 // This declaration isn't over yet. Keep skipping.
1628 TryConsumeToken(tok::semi);
1633 SkipUntil(tok::r_square);
1638 SkipUntil(tok::r_paren);
1648 case tok::kw_inline:
1649 // 'inline namespace' at the start of a line is almost certainly
1650 // a good place to pick back up parsing, except in an Objective-C
1651 // @interface context.
1652 if (Tok.isAtStartOfLine() && NextToken().is(tok::kw_namespace) &&
1653 (!ParsingInObjCContainer || CurParsedObjCImpl))
1657 case tok::kw_namespace:
1658 // 'namespace' at the start of a line is almost certainly a good
1659 // place to pick back up parsing, except in an Objective-C
1660 // @interface context.
1661 if (Tok.isAtStartOfLine() &&
1662 (!ParsingInObjCContainer || CurParsedObjCImpl))
1667 // @end is very much like } in Objective-C contexts.
1668 if (NextToken().isObjCAtKeyword(tok::objc_end) &&
1669 ParsingInObjCContainer)
1675 // - and + probably start new method declarations in Objective-C contexts.
1676 if (Tok.isAtStartOfLine() && ParsingInObjCContainer)
1681 case tok::annot_module_begin:
1682 case tok::annot_module_end:
1683 case tok::annot_module_include:
1694 /// ParseDeclGroup - Having concluded that this is either a function
1695 /// definition or a group of object declarations, actually parse the
1697 Parser::DeclGroupPtrTy Parser::ParseDeclGroup(ParsingDeclSpec &DS,
1699 SourceLocation *DeclEnd,
1700 ForRangeInit *FRI) {
1701 // Parse the first declarator.
1702 ParsingDeclarator D(*this, DS, static_cast<Declarator::TheContext>(Context));
1705 // Bail out if the first declarator didn't seem well-formed.
1706 if (!D.hasName() && !D.mayOmitIdentifier()) {
1707 SkipMalformedDecl();
1708 return DeclGroupPtrTy();
1711 // Save late-parsed attributes for now; they need to be parsed in the
1712 // appropriate function scope after the function Decl has been constructed.
1713 // These will be parsed in ParseFunctionDefinition or ParseLexedAttrList.
1714 LateParsedAttrList LateParsedAttrs(true);
1715 if (D.isFunctionDeclarator()) {
1716 MaybeParseGNUAttributes(D, &LateParsedAttrs);
1718 // The _Noreturn keyword can't appear here, unlike the GNU noreturn
1719 // attribute. If we find the keyword here, tell the user to put it
1720 // at the start instead.
1721 if (Tok.is(tok::kw__Noreturn)) {
1722 SourceLocation Loc = ConsumeToken();
1723 const char *PrevSpec;
1726 // We can offer a fixit if it's valid to mark this function as _Noreturn
1727 // and we don't have any other declarators in this declaration.
1728 bool Fixit = !DS.setFunctionSpecNoreturn(Loc, PrevSpec, DiagID);
1729 MaybeParseGNUAttributes(D, &LateParsedAttrs);
1730 Fixit &= Tok.isOneOf(tok::semi, tok::l_brace, tok::kw_try);
1732 Diag(Loc, diag::err_c11_noreturn_misplaced)
1733 << (Fixit ? FixItHint::CreateRemoval(Loc) : FixItHint())
1734 << (Fixit ? FixItHint::CreateInsertion(D.getLocStart(), "_Noreturn ")
1739 // Check to see if we have a function *definition* which must have a body.
1740 if (D.isFunctionDeclarator() &&
1741 // Look at the next token to make sure that this isn't a function
1742 // declaration. We have to check this because __attribute__ might be the
1743 // start of a function definition in GCC-extended K&R C.
1744 !isDeclarationAfterDeclarator()) {
1746 // Function definitions are only allowed at file scope and in C++ classes.
1747 // The C++ inline method definition case is handled elsewhere, so we only
1748 // need to handle the file scope definition case.
1749 if (Context == Declarator::FileContext) {
1750 if (isStartOfFunctionDefinition(D)) {
1751 if (DS.getStorageClassSpec() == DeclSpec::SCS_typedef) {
1752 Diag(Tok, diag::err_function_declared_typedef);
1754 // Recover by treating the 'typedef' as spurious.
1755 DS.ClearStorageClassSpecs();
1759 ParseFunctionDefinition(D, ParsedTemplateInfo(), &LateParsedAttrs);
1760 return Actions.ConvertDeclToDeclGroup(TheDecl);
1763 if (isDeclarationSpecifier()) {
1764 // If there is an invalid declaration specifier right after the
1765 // function prototype, then we must be in a missing semicolon case
1766 // where this isn't actually a body. Just fall through into the code
1767 // that handles it as a prototype, and let the top-level code handle
1768 // the erroneous declspec where it would otherwise expect a comma or
1771 Diag(Tok, diag::err_expected_fn_body);
1772 SkipUntil(tok::semi);
1773 return DeclGroupPtrTy();
1776 if (Tok.is(tok::l_brace)) {
1777 Diag(Tok, diag::err_function_definition_not_allowed);
1778 SkipMalformedDecl();
1779 return DeclGroupPtrTy();
1784 if (ParseAsmAttributesAfterDeclarator(D))
1785 return DeclGroupPtrTy();
1787 // C++0x [stmt.iter]p1: Check if we have a for-range-declarator. If so, we
1788 // must parse and analyze the for-range-initializer before the declaration is
1791 // Handle the Objective-C for-in loop variable similarly, although we
1792 // don't need to parse the container in advance.
1793 if (FRI && (Tok.is(tok::colon) || isTokIdentifier_in())) {
1794 bool IsForRangeLoop = false;
1795 if (TryConsumeToken(tok::colon, FRI->ColonLoc)) {
1796 IsForRangeLoop = true;
1797 if (Tok.is(tok::l_brace))
1798 FRI->RangeExpr = ParseBraceInitializer();
1800 FRI->RangeExpr = ParseExpression();
1803 Decl *ThisDecl = Actions.ActOnDeclarator(getCurScope(), D);
1805 Actions.ActOnCXXForRangeDecl(ThisDecl);
1806 Actions.FinalizeDeclaration(ThisDecl);
1807 D.complete(ThisDecl);
1808 return Actions.FinalizeDeclaratorGroup(getCurScope(), DS, ThisDecl);
1811 SmallVector<Decl *, 8> DeclsInGroup;
1812 Decl *FirstDecl = ParseDeclarationAfterDeclaratorAndAttributes(
1813 D, ParsedTemplateInfo(), FRI);
1814 if (LateParsedAttrs.size() > 0)
1815 ParseLexedAttributeList(LateParsedAttrs, FirstDecl, true, false);
1816 D.complete(FirstDecl);
1818 DeclsInGroup.push_back(FirstDecl);
1820 bool ExpectSemi = Context != Declarator::ForContext;
1822 // If we don't have a comma, it is either the end of the list (a ';') or an
1824 SourceLocation CommaLoc;
1825 while (TryConsumeToken(tok::comma, CommaLoc)) {
1826 if (Tok.isAtStartOfLine() && ExpectSemi && !MightBeDeclarator(Context)) {
1827 // This comma was followed by a line-break and something which can't be
1828 // the start of a declarator. The comma was probably a typo for a
1830 Diag(CommaLoc, diag::err_expected_semi_declaration)
1831 << FixItHint::CreateReplacement(CommaLoc, ";");
1836 // Parse the next declarator.
1838 D.setCommaLoc(CommaLoc);
1840 // Accept attributes in an init-declarator. In the first declarator in a
1841 // declaration, these would be part of the declspec. In subsequent
1842 // declarators, they become part of the declarator itself, so that they
1843 // don't apply to declarators after *this* one. Examples:
1844 // short __attribute__((common)) var; -> declspec
1845 // short var __attribute__((common)); -> declarator
1846 // short x, __attribute__((common)) var; -> declarator
1847 MaybeParseGNUAttributes(D);
1849 // MSVC parses but ignores qualifiers after the comma as an extension.
1850 if (getLangOpts().MicrosoftExt)
1851 DiagnoseAndSkipExtendedMicrosoftTypeAttributes();
1854 if (!D.isInvalidType()) {
1855 Decl *ThisDecl = ParseDeclarationAfterDeclarator(D);
1856 D.complete(ThisDecl);
1858 DeclsInGroup.push_back(ThisDecl);
1863 *DeclEnd = Tok.getLocation();
1866 ExpectAndConsumeSemi(Context == Declarator::FileContext
1867 ? diag::err_invalid_token_after_toplevel_declarator
1868 : diag::err_expected_semi_declaration)) {
1869 // Okay, there was no semicolon and one was expected. If we see a
1870 // declaration specifier, just assume it was missing and continue parsing.
1871 // Otherwise things are very confused and we skip to recover.
1872 if (!isDeclarationSpecifier()) {
1873 SkipUntil(tok::r_brace, StopAtSemi | StopBeforeMatch);
1874 TryConsumeToken(tok::semi);
1878 return Actions.FinalizeDeclaratorGroup(getCurScope(), DS, DeclsInGroup);
1881 /// Parse an optional simple-asm-expr and attributes, and attach them to a
1882 /// declarator. Returns true on an error.
1883 bool Parser::ParseAsmAttributesAfterDeclarator(Declarator &D) {
1884 // If a simple-asm-expr is present, parse it.
1885 if (Tok.is(tok::kw_asm)) {
1887 ExprResult AsmLabel(ParseSimpleAsm(&Loc));
1888 if (AsmLabel.isInvalid()) {
1889 SkipUntil(tok::semi, StopBeforeMatch);
1893 D.setAsmLabel(AsmLabel.get());
1897 MaybeParseGNUAttributes(D);
1901 /// \brief Parse 'declaration' after parsing 'declaration-specifiers
1902 /// declarator'. This method parses the remainder of the declaration
1903 /// (including any attributes or initializer, among other things) and
1904 /// finalizes the declaration.
1906 /// init-declarator: [C99 6.7]
1908 /// declarator '=' initializer
1909 /// [GNU] declarator simple-asm-expr[opt] attributes[opt]
1910 /// [GNU] declarator simple-asm-expr[opt] attributes[opt] '=' initializer
1911 /// [C++] declarator initializer[opt]
1913 /// [C++] initializer:
1914 /// [C++] '=' initializer-clause
1915 /// [C++] '(' expression-list ')'
1916 /// [C++0x] '=' 'default' [TODO]
1917 /// [C++0x] '=' 'delete'
1918 /// [C++0x] braced-init-list
1920 /// According to the standard grammar, =default and =delete are function
1921 /// definitions, but that definitely doesn't fit with the parser here.
1923 Decl *Parser::ParseDeclarationAfterDeclarator(
1924 Declarator &D, const ParsedTemplateInfo &TemplateInfo) {
1925 if (ParseAsmAttributesAfterDeclarator(D))
1928 return ParseDeclarationAfterDeclaratorAndAttributes(D, TemplateInfo);
1931 Decl *Parser::ParseDeclarationAfterDeclaratorAndAttributes(
1932 Declarator &D, const ParsedTemplateInfo &TemplateInfo, ForRangeInit *FRI) {
1933 // Inform the current actions module that we just parsed this declarator.
1934 Decl *ThisDecl = nullptr;
1935 switch (TemplateInfo.Kind) {
1936 case ParsedTemplateInfo::NonTemplate:
1937 ThisDecl = Actions.ActOnDeclarator(getCurScope(), D);
1940 case ParsedTemplateInfo::Template:
1941 case ParsedTemplateInfo::ExplicitSpecialization: {
1942 ThisDecl = Actions.ActOnTemplateDeclarator(getCurScope(),
1943 *TemplateInfo.TemplateParams,
1945 if (VarTemplateDecl *VT = dyn_cast_or_null<VarTemplateDecl>(ThisDecl))
1946 // Re-direct this decl to refer to the templated decl so that we can
1948 ThisDecl = VT->getTemplatedDecl();
1951 case ParsedTemplateInfo::ExplicitInstantiation: {
1952 if (Tok.is(tok::semi)) {
1953 DeclResult ThisRes = Actions.ActOnExplicitInstantiation(
1954 getCurScope(), TemplateInfo.ExternLoc, TemplateInfo.TemplateLoc, D);
1955 if (ThisRes.isInvalid()) {
1956 SkipUntil(tok::semi, StopBeforeMatch);
1959 ThisDecl = ThisRes.get();
1961 // FIXME: This check should be for a variable template instantiation only.
1963 // Check that this is a valid instantiation
1964 if (D.getName().getKind() != UnqualifiedId::IK_TemplateId) {
1965 // If the declarator-id is not a template-id, issue a diagnostic and
1966 // recover by ignoring the 'template' keyword.
1967 Diag(Tok, diag::err_template_defn_explicit_instantiation)
1968 << 2 << FixItHint::CreateRemoval(TemplateInfo.TemplateLoc);
1969 ThisDecl = Actions.ActOnDeclarator(getCurScope(), D);
1971 SourceLocation LAngleLoc =
1972 PP.getLocForEndOfToken(TemplateInfo.TemplateLoc);
1973 Diag(D.getIdentifierLoc(),
1974 diag::err_explicit_instantiation_with_definition)
1975 << SourceRange(TemplateInfo.TemplateLoc)
1976 << FixItHint::CreateInsertion(LAngleLoc, "<>");
1978 // Recover as if it were an explicit specialization.
1979 TemplateParameterLists FakedParamLists;
1980 FakedParamLists.push_back(Actions.ActOnTemplateParameterList(
1981 0, SourceLocation(), TemplateInfo.TemplateLoc, LAngleLoc, nullptr,
1985 Actions.ActOnTemplateDeclarator(getCurScope(), FakedParamLists, D);
1992 bool TypeContainsAuto = D.getDeclSpec().containsPlaceholderType();
1994 // Parse declarator '=' initializer.
1995 // If a '==' or '+=' is found, suggest a fixit to '='.
1996 if (isTokenEqualOrEqualTypo()) {
1997 SourceLocation EqualLoc = ConsumeToken();
1999 if (Tok.is(tok::kw_delete)) {
2000 if (D.isFunctionDeclarator())
2001 Diag(ConsumeToken(), diag::err_default_delete_in_multiple_declaration)
2004 Diag(ConsumeToken(), diag::err_deleted_non_function);
2005 } else if (Tok.is(tok::kw_default)) {
2006 if (D.isFunctionDeclarator())
2007 Diag(ConsumeToken(), diag::err_default_delete_in_multiple_declaration)
2010 Diag(ConsumeToken(), diag::err_default_special_members);
2012 if (getLangOpts().CPlusPlus && D.getCXXScopeSpec().isSet()) {
2014 Actions.ActOnCXXEnterDeclInitializer(getCurScope(), ThisDecl);
2017 if (Tok.is(tok::code_completion)) {
2018 Actions.CodeCompleteInitializer(getCurScope(), ThisDecl);
2019 Actions.FinalizeDeclaration(ThisDecl);
2024 ExprResult Init(ParseInitializer());
2026 // If this is the only decl in (possibly) range based for statement,
2027 // our best guess is that the user meant ':' instead of '='.
2028 if (Tok.is(tok::r_paren) && FRI && D.isFirstDeclarator()) {
2029 Diag(EqualLoc, diag::err_single_decl_assign_in_for_range)
2030 << FixItHint::CreateReplacement(EqualLoc, ":");
2031 // We are trying to stop parser from looking for ';' in this for
2032 // statement, therefore preventing spurious errors to be issued.
2033 FRI->ColonLoc = EqualLoc;
2035 FRI->RangeExpr = Init;
2038 if (getLangOpts().CPlusPlus && D.getCXXScopeSpec().isSet()) {
2039 Actions.ActOnCXXExitDeclInitializer(getCurScope(), ThisDecl);
2043 if (Init.isInvalid()) {
2044 SmallVector<tok::TokenKind, 2> StopTokens;
2045 StopTokens.push_back(tok::comma);
2046 if (D.getContext() == Declarator::ForContext)
2047 StopTokens.push_back(tok::r_paren);
2048 SkipUntil(StopTokens, StopAtSemi | StopBeforeMatch);
2049 Actions.ActOnInitializerError(ThisDecl);
2051 Actions.AddInitializerToDecl(ThisDecl, Init.get(),
2052 /*DirectInit=*/false, TypeContainsAuto);
2054 } else if (Tok.is(tok::l_paren)) {
2055 // Parse C++ direct initializer: '(' expression-list ')'
2056 BalancedDelimiterTracker T(*this, tok::l_paren);
2060 CommaLocsTy CommaLocs;
2062 if (getLangOpts().CPlusPlus && D.getCXXScopeSpec().isSet()) {
2064 Actions.ActOnCXXEnterDeclInitializer(getCurScope(), ThisDecl);
2067 if (ParseExpressionList(Exprs, CommaLocs, [&] {
2068 Actions.CodeCompleteConstructor(getCurScope(),
2069 cast<VarDecl>(ThisDecl)->getType()->getCanonicalTypeInternal(),
2070 ThisDecl->getLocation(), Exprs);
2072 Actions.ActOnInitializerError(ThisDecl);
2073 SkipUntil(tok::r_paren, StopAtSemi);
2075 if (getLangOpts().CPlusPlus && D.getCXXScopeSpec().isSet()) {
2076 Actions.ActOnCXXExitDeclInitializer(getCurScope(), ThisDecl);
2083 assert(!Exprs.empty() && Exprs.size()-1 == CommaLocs.size() &&
2084 "Unexpected number of commas!");
2086 if (getLangOpts().CPlusPlus && D.getCXXScopeSpec().isSet()) {
2087 Actions.ActOnCXXExitDeclInitializer(getCurScope(), ThisDecl);
2091 ExprResult Initializer = Actions.ActOnParenListExpr(T.getOpenLocation(),
2092 T.getCloseLocation(),
2094 Actions.AddInitializerToDecl(ThisDecl, Initializer.get(),
2095 /*DirectInit=*/true, TypeContainsAuto);
2097 } else if (getLangOpts().CPlusPlus11 && Tok.is(tok::l_brace) &&
2098 (!CurParsedObjCImpl || !D.isFunctionDeclarator())) {
2099 // Parse C++0x braced-init-list.
2100 Diag(Tok, diag::warn_cxx98_compat_generalized_initializer_lists);
2102 if (D.getCXXScopeSpec().isSet()) {
2104 Actions.ActOnCXXEnterDeclInitializer(getCurScope(), ThisDecl);
2107 ExprResult Init(ParseBraceInitializer());
2109 if (D.getCXXScopeSpec().isSet()) {
2110 Actions.ActOnCXXExitDeclInitializer(getCurScope(), ThisDecl);
2114 if (Init.isInvalid()) {
2115 Actions.ActOnInitializerError(ThisDecl);
2117 Actions.AddInitializerToDecl(ThisDecl, Init.get(),
2118 /*DirectInit=*/true, TypeContainsAuto);
2121 Actions.ActOnUninitializedDecl(ThisDecl, TypeContainsAuto);
2124 Actions.FinalizeDeclaration(ThisDecl);
2129 /// ParseSpecifierQualifierList
2130 /// specifier-qualifier-list:
2131 /// type-specifier specifier-qualifier-list[opt]
2132 /// type-qualifier specifier-qualifier-list[opt]
2133 /// [GNU] attributes specifier-qualifier-list[opt]
2135 void Parser::ParseSpecifierQualifierList(DeclSpec &DS, AccessSpecifier AS,
2136 DeclSpecContext DSC) {
2137 /// specifier-qualifier-list is a subset of declaration-specifiers. Just
2138 /// parse declaration-specifiers and complain about extra stuff.
2139 /// TODO: diagnose attribute-specifiers and alignment-specifiers.
2140 ParseDeclarationSpecifiers(DS, ParsedTemplateInfo(), AS, DSC);
2142 // Validate declspec for type-name.
2143 unsigned Specs = DS.getParsedSpecifiers();
2144 if (isTypeSpecifier(DSC) && !DS.hasTypeSpecifier()) {
2145 Diag(Tok, diag::err_expected_type);
2146 DS.SetTypeSpecError();
2147 } else if (Specs == DeclSpec::PQ_None && !DS.getNumProtocolQualifiers() &&
2148 !DS.hasAttributes()) {
2149 Diag(Tok, diag::err_typename_requires_specqual);
2150 if (!DS.hasTypeSpecifier())
2151 DS.SetTypeSpecError();
2154 // Issue diagnostic and remove storage class if present.
2155 if (Specs & DeclSpec::PQ_StorageClassSpecifier) {
2156 if (DS.getStorageClassSpecLoc().isValid())
2157 Diag(DS.getStorageClassSpecLoc(),diag::err_typename_invalid_storageclass);
2159 Diag(DS.getThreadStorageClassSpecLoc(),
2160 diag::err_typename_invalid_storageclass);
2161 DS.ClearStorageClassSpecs();
2164 // Issue diagnostic and remove function specfier if present.
2165 if (Specs & DeclSpec::PQ_FunctionSpecifier) {
2166 if (DS.isInlineSpecified())
2167 Diag(DS.getInlineSpecLoc(), diag::err_typename_invalid_functionspec);
2168 if (DS.isVirtualSpecified())
2169 Diag(DS.getVirtualSpecLoc(), diag::err_typename_invalid_functionspec);
2170 if (DS.isExplicitSpecified())
2171 Diag(DS.getExplicitSpecLoc(), diag::err_typename_invalid_functionspec);
2172 DS.ClearFunctionSpecs();
2175 // Issue diagnostic and remove constexpr specfier if present.
2176 if (DS.isConstexprSpecified()) {
2177 Diag(DS.getConstexprSpecLoc(), diag::err_typename_invalid_constexpr);
2178 DS.ClearConstexprSpec();
2182 /// isValidAfterIdentifierInDeclaratorAfterDeclSpec - Return true if the
2183 /// specified token is valid after the identifier in a declarator which
2184 /// immediately follows the declspec. For example, these things are valid:
2186 /// int x [ 4]; // direct-declarator
2187 /// int x ( int y); // direct-declarator
2188 /// int(int x ) // direct-declarator
2189 /// int x ; // simple-declaration
2190 /// int x = 17; // init-declarator-list
2191 /// int x , y; // init-declarator-list
2192 /// int x __asm__ ("foo"); // init-declarator-list
2193 /// int x : 4; // struct-declarator
2194 /// int x { 5}; // C++'0x unified initializers
2196 /// This is not, because 'x' does not immediately follow the declspec (though
2197 /// ')' happens to be valid anyway).
2200 static bool isValidAfterIdentifierInDeclarator(const Token &T) {
2201 return T.isOneOf(tok::l_square, tok::l_paren, tok::r_paren, tok::semi,
2202 tok::comma, tok::equal, tok::kw_asm, tok::l_brace,
2207 /// ParseImplicitInt - This method is called when we have an non-typename
2208 /// identifier in a declspec (which normally terminates the decl spec) when
2209 /// the declspec has no type specifier. In this case, the declspec is either
2210 /// malformed or is "implicit int" (in K&R and C89).
2212 /// This method handles diagnosing this prettily and returns false if the
2213 /// declspec is done being processed. If it recovers and thinks there may be
2214 /// other pieces of declspec after it, it returns true.
2216 bool Parser::ParseImplicitInt(DeclSpec &DS, CXXScopeSpec *SS,
2217 const ParsedTemplateInfo &TemplateInfo,
2218 AccessSpecifier AS, DeclSpecContext DSC,
2219 ParsedAttributesWithRange &Attrs) {
2220 assert(Tok.is(tok::identifier) && "should have identifier");
2222 SourceLocation Loc = Tok.getLocation();
2223 // If we see an identifier that is not a type name, we normally would
2224 // parse it as the identifer being declared. However, when a typename
2225 // is typo'd or the definition is not included, this will incorrectly
2226 // parse the typename as the identifier name and fall over misparsing
2227 // later parts of the diagnostic.
2229 // As such, we try to do some look-ahead in cases where this would
2230 // otherwise be an "implicit-int" case to see if this is invalid. For
2231 // example: "static foo_t x = 4;" In this case, if we parsed foo_t as
2232 // an identifier with implicit int, we'd get a parse error because the
2233 // next token is obviously invalid for a type. Parse these as a case
2234 // with an invalid type specifier.
2235 assert(!DS.hasTypeSpecifier() && "Type specifier checked above");
2237 // Since we know that this either implicit int (which is rare) or an
2238 // error, do lookahead to try to do better recovery. This never applies
2239 // within a type specifier. Outside of C++, we allow this even if the
2240 // language doesn't "officially" support implicit int -- we support
2241 // implicit int as an extension in C99 and C11.
2242 if (!isTypeSpecifier(DSC) && !getLangOpts().CPlusPlus &&
2243 isValidAfterIdentifierInDeclarator(NextToken())) {
2244 // If this token is valid for implicit int, e.g. "static x = 4", then
2245 // we just avoid eating the identifier, so it will be parsed as the
2246 // identifier in the declarator.
2250 if (getLangOpts().CPlusPlus &&
2251 DS.getStorageClassSpec() == DeclSpec::SCS_auto) {
2252 // Don't require a type specifier if we have the 'auto' storage class
2253 // specifier in C++98 -- we'll promote it to a type specifier.
2255 AnnotateScopeToken(*SS, /*IsNewAnnotation*/false);
2259 // Otherwise, if we don't consume this token, we are going to emit an
2260 // error anyway. Try to recover from various common problems. Check
2261 // to see if this was a reference to a tag name without a tag specified.
2262 // This is a common problem in C (saying 'foo' instead of 'struct foo').
2264 // C++ doesn't need this, and isTagName doesn't take SS.
2265 if (SS == nullptr) {
2266 const char *TagName = nullptr, *FixitTagName = nullptr;
2267 tok::TokenKind TagKind = tok::unknown;
2269 switch (Actions.isTagName(*Tok.getIdentifierInfo(), getCurScope())) {
2271 case DeclSpec::TST_enum:
2272 TagName="enum" ; FixitTagName = "enum " ; TagKind=tok::kw_enum ;break;
2273 case DeclSpec::TST_union:
2274 TagName="union" ; FixitTagName = "union " ;TagKind=tok::kw_union ;break;
2275 case DeclSpec::TST_struct:
2276 TagName="struct"; FixitTagName = "struct ";TagKind=tok::kw_struct;break;
2277 case DeclSpec::TST_interface:
2278 TagName="__interface"; FixitTagName = "__interface ";
2279 TagKind=tok::kw___interface;break;
2280 case DeclSpec::TST_class:
2281 TagName="class" ; FixitTagName = "class " ;TagKind=tok::kw_class ;break;
2285 IdentifierInfo *TokenName = Tok.getIdentifierInfo();
2286 LookupResult R(Actions, TokenName, SourceLocation(),
2287 Sema::LookupOrdinaryName);
2289 Diag(Loc, diag::err_use_of_tag_name_without_tag)
2290 << TokenName << TagName << getLangOpts().CPlusPlus
2291 << FixItHint::CreateInsertion(Tok.getLocation(), FixitTagName);
2293 if (Actions.LookupParsedName(R, getCurScope(), SS)) {
2294 for (LookupResult::iterator I = R.begin(), IEnd = R.end();
2296 Diag((*I)->getLocation(), diag::note_decl_hiding_tag_type)
2297 << TokenName << TagName;
2300 // Parse this as a tag as if the missing tag were present.
2301 if (TagKind == tok::kw_enum)
2302 ParseEnumSpecifier(Loc, DS, TemplateInfo, AS, DSC_normal);
2304 ParseClassSpecifier(TagKind, Loc, DS, TemplateInfo, AS,
2305 /*EnteringContext*/ false, DSC_normal, Attrs);
2310 // Determine whether this identifier could plausibly be the name of something
2311 // being declared (with a missing type).
2312 if (!isTypeSpecifier(DSC) &&
2313 (!SS || DSC == DSC_top_level || DSC == DSC_class)) {
2314 // Look ahead to the next token to try to figure out what this declaration
2315 // was supposed to be.
2316 switch (NextToken().getKind()) {
2317 case tok::l_paren: {
2318 // static x(4); // 'x' is not a type
2319 // x(int n); // 'x' is not a type
2320 // x (*p)[]; // 'x' is a type
2322 // Since we're in an error case, we can afford to perform a tentative
2323 // parse to determine which case we're in.
2324 TentativeParsingAction PA(*this);
2326 TPResult TPR = TryParseDeclarator(/*mayBeAbstract*/false);
2329 if (TPR != TPResult::False) {
2330 // The identifier is followed by a parenthesized declarator.
2331 // It's supposed to be a type.
2335 // If we're in a context where we could be declaring a constructor,
2336 // check whether this is a constructor declaration with a bogus name.
2337 if (DSC == DSC_class || (DSC == DSC_top_level && SS)) {
2338 IdentifierInfo *II = Tok.getIdentifierInfo();
2339 if (Actions.isCurrentClassNameTypo(II, SS)) {
2340 Diag(Loc, diag::err_constructor_bad_name)
2341 << Tok.getIdentifierInfo() << II
2342 << FixItHint::CreateReplacement(Tok.getLocation(), II->getName());
2343 Tok.setIdentifierInfo(II);
2354 // This looks like a variable or function declaration. The type is
2355 // probably missing. We're done parsing decl-specifiers.
2357 AnnotateScopeToken(*SS, /*IsNewAnnotation*/false);
2361 // This is probably supposed to be a type. This includes cases like:
2363 // struct S { unsinged : 4; };
2368 // This is almost certainly an invalid type name. Let Sema emit a diagnostic
2369 // and attempt to recover.
2371 IdentifierInfo *II = Tok.getIdentifierInfo();
2372 Actions.DiagnoseUnknownTypeName(II, Loc, getCurScope(), SS, T,
2373 getLangOpts().CPlusPlus &&
2374 NextToken().is(tok::less));
2376 // The action has suggested that the type T could be used. Set that as
2377 // the type in the declaration specifiers, consume the would-be type
2378 // name token, and we're done.
2379 const char *PrevSpec;
2381 DS.SetTypeSpecType(DeclSpec::TST_typename, Loc, PrevSpec, DiagID, T,
2382 Actions.getASTContext().getPrintingPolicy());
2383 DS.SetRangeEnd(Tok.getLocation());
2385 // There may be other declaration specifiers after this.
2387 } else if (II != Tok.getIdentifierInfo()) {
2388 // If no type was suggested, the correction is to a keyword
2389 Tok.setKind(II->getTokenID());
2390 // There may be other declaration specifiers after this.
2394 // Otherwise, the action had no suggestion for us. Mark this as an error.
2395 DS.SetTypeSpecError();
2396 DS.SetRangeEnd(Tok.getLocation());
2399 // TODO: Could inject an invalid typedef decl in an enclosing scope to
2400 // avoid rippling error messages on subsequent uses of the same type,
2401 // could be useful if #include was forgotten.
2405 /// \brief Determine the declaration specifier context from the declarator
2408 /// \param Context the declarator context, which is one of the
2409 /// Declarator::TheContext enumerator values.
2410 Parser::DeclSpecContext
2411 Parser::getDeclSpecContextFromDeclaratorContext(unsigned Context) {
2412 if (Context == Declarator::MemberContext)
2414 if (Context == Declarator::FileContext)
2415 return DSC_top_level;
2416 if (Context == Declarator::TemplateTypeArgContext)
2417 return DSC_template_type_arg;
2418 if (Context == Declarator::TrailingReturnContext)
2419 return DSC_trailing;
2420 if (Context == Declarator::AliasDeclContext ||
2421 Context == Declarator::AliasTemplateContext)
2422 return DSC_alias_declaration;
2426 /// ParseAlignArgument - Parse the argument to an alignment-specifier.
2428 /// FIXME: Simply returns an alignof() expression if the argument is a
2429 /// type. Ideally, the type should be propagated directly into Sema.
2432 /// [C11] constant-expression
2433 /// [C++0x] type-id ...[opt]
2434 /// [C++0x] assignment-expression ...[opt]
2435 ExprResult Parser::ParseAlignArgument(SourceLocation Start,
2436 SourceLocation &EllipsisLoc) {
2438 if (isTypeIdInParens()) {
2439 SourceLocation TypeLoc = Tok.getLocation();
2440 ParsedType Ty = ParseTypeName().get();
2441 SourceRange TypeRange(Start, Tok.getLocation());
2442 ER = Actions.ActOnUnaryExprOrTypeTraitExpr(TypeLoc, UETT_AlignOf, true,
2443 Ty.getAsOpaquePtr(), TypeRange);
2445 ER = ParseConstantExpression();
2447 if (getLangOpts().CPlusPlus11)
2448 TryConsumeToken(tok::ellipsis, EllipsisLoc);
2453 /// ParseAlignmentSpecifier - Parse an alignment-specifier, and add the
2454 /// attribute to Attrs.
2456 /// alignment-specifier:
2457 /// [C11] '_Alignas' '(' type-id ')'
2458 /// [C11] '_Alignas' '(' constant-expression ')'
2459 /// [C++11] 'alignas' '(' type-id ...[opt] ')'
2460 /// [C++11] 'alignas' '(' assignment-expression ...[opt] ')'
2461 void Parser::ParseAlignmentSpecifier(ParsedAttributes &Attrs,
2462 SourceLocation *EndLoc) {
2463 assert(Tok.isOneOf(tok::kw_alignas, tok::kw__Alignas) &&
2464 "Not an alignment-specifier!");
2466 IdentifierInfo *KWName = Tok.getIdentifierInfo();
2467 SourceLocation KWLoc = ConsumeToken();
2469 BalancedDelimiterTracker T(*this, tok::l_paren);
2470 if (T.expectAndConsume())
2473 SourceLocation EllipsisLoc;
2474 ExprResult ArgExpr = ParseAlignArgument(T.getOpenLocation(), EllipsisLoc);
2475 if (ArgExpr.isInvalid()) {
2482 *EndLoc = T.getCloseLocation();
2484 ArgsVector ArgExprs;
2485 ArgExprs.push_back(ArgExpr.get());
2486 Attrs.addNew(KWName, KWLoc, nullptr, KWLoc, ArgExprs.data(), 1,
2487 AttributeList::AS_Keyword, EllipsisLoc);
2490 /// Determine whether we're looking at something that might be a declarator
2491 /// in a simple-declaration. If it can't possibly be a declarator, maybe
2492 /// diagnose a missing semicolon after a prior tag definition in the decl
2495 /// \return \c true if an error occurred and this can't be any kind of
2498 Parser::DiagnoseMissingSemiAfterTagDefinition(DeclSpec &DS, AccessSpecifier AS,
2499 DeclSpecContext DSContext,
2500 LateParsedAttrList *LateAttrs) {
2501 assert(DS.hasTagDefinition() && "shouldn't call this");
2503 bool EnteringContext = (DSContext == DSC_class || DSContext == DSC_top_level);
2505 if (getLangOpts().CPlusPlus &&
2506 Tok.isOneOf(tok::identifier, tok::coloncolon, tok::kw_decltype,
2507 tok::annot_template_id) &&
2508 TryAnnotateCXXScopeToken(EnteringContext)) {
2509 SkipMalformedDecl();
2513 bool HasScope = Tok.is(tok::annot_cxxscope);
2514 // Make a copy in case GetLookAheadToken invalidates the result of NextToken.
2515 Token AfterScope = HasScope ? NextToken() : Tok;
2517 // Determine whether the following tokens could possibly be a
2519 bool MightBeDeclarator = true;
2520 if (Tok.isOneOf(tok::kw_typename, tok::annot_typename)) {
2521 // A declarator-id can't start with 'typename'.
2522 MightBeDeclarator = false;
2523 } else if (AfterScope.is(tok::annot_template_id)) {
2524 // If we have a type expressed as a template-id, this cannot be a
2525 // declarator-id (such a type cannot be redeclared in a simple-declaration).
2526 TemplateIdAnnotation *Annot =
2527 static_cast<TemplateIdAnnotation *>(AfterScope.getAnnotationValue());
2528 if (Annot->Kind == TNK_Type_template)
2529 MightBeDeclarator = false;
2530 } else if (AfterScope.is(tok::identifier)) {
2531 const Token &Next = HasScope ? GetLookAheadToken(2) : NextToken();
2533 // These tokens cannot come after the declarator-id in a
2534 // simple-declaration, and are likely to come after a type-specifier.
2535 if (Next.isOneOf(tok::star, tok::amp, tok::ampamp, tok::identifier,
2536 tok::annot_cxxscope, tok::coloncolon)) {
2537 // Missing a semicolon.
2538 MightBeDeclarator = false;
2539 } else if (HasScope) {
2540 // If the declarator-id has a scope specifier, it must redeclare a
2541 // previously-declared entity. If that's a type (and this is not a
2542 // typedef), that's an error.
2544 Actions.RestoreNestedNameSpecifierAnnotation(
2545 Tok.getAnnotationValue(), Tok.getAnnotationRange(), SS);
2546 IdentifierInfo *Name = AfterScope.getIdentifierInfo();
2547 Sema::NameClassification Classification = Actions.ClassifyName(
2548 getCurScope(), SS, Name, AfterScope.getLocation(), Next,
2549 /*IsAddressOfOperand*/false);
2550 switch (Classification.getKind()) {
2551 case Sema::NC_Error:
2552 SkipMalformedDecl();
2555 case Sema::NC_Keyword:
2556 case Sema::NC_NestedNameSpecifier:
2557 llvm_unreachable("typo correction and nested name specifiers not "
2561 case Sema::NC_TypeTemplate:
2562 // Not a previously-declared non-type entity.
2563 MightBeDeclarator = false;
2566 case Sema::NC_Unknown:
2567 case Sema::NC_Expression:
2568 case Sema::NC_VarTemplate:
2569 case Sema::NC_FunctionTemplate:
2570 // Might be a redeclaration of a prior entity.
2576 if (MightBeDeclarator)
2579 const PrintingPolicy &PPol = Actions.getASTContext().getPrintingPolicy();
2580 Diag(PP.getLocForEndOfToken(DS.getRepAsDecl()->getLocEnd()),
2581 diag::err_expected_after)
2582 << DeclSpec::getSpecifierName(DS.getTypeSpecType(), PPol) << tok::semi;
2584 // Try to recover from the typo, by dropping the tag definition and parsing
2585 // the problematic tokens as a type.
2587 // FIXME: Split the DeclSpec into pieces for the standalone
2588 // declaration and pieces for the following declaration, instead
2589 // of assuming that all the other pieces attach to new declaration,
2590 // and call ParsedFreeStandingDeclSpec as appropriate.
2591 DS.ClearTypeSpecType();
2592 ParsedTemplateInfo NotATemplate;
2593 ParseDeclarationSpecifiers(DS, NotATemplate, AS, DSContext, LateAttrs);
2597 /// ParseDeclarationSpecifiers
2598 /// declaration-specifiers: [C99 6.7]
2599 /// storage-class-specifier declaration-specifiers[opt]
2600 /// type-specifier declaration-specifiers[opt]
2601 /// [C99] function-specifier declaration-specifiers[opt]
2602 /// [C11] alignment-specifier declaration-specifiers[opt]
2603 /// [GNU] attributes declaration-specifiers[opt]
2604 /// [Clang] '__module_private__' declaration-specifiers[opt]
2606 /// storage-class-specifier: [C99 6.7.1]
2613 /// [C++11] 'thread_local'
2614 /// [C11] '_Thread_local'
2615 /// [GNU] '__thread'
2616 /// function-specifier: [C99 6.7.4]
2619 /// [C++] 'explicit'
2620 /// [OpenCL] '__kernel'
2621 /// 'friend': [C++ dcl.friend]
2622 /// 'constexpr': [C++0x dcl.constexpr]
2625 void Parser::ParseDeclarationSpecifiers(DeclSpec &DS,
2626 const ParsedTemplateInfo &TemplateInfo,
2628 DeclSpecContext DSContext,
2629 LateParsedAttrList *LateAttrs) {
2630 if (DS.getSourceRange().isInvalid()) {
2631 // Start the range at the current token but make the end of the range
2632 // invalid. This will make the entire range invalid unless we successfully
2634 DS.SetRangeStart(Tok.getLocation());
2635 DS.SetRangeEnd(SourceLocation());
2638 bool EnteringContext = (DSContext == DSC_class || DSContext == DSC_top_level);
2639 bool AttrsLastTime = false;
2640 ParsedAttributesWithRange attrs(AttrFactory);
2641 // We use Sema's policy to get bool macros right.
2642 const PrintingPolicy &Policy = Actions.getPrintingPolicy();
2644 bool isInvalid = false;
2645 bool isStorageClass = false;
2646 const char *PrevSpec = nullptr;
2647 unsigned DiagID = 0;
2649 SourceLocation Loc = Tok.getLocation();
2651 switch (Tok.getKind()) {
2655 ProhibitAttributes(attrs);
2657 // Reject C++11 attributes that appertain to decl specifiers as
2658 // we don't support any C++11 attributes that appertain to decl
2659 // specifiers. This also conforms to what g++ 4.8 is doing.
2660 ProhibitCXX11Attributes(attrs);
2662 DS.takeAttributesFrom(attrs);
2665 // If this is not a declaration specifier token, we're done reading decl
2666 // specifiers. First verify that DeclSpec's are consistent.
2667 DS.Finish(Diags, PP, Policy);
2671 case tok::kw_alignas:
2672 if (!getLangOpts().CPlusPlus11 || !isCXX11AttributeSpecifier())
2673 goto DoneWithDeclSpec;
2675 ProhibitAttributes(attrs);
2676 // FIXME: It would be good to recover by accepting the attributes,
2677 // but attempting to do that now would cause serious
2678 // madness in terms of diagnostics.
2680 attrs.Range = SourceRange();
2682 ParseCXX11Attributes(attrs);
2683 AttrsLastTime = true;
2686 case tok::code_completion: {
2687 Sema::ParserCompletionContext CCC = Sema::PCC_Namespace;
2688 if (DS.hasTypeSpecifier()) {
2689 bool AllowNonIdentifiers
2690 = (getCurScope()->getFlags() & (Scope::ControlScope |
2692 Scope::TemplateParamScope |
2693 Scope::FunctionPrototypeScope |
2694 Scope::AtCatchScope)) == 0;
2695 bool AllowNestedNameSpecifiers
2696 = DSContext == DSC_top_level ||
2697 (DSContext == DSC_class && DS.isFriendSpecified());
2699 Actions.CodeCompleteDeclSpec(getCurScope(), DS,
2700 AllowNonIdentifiers,
2701 AllowNestedNameSpecifiers);
2702 return cutOffParsing();
2705 if (getCurScope()->getFnParent() || getCurScope()->getBlockParent())
2706 CCC = Sema::PCC_LocalDeclarationSpecifiers;
2707 else if (TemplateInfo.Kind != ParsedTemplateInfo::NonTemplate)
2708 CCC = DSContext == DSC_class? Sema::PCC_MemberTemplate
2709 : Sema::PCC_Template;
2710 else if (DSContext == DSC_class)
2711 CCC = Sema::PCC_Class;
2712 else if (CurParsedObjCImpl)
2713 CCC = Sema::PCC_ObjCImplementation;
2715 Actions.CodeCompleteOrdinaryName(getCurScope(), CCC);
2716 return cutOffParsing();
2719 case tok::coloncolon: // ::foo::bar
2720 // C++ scope specifier. Annotate and loop, or bail out on error.
2721 if (TryAnnotateCXXScopeToken(EnteringContext)) {
2722 if (!DS.hasTypeSpecifier())
2723 DS.SetTypeSpecError();
2724 goto DoneWithDeclSpec;
2726 if (Tok.is(tok::coloncolon)) // ::new or ::delete
2727 goto DoneWithDeclSpec;
2730 case tok::annot_cxxscope: {
2731 if (DS.hasTypeSpecifier() || DS.isTypeAltiVecVector())
2732 goto DoneWithDeclSpec;
2735 Actions.RestoreNestedNameSpecifierAnnotation(Tok.getAnnotationValue(),
2736 Tok.getAnnotationRange(),
2739 // We are looking for a qualified typename.
2740 Token Next = NextToken();
2741 if (Next.is(tok::annot_template_id) &&
2742 static_cast<TemplateIdAnnotation *>(Next.getAnnotationValue())
2743 ->Kind == TNK_Type_template) {
2744 // We have a qualified template-id, e.g., N::A<int>
2746 // C++ [class.qual]p2:
2747 // In a lookup in which the constructor is an acceptable lookup
2748 // result and the nested-name-specifier nominates a class C:
2750 // - if the name specified after the
2751 // nested-name-specifier, when looked up in C, is the
2752 // injected-class-name of C (Clause 9), or
2754 // - if the name specified after the nested-name-specifier
2755 // is the same as the identifier or the
2756 // simple-template-id's template-name in the last
2757 // component of the nested-name-specifier,
2759 // the name is instead considered to name the constructor of
2762 // Thus, if the template-name is actually the constructor
2763 // name, then the code is ill-formed; this interpretation is
2764 // reinforced by the NAD status of core issue 635.
2765 TemplateIdAnnotation *TemplateId = takeTemplateIdAnnotation(Next);
2766 if ((DSContext == DSC_top_level || DSContext == DSC_class) &&
2768 Actions.isCurrentClassName(*TemplateId->Name, getCurScope(), &SS)) {
2769 if (isConstructorDeclarator(/*Unqualified*/false)) {
2770 // The user meant this to be an out-of-line constructor
2771 // definition, but template arguments are not allowed
2772 // there. Just allow this as a constructor; we'll
2773 // complain about it later.
2774 goto DoneWithDeclSpec;
2777 // The user meant this to name a type, but it actually names
2778 // a constructor with some extraneous template
2779 // arguments. Complain, then parse it as a type as the user
2781 Diag(TemplateId->TemplateNameLoc,
2782 diag::err_out_of_line_template_id_names_constructor)
2783 << TemplateId->Name;
2786 DS.getTypeSpecScope() = SS;
2787 ConsumeToken(); // The C++ scope.
2788 assert(Tok.is(tok::annot_template_id) &&
2789 "ParseOptionalCXXScopeSpecifier not working");
2790 AnnotateTemplateIdTokenAsType();
2794 if (Next.is(tok::annot_typename)) {
2795 DS.getTypeSpecScope() = SS;
2796 ConsumeToken(); // The C++ scope.
2797 if (Tok.getAnnotationValue()) {
2798 ParsedType T = getTypeAnnotation(Tok);
2799 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_typename,
2800 Tok.getAnnotationEndLoc(),
2801 PrevSpec, DiagID, T, Policy);
2806 DS.SetTypeSpecError();
2807 DS.SetRangeEnd(Tok.getAnnotationEndLoc());
2808 ConsumeToken(); // The typename
2811 if (Next.isNot(tok::identifier))
2812 goto DoneWithDeclSpec;
2814 // If we're in a context where the identifier could be a class name,
2815 // check whether this is a constructor declaration.
2816 if ((DSContext == DSC_top_level || DSContext == DSC_class) &&
2817 Actions.isCurrentClassName(*Next.getIdentifierInfo(), getCurScope(),
2819 if (isConstructorDeclarator(/*Unqualified*/false))
2820 goto DoneWithDeclSpec;
2822 // As noted in C++ [class.qual]p2 (cited above), when the name
2823 // of the class is qualified in a context where it could name
2824 // a constructor, its a constructor name. However, we've
2825 // looked at the declarator, and the user probably meant this
2826 // to be a type. Complain that it isn't supposed to be treated
2827 // as a type, then proceed to parse it as a type.
2828 Diag(Next.getLocation(), diag::err_out_of_line_type_names_constructor)
2829 << Next.getIdentifierInfo();
2832 ParsedType TypeRep = Actions.getTypeName(*Next.getIdentifierInfo(),
2835 false, false, ParsedType(),
2836 /*IsCtorOrDtorName=*/false,
2837 /*NonTrivialSourceInfo=*/true);
2839 // If the referenced identifier is not a type, then this declspec is
2840 // erroneous: We already checked about that it has no type specifier, and
2841 // C++ doesn't have implicit int. Diagnose it as a typo w.r.t. to the
2844 ConsumeToken(); // Eat the scope spec so the identifier is current.
2845 ParsedAttributesWithRange Attrs(AttrFactory);
2846 if (ParseImplicitInt(DS, &SS, TemplateInfo, AS, DSContext, Attrs)) {
2847 if (!Attrs.empty()) {
2848 AttrsLastTime = true;
2849 attrs.takeAllFrom(Attrs);
2853 goto DoneWithDeclSpec;
2856 DS.getTypeSpecScope() = SS;
2857 ConsumeToken(); // The C++ scope.
2859 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_typename, Loc, PrevSpec,
2860 DiagID, TypeRep, Policy);
2864 DS.SetRangeEnd(Tok.getLocation());
2865 ConsumeToken(); // The typename.
2870 case tok::annot_typename: {
2871 // If we've previously seen a tag definition, we were almost surely
2872 // missing a semicolon after it.
2873 if (DS.hasTypeSpecifier() && DS.hasTagDefinition())
2874 goto DoneWithDeclSpec;
2876 if (Tok.getAnnotationValue()) {
2877 ParsedType T = getTypeAnnotation(Tok);
2878 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_typename, Loc, PrevSpec,
2881 DS.SetTypeSpecError();
2886 DS.SetRangeEnd(Tok.getAnnotationEndLoc());
2887 ConsumeToken(); // The typename
2889 // Objective-C supports syntax of the form 'id<proto1,proto2>' where 'id'
2890 // is a specific typedef and 'itf<proto1,proto2>' where 'itf' is an
2891 // Objective-C interface.
2892 if (Tok.is(tok::less) && getLangOpts().ObjC1)
2893 ParseObjCProtocolQualifiers(DS);
2898 case tok::kw___is_signed:
2899 // GNU libstdc++ 4.4 uses __is_signed as an identifier, but Clang
2900 // typically treats it as a trait. If we see __is_signed as it appears
2901 // in libstdc++, e.g.,
2903 // static const bool __is_signed;
2905 // then treat __is_signed as an identifier rather than as a keyword.
2906 if (DS.getTypeSpecType() == TST_bool &&
2907 DS.getTypeQualifiers() == DeclSpec::TQ_const &&
2908 DS.getStorageClassSpec() == DeclSpec::SCS_static)
2909 TryKeywordIdentFallback(true);
2911 // We're done with the declaration-specifiers.
2912 goto DoneWithDeclSpec;
2915 case tok::kw___super:
2916 case tok::kw_decltype:
2917 case tok::identifier: {
2918 // This identifier can only be a typedef name if we haven't already seen
2919 // a type-specifier. Without this check we misparse:
2920 // typedef int X; struct Y { short X; }; as 'short int'.
2921 if (DS.hasTypeSpecifier())
2922 goto DoneWithDeclSpec;
2924 // In C++, check to see if this is a scope specifier like foo::bar::, if
2925 // so handle it as such. This is important for ctor parsing.
2926 if (getLangOpts().CPlusPlus) {
2927 if (TryAnnotateCXXScopeToken(EnteringContext)) {
2928 DS.SetTypeSpecError();
2929 goto DoneWithDeclSpec;
2931 if (!Tok.is(tok::identifier))
2935 // Check for need to substitute AltiVec keyword tokens.
2936 if (TryAltiVecToken(DS, Loc, PrevSpec, DiagID, isInvalid))
2939 // [AltiVec] 2.2: [If the 'vector' specifier is used] The syntax does not
2940 // allow the use of a typedef name as a type specifier.
2941 if (DS.isTypeAltiVecVector())
2942 goto DoneWithDeclSpec;
2944 if (DSContext == DSC_objc_method_result && isObjCInstancetype()) {
2945 ParsedType TypeRep = Actions.ActOnObjCInstanceType(Loc);
2947 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_typename, Loc, PrevSpec,
2948 DiagID, TypeRep, Policy);
2952 DS.SetRangeEnd(Loc);
2957 ParsedType TypeRep =
2958 Actions.getTypeName(*Tok.getIdentifierInfo(),
2959 Tok.getLocation(), getCurScope());
2961 // MSVC: If we weren't able to parse a default template argument, and it's
2962 // just a simple identifier, create a DependentNameType. This will allow
2963 // us to defer the name lookup to template instantiation time, as long we
2964 // forge a NestedNameSpecifier for the current context.
2965 if (!TypeRep && DSContext == DSC_template_type_arg &&
2966 getLangOpts().MSVCCompat && getCurScope()->isTemplateParamScope()) {
2967 TypeRep = Actions.ActOnDelayedDefaultTemplateArg(
2968 *Tok.getIdentifierInfo(), Tok.getLocation());
2971 // If this is not a typedef name, don't parse it as part of the declspec,
2972 // it must be an implicit int or an error.
2974 ParsedAttributesWithRange Attrs(AttrFactory);
2975 if (ParseImplicitInt(DS, nullptr, TemplateInfo, AS, DSContext, Attrs)) {
2976 if (!Attrs.empty()) {
2977 AttrsLastTime = true;
2978 attrs.takeAllFrom(Attrs);
2982 goto DoneWithDeclSpec;
2985 // If we're in a context where the identifier could be a class name,
2986 // check whether this is a constructor declaration.
2987 if (getLangOpts().CPlusPlus && DSContext == DSC_class &&
2988 Actions.isCurrentClassName(*Tok.getIdentifierInfo(), getCurScope()) &&
2989 isConstructorDeclarator(/*Unqualified*/true))
2990 goto DoneWithDeclSpec;
2992 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_typename, Loc, PrevSpec,
2993 DiagID, TypeRep, Policy);
2997 DS.SetRangeEnd(Tok.getLocation());
2998 ConsumeToken(); // The identifier
3000 // Objective-C supports syntax of the form 'id<proto1,proto2>' where 'id'
3001 // is a specific typedef and 'itf<proto1,proto2>' where 'itf' is an
3002 // Objective-C interface.
3003 if (Tok.is(tok::less) && getLangOpts().ObjC1)
3004 ParseObjCProtocolQualifiers(DS);
3006 // Need to support trailing type qualifiers (e.g. "id<p> const").
3007 // If a type specifier follows, it will be diagnosed elsewhere.
3012 case tok::annot_template_id: {
3013 TemplateIdAnnotation *TemplateId = takeTemplateIdAnnotation(Tok);
3014 if (TemplateId->Kind != TNK_Type_template) {
3015 // This template-id does not refer to a type name, so we're
3016 // done with the type-specifiers.
3017 goto DoneWithDeclSpec;
3020 // If we're in a context where the template-id could be a
3021 // constructor name or specialization, check whether this is a
3022 // constructor declaration.
3023 if (getLangOpts().CPlusPlus && DSContext == DSC_class &&
3024 Actions.isCurrentClassName(*TemplateId->Name, getCurScope()) &&
3025 isConstructorDeclarator(TemplateId->SS.isEmpty()))
3026 goto DoneWithDeclSpec;
3028 // Turn the template-id annotation token into a type annotation
3029 // token, then try again to parse it as a type-specifier.
3030 AnnotateTemplateIdTokenAsType();
3034 // GNU attributes support.
3035 case tok::kw___attribute:
3036 ParseGNUAttributes(DS.getAttributes(), nullptr, LateAttrs);
3039 // Microsoft declspec support.
3040 case tok::kw___declspec:
3041 ParseMicrosoftDeclSpecs(DS.getAttributes());
3044 // Microsoft single token adornments.
3045 case tok::kw___forceinline: {
3046 isInvalid = DS.setFunctionSpecForceInline(Loc, PrevSpec, DiagID);
3047 IdentifierInfo *AttrName = Tok.getIdentifierInfo();
3048 SourceLocation AttrNameLoc = Tok.getLocation();
3049 DS.getAttributes().addNew(AttrName, AttrNameLoc, nullptr, AttrNameLoc,
3050 nullptr, 0, AttributeList::AS_Keyword);
3054 case tok::kw___sptr:
3055 case tok::kw___uptr:
3056 case tok::kw___ptr64:
3057 case tok::kw___ptr32:
3059 case tok::kw___cdecl:
3060 case tok::kw___stdcall:
3061 case tok::kw___fastcall:
3062 case tok::kw___thiscall:
3063 case tok::kw___vectorcall:
3064 case tok::kw___unaligned:
3065 ParseMicrosoftTypeAttributes(DS.getAttributes());
3068 // Borland single token adornments.
3069 case tok::kw___pascal:
3070 ParseBorlandTypeAttributes(DS.getAttributes());
3073 // OpenCL single token adornments.
3074 case tok::kw___kernel:
3075 ParseOpenCLAttributes(DS.getAttributes());
3078 // Nullability type specifiers.
3079 case tok::kw___nonnull:
3080 case tok::kw___nullable:
3081 case tok::kw___null_unspecified:
3082 ParseNullabilityTypeSpecifiers(DS.getAttributes());
3085 // storage-class-specifier
3086 case tok::kw_typedef:
3087 isInvalid = DS.SetStorageClassSpec(Actions, DeclSpec::SCS_typedef, Loc,
3088 PrevSpec, DiagID, Policy);
3089 isStorageClass = true;
3091 case tok::kw_extern:
3092 if (DS.getThreadStorageClassSpec() == DeclSpec::TSCS___thread)
3093 Diag(Tok, diag::ext_thread_before) << "extern";
3094 isInvalid = DS.SetStorageClassSpec(Actions, DeclSpec::SCS_extern, Loc,
3095 PrevSpec, DiagID, Policy);
3096 isStorageClass = true;
3098 case tok::kw___private_extern__:
3099 isInvalid = DS.SetStorageClassSpec(Actions, DeclSpec::SCS_private_extern,
3100 Loc, PrevSpec, DiagID, Policy);
3101 isStorageClass = true;
3103 case tok::kw_static:
3104 if (DS.getThreadStorageClassSpec() == DeclSpec::TSCS___thread)
3105 Diag(Tok, diag::ext_thread_before) << "static";
3106 isInvalid = DS.SetStorageClassSpec(Actions, DeclSpec::SCS_static, Loc,
3107 PrevSpec, DiagID, Policy);
3108 isStorageClass = true;
3111 if (getLangOpts().CPlusPlus11) {
3112 if (isKnownToBeTypeSpecifier(GetLookAheadToken(1))) {
3113 isInvalid = DS.SetStorageClassSpec(Actions, DeclSpec::SCS_auto, Loc,
3114 PrevSpec, DiagID, Policy);
3116 Diag(Tok, diag::ext_auto_storage_class)
3117 << FixItHint::CreateRemoval(DS.getStorageClassSpecLoc());
3119 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_auto, Loc, PrevSpec,
3122 isInvalid = DS.SetStorageClassSpec(Actions, DeclSpec::SCS_auto, Loc,
3123 PrevSpec, DiagID, Policy);
3124 isStorageClass = true;
3126 case tok::kw_register:
3127 isInvalid = DS.SetStorageClassSpec(Actions, DeclSpec::SCS_register, Loc,
3128 PrevSpec, DiagID, Policy);
3129 isStorageClass = true;
3131 case tok::kw_mutable:
3132 isInvalid = DS.SetStorageClassSpec(Actions, DeclSpec::SCS_mutable, Loc,
3133 PrevSpec, DiagID, Policy);
3134 isStorageClass = true;
3136 case tok::kw___thread:
3137 isInvalid = DS.SetStorageClassSpecThread(DeclSpec::TSCS___thread, Loc,
3139 isStorageClass = true;
3141 case tok::kw_thread_local:
3142 isInvalid = DS.SetStorageClassSpecThread(DeclSpec::TSCS_thread_local, Loc,
3145 case tok::kw__Thread_local:
3146 isInvalid = DS.SetStorageClassSpecThread(DeclSpec::TSCS__Thread_local,
3147 Loc, PrevSpec, DiagID);
3148 isStorageClass = true;
3151 // function-specifier
3152 case tok::kw_inline:
3153 isInvalid = DS.setFunctionSpecInline(Loc, PrevSpec, DiagID);
3155 case tok::kw_virtual:
3156 isInvalid = DS.setFunctionSpecVirtual(Loc, PrevSpec, DiagID);
3158 case tok::kw_explicit:
3159 isInvalid = DS.setFunctionSpecExplicit(Loc, PrevSpec, DiagID);
3161 case tok::kw__Noreturn:
3162 if (!getLangOpts().C11)
3163 Diag(Loc, diag::ext_c11_noreturn);
3164 isInvalid = DS.setFunctionSpecNoreturn(Loc, PrevSpec, DiagID);
3167 // alignment-specifier
3168 case tok::kw__Alignas:
3169 if (!getLangOpts().C11)
3170 Diag(Tok, diag::ext_c11_alignment) << Tok.getName();
3171 ParseAlignmentSpecifier(DS.getAttributes());
3175 case tok::kw_friend:
3176 if (DSContext == DSC_class)
3177 isInvalid = DS.SetFriendSpec(Loc, PrevSpec, DiagID);
3179 PrevSpec = ""; // not actually used by the diagnostic
3180 DiagID = diag::err_friend_invalid_in_context;
3186 case tok::kw___module_private__:
3187 isInvalid = DS.setModulePrivateSpec(Loc, PrevSpec, DiagID);
3191 case tok::kw_constexpr:
3192 isInvalid = DS.SetConstexprSpec(Loc, PrevSpec, DiagID);
3197 isInvalid = DS.SetTypeSpecWidth(DeclSpec::TSW_short, Loc, PrevSpec,
3201 if (DS.getTypeSpecWidth() != DeclSpec::TSW_long)
3202 isInvalid = DS.SetTypeSpecWidth(DeclSpec::TSW_long, Loc, PrevSpec,
3205 isInvalid = DS.SetTypeSpecWidth(DeclSpec::TSW_longlong, Loc, PrevSpec,
3208 case tok::kw___int64:
3209 isInvalid = DS.SetTypeSpecWidth(DeclSpec::TSW_longlong, Loc, PrevSpec,
3212 case tok::kw_signed:
3213 isInvalid = DS.SetTypeSpecSign(DeclSpec::TSS_signed, Loc, PrevSpec,
3216 case tok::kw_unsigned:
3217 isInvalid = DS.SetTypeSpecSign(DeclSpec::TSS_unsigned, Loc, PrevSpec,
3220 case tok::kw__Complex:
3221 isInvalid = DS.SetTypeSpecComplex(DeclSpec::TSC_complex, Loc, PrevSpec,
3224 case tok::kw__Imaginary:
3225 isInvalid = DS.SetTypeSpecComplex(DeclSpec::TSC_imaginary, Loc, PrevSpec,
3229 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_void, Loc, PrevSpec,
3233 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_char, Loc, PrevSpec,
3237 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_int, Loc, PrevSpec,
3240 case tok::kw___int128:
3241 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_int128, Loc, PrevSpec,
3245 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_half, Loc, PrevSpec,
3249 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_float, Loc, PrevSpec,
3252 case tok::kw_double:
3253 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_double, Loc, PrevSpec,
3256 case tok::kw_wchar_t:
3257 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_wchar, Loc, PrevSpec,
3260 case tok::kw_char16_t:
3261 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_char16, Loc, PrevSpec,
3264 case tok::kw_char32_t:
3265 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_char32, Loc, PrevSpec,
3270 if (Tok.is(tok::kw_bool) &&
3271 DS.getTypeSpecType() != DeclSpec::TST_unspecified &&
3272 DS.getStorageClassSpec() == DeclSpec::SCS_typedef) {
3273 PrevSpec = ""; // Not used by the diagnostic.
3274 DiagID = diag::err_bool_redeclaration;
3275 // For better error recovery.
3276 Tok.setKind(tok::identifier);
3279 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_bool, Loc, PrevSpec,
3283 case tok::kw__Decimal32:
3284 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_decimal32, Loc, PrevSpec,
3287 case tok::kw__Decimal64:
3288 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_decimal64, Loc, PrevSpec,
3291 case tok::kw__Decimal128:
3292 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_decimal128, Loc, PrevSpec,
3295 case tok::kw___vector:
3296 isInvalid = DS.SetTypeAltiVecVector(true, Loc, PrevSpec, DiagID, Policy);
3298 case tok::kw___pixel:
3299 isInvalid = DS.SetTypeAltiVecPixel(true, Loc, PrevSpec, DiagID, Policy);
3301 case tok::kw___bool:
3302 isInvalid = DS.SetTypeAltiVecBool(true, Loc, PrevSpec, DiagID, Policy);
3304 case tok::kw___unknown_anytype:
3305 isInvalid = DS.SetTypeSpecType(TST_unknown_anytype, Loc,
3306 PrevSpec, DiagID, Policy);
3311 case tok::kw_struct:
3312 case tok::kw___interface:
3313 case tok::kw_union: {
3314 tok::TokenKind Kind = Tok.getKind();
3317 // These are attributes following class specifiers.
3318 // To produce better diagnostic, we parse them when
3319 // parsing class specifier.
3320 ParsedAttributesWithRange Attributes(AttrFactory);
3321 ParseClassSpecifier(Kind, Loc, DS, TemplateInfo, AS,
3322 EnteringContext, DSContext, Attributes);
3324 // If there are attributes following class specifier,
3325 // take them over and handle them here.
3326 if (!Attributes.empty()) {
3327 AttrsLastTime = true;
3328 attrs.takeAllFrom(Attributes);
3336 ParseEnumSpecifier(Loc, DS, TemplateInfo, AS, DSContext);
3341 isInvalid = DS.SetTypeQual(DeclSpec::TQ_const, Loc, PrevSpec, DiagID,
3344 case tok::kw_volatile:
3345 isInvalid = DS.SetTypeQual(DeclSpec::TQ_volatile, Loc, PrevSpec, DiagID,
3348 case tok::kw_restrict:
3349 isInvalid = DS.SetTypeQual(DeclSpec::TQ_restrict, Loc, PrevSpec, DiagID,
3353 // C++ typename-specifier:
3354 case tok::kw_typename:
3355 if (TryAnnotateTypeOrScopeToken()) {
3356 DS.SetTypeSpecError();
3357 goto DoneWithDeclSpec;
3359 if (!Tok.is(tok::kw_typename))
3363 // GNU typeof support.
3364 case tok::kw_typeof:
3365 ParseTypeofSpecifier(DS);
3368 case tok::annot_decltype:
3369 ParseDecltypeSpecifier(DS);
3372 case tok::kw___underlying_type:
3373 ParseUnderlyingTypeSpecifier(DS);
3376 case tok::kw__Atomic:
3378 // If the _Atomic keyword is immediately followed by a left parenthesis,
3379 // it is interpreted as a type specifier (with a type name), not as a
3381 if (NextToken().is(tok::l_paren)) {
3382 ParseAtomicSpecifier(DS);
3385 isInvalid = DS.SetTypeQual(DeclSpec::TQ_atomic, Loc, PrevSpec, DiagID,
3389 // OpenCL qualifiers:
3390 case tok::kw___generic:
3391 // generic address space is introduced only in OpenCL v2.0
3392 // see OpenCL C Spec v2.0 s6.5.5
3393 if (Actions.getLangOpts().OpenCLVersion < 200) {
3394 DiagID = diag::err_opencl_unknown_type_specifier;
3395 PrevSpec = Tok.getIdentifierInfo()->getNameStart();
3399 case tok::kw___private:
3400 case tok::kw___global:
3401 case tok::kw___local:
3402 case tok::kw___constant:
3403 case tok::kw___read_only:
3404 case tok::kw___write_only:
3405 case tok::kw___read_write:
3406 ParseOpenCLQualifiers(DS.getAttributes());
3410 // GCC ObjC supports types like "<SomeProtocol>" as a synonym for
3411 // "id<SomeProtocol>". This is hopelessly old fashioned and dangerous,
3412 // but we support it.
3413 if (DS.hasTypeSpecifier() || !getLangOpts().ObjC1)
3414 goto DoneWithDeclSpec;
3416 if (!ParseObjCProtocolQualifiers(DS))
3417 Diag(Loc, diag::warn_objc_protocol_qualifier_missing_id)
3418 << FixItHint::CreateInsertion(Loc, "id")
3419 << SourceRange(Loc, DS.getSourceRange().getEnd());
3421 // Need to support trailing type qualifiers (e.g. "id<p> const").
3422 // If a type specifier follows, it will be diagnosed elsewhere.
3425 // If the specifier wasn't legal, issue a diagnostic.
3427 assert(PrevSpec && "Method did not return previous specifier!");
3430 if (DiagID == diag::ext_duplicate_declspec)
3432 << PrevSpec << FixItHint::CreateRemoval(Tok.getLocation());
3433 else if (DiagID == diag::err_opencl_unknown_type_specifier)
3434 Diag(Tok, DiagID) << PrevSpec << isStorageClass;
3436 Diag(Tok, DiagID) << PrevSpec;
3439 DS.SetRangeEnd(Tok.getLocation());
3440 if (DiagID != diag::err_bool_redeclaration)
3443 AttrsLastTime = false;
3447 /// ParseStructDeclaration - Parse a struct declaration without the terminating
3450 /// struct-declaration:
3451 /// specifier-qualifier-list struct-declarator-list
3452 /// [GNU] __extension__ struct-declaration
3453 /// [GNU] specifier-qualifier-list
3454 /// struct-declarator-list:
3455 /// struct-declarator
3456 /// struct-declarator-list ',' struct-declarator
3457 /// [GNU] struct-declarator-list ',' attributes[opt] struct-declarator
3458 /// struct-declarator:
3460 /// [GNU] declarator attributes[opt]
3461 /// declarator[opt] ':' constant-expression
3462 /// [GNU] declarator[opt] ':' constant-expression attributes[opt]
3464 void Parser::ParseStructDeclaration(
3465 ParsingDeclSpec &DS,
3466 llvm::function_ref<void(ParsingFieldDeclarator &)> FieldsCallback) {
3468 if (Tok.is(tok::kw___extension__)) {
3469 // __extension__ silences extension warnings in the subexpression.
3470 ExtensionRAIIObject O(Diags); // Use RAII to do this.
3472 return ParseStructDeclaration(DS, FieldsCallback);
3475 // Parse the common specifier-qualifiers-list piece.
3476 ParseSpecifierQualifierList(DS);
3478 // If there are no declarators, this is a free-standing declaration
3479 // specifier. Let the actions module cope with it.
3480 if (Tok.is(tok::semi)) {
3481 Decl *TheDecl = Actions.ParsedFreeStandingDeclSpec(getCurScope(), AS_none,
3483 DS.complete(TheDecl);
3487 // Read struct-declarators until we find the semicolon.
3488 bool FirstDeclarator = true;
3489 SourceLocation CommaLoc;
3491 ParsingFieldDeclarator DeclaratorInfo(*this, DS);
3492 DeclaratorInfo.D.setCommaLoc(CommaLoc);
3494 // Attributes are only allowed here on successive declarators.
3495 if (!FirstDeclarator)
3496 MaybeParseGNUAttributes(DeclaratorInfo.D);
3498 /// struct-declarator: declarator
3499 /// struct-declarator: declarator[opt] ':' constant-expression
3500 if (Tok.isNot(tok::colon)) {
3501 // Don't parse FOO:BAR as if it were a typo for FOO::BAR.
3502 ColonProtectionRAIIObject X(*this);
3503 ParseDeclarator(DeclaratorInfo.D);
3505 DeclaratorInfo.D.SetIdentifier(nullptr, Tok.getLocation());
3507 if (TryConsumeToken(tok::colon)) {
3508 ExprResult Res(ParseConstantExpression());
3509 if (Res.isInvalid())
3510 SkipUntil(tok::semi, StopBeforeMatch);
3512 DeclaratorInfo.BitfieldSize = Res.get();
3515 // If attributes exist after the declarator, parse them.
3516 MaybeParseGNUAttributes(DeclaratorInfo.D);
3518 // We're done with this declarator; invoke the callback.
3519 FieldsCallback(DeclaratorInfo);
3521 // If we don't have a comma, it is either the end of the list (a ';')
3522 // or an error, bail out.
3523 if (!TryConsumeToken(tok::comma, CommaLoc))
3526 FirstDeclarator = false;
3530 /// ParseStructUnionBody
3531 /// struct-contents:
3532 /// struct-declaration-list
3534 /// [GNU] "struct-declaration-list" without terminatoring ';'
3535 /// struct-declaration-list:
3536 /// struct-declaration
3537 /// struct-declaration-list struct-declaration
3538 /// [OBC] '@' 'defs' '(' class-name ')'
3540 void Parser::ParseStructUnionBody(SourceLocation RecordLoc,
3541 unsigned TagType, Decl *TagDecl) {
3542 PrettyDeclStackTraceEntry CrashInfo(Actions, TagDecl, RecordLoc,
3543 "parsing struct/union body");
3544 assert(!getLangOpts().CPlusPlus && "C++ declarations not supported");
3546 BalancedDelimiterTracker T(*this, tok::l_brace);
3547 if (T.consumeOpen())
3550 ParseScope StructScope(this, Scope::ClassScope|Scope::DeclScope);
3551 Actions.ActOnTagStartDefinition(getCurScope(), TagDecl);
3553 SmallVector<Decl *, 32> FieldDecls;
3555 // While we still have something to read, read the declarations in the struct.
3556 while (Tok.isNot(tok::r_brace) && !isEofOrEom()) {
3557 // Each iteration of this loop reads one struct-declaration.
3559 // Check for extraneous top-level semicolon.
3560 if (Tok.is(tok::semi)) {
3561 ConsumeExtraSemi(InsideStruct, TagType);
3565 // Parse _Static_assert declaration.
3566 if (Tok.is(tok::kw__Static_assert)) {
3567 SourceLocation DeclEnd;
3568 ParseStaticAssertDeclaration(DeclEnd);
3572 if (Tok.is(tok::annot_pragma_pack)) {
3577 if (Tok.is(tok::annot_pragma_align)) {
3578 HandlePragmaAlign();
3582 if (!Tok.is(tok::at)) {
3583 auto CFieldCallback = [&](ParsingFieldDeclarator &FD) {
3584 // Install the declarator into the current TagDecl.
3586 Actions.ActOnField(getCurScope(), TagDecl,
3587 FD.D.getDeclSpec().getSourceRange().getBegin(),
3588 FD.D, FD.BitfieldSize);
3589 FieldDecls.push_back(Field);
3593 // Parse all the comma separated declarators.
3594 ParsingDeclSpec DS(*this);
3595 ParseStructDeclaration(DS, CFieldCallback);
3596 } else { // Handle @defs
3598 if (!Tok.isObjCAtKeyword(tok::objc_defs)) {
3599 Diag(Tok, diag::err_unexpected_at);
3600 SkipUntil(tok::semi);
3604 ExpectAndConsume(tok::l_paren);
3605 if (!Tok.is(tok::identifier)) {
3606 Diag(Tok, diag::err_expected) << tok::identifier;
3607 SkipUntil(tok::semi);
3610 SmallVector<Decl *, 16> Fields;
3611 Actions.ActOnDefs(getCurScope(), TagDecl, Tok.getLocation(),
3612 Tok.getIdentifierInfo(), Fields);
3613 FieldDecls.insert(FieldDecls.end(), Fields.begin(), Fields.end());
3615 ExpectAndConsume(tok::r_paren);
3618 if (TryConsumeToken(tok::semi))
3621 if (Tok.is(tok::r_brace)) {
3622 ExpectAndConsume(tok::semi, diag::ext_expected_semi_decl_list);
3626 ExpectAndConsume(tok::semi, diag::err_expected_semi_decl_list);
3627 // Skip to end of block or statement to avoid ext-warning on extra ';'.
3628 SkipUntil(tok::r_brace, StopAtSemi | StopBeforeMatch);
3629 // If we stopped at a ';', eat it.
3630 TryConsumeToken(tok::semi);
3635 ParsedAttributes attrs(AttrFactory);
3636 // If attributes exist after struct contents, parse them.
3637 MaybeParseGNUAttributes(attrs);
3639 Actions.ActOnFields(getCurScope(),
3640 RecordLoc, TagDecl, FieldDecls,
3641 T.getOpenLocation(), T.getCloseLocation(),
3644 Actions.ActOnTagFinishDefinition(getCurScope(), TagDecl,
3645 T.getCloseLocation());
3648 /// ParseEnumSpecifier
3649 /// enum-specifier: [C99 6.7.2.2]
3650 /// 'enum' identifier[opt] '{' enumerator-list '}'
3651 ///[C99/C++]'enum' identifier[opt] '{' enumerator-list ',' '}'
3652 /// [GNU] 'enum' attributes[opt] identifier[opt] '{' enumerator-list ',' [opt]
3653 /// '}' attributes[opt]
3654 /// [MS] 'enum' __declspec[opt] identifier[opt] '{' enumerator-list ',' [opt]
3656 /// 'enum' identifier
3657 /// [GNU] 'enum' attributes[opt] identifier
3659 /// [C++11] enum-head '{' enumerator-list[opt] '}'
3660 /// [C++11] enum-head '{' enumerator-list ',' '}'
3662 /// enum-head: [C++11]
3663 /// enum-key attribute-specifier-seq[opt] identifier[opt] enum-base[opt]
3664 /// enum-key attribute-specifier-seq[opt] nested-name-specifier
3665 /// identifier enum-base[opt]
3667 /// enum-key: [C++11]
3672 /// enum-base: [C++11]
3673 /// ':' type-specifier-seq
3675 /// [C++] elaborated-type-specifier:
3676 /// [C++] 'enum' '::'[opt] nested-name-specifier[opt] identifier
3678 void Parser::ParseEnumSpecifier(SourceLocation StartLoc, DeclSpec &DS,
3679 const ParsedTemplateInfo &TemplateInfo,
3680 AccessSpecifier AS, DeclSpecContext DSC) {
3681 // Parse the tag portion of this.
3682 if (Tok.is(tok::code_completion)) {
3683 // Code completion for an enum name.
3684 Actions.CodeCompleteTag(getCurScope(), DeclSpec::TST_enum);
3685 return cutOffParsing();
3688 // If attributes exist after tag, parse them.
3689 ParsedAttributesWithRange attrs(AttrFactory);
3690 MaybeParseGNUAttributes(attrs);
3691 MaybeParseCXX11Attributes(attrs);
3692 MaybeParseMicrosoftDeclSpecs(attrs);
3694 SourceLocation ScopedEnumKWLoc;
3695 bool IsScopedUsingClassTag = false;
3697 // In C++11, recognize 'enum class' and 'enum struct'.
3698 if (Tok.isOneOf(tok::kw_class, tok::kw_struct)) {
3699 Diag(Tok, getLangOpts().CPlusPlus11 ? diag::warn_cxx98_compat_scoped_enum
3700 : diag::ext_scoped_enum);
3701 IsScopedUsingClassTag = Tok.is(tok::kw_class);
3702 ScopedEnumKWLoc = ConsumeToken();
3704 // Attributes are not allowed between these keywords. Diagnose,
3705 // but then just treat them like they appeared in the right place.
3706 ProhibitAttributes(attrs);
3708 // They are allowed afterwards, though.
3709 MaybeParseGNUAttributes(attrs);
3710 MaybeParseCXX11Attributes(attrs);
3711 MaybeParseMicrosoftDeclSpecs(attrs);
3714 // C++11 [temp.explicit]p12:
3715 // The usual access controls do not apply to names used to specify
3716 // explicit instantiations.
3717 // We extend this to also cover explicit specializations. Note that
3718 // we don't suppress if this turns out to be an elaborated type
3720 bool shouldDelayDiagsInTag =
3721 (TemplateInfo.Kind == ParsedTemplateInfo::ExplicitInstantiation ||
3722 TemplateInfo.Kind == ParsedTemplateInfo::ExplicitSpecialization);
3723 SuppressAccessChecks diagsFromTag(*this, shouldDelayDiagsInTag);
3725 // Enum definitions should not be parsed in a trailing-return-type.
3726 bool AllowDeclaration = DSC != DSC_trailing;
3728 bool AllowFixedUnderlyingType = AllowDeclaration &&
3729 (getLangOpts().CPlusPlus11 || getLangOpts().MicrosoftExt ||
3730 getLangOpts().ObjC2);
3732 CXXScopeSpec &SS = DS.getTypeSpecScope();
3733 if (getLangOpts().CPlusPlus) {
3734 // "enum foo : bar;" is not a potential typo for "enum foo::bar;"
3735 // if a fixed underlying type is allowed.
3736 ColonProtectionRAIIObject X(*this, AllowFixedUnderlyingType);
3739 if (ParseOptionalCXXScopeSpecifier(Spec, ParsedType(),
3740 /*EnteringContext=*/true))
3743 if (Spec.isSet() && Tok.isNot(tok::identifier)) {
3744 Diag(Tok, diag::err_expected) << tok::identifier;
3745 if (Tok.isNot(tok::l_brace)) {
3746 // Has no name and is not a definition.
3747 // Skip the rest of this declarator, up until the comma or semicolon.
3748 SkipUntil(tok::comma, StopAtSemi);
3756 // Must have either 'enum name' or 'enum {...}'.
3757 if (Tok.isNot(tok::identifier) && Tok.isNot(tok::l_brace) &&
3758 !(AllowFixedUnderlyingType && Tok.is(tok::colon))) {
3759 Diag(Tok, diag::err_expected_either) << tok::identifier << tok::l_brace;
3761 // Skip the rest of this declarator, up until the comma or semicolon.
3762 SkipUntil(tok::comma, StopAtSemi);
3766 // If an identifier is present, consume and remember it.
3767 IdentifierInfo *Name = nullptr;
3768 SourceLocation NameLoc;
3769 if (Tok.is(tok::identifier)) {
3770 Name = Tok.getIdentifierInfo();
3771 NameLoc = ConsumeToken();
3774 if (!Name && ScopedEnumKWLoc.isValid()) {
3775 // C++0x 7.2p2: The optional identifier shall not be omitted in the
3776 // declaration of a scoped enumeration.
3777 Diag(Tok, diag::err_scoped_enum_missing_identifier);
3778 ScopedEnumKWLoc = SourceLocation();
3779 IsScopedUsingClassTag = false;
3782 // Okay, end the suppression area. We'll decide whether to emit the
3783 // diagnostics in a second.
3784 if (shouldDelayDiagsInTag)
3785 diagsFromTag.done();
3787 TypeResult BaseType;
3789 // Parse the fixed underlying type.
3790 bool CanBeBitfield = getCurScope()->getFlags() & Scope::ClassScope;
3791 if (AllowFixedUnderlyingType && Tok.is(tok::colon)) {
3792 bool PossibleBitfield = false;
3793 if (CanBeBitfield) {
3794 // If we're in class scope, this can either be an enum declaration with
3795 // an underlying type, or a declaration of a bitfield member. We try to
3796 // use a simple disambiguation scheme first to catch the common cases
3797 // (integer literal, sizeof); if it's still ambiguous, we then consider
3798 // anything that's a simple-type-specifier followed by '(' as an
3799 // expression. This suffices because function types are not valid
3800 // underlying types anyway.
3801 EnterExpressionEvaluationContext Unevaluated(Actions,
3802 Sema::ConstantEvaluated);
3803 TPResult TPR = isExpressionOrTypeSpecifierSimple(NextToken().getKind());
3804 // If the next token starts an expression, we know we're parsing a
3805 // bit-field. This is the common case.
3806 if (TPR == TPResult::True)
3807 PossibleBitfield = true;
3808 // If the next token starts a type-specifier-seq, it may be either a
3809 // a fixed underlying type or the start of a function-style cast in C++;
3810 // lookahead one more token to see if it's obvious that we have a
3811 // fixed underlying type.
3812 else if (TPR == TPResult::False &&
3813 GetLookAheadToken(2).getKind() == tok::semi) {
3817 // We have the start of a type-specifier-seq, so we have to perform
3818 // tentative parsing to determine whether we have an expression or a
3820 TentativeParsingAction TPA(*this);
3825 // If we see a type specifier followed by an open-brace, we have an
3826 // ambiguity between an underlying type and a C++11 braced
3827 // function-style cast. Resolve this by always treating it as an
3829 // FIXME: The standard is not entirely clear on how to disambiguate in
3831 if ((getLangOpts().CPlusPlus &&
3832 isCXXDeclarationSpecifier(TPResult::True) != TPResult::True) ||
3833 (!getLangOpts().CPlusPlus && !isDeclarationSpecifier(true))) {
3834 // We'll parse this as a bitfield later.
3835 PossibleBitfield = true;
3838 // We have a type-specifier-seq.
3847 if (!PossibleBitfield) {
3849 BaseType = ParseTypeName(&Range);
3851 if (getLangOpts().CPlusPlus11) {
3852 Diag(StartLoc, diag::warn_cxx98_compat_enum_fixed_underlying_type);
3853 } else if (!getLangOpts().ObjC2) {
3854 if (getLangOpts().CPlusPlus)
3855 Diag(StartLoc, diag::ext_cxx11_enum_fixed_underlying_type) << Range;
3857 Diag(StartLoc, diag::ext_c_enum_fixed_underlying_type) << Range;
3862 // There are four options here. If we have 'friend enum foo;' then this is a
3863 // friend declaration, and cannot have an accompanying definition. If we have
3864 // 'enum foo;', then this is a forward declaration. If we have
3865 // 'enum foo {...' then this is a definition. Otherwise we have something
3866 // like 'enum foo xyz', a reference.
3868 // This is needed to handle stuff like this right (C99 6.7.2.3p11):
3869 // enum foo {..}; void bar() { enum foo; } <- new foo in bar.
3870 // enum foo {..}; void bar() { enum foo x; } <- use of old foo.
3872 Sema::TagUseKind TUK;
3873 if (!AllowDeclaration) {
3874 TUK = Sema::TUK_Reference;
3875 } else if (Tok.is(tok::l_brace)) {
3876 if (DS.isFriendSpecified()) {
3877 Diag(Tok.getLocation(), diag::err_friend_decl_defines_type)
3878 << SourceRange(DS.getFriendSpecLoc());
3880 SkipUntil(tok::r_brace, StopAtSemi);
3881 TUK = Sema::TUK_Friend;
3883 TUK = Sema::TUK_Definition;
3885 } else if (!isTypeSpecifier(DSC) &&
3886 (Tok.is(tok::semi) ||
3887 (Tok.isAtStartOfLine() &&
3888 !isValidAfterTypeSpecifier(CanBeBitfield)))) {
3889 TUK = DS.isFriendSpecified() ? Sema::TUK_Friend : Sema::TUK_Declaration;
3890 if (Tok.isNot(tok::semi)) {
3891 // A semicolon was missing after this declaration. Diagnose and recover.
3892 ExpectAndConsume(tok::semi, diag::err_expected_after, "enum");
3894 Tok.setKind(tok::semi);
3897 TUK = Sema::TUK_Reference;
3900 // If this is an elaborated type specifier, and we delayed
3901 // diagnostics before, just merge them into the current pool.
3902 if (TUK == Sema::TUK_Reference && shouldDelayDiagsInTag) {
3903 diagsFromTag.redelay();
3906 MultiTemplateParamsArg TParams;
3907 if (TemplateInfo.Kind != ParsedTemplateInfo::NonTemplate &&
3908 TUK != Sema::TUK_Reference) {
3909 if (!getLangOpts().CPlusPlus11 || !SS.isSet()) {
3910 // Skip the rest of this declarator, up until the comma or semicolon.
3911 Diag(Tok, diag::err_enum_template);
3912 SkipUntil(tok::comma, StopAtSemi);
3916 if (TemplateInfo.Kind == ParsedTemplateInfo::ExplicitInstantiation) {
3917 // Enumerations can't be explicitly instantiated.
3918 DS.SetTypeSpecError();
3919 Diag(StartLoc, diag::err_explicit_instantiation_enum);
3923 assert(TemplateInfo.TemplateParams && "no template parameters");
3924 TParams = MultiTemplateParamsArg(TemplateInfo.TemplateParams->data(),
3925 TemplateInfo.TemplateParams->size());
3928 if (TUK == Sema::TUK_Reference)
3929 ProhibitAttributes(attrs);
3931 if (!Name && TUK != Sema::TUK_Definition) {
3932 Diag(Tok, diag::err_enumerator_unnamed_no_def);
3934 // Skip the rest of this declarator, up until the comma or semicolon.
3935 SkipUntil(tok::comma, StopAtSemi);
3939 handleDeclspecAlignBeforeClassKey(attrs, DS, TUK);
3941 Sema::SkipBodyInfo SkipBody;
3942 if (!Name && TUK == Sema::TUK_Definition && Tok.is(tok::l_brace) &&
3943 NextToken().is(tok::identifier))
3944 SkipBody = Actions.shouldSkipAnonEnumBody(getCurScope(),
3945 NextToken().getIdentifierInfo(),
3946 NextToken().getLocation());
3949 bool IsDependent = false;
3950 const char *PrevSpec = nullptr;
3952 Decl *TagDecl = Actions.ActOnTag(getCurScope(), DeclSpec::TST_enum, TUK,
3953 StartLoc, SS, Name, NameLoc, attrs.getList(),
3954 AS, DS.getModulePrivateSpecLoc(), TParams,
3955 Owned, IsDependent, ScopedEnumKWLoc,
3956 IsScopedUsingClassTag, BaseType,
3957 DSC == DSC_type_specifier, &SkipBody);
3959 if (SkipBody.ShouldSkip) {
3960 assert(TUK == Sema::TUK_Definition && "can only skip a definition");
3962 BalancedDelimiterTracker T(*this, tok::l_brace);
3966 if (DS.SetTypeSpecType(DeclSpec::TST_enum, StartLoc,
3967 NameLoc.isValid() ? NameLoc : StartLoc,
3968 PrevSpec, DiagID, TagDecl, Owned,
3969 Actions.getASTContext().getPrintingPolicy()))
3970 Diag(StartLoc, DiagID) << PrevSpec;
3975 // This enum has a dependent nested-name-specifier. Handle it as a
3978 DS.SetTypeSpecError();
3979 Diag(Tok, diag::err_expected_type_name_after_typename);
3983 TypeResult Type = Actions.ActOnDependentTag(
3984 getCurScope(), DeclSpec::TST_enum, TUK, SS, Name, StartLoc, NameLoc);
3985 if (Type.isInvalid()) {
3986 DS.SetTypeSpecError();
3990 if (DS.SetTypeSpecType(DeclSpec::TST_typename, StartLoc,
3991 NameLoc.isValid() ? NameLoc : StartLoc,
3992 PrevSpec, DiagID, Type.get(),
3993 Actions.getASTContext().getPrintingPolicy()))
3994 Diag(StartLoc, DiagID) << PrevSpec;
4000 // The action failed to produce an enumeration tag. If this is a
4001 // definition, consume the entire definition.
4002 if (Tok.is(tok::l_brace) && TUK != Sema::TUK_Reference) {
4004 SkipUntil(tok::r_brace, StopAtSemi);
4007 DS.SetTypeSpecError();
4011 if (Tok.is(tok::l_brace) && TUK != Sema::TUK_Reference)
4012 ParseEnumBody(StartLoc, TagDecl);
4014 if (DS.SetTypeSpecType(DeclSpec::TST_enum, StartLoc,
4015 NameLoc.isValid() ? NameLoc : StartLoc,
4016 PrevSpec, DiagID, TagDecl, Owned,
4017 Actions.getASTContext().getPrintingPolicy()))
4018 Diag(StartLoc, DiagID) << PrevSpec;
4021 /// ParseEnumBody - Parse a {} enclosed enumerator-list.
4022 /// enumerator-list:
4024 /// enumerator-list ',' enumerator
4026 /// enumeration-constant attributes[opt]
4027 /// enumeration-constant attributes[opt] '=' constant-expression
4028 /// enumeration-constant:
4031 void Parser::ParseEnumBody(SourceLocation StartLoc, Decl *EnumDecl) {
4032 // Enter the scope of the enum body and start the definition.
4033 ParseScope EnumScope(this, Scope::DeclScope | Scope::EnumScope);
4034 Actions.ActOnTagStartDefinition(getCurScope(), EnumDecl);
4036 BalancedDelimiterTracker T(*this, tok::l_brace);
4039 // C does not allow an empty enumerator-list, C++ does [dcl.enum].
4040 if (Tok.is(tok::r_brace) && !getLangOpts().CPlusPlus)
4041 Diag(Tok, diag::error_empty_enum);
4043 SmallVector<Decl *, 32> EnumConstantDecls;
4044 SmallVector<SuppressAccessChecks, 32> EnumAvailabilityDiags;
4046 Decl *LastEnumConstDecl = nullptr;
4048 // Parse the enumerator-list.
4049 while (Tok.isNot(tok::r_brace)) {
4050 // Parse enumerator. If failed, try skipping till the start of the next
4051 // enumerator definition.
4052 if (Tok.isNot(tok::identifier)) {
4053 Diag(Tok.getLocation(), diag::err_expected) << tok::identifier;
4054 if (SkipUntil(tok::comma, tok::r_brace, StopBeforeMatch) &&
4055 TryConsumeToken(tok::comma))
4059 IdentifierInfo *Ident = Tok.getIdentifierInfo();
4060 SourceLocation IdentLoc = ConsumeToken();
4062 // If attributes exist after the enumerator, parse them.
4063 ParsedAttributesWithRange attrs(AttrFactory);
4064 MaybeParseGNUAttributes(attrs);
4065 ProhibitAttributes(attrs); // GNU-style attributes are prohibited.
4066 if (getLangOpts().CPlusPlus11 && isCXX11AttributeSpecifier()) {
4067 if (!getLangOpts().CPlusPlus1z)
4068 Diag(Tok.getLocation(), diag::warn_cxx14_compat_attribute)
4069 << 1 /*enumerator*/;
4070 ParseCXX11Attributes(attrs);
4073 SourceLocation EqualLoc;
4074 ExprResult AssignedVal;
4075 EnumAvailabilityDiags.emplace_back(*this);
4077 if (TryConsumeToken(tok::equal, EqualLoc)) {
4078 AssignedVal = ParseConstantExpression();
4079 if (AssignedVal.isInvalid())
4080 SkipUntil(tok::comma, tok::r_brace, StopBeforeMatch);
4083 // Install the enumerator constant into EnumDecl.
4084 Decl *EnumConstDecl = Actions.ActOnEnumConstant(getCurScope(), EnumDecl,
4087 attrs.getList(), EqualLoc,
4089 EnumAvailabilityDiags.back().done();
4091 EnumConstantDecls.push_back(EnumConstDecl);
4092 LastEnumConstDecl = EnumConstDecl;
4094 if (Tok.is(tok::identifier)) {
4095 // We're missing a comma between enumerators.
4096 SourceLocation Loc = PP.getLocForEndOfToken(PrevTokLocation);
4097 Diag(Loc, diag::err_enumerator_list_missing_comma)
4098 << FixItHint::CreateInsertion(Loc, ", ");
4102 // Emumerator definition must be finished, only comma or r_brace are
4104 SourceLocation CommaLoc;
4105 if (Tok.isNot(tok::r_brace) && !TryConsumeToken(tok::comma, CommaLoc)) {
4106 if (EqualLoc.isValid())
4107 Diag(Tok.getLocation(), diag::err_expected_either) << tok::r_brace
4110 Diag(Tok.getLocation(), diag::err_expected_end_of_enumerator);
4111 if (SkipUntil(tok::comma, tok::r_brace, StopBeforeMatch)) {
4112 if (TryConsumeToken(tok::comma, CommaLoc))
4119 // If comma is followed by r_brace, emit appropriate warning.
4120 if (Tok.is(tok::r_brace) && CommaLoc.isValid()) {
4121 if (!getLangOpts().C99 && !getLangOpts().CPlusPlus11)
4122 Diag(CommaLoc, getLangOpts().CPlusPlus ?
4123 diag::ext_enumerator_list_comma_cxx :
4124 diag::ext_enumerator_list_comma_c)
4125 << FixItHint::CreateRemoval(CommaLoc);
4126 else if (getLangOpts().CPlusPlus11)
4127 Diag(CommaLoc, diag::warn_cxx98_compat_enumerator_list_comma)
4128 << FixItHint::CreateRemoval(CommaLoc);
4136 // If attributes exist after the identifier list, parse them.
4137 ParsedAttributes attrs(AttrFactory);
4138 MaybeParseGNUAttributes(attrs);
4140 Actions.ActOnEnumBody(StartLoc, T.getOpenLocation(), T.getCloseLocation(),
4141 EnumDecl, EnumConstantDecls,
4145 // Now handle enum constant availability diagnostics.
4146 assert(EnumConstantDecls.size() == EnumAvailabilityDiags.size());
4147 for (size_t i = 0, e = EnumConstantDecls.size(); i != e; ++i) {
4148 ParsingDeclRAIIObject PD(*this, ParsingDeclRAIIObject::NoParent);
4149 EnumAvailabilityDiags[i].redelay();
4150 PD.complete(EnumConstantDecls[i]);
4154 Actions.ActOnTagFinishDefinition(getCurScope(), EnumDecl,
4155 T.getCloseLocation());
4157 // The next token must be valid after an enum definition. If not, a ';'
4158 // was probably forgotten.
4159 bool CanBeBitfield = getCurScope()->getFlags() & Scope::ClassScope;
4160 if (!isValidAfterTypeSpecifier(CanBeBitfield)) {
4161 ExpectAndConsume(tok::semi, diag::err_expected_after, "enum");
4162 // Push this token back into the preprocessor and change our current token
4163 // to ';' so that the rest of the code recovers as though there were an
4164 // ';' after the definition.
4166 Tok.setKind(tok::semi);
4170 /// isTypeSpecifierQualifier - Return true if the current token could be the
4171 /// start of a type-qualifier-list.
4172 bool Parser::isTypeQualifier() const {
4173 switch (Tok.getKind()) {
4174 default: return false;
4177 case tok::kw_volatile:
4178 case tok::kw_restrict:
4179 case tok::kw___private:
4180 case tok::kw___local:
4181 case tok::kw___global:
4182 case tok::kw___constant:
4183 case tok::kw___generic:
4184 case tok::kw___read_only:
4185 case tok::kw___read_write:
4186 case tok::kw___write_only:
4191 /// isKnownToBeTypeSpecifier - Return true if we know that the specified token
4192 /// is definitely a type-specifier. Return false if it isn't part of a type
4193 /// specifier or if we're not sure.
4194 bool Parser::isKnownToBeTypeSpecifier(const Token &Tok) const {
4195 switch (Tok.getKind()) {
4196 default: return false;
4200 case tok::kw___int64:
4201 case tok::kw___int128:
4202 case tok::kw_signed:
4203 case tok::kw_unsigned:
4204 case tok::kw__Complex:
4205 case tok::kw__Imaginary:
4208 case tok::kw_wchar_t:
4209 case tok::kw_char16_t:
4210 case tok::kw_char32_t:
4214 case tok::kw_double:
4217 case tok::kw__Decimal32:
4218 case tok::kw__Decimal64:
4219 case tok::kw__Decimal128:
4220 case tok::kw___vector:
4222 // struct-or-union-specifier (C99) or class-specifier (C++)
4224 case tok::kw_struct:
4225 case tok::kw___interface:
4231 case tok::annot_typename:
4236 /// isTypeSpecifierQualifier - Return true if the current token could be the
4237 /// start of a specifier-qualifier-list.
4238 bool Parser::isTypeSpecifierQualifier() {
4239 switch (Tok.getKind()) {
4240 default: return false;
4242 case tok::identifier: // foo::bar
4243 if (TryAltiVecVectorToken())
4246 case tok::kw_typename: // typename T::type
4247 // Annotate typenames and C++ scope specifiers. If we get one, just
4248 // recurse to handle whatever we get.
4249 if (TryAnnotateTypeOrScopeToken())
4251 if (Tok.is(tok::identifier))
4253 return isTypeSpecifierQualifier();
4255 case tok::coloncolon: // ::foo::bar
4256 if (NextToken().is(tok::kw_new) || // ::new
4257 NextToken().is(tok::kw_delete)) // ::delete
4260 if (TryAnnotateTypeOrScopeToken())
4262 return isTypeSpecifierQualifier();
4264 // GNU attributes support.
4265 case tok::kw___attribute:
4266 // GNU typeof support.
4267 case tok::kw_typeof:
4272 case tok::kw___int64:
4273 case tok::kw___int128:
4274 case tok::kw_signed:
4275 case tok::kw_unsigned:
4276 case tok::kw__Complex:
4277 case tok::kw__Imaginary:
4280 case tok::kw_wchar_t:
4281 case tok::kw_char16_t:
4282 case tok::kw_char32_t:
4286 case tok::kw_double:
4289 case tok::kw__Decimal32:
4290 case tok::kw__Decimal64:
4291 case tok::kw__Decimal128:
4292 case tok::kw___vector:
4294 // struct-or-union-specifier (C99) or class-specifier (C++)
4296 case tok::kw_struct:
4297 case tok::kw___interface:
4304 case tok::kw_volatile:
4305 case tok::kw_restrict:
4307 // Debugger support.
4308 case tok::kw___unknown_anytype:
4311 case tok::annot_typename:
4314 // GNU ObjC bizarre protocol extension: <proto1,proto2> with implicit 'id'.
4316 return getLangOpts().ObjC1;
4318 case tok::kw___cdecl:
4319 case tok::kw___stdcall:
4320 case tok::kw___fastcall:
4321 case tok::kw___thiscall:
4322 case tok::kw___vectorcall:
4324 case tok::kw___ptr64:
4325 case tok::kw___ptr32:
4326 case tok::kw___pascal:
4327 case tok::kw___unaligned:
4329 case tok::kw___nonnull:
4330 case tok::kw___nullable:
4331 case tok::kw___null_unspecified:
4333 case tok::kw___private:
4334 case tok::kw___local:
4335 case tok::kw___global:
4336 case tok::kw___constant:
4337 case tok::kw___generic:
4338 case tok::kw___read_only:
4339 case tok::kw___read_write:
4340 case tok::kw___write_only:
4345 case tok::kw__Atomic:
4350 /// isDeclarationSpecifier() - Return true if the current token is part of a
4351 /// declaration specifier.
4353 /// \param DisambiguatingWithExpression True to indicate that the purpose of
4354 /// this check is to disambiguate between an expression and a declaration.
4355 bool Parser::isDeclarationSpecifier(bool DisambiguatingWithExpression) {
4356 switch (Tok.getKind()) {
4357 default: return false;
4359 case tok::identifier: // foo::bar
4360 // Unfortunate hack to support "Class.factoryMethod" notation.
4361 if (getLangOpts().ObjC1 && NextToken().is(tok::period))
4363 if (TryAltiVecVectorToken())
4366 case tok::kw_decltype: // decltype(T())::type
4367 case tok::kw_typename: // typename T::type
4368 // Annotate typenames and C++ scope specifiers. If we get one, just
4369 // recurse to handle whatever we get.
4370 if (TryAnnotateTypeOrScopeToken())
4372 if (Tok.is(tok::identifier))
4375 // If we're in Objective-C and we have an Objective-C class type followed
4376 // by an identifier and then either ':' or ']', in a place where an
4377 // expression is permitted, then this is probably a class message send
4378 // missing the initial '['. In this case, we won't consider this to be
4379 // the start of a declaration.
4380 if (DisambiguatingWithExpression &&
4381 isStartOfObjCClassMessageMissingOpenBracket())
4384 return isDeclarationSpecifier();
4386 case tok::coloncolon: // ::foo::bar
4387 if (NextToken().is(tok::kw_new) || // ::new
4388 NextToken().is(tok::kw_delete)) // ::delete
4391 // Annotate typenames and C++ scope specifiers. If we get one, just
4392 // recurse to handle whatever we get.
4393 if (TryAnnotateTypeOrScopeToken())
4395 return isDeclarationSpecifier();
4397 // storage-class-specifier
4398 case tok::kw_typedef:
4399 case tok::kw_extern:
4400 case tok::kw___private_extern__:
4401 case tok::kw_static:
4403 case tok::kw_register:
4404 case tok::kw___thread:
4405 case tok::kw_thread_local:
4406 case tok::kw__Thread_local:
4409 case tok::kw___module_private__:
4412 case tok::kw___unknown_anytype:
4417 case tok::kw___int64:
4418 case tok::kw___int128:
4419 case tok::kw_signed:
4420 case tok::kw_unsigned:
4421 case tok::kw__Complex:
4422 case tok::kw__Imaginary:
4425 case tok::kw_wchar_t:
4426 case tok::kw_char16_t:
4427 case tok::kw_char32_t:
4432 case tok::kw_double:
4435 case tok::kw__Decimal32:
4436 case tok::kw__Decimal64:
4437 case tok::kw__Decimal128:
4438 case tok::kw___vector:
4440 // struct-or-union-specifier (C99) or class-specifier (C++)
4442 case tok::kw_struct:
4444 case tok::kw___interface:
4450 case tok::kw_volatile:
4451 case tok::kw_restrict:
4453 // function-specifier
4454 case tok::kw_inline:
4455 case tok::kw_virtual:
4456 case tok::kw_explicit:
4457 case tok::kw__Noreturn:
4459 // alignment-specifier
4460 case tok::kw__Alignas:
4463 case tok::kw_friend:
4465 // static_assert-declaration
4466 case tok::kw__Static_assert:
4468 // GNU typeof support.
4469 case tok::kw_typeof:
4472 case tok::kw___attribute:
4474 // C++11 decltype and constexpr.
4475 case tok::annot_decltype:
4476 case tok::kw_constexpr:
4479 case tok::kw__Atomic:
4482 // GNU ObjC bizarre protocol extension: <proto1,proto2> with implicit 'id'.
4484 return getLangOpts().ObjC1;
4487 case tok::annot_typename:
4488 return !DisambiguatingWithExpression ||
4489 !isStartOfObjCClassMessageMissingOpenBracket();
4491 case tok::kw___declspec:
4492 case tok::kw___cdecl:
4493 case tok::kw___stdcall:
4494 case tok::kw___fastcall:
4495 case tok::kw___thiscall:
4496 case tok::kw___vectorcall:
4498 case tok::kw___sptr:
4499 case tok::kw___uptr:
4500 case tok::kw___ptr64:
4501 case tok::kw___ptr32:
4502 case tok::kw___forceinline:
4503 case tok::kw___pascal:
4504 case tok::kw___unaligned:
4506 case tok::kw___nonnull:
4507 case tok::kw___nullable:
4508 case tok::kw___null_unspecified:
4510 case tok::kw___private:
4511 case tok::kw___local:
4512 case tok::kw___global:
4513 case tok::kw___constant:
4514 case tok::kw___generic:
4515 case tok::kw___read_only:
4516 case tok::kw___read_write:
4517 case tok::kw___write_only:
4523 bool Parser::isConstructorDeclarator(bool IsUnqualified) {
4524 TentativeParsingAction TPA(*this);
4526 // Parse the C++ scope specifier.
4528 if (ParseOptionalCXXScopeSpecifier(SS, ParsedType(),
4529 /*EnteringContext=*/true)) {
4534 // Parse the constructor name.
4535 if (Tok.isOneOf(tok::identifier, tok::annot_template_id)) {
4536 // We already know that we have a constructor name; just consume
4544 // Current class name must be followed by a left parenthesis.
4545 if (Tok.isNot(tok::l_paren)) {
4551 // A right parenthesis, or ellipsis followed by a right parenthesis signals
4552 // that we have a constructor.
4553 if (Tok.is(tok::r_paren) ||
4554 (Tok.is(tok::ellipsis) && NextToken().is(tok::r_paren))) {
4559 // A C++11 attribute here signals that we have a constructor, and is an
4560 // attribute on the first constructor parameter.
4561 if (getLangOpts().CPlusPlus11 &&
4562 isCXX11AttributeSpecifier(/*Disambiguate*/ false,
4563 /*OuterMightBeMessageSend*/ true)) {
4568 // If we need to, enter the specified scope.
4569 DeclaratorScopeObj DeclScopeObj(*this, SS);
4570 if (SS.isSet() && Actions.ShouldEnterDeclaratorScope(getCurScope(), SS))
4571 DeclScopeObj.EnterDeclaratorScope();
4573 // Optionally skip Microsoft attributes.
4574 ParsedAttributes Attrs(AttrFactory);
4575 MaybeParseMicrosoftAttributes(Attrs);
4577 // Check whether the next token(s) are part of a declaration
4578 // specifier, in which case we have the start of a parameter and,
4579 // therefore, we know that this is a constructor.
4580 bool IsConstructor = false;
4581 if (isDeclarationSpecifier())
4582 IsConstructor = true;
4583 else if (Tok.is(tok::identifier) ||
4584 (Tok.is(tok::annot_cxxscope) && NextToken().is(tok::identifier))) {
4585 // We've seen "C ( X" or "C ( X::Y", but "X" / "X::Y" is not a type.
4586 // This might be a parenthesized member name, but is more likely to
4587 // be a constructor declaration with an invalid argument type. Keep
4589 if (Tok.is(tok::annot_cxxscope))
4593 // If this is not a constructor, we must be parsing a declarator,
4594 // which must have one of the following syntactic forms (see the
4595 // grammar extract at the start of ParseDirectDeclarator):
4596 switch (Tok.getKind()) {
4601 // C(X [ [attribute]]);
4602 case tok::coloncolon:
4605 // Assume this isn't a constructor, rather than assuming it's a
4606 // constructor with an unnamed parameter of an ill-formed type.
4611 if (NextToken().is(tok::colon) || NextToken().is(tok::kw_try)) {
4612 // Assume these were meant to be constructors:
4613 // C(X) : (the name of a bit-field cannot be parenthesized).
4614 // C(X) try (this is otherwise ill-formed).
4615 IsConstructor = true;
4617 if (NextToken().is(tok::semi) || NextToken().is(tok::l_brace)) {
4618 // If we have a constructor name within the class definition,
4619 // assume these were meant to be constructors:
4622 // ... because otherwise we would be declaring a non-static data
4623 // member that is ill-formed because it's of the same type as its
4624 // surrounding class.
4626 // FIXME: We can actually do this whether or not the name is qualified,
4627 // because if it is qualified in this context it must be being used as
4628 // a constructor name. However, we do not implement that rule correctly
4629 // currently, so we're somewhat conservative here.
4630 IsConstructor = IsUnqualified;
4635 IsConstructor = true;
4641 return IsConstructor;
4644 /// ParseTypeQualifierListOpt
4645 /// type-qualifier-list: [C99 6.7.5]
4647 /// [vendor] attributes
4648 /// [ only if AttrReqs & AR_VendorAttributesParsed ]
4649 /// type-qualifier-list type-qualifier
4650 /// [vendor] type-qualifier-list attributes
4651 /// [ only if AttrReqs & AR_VendorAttributesParsed ]
4652 /// [C++0x] attribute-specifier[opt] is allowed before cv-qualifier-seq
4653 /// [ only if AttReqs & AR_CXX11AttributesParsed ]
4654 /// Note: vendor can be GNU, MS, etc and can be explicitly controlled via
4655 /// AttrRequirements bitmask values.
4656 void Parser::ParseTypeQualifierListOpt(DeclSpec &DS, unsigned AttrReqs,
4658 bool IdentifierRequired) {
4659 if (getLangOpts().CPlusPlus11 && (AttrReqs & AR_CXX11AttributesParsed) &&
4660 isCXX11AttributeSpecifier()) {
4661 ParsedAttributesWithRange attrs(AttrFactory);
4662 ParseCXX11Attributes(attrs);
4663 DS.takeAttributesFrom(attrs);
4666 SourceLocation EndLoc;
4669 bool isInvalid = false;
4670 const char *PrevSpec = nullptr;
4671 unsigned DiagID = 0;
4672 SourceLocation Loc = Tok.getLocation();
4674 switch (Tok.getKind()) {
4675 case tok::code_completion:
4676 Actions.CodeCompleteTypeQualifiers(DS);
4677 return cutOffParsing();
4680 isInvalid = DS.SetTypeQual(DeclSpec::TQ_const , Loc, PrevSpec, DiagID,
4683 case tok::kw_volatile:
4684 isInvalid = DS.SetTypeQual(DeclSpec::TQ_volatile, Loc, PrevSpec, DiagID,
4687 case tok::kw_restrict:
4688 isInvalid = DS.SetTypeQual(DeclSpec::TQ_restrict, Loc, PrevSpec, DiagID,
4691 case tok::kw__Atomic:
4693 goto DoneWithTypeQuals;
4694 isInvalid = DS.SetTypeQual(DeclSpec::TQ_atomic, Loc, PrevSpec, DiagID,
4698 // OpenCL qualifiers:
4699 case tok::kw___private:
4700 case tok::kw___global:
4701 case tok::kw___local:
4702 case tok::kw___constant:
4703 case tok::kw___generic:
4704 case tok::kw___read_only:
4705 case tok::kw___write_only:
4706 case tok::kw___read_write:
4707 ParseOpenCLQualifiers(DS.getAttributes());
4710 case tok::kw___uptr:
4711 // GNU libc headers in C mode use '__uptr' as an identifer which conflicts
4712 // with the MS modifier keyword.
4713 if ((AttrReqs & AR_DeclspecAttributesParsed) && !getLangOpts().CPlusPlus &&
4714 IdentifierRequired && DS.isEmpty() && NextToken().is(tok::semi)) {
4715 if (TryKeywordIdentFallback(false))
4718 case tok::kw___sptr:
4720 case tok::kw___ptr64:
4721 case tok::kw___ptr32:
4722 case tok::kw___cdecl:
4723 case tok::kw___stdcall:
4724 case tok::kw___fastcall:
4725 case tok::kw___thiscall:
4726 case tok::kw___vectorcall:
4727 case tok::kw___unaligned:
4728 if (AttrReqs & AR_DeclspecAttributesParsed) {
4729 ParseMicrosoftTypeAttributes(DS.getAttributes());
4732 goto DoneWithTypeQuals;
4733 case tok::kw___pascal:
4734 if (AttrReqs & AR_VendorAttributesParsed) {
4735 ParseBorlandTypeAttributes(DS.getAttributes());
4738 goto DoneWithTypeQuals;
4740 // Nullability type specifiers.
4741 case tok::kw___nonnull:
4742 case tok::kw___nullable:
4743 case tok::kw___null_unspecified:
4744 ParseNullabilityTypeSpecifiers(DS.getAttributes());
4747 case tok::kw___attribute:
4748 if (AttrReqs & AR_GNUAttributesParsedAndRejected)
4749 // When GNU attributes are expressly forbidden, diagnose their usage.
4750 Diag(Tok, diag::err_attributes_not_allowed);
4752 // Parse the attributes even if they are rejected to ensure that error
4753 // recovery is graceful.
4754 if (AttrReqs & AR_GNUAttributesParsed ||
4755 AttrReqs & AR_GNUAttributesParsedAndRejected) {
4756 ParseGNUAttributes(DS.getAttributes());
4757 continue; // do *not* consume the next token!
4759 // otherwise, FALL THROUGH!
4762 // If this is not a type-qualifier token, we're done reading type
4763 // qualifiers. First verify that DeclSpec's are consistent.
4764 DS.Finish(Diags, PP, Actions.getASTContext().getPrintingPolicy());
4765 if (EndLoc.isValid())
4766 DS.SetRangeEnd(EndLoc);
4770 // If the specifier combination wasn't legal, issue a diagnostic.
4772 assert(PrevSpec && "Method did not return previous specifier!");
4773 Diag(Tok, DiagID) << PrevSpec;
4775 EndLoc = ConsumeToken();
4780 /// ParseDeclarator - Parse and verify a newly-initialized declarator.
4782 void Parser::ParseDeclarator(Declarator &D) {
4783 /// This implements the 'declarator' production in the C grammar, then checks
4784 /// for well-formedness and issues diagnostics.
4785 ParseDeclaratorInternal(D, &Parser::ParseDirectDeclarator);
4788 static bool isPtrOperatorToken(tok::TokenKind Kind, const LangOptions &Lang,
4789 unsigned TheContext) {
4790 if (Kind == tok::star || Kind == tok::caret)
4793 if (!Lang.CPlusPlus)
4796 if (Kind == tok::amp)
4799 // We parse rvalue refs in C++03, because otherwise the errors are scary.
4800 // But we must not parse them in conversion-type-ids and new-type-ids, since
4801 // those can be legitimately followed by a && operator.
4802 // (The same thing can in theory happen after a trailing-return-type, but
4803 // since those are a C++11 feature, there is no rejects-valid issue there.)
4804 if (Kind == tok::ampamp)
4805 return Lang.CPlusPlus11 || (TheContext != Declarator::ConversionIdContext &&
4806 TheContext != Declarator::CXXNewContext);
4811 /// ParseDeclaratorInternal - Parse a C or C++ declarator. The direct-declarator
4812 /// is parsed by the function passed to it. Pass null, and the direct-declarator
4813 /// isn't parsed at all, making this function effectively parse the C++
4814 /// ptr-operator production.
4816 /// If the grammar of this construct is extended, matching changes must also be
4817 /// made to TryParseDeclarator and MightBeDeclarator, and possibly to
4818 /// isConstructorDeclarator.
4820 /// declarator: [C99 6.7.5] [C++ 8p4, dcl.decl]
4821 /// [C] pointer[opt] direct-declarator
4822 /// [C++] direct-declarator
4823 /// [C++] ptr-operator declarator
4825 /// pointer: [C99 6.7.5]
4826 /// '*' type-qualifier-list[opt]
4827 /// '*' type-qualifier-list[opt] pointer
4830 /// '*' cv-qualifier-seq[opt]
4833 /// [GNU] '&' restrict[opt] attributes[opt]
4834 /// [GNU?] '&&' restrict[opt] attributes[opt]
4835 /// '::'[opt] nested-name-specifier '*' cv-qualifier-seq[opt]
4836 void Parser::ParseDeclaratorInternal(Declarator &D,
4837 DirectDeclParseFunction DirectDeclParser) {
4838 if (Diags.hasAllExtensionsSilenced())
4841 // C++ member pointers start with a '::' or a nested-name.
4842 // Member pointers get special handling, since there's no place for the
4843 // scope spec in the generic path below.
4844 if (getLangOpts().CPlusPlus &&
4845 (Tok.is(tok::coloncolon) ||
4846 (Tok.is(tok::identifier) &&
4847 (NextToken().is(tok::coloncolon) || NextToken().is(tok::less))) ||
4848 Tok.is(tok::annot_cxxscope))) {
4849 bool EnteringContext = D.getContext() == Declarator::FileContext ||
4850 D.getContext() == Declarator::MemberContext;
4852 ParseOptionalCXXScopeSpecifier(SS, ParsedType(), EnteringContext);
4854 if (SS.isNotEmpty()) {
4855 if (Tok.isNot(tok::star)) {
4856 // The scope spec really belongs to the direct-declarator.
4857 if (D.mayHaveIdentifier())
4858 D.getCXXScopeSpec() = SS;
4860 AnnotateScopeToken(SS, true);
4862 if (DirectDeclParser)
4863 (this->*DirectDeclParser)(D);
4867 SourceLocation Loc = ConsumeToken();
4869 DeclSpec DS(AttrFactory);
4870 ParseTypeQualifierListOpt(DS);
4871 D.ExtendWithDeclSpec(DS);
4873 // Recurse to parse whatever is left.
4874 ParseDeclaratorInternal(D, DirectDeclParser);
4876 // Sema will have to catch (syntactically invalid) pointers into global
4877 // scope. It has to catch pointers into namespace scope anyway.
4878 D.AddTypeInfo(DeclaratorChunk::getMemberPointer(SS,DS.getTypeQualifiers(),
4881 /* Don't replace range end. */SourceLocation());
4886 tok::TokenKind Kind = Tok.getKind();
4887 // Not a pointer, C++ reference, or block.
4888 if (!isPtrOperatorToken(Kind, getLangOpts(), D.getContext())) {
4889 if (DirectDeclParser)
4890 (this->*DirectDeclParser)(D);
4894 // Otherwise, '*' -> pointer, '^' -> block, '&' -> lvalue reference,
4895 // '&&' -> rvalue reference
4896 SourceLocation Loc = ConsumeToken(); // Eat the *, ^, & or &&.
4899 if (Kind == tok::star || Kind == tok::caret) {
4901 DeclSpec DS(AttrFactory);
4903 // GNU attributes are not allowed here in a new-type-id, but Declspec and
4904 // C++11 attributes are allowed.
4905 unsigned Reqs = AR_CXX11AttributesParsed | AR_DeclspecAttributesParsed |
4906 ((D.getContext() != Declarator::CXXNewContext)
4907 ? AR_GNUAttributesParsed
4908 : AR_GNUAttributesParsedAndRejected);
4909 ParseTypeQualifierListOpt(DS, Reqs, true, !D.mayOmitIdentifier());
4910 D.ExtendWithDeclSpec(DS);
4912 // Recursively parse the declarator.
4913 ParseDeclaratorInternal(D, DirectDeclParser);
4914 if (Kind == tok::star)
4915 // Remember that we parsed a pointer type, and remember the type-quals.
4916 D.AddTypeInfo(DeclaratorChunk::getPointer(DS.getTypeQualifiers(), Loc,
4917 DS.getConstSpecLoc(),
4918 DS.getVolatileSpecLoc(),
4919 DS.getRestrictSpecLoc(),
4920 DS.getAtomicSpecLoc()),
4924 // Remember that we parsed a Block type, and remember the type-quals.
4925 D.AddTypeInfo(DeclaratorChunk::getBlockPointer(DS.getTypeQualifiers(),
4931 DeclSpec DS(AttrFactory);
4933 // Complain about rvalue references in C++03, but then go on and build
4935 if (Kind == tok::ampamp)
4936 Diag(Loc, getLangOpts().CPlusPlus11 ?
4937 diag::warn_cxx98_compat_rvalue_reference :
4938 diag::ext_rvalue_reference);
4940 // GNU-style and C++11 attributes are allowed here, as is restrict.
4941 ParseTypeQualifierListOpt(DS);
4942 D.ExtendWithDeclSpec(DS);
4944 // C++ 8.3.2p1: cv-qualified references are ill-formed except when the
4945 // cv-qualifiers are introduced through the use of a typedef or of a
4946 // template type argument, in which case the cv-qualifiers are ignored.
4947 if (DS.getTypeQualifiers() != DeclSpec::TQ_unspecified) {
4948 if (DS.getTypeQualifiers() & DeclSpec::TQ_const)
4949 Diag(DS.getConstSpecLoc(),
4950 diag::err_invalid_reference_qualifier_application) << "const";
4951 if (DS.getTypeQualifiers() & DeclSpec::TQ_volatile)
4952 Diag(DS.getVolatileSpecLoc(),
4953 diag::err_invalid_reference_qualifier_application) << "volatile";
4954 // 'restrict' is permitted as an extension.
4955 if (DS.getTypeQualifiers() & DeclSpec::TQ_atomic)
4956 Diag(DS.getAtomicSpecLoc(),
4957 diag::err_invalid_reference_qualifier_application) << "_Atomic";
4960 // Recursively parse the declarator.
4961 ParseDeclaratorInternal(D, DirectDeclParser);
4963 if (D.getNumTypeObjects() > 0) {
4964 // C++ [dcl.ref]p4: There shall be no references to references.
4965 DeclaratorChunk& InnerChunk = D.getTypeObject(D.getNumTypeObjects() - 1);
4966 if (InnerChunk.Kind == DeclaratorChunk::Reference) {
4967 if (const IdentifierInfo *II = D.getIdentifier())
4968 Diag(InnerChunk.Loc, diag::err_illegal_decl_reference_to_reference)
4971 Diag(InnerChunk.Loc, diag::err_illegal_decl_reference_to_reference)
4974 // Once we've complained about the reference-to-reference, we
4975 // can go ahead and build the (technically ill-formed)
4976 // declarator: reference collapsing will take care of it.
4980 // Remember that we parsed a reference type.
4981 D.AddTypeInfo(DeclaratorChunk::getReference(DS.getTypeQualifiers(), Loc,
4988 // When correcting from misplaced brackets before the identifier, the location
4989 // is saved inside the declarator so that other diagnostic messages can use
4990 // them. This extracts and returns that location, or returns the provided
4991 // location if a stored location does not exist.
4992 static SourceLocation getMissingDeclaratorIdLoc(Declarator &D,
4993 SourceLocation Loc) {
4994 if (D.getName().StartLocation.isInvalid() &&
4995 D.getName().EndLocation.isValid())
4996 return D.getName().EndLocation;
5001 /// ParseDirectDeclarator
5002 /// direct-declarator: [C99 6.7.5]
5003 /// [C99] identifier
5004 /// '(' declarator ')'
5005 /// [GNU] '(' attributes declarator ')'
5006 /// [C90] direct-declarator '[' constant-expression[opt] ']'
5007 /// [C99] direct-declarator '[' type-qual-list[opt] assignment-expr[opt] ']'
5008 /// [C99] direct-declarator '[' 'static' type-qual-list[opt] assign-expr ']'
5009 /// [C99] direct-declarator '[' type-qual-list 'static' assignment-expr ']'
5010 /// [C99] direct-declarator '[' type-qual-list[opt] '*' ']'
5011 /// [C++11] direct-declarator '[' constant-expression[opt] ']'
5012 /// attribute-specifier-seq[opt]
5013 /// direct-declarator '(' parameter-type-list ')'
5014 /// direct-declarator '(' identifier-list[opt] ')'
5015 /// [GNU] direct-declarator '(' parameter-forward-declarations
5016 /// parameter-type-list[opt] ')'
5017 /// [C++] direct-declarator '(' parameter-declaration-clause ')'
5018 /// cv-qualifier-seq[opt] exception-specification[opt]
5019 /// [C++11] direct-declarator '(' parameter-declaration-clause ')'
5020 /// attribute-specifier-seq[opt] cv-qualifier-seq[opt]
5021 /// ref-qualifier[opt] exception-specification[opt]
5022 /// [C++] declarator-id
5023 /// [C++11] declarator-id attribute-specifier-seq[opt]
5025 /// declarator-id: [C++ 8]
5026 /// '...'[opt] id-expression
5027 /// '::'[opt] nested-name-specifier[opt] type-name
5029 /// id-expression: [C++ 5.1]
5033 /// unqualified-id: [C++ 5.1]
5035 /// operator-function-id
5036 /// conversion-function-id
5040 /// Note, any additional constructs added here may need corresponding changes
5041 /// in isConstructorDeclarator.
5042 void Parser::ParseDirectDeclarator(Declarator &D) {
5043 DeclaratorScopeObj DeclScopeObj(*this, D.getCXXScopeSpec());
5045 if (getLangOpts().CPlusPlus && D.mayHaveIdentifier()) {
5046 // Don't parse FOO:BAR as if it were a typo for FOO::BAR inside a class, in
5047 // this context it is a bitfield. Also in range-based for statement colon
5048 // may delimit for-range-declaration.
5049 ColonProtectionRAIIObject X(*this,
5050 D.getContext() == Declarator::MemberContext ||
5051 (D.getContext() == Declarator::ForContext &&
5052 getLangOpts().CPlusPlus11));
5054 // ParseDeclaratorInternal might already have parsed the scope.
5055 if (D.getCXXScopeSpec().isEmpty()) {
5056 bool EnteringContext = D.getContext() == Declarator::FileContext ||
5057 D.getContext() == Declarator::MemberContext;
5058 ParseOptionalCXXScopeSpecifier(D.getCXXScopeSpec(), ParsedType(),
5062 if (D.getCXXScopeSpec().isValid()) {
5063 if (Actions.ShouldEnterDeclaratorScope(getCurScope(),
5064 D.getCXXScopeSpec()))
5065 // Change the declaration context for name lookup, until this function
5066 // is exited (and the declarator has been parsed).
5067 DeclScopeObj.EnterDeclaratorScope();
5070 // C++0x [dcl.fct]p14:
5071 // There is a syntactic ambiguity when an ellipsis occurs at the end of a
5072 // parameter-declaration-clause without a preceding comma. In this case,
5073 // the ellipsis is parsed as part of the abstract-declarator if the type
5074 // of the parameter either names a template parameter pack that has not
5075 // been expanded or contains auto; otherwise, it is parsed as part of the
5076 // parameter-declaration-clause.
5077 if (Tok.is(tok::ellipsis) && D.getCXXScopeSpec().isEmpty() &&
5078 !((D.getContext() == Declarator::PrototypeContext ||
5079 D.getContext() == Declarator::LambdaExprParameterContext ||
5080 D.getContext() == Declarator::BlockLiteralContext) &&
5081 NextToken().is(tok::r_paren) &&
5082 !D.hasGroupingParens() &&
5083 !Actions.containsUnexpandedParameterPacks(D) &&
5084 D.getDeclSpec().getTypeSpecType() != TST_auto)) {
5085 SourceLocation EllipsisLoc = ConsumeToken();
5086 if (isPtrOperatorToken(Tok.getKind(), getLangOpts(), D.getContext())) {
5087 // The ellipsis was put in the wrong place. Recover, and explain to
5088 // the user what they should have done.
5090 if (EllipsisLoc.isValid())
5091 DiagnoseMisplacedEllipsisInDeclarator(EllipsisLoc, D);
5094 D.setEllipsisLoc(EllipsisLoc);
5096 // The ellipsis can't be followed by a parenthesized declarator. We
5097 // check for that in ParseParenDeclarator, after we have disambiguated
5098 // the l_paren token.
5101 if (Tok.isOneOf(tok::identifier, tok::kw_operator, tok::annot_template_id,
5103 // We found something that indicates the start of an unqualified-id.
5104 // Parse that unqualified-id.
5105 bool AllowConstructorName;
5106 if (D.getDeclSpec().hasTypeSpecifier())
5107 AllowConstructorName = false;
5108 else if (D.getCXXScopeSpec().isSet())
5109 AllowConstructorName =
5110 (D.getContext() == Declarator::FileContext ||
5111 D.getContext() == Declarator::MemberContext);
5113 AllowConstructorName = (D.getContext() == Declarator::MemberContext);
5115 SourceLocation TemplateKWLoc;
5116 bool HadScope = D.getCXXScopeSpec().isValid();
5117 if (ParseUnqualifiedId(D.getCXXScopeSpec(),
5118 /*EnteringContext=*/true,
5119 /*AllowDestructorName=*/true,
5120 AllowConstructorName,
5124 // Once we're past the identifier, if the scope was bad, mark the
5125 // whole declarator bad.
5126 D.getCXXScopeSpec().isInvalid()) {
5127 D.SetIdentifier(nullptr, Tok.getLocation());
5128 D.setInvalidType(true);
5130 // ParseUnqualifiedId might have parsed a scope specifier during error
5131 // recovery. If it did so, enter that scope.
5132 if (!HadScope && D.getCXXScopeSpec().isValid() &&
5133 Actions.ShouldEnterDeclaratorScope(getCurScope(),
5134 D.getCXXScopeSpec()))
5135 DeclScopeObj.EnterDeclaratorScope();
5137 // Parsed the unqualified-id; update range information and move along.
5138 if (D.getSourceRange().getBegin().isInvalid())
5139 D.SetRangeBegin(D.getName().getSourceRange().getBegin());
5140 D.SetRangeEnd(D.getName().getSourceRange().getEnd());
5142 goto PastIdentifier;
5144 } else if (Tok.is(tok::identifier) && D.mayHaveIdentifier()) {
5145 assert(!getLangOpts().CPlusPlus &&
5146 "There's a C++-specific check for tok::identifier above");
5147 assert(Tok.getIdentifierInfo() && "Not an identifier?");
5148 D.SetIdentifier(Tok.getIdentifierInfo(), Tok.getLocation());
5149 D.SetRangeEnd(Tok.getLocation());
5151 goto PastIdentifier;
5152 } else if (Tok.is(tok::identifier) && D.diagnoseIdentifier()) {
5153 // A virt-specifier isn't treated as an identifier if it appears after a
5154 // trailing-return-type.
5155 if (D.getContext() != Declarator::TrailingReturnContext ||
5156 !isCXX11VirtSpecifier(Tok)) {
5157 Diag(Tok.getLocation(), diag::err_unexpected_unqualified_id)
5158 << FixItHint::CreateRemoval(Tok.getLocation());
5159 D.SetIdentifier(nullptr, Tok.getLocation());
5161 goto PastIdentifier;
5165 if (Tok.is(tok::l_paren)) {
5166 // direct-declarator: '(' declarator ')'
5167 // direct-declarator: '(' attributes declarator ')'
5168 // Example: 'char (*X)' or 'int (*XX)(void)'
5169 ParseParenDeclarator(D);
5171 // If the declarator was parenthesized, we entered the declarator
5172 // scope when parsing the parenthesized declarator, then exited
5173 // the scope already. Re-enter the scope, if we need to.
5174 if (D.getCXXScopeSpec().isSet()) {
5175 // If there was an error parsing parenthesized declarator, declarator
5176 // scope may have been entered before. Don't do it again.
5177 if (!D.isInvalidType() &&
5178 Actions.ShouldEnterDeclaratorScope(getCurScope(),
5179 D.getCXXScopeSpec()))
5180 // Change the declaration context for name lookup, until this function
5181 // is exited (and the declarator has been parsed).
5182 DeclScopeObj.EnterDeclaratorScope();
5184 } else if (D.mayOmitIdentifier()) {
5185 // This could be something simple like "int" (in which case the declarator
5186 // portion is empty), if an abstract-declarator is allowed.
5187 D.SetIdentifier(nullptr, Tok.getLocation());
5189 // The grammar for abstract-pack-declarator does not allow grouping parens.
5190 // FIXME: Revisit this once core issue 1488 is resolved.
5191 if (D.hasEllipsis() && D.hasGroupingParens())
5192 Diag(PP.getLocForEndOfToken(D.getEllipsisLoc()),
5193 diag::ext_abstract_pack_declarator_parens);
5195 if (Tok.getKind() == tok::annot_pragma_parser_crash)
5197 if (Tok.is(tok::l_square))
5198 return ParseMisplacedBracketDeclarator(D);
5199 if (D.getContext() == Declarator::MemberContext) {
5200 Diag(getMissingDeclaratorIdLoc(D, Tok.getLocation()),
5201 diag::err_expected_member_name_or_semi)
5202 << (D.getDeclSpec().isEmpty() ? SourceRange()
5203 : D.getDeclSpec().getSourceRange());
5204 } else if (getLangOpts().CPlusPlus) {
5205 if (Tok.isOneOf(tok::period, tok::arrow))
5206 Diag(Tok, diag::err_invalid_operator_on_type) << Tok.is(tok::arrow);
5208 SourceLocation Loc = D.getCXXScopeSpec().getEndLoc();
5209 if (Tok.isAtStartOfLine() && Loc.isValid())
5210 Diag(PP.getLocForEndOfToken(Loc), diag::err_expected_unqualified_id)
5211 << getLangOpts().CPlusPlus;
5213 Diag(getMissingDeclaratorIdLoc(D, Tok.getLocation()),
5214 diag::err_expected_unqualified_id)
5215 << getLangOpts().CPlusPlus;
5218 Diag(getMissingDeclaratorIdLoc(D, Tok.getLocation()),
5219 diag::err_expected_either)
5220 << tok::identifier << tok::l_paren;
5222 D.SetIdentifier(nullptr, Tok.getLocation());
5223 D.setInvalidType(true);
5227 assert(D.isPastIdentifier() &&
5228 "Haven't past the location of the identifier yet?");
5230 // Don't parse attributes unless we have parsed an unparenthesized name.
5231 if (D.hasName() && !D.getNumTypeObjects())
5232 MaybeParseCXX11Attributes(D);
5235 if (Tok.is(tok::l_paren)) {
5236 // Enter function-declaration scope, limiting any declarators to the
5237 // function prototype scope, including parameter declarators.
5238 ParseScope PrototypeScope(this,
5239 Scope::FunctionPrototypeScope|Scope::DeclScope|
5240 (D.isFunctionDeclaratorAFunctionDeclaration()
5241 ? Scope::FunctionDeclarationScope : 0));
5243 // The paren may be part of a C++ direct initializer, eg. "int x(1);".
5244 // In such a case, check if we actually have a function declarator; if it
5245 // is not, the declarator has been fully parsed.
5246 bool IsAmbiguous = false;
5247 if (getLangOpts().CPlusPlus && D.mayBeFollowedByCXXDirectInit()) {
5248 // The name of the declarator, if any, is tentatively declared within
5249 // a possible direct initializer.
5250 TentativelyDeclaredIdentifiers.push_back(D.getIdentifier());
5251 bool IsFunctionDecl = isCXXFunctionDeclarator(&IsAmbiguous);
5252 TentativelyDeclaredIdentifiers.pop_back();
5253 if (!IsFunctionDecl)
5256 ParsedAttributes attrs(AttrFactory);
5257 BalancedDelimiterTracker T(*this, tok::l_paren);
5259 ParseFunctionDeclarator(D, attrs, T, IsAmbiguous);
5260 PrototypeScope.Exit();
5261 } else if (Tok.is(tok::l_square)) {
5262 ParseBracketDeclarator(D);
5269 /// ParseParenDeclarator - We parsed the declarator D up to a paren. This is
5270 /// only called before the identifier, so these are most likely just grouping
5271 /// parens for precedence. If we find that these are actually function
5272 /// parameter parens in an abstract-declarator, we call ParseFunctionDeclarator.
5274 /// direct-declarator:
5275 /// '(' declarator ')'
5276 /// [GNU] '(' attributes declarator ')'
5277 /// direct-declarator '(' parameter-type-list ')'
5278 /// direct-declarator '(' identifier-list[opt] ')'
5279 /// [GNU] direct-declarator '(' parameter-forward-declarations
5280 /// parameter-type-list[opt] ')'
5282 void Parser::ParseParenDeclarator(Declarator &D) {
5283 BalancedDelimiterTracker T(*this, tok::l_paren);
5286 assert(!D.isPastIdentifier() && "Should be called before passing identifier");
5288 // Eat any attributes before we look at whether this is a grouping or function
5289 // declarator paren. If this is a grouping paren, the attribute applies to
5290 // the type being built up, for example:
5291 // int (__attribute__(()) *x)(long y)
5292 // If this ends up not being a grouping paren, the attribute applies to the
5293 // first argument, for example:
5294 // int (__attribute__(()) int x)
5295 // In either case, we need to eat any attributes to be able to determine what
5296 // sort of paren this is.
5298 ParsedAttributes attrs(AttrFactory);
5299 bool RequiresArg = false;
5300 if (Tok.is(tok::kw___attribute)) {
5301 ParseGNUAttributes(attrs);
5303 // We require that the argument list (if this is a non-grouping paren) be
5304 // present even if the attribute list was empty.
5308 // Eat any Microsoft extensions.
5309 ParseMicrosoftTypeAttributes(attrs);
5311 // Eat any Borland extensions.
5312 if (Tok.is(tok::kw___pascal))
5313 ParseBorlandTypeAttributes(attrs);
5315 // If we haven't past the identifier yet (or where the identifier would be
5316 // stored, if this is an abstract declarator), then this is probably just
5317 // grouping parens. However, if this could be an abstract-declarator, then
5318 // this could also be the start of function arguments (consider 'void()').
5321 if (!D.mayOmitIdentifier()) {
5322 // If this can't be an abstract-declarator, this *must* be a grouping
5323 // paren, because we haven't seen the identifier yet.
5325 } else if (Tok.is(tok::r_paren) || // 'int()' is a function.
5326 (getLangOpts().CPlusPlus && Tok.is(tok::ellipsis) &&
5327 NextToken().is(tok::r_paren)) || // C++ int(...)
5328 isDeclarationSpecifier() || // 'int(int)' is a function.
5329 isCXX11AttributeSpecifier()) { // 'int([[]]int)' is a function.
5330 // This handles C99 6.7.5.3p11: in "typedef int X; void foo(X)", X is
5331 // considered to be a type, not a K&R identifier-list.
5334 // Otherwise, this is a grouping paren, e.g. 'int (*X)' or 'int(X)'.
5338 // If this is a grouping paren, handle:
5339 // direct-declarator: '(' declarator ')'
5340 // direct-declarator: '(' attributes declarator ')'
5342 SourceLocation EllipsisLoc = D.getEllipsisLoc();
5343 D.setEllipsisLoc(SourceLocation());
5345 bool hadGroupingParens = D.hasGroupingParens();
5346 D.setGroupingParens(true);
5347 ParseDeclaratorInternal(D, &Parser::ParseDirectDeclarator);
5350 D.AddTypeInfo(DeclaratorChunk::getParen(T.getOpenLocation(),
5351 T.getCloseLocation()),
5352 attrs, T.getCloseLocation());
5354 D.setGroupingParens(hadGroupingParens);
5356 // An ellipsis cannot be placed outside parentheses.
5357 if (EllipsisLoc.isValid())
5358 DiagnoseMisplacedEllipsisInDeclarator(EllipsisLoc, D);
5363 // Okay, if this wasn't a grouping paren, it must be the start of a function
5364 // argument list. Recognize that this declarator will never have an
5365 // identifier (and remember where it would have been), then call into
5366 // ParseFunctionDeclarator to handle of argument list.
5367 D.SetIdentifier(nullptr, Tok.getLocation());
5369 // Enter function-declaration scope, limiting any declarators to the
5370 // function prototype scope, including parameter declarators.
5371 ParseScope PrototypeScope(this,
5372 Scope::FunctionPrototypeScope | Scope::DeclScope |
5373 (D.isFunctionDeclaratorAFunctionDeclaration()
5374 ? Scope::FunctionDeclarationScope : 0));
5375 ParseFunctionDeclarator(D, attrs, T, false, RequiresArg);
5376 PrototypeScope.Exit();
5379 /// ParseFunctionDeclarator - We are after the identifier and have parsed the
5380 /// declarator D up to a paren, which indicates that we are parsing function
5383 /// If FirstArgAttrs is non-null, then the caller parsed those arguments
5384 /// immediately after the open paren - they should be considered to be the
5385 /// first argument of a parameter.
5387 /// If RequiresArg is true, then the first argument of the function is required
5388 /// to be present and required to not be an identifier list.
5390 /// For C++, after the parameter-list, it also parses the cv-qualifier-seq[opt],
5391 /// (C++11) ref-qualifier[opt], exception-specification[opt],
5392 /// (C++11) attribute-specifier-seq[opt], and (C++11) trailing-return-type[opt].
5394 /// [C++11] exception-specification:
5395 /// dynamic-exception-specification
5396 /// noexcept-specification
5398 void Parser::ParseFunctionDeclarator(Declarator &D,
5399 ParsedAttributes &FirstArgAttrs,
5400 BalancedDelimiterTracker &Tracker,
5403 assert(getCurScope()->isFunctionPrototypeScope() &&
5404 "Should call from a Function scope");
5405 // lparen is already consumed!
5406 assert(D.isPastIdentifier() && "Should not call before identifier!");
5408 // This should be true when the function has typed arguments.
5409 // Otherwise, it is treated as a K&R-style function.
5410 bool HasProto = false;
5411 // Build up an array of information about the parsed arguments.
5412 SmallVector<DeclaratorChunk::ParamInfo, 16> ParamInfo;
5413 // Remember where we see an ellipsis, if any.
5414 SourceLocation EllipsisLoc;
5416 DeclSpec DS(AttrFactory);
5417 bool RefQualifierIsLValueRef = true;
5418 SourceLocation RefQualifierLoc;
5419 SourceLocation ConstQualifierLoc;
5420 SourceLocation VolatileQualifierLoc;
5421 SourceLocation RestrictQualifierLoc;
5422 ExceptionSpecificationType ESpecType = EST_None;
5423 SourceRange ESpecRange;
5424 SmallVector<ParsedType, 2> DynamicExceptions;
5425 SmallVector<SourceRange, 2> DynamicExceptionRanges;
5426 ExprResult NoexceptExpr;
5427 CachedTokens *ExceptionSpecTokens = 0;
5428 ParsedAttributes FnAttrs(AttrFactory);
5429 TypeResult TrailingReturnType;
5431 /* LocalEndLoc is the end location for the local FunctionTypeLoc.
5432 EndLoc is the end location for the function declarator.
5433 They differ for trailing return types. */
5434 SourceLocation StartLoc, LocalEndLoc, EndLoc;
5435 SourceLocation LParenLoc, RParenLoc;
5436 LParenLoc = Tracker.getOpenLocation();
5437 StartLoc = LParenLoc;
5439 if (isFunctionDeclaratorIdentifierList()) {
5441 Diag(Tok, diag::err_argument_required_after_attribute);
5443 ParseFunctionDeclaratorIdentifierList(D, ParamInfo);
5445 Tracker.consumeClose();
5446 RParenLoc = Tracker.getCloseLocation();
5447 LocalEndLoc = RParenLoc;
5450 if (Tok.isNot(tok::r_paren))
5451 ParseParameterDeclarationClause(D, FirstArgAttrs, ParamInfo,
5453 else if (RequiresArg)
5454 Diag(Tok, diag::err_argument_required_after_attribute);
5456 HasProto = ParamInfo.size() || getLangOpts().CPlusPlus;
5458 // If we have the closing ')', eat it.
5459 Tracker.consumeClose();
5460 RParenLoc = Tracker.getCloseLocation();
5461 LocalEndLoc = RParenLoc;
5464 if (getLangOpts().CPlusPlus) {
5465 // FIXME: Accept these components in any order, and produce fixits to
5466 // correct the order if the user gets it wrong. Ideally we should deal
5467 // with the pure-specifier in the same way.
5469 // Parse cv-qualifier-seq[opt].
5470 ParseTypeQualifierListOpt(DS, AR_NoAttributesParsed,
5471 /*AtomicAllowed*/ false);
5472 if (!DS.getSourceRange().getEnd().isInvalid()) {
5473 EndLoc = DS.getSourceRange().getEnd();
5474 ConstQualifierLoc = DS.getConstSpecLoc();
5475 VolatileQualifierLoc = DS.getVolatileSpecLoc();
5476 RestrictQualifierLoc = DS.getRestrictSpecLoc();
5479 // Parse ref-qualifier[opt].
5480 if (ParseRefQualifier(RefQualifierIsLValueRef, RefQualifierLoc))
5481 EndLoc = RefQualifierLoc;
5483 // C++11 [expr.prim.general]p3:
5484 // If a declaration declares a member function or member function
5485 // template of a class X, the expression this is a prvalue of type
5486 // "pointer to cv-qualifier-seq X" between the optional cv-qualifer-seq
5487 // and the end of the function-definition, member-declarator, or
5489 // FIXME: currently, "static" case isn't handled correctly.
5490 bool IsCXX11MemberFunction =
5491 getLangOpts().CPlusPlus11 &&
5492 D.getDeclSpec().getStorageClassSpec() != DeclSpec::SCS_typedef &&
5493 (D.getContext() == Declarator::MemberContext
5494 ? !D.getDeclSpec().isFriendSpecified()
5495 : D.getContext() == Declarator::FileContext &&
5496 D.getCXXScopeSpec().isValid() &&
5497 Actions.CurContext->isRecord());
5498 Sema::CXXThisScopeRAII ThisScope(Actions,
5499 dyn_cast<CXXRecordDecl>(Actions.CurContext),
5500 DS.getTypeQualifiers() |
5501 (D.getDeclSpec().isConstexprSpecified() &&
5502 !getLangOpts().CPlusPlus14
5503 ? Qualifiers::Const : 0),
5504 IsCXX11MemberFunction);
5506 // Parse exception-specification[opt].
5507 bool Delayed = D.isFirstDeclarationOfMember() &&
5508 D.isFunctionDeclaratorAFunctionDeclaration();
5509 if (Delayed && Actions.isLibstdcxxEagerExceptionSpecHack(D) &&
5510 GetLookAheadToken(0).is(tok::kw_noexcept) &&
5511 GetLookAheadToken(1).is(tok::l_paren) &&
5512 GetLookAheadToken(2).is(tok::kw_noexcept) &&
5513 GetLookAheadToken(3).is(tok::l_paren) &&
5514 GetLookAheadToken(4).is(tok::identifier) &&
5515 GetLookAheadToken(4).getIdentifierInfo()->isStr("swap")) {
5516 // HACK: We've got an exception-specification
5517 // noexcept(noexcept(swap(...)))
5519 // noexcept(noexcept(swap(...)) && noexcept(swap(...)))
5520 // on a 'swap' member function. This is a libstdc++ bug; the lookup
5521 // for 'swap' will only find the function we're currently declaring,
5522 // whereas it expects to find a non-member swap through ADL. Turn off
5523 // delayed parsing to give it a chance to find what it expects.
5526 ESpecType = tryParseExceptionSpecification(Delayed,
5529 DynamicExceptionRanges,
5531 ExceptionSpecTokens);
5532 if (ESpecType != EST_None)
5533 EndLoc = ESpecRange.getEnd();
5535 // Parse attribute-specifier-seq[opt]. Per DR 979 and DR 1297, this goes
5536 // after the exception-specification.
5537 MaybeParseCXX11Attributes(FnAttrs);
5539 // Parse trailing-return-type[opt].
5540 LocalEndLoc = EndLoc;
5541 if (getLangOpts().CPlusPlus11 && Tok.is(tok::arrow)) {
5542 Diag(Tok, diag::warn_cxx98_compat_trailing_return_type);
5543 if (D.getDeclSpec().getTypeSpecType() == TST_auto)
5544 StartLoc = D.getDeclSpec().getTypeSpecTypeLoc();
5545 LocalEndLoc = Tok.getLocation();
5547 TrailingReturnType = ParseTrailingReturnType(Range);
5548 EndLoc = Range.getEnd();
5553 // Remember that we parsed a function type, and remember the attributes.
5554 D.AddTypeInfo(DeclaratorChunk::getFunction(HasProto,
5557 ParamInfo.data(), ParamInfo.size(),
5558 EllipsisLoc, RParenLoc,
5559 DS.getTypeQualifiers(),
5560 RefQualifierIsLValueRef,
5561 RefQualifierLoc, ConstQualifierLoc,
5562 VolatileQualifierLoc,
5563 RestrictQualifierLoc,
5564 /*MutableLoc=*/SourceLocation(),
5565 ESpecType, ESpecRange.getBegin(),
5566 DynamicExceptions.data(),
5567 DynamicExceptionRanges.data(),
5568 DynamicExceptions.size(),
5569 NoexceptExpr.isUsable() ?
5570 NoexceptExpr.get() : nullptr,
5571 ExceptionSpecTokens,
5572 StartLoc, LocalEndLoc, D,
5573 TrailingReturnType),
5577 /// ParseRefQualifier - Parses a member function ref-qualifier. Returns
5578 /// true if a ref-qualifier is found.
5579 bool Parser::ParseRefQualifier(bool &RefQualifierIsLValueRef,
5580 SourceLocation &RefQualifierLoc) {
5581 if (Tok.isOneOf(tok::amp, tok::ampamp)) {
5582 Diag(Tok, getLangOpts().CPlusPlus11 ?
5583 diag::warn_cxx98_compat_ref_qualifier :
5584 diag::ext_ref_qualifier);
5586 RefQualifierIsLValueRef = Tok.is(tok::amp);
5587 RefQualifierLoc = ConsumeToken();
5593 /// isFunctionDeclaratorIdentifierList - This parameter list may have an
5594 /// identifier list form for a K&R-style function: void foo(a,b,c)
5596 /// Note that identifier-lists are only allowed for normal declarators, not for
5597 /// abstract-declarators.
5598 bool Parser::isFunctionDeclaratorIdentifierList() {
5599 return !getLangOpts().CPlusPlus
5600 && Tok.is(tok::identifier)
5601 && !TryAltiVecVectorToken()
5602 // K&R identifier lists can't have typedefs as identifiers, per C99
5604 && (TryAnnotateTypeOrScopeToken() || !Tok.is(tok::annot_typename))
5605 // Identifier lists follow a really simple grammar: the identifiers can
5606 // be followed *only* by a ", identifier" or ")". However, K&R
5607 // identifier lists are really rare in the brave new modern world, and
5608 // it is very common for someone to typo a type in a non-K&R style
5609 // list. If we are presented with something like: "void foo(intptr x,
5610 // float y)", we don't want to start parsing the function declarator as
5611 // though it is a K&R style declarator just because intptr is an
5614 // To handle this, we check to see if the token after the first
5615 // identifier is a "," or ")". Only then do we parse it as an
5617 && (NextToken().is(tok::comma) || NextToken().is(tok::r_paren));
5620 /// ParseFunctionDeclaratorIdentifierList - While parsing a function declarator
5621 /// we found a K&R-style identifier list instead of a typed parameter list.
5623 /// After returning, ParamInfo will hold the parsed parameters.
5625 /// identifier-list: [C99 6.7.5]
5627 /// identifier-list ',' identifier
5629 void Parser::ParseFunctionDeclaratorIdentifierList(
5631 SmallVectorImpl<DeclaratorChunk::ParamInfo> &ParamInfo) {
5632 // If there was no identifier specified for the declarator, either we are in
5633 // an abstract-declarator, or we are in a parameter declarator which was found
5634 // to be abstract. In abstract-declarators, identifier lists are not valid:
5636 if (!D.getIdentifier())
5637 Diag(Tok, diag::ext_ident_list_in_param);
5639 // Maintain an efficient lookup of params we have seen so far.
5640 llvm::SmallSet<const IdentifierInfo*, 16> ParamsSoFar;
5643 // If this isn't an identifier, report the error and skip until ')'.
5644 if (Tok.isNot(tok::identifier)) {
5645 Diag(Tok, diag::err_expected) << tok::identifier;
5646 SkipUntil(tok::r_paren, StopAtSemi | StopBeforeMatch);
5647 // Forget we parsed anything.
5652 IdentifierInfo *ParmII = Tok.getIdentifierInfo();
5654 // Reject 'typedef int y; int test(x, y)', but continue parsing.
5655 if (Actions.getTypeName(*ParmII, Tok.getLocation(), getCurScope()))
5656 Diag(Tok, diag::err_unexpected_typedef_ident) << ParmII;
5658 // Verify that the argument identifier has not already been mentioned.
5659 if (!ParamsSoFar.insert(ParmII).second) {
5660 Diag(Tok, diag::err_param_redefinition) << ParmII;
5662 // Remember this identifier in ParamInfo.
5663 ParamInfo.push_back(DeclaratorChunk::ParamInfo(ParmII,
5668 // Eat the identifier.
5670 // The list continues if we see a comma.
5671 } while (TryConsumeToken(tok::comma));
5674 /// ParseParameterDeclarationClause - Parse a (possibly empty) parameter-list
5675 /// after the opening parenthesis. This function will not parse a K&R-style
5676 /// identifier list.
5678 /// D is the declarator being parsed. If FirstArgAttrs is non-null, then the
5679 /// caller parsed those arguments immediately after the open paren - they should
5680 /// be considered to be part of the first parameter.
5682 /// After returning, ParamInfo will hold the parsed parameters. EllipsisLoc will
5683 /// be the location of the ellipsis, if any was parsed.
5685 /// parameter-type-list: [C99 6.7.5]
5687 /// parameter-list ',' '...'
5688 /// [C++] parameter-list '...'
5690 /// parameter-list: [C99 6.7.5]
5691 /// parameter-declaration
5692 /// parameter-list ',' parameter-declaration
5694 /// parameter-declaration: [C99 6.7.5]
5695 /// declaration-specifiers declarator
5696 /// [C++] declaration-specifiers declarator '=' assignment-expression
5697 /// [C++11] initializer-clause
5698 /// [GNU] declaration-specifiers declarator attributes
5699 /// declaration-specifiers abstract-declarator[opt]
5700 /// [C++] declaration-specifiers abstract-declarator[opt]
5701 /// '=' assignment-expression
5702 /// [GNU] declaration-specifiers abstract-declarator[opt] attributes
5703 /// [C++11] attribute-specifier-seq parameter-declaration
5705 void Parser::ParseParameterDeclarationClause(
5707 ParsedAttributes &FirstArgAttrs,
5708 SmallVectorImpl<DeclaratorChunk::ParamInfo> &ParamInfo,
5709 SourceLocation &EllipsisLoc) {
5711 // FIXME: Issue a diagnostic if we parsed an attribute-specifier-seq
5712 // before deciding this was a parameter-declaration-clause.
5713 if (TryConsumeToken(tok::ellipsis, EllipsisLoc))
5716 // Parse the declaration-specifiers.
5717 // Just use the ParsingDeclaration "scope" of the declarator.
5718 DeclSpec DS(AttrFactory);
5720 // Parse any C++11 attributes.
5721 MaybeParseCXX11Attributes(DS.getAttributes());
5723 // Skip any Microsoft attributes before a param.
5724 MaybeParseMicrosoftAttributes(DS.getAttributes());
5726 SourceLocation DSStart = Tok.getLocation();
5728 // If the caller parsed attributes for the first argument, add them now.
5729 // Take them so that we only apply the attributes to the first parameter.
5730 // FIXME: If we can leave the attributes in the token stream somehow, we can
5731 // get rid of a parameter (FirstArgAttrs) and this statement. It might be
5733 DS.takeAttributesFrom(FirstArgAttrs);
5735 ParseDeclarationSpecifiers(DS);
5738 // Parse the declarator. This is "PrototypeContext" or
5739 // "LambdaExprParameterContext", because we must accept either
5740 // 'declarator' or 'abstract-declarator' here.
5741 Declarator ParmDeclarator(DS,
5742 D.getContext() == Declarator::LambdaExprContext ?
5743 Declarator::LambdaExprParameterContext :
5744 Declarator::PrototypeContext);
5745 ParseDeclarator(ParmDeclarator);
5747 // Parse GNU attributes, if present.
5748 MaybeParseGNUAttributes(ParmDeclarator);
5750 // Remember this parsed parameter in ParamInfo.
5751 IdentifierInfo *ParmII = ParmDeclarator.getIdentifier();
5753 // DefArgToks is used when the parsing of default arguments needs
5755 CachedTokens *DefArgToks = nullptr;
5757 // If no parameter was specified, verify that *something* was specified,
5758 // otherwise we have a missing type and identifier.
5759 if (DS.isEmpty() && ParmDeclarator.getIdentifier() == nullptr &&
5760 ParmDeclarator.getNumTypeObjects() == 0) {
5761 // Completely missing, emit error.
5762 Diag(DSStart, diag::err_missing_param);
5764 // Otherwise, we have something. Add it and let semantic analysis try
5765 // to grok it and add the result to the ParamInfo we are building.
5767 // Last chance to recover from a misplaced ellipsis in an attempted
5768 // parameter pack declaration.
5769 if (Tok.is(tok::ellipsis) &&
5770 (NextToken().isNot(tok::r_paren) ||
5771 (!ParmDeclarator.getEllipsisLoc().isValid() &&
5772 !Actions.isUnexpandedParameterPackPermitted())) &&
5773 Actions.containsUnexpandedParameterPacks(ParmDeclarator))
5774 DiagnoseMisplacedEllipsisInDeclarator(ConsumeToken(), ParmDeclarator);
5776 // Inform the actions module about the parameter declarator, so it gets
5777 // added to the current scope.
5778 Decl *Param = Actions.ActOnParamDeclarator(getCurScope(), ParmDeclarator);
5779 // Parse the default argument, if any. We parse the default
5780 // arguments in all dialects; the semantic analysis in
5781 // ActOnParamDefaultArgument will reject the default argument in
5783 if (Tok.is(tok::equal)) {
5784 SourceLocation EqualLoc = Tok.getLocation();
5786 // Parse the default argument
5787 if (D.getContext() == Declarator::MemberContext) {
5788 // If we're inside a class definition, cache the tokens
5789 // corresponding to the default argument. We'll actually parse
5790 // them when we see the end of the class definition.
5791 // FIXME: Can we use a smart pointer for Toks?
5792 DefArgToks = new CachedTokens;
5794 SourceLocation ArgStartLoc = NextToken().getLocation();
5795 if (!ConsumeAndStoreInitializer(*DefArgToks, CIK_DefaultArgument)) {
5797 DefArgToks = nullptr;
5798 Actions.ActOnParamDefaultArgumentError(Param, EqualLoc);
5800 Actions.ActOnParamUnparsedDefaultArgument(Param, EqualLoc,
5807 // The argument isn't actually potentially evaluated unless it is
5809 EnterExpressionEvaluationContext Eval(Actions,
5810 Sema::PotentiallyEvaluatedIfUsed,
5813 ExprResult DefArgResult;
5814 if (getLangOpts().CPlusPlus11 && Tok.is(tok::l_brace)) {
5815 Diag(Tok, diag::warn_cxx98_compat_generalized_initializer_lists);
5816 DefArgResult = ParseBraceInitializer();
5818 DefArgResult = ParseAssignmentExpression();
5819 DefArgResult = Actions.CorrectDelayedTyposInExpr(DefArgResult);
5820 if (DefArgResult.isInvalid()) {
5821 Actions.ActOnParamDefaultArgumentError(Param, EqualLoc);
5822 SkipUntil(tok::comma, tok::r_paren, StopAtSemi | StopBeforeMatch);
5824 // Inform the actions module about the default argument
5825 Actions.ActOnParamDefaultArgument(Param, EqualLoc,
5826 DefArgResult.get());
5831 ParamInfo.push_back(DeclaratorChunk::ParamInfo(ParmII,
5832 ParmDeclarator.getIdentifierLoc(),
5833 Param, DefArgToks));
5836 if (TryConsumeToken(tok::ellipsis, EllipsisLoc)) {
5837 if (!getLangOpts().CPlusPlus) {
5838 // We have ellipsis without a preceding ',', which is ill-formed
5839 // in C. Complain and provide the fix.
5840 Diag(EllipsisLoc, diag::err_missing_comma_before_ellipsis)
5841 << FixItHint::CreateInsertion(EllipsisLoc, ", ");
5842 } else if (ParmDeclarator.getEllipsisLoc().isValid() ||
5843 Actions.containsUnexpandedParameterPacks(ParmDeclarator)) {
5844 // It looks like this was supposed to be a parameter pack. Warn and
5845 // point out where the ellipsis should have gone.
5846 SourceLocation ParmEllipsis = ParmDeclarator.getEllipsisLoc();
5847 Diag(EllipsisLoc, diag::warn_misplaced_ellipsis_vararg)
5848 << ParmEllipsis.isValid() << ParmEllipsis;
5849 if (ParmEllipsis.isValid()) {
5851 diag::note_misplaced_ellipsis_vararg_existing_ellipsis);
5853 Diag(ParmDeclarator.getIdentifierLoc(),
5854 diag::note_misplaced_ellipsis_vararg_add_ellipsis)
5855 << FixItHint::CreateInsertion(ParmDeclarator.getIdentifierLoc(),
5857 << !ParmDeclarator.hasName();
5859 Diag(EllipsisLoc, diag::note_misplaced_ellipsis_vararg_add_comma)
5860 << FixItHint::CreateInsertion(EllipsisLoc, ", ");
5863 // We can't have any more parameters after an ellipsis.
5867 // If the next token is a comma, consume it and keep reading arguments.
5868 } while (TryConsumeToken(tok::comma));
5871 /// [C90] direct-declarator '[' constant-expression[opt] ']'
5872 /// [C99] direct-declarator '[' type-qual-list[opt] assignment-expr[opt] ']'
5873 /// [C99] direct-declarator '[' 'static' type-qual-list[opt] assign-expr ']'
5874 /// [C99] direct-declarator '[' type-qual-list 'static' assignment-expr ']'
5875 /// [C99] direct-declarator '[' type-qual-list[opt] '*' ']'
5876 /// [C++11] direct-declarator '[' constant-expression[opt] ']'
5877 /// attribute-specifier-seq[opt]
5878 void Parser::ParseBracketDeclarator(Declarator &D) {
5879 if (CheckProhibitedCXX11Attribute())
5882 BalancedDelimiterTracker T(*this, tok::l_square);
5885 // C array syntax has many features, but by-far the most common is [] and [4].
5886 // This code does a fast path to handle some of the most obvious cases.
5887 if (Tok.getKind() == tok::r_square) {
5889 ParsedAttributes attrs(AttrFactory);
5890 MaybeParseCXX11Attributes(attrs);
5892 // Remember that we parsed the empty array type.
5893 D.AddTypeInfo(DeclaratorChunk::getArray(0, false, false, nullptr,
5894 T.getOpenLocation(),
5895 T.getCloseLocation()),
5896 attrs, T.getCloseLocation());
5898 } else if (Tok.getKind() == tok::numeric_constant &&
5899 GetLookAheadToken(1).is(tok::r_square)) {
5900 // [4] is very common. Parse the numeric constant expression.
5901 ExprResult ExprRes(Actions.ActOnNumericConstant(Tok, getCurScope()));
5905 ParsedAttributes attrs(AttrFactory);
5906 MaybeParseCXX11Attributes(attrs);
5908 // Remember that we parsed a array type, and remember its features.
5909 D.AddTypeInfo(DeclaratorChunk::getArray(0, false, false,
5911 T.getOpenLocation(),
5912 T.getCloseLocation()),
5913 attrs, T.getCloseLocation());
5917 // If valid, this location is the position where we read the 'static' keyword.
5918 SourceLocation StaticLoc;
5919 TryConsumeToken(tok::kw_static, StaticLoc);
5921 // If there is a type-qualifier-list, read it now.
5922 // Type qualifiers in an array subscript are a C99 feature.
5923 DeclSpec DS(AttrFactory);
5924 ParseTypeQualifierListOpt(DS, AR_CXX11AttributesParsed);
5926 // If we haven't already read 'static', check to see if there is one after the
5927 // type-qualifier-list.
5928 if (!StaticLoc.isValid())
5929 TryConsumeToken(tok::kw_static, StaticLoc);
5931 // Handle "direct-declarator [ type-qual-list[opt] * ]".
5932 bool isStar = false;
5933 ExprResult NumElements;
5935 // Handle the case where we have '[*]' as the array size. However, a leading
5936 // star could be the start of an expression, for example 'X[*p + 4]'. Verify
5937 // the token after the star is a ']'. Since stars in arrays are
5938 // infrequent, use of lookahead is not costly here.
5939 if (Tok.is(tok::star) && GetLookAheadToken(1).is(tok::r_square)) {
5940 ConsumeToken(); // Eat the '*'.
5942 if (StaticLoc.isValid()) {
5943 Diag(StaticLoc, diag::err_unspecified_vla_size_with_static);
5944 StaticLoc = SourceLocation(); // Drop the static.
5947 } else if (Tok.isNot(tok::r_square)) {
5948 // Note, in C89, this production uses the constant-expr production instead
5949 // of assignment-expr. The only difference is that assignment-expr allows
5950 // things like '=' and '*='. Sema rejects these in C89 mode because they
5951 // are not i-c-e's, so we don't need to distinguish between the two here.
5953 // Parse the constant-expression or assignment-expression now (depending
5955 if (getLangOpts().CPlusPlus) {
5956 NumElements = ParseConstantExpression();
5958 EnterExpressionEvaluationContext Unevaluated(Actions,
5959 Sema::ConstantEvaluated);
5961 Actions.CorrectDelayedTyposInExpr(ParseAssignmentExpression());
5964 if (StaticLoc.isValid()) {
5965 Diag(StaticLoc, diag::err_unspecified_size_with_static);
5966 StaticLoc = SourceLocation(); // Drop the static.
5970 // If there was an error parsing the assignment-expression, recover.
5971 if (NumElements.isInvalid()) {
5972 D.setInvalidType(true);
5973 // If the expression was invalid, skip it.
5974 SkipUntil(tok::r_square, StopAtSemi);
5980 ParsedAttributes attrs(AttrFactory);
5981 MaybeParseCXX11Attributes(attrs);
5983 // Remember that we parsed a array type, and remember its features.
5984 D.AddTypeInfo(DeclaratorChunk::getArray(DS.getTypeQualifiers(),
5985 StaticLoc.isValid(), isStar,
5987 T.getOpenLocation(),
5988 T.getCloseLocation()),
5989 attrs, T.getCloseLocation());
5992 /// Diagnose brackets before an identifier.
5993 void Parser::ParseMisplacedBracketDeclarator(Declarator &D) {
5994 assert(Tok.is(tok::l_square) && "Missing opening bracket");
5995 assert(!D.mayOmitIdentifier() && "Declarator cannot omit identifier");
5997 SourceLocation StartBracketLoc = Tok.getLocation();
5998 Declarator TempDeclarator(D.getDeclSpec(), D.getContext());
6000 while (Tok.is(tok::l_square)) {
6001 ParseBracketDeclarator(TempDeclarator);
6004 // Stuff the location of the start of the brackets into the Declarator.
6005 // The diagnostics from ParseDirectDeclarator will make more sense if
6006 // they use this location instead.
6007 if (Tok.is(tok::semi))
6008 D.getName().EndLocation = StartBracketLoc;
6010 SourceLocation SuggestParenLoc = Tok.getLocation();
6012 // Now that the brackets are removed, try parsing the declarator again.
6013 ParseDeclaratorInternal(D, &Parser::ParseDirectDeclarator);
6015 // Something went wrong parsing the brackets, in which case,
6016 // ParseBracketDeclarator has emitted an error, and we don't need to emit
6018 if (TempDeclarator.getNumTypeObjects() == 0)
6021 // Determine if parens will need to be suggested in the diagnostic.
6022 bool NeedParens = false;
6023 if (D.getNumTypeObjects() != 0) {
6024 switch (D.getTypeObject(D.getNumTypeObjects() - 1).Kind) {
6025 case DeclaratorChunk::Pointer:
6026 case DeclaratorChunk::Reference:
6027 case DeclaratorChunk::BlockPointer:
6028 case DeclaratorChunk::MemberPointer:
6031 case DeclaratorChunk::Array:
6032 case DeclaratorChunk::Function:
6033 case DeclaratorChunk::Paren:
6039 // Create a DeclaratorChunk for the inserted parens.
6040 ParsedAttributes attrs(AttrFactory);
6041 SourceLocation EndLoc = PP.getLocForEndOfToken(D.getLocEnd());
6042 D.AddTypeInfo(DeclaratorChunk::getParen(SuggestParenLoc, EndLoc), attrs,
6046 // Adding back the bracket info to the end of the Declarator.
6047 for (unsigned i = 0, e = TempDeclarator.getNumTypeObjects(); i < e; ++i) {
6048 const DeclaratorChunk &Chunk = TempDeclarator.getTypeObject(i);
6049 ParsedAttributes attrs(AttrFactory);
6050 attrs.set(Chunk.Common.AttrList);
6051 D.AddTypeInfo(Chunk, attrs, SourceLocation());
6054 // The missing identifier would have been diagnosed in ParseDirectDeclarator.
6055 // If parentheses are required, always suggest them.
6056 if (!D.getIdentifier() && !NeedParens)
6059 SourceLocation EndBracketLoc = TempDeclarator.getLocEnd();
6061 // Generate the move bracket error message.
6062 SourceRange BracketRange(StartBracketLoc, EndBracketLoc);
6063 SourceLocation EndLoc = PP.getLocForEndOfToken(D.getLocEnd());
6066 Diag(EndLoc, diag::err_brackets_go_after_unqualified_id)
6067 << getLangOpts().CPlusPlus
6068 << FixItHint::CreateInsertion(SuggestParenLoc, "(")
6069 << FixItHint::CreateInsertion(EndLoc, ")")
6070 << FixItHint::CreateInsertionFromRange(
6071 EndLoc, CharSourceRange(BracketRange, true))
6072 << FixItHint::CreateRemoval(BracketRange);
6074 Diag(EndLoc, diag::err_brackets_go_after_unqualified_id)
6075 << getLangOpts().CPlusPlus
6076 << FixItHint::CreateInsertionFromRange(
6077 EndLoc, CharSourceRange(BracketRange, true))
6078 << FixItHint::CreateRemoval(BracketRange);
6082 /// [GNU] typeof-specifier:
6083 /// typeof ( expressions )
6084 /// typeof ( type-name )
6085 /// [GNU/C++] typeof unary-expression
6087 void Parser::ParseTypeofSpecifier(DeclSpec &DS) {
6088 assert(Tok.is(tok::kw_typeof) && "Not a typeof specifier");
6090 SourceLocation StartLoc = ConsumeToken();
6092 const bool hasParens = Tok.is(tok::l_paren);
6094 EnterExpressionEvaluationContext Unevaluated(Actions, Sema::Unevaluated,
6095 Sema::ReuseLambdaContextDecl);
6099 SourceRange CastRange;
6100 ExprResult Operand = Actions.CorrectDelayedTyposInExpr(
6101 ParseExprAfterUnaryExprOrTypeTrait(OpTok, isCastExpr, CastTy, CastRange));
6103 DS.setTypeofParensRange(CastRange);
6105 if (CastRange.getEnd().isInvalid())
6106 // FIXME: Not accurate, the range gets one token more than it should.
6107 DS.SetRangeEnd(Tok.getLocation());
6109 DS.SetRangeEnd(CastRange.getEnd());
6113 DS.SetTypeSpecError();
6117 const char *PrevSpec = nullptr;
6119 // Check for duplicate type specifiers (e.g. "int typeof(int)").
6120 if (DS.SetTypeSpecType(DeclSpec::TST_typeofType, StartLoc, PrevSpec,
6122 Actions.getASTContext().getPrintingPolicy()))
6123 Diag(StartLoc, DiagID) << PrevSpec;
6127 // If we get here, the operand to the typeof was an expresion.
6128 if (Operand.isInvalid()) {
6129 DS.SetTypeSpecError();
6133 // We might need to transform the operand if it is potentially evaluated.
6134 Operand = Actions.HandleExprEvaluationContextForTypeof(Operand.get());
6135 if (Operand.isInvalid()) {
6136 DS.SetTypeSpecError();
6140 const char *PrevSpec = nullptr;
6142 // Check for duplicate type specifiers (e.g. "int typeof(int)").
6143 if (DS.SetTypeSpecType(DeclSpec::TST_typeofExpr, StartLoc, PrevSpec,
6144 DiagID, Operand.get(),
6145 Actions.getASTContext().getPrintingPolicy()))
6146 Diag(StartLoc, DiagID) << PrevSpec;
6149 /// [C11] atomic-specifier:
6150 /// _Atomic ( type-name )
6152 void Parser::ParseAtomicSpecifier(DeclSpec &DS) {
6153 assert(Tok.is(tok::kw__Atomic) && NextToken().is(tok::l_paren) &&
6154 "Not an atomic specifier");
6156 SourceLocation StartLoc = ConsumeToken();
6157 BalancedDelimiterTracker T(*this, tok::l_paren);
6158 if (T.consumeOpen())
6161 TypeResult Result = ParseTypeName();
6162 if (Result.isInvalid()) {
6163 SkipUntil(tok::r_paren, StopAtSemi);
6170 if (T.getCloseLocation().isInvalid())
6173 DS.setTypeofParensRange(T.getRange());
6174 DS.SetRangeEnd(T.getCloseLocation());
6176 const char *PrevSpec = nullptr;
6178 if (DS.SetTypeSpecType(DeclSpec::TST_atomic, StartLoc, PrevSpec,
6179 DiagID, Result.get(),
6180 Actions.getASTContext().getPrintingPolicy()))
6181 Diag(StartLoc, DiagID) << PrevSpec;
6185 /// TryAltiVecVectorTokenOutOfLine - Out of line body that should only be called
6186 /// from TryAltiVecVectorToken.
6187 bool Parser::TryAltiVecVectorTokenOutOfLine() {
6188 Token Next = NextToken();
6189 switch (Next.getKind()) {
6190 default: return false;
6193 case tok::kw_signed:
6194 case tok::kw_unsigned:
6199 case tok::kw_double:
6201 case tok::kw___bool:
6202 case tok::kw___pixel:
6203 Tok.setKind(tok::kw___vector);
6205 case tok::identifier:
6206 if (Next.getIdentifierInfo() == Ident_pixel) {
6207 Tok.setKind(tok::kw___vector);
6210 if (Next.getIdentifierInfo() == Ident_bool) {
6211 Tok.setKind(tok::kw___vector);
6218 bool Parser::TryAltiVecTokenOutOfLine(DeclSpec &DS, SourceLocation Loc,
6219 const char *&PrevSpec, unsigned &DiagID,
6221 const PrintingPolicy &Policy = Actions.getASTContext().getPrintingPolicy();
6222 if (Tok.getIdentifierInfo() == Ident_vector) {
6223 Token Next = NextToken();
6224 switch (Next.getKind()) {
6227 case tok::kw_signed:
6228 case tok::kw_unsigned:
6233 case tok::kw_double:
6235 case tok::kw___bool:
6236 case tok::kw___pixel:
6237 isInvalid = DS.SetTypeAltiVecVector(true, Loc, PrevSpec, DiagID, Policy);
6239 case tok::identifier:
6240 if (Next.getIdentifierInfo() == Ident_pixel) {
6241 isInvalid = DS.SetTypeAltiVecVector(true, Loc, PrevSpec, DiagID,Policy);
6244 if (Next.getIdentifierInfo() == Ident_bool) {
6245 isInvalid = DS.SetTypeAltiVecVector(true, Loc, PrevSpec, DiagID,Policy);
6252 } else if ((Tok.getIdentifierInfo() == Ident_pixel) &&
6253 DS.isTypeAltiVecVector()) {
6254 isInvalid = DS.SetTypeAltiVecPixel(true, Loc, PrevSpec, DiagID, Policy);
6256 } else if ((Tok.getIdentifierInfo() == Ident_bool) &&
6257 DS.isTypeAltiVecVector()) {
6258 isInvalid = DS.SetTypeAltiVecBool(true, Loc, PrevSpec, DiagID, Policy);