1 //===--- ParseDecl.cpp - Declaration Parsing --------------------*- C++ -*-===//
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
7 //===----------------------------------------------------------------------===//
9 // This file implements the Declaration portions of the Parser interfaces.
11 //===----------------------------------------------------------------------===//
13 #include "clang/Parse/Parser.h"
14 #include "clang/Parse/RAIIObjectsForParser.h"
15 #include "clang/AST/ASTContext.h"
16 #include "clang/AST/DeclTemplate.h"
17 #include "clang/AST/PrettyDeclStackTrace.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/Scope.h"
26 #include "llvm/ADT/Optional.h"
27 #include "llvm/ADT/SmallSet.h"
28 #include "llvm/ADT/SmallString.h"
29 #include "llvm/ADT/StringSwitch.h"
31 using namespace clang;
33 //===----------------------------------------------------------------------===//
34 // C99 6.7: Declarations.
35 //===----------------------------------------------------------------------===//
38 /// type-name: [C99 6.7.6]
39 /// specifier-qualifier-list abstract-declarator[opt]
41 /// Called type-id in C++.
42 TypeResult Parser::ParseTypeName(SourceRange *Range,
43 DeclaratorContext Context,
46 ParsedAttributes *Attrs) {
47 DeclSpecContext DSC = getDeclSpecContextFromDeclaratorContext(Context);
48 if (DSC == DeclSpecContext::DSC_normal)
49 DSC = DeclSpecContext::DSC_type_specifier;
51 // Parse the common declaration-specifiers piece.
52 DeclSpec DS(AttrFactory);
54 DS.addAttributes(*Attrs);
55 ParseSpecifierQualifierList(DS, AS, DSC);
57 *OwnedType = DS.isTypeSpecOwned() ? DS.getRepAsDecl() : nullptr;
59 // Parse the abstract-declarator, if present.
60 Declarator DeclaratorInfo(DS, Context);
61 ParseDeclarator(DeclaratorInfo);
63 *Range = DeclaratorInfo.getSourceRange();
65 if (DeclaratorInfo.isInvalidType())
68 return Actions.ActOnTypeName(getCurScope(), DeclaratorInfo);
71 /// Normalizes an attribute name by dropping prefixed and suffixed __.
72 static StringRef normalizeAttrName(StringRef Name) {
73 if (Name.size() >= 4 && Name.startswith("__") && Name.endswith("__"))
74 return Name.drop_front(2).drop_back(2);
78 /// isAttributeLateParsed - Return true if the attribute has arguments that
79 /// require late parsing.
80 static bool isAttributeLateParsed(const IdentifierInfo &II) {
81 #define CLANG_ATTR_LATE_PARSED_LIST
82 return llvm::StringSwitch<bool>(normalizeAttrName(II.getName()))
83 #include "clang/Parse/AttrParserStringSwitches.inc"
85 #undef CLANG_ATTR_LATE_PARSED_LIST
88 /// Check if the a start and end source location expand to the same macro.
89 static bool FindLocsWithCommonFileID(Preprocessor &PP, SourceLocation StartLoc,
90 SourceLocation EndLoc) {
91 if (!StartLoc.isMacroID() || !EndLoc.isMacroID())
94 SourceManager &SM = PP.getSourceManager();
95 if (SM.getFileID(StartLoc) != SM.getFileID(EndLoc))
98 bool AttrStartIsInMacro =
99 Lexer::isAtStartOfMacroExpansion(StartLoc, SM, PP.getLangOpts());
100 bool AttrEndIsInMacro =
101 Lexer::isAtEndOfMacroExpansion(EndLoc, SM, PP.getLangOpts());
102 return AttrStartIsInMacro && AttrEndIsInMacro;
105 /// ParseGNUAttributes - Parse a non-empty attributes list.
107 /// [GNU] attributes:
109 /// attributes attribute
112 /// '__attribute__' '(' '(' attribute-list ')' ')'
114 /// [GNU] attribute-list:
116 /// attribute_list ',' attrib
121 /// attrib-name '(' identifier ')'
122 /// attrib-name '(' identifier ',' nonempty-expr-list ')'
123 /// attrib-name '(' argument-expression-list [C99 6.5.2] ')'
125 /// [GNU] attrib-name:
131 /// Whether an attribute takes an 'identifier' is determined by the
132 /// attrib-name. GCC's behavior here is not worth imitating:
134 /// * In C mode, if the attribute argument list starts with an identifier
135 /// followed by a ',' or an ')', and the identifier doesn't resolve to
136 /// a type, it is parsed as an identifier. If the attribute actually
137 /// wanted an expression, it's out of luck (but it turns out that no
138 /// attributes work that way, because C constant expressions are very
140 /// * In C++ mode, if the attribute argument list starts with an identifier,
141 /// and the attribute *wants* an identifier, it is parsed as an identifier.
142 /// At block scope, any additional tokens between the identifier and the
143 /// ',' or ')' are ignored, otherwise they produce a parse error.
145 /// We follow the C++ model, but don't allow junk after the identifier.
146 void Parser::ParseGNUAttributes(ParsedAttributes &attrs,
147 SourceLocation *endLoc,
148 LateParsedAttrList *LateAttrs,
150 assert(Tok.is(tok::kw___attribute) && "Not a GNU attribute list!");
152 while (Tok.is(tok::kw___attribute)) {
153 SourceLocation AttrTokLoc = ConsumeToken();
154 unsigned OldNumAttrs = attrs.size();
155 unsigned OldNumLateAttrs = LateAttrs ? LateAttrs->size() : 0;
157 if (ExpectAndConsume(tok::l_paren, diag::err_expected_lparen_after,
159 SkipUntil(tok::r_paren, StopAtSemi); // skip until ) or ;
162 if (ExpectAndConsume(tok::l_paren, diag::err_expected_lparen_after, "(")) {
163 SkipUntil(tok::r_paren, StopAtSemi); // skip until ) or ;
166 // Parse the attribute-list. e.g. __attribute__(( weak, alias("__f") ))
168 // Eat preceeding commas to allow __attribute__((,,,foo))
169 while (TryConsumeToken(tok::comma))
172 // Expect an identifier or declaration specifier (const, int, etc.)
173 if (Tok.isAnnotation())
175 IdentifierInfo *AttrName = Tok.getIdentifierInfo();
179 SourceLocation AttrNameLoc = ConsumeToken();
181 if (Tok.isNot(tok::l_paren)) {
182 attrs.addNew(AttrName, AttrNameLoc, nullptr, AttrNameLoc, nullptr, 0,
187 // Handle "parameterized" attributes
188 if (!LateAttrs || !isAttributeLateParsed(*AttrName)) {
189 ParseGNUAttributeArgs(AttrName, AttrNameLoc, attrs, endLoc, nullptr,
190 SourceLocation(), ParsedAttr::AS_GNU, D);
194 // Handle attributes with arguments that require late parsing.
195 LateParsedAttribute *LA =
196 new LateParsedAttribute(this, *AttrName, AttrNameLoc);
197 LateAttrs->push_back(LA);
199 // Attributes in a class are parsed at the end of the class, along
200 // with other late-parsed declarations.
201 if (!ClassStack.empty() && !LateAttrs->parseSoon())
202 getCurrentClass().LateParsedDeclarations.push_back(LA);
204 // Be sure ConsumeAndStoreUntil doesn't see the start l_paren, since it
205 // recursively consumes balanced parens.
206 LA->Toks.push_back(Tok);
208 // Consume everything up to and including the matching right parens.
209 ConsumeAndStoreUntil(tok::r_paren, LA->Toks, /*StopAtSemi=*/true);
213 Eof.setLocation(Tok.getLocation());
214 LA->Toks.push_back(Eof);
215 } while (Tok.is(tok::comma));
217 if (ExpectAndConsume(tok::r_paren))
218 SkipUntil(tok::r_paren, StopAtSemi);
219 SourceLocation Loc = Tok.getLocation();
220 if (ExpectAndConsume(tok::r_paren))
221 SkipUntil(tok::r_paren, StopAtSemi);
225 // If this was declared in a macro, attach the macro IdentifierInfo to the
227 auto &SM = PP.getSourceManager();
228 if (!SM.isWrittenInBuiltinFile(SM.getSpellingLoc(AttrTokLoc)) &&
229 FindLocsWithCommonFileID(PP, AttrTokLoc, Loc)) {
230 CharSourceRange ExpansionRange = SM.getExpansionRange(AttrTokLoc);
231 StringRef FoundName =
232 Lexer::getSourceText(ExpansionRange, SM, PP.getLangOpts());
233 IdentifierInfo *MacroII = PP.getIdentifierInfo(FoundName);
235 for (unsigned i = OldNumAttrs; i < attrs.size(); ++i)
236 attrs[i].setMacroIdentifier(MacroII, ExpansionRange.getBegin());
239 for (unsigned i = OldNumLateAttrs; i < LateAttrs->size(); ++i)
240 (*LateAttrs)[i]->MacroII = MacroII;
246 /// Determine whether the given attribute has an identifier argument.
247 static bool attributeHasIdentifierArg(const IdentifierInfo &II) {
248 #define CLANG_ATTR_IDENTIFIER_ARG_LIST
249 return llvm::StringSwitch<bool>(normalizeAttrName(II.getName()))
250 #include "clang/Parse/AttrParserStringSwitches.inc"
252 #undef CLANG_ATTR_IDENTIFIER_ARG_LIST
255 /// Determine whether the given attribute has a variadic identifier argument.
256 static bool attributeHasVariadicIdentifierArg(const IdentifierInfo &II) {
257 #define CLANG_ATTR_VARIADIC_IDENTIFIER_ARG_LIST
258 return llvm::StringSwitch<bool>(normalizeAttrName(II.getName()))
259 #include "clang/Parse/AttrParserStringSwitches.inc"
261 #undef CLANG_ATTR_VARIADIC_IDENTIFIER_ARG_LIST
264 /// Determine whether the given attribute treats kw_this as an identifier.
265 static bool attributeTreatsKeywordThisAsIdentifier(const IdentifierInfo &II) {
266 #define CLANG_ATTR_THIS_ISA_IDENTIFIER_ARG_LIST
267 return llvm::StringSwitch<bool>(normalizeAttrName(II.getName()))
268 #include "clang/Parse/AttrParserStringSwitches.inc"
270 #undef CLANG_ATTR_THIS_ISA_IDENTIFIER_ARG_LIST
273 /// Determine whether the given attribute parses a type argument.
274 static bool attributeIsTypeArgAttr(const IdentifierInfo &II) {
275 #define CLANG_ATTR_TYPE_ARG_LIST
276 return llvm::StringSwitch<bool>(normalizeAttrName(II.getName()))
277 #include "clang/Parse/AttrParserStringSwitches.inc"
279 #undef CLANG_ATTR_TYPE_ARG_LIST
282 /// Determine whether the given attribute requires parsing its arguments
283 /// in an unevaluated context or not.
284 static bool attributeParsedArgsUnevaluated(const IdentifierInfo &II) {
285 #define CLANG_ATTR_ARG_CONTEXT_LIST
286 return llvm::StringSwitch<bool>(normalizeAttrName(II.getName()))
287 #include "clang/Parse/AttrParserStringSwitches.inc"
289 #undef CLANG_ATTR_ARG_CONTEXT_LIST
292 IdentifierLoc *Parser::ParseIdentifierLoc() {
293 assert(Tok.is(tok::identifier) && "expected an identifier");
294 IdentifierLoc *IL = IdentifierLoc::create(Actions.Context,
296 Tok.getIdentifierInfo());
301 void Parser::ParseAttributeWithTypeArg(IdentifierInfo &AttrName,
302 SourceLocation AttrNameLoc,
303 ParsedAttributes &Attrs,
304 SourceLocation *EndLoc,
305 IdentifierInfo *ScopeName,
306 SourceLocation ScopeLoc,
307 ParsedAttr::Syntax Syntax) {
308 BalancedDelimiterTracker Parens(*this, tok::l_paren);
309 Parens.consumeOpen();
312 if (Tok.isNot(tok::r_paren))
315 if (Parens.consumeClose())
322 Attrs.addNewTypeAttr(&AttrName,
323 SourceRange(AttrNameLoc, Parens.getCloseLocation()),
324 ScopeName, ScopeLoc, T.get(), Syntax);
326 Attrs.addNew(&AttrName, SourceRange(AttrNameLoc, Parens.getCloseLocation()),
327 ScopeName, ScopeLoc, nullptr, 0, Syntax);
330 unsigned Parser::ParseAttributeArgsCommon(
331 IdentifierInfo *AttrName, SourceLocation AttrNameLoc,
332 ParsedAttributes &Attrs, SourceLocation *EndLoc, IdentifierInfo *ScopeName,
333 SourceLocation ScopeLoc, ParsedAttr::Syntax Syntax) {
334 // Ignore the left paren location for now.
337 bool ChangeKWThisToIdent = attributeTreatsKeywordThisAsIdentifier(*AttrName);
338 bool AttributeIsTypeArgAttr = attributeIsTypeArgAttr(*AttrName);
340 // Interpret "kw_this" as an identifier if the attributed requests it.
341 if (ChangeKWThisToIdent && Tok.is(tok::kw_this))
342 Tok.setKind(tok::identifier);
345 if (Tok.is(tok::identifier)) {
346 // If this attribute wants an 'identifier' argument, make it so.
347 bool IsIdentifierArg = attributeHasIdentifierArg(*AttrName) ||
348 attributeHasVariadicIdentifierArg(*AttrName);
349 ParsedAttr::Kind AttrKind =
350 ParsedAttr::getParsedKind(AttrName, ScopeName, Syntax);
352 // If we don't know how to parse this attribute, but this is the only
353 // token in this argument, assume it's meant to be an identifier.
354 if (AttrKind == ParsedAttr::UnknownAttribute ||
355 AttrKind == ParsedAttr::IgnoredAttribute) {
356 const Token &Next = NextToken();
357 IsIdentifierArg = Next.isOneOf(tok::r_paren, tok::comma);
361 ArgExprs.push_back(ParseIdentifierLoc());
364 ParsedType TheParsedType;
365 if (!ArgExprs.empty() ? Tok.is(tok::comma) : Tok.isNot(tok::r_paren)) {
367 if (!ArgExprs.empty())
370 // Parse the non-empty comma-separated list of expressions.
372 // Interpret "kw_this" as an identifier if the attributed requests it.
373 if (ChangeKWThisToIdent && Tok.is(tok::kw_this))
374 Tok.setKind(tok::identifier);
377 if (AttributeIsTypeArgAttr) {
378 TypeResult T = ParseTypeName();
380 SkipUntil(tok::r_paren, StopAtSemi);
384 TheParsedType = T.get();
385 break; // FIXME: Multiple type arguments are not implemented.
386 } else if (Tok.is(tok::identifier) &&
387 attributeHasVariadicIdentifierArg(*AttrName)) {
388 ArgExprs.push_back(ParseIdentifierLoc());
390 bool Uneval = attributeParsedArgsUnevaluated(*AttrName);
391 EnterExpressionEvaluationContext Unevaluated(
393 Uneval ? Sema::ExpressionEvaluationContext::Unevaluated
394 : Sema::ExpressionEvaluationContext::ConstantEvaluated);
397 Actions.CorrectDelayedTyposInExpr(ParseAssignmentExpression()));
398 if (ArgExpr.isInvalid()) {
399 SkipUntil(tok::r_paren, StopAtSemi);
402 ArgExprs.push_back(ArgExpr.get());
404 // Eat the comma, move to the next argument
405 } while (TryConsumeToken(tok::comma));
408 SourceLocation RParen = Tok.getLocation();
409 if (!ExpectAndConsume(tok::r_paren)) {
410 SourceLocation AttrLoc = ScopeLoc.isValid() ? ScopeLoc : AttrNameLoc;
412 if (AttributeIsTypeArgAttr && !TheParsedType.get().isNull()) {
413 Attrs.addNewTypeAttr(AttrName, SourceRange(AttrNameLoc, RParen),
414 ScopeName, ScopeLoc, TheParsedType, Syntax);
416 Attrs.addNew(AttrName, SourceRange(AttrLoc, RParen), ScopeName, ScopeLoc,
417 ArgExprs.data(), ArgExprs.size(), Syntax);
424 return static_cast<unsigned>(ArgExprs.size() + !TheParsedType.get().isNull());
427 /// Parse the arguments to a parameterized GNU attribute or
428 /// a C++11 attribute in "gnu" namespace.
429 void Parser::ParseGNUAttributeArgs(IdentifierInfo *AttrName,
430 SourceLocation AttrNameLoc,
431 ParsedAttributes &Attrs,
432 SourceLocation *EndLoc,
433 IdentifierInfo *ScopeName,
434 SourceLocation ScopeLoc,
435 ParsedAttr::Syntax Syntax,
438 assert(Tok.is(tok::l_paren) && "Attribute arg list not starting with '('");
440 ParsedAttr::Kind AttrKind =
441 ParsedAttr::getParsedKind(AttrName, ScopeName, Syntax);
443 if (AttrKind == ParsedAttr::AT_Availability) {
444 ParseAvailabilityAttribute(*AttrName, AttrNameLoc, Attrs, EndLoc, ScopeName,
447 } else if (AttrKind == ParsedAttr::AT_ExternalSourceSymbol) {
448 ParseExternalSourceSymbolAttribute(*AttrName, AttrNameLoc, Attrs, EndLoc,
449 ScopeName, ScopeLoc, Syntax);
451 } else if (AttrKind == ParsedAttr::AT_ObjCBridgeRelated) {
452 ParseObjCBridgeRelatedAttribute(*AttrName, AttrNameLoc, Attrs, EndLoc,
453 ScopeName, ScopeLoc, Syntax);
455 } else if (AttrKind == ParsedAttr::AT_TypeTagForDatatype) {
456 ParseTypeTagForDatatypeAttribute(*AttrName, AttrNameLoc, Attrs, EndLoc,
457 ScopeName, ScopeLoc, Syntax);
459 } else if (attributeIsTypeArgAttr(*AttrName)) {
460 ParseAttributeWithTypeArg(*AttrName, AttrNameLoc, Attrs, EndLoc, ScopeName,
465 // These may refer to the function arguments, but need to be parsed early to
466 // participate in determining whether it's a redeclaration.
467 llvm::Optional<ParseScope> PrototypeScope;
468 if (normalizeAttrName(AttrName->getName()) == "enable_if" &&
469 D && D->isFunctionDeclarator()) {
470 DeclaratorChunk::FunctionTypeInfo FTI = D->getFunctionTypeInfo();
471 PrototypeScope.emplace(this, Scope::FunctionPrototypeScope |
472 Scope::FunctionDeclarationScope |
474 for (unsigned i = 0; i != FTI.NumParams; ++i) {
475 ParmVarDecl *Param = cast<ParmVarDecl>(FTI.Params[i].Param);
476 Actions.ActOnReenterCXXMethodParameter(getCurScope(), Param);
480 ParseAttributeArgsCommon(AttrName, AttrNameLoc, Attrs, EndLoc, ScopeName,
484 unsigned Parser::ParseClangAttributeArgs(
485 IdentifierInfo *AttrName, SourceLocation AttrNameLoc,
486 ParsedAttributes &Attrs, SourceLocation *EndLoc, IdentifierInfo *ScopeName,
487 SourceLocation ScopeLoc, ParsedAttr::Syntax Syntax) {
488 assert(Tok.is(tok::l_paren) && "Attribute arg list not starting with '('");
490 ParsedAttr::Kind AttrKind =
491 ParsedAttr::getParsedKind(AttrName, ScopeName, Syntax);
495 return ParseAttributeArgsCommon(AttrName, AttrNameLoc, Attrs, EndLoc,
496 ScopeName, ScopeLoc, Syntax);
497 case ParsedAttr::AT_ExternalSourceSymbol:
498 ParseExternalSourceSymbolAttribute(*AttrName, AttrNameLoc, Attrs, EndLoc,
499 ScopeName, ScopeLoc, Syntax);
501 case ParsedAttr::AT_Availability:
502 ParseAvailabilityAttribute(*AttrName, AttrNameLoc, Attrs, EndLoc, ScopeName,
505 case ParsedAttr::AT_ObjCBridgeRelated:
506 ParseObjCBridgeRelatedAttribute(*AttrName, AttrNameLoc, Attrs, EndLoc,
507 ScopeName, ScopeLoc, Syntax);
509 case ParsedAttr::AT_TypeTagForDatatype:
510 ParseTypeTagForDatatypeAttribute(*AttrName, AttrNameLoc, Attrs, EndLoc,
511 ScopeName, ScopeLoc, Syntax);
514 return !Attrs.empty() ? Attrs.begin()->getNumArgs() : 0;
517 bool Parser::ParseMicrosoftDeclSpecArgs(IdentifierInfo *AttrName,
518 SourceLocation AttrNameLoc,
519 ParsedAttributes &Attrs) {
520 // If the attribute isn't known, we will not attempt to parse any
522 if (!hasAttribute(AttrSyntax::Declspec, nullptr, AttrName,
523 getTargetInfo(), getLangOpts())) {
524 // Eat the left paren, then skip to the ending right paren.
526 SkipUntil(tok::r_paren);
530 SourceLocation OpenParenLoc = Tok.getLocation();
532 if (AttrName->getName() == "property") {
533 // The property declspec is more complex in that it can take one or two
534 // assignment expressions as a parameter, but the lhs of the assignment
535 // must be named get or put.
537 BalancedDelimiterTracker T(*this, tok::l_paren);
538 T.expectAndConsume(diag::err_expected_lparen_after,
539 AttrName->getNameStart(), tok::r_paren);
544 AK_Get = 1 // indices into AccessorNames
546 IdentifierInfo *AccessorNames[] = {nullptr, nullptr};
547 bool HasInvalidAccessor = false;
549 // Parse the accessor specifications.
551 // Stop if this doesn't look like an accessor spec.
552 if (!Tok.is(tok::identifier)) {
553 // If the user wrote a completely empty list, use a special diagnostic.
554 if (Tok.is(tok::r_paren) && !HasInvalidAccessor &&
555 AccessorNames[AK_Put] == nullptr &&
556 AccessorNames[AK_Get] == nullptr) {
557 Diag(AttrNameLoc, diag::err_ms_property_no_getter_or_putter);
561 Diag(Tok.getLocation(), diag::err_ms_property_unknown_accessor);
566 SourceLocation KindLoc = Tok.getLocation();
567 StringRef KindStr = Tok.getIdentifierInfo()->getName();
568 if (KindStr == "get") {
570 } else if (KindStr == "put") {
573 // Recover from the common mistake of using 'set' instead of 'put'.
574 } else if (KindStr == "set") {
575 Diag(KindLoc, diag::err_ms_property_has_set_accessor)
576 << FixItHint::CreateReplacement(KindLoc, "put");
579 // Handle the mistake of forgetting the accessor kind by skipping
581 } else if (NextToken().is(tok::comma) || NextToken().is(tok::r_paren)) {
582 Diag(KindLoc, diag::err_ms_property_missing_accessor_kind);
584 HasInvalidAccessor = true;
585 goto next_property_accessor;
587 // Otherwise, complain about the unknown accessor kind.
589 Diag(KindLoc, diag::err_ms_property_unknown_accessor);
590 HasInvalidAccessor = true;
593 // Try to keep parsing unless it doesn't look like an accessor spec.
594 if (!NextToken().is(tok::equal))
598 // Consume the identifier.
602 if (!TryConsumeToken(tok::equal)) {
603 Diag(Tok.getLocation(), diag::err_ms_property_expected_equal)
608 // Expect the method name.
609 if (!Tok.is(tok::identifier)) {
610 Diag(Tok.getLocation(), diag::err_ms_property_expected_accessor_name);
614 if (Kind == AK_Invalid) {
615 // Just drop invalid accessors.
616 } else if (AccessorNames[Kind] != nullptr) {
617 // Complain about the repeated accessor, ignore it, and keep parsing.
618 Diag(KindLoc, diag::err_ms_property_duplicate_accessor) << KindStr;
620 AccessorNames[Kind] = Tok.getIdentifierInfo();
624 next_property_accessor:
625 // Keep processing accessors until we run out.
626 if (TryConsumeToken(tok::comma))
629 // If we run into the ')', stop without consuming it.
630 if (Tok.is(tok::r_paren))
633 Diag(Tok.getLocation(), diag::err_ms_property_expected_comma_or_rparen);
637 // Only add the property attribute if it was well-formed.
638 if (!HasInvalidAccessor)
639 Attrs.addNewPropertyAttr(AttrName, AttrNameLoc, nullptr, SourceLocation(),
640 AccessorNames[AK_Get], AccessorNames[AK_Put],
641 ParsedAttr::AS_Declspec);
643 return !HasInvalidAccessor;
647 ParseAttributeArgsCommon(AttrName, AttrNameLoc, Attrs, nullptr, nullptr,
648 SourceLocation(), ParsedAttr::AS_Declspec);
650 // If this attribute's args were parsed, and it was expected to have
651 // arguments but none were provided, emit a diagnostic.
652 if (!Attrs.empty() && Attrs.begin()->getMaxArgs() && !NumArgs) {
653 Diag(OpenParenLoc, diag::err_attribute_requires_arguments) << AttrName;
659 /// [MS] decl-specifier:
660 /// __declspec ( extended-decl-modifier-seq )
662 /// [MS] extended-decl-modifier-seq:
663 /// extended-decl-modifier[opt]
664 /// extended-decl-modifier extended-decl-modifier-seq
665 void Parser::ParseMicrosoftDeclSpecs(ParsedAttributes &Attrs,
666 SourceLocation *End) {
667 assert(getLangOpts().DeclSpecKeyword && "__declspec keyword is not enabled");
668 assert(Tok.is(tok::kw___declspec) && "Not a declspec!");
670 while (Tok.is(tok::kw___declspec)) {
672 BalancedDelimiterTracker T(*this, tok::l_paren);
673 if (T.expectAndConsume(diag::err_expected_lparen_after, "__declspec",
677 // An empty declspec is perfectly legal and should not warn. Additionally,
678 // you can specify multiple attributes per declspec.
679 while (Tok.isNot(tok::r_paren)) {
680 // Attribute not present.
681 if (TryConsumeToken(tok::comma))
684 // We expect either a well-known identifier or a generic string. Anything
685 // else is a malformed declspec.
686 bool IsString = Tok.getKind() == tok::string_literal;
687 if (!IsString && Tok.getKind() != tok::identifier &&
688 Tok.getKind() != tok::kw_restrict) {
689 Diag(Tok, diag::err_ms_declspec_type);
694 IdentifierInfo *AttrName;
695 SourceLocation AttrNameLoc;
697 SmallString<8> StrBuffer;
698 bool Invalid = false;
699 StringRef Str = PP.getSpelling(Tok, StrBuffer, &Invalid);
704 AttrName = PP.getIdentifierInfo(Str);
705 AttrNameLoc = ConsumeStringToken();
707 AttrName = Tok.getIdentifierInfo();
708 AttrNameLoc = ConsumeToken();
711 bool AttrHandled = false;
713 // Parse attribute arguments.
714 if (Tok.is(tok::l_paren))
715 AttrHandled = ParseMicrosoftDeclSpecArgs(AttrName, AttrNameLoc, Attrs);
716 else if (AttrName->getName() == "property")
717 // The property attribute must have an argument list.
718 Diag(Tok.getLocation(), diag::err_expected_lparen_after)
719 << AttrName->getName();
722 Attrs.addNew(AttrName, AttrNameLoc, nullptr, AttrNameLoc, nullptr, 0,
723 ParsedAttr::AS_Declspec);
727 *End = T.getCloseLocation();
731 void Parser::ParseMicrosoftTypeAttributes(ParsedAttributes &attrs) {
732 // Treat these like attributes
734 switch (Tok.getKind()) {
735 case tok::kw___fastcall:
736 case tok::kw___stdcall:
737 case tok::kw___thiscall:
738 case tok::kw___regcall:
739 case tok::kw___cdecl:
740 case tok::kw___vectorcall:
741 case tok::kw___ptr64:
743 case tok::kw___ptr32:
745 case tok::kw___uptr: {
746 IdentifierInfo *AttrName = Tok.getIdentifierInfo();
747 SourceLocation AttrNameLoc = ConsumeToken();
748 attrs.addNew(AttrName, AttrNameLoc, nullptr, AttrNameLoc, nullptr, 0,
749 ParsedAttr::AS_Keyword);
758 void Parser::DiagnoseAndSkipExtendedMicrosoftTypeAttributes() {
759 SourceLocation StartLoc = Tok.getLocation();
760 SourceLocation EndLoc = SkipExtendedMicrosoftTypeAttributes();
762 if (EndLoc.isValid()) {
763 SourceRange Range(StartLoc, EndLoc);
764 Diag(StartLoc, diag::warn_microsoft_qualifiers_ignored) << Range;
768 SourceLocation Parser::SkipExtendedMicrosoftTypeAttributes() {
769 SourceLocation EndLoc;
772 switch (Tok.getKind()) {
774 case tok::kw_volatile:
775 case tok::kw___fastcall:
776 case tok::kw___stdcall:
777 case tok::kw___thiscall:
778 case tok::kw___cdecl:
779 case tok::kw___vectorcall:
780 case tok::kw___ptr32:
781 case tok::kw___ptr64:
783 case tok::kw___unaligned:
786 EndLoc = ConsumeToken();
794 void Parser::ParseBorlandTypeAttributes(ParsedAttributes &attrs) {
795 // Treat these like attributes
796 while (Tok.is(tok::kw___pascal)) {
797 IdentifierInfo *AttrName = Tok.getIdentifierInfo();
798 SourceLocation AttrNameLoc = ConsumeToken();
799 attrs.addNew(AttrName, AttrNameLoc, nullptr, AttrNameLoc, nullptr, 0,
800 ParsedAttr::AS_Keyword);
804 void Parser::ParseOpenCLKernelAttributes(ParsedAttributes &attrs) {
805 // Treat these like attributes
806 while (Tok.is(tok::kw___kernel)) {
807 IdentifierInfo *AttrName = Tok.getIdentifierInfo();
808 SourceLocation AttrNameLoc = ConsumeToken();
809 attrs.addNew(AttrName, AttrNameLoc, nullptr, AttrNameLoc, nullptr, 0,
810 ParsedAttr::AS_Keyword);
814 void Parser::ParseOpenCLQualifiers(ParsedAttributes &Attrs) {
815 IdentifierInfo *AttrName = Tok.getIdentifierInfo();
816 SourceLocation AttrNameLoc = Tok.getLocation();
817 Attrs.addNew(AttrName, AttrNameLoc, nullptr, AttrNameLoc, nullptr, 0,
818 ParsedAttr::AS_Keyword);
821 void Parser::ParseNullabilityTypeSpecifiers(ParsedAttributes &attrs) {
822 // Treat these like attributes, even though they're type specifiers.
824 switch (Tok.getKind()) {
825 case tok::kw__Nonnull:
826 case tok::kw__Nullable:
827 case tok::kw__Null_unspecified: {
828 IdentifierInfo *AttrName = Tok.getIdentifierInfo();
829 SourceLocation AttrNameLoc = ConsumeToken();
830 if (!getLangOpts().ObjC)
831 Diag(AttrNameLoc, diag::ext_nullability)
833 attrs.addNew(AttrName, AttrNameLoc, nullptr, AttrNameLoc, nullptr, 0,
834 ParsedAttr::AS_Keyword);
843 static bool VersionNumberSeparator(const char Separator) {
844 return (Separator == '.' || Separator == '_');
847 /// Parse a version number.
851 /// simple-integer '.' simple-integer
852 /// simple-integer '_' simple-integer
853 /// simple-integer '.' simple-integer '.' simple-integer
854 /// simple-integer '_' simple-integer '_' simple-integer
855 VersionTuple Parser::ParseVersionTuple(SourceRange &Range) {
856 Range = SourceRange(Tok.getLocation(), Tok.getEndLoc());
858 if (!Tok.is(tok::numeric_constant)) {
859 Diag(Tok, diag::err_expected_version);
860 SkipUntil(tok::comma, tok::r_paren,
861 StopAtSemi | StopBeforeMatch | StopAtCodeCompletion);
862 return VersionTuple();
865 // Parse the major (and possibly minor and subminor) versions, which
866 // are stored in the numeric constant. We utilize a quirk of the
867 // lexer, which is that it handles something like 1.2.3 as a single
868 // numeric constant, rather than two separate tokens.
869 SmallString<512> Buffer;
870 Buffer.resize(Tok.getLength()+1);
871 const char *ThisTokBegin = &Buffer[0];
873 // Get the spelling of the token, which eliminates trigraphs, etc.
874 bool Invalid = false;
875 unsigned ActualLength = PP.getSpelling(Tok, ThisTokBegin, &Invalid);
877 return VersionTuple();
879 // Parse the major version.
880 unsigned AfterMajor = 0;
882 while (AfterMajor < ActualLength && isDigit(ThisTokBegin[AfterMajor])) {
883 Major = Major * 10 + ThisTokBegin[AfterMajor] - '0';
887 if (AfterMajor == 0) {
888 Diag(Tok, diag::err_expected_version);
889 SkipUntil(tok::comma, tok::r_paren,
890 StopAtSemi | StopBeforeMatch | StopAtCodeCompletion);
891 return VersionTuple();
894 if (AfterMajor == ActualLength) {
897 // We only had a single version component.
899 Diag(Tok, diag::err_zero_version);
900 return VersionTuple();
903 return VersionTuple(Major);
906 const char AfterMajorSeparator = ThisTokBegin[AfterMajor];
907 if (!VersionNumberSeparator(AfterMajorSeparator)
908 || (AfterMajor + 1 == ActualLength)) {
909 Diag(Tok, diag::err_expected_version);
910 SkipUntil(tok::comma, tok::r_paren,
911 StopAtSemi | StopBeforeMatch | StopAtCodeCompletion);
912 return VersionTuple();
915 // Parse the minor version.
916 unsigned AfterMinor = AfterMajor + 1;
918 while (AfterMinor < ActualLength && isDigit(ThisTokBegin[AfterMinor])) {
919 Minor = Minor * 10 + ThisTokBegin[AfterMinor] - '0';
923 if (AfterMinor == ActualLength) {
926 // We had major.minor.
927 if (Major == 0 && Minor == 0) {
928 Diag(Tok, diag::err_zero_version);
929 return VersionTuple();
932 return VersionTuple(Major, Minor);
935 const char AfterMinorSeparator = ThisTokBegin[AfterMinor];
936 // If what follows is not a '.' or '_', we have a problem.
937 if (!VersionNumberSeparator(AfterMinorSeparator)) {
938 Diag(Tok, diag::err_expected_version);
939 SkipUntil(tok::comma, tok::r_paren,
940 StopAtSemi | StopBeforeMatch | StopAtCodeCompletion);
941 return VersionTuple();
944 // Warn if separators, be it '.' or '_', do not match.
945 if (AfterMajorSeparator != AfterMinorSeparator)
946 Diag(Tok, diag::warn_expected_consistent_version_separator);
948 // Parse the subminor version.
949 unsigned AfterSubminor = AfterMinor + 1;
950 unsigned Subminor = 0;
951 while (AfterSubminor < ActualLength && isDigit(ThisTokBegin[AfterSubminor])) {
952 Subminor = Subminor * 10 + ThisTokBegin[AfterSubminor] - '0';
956 if (AfterSubminor != ActualLength) {
957 Diag(Tok, diag::err_expected_version);
958 SkipUntil(tok::comma, tok::r_paren,
959 StopAtSemi | StopBeforeMatch | StopAtCodeCompletion);
960 return VersionTuple();
963 return VersionTuple(Major, Minor, Subminor);
966 /// Parse the contents of the "availability" attribute.
968 /// availability-attribute:
969 /// 'availability' '(' platform ',' opt-strict version-arg-list,
970 /// opt-replacement, opt-message')'
978 /// version-arg-list:
980 /// version-arg ',' version-arg-list
983 /// 'introduced' '=' version
984 /// 'deprecated' '=' version
985 /// 'obsoleted' = version
988 /// 'replacement' '=' <string>
990 /// 'message' '=' <string>
991 void Parser::ParseAvailabilityAttribute(IdentifierInfo &Availability,
992 SourceLocation AvailabilityLoc,
993 ParsedAttributes &attrs,
994 SourceLocation *endLoc,
995 IdentifierInfo *ScopeName,
996 SourceLocation ScopeLoc,
997 ParsedAttr::Syntax Syntax) {
998 enum { Introduced, Deprecated, Obsoleted, Unknown };
999 AvailabilityChange Changes[Unknown];
1000 ExprResult MessageExpr, ReplacementExpr;
1003 BalancedDelimiterTracker T(*this, tok::l_paren);
1004 if (T.consumeOpen()) {
1005 Diag(Tok, diag::err_expected) << tok::l_paren;
1009 // Parse the platform name.
1010 if (Tok.isNot(tok::identifier)) {
1011 Diag(Tok, diag::err_availability_expected_platform);
1012 SkipUntil(tok::r_paren, StopAtSemi);
1015 IdentifierLoc *Platform = ParseIdentifierLoc();
1016 if (const IdentifierInfo *const Ident = Platform->Ident) {
1017 // Canonicalize platform name from "macosx" to "macos".
1018 if (Ident->getName() == "macosx")
1019 Platform->Ident = PP.getIdentifierInfo("macos");
1020 // Canonicalize platform name from "macosx_app_extension" to
1021 // "macos_app_extension".
1022 else if (Ident->getName() == "macosx_app_extension")
1023 Platform->Ident = PP.getIdentifierInfo("macos_app_extension");
1025 Platform->Ident = PP.getIdentifierInfo(
1026 AvailabilityAttr::canonicalizePlatformName(Ident->getName()));
1029 // Parse the ',' following the platform name.
1030 if (ExpectAndConsume(tok::comma)) {
1031 SkipUntil(tok::r_paren, StopAtSemi);
1035 // If we haven't grabbed the pointers for the identifiers
1036 // "introduced", "deprecated", and "obsoleted", do so now.
1037 if (!Ident_introduced) {
1038 Ident_introduced = PP.getIdentifierInfo("introduced");
1039 Ident_deprecated = PP.getIdentifierInfo("deprecated");
1040 Ident_obsoleted = PP.getIdentifierInfo("obsoleted");
1041 Ident_unavailable = PP.getIdentifierInfo("unavailable");
1042 Ident_message = PP.getIdentifierInfo("message");
1043 Ident_strict = PP.getIdentifierInfo("strict");
1044 Ident_replacement = PP.getIdentifierInfo("replacement");
1047 // Parse the optional "strict", the optional "replacement" and the set of
1048 // introductions/deprecations/removals.
1049 SourceLocation UnavailableLoc, StrictLoc;
1051 if (Tok.isNot(tok::identifier)) {
1052 Diag(Tok, diag::err_availability_expected_change);
1053 SkipUntil(tok::r_paren, StopAtSemi);
1056 IdentifierInfo *Keyword = Tok.getIdentifierInfo();
1057 SourceLocation KeywordLoc = ConsumeToken();
1059 if (Keyword == Ident_strict) {
1060 if (StrictLoc.isValid()) {
1061 Diag(KeywordLoc, diag::err_availability_redundant)
1062 << Keyword << SourceRange(StrictLoc);
1064 StrictLoc = KeywordLoc;
1068 if (Keyword == Ident_unavailable) {
1069 if (UnavailableLoc.isValid()) {
1070 Diag(KeywordLoc, diag::err_availability_redundant)
1071 << Keyword << SourceRange(UnavailableLoc);
1073 UnavailableLoc = KeywordLoc;
1077 if (Keyword == Ident_deprecated && Platform->Ident &&
1078 Platform->Ident->isStr("swift")) {
1079 // For swift, we deprecate for all versions.
1080 if (Changes[Deprecated].KeywordLoc.isValid()) {
1081 Diag(KeywordLoc, diag::err_availability_redundant)
1083 << SourceRange(Changes[Deprecated].KeywordLoc);
1086 Changes[Deprecated].KeywordLoc = KeywordLoc;
1087 // Use a fake version here.
1088 Changes[Deprecated].Version = VersionTuple(1);
1092 if (Tok.isNot(tok::equal)) {
1093 Diag(Tok, diag::err_expected_after) << Keyword << tok::equal;
1094 SkipUntil(tok::r_paren, StopAtSemi);
1098 if (Keyword == Ident_message || Keyword == Ident_replacement) {
1099 if (Tok.isNot(tok::string_literal)) {
1100 Diag(Tok, diag::err_expected_string_literal)
1101 << /*Source='availability attribute'*/2;
1102 SkipUntil(tok::r_paren, StopAtSemi);
1105 if (Keyword == Ident_message)
1106 MessageExpr = ParseStringLiteralExpression();
1108 ReplacementExpr = ParseStringLiteralExpression();
1109 // Also reject wide string literals.
1110 if (StringLiteral *MessageStringLiteral =
1111 cast_or_null<StringLiteral>(MessageExpr.get())) {
1112 if (MessageStringLiteral->getCharByteWidth() != 1) {
1113 Diag(MessageStringLiteral->getSourceRange().getBegin(),
1114 diag::err_expected_string_literal)
1115 << /*Source='availability attribute'*/ 2;
1116 SkipUntil(tok::r_paren, StopAtSemi);
1120 if (Keyword == Ident_message)
1126 // Special handling of 'NA' only when applied to introduced or
1128 if ((Keyword == Ident_introduced || Keyword == Ident_deprecated) &&
1129 Tok.is(tok::identifier)) {
1130 IdentifierInfo *NA = Tok.getIdentifierInfo();
1131 if (NA->getName() == "NA") {
1133 if (Keyword == Ident_introduced)
1134 UnavailableLoc = KeywordLoc;
1139 SourceRange VersionRange;
1140 VersionTuple Version = ParseVersionTuple(VersionRange);
1142 if (Version.empty()) {
1143 SkipUntil(tok::r_paren, StopAtSemi);
1148 if (Keyword == Ident_introduced)
1150 else if (Keyword == Ident_deprecated)
1152 else if (Keyword == Ident_obsoleted)
1157 if (Index < Unknown) {
1158 if (!Changes[Index].KeywordLoc.isInvalid()) {
1159 Diag(KeywordLoc, diag::err_availability_redundant)
1161 << SourceRange(Changes[Index].KeywordLoc,
1162 Changes[Index].VersionRange.getEnd());
1165 Changes[Index].KeywordLoc = KeywordLoc;
1166 Changes[Index].Version = Version;
1167 Changes[Index].VersionRange = VersionRange;
1169 Diag(KeywordLoc, diag::err_availability_unknown_change)
1170 << Keyword << VersionRange;
1173 } while (TryConsumeToken(tok::comma));
1176 if (T.consumeClose())
1180 *endLoc = T.getCloseLocation();
1182 // The 'unavailable' availability cannot be combined with any other
1183 // availability changes. Make sure that hasn't happened.
1184 if (UnavailableLoc.isValid()) {
1185 bool Complained = false;
1186 for (unsigned Index = Introduced; Index != Unknown; ++Index) {
1187 if (Changes[Index].KeywordLoc.isValid()) {
1189 Diag(UnavailableLoc, diag::warn_availability_and_unavailable)
1190 << SourceRange(Changes[Index].KeywordLoc,
1191 Changes[Index].VersionRange.getEnd());
1195 // Clear out the availability.
1196 Changes[Index] = AvailabilityChange();
1201 // Record this attribute
1202 attrs.addNew(&Availability,
1203 SourceRange(AvailabilityLoc, T.getCloseLocation()),
1204 ScopeName, ScopeLoc,
1206 Changes[Introduced],
1207 Changes[Deprecated],
1209 UnavailableLoc, MessageExpr.get(),
1210 Syntax, StrictLoc, ReplacementExpr.get());
1213 /// Parse the contents of the "external_source_symbol" attribute.
1215 /// external-source-symbol-attribute:
1216 /// 'external_source_symbol' '(' keyword-arg-list ')'
1218 /// keyword-arg-list:
1220 /// keyword-arg ',' keyword-arg-list
1223 /// 'language' '=' <string>
1224 /// 'defined_in' '=' <string>
1225 /// 'generated_declaration'
1226 void Parser::ParseExternalSourceSymbolAttribute(
1227 IdentifierInfo &ExternalSourceSymbol, SourceLocation Loc,
1228 ParsedAttributes &Attrs, SourceLocation *EndLoc, IdentifierInfo *ScopeName,
1229 SourceLocation ScopeLoc, ParsedAttr::Syntax Syntax) {
1231 BalancedDelimiterTracker T(*this, tok::l_paren);
1232 if (T.expectAndConsume())
1235 // Initialize the pointers for the keyword identifiers when required.
1236 if (!Ident_language) {
1237 Ident_language = PP.getIdentifierInfo("language");
1238 Ident_defined_in = PP.getIdentifierInfo("defined_in");
1239 Ident_generated_declaration = PP.getIdentifierInfo("generated_declaration");
1242 ExprResult Language;
1243 bool HasLanguage = false;
1244 ExprResult DefinedInExpr;
1245 bool HasDefinedIn = false;
1246 IdentifierLoc *GeneratedDeclaration = nullptr;
1248 // Parse the language/defined_in/generated_declaration keywords
1250 if (Tok.isNot(tok::identifier)) {
1251 Diag(Tok, diag::err_external_source_symbol_expected_keyword);
1252 SkipUntil(tok::r_paren, StopAtSemi);
1256 SourceLocation KeywordLoc = Tok.getLocation();
1257 IdentifierInfo *Keyword = Tok.getIdentifierInfo();
1258 if (Keyword == Ident_generated_declaration) {
1259 if (GeneratedDeclaration) {
1260 Diag(Tok, diag::err_external_source_symbol_duplicate_clause) << Keyword;
1261 SkipUntil(tok::r_paren, StopAtSemi);
1264 GeneratedDeclaration = ParseIdentifierLoc();
1268 if (Keyword != Ident_language && Keyword != Ident_defined_in) {
1269 Diag(Tok, diag::err_external_source_symbol_expected_keyword);
1270 SkipUntil(tok::r_paren, StopAtSemi);
1275 if (ExpectAndConsume(tok::equal, diag::err_expected_after,
1276 Keyword->getName())) {
1277 SkipUntil(tok::r_paren, StopAtSemi);
1281 bool HadLanguage = HasLanguage, HadDefinedIn = HasDefinedIn;
1282 if (Keyword == Ident_language)
1285 HasDefinedIn = true;
1287 if (Tok.isNot(tok::string_literal)) {
1288 Diag(Tok, diag::err_expected_string_literal)
1289 << /*Source='external_source_symbol attribute'*/ 3
1290 << /*language | source container*/ (Keyword != Ident_language);
1291 SkipUntil(tok::comma, tok::r_paren, StopAtSemi | StopBeforeMatch);
1294 if (Keyword == Ident_language) {
1296 Diag(KeywordLoc, diag::err_external_source_symbol_duplicate_clause)
1298 ParseStringLiteralExpression();
1301 Language = ParseStringLiteralExpression();
1303 assert(Keyword == Ident_defined_in && "Invalid clause keyword!");
1305 Diag(KeywordLoc, diag::err_external_source_symbol_duplicate_clause)
1307 ParseStringLiteralExpression();
1310 DefinedInExpr = ParseStringLiteralExpression();
1312 } while (TryConsumeToken(tok::comma));
1315 if (T.consumeClose())
1318 *EndLoc = T.getCloseLocation();
1320 ArgsUnion Args[] = {Language.get(), DefinedInExpr.get(),
1321 GeneratedDeclaration};
1322 Attrs.addNew(&ExternalSourceSymbol, SourceRange(Loc, T.getCloseLocation()),
1323 ScopeName, ScopeLoc, Args, llvm::array_lengthof(Args), Syntax);
1326 /// Parse the contents of the "objc_bridge_related" attribute.
1327 /// objc_bridge_related '(' related_class ',' opt-class_method ',' opt-instance_method ')'
1331 /// opt-class_method:
1332 /// Identifier: | <empty>
1334 /// opt-instance_method:
1335 /// Identifier | <empty>
1337 void Parser::ParseObjCBridgeRelatedAttribute(IdentifierInfo &ObjCBridgeRelated,
1338 SourceLocation ObjCBridgeRelatedLoc,
1339 ParsedAttributes &attrs,
1340 SourceLocation *endLoc,
1341 IdentifierInfo *ScopeName,
1342 SourceLocation ScopeLoc,
1343 ParsedAttr::Syntax Syntax) {
1345 BalancedDelimiterTracker T(*this, tok::l_paren);
1346 if (T.consumeOpen()) {
1347 Diag(Tok, diag::err_expected) << tok::l_paren;
1351 // Parse the related class name.
1352 if (Tok.isNot(tok::identifier)) {
1353 Diag(Tok, diag::err_objcbridge_related_expected_related_class);
1354 SkipUntil(tok::r_paren, StopAtSemi);
1357 IdentifierLoc *RelatedClass = ParseIdentifierLoc();
1358 if (ExpectAndConsume(tok::comma)) {
1359 SkipUntil(tok::r_paren, StopAtSemi);
1363 // Parse class method name. It's non-optional in the sense that a trailing
1364 // comma is required, but it can be the empty string, and then we record a
1366 IdentifierLoc *ClassMethod = nullptr;
1367 if (Tok.is(tok::identifier)) {
1368 ClassMethod = ParseIdentifierLoc();
1369 if (!TryConsumeToken(tok::colon)) {
1370 Diag(Tok, diag::err_objcbridge_related_selector_name);
1371 SkipUntil(tok::r_paren, StopAtSemi);
1375 if (!TryConsumeToken(tok::comma)) {
1376 if (Tok.is(tok::colon))
1377 Diag(Tok, diag::err_objcbridge_related_selector_name);
1379 Diag(Tok, diag::err_expected) << tok::comma;
1380 SkipUntil(tok::r_paren, StopAtSemi);
1384 // Parse instance method name. Also non-optional but empty string is
1386 IdentifierLoc *InstanceMethod = nullptr;
1387 if (Tok.is(tok::identifier))
1388 InstanceMethod = ParseIdentifierLoc();
1389 else if (Tok.isNot(tok::r_paren)) {
1390 Diag(Tok, diag::err_expected) << tok::r_paren;
1391 SkipUntil(tok::r_paren, StopAtSemi);
1396 if (T.consumeClose())
1400 *endLoc = T.getCloseLocation();
1402 // Record this attribute
1403 attrs.addNew(&ObjCBridgeRelated,
1404 SourceRange(ObjCBridgeRelatedLoc, T.getCloseLocation()),
1405 ScopeName, ScopeLoc,
1412 // Late Parsed Attributes:
1413 // See other examples of late parsing in lib/Parse/ParseCXXInlineMethods
1415 void Parser::LateParsedDeclaration::ParseLexedAttributes() {}
1417 void Parser::LateParsedClass::ParseLexedAttributes() {
1418 Self->ParseLexedAttributes(*Class);
1421 void Parser::LateParsedAttribute::ParseLexedAttributes() {
1422 Self->ParseLexedAttribute(*this, true, false);
1425 /// Wrapper class which calls ParseLexedAttribute, after setting up the
1426 /// scope appropriately.
1427 void Parser::ParseLexedAttributes(ParsingClass &Class) {
1428 // Deal with templates
1429 // FIXME: Test cases to make sure this does the right thing for templates.
1430 bool HasTemplateScope = !Class.TopLevelClass && Class.TemplateScope;
1431 ParseScope ClassTemplateScope(this, Scope::TemplateParamScope,
1433 if (HasTemplateScope)
1434 Actions.ActOnReenterTemplateScope(getCurScope(), Class.TagOrTemplate);
1436 // Set or update the scope flags.
1437 bool AlreadyHasClassScope = Class.TopLevelClass;
1438 unsigned ScopeFlags = Scope::ClassScope|Scope::DeclScope;
1439 ParseScope ClassScope(this, ScopeFlags, !AlreadyHasClassScope);
1440 ParseScopeFlags ClassScopeFlags(this, ScopeFlags, AlreadyHasClassScope);
1442 // Enter the scope of nested classes
1443 if (!AlreadyHasClassScope)
1444 Actions.ActOnStartDelayedMemberDeclarations(getCurScope(),
1445 Class.TagOrTemplate);
1446 if (!Class.LateParsedDeclarations.empty()) {
1447 for (unsigned i = 0, ni = Class.LateParsedDeclarations.size(); i < ni; ++i){
1448 Class.LateParsedDeclarations[i]->ParseLexedAttributes();
1452 if (!AlreadyHasClassScope)
1453 Actions.ActOnFinishDelayedMemberDeclarations(getCurScope(),
1454 Class.TagOrTemplate);
1457 /// Parse all attributes in LAs, and attach them to Decl D.
1458 void Parser::ParseLexedAttributeList(LateParsedAttrList &LAs, Decl *D,
1459 bool EnterScope, bool OnDefinition) {
1460 assert(LAs.parseSoon() &&
1461 "Attribute list should be marked for immediate parsing.");
1462 for (unsigned i = 0, ni = LAs.size(); i < ni; ++i) {
1465 ParseLexedAttribute(*LAs[i], EnterScope, OnDefinition);
1471 /// Finish parsing an attribute for which parsing was delayed.
1472 /// This will be called at the end of parsing a class declaration
1473 /// for each LateParsedAttribute. We consume the saved tokens and
1474 /// create an attribute with the arguments filled in. We add this
1475 /// to the Attribute list for the decl.
1476 void Parser::ParseLexedAttribute(LateParsedAttribute &LA,
1477 bool EnterScope, bool OnDefinition) {
1478 // Create a fake EOF so that attribute parsing won't go off the end of the
1481 AttrEnd.startToken();
1482 AttrEnd.setKind(tok::eof);
1483 AttrEnd.setLocation(Tok.getLocation());
1484 AttrEnd.setEofData(LA.Toks.data());
1485 LA.Toks.push_back(AttrEnd);
1487 // Append the current token at the end of the new token stream so that it
1488 // doesn't get lost.
1489 LA.Toks.push_back(Tok);
1490 PP.EnterTokenStream(LA.Toks, true, /*IsReinject=*/true);
1491 // Consume the previously pushed token.
1492 ConsumeAnyToken(/*ConsumeCodeCompletionTok=*/true);
1494 ParsedAttributes Attrs(AttrFactory);
1495 SourceLocation endLoc;
1497 if (LA.Decls.size() > 0) {
1498 Decl *D = LA.Decls[0];
1499 NamedDecl *ND = dyn_cast<NamedDecl>(D);
1500 RecordDecl *RD = dyn_cast_or_null<RecordDecl>(D->getDeclContext());
1502 // Allow 'this' within late-parsed attributes.
1503 Sema::CXXThisScopeRAII ThisScope(Actions, RD, Qualifiers(),
1504 ND && ND->isCXXInstanceMember());
1506 if (LA.Decls.size() == 1) {
1507 // If the Decl is templatized, add template parameters to scope.
1508 bool HasTemplateScope = EnterScope && D->isTemplateDecl();
1509 ParseScope TempScope(this, Scope::TemplateParamScope, HasTemplateScope);
1510 if (HasTemplateScope)
1511 Actions.ActOnReenterTemplateScope(Actions.CurScope, D);
1513 // If the Decl is on a function, add function parameters to the scope.
1514 bool HasFunScope = EnterScope && D->isFunctionOrFunctionTemplate();
1516 this, Scope::FnScope | Scope::DeclScope | Scope::CompoundStmtScope,
1519 Actions.ActOnReenterFunctionContext(Actions.CurScope, D);
1521 ParseGNUAttributeArgs(&LA.AttrName, LA.AttrNameLoc, Attrs, &endLoc,
1522 nullptr, SourceLocation(), ParsedAttr::AS_GNU,
1526 Actions.ActOnExitFunctionContext();
1527 FnScope.Exit(); // Pop scope, and remove Decls from IdResolver
1529 if (HasTemplateScope) {
1533 // If there are multiple decls, then the decl cannot be within the
1535 ParseGNUAttributeArgs(&LA.AttrName, LA.AttrNameLoc, Attrs, &endLoc,
1536 nullptr, SourceLocation(), ParsedAttr::AS_GNU,
1540 Diag(Tok, diag::warn_attribute_no_decl) << LA.AttrName.getName();
1543 if (OnDefinition && !Attrs.empty() && !Attrs.begin()->isCXX11Attribute() &&
1544 Attrs.begin()->isKnownToGCC())
1545 Diag(Tok, diag::warn_attribute_on_function_definition)
1548 for (unsigned i = 0, ni = LA.Decls.size(); i < ni; ++i)
1549 Actions.ActOnFinishDelayedAttribute(getCurScope(), LA.Decls[i], Attrs);
1551 // Due to a parsing error, we either went over the cached tokens or
1552 // there are still cached tokens left, so we skip the leftover tokens.
1553 while (Tok.isNot(tok::eof))
1556 if (Tok.is(tok::eof) && Tok.getEofData() == AttrEnd.getEofData())
1560 void Parser::ParseTypeTagForDatatypeAttribute(IdentifierInfo &AttrName,
1561 SourceLocation AttrNameLoc,
1562 ParsedAttributes &Attrs,
1563 SourceLocation *EndLoc,
1564 IdentifierInfo *ScopeName,
1565 SourceLocation ScopeLoc,
1566 ParsedAttr::Syntax Syntax) {
1567 assert(Tok.is(tok::l_paren) && "Attribute arg list not starting with '('");
1569 BalancedDelimiterTracker T(*this, tok::l_paren);
1572 if (Tok.isNot(tok::identifier)) {
1573 Diag(Tok, diag::err_expected) << tok::identifier;
1577 IdentifierLoc *ArgumentKind = ParseIdentifierLoc();
1579 if (ExpectAndConsume(tok::comma)) {
1584 SourceRange MatchingCTypeRange;
1585 TypeResult MatchingCType = ParseTypeName(&MatchingCTypeRange);
1586 if (MatchingCType.isInvalid()) {
1591 bool LayoutCompatible = false;
1592 bool MustBeNull = false;
1593 while (TryConsumeToken(tok::comma)) {
1594 if (Tok.isNot(tok::identifier)) {
1595 Diag(Tok, diag::err_expected) << tok::identifier;
1599 IdentifierInfo *Flag = Tok.getIdentifierInfo();
1600 if (Flag->isStr("layout_compatible"))
1601 LayoutCompatible = true;
1602 else if (Flag->isStr("must_be_null"))
1605 Diag(Tok, diag::err_type_safety_unknown_flag) << Flag;
1609 ConsumeToken(); // consume flag
1612 if (!T.consumeClose()) {
1613 Attrs.addNewTypeTagForDatatype(&AttrName, AttrNameLoc, ScopeName, ScopeLoc,
1614 ArgumentKind, MatchingCType.get(),
1615 LayoutCompatible, MustBeNull, Syntax);
1619 *EndLoc = T.getCloseLocation();
1622 /// DiagnoseProhibitedCXX11Attribute - We have found the opening square brackets
1623 /// of a C++11 attribute-specifier in a location where an attribute is not
1624 /// permitted. By C++11 [dcl.attr.grammar]p6, this is ill-formed. Diagnose this
1627 /// \return \c true if we skipped an attribute-like chunk of tokens, \c false if
1628 /// this doesn't appear to actually be an attribute-specifier, and the caller
1629 /// should try to parse it.
1630 bool Parser::DiagnoseProhibitedCXX11Attribute() {
1631 assert(Tok.is(tok::l_square) && NextToken().is(tok::l_square));
1633 switch (isCXX11AttributeSpecifier(/*Disambiguate*/true)) {
1634 case CAK_NotAttributeSpecifier:
1635 // No diagnostic: we're in Obj-C++11 and this is not actually an attribute.
1638 case CAK_InvalidAttributeSpecifier:
1639 Diag(Tok.getLocation(), diag::err_l_square_l_square_not_attribute);
1642 case CAK_AttributeSpecifier:
1643 // Parse and discard the attributes.
1644 SourceLocation BeginLoc = ConsumeBracket();
1646 SkipUntil(tok::r_square);
1647 assert(Tok.is(tok::r_square) && "isCXX11AttributeSpecifier lied");
1648 SourceLocation EndLoc = ConsumeBracket();
1649 Diag(BeginLoc, diag::err_attributes_not_allowed)
1650 << SourceRange(BeginLoc, EndLoc);
1653 llvm_unreachable("All cases handled above.");
1656 /// We have found the opening square brackets of a C++11
1657 /// attribute-specifier in a location where an attribute is not permitted, but
1658 /// we know where the attributes ought to be written. Parse them anyway, and
1659 /// provide a fixit moving them to the right place.
1660 void Parser::DiagnoseMisplacedCXX11Attribute(ParsedAttributesWithRange &Attrs,
1661 SourceLocation CorrectLocation) {
1662 assert((Tok.is(tok::l_square) && NextToken().is(tok::l_square)) ||
1663 Tok.is(tok::kw_alignas));
1665 // Consume the attributes.
1666 SourceLocation Loc = Tok.getLocation();
1667 ParseCXX11Attributes(Attrs);
1668 CharSourceRange AttrRange(SourceRange(Loc, Attrs.Range.getEnd()), true);
1669 // FIXME: use err_attributes_misplaced
1670 Diag(Loc, diag::err_attributes_not_allowed)
1671 << FixItHint::CreateInsertionFromRange(CorrectLocation, AttrRange)
1672 << FixItHint::CreateRemoval(AttrRange);
1675 void Parser::DiagnoseProhibitedAttributes(
1676 const SourceRange &Range, const SourceLocation CorrectLocation) {
1677 if (CorrectLocation.isValid()) {
1678 CharSourceRange AttrRange(Range, true);
1679 Diag(CorrectLocation, diag::err_attributes_misplaced)
1680 << FixItHint::CreateInsertionFromRange(CorrectLocation, AttrRange)
1681 << FixItHint::CreateRemoval(AttrRange);
1683 Diag(Range.getBegin(), diag::err_attributes_not_allowed) << Range;
1686 void Parser::ProhibitCXX11Attributes(ParsedAttributesWithRange &Attrs,
1688 for (const ParsedAttr &AL : Attrs) {
1689 if (!AL.isCXX11Attribute() && !AL.isC2xAttribute())
1691 if (AL.getKind() == ParsedAttr::UnknownAttribute)
1692 Diag(AL.getLoc(), diag::warn_unknown_attribute_ignored) << AL;
1694 Diag(AL.getLoc(), DiagID) << AL;
1700 // Usually, `__attribute__((attrib)) class Foo {} var` means that attribute
1701 // applies to var, not the type Foo.
1702 // As an exception to the rule, __declspec(align(...)) before the
1703 // class-key affects the type instead of the variable.
1704 // Also, Microsoft-style [attributes] seem to affect the type instead of the
1706 // This function moves attributes that should apply to the type off DS to Attrs.
1707 void Parser::stripTypeAttributesOffDeclSpec(ParsedAttributesWithRange &Attrs,
1709 Sema::TagUseKind TUK) {
1710 if (TUK == Sema::TUK_Reference)
1713 llvm::SmallVector<ParsedAttr *, 1> ToBeMoved;
1715 for (ParsedAttr &AL : DS.getAttributes()) {
1716 if ((AL.getKind() == ParsedAttr::AT_Aligned &&
1717 AL.isDeclspecAttribute()) ||
1718 AL.isMicrosoftAttribute())
1719 ToBeMoved.push_back(&AL);
1722 for (ParsedAttr *AL : ToBeMoved) {
1723 DS.getAttributes().remove(AL);
1728 /// ParseDeclaration - Parse a full 'declaration', which consists of
1729 /// declaration-specifiers, some number of declarators, and a semicolon.
1730 /// 'Context' should be a DeclaratorContext value. This returns the
1731 /// location of the semicolon in DeclEnd.
1733 /// declaration: [C99 6.7]
1734 /// block-declaration ->
1735 /// simple-declaration
1737 /// [C++] template-declaration
1738 /// [C++] namespace-definition
1739 /// [C++] using-directive
1740 /// [C++] using-declaration
1741 /// [C++11/C11] static_assert-declaration
1742 /// others... [FIXME]
1744 Parser::DeclGroupPtrTy
1745 Parser::ParseDeclaration(DeclaratorContext Context, SourceLocation &DeclEnd,
1746 ParsedAttributesWithRange &attrs,
1747 SourceLocation *DeclSpecStart) {
1748 ParenBraceBracketBalancer BalancerRAIIObj(*this);
1749 // Must temporarily exit the objective-c container scope for
1750 // parsing c none objective-c decls.
1751 ObjCDeclContextSwitch ObjCDC(*this);
1753 Decl *SingleDecl = nullptr;
1754 switch (Tok.getKind()) {
1755 case tok::kw_template:
1756 case tok::kw_export:
1757 ProhibitAttributes(attrs);
1758 SingleDecl = ParseDeclarationStartingWithTemplate(Context, DeclEnd, attrs);
1760 case tok::kw_inline:
1761 // Could be the start of an inline namespace. Allowed as an ext in C++03.
1762 if (getLangOpts().CPlusPlus && NextToken().is(tok::kw_namespace)) {
1763 ProhibitAttributes(attrs);
1764 SourceLocation InlineLoc = ConsumeToken();
1765 return ParseNamespace(Context, DeclEnd, InlineLoc);
1767 return ParseSimpleDeclaration(Context, DeclEnd, attrs, true, nullptr,
1769 case tok::kw_namespace:
1770 ProhibitAttributes(attrs);
1771 return ParseNamespace(Context, DeclEnd);
1773 return ParseUsingDirectiveOrDeclaration(Context, ParsedTemplateInfo(),
1775 case tok::kw_static_assert:
1776 case tok::kw__Static_assert:
1777 ProhibitAttributes(attrs);
1778 SingleDecl = ParseStaticAssertDeclaration(DeclEnd);
1781 return ParseSimpleDeclaration(Context, DeclEnd, attrs, true, nullptr,
1785 // This routine returns a DeclGroup, if the thing we parsed only contains a
1786 // single decl, convert it now.
1787 return Actions.ConvertDeclToDeclGroup(SingleDecl);
1790 /// simple-declaration: [C99 6.7: declaration] [C++ 7p1: dcl.dcl]
1791 /// declaration-specifiers init-declarator-list[opt] ';'
1792 /// [C++11] attribute-specifier-seq decl-specifier-seq[opt]
1793 /// init-declarator-list ';'
1794 ///[C90/C++]init-declarator-list ';' [TODO]
1795 /// [OMP] threadprivate-directive
1796 /// [OMP] allocate-directive [TODO]
1798 /// for-range-declaration: [C++11 6.5p1: stmt.ranged]
1799 /// attribute-specifier-seq[opt] type-specifier-seq declarator
1801 /// If RequireSemi is false, this does not check for a ';' at the end of the
1802 /// declaration. If it is true, it checks for and eats it.
1804 /// If FRI is non-null, we might be parsing a for-range-declaration instead
1805 /// of a simple-declaration. If we find that we are, we also parse the
1806 /// for-range-initializer, and place it here.
1808 /// DeclSpecStart is used when decl-specifiers are parsed before parsing
1809 /// the Declaration. The SourceLocation for this Decl is set to
1810 /// DeclSpecStart if DeclSpecStart is non-null.
1811 Parser::DeclGroupPtrTy Parser::ParseSimpleDeclaration(
1812 DeclaratorContext Context, SourceLocation &DeclEnd,
1813 ParsedAttributesWithRange &Attrs, bool RequireSemi, ForRangeInit *FRI,
1814 SourceLocation *DeclSpecStart) {
1815 // Parse the common declaration-specifiers piece.
1816 ParsingDeclSpec DS(*this);
1818 DeclSpecContext DSContext = getDeclSpecContextFromDeclaratorContext(Context);
1819 ParseDeclarationSpecifiers(DS, ParsedTemplateInfo(), AS_none, DSContext);
1821 // If we had a free-standing type definition with a missing semicolon, we
1822 // may get this far before the problem becomes obvious.
1823 if (DS.hasTagDefinition() &&
1824 DiagnoseMissingSemiAfterTagDefinition(DS, AS_none, DSContext))
1827 // C99 6.7.2.3p6: Handle "struct-or-union identifier;", "enum { X };"
1828 // declaration-specifiers init-declarator-list[opt] ';'
1829 if (Tok.is(tok::semi)) {
1830 ProhibitAttributes(Attrs);
1831 DeclEnd = Tok.getLocation();
1832 if (RequireSemi) ConsumeToken();
1833 RecordDecl *AnonRecord = nullptr;
1834 Decl *TheDecl = Actions.ParsedFreeStandingDeclSpec(getCurScope(), AS_none,
1836 DS.complete(TheDecl);
1838 Decl* decls[] = {AnonRecord, TheDecl};
1839 return Actions.BuildDeclaratorGroup(decls);
1841 return Actions.ConvertDeclToDeclGroup(TheDecl);
1845 DS.SetRangeStart(*DeclSpecStart);
1847 DS.takeAttributesFrom(Attrs);
1848 return ParseDeclGroup(DS, Context, &DeclEnd, FRI);
1851 /// Returns true if this might be the start of a declarator, or a common typo
1852 /// for a declarator.
1853 bool Parser::MightBeDeclarator(DeclaratorContext Context) {
1854 switch (Tok.getKind()) {
1855 case tok::annot_cxxscope:
1856 case tok::annot_template_id:
1858 case tok::code_completion:
1859 case tok::coloncolon:
1861 case tok::kw___attribute:
1862 case tok::kw_operator:
1869 return getLangOpts().CPlusPlus;
1871 case tok::l_square: // Might be an attribute on an unnamed bit-field.
1872 return Context == DeclaratorContext::MemberContext &&
1873 getLangOpts().CPlusPlus11 && NextToken().is(tok::l_square);
1875 case tok::colon: // Might be a typo for '::' or an unnamed bit-field.
1876 return Context == DeclaratorContext::MemberContext ||
1877 getLangOpts().CPlusPlus;
1879 case tok::identifier:
1880 switch (NextToken().getKind()) {
1881 case tok::code_completion:
1882 case tok::coloncolon:
1885 case tok::equalequal: // Might be a typo for '='.
1886 case tok::kw_alignas:
1888 case tok::kw___attribute:
1900 // At namespace scope, 'identifier:' is probably a typo for 'identifier::'
1901 // and in block scope it's probably a label. Inside a class definition,
1902 // this is a bit-field.
1903 return Context == DeclaratorContext::MemberContext ||
1904 (getLangOpts().CPlusPlus &&
1905 Context == DeclaratorContext::FileContext);
1907 case tok::identifier: // Possible virt-specifier.
1908 return getLangOpts().CPlusPlus11 && isCXX11VirtSpecifier(NextToken());
1919 /// Skip until we reach something which seems like a sensible place to pick
1920 /// up parsing after a malformed declaration. This will sometimes stop sooner
1921 /// than SkipUntil(tok::r_brace) would, but will never stop later.
1922 void Parser::SkipMalformedDecl() {
1924 switch (Tok.getKind()) {
1926 // Skip until matching }, then stop. We've probably skipped over
1927 // a malformed class or function definition or similar.
1929 SkipUntil(tok::r_brace);
1930 if (Tok.isOneOf(tok::comma, tok::l_brace, tok::kw_try)) {
1931 // This declaration isn't over yet. Keep skipping.
1934 TryConsumeToken(tok::semi);
1939 SkipUntil(tok::r_square);
1944 SkipUntil(tok::r_paren);
1954 case tok::kw_inline:
1955 // 'inline namespace' at the start of a line is almost certainly
1956 // a good place to pick back up parsing, except in an Objective-C
1957 // @interface context.
1958 if (Tok.isAtStartOfLine() && NextToken().is(tok::kw_namespace) &&
1959 (!ParsingInObjCContainer || CurParsedObjCImpl))
1963 case tok::kw_namespace:
1964 // 'namespace' at the start of a line is almost certainly a good
1965 // place to pick back up parsing, except in an Objective-C
1966 // @interface context.
1967 if (Tok.isAtStartOfLine() &&
1968 (!ParsingInObjCContainer || CurParsedObjCImpl))
1973 // @end is very much like } in Objective-C contexts.
1974 if (NextToken().isObjCAtKeyword(tok::objc_end) &&
1975 ParsingInObjCContainer)
1981 // - and + probably start new method declarations in Objective-C contexts.
1982 if (Tok.isAtStartOfLine() && ParsingInObjCContainer)
1987 case tok::annot_module_begin:
1988 case tok::annot_module_end:
1989 case tok::annot_module_include:
2000 /// ParseDeclGroup - Having concluded that this is either a function
2001 /// definition or a group of object declarations, actually parse the
2003 Parser::DeclGroupPtrTy Parser::ParseDeclGroup(ParsingDeclSpec &DS,
2004 DeclaratorContext Context,
2005 SourceLocation *DeclEnd,
2006 ForRangeInit *FRI) {
2007 // Parse the first declarator.
2008 ParsingDeclarator D(*this, DS, Context);
2011 // Bail out if the first declarator didn't seem well-formed.
2012 if (!D.hasName() && !D.mayOmitIdentifier()) {
2013 SkipMalformedDecl();
2017 if (Tok.is(tok::kw_requires))
2018 ParseTrailingRequiresClause(D);
2020 // Save late-parsed attributes for now; they need to be parsed in the
2021 // appropriate function scope after the function Decl has been constructed.
2022 // These will be parsed in ParseFunctionDefinition or ParseLexedAttrList.
2023 LateParsedAttrList LateParsedAttrs(true);
2024 if (D.isFunctionDeclarator()) {
2025 MaybeParseGNUAttributes(D, &LateParsedAttrs);
2027 // The _Noreturn keyword can't appear here, unlike the GNU noreturn
2028 // attribute. If we find the keyword here, tell the user to put it
2029 // at the start instead.
2030 if (Tok.is(tok::kw__Noreturn)) {
2031 SourceLocation Loc = ConsumeToken();
2032 const char *PrevSpec;
2035 // We can offer a fixit if it's valid to mark this function as _Noreturn
2036 // and we don't have any other declarators in this declaration.
2037 bool Fixit = !DS.setFunctionSpecNoreturn(Loc, PrevSpec, DiagID);
2038 MaybeParseGNUAttributes(D, &LateParsedAttrs);
2039 Fixit &= Tok.isOneOf(tok::semi, tok::l_brace, tok::kw_try);
2041 Diag(Loc, diag::err_c11_noreturn_misplaced)
2042 << (Fixit ? FixItHint::CreateRemoval(Loc) : FixItHint())
2043 << (Fixit ? FixItHint::CreateInsertion(D.getBeginLoc(), "_Noreturn ")
2048 // Check to see if we have a function *definition* which must have a body.
2049 if (D.isFunctionDeclarator() &&
2050 // Look at the next token to make sure that this isn't a function
2051 // declaration. We have to check this because __attribute__ might be the
2052 // start of a function definition in GCC-extended K&R C.
2053 !isDeclarationAfterDeclarator()) {
2055 // Function definitions are only allowed at file scope and in C++ classes.
2056 // The C++ inline method definition case is handled elsewhere, so we only
2057 // need to handle the file scope definition case.
2058 if (Context == DeclaratorContext::FileContext) {
2059 if (isStartOfFunctionDefinition(D)) {
2060 if (DS.getStorageClassSpec() == DeclSpec::SCS_typedef) {
2061 Diag(Tok, diag::err_function_declared_typedef);
2063 // Recover by treating the 'typedef' as spurious.
2064 DS.ClearStorageClassSpecs();
2068 ParseFunctionDefinition(D, ParsedTemplateInfo(), &LateParsedAttrs);
2069 return Actions.ConvertDeclToDeclGroup(TheDecl);
2072 if (isDeclarationSpecifier()) {
2073 // If there is an invalid declaration specifier right after the
2074 // function prototype, then we must be in a missing semicolon case
2075 // where this isn't actually a body. Just fall through into the code
2076 // that handles it as a prototype, and let the top-level code handle
2077 // the erroneous declspec where it would otherwise expect a comma or
2080 Diag(Tok, diag::err_expected_fn_body);
2081 SkipUntil(tok::semi);
2085 if (Tok.is(tok::l_brace)) {
2086 Diag(Tok, diag::err_function_definition_not_allowed);
2087 SkipMalformedDecl();
2093 if (ParseAsmAttributesAfterDeclarator(D))
2096 // C++0x [stmt.iter]p1: Check if we have a for-range-declarator. If so, we
2097 // must parse and analyze the for-range-initializer before the declaration is
2100 // Handle the Objective-C for-in loop variable similarly, although we
2101 // don't need to parse the container in advance.
2102 if (FRI && (Tok.is(tok::colon) || isTokIdentifier_in())) {
2103 bool IsForRangeLoop = false;
2104 if (TryConsumeToken(tok::colon, FRI->ColonLoc)) {
2105 IsForRangeLoop = true;
2106 if (getLangOpts().OpenMP)
2107 Actions.startOpenMPCXXRangeFor();
2108 if (Tok.is(tok::l_brace))
2109 FRI->RangeExpr = ParseBraceInitializer();
2111 FRI->RangeExpr = ParseExpression();
2114 Decl *ThisDecl = Actions.ActOnDeclarator(getCurScope(), D);
2115 if (IsForRangeLoop) {
2116 Actions.ActOnCXXForRangeDecl(ThisDecl);
2119 if (auto *VD = dyn_cast_or_null<VarDecl>(ThisDecl))
2120 VD->setObjCForDecl(true);
2122 Actions.FinalizeDeclaration(ThisDecl);
2123 D.complete(ThisDecl);
2124 return Actions.FinalizeDeclaratorGroup(getCurScope(), DS, ThisDecl);
2127 SmallVector<Decl *, 8> DeclsInGroup;
2128 Decl *FirstDecl = ParseDeclarationAfterDeclaratorAndAttributes(
2129 D, ParsedTemplateInfo(), FRI);
2130 if (LateParsedAttrs.size() > 0)
2131 ParseLexedAttributeList(LateParsedAttrs, FirstDecl, true, false);
2132 D.complete(FirstDecl);
2134 DeclsInGroup.push_back(FirstDecl);
2136 bool ExpectSemi = Context != DeclaratorContext::ForContext;
2138 // If we don't have a comma, it is either the end of the list (a ';') or an
2140 SourceLocation CommaLoc;
2141 while (TryConsumeToken(tok::comma, CommaLoc)) {
2142 if (Tok.isAtStartOfLine() && ExpectSemi && !MightBeDeclarator(Context)) {
2143 // This comma was followed by a line-break and something which can't be
2144 // the start of a declarator. The comma was probably a typo for a
2146 Diag(CommaLoc, diag::err_expected_semi_declaration)
2147 << FixItHint::CreateReplacement(CommaLoc, ";");
2152 // Parse the next declarator.
2154 D.setCommaLoc(CommaLoc);
2156 // Accept attributes in an init-declarator. In the first declarator in a
2157 // declaration, these would be part of the declspec. In subsequent
2158 // declarators, they become part of the declarator itself, so that they
2159 // don't apply to declarators after *this* one. Examples:
2160 // short __attribute__((common)) var; -> declspec
2161 // short var __attribute__((common)); -> declarator
2162 // short x, __attribute__((common)) var; -> declarator
2163 MaybeParseGNUAttributes(D);
2165 // MSVC parses but ignores qualifiers after the comma as an extension.
2166 if (getLangOpts().MicrosoftExt)
2167 DiagnoseAndSkipExtendedMicrosoftTypeAttributes();
2170 if (!D.isInvalidType()) {
2171 // C++2a [dcl.decl]p1
2173 // declarator initializer[opt]
2174 // declarator requires-clause
2175 if (Tok.is(tok::kw_requires))
2176 ParseTrailingRequiresClause(D);
2177 Decl *ThisDecl = ParseDeclarationAfterDeclarator(D);
2178 D.complete(ThisDecl);
2180 DeclsInGroup.push_back(ThisDecl);
2185 *DeclEnd = Tok.getLocation();
2188 ExpectAndConsumeSemi(Context == DeclaratorContext::FileContext
2189 ? diag::err_invalid_token_after_toplevel_declarator
2190 : diag::err_expected_semi_declaration)) {
2191 // Okay, there was no semicolon and one was expected. If we see a
2192 // declaration specifier, just assume it was missing and continue parsing.
2193 // Otherwise things are very confused and we skip to recover.
2194 if (!isDeclarationSpecifier()) {
2195 SkipUntil(tok::r_brace, StopAtSemi | StopBeforeMatch);
2196 TryConsumeToken(tok::semi);
2200 return Actions.FinalizeDeclaratorGroup(getCurScope(), DS, DeclsInGroup);
2203 /// Parse an optional simple-asm-expr and attributes, and attach them to a
2204 /// declarator. Returns true on an error.
2205 bool Parser::ParseAsmAttributesAfterDeclarator(Declarator &D) {
2206 // If a simple-asm-expr is present, parse it.
2207 if (Tok.is(tok::kw_asm)) {
2209 ExprResult AsmLabel(ParseSimpleAsm(/*ForAsmLabel*/ true, &Loc));
2210 if (AsmLabel.isInvalid()) {
2211 SkipUntil(tok::semi, StopBeforeMatch);
2215 D.setAsmLabel(AsmLabel.get());
2219 MaybeParseGNUAttributes(D);
2223 /// Parse 'declaration' after parsing 'declaration-specifiers
2224 /// declarator'. This method parses the remainder of the declaration
2225 /// (including any attributes or initializer, among other things) and
2226 /// finalizes the declaration.
2228 /// init-declarator: [C99 6.7]
2230 /// declarator '=' initializer
2231 /// [GNU] declarator simple-asm-expr[opt] attributes[opt]
2232 /// [GNU] declarator simple-asm-expr[opt] attributes[opt] '=' initializer
2233 /// [C++] declarator initializer[opt]
2235 /// [C++] initializer:
2236 /// [C++] '=' initializer-clause
2237 /// [C++] '(' expression-list ')'
2238 /// [C++0x] '=' 'default' [TODO]
2239 /// [C++0x] '=' 'delete'
2240 /// [C++0x] braced-init-list
2242 /// According to the standard grammar, =default and =delete are function
2243 /// definitions, but that definitely doesn't fit with the parser here.
2245 Decl *Parser::ParseDeclarationAfterDeclarator(
2246 Declarator &D, const ParsedTemplateInfo &TemplateInfo) {
2247 if (ParseAsmAttributesAfterDeclarator(D))
2250 return ParseDeclarationAfterDeclaratorAndAttributes(D, TemplateInfo);
2253 Decl *Parser::ParseDeclarationAfterDeclaratorAndAttributes(
2254 Declarator &D, const ParsedTemplateInfo &TemplateInfo, ForRangeInit *FRI) {
2255 // RAII type used to track whether we're inside an initializer.
2256 struct InitializerScopeRAII {
2261 InitializerScopeRAII(Parser &P, Declarator &D, Decl *ThisDecl)
2262 : P(P), D(D), ThisDecl(ThisDecl) {
2263 if (ThisDecl && P.getLangOpts().CPlusPlus) {
2265 if (D.getCXXScopeSpec().isSet()) {
2267 S = P.getCurScope();
2269 P.Actions.ActOnCXXEnterDeclInitializer(S, ThisDecl);
2272 ~InitializerScopeRAII() { pop(); }
2274 if (ThisDecl && P.getLangOpts().CPlusPlus) {
2276 if (D.getCXXScopeSpec().isSet())
2277 S = P.getCurScope();
2278 P.Actions.ActOnCXXExitDeclInitializer(S, ThisDecl);
2286 // Inform the current actions module that we just parsed this declarator.
2287 Decl *ThisDecl = nullptr;
2288 switch (TemplateInfo.Kind) {
2289 case ParsedTemplateInfo::NonTemplate:
2290 ThisDecl = Actions.ActOnDeclarator(getCurScope(), D);
2293 case ParsedTemplateInfo::Template:
2294 case ParsedTemplateInfo::ExplicitSpecialization: {
2295 ThisDecl = Actions.ActOnTemplateDeclarator(getCurScope(),
2296 *TemplateInfo.TemplateParams,
2298 if (VarTemplateDecl *VT = dyn_cast_or_null<VarTemplateDecl>(ThisDecl))
2299 // Re-direct this decl to refer to the templated decl so that we can
2301 ThisDecl = VT->getTemplatedDecl();
2304 case ParsedTemplateInfo::ExplicitInstantiation: {
2305 if (Tok.is(tok::semi)) {
2306 DeclResult ThisRes = Actions.ActOnExplicitInstantiation(
2307 getCurScope(), TemplateInfo.ExternLoc, TemplateInfo.TemplateLoc, D);
2308 if (ThisRes.isInvalid()) {
2309 SkipUntil(tok::semi, StopBeforeMatch);
2312 ThisDecl = ThisRes.get();
2314 // FIXME: This check should be for a variable template instantiation only.
2316 // Check that this is a valid instantiation
2317 if (D.getName().getKind() != UnqualifiedIdKind::IK_TemplateId) {
2318 // If the declarator-id is not a template-id, issue a diagnostic and
2319 // recover by ignoring the 'template' keyword.
2320 Diag(Tok, diag::err_template_defn_explicit_instantiation)
2321 << 2 << FixItHint::CreateRemoval(TemplateInfo.TemplateLoc);
2322 ThisDecl = Actions.ActOnDeclarator(getCurScope(), D);
2324 SourceLocation LAngleLoc =
2325 PP.getLocForEndOfToken(TemplateInfo.TemplateLoc);
2326 Diag(D.getIdentifierLoc(),
2327 diag::err_explicit_instantiation_with_definition)
2328 << SourceRange(TemplateInfo.TemplateLoc)
2329 << FixItHint::CreateInsertion(LAngleLoc, "<>");
2331 // Recover as if it were an explicit specialization.
2332 TemplateParameterLists FakedParamLists;
2333 FakedParamLists.push_back(Actions.ActOnTemplateParameterList(
2334 0, SourceLocation(), TemplateInfo.TemplateLoc, LAngleLoc, None,
2335 LAngleLoc, nullptr));
2338 Actions.ActOnTemplateDeclarator(getCurScope(), FakedParamLists, D);
2345 // Parse declarator '=' initializer.
2346 // If a '==' or '+=' is found, suggest a fixit to '='.
2347 if (isTokenEqualOrEqualTypo()) {
2348 SourceLocation EqualLoc = ConsumeToken();
2350 if (Tok.is(tok::kw_delete)) {
2351 if (D.isFunctionDeclarator())
2352 Diag(ConsumeToken(), diag::err_default_delete_in_multiple_declaration)
2355 Diag(ConsumeToken(), diag::err_deleted_non_function);
2356 } else if (Tok.is(tok::kw_default)) {
2357 if (D.isFunctionDeclarator())
2358 Diag(ConsumeToken(), diag::err_default_delete_in_multiple_declaration)
2361 Diag(ConsumeToken(), diag::err_default_special_members)
2362 << getLangOpts().CPlusPlus2a;
2364 InitializerScopeRAII InitScope(*this, D, ThisDecl);
2366 if (Tok.is(tok::code_completion)) {
2367 Actions.CodeCompleteInitializer(getCurScope(), ThisDecl);
2368 Actions.FinalizeDeclaration(ThisDecl);
2373 PreferredType.enterVariableInit(Tok.getLocation(), ThisDecl);
2374 ExprResult Init = ParseInitializer();
2376 // If this is the only decl in (possibly) range based for statement,
2377 // our best guess is that the user meant ':' instead of '='.
2378 if (Tok.is(tok::r_paren) && FRI && D.isFirstDeclarator()) {
2379 Diag(EqualLoc, diag::err_single_decl_assign_in_for_range)
2380 << FixItHint::CreateReplacement(EqualLoc, ":");
2381 // We are trying to stop parser from looking for ';' in this for
2382 // statement, therefore preventing spurious errors to be issued.
2383 FRI->ColonLoc = EqualLoc;
2385 FRI->RangeExpr = Init;
2390 if (Init.isInvalid()) {
2391 SmallVector<tok::TokenKind, 2> StopTokens;
2392 StopTokens.push_back(tok::comma);
2393 if (D.getContext() == DeclaratorContext::ForContext ||
2394 D.getContext() == DeclaratorContext::InitStmtContext)
2395 StopTokens.push_back(tok::r_paren);
2396 SkipUntil(StopTokens, StopAtSemi | StopBeforeMatch);
2397 Actions.ActOnInitializerError(ThisDecl);
2399 Actions.AddInitializerToDecl(ThisDecl, Init.get(),
2400 /*DirectInit=*/false);
2402 } else if (Tok.is(tok::l_paren)) {
2403 // Parse C++ direct initializer: '(' expression-list ')'
2404 BalancedDelimiterTracker T(*this, tok::l_paren);
2408 CommaLocsTy CommaLocs;
2410 InitializerScopeRAII InitScope(*this, D, ThisDecl);
2412 auto ThisVarDecl = dyn_cast_or_null<VarDecl>(ThisDecl);
2413 auto RunSignatureHelp = [&]() {
2414 QualType PreferredType = Actions.ProduceConstructorSignatureHelp(
2415 getCurScope(), ThisVarDecl->getType()->getCanonicalTypeInternal(),
2416 ThisDecl->getLocation(), Exprs, T.getOpenLocation());
2417 CalledSignatureHelp = true;
2418 return PreferredType;
2420 auto SetPreferredType = [&] {
2421 PreferredType.enterFunctionArgument(Tok.getLocation(), RunSignatureHelp);
2424 llvm::function_ref<void()> ExpressionStarts;
2426 // ParseExpressionList can sometimes succeed even when ThisDecl is not
2427 // VarDecl. This is an error and it is reported in a call to
2428 // Actions.ActOnInitializerError(). However, we call
2429 // ProduceConstructorSignatureHelp only on VarDecls.
2430 ExpressionStarts = SetPreferredType;
2432 if (ParseExpressionList(Exprs, CommaLocs, ExpressionStarts)) {
2433 if (ThisVarDecl && PP.isCodeCompletionReached() && !CalledSignatureHelp) {
2434 Actions.ProduceConstructorSignatureHelp(
2435 getCurScope(), ThisVarDecl->getType()->getCanonicalTypeInternal(),
2436 ThisDecl->getLocation(), Exprs, T.getOpenLocation());
2437 CalledSignatureHelp = true;
2439 Actions.ActOnInitializerError(ThisDecl);
2440 SkipUntil(tok::r_paren, StopAtSemi);
2445 assert(!Exprs.empty() && Exprs.size()-1 == CommaLocs.size() &&
2446 "Unexpected number of commas!");
2450 ExprResult Initializer = Actions.ActOnParenListExpr(T.getOpenLocation(),
2451 T.getCloseLocation(),
2453 Actions.AddInitializerToDecl(ThisDecl, Initializer.get(),
2454 /*DirectInit=*/true);
2456 } else if (getLangOpts().CPlusPlus11 && Tok.is(tok::l_brace) &&
2457 (!CurParsedObjCImpl || !D.isFunctionDeclarator())) {
2458 // Parse C++0x braced-init-list.
2459 Diag(Tok, diag::warn_cxx98_compat_generalized_initializer_lists);
2461 InitializerScopeRAII InitScope(*this, D, ThisDecl);
2463 ExprResult Init(ParseBraceInitializer());
2467 if (Init.isInvalid()) {
2468 Actions.ActOnInitializerError(ThisDecl);
2470 Actions.AddInitializerToDecl(ThisDecl, Init.get(), /*DirectInit=*/true);
2473 Actions.ActOnUninitializedDecl(ThisDecl);
2476 Actions.FinalizeDeclaration(ThisDecl);
2481 /// ParseSpecifierQualifierList
2482 /// specifier-qualifier-list:
2483 /// type-specifier specifier-qualifier-list[opt]
2484 /// type-qualifier specifier-qualifier-list[opt]
2485 /// [GNU] attributes specifier-qualifier-list[opt]
2487 void Parser::ParseSpecifierQualifierList(DeclSpec &DS, AccessSpecifier AS,
2488 DeclSpecContext DSC) {
2489 /// specifier-qualifier-list is a subset of declaration-specifiers. Just
2490 /// parse declaration-specifiers and complain about extra stuff.
2491 /// TODO: diagnose attribute-specifiers and alignment-specifiers.
2492 ParseDeclarationSpecifiers(DS, ParsedTemplateInfo(), AS, DSC);
2494 // Validate declspec for type-name.
2495 unsigned Specs = DS.getParsedSpecifiers();
2496 if (isTypeSpecifier(DSC) && !DS.hasTypeSpecifier()) {
2497 Diag(Tok, diag::err_expected_type);
2498 DS.SetTypeSpecError();
2499 } else if (Specs == DeclSpec::PQ_None && !DS.hasAttributes()) {
2500 Diag(Tok, diag::err_typename_requires_specqual);
2501 if (!DS.hasTypeSpecifier())
2502 DS.SetTypeSpecError();
2505 // Issue diagnostic and remove storage class if present.
2506 if (Specs & DeclSpec::PQ_StorageClassSpecifier) {
2507 if (DS.getStorageClassSpecLoc().isValid())
2508 Diag(DS.getStorageClassSpecLoc(),diag::err_typename_invalid_storageclass);
2510 Diag(DS.getThreadStorageClassSpecLoc(),
2511 diag::err_typename_invalid_storageclass);
2512 DS.ClearStorageClassSpecs();
2515 // Issue diagnostic and remove function specifier if present.
2516 if (Specs & DeclSpec::PQ_FunctionSpecifier) {
2517 if (DS.isInlineSpecified())
2518 Diag(DS.getInlineSpecLoc(), diag::err_typename_invalid_functionspec);
2519 if (DS.isVirtualSpecified())
2520 Diag(DS.getVirtualSpecLoc(), diag::err_typename_invalid_functionspec);
2521 if (DS.hasExplicitSpecifier())
2522 Diag(DS.getExplicitSpecLoc(), diag::err_typename_invalid_functionspec);
2523 DS.ClearFunctionSpecs();
2526 // Issue diagnostic and remove constexpr specifier if present.
2527 if (DS.hasConstexprSpecifier() && DSC != DeclSpecContext::DSC_condition) {
2528 Diag(DS.getConstexprSpecLoc(), diag::err_typename_invalid_constexpr)
2529 << DS.getConstexprSpecifier();
2530 DS.ClearConstexprSpec();
2534 /// isValidAfterIdentifierInDeclaratorAfterDeclSpec - Return true if the
2535 /// specified token is valid after the identifier in a declarator which
2536 /// immediately follows the declspec. For example, these things are valid:
2538 /// int x [ 4]; // direct-declarator
2539 /// int x ( int y); // direct-declarator
2540 /// int(int x ) // direct-declarator
2541 /// int x ; // simple-declaration
2542 /// int x = 17; // init-declarator-list
2543 /// int x , y; // init-declarator-list
2544 /// int x __asm__ ("foo"); // init-declarator-list
2545 /// int x : 4; // struct-declarator
2546 /// int x { 5}; // C++'0x unified initializers
2548 /// This is not, because 'x' does not immediately follow the declspec (though
2549 /// ')' happens to be valid anyway).
2552 static bool isValidAfterIdentifierInDeclarator(const Token &T) {
2553 return T.isOneOf(tok::l_square, tok::l_paren, tok::r_paren, tok::semi,
2554 tok::comma, tok::equal, tok::kw_asm, tok::l_brace,
2558 /// ParseImplicitInt - This method is called when we have an non-typename
2559 /// identifier in a declspec (which normally terminates the decl spec) when
2560 /// the declspec has no type specifier. In this case, the declspec is either
2561 /// malformed or is "implicit int" (in K&R and C89).
2563 /// This method handles diagnosing this prettily and returns false if the
2564 /// declspec is done being processed. If it recovers and thinks there may be
2565 /// other pieces of declspec after it, it returns true.
2567 bool Parser::ParseImplicitInt(DeclSpec &DS, CXXScopeSpec *SS,
2568 const ParsedTemplateInfo &TemplateInfo,
2569 AccessSpecifier AS, DeclSpecContext DSC,
2570 ParsedAttributesWithRange &Attrs) {
2571 assert(Tok.is(tok::identifier) && "should have identifier");
2573 SourceLocation Loc = Tok.getLocation();
2574 // If we see an identifier that is not a type name, we normally would
2575 // parse it as the identifier being declared. However, when a typename
2576 // is typo'd or the definition is not included, this will incorrectly
2577 // parse the typename as the identifier name and fall over misparsing
2578 // later parts of the diagnostic.
2580 // As such, we try to do some look-ahead in cases where this would
2581 // otherwise be an "implicit-int" case to see if this is invalid. For
2582 // example: "static foo_t x = 4;" In this case, if we parsed foo_t as
2583 // an identifier with implicit int, we'd get a parse error because the
2584 // next token is obviously invalid for a type. Parse these as a case
2585 // with an invalid type specifier.
2586 assert(!DS.hasTypeSpecifier() && "Type specifier checked above");
2588 // Since we know that this either implicit int (which is rare) or an
2589 // error, do lookahead to try to do better recovery. This never applies
2590 // within a type specifier. Outside of C++, we allow this even if the
2591 // language doesn't "officially" support implicit int -- we support
2592 // implicit int as an extension in C99 and C11.
2593 if (!isTypeSpecifier(DSC) && !getLangOpts().CPlusPlus &&
2594 isValidAfterIdentifierInDeclarator(NextToken())) {
2595 // If this token is valid for implicit int, e.g. "static x = 4", then
2596 // we just avoid eating the identifier, so it will be parsed as the
2597 // identifier in the declarator.
2601 // Early exit as Sema has a dedicated missing_actual_pipe_type diagnostic
2602 // for incomplete declarations such as `pipe p`.
2603 if (getLangOpts().OpenCLCPlusPlus && DS.isTypeSpecPipe())
2606 if (getLangOpts().CPlusPlus &&
2607 DS.getStorageClassSpec() == DeclSpec::SCS_auto) {
2608 // Don't require a type specifier if we have the 'auto' storage class
2609 // specifier in C++98 -- we'll promote it to a type specifier.
2611 AnnotateScopeToken(*SS, /*IsNewAnnotation*/false);
2615 if (getLangOpts().CPlusPlus && (!SS || SS->isEmpty()) &&
2616 getLangOpts().MSVCCompat) {
2617 // Lookup of an unqualified type name has failed in MSVC compatibility mode.
2618 // Give Sema a chance to recover if we are in a template with dependent base
2620 if (ParsedType T = Actions.ActOnMSVCUnknownTypeName(
2621 *Tok.getIdentifierInfo(), Tok.getLocation(),
2622 DSC == DeclSpecContext::DSC_template_type_arg)) {
2623 const char *PrevSpec;
2625 DS.SetTypeSpecType(DeclSpec::TST_typename, Loc, PrevSpec, DiagID, T,
2626 Actions.getASTContext().getPrintingPolicy());
2627 DS.SetRangeEnd(Tok.getLocation());
2633 // Otherwise, if we don't consume this token, we are going to emit an
2634 // error anyway. Try to recover from various common problems. Check
2635 // to see if this was a reference to a tag name without a tag specified.
2636 // This is a common problem in C (saying 'foo' instead of 'struct foo').
2638 // C++ doesn't need this, and isTagName doesn't take SS.
2639 if (SS == nullptr) {
2640 const char *TagName = nullptr, *FixitTagName = nullptr;
2641 tok::TokenKind TagKind = tok::unknown;
2643 switch (Actions.isTagName(*Tok.getIdentifierInfo(), getCurScope())) {
2645 case DeclSpec::TST_enum:
2646 TagName="enum" ; FixitTagName = "enum " ; TagKind=tok::kw_enum ;break;
2647 case DeclSpec::TST_union:
2648 TagName="union" ; FixitTagName = "union " ;TagKind=tok::kw_union ;break;
2649 case DeclSpec::TST_struct:
2650 TagName="struct"; FixitTagName = "struct ";TagKind=tok::kw_struct;break;
2651 case DeclSpec::TST_interface:
2652 TagName="__interface"; FixitTagName = "__interface ";
2653 TagKind=tok::kw___interface;break;
2654 case DeclSpec::TST_class:
2655 TagName="class" ; FixitTagName = "class " ;TagKind=tok::kw_class ;break;
2659 IdentifierInfo *TokenName = Tok.getIdentifierInfo();
2660 LookupResult R(Actions, TokenName, SourceLocation(),
2661 Sema::LookupOrdinaryName);
2663 Diag(Loc, diag::err_use_of_tag_name_without_tag)
2664 << TokenName << TagName << getLangOpts().CPlusPlus
2665 << FixItHint::CreateInsertion(Tok.getLocation(), FixitTagName);
2667 if (Actions.LookupParsedName(R, getCurScope(), SS)) {
2668 for (LookupResult::iterator I = R.begin(), IEnd = R.end();
2670 Diag((*I)->getLocation(), diag::note_decl_hiding_tag_type)
2671 << TokenName << TagName;
2674 // Parse this as a tag as if the missing tag were present.
2675 if (TagKind == tok::kw_enum)
2676 ParseEnumSpecifier(Loc, DS, TemplateInfo, AS,
2677 DeclSpecContext::DSC_normal);
2679 ParseClassSpecifier(TagKind, Loc, DS, TemplateInfo, AS,
2680 /*EnteringContext*/ false,
2681 DeclSpecContext::DSC_normal, Attrs);
2686 // Determine whether this identifier could plausibly be the name of something
2687 // being declared (with a missing type).
2688 if (!isTypeSpecifier(DSC) && (!SS || DSC == DeclSpecContext::DSC_top_level ||
2689 DSC == DeclSpecContext::DSC_class)) {
2690 // Look ahead to the next token to try to figure out what this declaration
2691 // was supposed to be.
2692 switch (NextToken().getKind()) {
2693 case tok::l_paren: {
2694 // static x(4); // 'x' is not a type
2695 // x(int n); // 'x' is not a type
2696 // x (*p)[]; // 'x' is a type
2698 // Since we're in an error case, we can afford to perform a tentative
2699 // parse to determine which case we're in.
2700 TentativeParsingAction PA(*this);
2702 TPResult TPR = TryParseDeclarator(/*mayBeAbstract*/false);
2705 if (TPR != TPResult::False) {
2706 // The identifier is followed by a parenthesized declarator.
2707 // It's supposed to be a type.
2711 // If we're in a context where we could be declaring a constructor,
2712 // check whether this is a constructor declaration with a bogus name.
2713 if (DSC == DeclSpecContext::DSC_class ||
2714 (DSC == DeclSpecContext::DSC_top_level && SS)) {
2715 IdentifierInfo *II = Tok.getIdentifierInfo();
2716 if (Actions.isCurrentClassNameTypo(II, SS)) {
2717 Diag(Loc, diag::err_constructor_bad_name)
2718 << Tok.getIdentifierInfo() << II
2719 << FixItHint::CreateReplacement(Tok.getLocation(), II->getName());
2720 Tok.setIdentifierInfo(II);
2732 // This looks like a variable or function declaration. The type is
2733 // probably missing. We're done parsing decl-specifiers.
2734 // But only if we are not in a function prototype scope.
2735 if (getCurScope()->isFunctionPrototypeScope())
2738 AnnotateScopeToken(*SS, /*IsNewAnnotation*/false);
2742 // This is probably supposed to be a type. This includes cases like:
2744 // struct S { unsinged : 4; };
2749 // This is almost certainly an invalid type name. Let Sema emit a diagnostic
2750 // and attempt to recover.
2752 IdentifierInfo *II = Tok.getIdentifierInfo();
2753 bool IsTemplateName = getLangOpts().CPlusPlus && NextToken().is(tok::less);
2754 Actions.DiagnoseUnknownTypeName(II, Loc, getCurScope(), SS, T,
2757 // The action has suggested that the type T could be used. Set that as
2758 // the type in the declaration specifiers, consume the would-be type
2759 // name token, and we're done.
2760 const char *PrevSpec;
2762 DS.SetTypeSpecType(DeclSpec::TST_typename, Loc, PrevSpec, DiagID, T,
2763 Actions.getASTContext().getPrintingPolicy());
2764 DS.SetRangeEnd(Tok.getLocation());
2766 // There may be other declaration specifiers after this.
2768 } else if (II != Tok.getIdentifierInfo()) {
2769 // If no type was suggested, the correction is to a keyword
2770 Tok.setKind(II->getTokenID());
2771 // There may be other declaration specifiers after this.
2775 // Otherwise, the action had no suggestion for us. Mark this as an error.
2776 DS.SetTypeSpecError();
2777 DS.SetRangeEnd(Tok.getLocation());
2780 // Eat any following template arguments.
2781 if (IsTemplateName) {
2782 SourceLocation LAngle, RAngle;
2783 TemplateArgList Args;
2784 ParseTemplateIdAfterTemplateName(true, LAngle, Args, RAngle);
2787 // TODO: Could inject an invalid typedef decl in an enclosing scope to
2788 // avoid rippling error messages on subsequent uses of the same type,
2789 // could be useful if #include was forgotten.
2793 /// Determine the declaration specifier context from the declarator
2796 /// \param Context the declarator context, which is one of the
2797 /// DeclaratorContext enumerator values.
2798 Parser::DeclSpecContext
2799 Parser::getDeclSpecContextFromDeclaratorContext(DeclaratorContext Context) {
2800 if (Context == DeclaratorContext::MemberContext)
2801 return DeclSpecContext::DSC_class;
2802 if (Context == DeclaratorContext::FileContext)
2803 return DeclSpecContext::DSC_top_level;
2804 if (Context == DeclaratorContext::TemplateParamContext)
2805 return DeclSpecContext::DSC_template_param;
2806 if (Context == DeclaratorContext::TemplateArgContext ||
2807 Context == DeclaratorContext::TemplateTypeArgContext)
2808 return DeclSpecContext::DSC_template_type_arg;
2809 if (Context == DeclaratorContext::TrailingReturnContext ||
2810 Context == DeclaratorContext::TrailingReturnVarContext)
2811 return DeclSpecContext::DSC_trailing;
2812 if (Context == DeclaratorContext::AliasDeclContext ||
2813 Context == DeclaratorContext::AliasTemplateContext)
2814 return DeclSpecContext::DSC_alias_declaration;
2815 return DeclSpecContext::DSC_normal;
2818 /// ParseAlignArgument - Parse the argument to an alignment-specifier.
2820 /// FIXME: Simply returns an alignof() expression if the argument is a
2821 /// type. Ideally, the type should be propagated directly into Sema.
2824 /// [C11] constant-expression
2825 /// [C++0x] type-id ...[opt]
2826 /// [C++0x] assignment-expression ...[opt]
2827 ExprResult Parser::ParseAlignArgument(SourceLocation Start,
2828 SourceLocation &EllipsisLoc) {
2830 if (isTypeIdInParens()) {
2831 SourceLocation TypeLoc = Tok.getLocation();
2832 ParsedType Ty = ParseTypeName().get();
2833 SourceRange TypeRange(Start, Tok.getLocation());
2834 ER = Actions.ActOnUnaryExprOrTypeTraitExpr(TypeLoc, UETT_AlignOf, true,
2835 Ty.getAsOpaquePtr(), TypeRange);
2837 ER = ParseConstantExpression();
2839 if (getLangOpts().CPlusPlus11)
2840 TryConsumeToken(tok::ellipsis, EllipsisLoc);
2845 /// ParseAlignmentSpecifier - Parse an alignment-specifier, and add the
2846 /// attribute to Attrs.
2848 /// alignment-specifier:
2849 /// [C11] '_Alignas' '(' type-id ')'
2850 /// [C11] '_Alignas' '(' constant-expression ')'
2851 /// [C++11] 'alignas' '(' type-id ...[opt] ')'
2852 /// [C++11] 'alignas' '(' assignment-expression ...[opt] ')'
2853 void Parser::ParseAlignmentSpecifier(ParsedAttributes &Attrs,
2854 SourceLocation *EndLoc) {
2855 assert(Tok.isOneOf(tok::kw_alignas, tok::kw__Alignas) &&
2856 "Not an alignment-specifier!");
2858 IdentifierInfo *KWName = Tok.getIdentifierInfo();
2859 SourceLocation KWLoc = ConsumeToken();
2861 BalancedDelimiterTracker T(*this, tok::l_paren);
2862 if (T.expectAndConsume())
2865 SourceLocation EllipsisLoc;
2866 ExprResult ArgExpr = ParseAlignArgument(T.getOpenLocation(), EllipsisLoc);
2867 if (ArgExpr.isInvalid()) {
2874 *EndLoc = T.getCloseLocation();
2876 ArgsVector ArgExprs;
2877 ArgExprs.push_back(ArgExpr.get());
2878 Attrs.addNew(KWName, KWLoc, nullptr, KWLoc, ArgExprs.data(), 1,
2879 ParsedAttr::AS_Keyword, EllipsisLoc);
2882 /// Determine whether we're looking at something that might be a declarator
2883 /// in a simple-declaration. If it can't possibly be a declarator, maybe
2884 /// diagnose a missing semicolon after a prior tag definition in the decl
2887 /// \return \c true if an error occurred and this can't be any kind of
2890 Parser::DiagnoseMissingSemiAfterTagDefinition(DeclSpec &DS, AccessSpecifier AS,
2891 DeclSpecContext DSContext,
2892 LateParsedAttrList *LateAttrs) {
2893 assert(DS.hasTagDefinition() && "shouldn't call this");
2895 bool EnteringContext = (DSContext == DeclSpecContext::DSC_class ||
2896 DSContext == DeclSpecContext::DSC_top_level);
2898 if (getLangOpts().CPlusPlus &&
2899 Tok.isOneOf(tok::identifier, tok::coloncolon, tok::kw_decltype,
2900 tok::annot_template_id) &&
2901 TryAnnotateCXXScopeToken(EnteringContext)) {
2902 SkipMalformedDecl();
2906 bool HasScope = Tok.is(tok::annot_cxxscope);
2907 // Make a copy in case GetLookAheadToken invalidates the result of NextToken.
2908 Token AfterScope = HasScope ? NextToken() : Tok;
2910 // Determine whether the following tokens could possibly be a
2912 bool MightBeDeclarator = true;
2913 if (Tok.isOneOf(tok::kw_typename, tok::annot_typename)) {
2914 // A declarator-id can't start with 'typename'.
2915 MightBeDeclarator = false;
2916 } else if (AfterScope.is(tok::annot_template_id)) {
2917 // If we have a type expressed as a template-id, this cannot be a
2918 // declarator-id (such a type cannot be redeclared in a simple-declaration).
2919 TemplateIdAnnotation *Annot =
2920 static_cast<TemplateIdAnnotation *>(AfterScope.getAnnotationValue());
2921 if (Annot->Kind == TNK_Type_template)
2922 MightBeDeclarator = false;
2923 } else if (AfterScope.is(tok::identifier)) {
2924 const Token &Next = HasScope ? GetLookAheadToken(2) : NextToken();
2926 // These tokens cannot come after the declarator-id in a
2927 // simple-declaration, and are likely to come after a type-specifier.
2928 if (Next.isOneOf(tok::star, tok::amp, tok::ampamp, tok::identifier,
2929 tok::annot_cxxscope, tok::coloncolon)) {
2930 // Missing a semicolon.
2931 MightBeDeclarator = false;
2932 } else if (HasScope) {
2933 // If the declarator-id has a scope specifier, it must redeclare a
2934 // previously-declared entity. If that's a type (and this is not a
2935 // typedef), that's an error.
2937 Actions.RestoreNestedNameSpecifierAnnotation(
2938 Tok.getAnnotationValue(), Tok.getAnnotationRange(), SS);
2939 IdentifierInfo *Name = AfterScope.getIdentifierInfo();
2940 Sema::NameClassification Classification = Actions.ClassifyName(
2941 getCurScope(), SS, Name, AfterScope.getLocation(), Next,
2943 switch (Classification.getKind()) {
2944 case Sema::NC_Error:
2945 SkipMalformedDecl();
2948 case Sema::NC_Keyword:
2949 llvm_unreachable("typo correction is not possible here");
2952 case Sema::NC_TypeTemplate:
2953 case Sema::NC_UndeclaredNonType:
2954 case Sema::NC_UndeclaredTemplate:
2955 // Not a previously-declared non-type entity.
2956 MightBeDeclarator = false;
2959 case Sema::NC_Unknown:
2960 case Sema::NC_NonType:
2961 case Sema::NC_DependentNonType:
2962 case Sema::NC_ContextIndependentExpr:
2963 case Sema::NC_VarTemplate:
2964 case Sema::NC_FunctionTemplate:
2965 // Might be a redeclaration of a prior entity.
2971 if (MightBeDeclarator)
2974 const PrintingPolicy &PPol = Actions.getASTContext().getPrintingPolicy();
2975 Diag(PP.getLocForEndOfToken(DS.getRepAsDecl()->getEndLoc()),
2976 diag::err_expected_after)
2977 << DeclSpec::getSpecifierName(DS.getTypeSpecType(), PPol) << tok::semi;
2979 // Try to recover from the typo, by dropping the tag definition and parsing
2980 // the problematic tokens as a type.
2982 // FIXME: Split the DeclSpec into pieces for the standalone
2983 // declaration and pieces for the following declaration, instead
2984 // of assuming that all the other pieces attach to new declaration,
2985 // and call ParsedFreeStandingDeclSpec as appropriate.
2986 DS.ClearTypeSpecType();
2987 ParsedTemplateInfo NotATemplate;
2988 ParseDeclarationSpecifiers(DS, NotATemplate, AS, DSContext, LateAttrs);
2992 // Choose the apprpriate diagnostic error for why fixed point types are
2993 // disabled, set the previous specifier, and mark as invalid.
2994 static void SetupFixedPointError(const LangOptions &LangOpts,
2995 const char *&PrevSpec, unsigned &DiagID,
2997 assert(!LangOpts.FixedPoint);
2998 DiagID = diag::err_fixed_point_not_enabled;
2999 PrevSpec = ""; // Not used by diagnostic
3003 /// ParseDeclarationSpecifiers
3004 /// declaration-specifiers: [C99 6.7]
3005 /// storage-class-specifier declaration-specifiers[opt]
3006 /// type-specifier declaration-specifiers[opt]
3007 /// [C99] function-specifier declaration-specifiers[opt]
3008 /// [C11] alignment-specifier declaration-specifiers[opt]
3009 /// [GNU] attributes declaration-specifiers[opt]
3010 /// [Clang] '__module_private__' declaration-specifiers[opt]
3011 /// [ObjC1] '__kindof' declaration-specifiers[opt]
3013 /// storage-class-specifier: [C99 6.7.1]
3020 /// [C++11] 'thread_local'
3021 /// [C11] '_Thread_local'
3022 /// [GNU] '__thread'
3023 /// function-specifier: [C99 6.7.4]
3026 /// [C++] 'explicit'
3027 /// [OpenCL] '__kernel'
3028 /// 'friend': [C++ dcl.friend]
3029 /// 'constexpr': [C++0x dcl.constexpr]
3030 void Parser::ParseDeclarationSpecifiers(DeclSpec &DS,
3031 const ParsedTemplateInfo &TemplateInfo,
3033 DeclSpecContext DSContext,
3034 LateParsedAttrList *LateAttrs) {
3035 if (DS.getSourceRange().isInvalid()) {
3036 // Start the range at the current token but make the end of the range
3037 // invalid. This will make the entire range invalid unless we successfully
3039 DS.SetRangeStart(Tok.getLocation());
3040 DS.SetRangeEnd(SourceLocation());
3043 bool EnteringContext = (DSContext == DeclSpecContext::DSC_class ||
3044 DSContext == DeclSpecContext::DSC_top_level);
3045 bool AttrsLastTime = false;
3046 ParsedAttributesWithRange attrs(AttrFactory);
3047 // We use Sema's policy to get bool macros right.
3048 PrintingPolicy Policy = Actions.getPrintingPolicy();
3050 bool isInvalid = false;
3051 bool isStorageClass = false;
3052 const char *PrevSpec = nullptr;
3053 unsigned DiagID = 0;
3055 // This value needs to be set to the location of the last token if the last
3056 // token of the specifier is already consumed.
3057 SourceLocation ConsumedEnd;
3059 // HACK: MSVC doesn't consider _Atomic to be a keyword and its STL
3060 // implementation for VS2013 uses _Atomic as an identifier for one of the
3061 // classes in <atomic>.
3063 // A typedef declaration containing _Atomic<...> is among the places where
3064 // the class is used. If we are currently parsing such a declaration, treat
3065 // the token as an identifier.
3066 if (getLangOpts().MSVCCompat && Tok.is(tok::kw__Atomic) &&
3067 DS.getStorageClassSpec() == clang::DeclSpec::SCS_typedef &&
3068 !DS.hasTypeSpecifier() && GetLookAheadToken(1).is(tok::less))
3069 Tok.setKind(tok::identifier);
3071 SourceLocation Loc = Tok.getLocation();
3073 switch (Tok.getKind()) {
3077 ProhibitAttributes(attrs);
3079 // Reject C++11 attributes that appertain to decl specifiers as
3080 // we don't support any C++11 attributes that appertain to decl
3081 // specifiers. This also conforms to what g++ 4.8 is doing.
3082 ProhibitCXX11Attributes(attrs, diag::err_attribute_not_type_attr);
3084 DS.takeAttributesFrom(attrs);
3087 // If this is not a declaration specifier token, we're done reading decl
3088 // specifiers. First verify that DeclSpec's are consistent.
3089 DS.Finish(Actions, Policy);
3093 case tok::kw_alignas:
3094 if (!standardAttributesAllowed() || !isCXX11AttributeSpecifier())
3095 goto DoneWithDeclSpec;
3097 ProhibitAttributes(attrs);
3098 // FIXME: It would be good to recover by accepting the attributes,
3099 // but attempting to do that now would cause serious
3100 // madness in terms of diagnostics.
3102 attrs.Range = SourceRange();
3104 ParseCXX11Attributes(attrs);
3105 AttrsLastTime = true;
3108 case tok::code_completion: {
3109 Sema::ParserCompletionContext CCC = Sema::PCC_Namespace;
3110 if (DS.hasTypeSpecifier()) {
3111 bool AllowNonIdentifiers
3112 = (getCurScope()->getFlags() & (Scope::ControlScope |
3114 Scope::TemplateParamScope |
3115 Scope::FunctionPrototypeScope |
3116 Scope::AtCatchScope)) == 0;
3117 bool AllowNestedNameSpecifiers
3118 = DSContext == DeclSpecContext::DSC_top_level ||
3119 (DSContext == DeclSpecContext::DSC_class && DS.isFriendSpecified());
3121 Actions.CodeCompleteDeclSpec(getCurScope(), DS,
3122 AllowNonIdentifiers,
3123 AllowNestedNameSpecifiers);
3124 return cutOffParsing();
3127 if (getCurScope()->getFnParent() || getCurScope()->getBlockParent())
3128 CCC = Sema::PCC_LocalDeclarationSpecifiers;
3129 else if (TemplateInfo.Kind != ParsedTemplateInfo::NonTemplate)
3130 CCC = DSContext == DeclSpecContext::DSC_class ? Sema::PCC_MemberTemplate
3131 : Sema::PCC_Template;
3132 else if (DSContext == DeclSpecContext::DSC_class)
3133 CCC = Sema::PCC_Class;
3134 else if (CurParsedObjCImpl)
3135 CCC = Sema::PCC_ObjCImplementation;
3137 Actions.CodeCompleteOrdinaryName(getCurScope(), CCC);
3138 return cutOffParsing();
3141 case tok::coloncolon: // ::foo::bar
3142 // C++ scope specifier. Annotate and loop, or bail out on error.
3143 if (TryAnnotateCXXScopeToken(EnteringContext)) {
3144 if (!DS.hasTypeSpecifier())
3145 DS.SetTypeSpecError();
3146 goto DoneWithDeclSpec;
3148 if (Tok.is(tok::coloncolon)) // ::new or ::delete
3149 goto DoneWithDeclSpec;
3152 case tok::annot_cxxscope: {
3153 if (DS.hasTypeSpecifier() || DS.isTypeAltiVecVector())
3154 goto DoneWithDeclSpec;
3157 Actions.RestoreNestedNameSpecifierAnnotation(Tok.getAnnotationValue(),
3158 Tok.getAnnotationRange(),
3161 // We are looking for a qualified typename.
3162 Token Next = NextToken();
3163 if (Next.is(tok::annot_template_id) &&
3164 static_cast<TemplateIdAnnotation *>(Next.getAnnotationValue())
3165 ->Kind == TNK_Type_template) {
3166 // We have a qualified template-id, e.g., N::A<int>
3168 // If this would be a valid constructor declaration with template
3169 // arguments, we will reject the attempt to form an invalid type-id
3170 // referring to the injected-class-name when we annotate the token,
3171 // per C++ [class.qual]p2.
3173 // To improve diagnostics for this case, parse the declaration as a
3174 // constructor (and reject the extra template arguments later).
3175 TemplateIdAnnotation *TemplateId = takeTemplateIdAnnotation(Next);
3176 if ((DSContext == DeclSpecContext::DSC_top_level ||
3177 DSContext == DeclSpecContext::DSC_class) &&
3179 Actions.isCurrentClassName(*TemplateId->Name, getCurScope(), &SS) &&
3180 isConstructorDeclarator(/*Unqualified*/ false)) {
3181 // The user meant this to be an out-of-line constructor
3182 // definition, but template arguments are not allowed
3183 // there. Just allow this as a constructor; we'll
3184 // complain about it later.
3185 goto DoneWithDeclSpec;
3188 DS.getTypeSpecScope() = SS;
3189 ConsumeAnnotationToken(); // The C++ scope.
3190 assert(Tok.is(tok::annot_template_id) &&
3191 "ParseOptionalCXXScopeSpecifier not working");
3192 AnnotateTemplateIdTokenAsType();
3196 if (Next.is(tok::annot_typename)) {
3197 DS.getTypeSpecScope() = SS;
3198 ConsumeAnnotationToken(); // The C++ scope.
3199 if (Tok.getAnnotationValue()) {
3200 ParsedType T = getTypeAnnotation(Tok);
3201 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_typename,
3202 Tok.getAnnotationEndLoc(),
3203 PrevSpec, DiagID, T, Policy);
3208 DS.SetTypeSpecError();
3209 DS.SetRangeEnd(Tok.getAnnotationEndLoc());
3210 ConsumeAnnotationToken(); // The typename
3213 if (Next.isNot(tok::identifier))
3214 goto DoneWithDeclSpec;
3216 // Check whether this is a constructor declaration. If we're in a
3217 // context where the identifier could be a class name, and it has the
3218 // shape of a constructor declaration, process it as one.
3219 if ((DSContext == DeclSpecContext::DSC_top_level ||
3220 DSContext == DeclSpecContext::DSC_class) &&
3221 Actions.isCurrentClassName(*Next.getIdentifierInfo(), getCurScope(),
3223 isConstructorDeclarator(/*Unqualified*/ false))
3224 goto DoneWithDeclSpec;
3226 ParsedType TypeRep =
3227 Actions.getTypeName(*Next.getIdentifierInfo(), Next.getLocation(),
3228 getCurScope(), &SS, false, false, nullptr,
3229 /*IsCtorOrDtorName=*/false,
3230 /*WantNontrivialTypeSourceInfo=*/true,
3231 isClassTemplateDeductionContext(DSContext));
3233 // If the referenced identifier is not a type, then this declspec is
3234 // erroneous: We already checked about that it has no type specifier, and
3235 // C++ doesn't have implicit int. Diagnose it as a typo w.r.t. to the
3238 // Eat the scope spec so the identifier is current.
3239 ConsumeAnnotationToken();
3240 ParsedAttributesWithRange Attrs(AttrFactory);
3241 if (ParseImplicitInt(DS, &SS, TemplateInfo, AS, DSContext, Attrs)) {
3242 if (!Attrs.empty()) {
3243 AttrsLastTime = true;
3244 attrs.takeAllFrom(Attrs);
3248 goto DoneWithDeclSpec;
3251 DS.getTypeSpecScope() = SS;
3252 ConsumeAnnotationToken(); // The C++ scope.
3254 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_typename, Loc, PrevSpec,
3255 DiagID, TypeRep, Policy);
3259 DS.SetRangeEnd(Tok.getLocation());
3260 ConsumeToken(); // The typename.
3265 case tok::annot_typename: {
3266 // If we've previously seen a tag definition, we were almost surely
3267 // missing a semicolon after it.
3268 if (DS.hasTypeSpecifier() && DS.hasTagDefinition())
3269 goto DoneWithDeclSpec;
3271 if (Tok.getAnnotationValue()) {
3272 ParsedType T = getTypeAnnotation(Tok);
3273 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_typename, Loc, PrevSpec,
3276 DS.SetTypeSpecError();
3281 DS.SetRangeEnd(Tok.getAnnotationEndLoc());
3282 ConsumeAnnotationToken(); // The typename
3287 case tok::kw___is_signed:
3288 // GNU libstdc++ 4.4 uses __is_signed as an identifier, but Clang
3289 // typically treats it as a trait. If we see __is_signed as it appears
3290 // in libstdc++, e.g.,
3292 // static const bool __is_signed;
3294 // then treat __is_signed as an identifier rather than as a keyword.
3295 if (DS.getTypeSpecType() == TST_bool &&
3296 DS.getTypeQualifiers() == DeclSpec::TQ_const &&
3297 DS.getStorageClassSpec() == DeclSpec::SCS_static)
3298 TryKeywordIdentFallback(true);
3300 // We're done with the declaration-specifiers.
3301 goto DoneWithDeclSpec;
3304 case tok::kw___super:
3305 case tok::kw_decltype:
3306 case tok::identifier: {
3307 // This identifier can only be a typedef name if we haven't already seen
3308 // a type-specifier. Without this check we misparse:
3309 // typedef int X; struct Y { short X; }; as 'short int'.
3310 if (DS.hasTypeSpecifier())
3311 goto DoneWithDeclSpec;
3313 // If the token is an identifier named "__declspec" and Microsoft
3314 // extensions are not enabled, it is likely that there will be cascading
3315 // parse errors if this really is a __declspec attribute. Attempt to
3316 // recognize that scenario and recover gracefully.
3317 if (!getLangOpts().DeclSpecKeyword && Tok.is(tok::identifier) &&
3318 Tok.getIdentifierInfo()->getName().equals("__declspec")) {
3319 Diag(Loc, diag::err_ms_attributes_not_enabled);
3321 // The next token should be an open paren. If it is, eat the entire
3322 // attribute declaration and continue.
3323 if (NextToken().is(tok::l_paren)) {
3324 // Consume the __declspec identifier.
3327 // Eat the parens and everything between them.
3328 BalancedDelimiterTracker T(*this, tok::l_paren);
3329 if (T.consumeOpen()) {
3330 assert(false && "Not a left paren?");
3338 // In C++, check to see if this is a scope specifier like foo::bar::, if
3339 // so handle it as such. This is important for ctor parsing.
3340 if (getLangOpts().CPlusPlus) {
3341 if (TryAnnotateCXXScopeToken(EnteringContext)) {
3342 DS.SetTypeSpecError();
3343 goto DoneWithDeclSpec;
3345 if (!Tok.is(tok::identifier))
3349 // Check for need to substitute AltiVec keyword tokens.
3350 if (TryAltiVecToken(DS, Loc, PrevSpec, DiagID, isInvalid))
3353 // [AltiVec] 2.2: [If the 'vector' specifier is used] The syntax does not
3354 // allow the use of a typedef name as a type specifier.
3355 if (DS.isTypeAltiVecVector())
3356 goto DoneWithDeclSpec;
3358 if (DSContext == DeclSpecContext::DSC_objc_method_result &&
3359 isObjCInstancetype()) {
3360 ParsedType TypeRep = Actions.ActOnObjCInstanceType(Loc);
3362 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_typename, Loc, PrevSpec,
3363 DiagID, TypeRep, Policy);
3367 DS.SetRangeEnd(Loc);
3372 // If we're in a context where the identifier could be a class name,
3373 // check whether this is a constructor declaration.
3374 if (getLangOpts().CPlusPlus && DSContext == DeclSpecContext::DSC_class &&
3375 Actions.isCurrentClassName(*Tok.getIdentifierInfo(), getCurScope()) &&
3376 isConstructorDeclarator(/*Unqualified*/true))
3377 goto DoneWithDeclSpec;
3379 ParsedType TypeRep = Actions.getTypeName(
3380 *Tok.getIdentifierInfo(), Tok.getLocation(), getCurScope(), nullptr,
3381 false, false, nullptr, false, false,
3382 isClassTemplateDeductionContext(DSContext));
3384 // If this is not a typedef name, don't parse it as part of the declspec,
3385 // it must be an implicit int or an error.
3387 ParsedAttributesWithRange Attrs(AttrFactory);
3388 if (ParseImplicitInt(DS, nullptr, TemplateInfo, AS, DSContext, Attrs)) {
3389 if (!Attrs.empty()) {
3390 AttrsLastTime = true;
3391 attrs.takeAllFrom(Attrs);
3395 goto DoneWithDeclSpec;
3398 // Likewise, if this is a context where the identifier could be a template
3399 // name, check whether this is a deduction guide declaration.
3400 if (getLangOpts().CPlusPlus17 &&
3401 (DSContext == DeclSpecContext::DSC_class ||
3402 DSContext == DeclSpecContext::DSC_top_level) &&
3403 Actions.isDeductionGuideName(getCurScope(), *Tok.getIdentifierInfo(),
3404 Tok.getLocation()) &&
3405 isConstructorDeclarator(/*Unqualified*/ true,
3406 /*DeductionGuide*/ true))
3407 goto DoneWithDeclSpec;
3409 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_typename, Loc, PrevSpec,
3410 DiagID, TypeRep, Policy);
3414 DS.SetRangeEnd(Tok.getLocation());
3415 ConsumeToken(); // The identifier
3417 // Objective-C supports type arguments and protocol references
3418 // following an Objective-C object or object pointer
3419 // type. Handle either one of them.
3420 if (Tok.is(tok::less) && getLangOpts().ObjC) {
3421 SourceLocation NewEndLoc;
3422 TypeResult NewTypeRep = parseObjCTypeArgsAndProtocolQualifiers(
3423 Loc, TypeRep, /*consumeLastToken=*/true,
3425 if (NewTypeRep.isUsable()) {
3426 DS.UpdateTypeRep(NewTypeRep.get());
3427 DS.SetRangeEnd(NewEndLoc);
3431 // Need to support trailing type qualifiers (e.g. "id<p> const").
3432 // If a type specifier follows, it will be diagnosed elsewhere.
3437 case tok::annot_template_id: {
3438 TemplateIdAnnotation *TemplateId = takeTemplateIdAnnotation(Tok);
3439 if (TemplateId->Kind != TNK_Type_template &&
3440 TemplateId->Kind != TNK_Undeclared_template) {
3441 // This template-id does not refer to a type name, so we're
3442 // done with the type-specifiers.
3443 goto DoneWithDeclSpec;
3446 // If we're in a context where the template-id could be a
3447 // constructor name or specialization, check whether this is a
3448 // constructor declaration.
3449 if (getLangOpts().CPlusPlus && DSContext == DeclSpecContext::DSC_class &&
3450 Actions.isCurrentClassName(*TemplateId->Name, getCurScope()) &&
3451 isConstructorDeclarator(TemplateId->SS.isEmpty()))
3452 goto DoneWithDeclSpec;
3454 // Turn the template-id annotation token into a type annotation
3455 // token, then try again to parse it as a type-specifier.
3456 AnnotateTemplateIdTokenAsType();
3460 // GNU attributes support.
3461 case tok::kw___attribute:
3462 ParseGNUAttributes(DS.getAttributes(), nullptr, LateAttrs);
3465 // Microsoft declspec support.
3466 case tok::kw___declspec:
3467 ParseMicrosoftDeclSpecs(DS.getAttributes());
3470 // Microsoft single token adornments.
3471 case tok::kw___forceinline: {
3472 isInvalid = DS.setFunctionSpecForceInline(Loc, PrevSpec, DiagID);
3473 IdentifierInfo *AttrName = Tok.getIdentifierInfo();
3474 SourceLocation AttrNameLoc = Tok.getLocation();
3475 DS.getAttributes().addNew(AttrName, AttrNameLoc, nullptr, AttrNameLoc,
3476 nullptr, 0, ParsedAttr::AS_Keyword);
3480 case tok::kw___unaligned:
3481 isInvalid = DS.SetTypeQual(DeclSpec::TQ_unaligned, Loc, PrevSpec, DiagID,
3485 case tok::kw___sptr:
3486 case tok::kw___uptr:
3487 case tok::kw___ptr64:
3488 case tok::kw___ptr32:
3490 case tok::kw___cdecl:
3491 case tok::kw___stdcall:
3492 case tok::kw___fastcall:
3493 case tok::kw___thiscall:
3494 case tok::kw___regcall:
3495 case tok::kw___vectorcall:
3496 ParseMicrosoftTypeAttributes(DS.getAttributes());
3499 // Borland single token adornments.
3500 case tok::kw___pascal:
3501 ParseBorlandTypeAttributes(DS.getAttributes());
3504 // OpenCL single token adornments.
3505 case tok::kw___kernel:
3506 ParseOpenCLKernelAttributes(DS.getAttributes());
3509 // Nullability type specifiers.
3510 case tok::kw__Nonnull:
3511 case tok::kw__Nullable:
3512 case tok::kw__Null_unspecified:
3513 ParseNullabilityTypeSpecifiers(DS.getAttributes());
3516 // Objective-C 'kindof' types.
3517 case tok::kw___kindof:
3518 DS.getAttributes().addNew(Tok.getIdentifierInfo(), Loc, nullptr, Loc,
3519 nullptr, 0, ParsedAttr::AS_Keyword);
3520 (void)ConsumeToken();
3523 // storage-class-specifier
3524 case tok::kw_typedef:
3525 isInvalid = DS.SetStorageClassSpec(Actions, DeclSpec::SCS_typedef, Loc,
3526 PrevSpec, DiagID, Policy);
3527 isStorageClass = true;
3529 case tok::kw_extern:
3530 if (DS.getThreadStorageClassSpec() == DeclSpec::TSCS___thread)
3531 Diag(Tok, diag::ext_thread_before) << "extern";
3532 isInvalid = DS.SetStorageClassSpec(Actions, DeclSpec::SCS_extern, Loc,
3533 PrevSpec, DiagID, Policy);
3534 isStorageClass = true;
3536 case tok::kw___private_extern__:
3537 isInvalid = DS.SetStorageClassSpec(Actions, DeclSpec::SCS_private_extern,
3538 Loc, PrevSpec, DiagID, Policy);
3539 isStorageClass = true;
3541 case tok::kw_static:
3542 if (DS.getThreadStorageClassSpec() == DeclSpec::TSCS___thread)
3543 Diag(Tok, diag::ext_thread_before) << "static";
3544 isInvalid = DS.SetStorageClassSpec(Actions, DeclSpec::SCS_static, Loc,
3545 PrevSpec, DiagID, Policy);
3546 isStorageClass = true;
3549 if (getLangOpts().CPlusPlus11) {
3550 if (isKnownToBeTypeSpecifier(GetLookAheadToken(1))) {
3551 isInvalid = DS.SetStorageClassSpec(Actions, DeclSpec::SCS_auto, Loc,
3552 PrevSpec, DiagID, Policy);
3554 Diag(Tok, diag::ext_auto_storage_class)
3555 << FixItHint::CreateRemoval(DS.getStorageClassSpecLoc());
3557 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_auto, Loc, PrevSpec,
3560 isInvalid = DS.SetStorageClassSpec(Actions, DeclSpec::SCS_auto, Loc,
3561 PrevSpec, DiagID, Policy);
3562 isStorageClass = true;
3564 case tok::kw___auto_type:
3565 Diag(Tok, diag::ext_auto_type);
3566 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_auto_type, Loc, PrevSpec,
3569 case tok::kw_register:
3570 isInvalid = DS.SetStorageClassSpec(Actions, DeclSpec::SCS_register, Loc,
3571 PrevSpec, DiagID, Policy);
3572 isStorageClass = true;
3574 case tok::kw_mutable:
3575 isInvalid = DS.SetStorageClassSpec(Actions, DeclSpec::SCS_mutable, Loc,
3576 PrevSpec, DiagID, Policy);
3577 isStorageClass = true;
3579 case tok::kw___thread:
3580 isInvalid = DS.SetStorageClassSpecThread(DeclSpec::TSCS___thread, Loc,
3582 isStorageClass = true;
3584 case tok::kw_thread_local:
3585 isInvalid = DS.SetStorageClassSpecThread(DeclSpec::TSCS_thread_local, Loc,
3587 isStorageClass = true;
3589 case tok::kw__Thread_local:
3590 if (!getLangOpts().C11)
3591 Diag(Tok, diag::ext_c11_feature) << Tok.getName();
3592 isInvalid = DS.SetStorageClassSpecThread(DeclSpec::TSCS__Thread_local,
3593 Loc, PrevSpec, DiagID);
3594 isStorageClass = true;
3597 // function-specifier
3598 case tok::kw_inline:
3599 isInvalid = DS.setFunctionSpecInline(Loc, PrevSpec, DiagID);
3601 case tok::kw_virtual:
3602 // C++ for OpenCL does not allow virtual function qualifier, to avoid
3603 // function pointers restricted in OpenCL v2.0 s6.9.a.
3604 if (getLangOpts().OpenCLCPlusPlus) {
3605 DiagID = diag::err_openclcxx_virtual_function;
3606 PrevSpec = Tok.getIdentifierInfo()->getNameStart();
3610 isInvalid = DS.setFunctionSpecVirtual(Loc, PrevSpec, DiagID);
3613 case tok::kw_explicit: {
3614 SourceLocation ExplicitLoc = Loc;
3615 SourceLocation CloseParenLoc;
3616 ExplicitSpecifier ExplicitSpec(nullptr, ExplicitSpecKind::ResolvedTrue);
3617 ConsumedEnd = ExplicitLoc;
3618 ConsumeToken(); // kw_explicit
3619 if (Tok.is(tok::l_paren)) {
3620 if (getLangOpts().CPlusPlus2a) {
3621 ExprResult ExplicitExpr(static_cast<Expr *>(nullptr));
3622 BalancedDelimiterTracker Tracker(*this, tok::l_paren);
3623 Tracker.consumeOpen();
3624 ExplicitExpr = ParseConstantExpression();
3625 ConsumedEnd = Tok.getLocation();
3626 if (ExplicitExpr.isUsable()) {
3627 CloseParenLoc = Tok.getLocation();
3628 Tracker.consumeClose();
3630 Actions.ActOnExplicitBoolSpecifier(ExplicitExpr.get());
3632 Tracker.skipToEnd();
3634 Diag(Tok.getLocation(), diag::warn_cxx2a_compat_explicit_bool);
3636 isInvalid = DS.setFunctionSpecExplicit(ExplicitLoc, PrevSpec, DiagID,
3637 ExplicitSpec, CloseParenLoc);
3640 case tok::kw__Noreturn:
3641 if (!getLangOpts().C11)
3642 Diag(Tok, diag::ext_c11_feature) << Tok.getName();
3643 isInvalid = DS.setFunctionSpecNoreturn(Loc, PrevSpec, DiagID);
3646 // alignment-specifier
3647 case tok::kw__Alignas:
3648 if (!getLangOpts().C11)
3649 Diag(Tok, diag::ext_c11_feature) << Tok.getName();
3650 ParseAlignmentSpecifier(DS.getAttributes());
3654 case tok::kw_friend:
3655 if (DSContext == DeclSpecContext::DSC_class)
3656 isInvalid = DS.SetFriendSpec(Loc, PrevSpec, DiagID);
3658 PrevSpec = ""; // not actually used by the diagnostic
3659 DiagID = diag::err_friend_invalid_in_context;
3665 case tok::kw___module_private__:
3666 isInvalid = DS.setModulePrivateSpec(Loc, PrevSpec, DiagID);
3669 // constexpr, consteval, constinit specifiers
3670 case tok::kw_constexpr:
3671 isInvalid = DS.SetConstexprSpec(CSK_constexpr, Loc, PrevSpec, DiagID);
3673 case tok::kw_consteval:
3674 isInvalid = DS.SetConstexprSpec(CSK_consteval, Loc, PrevSpec, DiagID);
3676 case tok::kw_constinit:
3677 isInvalid = DS.SetConstexprSpec(CSK_constinit, Loc, PrevSpec, DiagID);
3682 isInvalid = DS.SetTypeSpecWidth(DeclSpec::TSW_short, Loc, PrevSpec,
3686 if (DS.getTypeSpecWidth() != DeclSpec::TSW_long)
3687 isInvalid = DS.SetTypeSpecWidth(DeclSpec::TSW_long, Loc, PrevSpec,
3690 isInvalid = DS.SetTypeSpecWidth(DeclSpec::TSW_longlong, Loc, PrevSpec,
3693 case tok::kw___int64:
3694 isInvalid = DS.SetTypeSpecWidth(DeclSpec::TSW_longlong, Loc, PrevSpec,
3697 case tok::kw_signed:
3698 isInvalid = DS.SetTypeSpecSign(DeclSpec::TSS_signed, Loc, PrevSpec,
3701 case tok::kw_unsigned:
3702 isInvalid = DS.SetTypeSpecSign(DeclSpec::TSS_unsigned, Loc, PrevSpec,
3705 case tok::kw__Complex:
3706 if (!getLangOpts().C99)
3707 Diag(Tok, diag::ext_c99_feature) << Tok.getName();
3708 isInvalid = DS.SetTypeSpecComplex(DeclSpec::TSC_complex, Loc, PrevSpec,
3711 case tok::kw__Imaginary:
3712 if (!getLangOpts().C99)
3713 Diag(Tok, diag::ext_c99_feature) << Tok.getName();
3714 isInvalid = DS.SetTypeSpecComplex(DeclSpec::TSC_imaginary, Loc, PrevSpec,
3718 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_void, Loc, PrevSpec,
3722 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_char, Loc, PrevSpec,
3726 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_int, Loc, PrevSpec,
3729 case tok::kw___int128:
3730 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_int128, Loc, PrevSpec,
3734 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_half, Loc, PrevSpec,
3738 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_float, Loc, PrevSpec,
3741 case tok::kw_double:
3742 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_double, Loc, PrevSpec,
3745 case tok::kw__Float16:
3746 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_float16, Loc, PrevSpec,
3749 case tok::kw__Accum:
3750 if (!getLangOpts().FixedPoint) {
3751 SetupFixedPointError(getLangOpts(), PrevSpec, DiagID, isInvalid);
3753 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_accum, Loc, PrevSpec,
3757 case tok::kw__Fract:
3758 if (!getLangOpts().FixedPoint) {
3759 SetupFixedPointError(getLangOpts(), PrevSpec, DiagID, isInvalid);
3761 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_fract, Loc, PrevSpec,
3766 if (!getLangOpts().FixedPoint) {
3767 SetupFixedPointError(getLangOpts(), PrevSpec, DiagID, isInvalid);
3769 isInvalid = DS.SetTypeSpecSat(Loc, PrevSpec, DiagID);
3772 case tok::kw___float128:
3773 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_float128, Loc, PrevSpec,
3776 case tok::kw_wchar_t:
3777 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_wchar, Loc, PrevSpec,
3780 case tok::kw_char8_t:
3781 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_char8, Loc, PrevSpec,
3784 case tok::kw_char16_t:
3785 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_char16, Loc, PrevSpec,
3788 case tok::kw_char32_t:
3789 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_char32, Loc, PrevSpec,
3794 if (Tok.is(tok::kw__Bool) && !getLangOpts().C99)
3795 Diag(Tok, diag::ext_c99_feature) << Tok.getName();
3797 if (Tok.is(tok::kw_bool) &&
3798 DS.getTypeSpecType() != DeclSpec::TST_unspecified &&
3799 DS.getStorageClassSpec() == DeclSpec::SCS_typedef) {
3800 PrevSpec = ""; // Not used by the diagnostic.
3801 DiagID = diag::err_bool_redeclaration;
3802 // For better error recovery.
3803 Tok.setKind(tok::identifier);
3806 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_bool, Loc, PrevSpec,
3810 case tok::kw__Decimal32:
3811 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_decimal32, Loc, PrevSpec,
3814 case tok::kw__Decimal64:
3815 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_decimal64, Loc, PrevSpec,
3818 case tok::kw__Decimal128:
3819 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_decimal128, Loc, PrevSpec,
3822 case tok::kw___vector:
3823 isInvalid = DS.SetTypeAltiVecVector(true, Loc, PrevSpec, DiagID, Policy);
3825 case tok::kw___pixel:
3826 isInvalid = DS.SetTypeAltiVecPixel(true, Loc, PrevSpec, DiagID, Policy);
3828 case tok::kw___bool:
3829 isInvalid = DS.SetTypeAltiVecBool(true, Loc, PrevSpec, DiagID, Policy);
3832 if (!getLangOpts().OpenCL || (getLangOpts().OpenCLVersion < 200 &&
3833 !getLangOpts().OpenCLCPlusPlus)) {
3834 // OpenCL 2.0 defined this keyword. OpenCL 1.2 and earlier should
3835 // support the "pipe" word as identifier.
3836 Tok.getIdentifierInfo()->revertTokenIDToIdentifier();
3837 goto DoneWithDeclSpec;
3839 isInvalid = DS.SetTypePipe(true, Loc, PrevSpec, DiagID, Policy);
3841 #define GENERIC_IMAGE_TYPE(ImgType, Id) \
3842 case tok::kw_##ImgType##_t: \
3843 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_##ImgType##_t, Loc, PrevSpec, \
3846 #include "clang/Basic/OpenCLImageTypes.def"
3847 case tok::kw___unknown_anytype:
3848 isInvalid = DS.SetTypeSpecType(TST_unknown_anytype, Loc,
3849 PrevSpec, DiagID, Policy);
3854 case tok::kw_struct:
3855 case tok::kw___interface:
3856 case tok::kw_union: {
3857 tok::TokenKind Kind = Tok.getKind();
3860 // These are attributes following class specifiers.
3861 // To produce better diagnostic, we parse them when
3862 // parsing class specifier.
3863 ParsedAttributesWithRange Attributes(AttrFactory);
3864 ParseClassSpecifier(Kind, Loc, DS, TemplateInfo, AS,
3865 EnteringContext, DSContext, Attributes);
3867 // If there are attributes following class specifier,
3868 // take them over and handle them here.
3869 if (!Attributes.empty()) {
3870 AttrsLastTime = true;
3871 attrs.takeAllFrom(Attributes);
3879 ParseEnumSpecifier(Loc, DS, TemplateInfo, AS, DSContext);
3884 isInvalid = DS.SetTypeQual(DeclSpec::TQ_const, Loc, PrevSpec, DiagID,
3887 case tok::kw_volatile:
3888 isInvalid = DS.SetTypeQual(DeclSpec::TQ_volatile, Loc, PrevSpec, DiagID,
3891 case tok::kw_restrict:
3892 isInvalid = DS.SetTypeQual(DeclSpec::TQ_restrict, Loc, PrevSpec, DiagID,
3896 // C++ typename-specifier:
3897 case tok::kw_typename:
3898 if (TryAnnotateTypeOrScopeToken()) {
3899 DS.SetTypeSpecError();
3900 goto DoneWithDeclSpec;
3902 if (!Tok.is(tok::kw_typename))
3906 // GNU typeof support.
3907 case tok::kw_typeof:
3908 ParseTypeofSpecifier(DS);
3911 case tok::annot_decltype:
3912 ParseDecltypeSpecifier(DS);
3915 case tok::annot_pragma_pack:
3919 case tok::annot_pragma_ms_pragma:
3920 HandlePragmaMSPragma();
3923 case tok::annot_pragma_ms_vtordisp:
3924 HandlePragmaMSVtorDisp();
3927 case tok::annot_pragma_ms_pointers_to_members:
3928 HandlePragmaMSPointersToMembers();
3931 case tok::kw___underlying_type:
3932 ParseUnderlyingTypeSpecifier(DS);
3935 case tok::kw__Atomic:
3937 // If the _Atomic keyword is immediately followed by a left parenthesis,
3938 // it is interpreted as a type specifier (with a type name), not as a
3940 if (!getLangOpts().C11)
3941 Diag(Tok, diag::ext_c11_feature) << Tok.getName();
3943 if (NextToken().is(tok::l_paren)) {
3944 ParseAtomicSpecifier(DS);
3947 isInvalid = DS.SetTypeQual(DeclSpec::TQ_atomic, Loc, PrevSpec, DiagID,
3951 // OpenCL address space qualifiers:
3952 case tok::kw___generic:
3953 // generic address space is introduced only in OpenCL v2.0
3954 // see OpenCL C Spec v2.0 s6.5.5
3955 if (Actions.getLangOpts().OpenCLVersion < 200 &&
3956 !Actions.getLangOpts().OpenCLCPlusPlus) {
3957 DiagID = diag::err_opencl_unknown_type_specifier;
3958 PrevSpec = Tok.getIdentifierInfo()->getNameStart();
3963 case tok::kw_private:
3964 // It's fine (but redundant) to check this for __generic on the
3965 // fallthrough path; we only form the __generic token in OpenCL mode.
3966 if (!getLangOpts().OpenCL)
3967 goto DoneWithDeclSpec;
3969 case tok::kw___private:
3970 case tok::kw___global:
3971 case tok::kw___local:
3972 case tok::kw___constant:
3973 // OpenCL access qualifiers:
3974 case tok::kw___read_only:
3975 case tok::kw___write_only:
3976 case tok::kw___read_write:
3977 ParseOpenCLQualifiers(DS.getAttributes());
3981 // GCC ObjC supports types like "<SomeProtocol>" as a synonym for
3982 // "id<SomeProtocol>". This is hopelessly old fashioned and dangerous,
3983 // but we support it.
3984 if (DS.hasTypeSpecifier() || !getLangOpts().ObjC)
3985 goto DoneWithDeclSpec;
3987 SourceLocation StartLoc = Tok.getLocation();
3988 SourceLocation EndLoc;
3989 TypeResult Type = parseObjCProtocolQualifierType(EndLoc);
3990 if (Type.isUsable()) {
3991 if (DS.SetTypeSpecType(DeclSpec::TST_typename, StartLoc, StartLoc,
3992 PrevSpec, DiagID, Type.get(),
3993 Actions.getASTContext().getPrintingPolicy()))
3994 Diag(StartLoc, DiagID) << PrevSpec;
3996 DS.SetRangeEnd(EndLoc);
3998 DS.SetTypeSpecError();
4001 // Need to support trailing type qualifiers (e.g. "id<p> const").
4002 // If a type specifier follows, it will be diagnosed elsewhere.
4006 DS.SetRangeEnd(ConsumedEnd.isValid() ? ConsumedEnd : Tok.getLocation());
4008 // If the specifier wasn't legal, issue a diagnostic.
4010 assert(PrevSpec && "Method did not return previous specifier!");
4013 if (DiagID == diag::ext_duplicate_declspec ||
4014 DiagID == diag::ext_warn_duplicate_declspec ||
4015 DiagID == diag::err_duplicate_declspec)
4016 Diag(Loc, DiagID) << PrevSpec
4017 << FixItHint::CreateRemoval(
4018 SourceRange(Loc, DS.getEndLoc()));
4019 else if (DiagID == diag::err_opencl_unknown_type_specifier) {
4020 Diag(Loc, DiagID) << getLangOpts().OpenCLCPlusPlus
4021 << getLangOpts().getOpenCLVersionTuple().getAsString()
4022 << PrevSpec << isStorageClass;
4024 Diag(Loc, DiagID) << PrevSpec;
4027 if (DiagID != diag::err_bool_redeclaration && ConsumedEnd.isInvalid())
4028 // After an error the next token can be an annotation token.
4031 AttrsLastTime = false;
4035 /// ParseStructDeclaration - Parse a struct declaration without the terminating
4038 /// Note that a struct declaration refers to a declaration in a struct,
4039 /// not to the declaration of a struct.
4041 /// struct-declaration:
4042 /// [C2x] attributes-specifier-seq[opt]
4043 /// specifier-qualifier-list struct-declarator-list
4044 /// [GNU] __extension__ struct-declaration
4045 /// [GNU] specifier-qualifier-list
4046 /// struct-declarator-list:
4047 /// struct-declarator
4048 /// struct-declarator-list ',' struct-declarator
4049 /// [GNU] struct-declarator-list ',' attributes[opt] struct-declarator
4050 /// struct-declarator:
4052 /// [GNU] declarator attributes[opt]
4053 /// declarator[opt] ':' constant-expression
4054 /// [GNU] declarator[opt] ':' constant-expression attributes[opt]
4056 void Parser::ParseStructDeclaration(
4057 ParsingDeclSpec &DS,
4058 llvm::function_ref<void(ParsingFieldDeclarator &)> FieldsCallback) {
4060 if (Tok.is(tok::kw___extension__)) {
4061 // __extension__ silences extension warnings in the subexpression.
4062 ExtensionRAIIObject O(Diags); // Use RAII to do this.
4064 return ParseStructDeclaration(DS, FieldsCallback);
4067 // Parse leading attributes.
4068 ParsedAttributesWithRange Attrs(AttrFactory);
4069 MaybeParseCXX11Attributes(Attrs);
4070 DS.takeAttributesFrom(Attrs);
4072 // Parse the common specifier-qualifiers-list piece.
4073 ParseSpecifierQualifierList(DS);
4075 // If there are no declarators, this is a free-standing declaration
4076 // specifier. Let the actions module cope with it.
4077 if (Tok.is(tok::semi)) {
4078 RecordDecl *AnonRecord = nullptr;
4079 Decl *TheDecl = Actions.ParsedFreeStandingDeclSpec(getCurScope(), AS_none,
4081 assert(!AnonRecord && "Did not expect anonymous struct or union here");
4082 DS.complete(TheDecl);
4086 // Read struct-declarators until we find the semicolon.
4087 bool FirstDeclarator = true;
4088 SourceLocation CommaLoc;
4090 ParsingFieldDeclarator DeclaratorInfo(*this, DS);
4091 DeclaratorInfo.D.setCommaLoc(CommaLoc);
4093 // Attributes are only allowed here on successive declarators.
4094 if (!FirstDeclarator)
4095 MaybeParseGNUAttributes(DeclaratorInfo.D);
4097 /// struct-declarator: declarator
4098 /// struct-declarator: declarator[opt] ':' constant-expression
4099 if (Tok.isNot(tok::colon)) {
4100 // Don't parse FOO:BAR as if it were a typo for FOO::BAR.
4101 ColonProtectionRAIIObject X(*this);
4102 ParseDeclarator(DeclaratorInfo.D);
4104 DeclaratorInfo.D.SetIdentifier(nullptr, Tok.getLocation());
4106 if (TryConsumeToken(tok::colon)) {
4107 ExprResult Res(ParseConstantExpression());
4108 if (Res.isInvalid())
4109 SkipUntil(tok::semi, StopBeforeMatch);
4111 DeclaratorInfo.BitfieldSize = Res.get();
4114 // If attributes exist after the declarator, parse them.
4115 MaybeParseGNUAttributes(DeclaratorInfo.D);
4117 // We're done with this declarator; invoke the callback.
4118 FieldsCallback(DeclaratorInfo);
4120 // If we don't have a comma, it is either the end of the list (a ';')
4121 // or an error, bail out.
4122 if (!TryConsumeToken(tok::comma, CommaLoc))
4125 FirstDeclarator = false;
4129 /// ParseStructUnionBody
4130 /// struct-contents:
4131 /// struct-declaration-list
4133 /// [GNU] "struct-declaration-list" without terminatoring ';'
4134 /// struct-declaration-list:
4135 /// struct-declaration
4136 /// struct-declaration-list struct-declaration
4137 /// [OBC] '@' 'defs' '(' class-name ')'
4139 void Parser::ParseStructUnionBody(SourceLocation RecordLoc,
4140 DeclSpec::TST TagType, Decl *TagDecl) {
4141 PrettyDeclStackTraceEntry CrashInfo(Actions.Context, TagDecl, RecordLoc,
4142 "parsing struct/union body");
4143 assert(!getLangOpts().CPlusPlus && "C++ declarations not supported");
4145 BalancedDelimiterTracker T(*this, tok::l_brace);
4146 if (T.consumeOpen())
4149 ParseScope StructScope(this, Scope::ClassScope|Scope::DeclScope);
4150 Actions.ActOnTagStartDefinition(getCurScope(), TagDecl);
4152 SmallVector<Decl *, 32> FieldDecls;
4154 // While we still have something to read, read the declarations in the struct.
4155 while (!tryParseMisplacedModuleImport() && Tok.isNot(tok::r_brace) &&
4156 Tok.isNot(tok::eof)) {
4157 // Each iteration of this loop reads one struct-declaration.
4159 // Check for extraneous top-level semicolon.
4160 if (Tok.is(tok::semi)) {
4161 ConsumeExtraSemi(InsideStruct, TagType);
4165 // Parse _Static_assert declaration.
4166 if (Tok.is(tok::kw__Static_assert)) {
4167 SourceLocation DeclEnd;
4168 ParseStaticAssertDeclaration(DeclEnd);
4172 if (Tok.is(tok::annot_pragma_pack)) {
4177 if (Tok.is(tok::annot_pragma_align)) {
4178 HandlePragmaAlign();
4182 if (Tok.is(tok::annot_pragma_openmp)) {
4183 // Result can be ignored, because it must be always empty.
4184 AccessSpecifier AS = AS_none;
4185 ParsedAttributesWithRange Attrs(AttrFactory);
4186 (void)ParseOpenMPDeclarativeDirectiveWithExtDecl(AS, Attrs);
4190 if (tok::isPragmaAnnotation(Tok.getKind())) {
4191 Diag(Tok.getLocation(), diag::err_pragma_misplaced_in_decl)
4192 << DeclSpec::getSpecifierName(
4193 TagType, Actions.getASTContext().getPrintingPolicy());
4194 ConsumeAnnotationToken();
4198 if (!Tok.is(tok::at)) {
4199 auto CFieldCallback = [&](ParsingFieldDeclarator &FD) {
4200 // Install the declarator into the current TagDecl.
4202 Actions.ActOnField(getCurScope(), TagDecl,
4203 FD.D.getDeclSpec().getSourceRange().getBegin(),
4204 FD.D, FD.BitfieldSize);
4205 FieldDecls.push_back(Field);
4209 // Parse all the comma separated declarators.
4210 ParsingDeclSpec DS(*this);
4211 ParseStructDeclaration(DS, CFieldCallback);
4212 } else { // Handle @defs
4214 if (!Tok.isObjCAtKeyword(tok::objc_defs)) {
4215 Diag(Tok, diag::err_unexpected_at);
4216 SkipUntil(tok::semi);
4220 ExpectAndConsume(tok::l_paren);
4221 if (!Tok.is(tok::identifier)) {
4222 Diag(Tok, diag::err_expected) << tok::identifier;
4223 SkipUntil(tok::semi);
4226 SmallVector<Decl *, 16> Fields;
4227 Actions.ActOnDefs(getCurScope(), TagDecl, Tok.getLocation(),
4228 Tok.getIdentifierInfo(), Fields);
4229 FieldDecls.insert(FieldDecls.end(), Fields.begin(), Fields.end());
4231 ExpectAndConsume(tok::r_paren);
4234 if (TryConsumeToken(tok::semi))
4237 if (Tok.is(tok::r_brace)) {
4238 ExpectAndConsume(tok::semi, diag::ext_expected_semi_decl_list);
4242 ExpectAndConsume(tok::semi, diag::err_expected_semi_decl_list);
4243 // Skip to end of block or statement to avoid ext-warning on extra ';'.
4244 SkipUntil(tok::r_brace, StopAtSemi | StopBeforeMatch);
4245 // If we stopped at a ';', eat it.
4246 TryConsumeToken(tok::semi);
4251 ParsedAttributes attrs(AttrFactory);
4252 // If attributes exist after struct contents, parse them.
4253 MaybeParseGNUAttributes(attrs);
4255 Actions.ActOnFields(getCurScope(), RecordLoc, TagDecl, FieldDecls,
4256 T.getOpenLocation(), T.getCloseLocation(), attrs);
4258 Actions.ActOnTagFinishDefinition(getCurScope(), TagDecl, T.getRange());
4261 /// ParseEnumSpecifier
4262 /// enum-specifier: [C99 6.7.2.2]
4263 /// 'enum' identifier[opt] '{' enumerator-list '}'
4264 ///[C99/C++]'enum' identifier[opt] '{' enumerator-list ',' '}'
4265 /// [GNU] 'enum' attributes[opt] identifier[opt] '{' enumerator-list ',' [opt]
4266 /// '}' attributes[opt]
4267 /// [MS] 'enum' __declspec[opt] identifier[opt] '{' enumerator-list ',' [opt]
4269 /// 'enum' identifier
4270 /// [GNU] 'enum' attributes[opt] identifier
4272 /// [C++11] enum-head '{' enumerator-list[opt] '}'
4273 /// [C++11] enum-head '{' enumerator-list ',' '}'
4275 /// enum-head: [C++11]
4276 /// enum-key attribute-specifier-seq[opt] identifier[opt] enum-base[opt]
4277 /// enum-key attribute-specifier-seq[opt] nested-name-specifier
4278 /// identifier enum-base[opt]
4280 /// enum-key: [C++11]
4285 /// enum-base: [C++11]
4286 /// ':' type-specifier-seq
4288 /// [C++] elaborated-type-specifier:
4289 /// [C++] 'enum' '::'[opt] nested-name-specifier[opt] identifier
4291 void Parser::ParseEnumSpecifier(SourceLocation StartLoc, DeclSpec &DS,
4292 const ParsedTemplateInfo &TemplateInfo,
4293 AccessSpecifier AS, DeclSpecContext DSC) {
4294 // Parse the tag portion of this.
4295 if (Tok.is(tok::code_completion)) {
4296 // Code completion for an enum name.
4297 Actions.CodeCompleteTag(getCurScope(), DeclSpec::TST_enum);
4298 return cutOffParsing();
4301 // If attributes exist after tag, parse them.
4302 ParsedAttributesWithRange attrs(AttrFactory);
4303 MaybeParseGNUAttributes(attrs);
4304 MaybeParseCXX11Attributes(attrs);
4305 MaybeParseMicrosoftDeclSpecs(attrs);
4307 SourceLocation ScopedEnumKWLoc;
4308 bool IsScopedUsingClassTag = false;
4310 // In C++11, recognize 'enum class' and 'enum struct'.
4311 if (Tok.isOneOf(tok::kw_class, tok::kw_struct)) {
4312 Diag(Tok, getLangOpts().CPlusPlus11 ? diag::warn_cxx98_compat_scoped_enum
4313 : diag::ext_scoped_enum);
4314 IsScopedUsingClassTag = Tok.is(tok::kw_class);
4315 ScopedEnumKWLoc = ConsumeToken();
4317 // Attributes are not allowed between these keywords. Diagnose,
4318 // but then just treat them like they appeared in the right place.
4319 ProhibitAttributes(attrs);
4321 // They are allowed afterwards, though.
4322 MaybeParseGNUAttributes(attrs);
4323 MaybeParseCXX11Attributes(attrs);
4324 MaybeParseMicrosoftDeclSpecs(attrs);
4327 // C++11 [temp.explicit]p12:
4328 // The usual access controls do not apply to names used to specify
4329 // explicit instantiations.
4330 // We extend this to also cover explicit specializations. Note that
4331 // we don't suppress if this turns out to be an elaborated type
4333 bool shouldDelayDiagsInTag =
4334 (TemplateInfo.Kind == ParsedTemplateInfo::ExplicitInstantiation ||
4335 TemplateInfo.Kind == ParsedTemplateInfo::ExplicitSpecialization);
4336 SuppressAccessChecks diagsFromTag(*this, shouldDelayDiagsInTag);
4338 // Enum definitions should not be parsed in a trailing-return-type.
4339 bool AllowDeclaration = DSC != DeclSpecContext::DSC_trailing;
4341 CXXScopeSpec &SS = DS.getTypeSpecScope();
4342 if (getLangOpts().CPlusPlus) {
4343 // "enum foo : bar;" is not a potential typo for "enum foo::bar;"
4344 // if a fixed underlying type is allowed.
4345 ColonProtectionRAIIObject X(*this, AllowDeclaration);
4348 if (ParseOptionalCXXScopeSpecifier(Spec, nullptr,
4349 /*EnteringContext=*/true))
4352 if (Spec.isSet() && Tok.isNot(tok::identifier)) {
4353 Diag(Tok, diag::err_expected) << tok::identifier;
4354 if (Tok.isNot(tok::l_brace)) {
4355 // Has no name and is not a definition.
4356 // Skip the rest of this declarator, up until the comma or semicolon.
4357 SkipUntil(tok::comma, StopAtSemi);
4365 // Must have either 'enum name' or 'enum {...}'.
4366 if (Tok.isNot(tok::identifier) && Tok.isNot(tok::l_brace) &&
4367 !(AllowDeclaration && Tok.is(tok::colon))) {
4368 Diag(Tok, diag::err_expected_either) << tok::identifier << tok::l_brace;
4370 // Skip the rest of this declarator, up until the comma or semicolon.
4371 SkipUntil(tok::comma, StopAtSemi);
4375 // If an identifier is present, consume and remember it.
4376 IdentifierInfo *Name = nullptr;
4377 SourceLocation NameLoc;
4378 if (Tok.is(tok::identifier)) {
4379 Name = Tok.getIdentifierInfo();
4380 NameLoc = ConsumeToken();
4383 if (!Name && ScopedEnumKWLoc.isValid()) {
4384 // C++0x 7.2p2: The optional identifier shall not be omitted in the
4385 // declaration of a scoped enumeration.
4386 Diag(Tok, diag::err_scoped_enum_missing_identifier);
4387 ScopedEnumKWLoc = SourceLocation();
4388 IsScopedUsingClassTag = false;
4391 // Okay, end the suppression area. We'll decide whether to emit the
4392 // diagnostics in a second.
4393 if (shouldDelayDiagsInTag)
4394 diagsFromTag.done();
4396 TypeResult BaseType;
4398 // Parse the fixed underlying type.
4399 bool CanBeBitfield = getCurScope()->getFlags() & Scope::ClassScope;
4400 if (AllowDeclaration && Tok.is(tok::colon)) {
4401 bool PossibleBitfield = false;
4402 if (CanBeBitfield) {
4403 // If we're in class scope, this can either be an enum declaration with
4404 // an underlying type, or a declaration of a bitfield member. We try to
4405 // use a simple disambiguation scheme first to catch the common cases
4406 // (integer literal, sizeof); if it's still ambiguous, we then consider
4407 // anything that's a simple-type-specifier followed by '(' as an
4408 // expression. This suffices because function types are not valid
4409 // underlying types anyway.
4410 EnterExpressionEvaluationContext Unevaluated(
4411 Actions, Sema::ExpressionEvaluationContext::ConstantEvaluated);
4412 TPResult TPR = isExpressionOrTypeSpecifierSimple(NextToken().getKind());
4413 // If the next token starts an expression, we know we're parsing a
4414 // bit-field. This is the common case.
4415 if (TPR == TPResult::True)
4416 PossibleBitfield = true;
4417 // If the next token starts a type-specifier-seq, it may be either a
4418 // a fixed underlying type or the start of a function-style cast in C++;
4419 // lookahead one more token to see if it's obvious that we have a
4420 // fixed underlying type.
4421 else if (TPR == TPResult::False &&
4422 GetLookAheadToken(2).getKind() == tok::semi) {
4426 // We have the start of a type-specifier-seq, so we have to perform
4427 // tentative parsing to determine whether we have an expression or a
4429 TentativeParsingAction TPA(*this);
4434 // If we see a type specifier followed by an open-brace, we have an
4435 // ambiguity between an underlying type and a C++11 braced
4436 // function-style cast. Resolve this by always treating it as an
4438 // FIXME: The standard is not entirely clear on how to disambiguate in
4440 if ((getLangOpts().CPlusPlus &&
4441 isCXXDeclarationSpecifier(TPResult::True) != TPResult::True) ||
4442 (!getLangOpts().CPlusPlus && !isDeclarationSpecifier(true))) {
4443 // We'll parse this as a bitfield later.
4444 PossibleBitfield = true;
4447 // We have a type-specifier-seq.
4456 if (!PossibleBitfield) {
4458 BaseType = ParseTypeName(&Range);
4460 if (!getLangOpts().ObjC) {
4461 if (getLangOpts().CPlusPlus11)
4462 Diag(StartLoc, diag::warn_cxx98_compat_enum_fixed_underlying_type);
4463 else if (getLangOpts().CPlusPlus)
4464 Diag(StartLoc, diag::ext_cxx11_enum_fixed_underlying_type);
4465 else if (getLangOpts().MicrosoftExt)
4466 Diag(StartLoc, diag::ext_ms_c_enum_fixed_underlying_type);
4468 Diag(StartLoc, diag::ext_clang_c_enum_fixed_underlying_type);
4473 // There are four options here. If we have 'friend enum foo;' then this is a
4474 // friend declaration, and cannot have an accompanying definition. If we have
4475 // 'enum foo;', then this is a forward declaration. If we have
4476 // 'enum foo {...' then this is a definition. Otherwise we have something
4477 // like 'enum foo xyz', a reference.
4479 // This is needed to handle stuff like this right (C99 6.7.2.3p11):
4480 // enum foo {..}; void bar() { enum foo; } <- new foo in bar.
4481 // enum foo {..}; void bar() { enum foo x; } <- use of old foo.
4483 Sema::TagUseKind TUK;
4484 if (!AllowDeclaration) {
4485 TUK = Sema::TUK_Reference;
4486 } else if (Tok.is(tok::l_brace)) {
4487 if (DS.isFriendSpecified()) {
4488 Diag(Tok.getLocation(), diag::err_friend_decl_defines_type)
4489 << SourceRange(DS.getFriendSpecLoc());
4491 SkipUntil(tok::r_brace, StopAtSemi);
4492 TUK = Sema::TUK_Friend;
4494 TUK = Sema::TUK_Definition;
4496 } else if (!isTypeSpecifier(DSC) &&
4497 (Tok.is(tok::semi) ||
4498 (Tok.isAtStartOfLine() &&
4499 !isValidAfterTypeSpecifier(CanBeBitfield)))) {
4500 TUK = DS.isFriendSpecified() ? Sema::TUK_Friend : Sema::TUK_Declaration;
4501 if (Tok.isNot(tok::semi)) {
4502 // A semicolon was missing after this declaration. Diagnose and recover.
4503 ExpectAndConsume(tok::semi, diag::err_expected_after, "enum");
4504 PP.EnterToken(Tok, /*IsReinject=*/true);
4505 Tok.setKind(tok::semi);
4508 TUK = Sema::TUK_Reference;
4511 // If this is an elaborated type specifier, and we delayed
4512 // diagnostics before, just merge them into the current pool.
4513 if (TUK == Sema::TUK_Reference && shouldDelayDiagsInTag) {
4514 diagsFromTag.redelay();
4517 MultiTemplateParamsArg TParams;
4518 if (TemplateInfo.Kind != ParsedTemplateInfo::NonTemplate &&
4519 TUK != Sema::TUK_Reference) {
4520 if (!getLangOpts().CPlusPlus11 || !SS.isSet()) {
4521 // Skip the rest of this declarator, up until the comma or semicolon.
4522 Diag(Tok, diag::err_enum_template);
4523 SkipUntil(tok::comma, StopAtSemi);
4527 if (TemplateInfo.Kind == ParsedTemplateInfo::ExplicitInstantiation) {
4528 // Enumerations can't be explicitly instantiated.
4529 DS.SetTypeSpecError();
4530 Diag(StartLoc, diag::err_explicit_instantiation_enum);
4534 assert(TemplateInfo.TemplateParams && "no template parameters");
4535 TParams = MultiTemplateParamsArg(TemplateInfo.TemplateParams->data(),
4536 TemplateInfo.TemplateParams->size());
4539 if (TUK == Sema::TUK_Reference)
4540 ProhibitAttributes(attrs);
4542 if (!Name && TUK != Sema::TUK_Definition) {
4543 Diag(Tok, diag::err_enumerator_unnamed_no_def);
4545 // Skip the rest of this declarator, up until the comma or semicolon.
4546 SkipUntil(tok::comma, StopAtSemi);
4550 stripTypeAttributesOffDeclSpec(attrs, DS, TUK);
4552 Sema::SkipBodyInfo SkipBody;
4553 if (!Name && TUK == Sema::TUK_Definition && Tok.is(tok::l_brace) &&
4554 NextToken().is(tok::identifier))
4555 SkipBody = Actions.shouldSkipAnonEnumBody(getCurScope(),
4556 NextToken().getIdentifierInfo(),
4557 NextToken().getLocation());
4560 bool IsDependent = false;
4561 const char *PrevSpec = nullptr;
4563 Decl *TagDecl = Actions.ActOnTag(
4564 getCurScope(), DeclSpec::TST_enum, TUK, StartLoc, SS, Name, NameLoc,
4565 attrs, AS, DS.getModulePrivateSpecLoc(), TParams, Owned, IsDependent,
4566 ScopedEnumKWLoc, IsScopedUsingClassTag, BaseType,
4567 DSC == DeclSpecContext::DSC_type_specifier,
4568 DSC == DeclSpecContext::DSC_template_param ||
4569 DSC == DeclSpecContext::DSC_template_type_arg,
4572 if (SkipBody.ShouldSkip) {
4573 assert(TUK == Sema::TUK_Definition && "can only skip a definition");
4575 BalancedDelimiterTracker T(*this, tok::l_brace);
4579 if (DS.SetTypeSpecType(DeclSpec::TST_enum, StartLoc,
4580 NameLoc.isValid() ? NameLoc : StartLoc,
4581 PrevSpec, DiagID, TagDecl, Owned,
4582 Actions.getASTContext().getPrintingPolicy()))
4583 Diag(StartLoc, DiagID) << PrevSpec;
4588 // This enum has a dependent nested-name-specifier. Handle it as a
4591 DS.SetTypeSpecError();
4592 Diag(Tok, diag::err_expected_type_name_after_typename);
4596 TypeResult Type = Actions.ActOnDependentTag(
4597 getCurScope(), DeclSpec::TST_enum, TUK, SS, Name, StartLoc, NameLoc);
4598 if (Type.isInvalid()) {
4599 DS.SetTypeSpecError();
4603 if (DS.SetTypeSpecType(DeclSpec::TST_typename, StartLoc,
4604 NameLoc.isValid() ? NameLoc : StartLoc,
4605 PrevSpec, DiagID, Type.get(),
4606 Actions.getASTContext().getPrintingPolicy()))
4607 Diag(StartLoc, DiagID) << PrevSpec;
4613 // The action failed to produce an enumeration tag. If this is a
4614 // definition, consume the entire definition.
4615 if (Tok.is(tok::l_brace) && TUK != Sema::TUK_Reference) {
4617 SkipUntil(tok::r_brace, StopAtSemi);
4620 DS.SetTypeSpecError();
4624 if (Tok.is(tok::l_brace) && TUK != Sema::TUK_Reference) {
4625 Decl *D = SkipBody.CheckSameAsPrevious ? SkipBody.New : TagDecl;
4626 ParseEnumBody(StartLoc, D);
4627 if (SkipBody.CheckSameAsPrevious &&
4628 !Actions.ActOnDuplicateDefinition(DS, TagDecl, SkipBody)) {
4629 DS.SetTypeSpecError();
4634 if (DS.SetTypeSpecType(DeclSpec::TST_enum, StartLoc,
4635 NameLoc.isValid() ? NameLoc : StartLoc,
4636 PrevSpec, DiagID, TagDecl, Owned,
4637 Actions.getASTContext().getPrintingPolicy()))
4638 Diag(StartLoc, DiagID) << PrevSpec;
4641 /// ParseEnumBody - Parse a {} enclosed enumerator-list.
4642 /// enumerator-list:
4644 /// enumerator-list ',' enumerator
4646 /// enumeration-constant attributes[opt]
4647 /// enumeration-constant attributes[opt] '=' constant-expression
4648 /// enumeration-constant:
4651 void Parser::ParseEnumBody(SourceLocation StartLoc, Decl *EnumDecl) {
4652 // Enter the scope of the enum body and start the definition.
4653 ParseScope EnumScope(this, Scope::DeclScope | Scope::EnumScope);
4654 Actions.ActOnTagStartDefinition(getCurScope(), EnumDecl);
4656 BalancedDelimiterTracker T(*this, tok::l_brace);
4659 // C does not allow an empty enumerator-list, C++ does [dcl.enum].
4660 if (Tok.is(tok::r_brace) && !getLangOpts().CPlusPlus)
4661 Diag(Tok, diag::err_empty_enum);
4663 SmallVector<Decl *, 32> EnumConstantDecls;
4664 SmallVector<SuppressAccessChecks, 32> EnumAvailabilityDiags;
4666 Decl *LastEnumConstDecl = nullptr;
4668 // Parse the enumerator-list.
4669 while (Tok.isNot(tok::r_brace)) {
4670 // Parse enumerator. If failed, try skipping till the start of the next
4671 // enumerator definition.
4672 if (Tok.isNot(tok::identifier)) {
4673 Diag(Tok.getLocation(), diag::err_expected) << tok::identifier;
4674 if (SkipUntil(tok::comma, tok::r_brace, StopBeforeMatch) &&
4675 TryConsumeToken(tok::comma))
4679 IdentifierInfo *Ident = Tok.getIdentifierInfo();
4680 SourceLocation IdentLoc = ConsumeToken();
4682 // If attributes exist after the enumerator, parse them.
4683 ParsedAttributesWithRange attrs(AttrFactory);
4684 MaybeParseGNUAttributes(attrs);
4685 ProhibitAttributes(attrs); // GNU-style attributes are prohibited.
4686 if (standardAttributesAllowed() && isCXX11AttributeSpecifier()) {
4687 if (getLangOpts().CPlusPlus)
4688 Diag(Tok.getLocation(), getLangOpts().CPlusPlus17
4689 ? diag::warn_cxx14_compat_ns_enum_attribute
4690 : diag::ext_ns_enum_attribute)
4691 << 1 /*enumerator*/;
4692 ParseCXX11Attributes(attrs);
4695 SourceLocation EqualLoc;
4696 ExprResult AssignedVal;
4697 EnumAvailabilityDiags.emplace_back(*this);
4699 EnterExpressionEvaluationContext ConstantEvaluated(
4700 Actions, Sema::ExpressionEvaluationContext::ConstantEvaluated);
4701 if (TryConsumeToken(tok::equal, EqualLoc)) {
4702 AssignedVal = ParseConstantExpressionInExprEvalContext();
4703 if (AssignedVal.isInvalid())
4704 SkipUntil(tok::comma, tok::r_brace, StopBeforeMatch);
4707 // Install the enumerator constant into EnumDecl.
4708 Decl *EnumConstDecl = Actions.ActOnEnumConstant(
4709 getCurScope(), EnumDecl, LastEnumConstDecl, IdentLoc, Ident, attrs,
4710 EqualLoc, AssignedVal.get());
4711 EnumAvailabilityDiags.back().done();
4713 EnumConstantDecls.push_back(EnumConstDecl);
4714 LastEnumConstDecl = EnumConstDecl;
4716 if (Tok.is(tok::identifier)) {
4717 // We're missing a comma between enumerators.
4718 SourceLocation Loc = getEndOfPreviousToken();
4719 Diag(Loc, diag::err_enumerator_list_missing_comma)
4720 << FixItHint::CreateInsertion(Loc, ", ");
4724 // Emumerator definition must be finished, only comma or r_brace are
4726 SourceLocation CommaLoc;
4727 if (Tok.isNot(tok::r_brace) && !TryConsumeToken(tok::comma, CommaLoc)) {
4728 if (EqualLoc.isValid())
4729 Diag(Tok.getLocation(), diag::err_expected_either) << tok::r_brace
4732 Diag(Tok.getLocation(), diag::err_expected_end_of_enumerator);
4733 if (SkipUntil(tok::comma, tok::r_brace, StopBeforeMatch)) {
4734 if (TryConsumeToken(tok::comma, CommaLoc))
4741 // If comma is followed by r_brace, emit appropriate warning.
4742 if (Tok.is(tok::r_brace) && CommaLoc.isValid()) {
4743 if (!getLangOpts().C99 && !getLangOpts().CPlusPlus11)
4744 Diag(CommaLoc, getLangOpts().CPlusPlus ?
4745 diag::ext_enumerator_list_comma_cxx :
4746 diag::ext_enumerator_list_comma_c)
4747 << FixItHint::CreateRemoval(CommaLoc);
4748 else if (getLangOpts().CPlusPlus11)
4749 Diag(CommaLoc, diag::warn_cxx98_compat_enumerator_list_comma)
4750 << FixItHint::CreateRemoval(CommaLoc);
4758 // If attributes exist after the identifier list, parse them.
4759 ParsedAttributes attrs(AttrFactory);
4760 MaybeParseGNUAttributes(attrs);
4762 Actions.ActOnEnumBody(StartLoc, T.getRange(), EnumDecl, EnumConstantDecls,
4763 getCurScope(), attrs);
4765 // Now handle enum constant availability diagnostics.
4766 assert(EnumConstantDecls.size() == EnumAvailabilityDiags.size());
4767 for (size_t i = 0, e = EnumConstantDecls.size(); i != e; ++i) {
4768 ParsingDeclRAIIObject PD(*this, ParsingDeclRAIIObject::NoParent);
4769 EnumAvailabilityDiags[i].redelay();
4770 PD.complete(EnumConstantDecls[i]);
4774 Actions.ActOnTagFinishDefinition(getCurScope(), EnumDecl, T.getRange());
4776 // The next token must be valid after an enum definition. If not, a ';'
4777 // was probably forgotten.
4778 bool CanBeBitfield = getCurScope()->getFlags() & Scope::ClassScope;
4779 if (!isValidAfterTypeSpecifier(CanBeBitfield)) {
4780 ExpectAndConsume(tok::semi, diag::err_expected_after, "enum");
4781 // Push this token back into the preprocessor and change our current token
4782 // to ';' so that the rest of the code recovers as though there were an
4783 // ';' after the definition.
4784 PP.EnterToken(Tok, /*IsReinject=*/true);
4785 Tok.setKind(tok::semi);
4789 /// isKnownToBeTypeSpecifier - Return true if we know that the specified token
4790 /// is definitely a type-specifier. Return false if it isn't part of a type
4791 /// specifier or if we're not sure.
4792 bool Parser::isKnownToBeTypeSpecifier(const Token &Tok) const {
4793 switch (Tok.getKind()) {
4794 default: return false;
4798 case tok::kw___int64:
4799 case tok::kw___int128:
4800 case tok::kw_signed:
4801 case tok::kw_unsigned:
4802 case tok::kw__Complex:
4803 case tok::kw__Imaginary:
4806 case tok::kw_wchar_t:
4807 case tok::kw_char8_t:
4808 case tok::kw_char16_t:
4809 case tok::kw_char32_t:
4813 case tok::kw_double:
4814 case tok::kw__Accum:
4815 case tok::kw__Fract:
4816 case tok::kw__Float16:
4817 case tok::kw___float128:
4820 case tok::kw__Decimal32:
4821 case tok::kw__Decimal64:
4822 case tok::kw__Decimal128:
4823 case tok::kw___vector:
4824 #define GENERIC_IMAGE_TYPE(ImgType, Id) case tok::kw_##ImgType##_t:
4825 #include "clang/Basic/OpenCLImageTypes.def"
4827 // struct-or-union-specifier (C99) or class-specifier (C++)
4829 case tok::kw_struct:
4830 case tok::kw___interface:
4836 case tok::annot_typename:
4841 /// isTypeSpecifierQualifier - Return true if the current token could be the
4842 /// start of a specifier-qualifier-list.
4843 bool Parser::isTypeSpecifierQualifier() {
4844 switch (Tok.getKind()) {
4845 default: return false;
4847 case tok::identifier: // foo::bar
4848 if (TryAltiVecVectorToken())
4851 case tok::kw_typename: // typename T::type
4852 // Annotate typenames and C++ scope specifiers. If we get one, just
4853 // recurse to handle whatever we get.
4854 if (TryAnnotateTypeOrScopeToken())
4856 if (Tok.is(tok::identifier))
4858 return isTypeSpecifierQualifier();
4860 case tok::coloncolon: // ::foo::bar
4861 if (NextToken().is(tok::kw_new) || // ::new
4862 NextToken().is(tok::kw_delete)) // ::delete
4865 if (TryAnnotateTypeOrScopeToken())
4867 return isTypeSpecifierQualifier();
4869 // GNU attributes support.
4870 case tok::kw___attribute:
4871 // GNU typeof support.
4872 case tok::kw_typeof:
4877 case tok::kw___int64:
4878 case tok::kw___int128:
4879 case tok::kw_signed:
4880 case tok::kw_unsigned:
4881 case tok::kw__Complex:
4882 case tok::kw__Imaginary:
4885 case tok::kw_wchar_t:
4886 case tok::kw_char8_t:
4887 case tok::kw_char16_t:
4888 case tok::kw_char32_t:
4892 case tok::kw_double:
4893 case tok::kw__Accum:
4894 case tok::kw__Fract:
4895 case tok::kw__Float16:
4896 case tok::kw___float128:
4899 case tok::kw__Decimal32:
4900 case tok::kw__Decimal64:
4901 case tok::kw__Decimal128:
4902 case tok::kw___vector:
4903 #define GENERIC_IMAGE_TYPE(ImgType, Id) case tok::kw_##ImgType##_t:
4904 #include "clang/Basic/OpenCLImageTypes.def"
4906 // struct-or-union-specifier (C99) or class-specifier (C++)
4908 case tok::kw_struct:
4909 case tok::kw___interface:
4916 case tok::kw_volatile:
4917 case tok::kw_restrict:
4920 // Debugger support.
4921 case tok::kw___unknown_anytype:
4924 case tok::annot_typename:
4927 // GNU ObjC bizarre protocol extension: <proto1,proto2> with implicit 'id'.
4929 return getLangOpts().ObjC;
4931 case tok::kw___cdecl:
4932 case tok::kw___stdcall:
4933 case tok::kw___fastcall:
4934 case tok::kw___thiscall:
4935 case tok::kw___regcall:
4936 case tok::kw___vectorcall:
4938 case tok::kw___ptr64:
4939 case tok::kw___ptr32:
4940 case tok::kw___pascal:
4941 case tok::kw___unaligned:
4943 case tok::kw__Nonnull:
4944 case tok::kw__Nullable:
4945 case tok::kw__Null_unspecified:
4947 case tok::kw___kindof:
4949 case tok::kw___private:
4950 case tok::kw___local:
4951 case tok::kw___global:
4952 case tok::kw___constant:
4953 case tok::kw___generic:
4954 case tok::kw___read_only:
4955 case tok::kw___read_write:
4956 case tok::kw___write_only:
4959 case tok::kw_private:
4960 return getLangOpts().OpenCL;
4963 case tok::kw__Atomic:
4968 /// isDeclarationSpecifier() - Return true if the current token is part of a
4969 /// declaration specifier.
4971 /// \param DisambiguatingWithExpression True to indicate that the purpose of
4972 /// this check is to disambiguate between an expression and a declaration.
4973 bool Parser::isDeclarationSpecifier(bool DisambiguatingWithExpression) {
4974 switch (Tok.getKind()) {
4975 default: return false;
4978 return (getLangOpts().OpenCL && getLangOpts().OpenCLVersion >= 200) ||
4979 getLangOpts().OpenCLCPlusPlus;
4981 case tok::identifier: // foo::bar
4982 // Unfortunate hack to support "Class.factoryMethod" notation.
4983 if (getLangOpts().ObjC && NextToken().is(tok::period))
4985 if (TryAltiVecVectorToken())
4988 case tok::kw_decltype: // decltype(T())::type
4989 case tok::kw_typename: // typename T::type
4990 // Annotate typenames and C++ scope specifiers. If we get one, just
4991 // recurse to handle whatever we get.
4992 if (TryAnnotateTypeOrScopeToken())
4994 if (Tok.is(tok::identifier))
4997 // If we're in Objective-C and we have an Objective-C class type followed
4998 // by an identifier and then either ':' or ']', in a place where an
4999 // expression is permitted, then this is probably a class message send
5000 // missing the initial '['. In this case, we won't consider this to be
5001 // the start of a declaration.
5002 if (DisambiguatingWithExpression &&
5003 isStartOfObjCClassMessageMissingOpenBracket())
5006 return isDeclarationSpecifier();
5008 case tok::coloncolon: // ::foo::bar
5009 if (NextToken().is(tok::kw_new) || // ::new
5010 NextToken().is(tok::kw_delete)) // ::delete
5013 // Annotate typenames and C++ scope specifiers. If we get one, just
5014 // recurse to handle whatever we get.
5015 if (TryAnnotateTypeOrScopeToken())
5017 return isDeclarationSpecifier();
5019 // storage-class-specifier
5020 case tok::kw_typedef:
5021 case tok::kw_extern:
5022 case tok::kw___private_extern__:
5023 case tok::kw_static:
5025 case tok::kw___auto_type:
5026 case tok::kw_register:
5027 case tok::kw___thread:
5028 case tok::kw_thread_local:
5029 case tok::kw__Thread_local:
5032 case tok::kw___module_private__:
5035 case tok::kw___unknown_anytype:
5040 case tok::kw___int64:
5041 case tok::kw___int128:
5042 case tok::kw_signed:
5043 case tok::kw_unsigned:
5044 case tok::kw__Complex:
5045 case tok::kw__Imaginary:
5048 case tok::kw_wchar_t:
5049 case tok::kw_char8_t:
5050 case tok::kw_char16_t:
5051 case tok::kw_char32_t:
5056 case tok::kw_double:
5057 case tok::kw__Accum:
5058 case tok::kw__Fract:
5059 case tok::kw__Float16:
5060 case tok::kw___float128:
5063 case tok::kw__Decimal32:
5064 case tok::kw__Decimal64:
5065 case tok::kw__Decimal128:
5066 case tok::kw___vector:
5068 // struct-or-union-specifier (C99) or class-specifier (C++)
5070 case tok::kw_struct:
5072 case tok::kw___interface:
5078 case tok::kw_volatile:
5079 case tok::kw_restrict:
5082 // function-specifier
5083 case tok::kw_inline:
5084 case tok::kw_virtual:
5085 case tok::kw_explicit:
5086 case tok::kw__Noreturn:
5088 // alignment-specifier
5089 case tok::kw__Alignas:
5092 case tok::kw_friend:
5094 // static_assert-declaration
5095 case tok::kw__Static_assert:
5097 // GNU typeof support.
5098 case tok::kw_typeof:
5101 case tok::kw___attribute:
5103 // C++11 decltype and constexpr.
5104 case tok::annot_decltype:
5105 case tok::kw_constexpr:
5107 // C++20 consteval and constinit.
5108 case tok::kw_consteval:
5109 case tok::kw_constinit:
5112 case tok::kw__Atomic:
5115 // GNU ObjC bizarre protocol extension: <proto1,proto2> with implicit 'id'.
5117 return getLangOpts().ObjC;
5120 case tok::annot_typename:
5121 return !DisambiguatingWithExpression ||
5122 !isStartOfObjCClassMessageMissingOpenBracket();
5124 // placeholder-type-specifier
5125 case tok::annot_template_id: {
5126 TemplateIdAnnotation *TemplateId = takeTemplateIdAnnotation(Tok);
5127 return TemplateId->Kind == TNK_Concept_template &&
5128 (NextToken().is(tok::kw_auto) || NextToken().is(tok::kw_decltype));
5131 case tok::kw___declspec:
5132 case tok::kw___cdecl:
5133 case tok::kw___stdcall:
5134 case tok::kw___fastcall:
5135 case tok::kw___thiscall:
5136 case tok::kw___regcall:
5137 case tok::kw___vectorcall:
5139 case tok::kw___sptr:
5140 case tok::kw___uptr:
5141 case tok::kw___ptr64:
5142 case tok::kw___ptr32:
5143 case tok::kw___forceinline:
5144 case tok::kw___pascal:
5145 case tok::kw___unaligned:
5147 case tok::kw__Nonnull:
5148 case tok::kw__Nullable:
5149 case tok::kw__Null_unspecified:
5151 case tok::kw___kindof:
5153 case tok::kw___private:
5154 case tok::kw___local:
5155 case tok::kw___global:
5156 case tok::kw___constant:
5157 case tok::kw___generic:
5158 case tok::kw___read_only:
5159 case tok::kw___read_write:
5160 case tok::kw___write_only:
5161 #define GENERIC_IMAGE_TYPE(ImgType, Id) case tok::kw_##ImgType##_t:
5162 #include "clang/Basic/OpenCLImageTypes.def"
5166 case tok::kw_private:
5167 return getLangOpts().OpenCL;
5171 bool Parser::isConstructorDeclarator(bool IsUnqualified, bool DeductionGuide) {
5172 TentativeParsingAction TPA(*this);
5174 // Parse the C++ scope specifier.
5176 if (ParseOptionalCXXScopeSpecifier(SS, nullptr,
5177 /*EnteringContext=*/true)) {
5182 // Parse the constructor name.
5183 if (Tok.is(tok::identifier)) {
5184 // We already know that we have a constructor name; just consume
5187 } else if (Tok.is(tok::annot_template_id)) {
5188 ConsumeAnnotationToken();
5194 // There may be attributes here, appertaining to the constructor name or type
5195 // we just stepped past.
5196 SkipCXX11Attributes();
5198 // Current class name must be followed by a left parenthesis.
5199 if (Tok.isNot(tok::l_paren)) {
5205 // A right parenthesis, or ellipsis followed by a right parenthesis signals
5206 // that we have a constructor.
5207 if (Tok.is(tok::r_paren) ||
5208 (Tok.is(tok::ellipsis) && NextToken().is(tok::r_paren))) {
5213 // A C++11 attribute here signals that we have a constructor, and is an
5214 // attribute on the first constructor parameter.
5215 if (getLangOpts().CPlusPlus11 &&
5216 isCXX11AttributeSpecifier(/*Disambiguate*/ false,
5217 /*OuterMightBeMessageSend*/ true)) {
5222 // If we need to, enter the specified scope.
5223 DeclaratorScopeObj DeclScopeObj(*this, SS);
5224 if (SS.isSet() && Actions.ShouldEnterDeclaratorScope(getCurScope(), SS))
5225 DeclScopeObj.EnterDeclaratorScope();
5227 // Optionally skip Microsoft attributes.
5228 ParsedAttributes Attrs(AttrFactory);
5229 MaybeParseMicrosoftAttributes(Attrs);
5231 // Check whether the next token(s) are part of a declaration
5232 // specifier, in which case we have the start of a parameter and,
5233 // therefore, we know that this is a constructor.
5234 bool IsConstructor = false;
5235 if (isDeclarationSpecifier())
5236 IsConstructor = true;
5237 else if (Tok.is(tok::identifier) ||
5238 (Tok.is(tok::annot_cxxscope) && NextToken().is(tok::identifier))) {
5239 // We've seen "C ( X" or "C ( X::Y", but "X" / "X::Y" is not a type.
5240 // This might be a parenthesized member name, but is more likely to
5241 // be a constructor declaration with an invalid argument type. Keep
5243 if (Tok.is(tok::annot_cxxscope))
5244 ConsumeAnnotationToken();
5247 // If this is not a constructor, we must be parsing a declarator,
5248 // which must have one of the following syntactic forms (see the
5249 // grammar extract at the start of ParseDirectDeclarator):
5250 switch (Tok.getKind()) {
5255 // C(X [ [attribute]]);
5256 case tok::coloncolon:
5259 // Assume this isn't a constructor, rather than assuming it's a
5260 // constructor with an unnamed parameter of an ill-formed type.
5266 // Skip past the right-paren and any following attributes to get to
5267 // the function body or trailing-return-type.
5269 SkipCXX11Attributes();
5271 if (DeductionGuide) {
5272 // C(X) -> ... is a deduction guide.
5273 IsConstructor = Tok.is(tok::arrow);
5276 if (Tok.is(tok::colon) || Tok.is(tok::kw_try)) {
5277 // Assume these were meant to be constructors:
5278 // C(X) : (the name of a bit-field cannot be parenthesized).
5279 // C(X) try (this is otherwise ill-formed).
5280 IsConstructor = true;
5282 if (Tok.is(tok::semi) || Tok.is(tok::l_brace)) {
5283 // If we have a constructor name within the class definition,
5284 // assume these were meant to be constructors:
5287 // ... because otherwise we would be declaring a non-static data
5288 // member that is ill-formed because it's of the same type as its
5289 // surrounding class.
5291 // FIXME: We can actually do this whether or not the name is qualified,
5292 // because if it is qualified in this context it must be being used as
5293 // a constructor name.
5294 // currently, so we're somewhat conservative here.
5295 IsConstructor = IsUnqualified;
5300 IsConstructor = true;
5306 return IsConstructor;
5309 /// ParseTypeQualifierListOpt
5310 /// type-qualifier-list: [C99 6.7.5]
5312 /// [vendor] attributes
5313 /// [ only if AttrReqs & AR_VendorAttributesParsed ]
5314 /// type-qualifier-list type-qualifier
5315 /// [vendor] type-qualifier-list attributes
5316 /// [ only if AttrReqs & AR_VendorAttributesParsed ]
5317 /// [C++0x] attribute-specifier[opt] is allowed before cv-qualifier-seq
5318 /// [ only if AttReqs & AR_CXX11AttributesParsed ]
5319 /// Note: vendor can be GNU, MS, etc and can be explicitly controlled via
5320 /// AttrRequirements bitmask values.
5321 void Parser::ParseTypeQualifierListOpt(
5322 DeclSpec &DS, unsigned AttrReqs, bool AtomicAllowed,
5323 bool IdentifierRequired,
5324 Optional<llvm::function_ref<void()>> CodeCompletionHandler) {
5325 if (standardAttributesAllowed() && (AttrReqs & AR_CXX11AttributesParsed) &&
5326 isCXX11AttributeSpecifier()) {
5327 ParsedAttributesWithRange attrs(AttrFactory);
5328 ParseCXX11Attributes(attrs);
5329 DS.takeAttributesFrom(attrs);
5332 SourceLocation EndLoc;
5335 bool isInvalid = false;
5336 const char *PrevSpec = nullptr;
5337 unsigned DiagID = 0;
5338 SourceLocation Loc = Tok.getLocation();
5340 switch (Tok.getKind()) {
5341 case tok::code_completion:
5342 if (CodeCompletionHandler)
5343 (*CodeCompletionHandler)();
5345 Actions.CodeCompleteTypeQualifiers(DS);
5346 return cutOffParsing();
5349 isInvalid = DS.SetTypeQual(DeclSpec::TQ_const , Loc, PrevSpec, DiagID,
5352 case tok::kw_volatile:
5353 isInvalid = DS.SetTypeQual(DeclSpec::TQ_volatile, Loc, PrevSpec, DiagID,
5356 case tok::kw_restrict:
5357 isInvalid = DS.SetTypeQual(DeclSpec::TQ_restrict, Loc, PrevSpec, DiagID,
5360 case tok::kw__Atomic:
5362 goto DoneWithTypeQuals;
5363 if (!getLangOpts().C11)
5364 Diag(Tok, diag::ext_c11_feature) << Tok.getName();
5365 isInvalid = DS.SetTypeQual(DeclSpec::TQ_atomic, Loc, PrevSpec, DiagID,
5369 // OpenCL qualifiers:
5370 case tok::kw_private:
5371 if (!getLangOpts().OpenCL)
5372 goto DoneWithTypeQuals;
5374 case tok::kw___private:
5375 case tok::kw___global:
5376 case tok::kw___local:
5377 case tok::kw___constant:
5378 case tok::kw___generic:
5379 case tok::kw___read_only:
5380 case tok::kw___write_only:
5381 case tok::kw___read_write:
5382 ParseOpenCLQualifiers(DS.getAttributes());
5385 case tok::kw___unaligned:
5386 isInvalid = DS.SetTypeQual(DeclSpec::TQ_unaligned, Loc, PrevSpec, DiagID,
5389 case tok::kw___uptr:
5390 // GNU libc headers in C mode use '__uptr' as an identifier which conflicts
5391 // with the MS modifier keyword.
5392 if ((AttrReqs & AR_DeclspecAttributesParsed) && !getLangOpts().CPlusPlus &&
5393 IdentifierRequired && DS.isEmpty() && NextToken().is(tok::semi)) {
5394 if (TryKeywordIdentFallback(false))
5398 case tok::kw___sptr:
5400 case tok::kw___ptr64:
5401 case tok::kw___ptr32:
5402 case tok::kw___cdecl:
5403 case tok::kw___stdcall:
5404 case tok::kw___fastcall:
5405 case tok::kw___thiscall:
5406 case tok::kw___regcall:
5407 case tok::kw___vectorcall:
5408 if (AttrReqs & AR_DeclspecAttributesParsed) {
5409 ParseMicrosoftTypeAttributes(DS.getAttributes());
5412 goto DoneWithTypeQuals;
5413 case tok::kw___pascal:
5414 if (AttrReqs & AR_VendorAttributesParsed) {
5415 ParseBorlandTypeAttributes(DS.getAttributes());
5418 goto DoneWithTypeQuals;
5420 // Nullability type specifiers.
5421 case tok::kw__Nonnull:
5422 case tok::kw__Nullable:
5423 case tok::kw__Null_unspecified:
5424 ParseNullabilityTypeSpecifiers(DS.getAttributes());
5427 // Objective-C 'kindof' types.
5428 case tok::kw___kindof:
5429 DS.getAttributes().addNew(Tok.getIdentifierInfo(), Loc, nullptr, Loc,
5430 nullptr, 0, ParsedAttr::AS_Keyword);
5431 (void)ConsumeToken();
5434 case tok::kw___attribute:
5435 if (AttrReqs & AR_GNUAttributesParsedAndRejected)
5436 // When GNU attributes are expressly forbidden, diagnose their usage.
5437 Diag(Tok, diag::err_attributes_not_allowed);
5439 // Parse the attributes even if they are rejected to ensure that error
5440 // recovery is graceful.
5441 if (AttrReqs & AR_GNUAttributesParsed ||
5442 AttrReqs & AR_GNUAttributesParsedAndRejected) {
5443 ParseGNUAttributes(DS.getAttributes());
5444 continue; // do *not* consume the next token!
5446 // otherwise, FALL THROUGH!
5450 // If this is not a type-qualifier token, we're done reading type
5451 // qualifiers. First verify that DeclSpec's are consistent.
5452 DS.Finish(Actions, Actions.getASTContext().getPrintingPolicy());
5453 if (EndLoc.isValid())
5454 DS.SetRangeEnd(EndLoc);
5458 // If the specifier combination wasn't legal, issue a diagnostic.
5460 assert(PrevSpec && "Method did not return previous specifier!");
5461 Diag(Tok, DiagID) << PrevSpec;
5463 EndLoc = ConsumeToken();
5467 /// ParseDeclarator - Parse and verify a newly-initialized declarator.
5469 void Parser::ParseDeclarator(Declarator &D) {
5470 /// This implements the 'declarator' production in the C grammar, then checks
5471 /// for well-formedness and issues diagnostics.
5472 ParseDeclaratorInternal(D, &Parser::ParseDirectDeclarator);
5475 static bool isPtrOperatorToken(tok::TokenKind Kind, const LangOptions &Lang,
5476 DeclaratorContext TheContext) {
5477 if (Kind == tok::star || Kind == tok::caret)
5480 if (Kind == tok::kw_pipe &&
5481 ((Lang.OpenCL && Lang.OpenCLVersion >= 200) || Lang.OpenCLCPlusPlus))
5484 if (!Lang.CPlusPlus)
5487 if (Kind == tok::amp)
5490 // We parse rvalue refs in C++03, because otherwise the errors are scary.
5491 // But we must not parse them in conversion-type-ids and new-type-ids, since
5492 // those can be legitimately followed by a && operator.
5493 // (The same thing can in theory happen after a trailing-return-type, but
5494 // since those are a C++11 feature, there is no rejects-valid issue there.)
5495 if (Kind == tok::ampamp)
5496 return Lang.CPlusPlus11 ||
5497 (TheContext != DeclaratorContext::ConversionIdContext &&
5498 TheContext != DeclaratorContext::CXXNewContext);
5503 // Indicates whether the given declarator is a pipe declarator.
5504 static bool isPipeDeclerator(const Declarator &D) {
5505 const unsigned NumTypes = D.getNumTypeObjects();
5507 for (unsigned Idx = 0; Idx != NumTypes; ++Idx)
5508 if (DeclaratorChunk::Pipe == D.getTypeObject(Idx).Kind)
5514 /// ParseDeclaratorInternal - Parse a C or C++ declarator. The direct-declarator
5515 /// is parsed by the function passed to it. Pass null, and the direct-declarator
5516 /// isn't parsed at all, making this function effectively parse the C++
5517 /// ptr-operator production.
5519 /// If the grammar of this construct is extended, matching changes must also be
5520 /// made to TryParseDeclarator and MightBeDeclarator, and possibly to
5521 /// isConstructorDeclarator.
5523 /// declarator: [C99 6.7.5] [C++ 8p4, dcl.decl]
5524 /// [C] pointer[opt] direct-declarator
5525 /// [C++] direct-declarator
5526 /// [C++] ptr-operator declarator
5528 /// pointer: [C99 6.7.5]
5529 /// '*' type-qualifier-list[opt]
5530 /// '*' type-qualifier-list[opt] pointer
5533 /// '*' cv-qualifier-seq[opt]
5536 /// [GNU] '&' restrict[opt] attributes[opt]
5537 /// [GNU?] '&&' restrict[opt] attributes[opt]
5538 /// '::'[opt] nested-name-specifier '*' cv-qualifier-seq[opt]
5539 void Parser::ParseDeclaratorInternal(Declarator &D,
5540 DirectDeclParseFunction DirectDeclParser) {
5541 if (Diags.hasAllExtensionsSilenced())
5544 // C++ member pointers start with a '::' or a nested-name.
5545 // Member pointers get special handling, since there's no place for the
5546 // scope spec in the generic path below.
5547 if (getLangOpts().CPlusPlus &&
5548 (Tok.is(tok::coloncolon) || Tok.is(tok::kw_decltype) ||
5549 (Tok.is(tok::identifier) &&
5550 (NextToken().is(tok::coloncolon) || NextToken().is(tok::less))) ||
5551 Tok.is(tok::annot_cxxscope))) {
5552 bool EnteringContext =
5553 D.getContext() == DeclaratorContext::FileContext ||
5554 D.getContext() == DeclaratorContext::MemberContext;
5556 ParseOptionalCXXScopeSpecifier(SS, nullptr, EnteringContext);
5558 if (SS.isNotEmpty()) {
5559 if (Tok.isNot(tok::star)) {
5560 // The scope spec really belongs to the direct-declarator.
5561 if (D.mayHaveIdentifier())
5562 D.getCXXScopeSpec() = SS;
5564 AnnotateScopeToken(SS, true);
5566 if (DirectDeclParser)
5567 (this->*DirectDeclParser)(D);
5571 SourceLocation Loc = ConsumeToken();
5573 DeclSpec DS(AttrFactory);
5574 ParseTypeQualifierListOpt(DS);
5575 D.ExtendWithDeclSpec(DS);
5577 // Recurse to parse whatever is left.
5578 ParseDeclaratorInternal(D, DirectDeclParser);
5580 // Sema will have to catch (syntactically invalid) pointers into global
5581 // scope. It has to catch pointers into namespace scope anyway.
5582 D.AddTypeInfo(DeclaratorChunk::getMemberPointer(
5583 SS, DS.getTypeQualifiers(), DS.getEndLoc()),
5584 std::move(DS.getAttributes()),
5585 /* Don't replace range end. */ SourceLocation());
5590 tok::TokenKind Kind = Tok.getKind();
5592 if (D.getDeclSpec().isTypeSpecPipe() && !isPipeDeclerator(D)) {
5593 DeclSpec DS(AttrFactory);
5594 ParseTypeQualifierListOpt(DS);
5597 DeclaratorChunk::getPipe(DS.getTypeQualifiers(), DS.getPipeLoc()),
5598 std::move(DS.getAttributes()), SourceLocation());
5601 // Not a pointer, C++ reference, or block.
5602 if (!isPtrOperatorToken(Kind, getLangOpts(), D.getContext())) {
5603 if (DirectDeclParser)
5604 (this->*DirectDeclParser)(D);
5608 // Otherwise, '*' -> pointer, '^' -> block, '&' -> lvalue reference,
5609 // '&&' -> rvalue reference
5610 SourceLocation Loc = ConsumeToken(); // Eat the *, ^, & or &&.
5613 if (Kind == tok::star || Kind == tok::caret) {
5615 DeclSpec DS(AttrFactory);
5617 // GNU attributes are not allowed here in a new-type-id, but Declspec and
5618 // C++11 attributes are allowed.
5619 unsigned Reqs = AR_CXX11AttributesParsed | AR_DeclspecAttributesParsed |
5620 ((D.getContext() != DeclaratorContext::CXXNewContext)
5621 ? AR_GNUAttributesParsed
5622 : AR_GNUAttributesParsedAndRejected);
5623 ParseTypeQualifierListOpt(DS, Reqs, true, !D.mayOmitIdentifier());
5624 D.ExtendWithDeclSpec(DS);
5626 // Recursively parse the declarator.
5627 ParseDeclaratorInternal(D, DirectDeclParser);
5628 if (Kind == tok::star)
5629 // Remember that we parsed a pointer type, and remember the type-quals.
5630 D.AddTypeInfo(DeclaratorChunk::getPointer(
5631 DS.getTypeQualifiers(), Loc, DS.getConstSpecLoc(),
5632 DS.getVolatileSpecLoc(), DS.getRestrictSpecLoc(),
5633 DS.getAtomicSpecLoc(), DS.getUnalignedSpecLoc()),
5634 std::move(DS.getAttributes()), SourceLocation());
5636 // Remember that we parsed a Block type, and remember the type-quals.
5638 DeclaratorChunk::getBlockPointer(DS.getTypeQualifiers(), Loc),
5639 std::move(DS.getAttributes()), SourceLocation());
5642 DeclSpec DS(AttrFactory);
5644 // Complain about rvalue references in C++03, but then go on and build
5646 if (Kind == tok::ampamp)
5647 Diag(Loc, getLangOpts().CPlusPlus11 ?
5648 diag::warn_cxx98_compat_rvalue_reference :
5649 diag::ext_rvalue_reference);
5651 // GNU-style and C++11 attributes are allowed here, as is restrict.
5652 ParseTypeQualifierListOpt(DS);
5653 D.ExtendWithDeclSpec(DS);
5655 // C++ 8.3.2p1: cv-qualified references are ill-formed except when the
5656 // cv-qualifiers are introduced through the use of a typedef or of a
5657 // template type argument, in which case the cv-qualifiers are ignored.
5658 if (DS.getTypeQualifiers() != DeclSpec::TQ_unspecified) {
5659 if (DS.getTypeQualifiers() & DeclSpec::TQ_const)
5660 Diag(DS.getConstSpecLoc(),
5661 diag::err_invalid_reference_qualifier_application) << "const";
5662 if (DS.getTypeQualifiers() & DeclSpec::TQ_volatile)
5663 Diag(DS.getVolatileSpecLoc(),
5664 diag::err_invalid_reference_qualifier_application) << "volatile";
5665 // 'restrict' is permitted as an extension.
5666 if (DS.getTypeQualifiers() & DeclSpec::TQ_atomic)
5667 Diag(DS.getAtomicSpecLoc(),
5668 diag::err_invalid_reference_qualifier_application) << "_Atomic";
5671 // Recursively parse the declarator.
5672 ParseDeclaratorInternal(D, DirectDeclParser);
5674 if (D.getNumTypeObjects() > 0) {
5675 // C++ [dcl.ref]p4: There shall be no references to references.
5676 DeclaratorChunk& InnerChunk = D.getTypeObject(D.getNumTypeObjects() - 1);
5677 if (InnerChunk.Kind == DeclaratorChunk::Reference) {
5678 if (const IdentifierInfo *II = D.getIdentifier())
5679 Diag(InnerChunk.Loc, diag::err_illegal_decl_reference_to_reference)
5682 Diag(InnerChunk.Loc, diag::err_illegal_decl_reference_to_reference)
5685 // Once we've complained about the reference-to-reference, we
5686 // can go ahead and build the (technically ill-formed)
5687 // declarator: reference collapsing will take care of it.
5691 // Remember that we parsed a reference type.
5692 D.AddTypeInfo(DeclaratorChunk::getReference(DS.getTypeQualifiers(), Loc,
5694 std::move(DS.getAttributes()), SourceLocation());
5698 // When correcting from misplaced brackets before the identifier, the location
5699 // is saved inside the declarator so that other diagnostic messages can use
5700 // them. This extracts and returns that location, or returns the provided
5701 // location if a stored location does not exist.
5702 static SourceLocation getMissingDeclaratorIdLoc(Declarator &D,
5703 SourceLocation Loc) {
5704 if (D.getName().StartLocation.isInvalid() &&
5705 D.getName().EndLocation.isValid())
5706 return D.getName().EndLocation;
5711 /// ParseDirectDeclarator
5712 /// direct-declarator: [C99 6.7.5]
5713 /// [C99] identifier
5714 /// '(' declarator ')'
5715 /// [GNU] '(' attributes declarator ')'
5716 /// [C90] direct-declarator '[' constant-expression[opt] ']'
5717 /// [C99] direct-declarator '[' type-qual-list[opt] assignment-expr[opt] ']'
5718 /// [C99] direct-declarator '[' 'static' type-qual-list[opt] assign-expr ']'
5719 /// [C99] direct-declarator '[' type-qual-list 'static' assignment-expr ']'
5720 /// [C99] direct-declarator '[' type-qual-list[opt] '*' ']'
5721 /// [C++11] direct-declarator '[' constant-expression[opt] ']'
5722 /// attribute-specifier-seq[opt]
5723 /// direct-declarator '(' parameter-type-list ')'
5724 /// direct-declarator '(' identifier-list[opt] ')'
5725 /// [GNU] direct-declarator '(' parameter-forward-declarations
5726 /// parameter-type-list[opt] ')'
5727 /// [C++] direct-declarator '(' parameter-declaration-clause ')'
5728 /// cv-qualifier-seq[opt] exception-specification[opt]
5729 /// [C++11] direct-declarator '(' parameter-declaration-clause ')'
5730 /// attribute-specifier-seq[opt] cv-qualifier-seq[opt]
5731 /// ref-qualifier[opt] exception-specification[opt]
5732 /// [C++] declarator-id
5733 /// [C++11] declarator-id attribute-specifier-seq[opt]
5735 /// declarator-id: [C++ 8]
5736 /// '...'[opt] id-expression
5737 /// '::'[opt] nested-name-specifier[opt] type-name
5739 /// id-expression: [C++ 5.1]
5743 /// unqualified-id: [C++ 5.1]
5745 /// operator-function-id
5746 /// conversion-function-id
5750 /// C++17 adds the following, which we also handle here:
5752 /// simple-declaration:
5753 /// <decl-spec> '[' identifier-list ']' brace-or-equal-initializer ';'
5755 /// Note, any additional constructs added here may need corresponding changes
5756 /// in isConstructorDeclarator.
5757 void Parser::ParseDirectDeclarator(Declarator &D) {
5758 DeclaratorScopeObj DeclScopeObj(*this, D.getCXXScopeSpec());
5760 if (getLangOpts().CPlusPlus && D.mayHaveIdentifier()) {
5761 // This might be a C++17 structured binding.
5762 if (Tok.is(tok::l_square) && !D.mayOmitIdentifier() &&
5763 D.getCXXScopeSpec().isEmpty())
5764 return ParseDecompositionDeclarator(D);
5766 // Don't parse FOO:BAR as if it were a typo for FOO::BAR inside a class, in
5767 // this context it is a bitfield. Also in range-based for statement colon
5768 // may delimit for-range-declaration.
5769 ColonProtectionRAIIObject X(
5770 *this, D.getContext() == DeclaratorContext::MemberContext ||
5771 (D.getContext() == DeclaratorContext::ForContext &&
5772 getLangOpts().CPlusPlus11));
5774 // ParseDeclaratorInternal might already have parsed the scope.
5775 if (D.getCXXScopeSpec().isEmpty()) {
5776 bool EnteringContext =
5777 D.getContext() == DeclaratorContext::FileContext ||
5778 D.getContext() == DeclaratorContext::MemberContext;
5779 ParseOptionalCXXScopeSpecifier(D.getCXXScopeSpec(), nullptr,
5783 if (D.getCXXScopeSpec().isValid()) {
5784 if (Actions.ShouldEnterDeclaratorScope(getCurScope(),
5785 D.getCXXScopeSpec()))
5786 // Change the declaration context for name lookup, until this function
5787 // is exited (and the declarator has been parsed).
5788 DeclScopeObj.EnterDeclaratorScope();
5789 else if (getObjCDeclContext()) {
5790 // Ensure that we don't interpret the next token as an identifier when
5791 // dealing with declarations in an Objective-C container.
5792 D.SetIdentifier(nullptr, Tok.getLocation());
5793 D.setInvalidType(true);
5795 goto PastIdentifier;
5799 // C++0x [dcl.fct]p14:
5800 // There is a syntactic ambiguity when an ellipsis occurs at the end of a
5801 // parameter-declaration-clause without a preceding comma. In this case,
5802 // the ellipsis is parsed as part of the abstract-declarator if the type
5803 // of the parameter either names a template parameter pack that has not
5804 // been expanded or contains auto; otherwise, it is parsed as part of the
5805 // parameter-declaration-clause.
5806 if (Tok.is(tok::ellipsis) && D.getCXXScopeSpec().isEmpty() &&
5807 !((D.getContext() == DeclaratorContext::PrototypeContext ||
5808 D.getContext() == DeclaratorContext::LambdaExprParameterContext ||
5809 D.getContext() == DeclaratorContext::BlockLiteralContext) &&
5810 NextToken().is(tok::r_paren) &&
5811 !D.hasGroupingParens() &&
5812 !Actions.containsUnexpandedParameterPacks(D) &&
5813 D.getDeclSpec().getTypeSpecType() != TST_auto)) {
5814 SourceLocation EllipsisLoc = ConsumeToken();
5815 if (isPtrOperatorToken(Tok.getKind(), getLangOpts(), D.getContext())) {
5816 // The ellipsis was put in the wrong place. Recover, and explain to
5817 // the user what they should have done.
5819 if (EllipsisLoc.isValid())
5820 DiagnoseMisplacedEllipsisInDeclarator(EllipsisLoc, D);
5823 D.setEllipsisLoc(EllipsisLoc);
5825 // The ellipsis can't be followed by a parenthesized declarator. We
5826 // check for that in ParseParenDeclarator, after we have disambiguated
5827 // the l_paren token.
5830 if (Tok.isOneOf(tok::identifier, tok::kw_operator, tok::annot_template_id,
5832 // We found something that indicates the start of an unqualified-id.
5833 // Parse that unqualified-id.
5834 bool AllowConstructorName;
5835 bool AllowDeductionGuide;
5836 if (D.getDeclSpec().hasTypeSpecifier()) {
5837 AllowConstructorName = false;
5838 AllowDeductionGuide = false;
5839 } else if (D.getCXXScopeSpec().isSet()) {
5840 AllowConstructorName =
5841 (D.getContext() == DeclaratorContext::FileContext ||
5842 D.getContext() == DeclaratorContext::MemberContext);
5843 AllowDeductionGuide = false;
5845 AllowConstructorName =
5846 (D.getContext() == DeclaratorContext::MemberContext);
5847 AllowDeductionGuide =
5848 (D.getContext() == DeclaratorContext::FileContext ||
5849 D.getContext() == DeclaratorContext::MemberContext);
5852 bool HadScope = D.getCXXScopeSpec().isValid();
5853 if (ParseUnqualifiedId(D.getCXXScopeSpec(),
5854 /*EnteringContext=*/true,
5855 /*AllowDestructorName=*/true, AllowConstructorName,
5856 AllowDeductionGuide, nullptr, nullptr,
5858 // Once we're past the identifier, if the scope was bad, mark the
5859 // whole declarator bad.
5860 D.getCXXScopeSpec().isInvalid()) {
5861 D.SetIdentifier(nullptr, Tok.getLocation());
5862 D.setInvalidType(true);
5864 // ParseUnqualifiedId might have parsed a scope specifier during error
5865 // recovery. If it did so, enter that scope.
5866 if (!HadScope && D.getCXXScopeSpec().isValid() &&
5867 Actions.ShouldEnterDeclaratorScope(getCurScope(),
5868 D.getCXXScopeSpec()))
5869 DeclScopeObj.EnterDeclaratorScope();
5871 // Parsed the unqualified-id; update range information and move along.
5872 if (D.getSourceRange().getBegin().isInvalid())
5873 D.SetRangeBegin(D.getName().getSourceRange().getBegin());
5874 D.SetRangeEnd(D.getName().getSourceRange().getEnd());
5876 goto PastIdentifier;
5879 if (D.getCXXScopeSpec().isNotEmpty()) {
5880 // We have a scope specifier but no following unqualified-id.
5881 Diag(PP.getLocForEndOfToken(D.getCXXScopeSpec().getEndLoc()),
5882 diag::err_expected_unqualified_id)
5884 D.SetIdentifier(nullptr, Tok.getLocation());
5885 goto PastIdentifier;
5887 } else if (Tok.is(tok::identifier) && D.mayHaveIdentifier()) {
5888 assert(!getLangOpts().CPlusPlus &&
5889 "There's a C++-specific check for tok::identifier above");
5890 assert(Tok.getIdentifierInfo() && "Not an identifier?");
5891 D.SetIdentifier(Tok.getIdentifierInfo(), Tok.getLocation());
5892 D.SetRangeEnd(Tok.getLocation());
5894 goto PastIdentifier;
5895 } else if (Tok.is(tok::identifier) && !D.mayHaveIdentifier()) {
5896 // We're not allowed an identifier here, but we got one. Try to figure out
5897 // if the user was trying to attach a name to the type, or whether the name
5898 // is some unrelated trailing syntax.
5899 bool DiagnoseIdentifier = false;
5900 if (D.hasGroupingParens())
5901 // An identifier within parens is unlikely to be intended to be anything
5902 // other than a name being "declared".
5903 DiagnoseIdentifier = true;
5904 else if (D.getContext() == DeclaratorContext::TemplateArgContext)
5905 // T<int N> is an accidental identifier; T<int N indicates a missing '>'.
5906 DiagnoseIdentifier =
5907 NextToken().isOneOf(tok::comma, tok::greater, tok::greatergreater);
5908 else if (D.getContext() == DeclaratorContext::AliasDeclContext ||
5909 D.getContext() == DeclaratorContext::AliasTemplateContext)
5910 // The most likely error is that the ';' was forgotten.
5911 DiagnoseIdentifier = NextToken().isOneOf(tok::comma, tok::semi);
5912 else if ((D.getContext() == DeclaratorContext::TrailingReturnContext ||
5913 D.getContext() == DeclaratorContext::TrailingReturnVarContext) &&
5914 !isCXX11VirtSpecifier(Tok))
5915 DiagnoseIdentifier = NextToken().isOneOf(
5916 tok::comma, tok::semi, tok::equal, tok::l_brace, tok::kw_try);
5917 if (DiagnoseIdentifier) {
5918 Diag(Tok.getLocation(), diag::err_unexpected_unqualified_id)
5919 << FixItHint::CreateRemoval(Tok.getLocation());
5920 D.SetIdentifier(nullptr, Tok.getLocation());
5922 goto PastIdentifier;
5926 if (Tok.is(tok::l_paren)) {
5927 // If this might be an abstract-declarator followed by a direct-initializer,
5928 // check whether this is a valid declarator chunk. If it can't be, assume
5929 // that it's an initializer instead.
5930 if (D.mayOmitIdentifier() && D.mayBeFollowedByCXXDirectInit()) {
5931 RevertingTentativeParsingAction PA(*this);
5932 if (TryParseDeclarator(true, D.mayHaveIdentifier(), true) ==
5934 D.SetIdentifier(nullptr, Tok.getLocation());
5935 goto PastIdentifier;
5939 // direct-declarator: '(' declarator ')'
5940 // direct-declarator: '(' attributes declarator ')'
5941 // Example: 'char (*X)' or 'int (*XX)(void)'
5942 ParseParenDeclarator(D);
5944 // If the declarator was parenthesized, we entered the declarator
5945 // scope when parsing the parenthesized declarator, then exited
5946 // the scope already. Re-enter the scope, if we need to.
5947 if (D.getCXXScopeSpec().isSet()) {
5948 // If there was an error parsing parenthesized declarator, declarator
5949 // scope may have been entered before. Don't do it again.
5950 if (!D.isInvalidType() &&
5951 Actions.ShouldEnterDeclaratorScope(getCurScope(),
5952 D.getCXXScopeSpec()))
5953 // Change the declaration context for name lookup, until this function
5954 // is exited (and the declarator has been parsed).
5955 DeclScopeObj.EnterDeclaratorScope();
5957 } else if (D.mayOmitIdentifier()) {
5958 // This could be something simple like "int" (in which case the declarator
5959 // portion is empty), if an abstract-declarator is allowed.
5960 D.SetIdentifier(nullptr, Tok.getLocation());
5962 // The grammar for abstract-pack-declarator does not allow grouping parens.
5963 // FIXME: Revisit this once core issue 1488 is resolved.
5964 if (D.hasEllipsis() && D.hasGroupingParens())
5965 Diag(PP.getLocForEndOfToken(D.getEllipsisLoc()),
5966 diag::ext_abstract_pack_declarator_parens);
5968 if (Tok.getKind() == tok::annot_pragma_parser_crash)
5970 if (Tok.is(tok::l_square))
5971 return ParseMisplacedBracketDeclarator(D);
5972 if (D.getContext() == DeclaratorContext::MemberContext) {
5973 // Objective-C++: Detect C++ keywords and try to prevent further errors by
5974 // treating these keyword as valid member names.
5975 if (getLangOpts().ObjC && getLangOpts().CPlusPlus &&
5976 Tok.getIdentifierInfo() &&
5977 Tok.getIdentifierInfo()->isCPlusPlusKeyword(getLangOpts())) {
5978 Diag(getMissingDeclaratorIdLoc(D, Tok.getLocation()),
5979 diag::err_expected_member_name_or_semi_objcxx_keyword)
5980 << Tok.getIdentifierInfo()
5981 << (D.getDeclSpec().isEmpty() ? SourceRange()
5982 : D.getDeclSpec().getSourceRange());
5983 D.SetIdentifier(Tok.getIdentifierInfo(), Tok.getLocation());
5984 D.SetRangeEnd(Tok.getLocation());
5986 goto PastIdentifier;
5988 Diag(getMissingDeclaratorIdLoc(D, Tok.getLocation()),
5989 diag::err_expected_member_name_or_semi)
5990 << (D.getDeclSpec().isEmpty() ? SourceRange()
5991 : D.getDeclSpec().getSourceRange());
5992 } else if (getLangOpts().CPlusPlus) {
5993 if (Tok.isOneOf(tok::period, tok::arrow))
5994 Diag(Tok, diag::err_invalid_operator_on_type) << Tok.is(tok::arrow);
5996 SourceLocation Loc = D.getCXXScopeSpec().getEndLoc();
5997 if (Tok.isAtStartOfLine() && Loc.isValid())
5998 Diag(PP.getLocForEndOfToken(Loc), diag::err_expected_unqualified_id)
5999 << getLangOpts().CPlusPlus;
6001 Diag(getMissingDeclaratorIdLoc(D, Tok.getLocation()),
6002 diag::err_expected_unqualified_id)
6003 << getLangOpts().CPlusPlus;
6006 Diag(getMissingDeclaratorIdLoc(D, Tok.getLocation()),
6007 diag::err_expected_either)
6008 << tok::identifier << tok::l_paren;
6010 D.SetIdentifier(nullptr, Tok.getLocation());
6011 D.setInvalidType(true);
6015 assert(D.isPastIdentifier() &&
6016 "Haven't past the location of the identifier yet?");
6018 // Don't parse attributes unless we have parsed an unparenthesized name.
6019 if (D.hasName() && !D.getNumTypeObjects())
6020 MaybeParseCXX11Attributes(D);
6023 if (Tok.is(tok::l_paren)) {
6024 // Enter function-declaration scope, limiting any declarators to the
6025 // function prototype scope, including parameter declarators.
6026 ParseScope PrototypeScope(this,
6027 Scope::FunctionPrototypeScope|Scope::DeclScope|
6028 (D.isFunctionDeclaratorAFunctionDeclaration()
6029 ? Scope::FunctionDeclarationScope : 0));
6031 // The paren may be part of a C++ direct initializer, eg. "int x(1);".
6032 // In such a case, check if we actually have a function declarator; if it
6033 // is not, the declarator has been fully parsed.
6034 bool IsAmbiguous = false;
6035 if (getLangOpts().CPlusPlus && D.mayBeFollowedByCXXDirectInit()) {
6036 // The name of the declarator, if any, is tentatively declared within
6037 // a possible direct initializer.
6038 TentativelyDeclaredIdentifiers.push_back(D.getIdentifier());
6039 bool IsFunctionDecl = isCXXFunctionDeclarator(&IsAmbiguous);
6040 TentativelyDeclaredIdentifiers.pop_back();
6041 if (!IsFunctionDecl)
6044 ParsedAttributes attrs(AttrFactory);
6045 BalancedDelimiterTracker T(*this, tok::l_paren);
6047 ParseFunctionDeclarator(D, attrs, T, IsAmbiguous);
6048 PrototypeScope.Exit();
6049 } else if (Tok.is(tok::l_square)) {
6050 ParseBracketDeclarator(D);
6051 } else if (Tok.is(tok::kw_requires) && D.hasGroupingParens()) {
6052 // This declarator is declaring a function, but the requires clause is
6053 // in the wrong place:
6054 // void (f() requires true);
6056 // void f() requires true;
6058 // void (f()) requires true;
6059 Diag(Tok, diag::err_requires_clause_inside_parens);
6061 ExprResult TrailingRequiresClause = Actions.CorrectDelayedTyposInExpr(
6062 ParseConstraintLogicalOrExpression(/*IsTrailingRequiresClause=*/true));
6063 if (TrailingRequiresClause.isUsable() && D.isFunctionDeclarator() &&
6064 !D.hasTrailingRequiresClause())
6065 // We're already ill-formed if we got here but we'll accept it anyway.
6066 D.setTrailingRequiresClause(TrailingRequiresClause.get());
6073 void Parser::ParseDecompositionDeclarator(Declarator &D) {
6074 assert(Tok.is(tok::l_square));
6076 // If this doesn't look like a structured binding, maybe it's a misplaced
6077 // array declarator.
6078 // FIXME: Consume the l_square first so we don't need extra lookahead for
6080 if (!(NextToken().is(tok::identifier) &&
6081 GetLookAheadToken(2).isOneOf(tok::comma, tok::r_square)) &&
6082 !(NextToken().is(tok::r_square) &&
6083 GetLookAheadToken(2).isOneOf(tok::equal, tok::l_brace)))
6084 return ParseMisplacedBracketDeclarator(D);
6086 BalancedDelimiterTracker T(*this, tok::l_square);
6089 SmallVector<DecompositionDeclarator::Binding, 32> Bindings;
6090 while (Tok.isNot(tok::r_square)) {
6091 if (!Bindings.empty()) {
6092 if (Tok.is(tok::comma))
6095 if (Tok.is(tok::identifier)) {
6096 SourceLocation EndLoc = getEndOfPreviousToken();
6097 Diag(EndLoc, diag::err_expected)
6098 << tok::comma << FixItHint::CreateInsertion(EndLoc, ",");
6100 Diag(Tok, diag::err_expected_comma_or_rsquare);
6103 SkipUntil(tok::r_square, tok::comma, tok::identifier,
6104 StopAtSemi | StopBeforeMatch);
6105 if (Tok.is(tok::comma))
6107 else if (Tok.isNot(tok::identifier))
6112 if (Tok.isNot(tok::identifier)) {
6113 Diag(Tok, diag::err_expected) << tok::identifier;
6117 Bindings.push_back({Tok.getIdentifierInfo(), Tok.getLocation()});
6121 if (Tok.isNot(tok::r_square))
6122 // We've already diagnosed a problem here.
6125 // C++17 does not allow the identifier-list in a structured binding
6127 if (Bindings.empty())
6128 Diag(Tok.getLocation(), diag::ext_decomp_decl_empty);
6133 return D.setDecompositionBindings(T.getOpenLocation(), Bindings,
6134 T.getCloseLocation());
6137 /// ParseParenDeclarator - We parsed the declarator D up to a paren. This is
6138 /// only called before the identifier, so these are most likely just grouping
6139 /// parens for precedence. If we find that these are actually function
6140 /// parameter parens in an abstract-declarator, we call ParseFunctionDeclarator.
6142 /// direct-declarator:
6143 /// '(' declarator ')'
6144 /// [GNU] '(' attributes declarator ')'
6145 /// direct-declarator '(' parameter-type-list ')'
6146 /// direct-declarator '(' identifier-list[opt] ')'
6147 /// [GNU] direct-declarator '(' parameter-forward-declarations
6148 /// parameter-type-list[opt] ')'
6150 void Parser::ParseParenDeclarator(Declarator &D) {
6151 BalancedDelimiterTracker T(*this, tok::l_paren);
6154 assert(!D.isPastIdentifier() && "Should be called before passing identifier");
6156 // Eat any attributes before we look at whether this is a grouping or function
6157 // declarator paren. If this is a grouping paren, the attribute applies to
6158 // the type being built up, for example:
6159 // int (__attribute__(()) *x)(long y)
6160 // If this ends up not being a grouping paren, the attribute applies to the
6161 // first argument, for example:
6162 // int (__attribute__(()) int x)
6163 // In either case, we need to eat any attributes to be able to determine what
6164 // sort of paren this is.
6166 ParsedAttributes attrs(AttrFactory);
6167 bool RequiresArg = false;
6168 if (Tok.is(tok::kw___attribute)) {
6169 ParseGNUAttributes(attrs);
6171 // We require that the argument list (if this is a non-grouping paren) be
6172 // present even if the attribute list was empty.
6176 // Eat any Microsoft extensions.
6177 ParseMicrosoftTypeAttributes(attrs);
6179 // Eat any Borland extensions.
6180 if (Tok.is(tok::kw___pascal))
6181 ParseBorlandTypeAttributes(attrs);
6183 // If we haven't past the identifier yet (or where the identifier would be
6184 // stored, if this is an abstract declarator), then this is probably just
6185 // grouping parens. However, if this could be an abstract-declarator, then
6186 // this could also be the start of function arguments (consider 'void()').
6189 if (!D.mayOmitIdentifier()) {
6190 // If this can't be an abstract-declarator, this *must* be a grouping
6191 // paren, because we haven't seen the identifier yet.
6193 } else if (Tok.is(tok::r_paren) || // 'int()' is a function.
6194 (getLangOpts().CPlusPlus && Tok.is(tok::ellipsis) &&
6195 NextToken().is(tok::r_paren)) || // C++ int(...)
6196 isDeclarationSpecifier() || // 'int(int)' is a function.
6197 isCXX11AttributeSpecifier()) { // 'int([[]]int)' is a function.
6198 // This handles C99 6.7.5.3p11: in "typedef int X; void foo(X)", X is
6199 // considered to be a type, not a K&R identifier-list.
6202 // Otherwise, this is a grouping paren, e.g. 'int (*X)' or 'int(X)'.
6206 // If this is a grouping paren, handle:
6207 // direct-declarator: '(' declarator ')'
6208 // direct-declarator: '(' attributes declarator ')'
6210 SourceLocation EllipsisLoc = D.getEllipsisLoc();
6211 D.setEllipsisLoc(SourceLocation());
6213 bool hadGroupingParens = D.hasGroupingParens();
6214 D.setGroupingParens(true);
6215 ParseDeclaratorInternal(D, &Parser::ParseDirectDeclarator);
6219 DeclaratorChunk::getParen(T.getOpenLocation(), T.getCloseLocation()),
6220 std::move(attrs), T.getCloseLocation());
6222 D.setGroupingParens(hadGroupingParens);
6224 // An ellipsis cannot be placed outside parentheses.
6225 if (EllipsisLoc.isValid())
6226 DiagnoseMisplacedEllipsisInDeclarator(EllipsisLoc, D);
6231 // Okay, if this wasn't a grouping paren, it must be the start of a function
6232 // argument list. Recognize that this declarator will never have an
6233 // identifier (and remember where it would have been), then call into
6234 // ParseFunctionDeclarator to handle of argument list.
6235 D.SetIdentifier(nullptr, Tok.getLocation());
6237 // Enter function-declaration scope, limiting any declarators to the
6238 // function prototype scope, including parameter declarators.
6239 ParseScope PrototypeScope(this,
6240 Scope::FunctionPrototypeScope | Scope::DeclScope |
6241 (D.isFunctionDeclaratorAFunctionDeclaration()
6242 ? Scope::FunctionDeclarationScope : 0));
6243 ParseFunctionDeclarator(D, attrs, T, false, RequiresArg);
6244 PrototypeScope.Exit();
6247 void Parser::InitCXXThisScopeForDeclaratorIfRelevant(
6248 const Declarator &D, const DeclSpec &DS,
6249 llvm::Optional<Sema::CXXThisScopeRAII> &ThisScope) {
6250 // C++11 [expr.prim.general]p3:
6251 // If a declaration declares a member function or member function
6252 // template of a class X, the expression this is a prvalue of type
6253 // "pointer to cv-qualifier-seq X" between the optional cv-qualifer-seq
6254 // and the end of the function-definition, member-declarator, or
6256 // FIXME: currently, "static" case isn't handled correctly.
6257 bool IsCXX11MemberFunction = getLangOpts().CPlusPlus11 &&
6258 D.getDeclSpec().getStorageClassSpec() != DeclSpec::SCS_typedef &&
6259 (D.getContext() == DeclaratorContext::MemberContext
6260 ? !D.getDeclSpec().isFriendSpecified()
6261 : D.getContext() == DeclaratorContext::FileContext &&
6262 D.getCXXScopeSpec().isValid() &&
6263 Actions.CurContext->isRecord());
6264 if (!IsCXX11MemberFunction)
6267 Qualifiers Q = Qualifiers::fromCVRUMask(DS.getTypeQualifiers());
6268 if (D.getDeclSpec().hasConstexprSpecifier() && !getLangOpts().CPlusPlus14)
6270 // FIXME: Collect C++ address spaces.
6271 // If there are multiple different address spaces, the source is invalid.
6272 // Carry on using the first addr space for the qualifiers of 'this'.
6273 // The diagnostic will be given later while creating the function
6274 // prototype for the method.
6275 if (getLangOpts().OpenCLCPlusPlus) {
6276 for (ParsedAttr &attr : DS.getAttributes()) {
6277 LangAS ASIdx = attr.asOpenCLLangAS();
6278 if (ASIdx != LangAS::Default) {
6279 Q.addAddressSpace(ASIdx);
6284 ThisScope.emplace(Actions, dyn_cast<CXXRecordDecl>(Actions.CurContext), Q,
6285 IsCXX11MemberFunction);
6288 /// ParseFunctionDeclarator - We are after the identifier and have parsed the
6289 /// declarator D up to a paren, which indicates that we are parsing function
6292 /// If FirstArgAttrs is non-null, then the caller parsed those arguments
6293 /// immediately after the open paren - they should be considered to be the
6294 /// first argument of a parameter.
6296 /// If RequiresArg is true, then the first argument of the function is required
6297 /// to be present and required to not be an identifier list.
6299 /// For C++, after the parameter-list, it also parses the cv-qualifier-seq[opt],
6300 /// (C++11) ref-qualifier[opt], exception-specification[opt],
6301 /// (C++11) attribute-specifier-seq[opt], (C++11) trailing-return-type[opt] and
6302 /// (C++2a) the trailing requires-clause.
6304 /// [C++11] exception-specification:
6305 /// dynamic-exception-specification
6306 /// noexcept-specification
6308 void Parser::ParseFunctionDeclarator(Declarator &D,
6309 ParsedAttributes &FirstArgAttrs,
6310 BalancedDelimiterTracker &Tracker,
6313 assert(getCurScope()->isFunctionPrototypeScope() &&
6314 "Should call from a Function scope");
6315 // lparen is already consumed!
6316 assert(D.isPastIdentifier() && "Should not call before identifier!");
6318 // This should be true when the function has typed arguments.
6319 // Otherwise, it is treated as a K&R-style function.
6320 bool HasProto = false;
6321 // Build up an array of information about the parsed arguments.
6322 SmallVector<DeclaratorChunk::ParamInfo, 16> ParamInfo;
6323 // Remember where we see an ellipsis, if any.
6324 SourceLocation EllipsisLoc;
6326 DeclSpec DS(AttrFactory);
6327 bool RefQualifierIsLValueRef = true;
6328 SourceLocation RefQualifierLoc;
6329 ExceptionSpecificationType ESpecType = EST_None;
6330 SourceRange ESpecRange;
6331 SmallVector<ParsedType, 2> DynamicExceptions;
6332 SmallVector<SourceRange, 2> DynamicExceptionRanges;
6333 ExprResult NoexceptExpr;
6334 CachedTokens *ExceptionSpecTokens = nullptr;
6335 ParsedAttributesWithRange FnAttrs(AttrFactory);
6336 TypeResult TrailingReturnType;
6338 /* LocalEndLoc is the end location for the local FunctionTypeLoc.
6339 EndLoc is the end location for the function declarator.
6340 They differ for trailing return types. */
6341 SourceLocation StartLoc, LocalEndLoc, EndLoc;
6342 SourceLocation LParenLoc, RParenLoc;
6343 LParenLoc = Tracker.getOpenLocation();
6344 StartLoc = LParenLoc;
6346 if (isFunctionDeclaratorIdentifierList()) {
6348 Diag(Tok, diag::err_argument_required_after_attribute);
6350 ParseFunctionDeclaratorIdentifierList(D, ParamInfo);
6352 Tracker.consumeClose();
6353 RParenLoc = Tracker.getCloseLocation();
6354 LocalEndLoc = RParenLoc;
6357 // If there are attributes following the identifier list, parse them and
6359 MaybeParseCXX11Attributes(FnAttrs);
6360 ProhibitAttributes(FnAttrs);
6362 if (Tok.isNot(tok::r_paren))
6363 ParseParameterDeclarationClause(D, FirstArgAttrs, ParamInfo,
6365 else if (RequiresArg)
6366 Diag(Tok, diag::err_argument_required_after_attribute);
6368 HasProto = ParamInfo.size() || getLangOpts().CPlusPlus
6369 || getLangOpts().OpenCL;
6371 // If we have the closing ')', eat it.
6372 Tracker.consumeClose();
6373 RParenLoc = Tracker.getCloseLocation();
6374 LocalEndLoc = RParenLoc;
6377 if (getLangOpts().CPlusPlus) {
6378 // FIXME: Accept these components in any order, and produce fixits to
6379 // correct the order if the user gets it wrong. Ideally we should deal
6380 // with the pure-specifier in the same way.
6382 // Parse cv-qualifier-seq[opt].
6383 ParseTypeQualifierListOpt(DS, AR_NoAttributesParsed,
6384 /*AtomicAllowed*/ false,
6385 /*IdentifierRequired=*/false,
6386 llvm::function_ref<void()>([&]() {
6387 Actions.CodeCompleteFunctionQualifiers(DS, D);
6389 if (!DS.getSourceRange().getEnd().isInvalid()) {
6390 EndLoc = DS.getSourceRange().getEnd();
6393 // Parse ref-qualifier[opt].
6394 if (ParseRefQualifier(RefQualifierIsLValueRef, RefQualifierLoc))
6395 EndLoc = RefQualifierLoc;
6397 llvm::Optional<Sema::CXXThisScopeRAII> ThisScope;
6398 InitCXXThisScopeForDeclaratorIfRelevant(D, DS, ThisScope);
6400 // Parse exception-specification[opt].
6401 bool Delayed = D.isFirstDeclarationOfMember() &&
6402 D.isFunctionDeclaratorAFunctionDeclaration();
6403 if (Delayed && Actions.isLibstdcxxEagerExceptionSpecHack(D) &&
6404 GetLookAheadToken(0).is(tok::kw_noexcept) &&
6405 GetLookAheadToken(1).is(tok::l_paren) &&
6406 GetLookAheadToken(2).is(tok::kw_noexcept) &&
6407 GetLookAheadToken(3).is(tok::l_paren) &&
6408 GetLookAheadToken(4).is(tok::identifier) &&
6409 GetLookAheadToken(4).getIdentifierInfo()->isStr("swap")) {
6410 // HACK: We've got an exception-specification
6411 // noexcept(noexcept(swap(...)))
6413 // noexcept(noexcept(swap(...)) && noexcept(swap(...)))
6414 // on a 'swap' member function. This is a libstdc++ bug; the lookup
6415 // for 'swap' will only find the function we're currently declaring,
6416 // whereas it expects to find a non-member swap through ADL. Turn off
6417 // delayed parsing to give it a chance to find what it expects.
6420 ESpecType = tryParseExceptionSpecification(Delayed,
6423 DynamicExceptionRanges,
6425 ExceptionSpecTokens);
6426 if (ESpecType != EST_None)
6427 EndLoc = ESpecRange.getEnd();
6429 // Parse attribute-specifier-seq[opt]. Per DR 979 and DR 1297, this goes
6430 // after the exception-specification.
6431 MaybeParseCXX11Attributes(FnAttrs);
6433 // Parse trailing-return-type[opt].
6434 LocalEndLoc = EndLoc;
6435 if (getLangOpts().CPlusPlus11 && Tok.is(tok::arrow)) {
6436 Diag(Tok, diag::warn_cxx98_compat_trailing_return_type);
6437 if (D.getDeclSpec().getTypeSpecType() == TST_auto)
6438 StartLoc = D.getDeclSpec().getTypeSpecTypeLoc();
6439 LocalEndLoc = Tok.getLocation();
6441 TrailingReturnType =
6442 ParseTrailingReturnType(Range, D.mayBeFollowedByCXXDirectInit());
6443 EndLoc = Range.getEnd();
6445 } else if (standardAttributesAllowed()) {
6446 MaybeParseCXX11Attributes(FnAttrs);
6450 // Collect non-parameter declarations from the prototype if this is a function
6451 // declaration. They will be moved into the scope of the function. Only do
6452 // this in C and not C++, where the decls will continue to live in the
6453 // surrounding context.
6454 SmallVector<NamedDecl *, 0> DeclsInPrototype;
6455 if (getCurScope()->getFlags() & Scope::FunctionDeclarationScope &&
6456 !getLangOpts().CPlusPlus) {
6457 for (Decl *D : getCurScope()->decls()) {
6458 NamedDecl *ND = dyn_cast<NamedDecl>(D);
6459 if (!ND || isa<ParmVarDecl>(ND))
6461 DeclsInPrototype.push_back(ND);
6465 // Remember that we parsed a function type, and remember the attributes.
6466 D.AddTypeInfo(DeclaratorChunk::getFunction(
6467 HasProto, IsAmbiguous, LParenLoc, ParamInfo.data(),
6468 ParamInfo.size(), EllipsisLoc, RParenLoc,
6469 RefQualifierIsLValueRef, RefQualifierLoc,
6470 /*MutableLoc=*/SourceLocation(),
6471 ESpecType, ESpecRange, DynamicExceptions.data(),
6472 DynamicExceptionRanges.data(), DynamicExceptions.size(),
6473 NoexceptExpr.isUsable() ? NoexceptExpr.get() : nullptr,
6474 ExceptionSpecTokens, DeclsInPrototype, StartLoc,
6475 LocalEndLoc, D, TrailingReturnType, &DS),
6476 std::move(FnAttrs), EndLoc);
6479 /// ParseRefQualifier - Parses a member function ref-qualifier. Returns
6480 /// true if a ref-qualifier is found.
6481 bool Parser::ParseRefQualifier(bool &RefQualifierIsLValueRef,
6482 SourceLocation &RefQualifierLoc) {
6483 if (Tok.isOneOf(tok::amp, tok::ampamp)) {
6484 Diag(Tok, getLangOpts().CPlusPlus11 ?
6485 diag::warn_cxx98_compat_ref_qualifier :
6486 diag::ext_ref_qualifier);
6488 RefQualifierIsLValueRef = Tok.is(tok::amp);
6489 RefQualifierLoc = ConsumeToken();
6495 /// isFunctionDeclaratorIdentifierList - This parameter list may have an
6496 /// identifier list form for a K&R-style function: void foo(a,b,c)
6498 /// Note that identifier-lists are only allowed for normal declarators, not for
6499 /// abstract-declarators.
6500 bool Parser::isFunctionDeclaratorIdentifierList() {
6501 return !getLangOpts().CPlusPlus
6502 && Tok.is(tok::identifier)
6503 && !TryAltiVecVectorToken()
6504 // K&R identifier lists can't have typedefs as identifiers, per C99
6506 && (TryAnnotateTypeOrScopeToken() || !Tok.is(tok::annot_typename))
6507 // Identifier lists follow a really simple grammar: the identifiers can
6508 // be followed *only* by a ", identifier" or ")". However, K&R
6509 // identifier lists are really rare in the brave new modern world, and
6510 // it is very common for someone to typo a type in a non-K&R style
6511 // list. If we are presented with something like: "void foo(intptr x,
6512 // float y)", we don't want to start parsing the function declarator as
6513 // though it is a K&R style declarator just because intptr is an
6516 // To handle this, we check to see if the token after the first
6517 // identifier is a "," or ")". Only then do we parse it as an
6519 && (!Tok.is(tok::eof) &&
6520 (NextToken().is(tok::comma) || NextToken().is(tok::r_paren)));
6523 /// ParseFunctionDeclaratorIdentifierList - While parsing a function declarator
6524 /// we found a K&R-style identifier list instead of a typed parameter list.
6526 /// After returning, ParamInfo will hold the parsed parameters.
6528 /// identifier-list: [C99 6.7.5]
6530 /// identifier-list ',' identifier
6532 void Parser::ParseFunctionDeclaratorIdentifierList(
6534 SmallVectorImpl<DeclaratorChunk::ParamInfo> &ParamInfo) {
6535 // If there was no identifier specified for the declarator, either we are in
6536 // an abstract-declarator, or we are in a parameter declarator which was found
6537 // to be abstract. In abstract-declarators, identifier lists are not valid:
6539 if (!D.getIdentifier())
6540 Diag(Tok, diag::ext_ident_list_in_param);
6542 // Maintain an efficient lookup of params we have seen so far.
6543 llvm::SmallSet<const IdentifierInfo*, 16> ParamsSoFar;
6546 // If this isn't an identifier, report the error and skip until ')'.
6547 if (Tok.isNot(tok::identifier)) {
6548 Diag(Tok, diag::err_expected) << tok::identifier;
6549 SkipUntil(tok::r_paren, StopAtSemi | StopBeforeMatch);
6550 // Forget we parsed anything.
6555 IdentifierInfo *ParmII = Tok.getIdentifierInfo();
6557 // Reject 'typedef int y; int test(x, y)', but continue parsing.
6558 if (Actions.getTypeName(*ParmII, Tok.getLocation(), getCurScope()))
6559 Diag(Tok, diag::err_unexpected_typedef_ident) << ParmII;
6561 // Verify that the argument identifier has not already been mentioned.
6562 if (!ParamsSoFar.insert(ParmII).second) {
6563 Diag(Tok, diag::err_param_redefinition) << ParmII;
6565 // Remember this identifier in ParamInfo.
6566 ParamInfo.push_back(DeclaratorChunk::ParamInfo(ParmII,
6571 // Eat the identifier.
6573 // The list continues if we see a comma.
6574 } while (TryConsumeToken(tok::comma));
6577 /// ParseParameterDeclarationClause - Parse a (possibly empty) parameter-list
6578 /// after the opening parenthesis. This function will not parse a K&R-style
6579 /// identifier list.
6581 /// D is the declarator being parsed. If FirstArgAttrs is non-null, then the
6582 /// caller parsed those arguments immediately after the open paren - they should
6583 /// be considered to be part of the first parameter.
6585 /// After returning, ParamInfo will hold the parsed parameters. EllipsisLoc will
6586 /// be the location of the ellipsis, if any was parsed.
6588 /// parameter-type-list: [C99 6.7.5]
6590 /// parameter-list ',' '...'
6591 /// [C++] parameter-list '...'
6593 /// parameter-list: [C99 6.7.5]
6594 /// parameter-declaration
6595 /// parameter-list ',' parameter-declaration
6597 /// parameter-declaration: [C99 6.7.5]
6598 /// declaration-specifiers declarator
6599 /// [C++] declaration-specifiers declarator '=' assignment-expression
6600 /// [C++11] initializer-clause
6601 /// [GNU] declaration-specifiers declarator attributes
6602 /// declaration-specifiers abstract-declarator[opt]
6603 /// [C++] declaration-specifiers abstract-declarator[opt]
6604 /// '=' assignment-expression
6605 /// [GNU] declaration-specifiers abstract-declarator[opt] attributes
6606 /// [C++11] attribute-specifier-seq parameter-declaration
6608 void Parser::ParseParameterDeclarationClause(
6610 ParsedAttributes &FirstArgAttrs,
6611 SmallVectorImpl<DeclaratorChunk::ParamInfo> &ParamInfo,
6612 SourceLocation &EllipsisLoc) {
6614 // Avoid exceeding the maximum function scope depth.
6615 // See https://bugs.llvm.org/show_bug.cgi?id=19607
6616 // Note Sema::ActOnParamDeclarator calls ParmVarDecl::setScopeInfo with
6617 // getFunctionPrototypeDepth() - 1.
6618 if (getCurScope()->getFunctionPrototypeDepth() - 1 >
6619 ParmVarDecl::getMaxFunctionScopeDepth()) {
6620 Diag(Tok.getLocation(), diag::err_function_scope_depth_exceeded)
6621 << ParmVarDecl::getMaxFunctionScopeDepth();
6627 // FIXME: Issue a diagnostic if we parsed an attribute-specifier-seq
6628 // before deciding this was a parameter-declaration-clause.
6629 if (TryConsumeToken(tok::ellipsis, EllipsisLoc))
6632 // Parse the declaration-specifiers.
6633 // Just use the ParsingDeclaration "scope" of the declarator.
6634 DeclSpec DS(AttrFactory);
6636 // Parse any C++11 attributes.
6637 MaybeParseCXX11Attributes(DS.getAttributes());
6639 // Skip any Microsoft attributes before a param.
6640 MaybeParseMicrosoftAttributes(DS.getAttributes());
6642 SourceLocation DSStart = Tok.getLocation();
6644 // If the caller parsed attributes for the first argument, add them now.
6645 // Take them so that we only apply the attributes to the first parameter.
6646 // FIXME: If we can leave the attributes in the token stream somehow, we can
6647 // get rid of a parameter (FirstArgAttrs) and this statement. It might be
6649 DS.takeAttributesFrom(FirstArgAttrs);
6651 ParseDeclarationSpecifiers(DS);
6654 // Parse the declarator. This is "PrototypeContext" or
6655 // "LambdaExprParameterContext", because we must accept either
6656 // 'declarator' or 'abstract-declarator' here.
6657 Declarator ParmDeclarator(
6658 DS, D.getContext() == DeclaratorContext::LambdaExprContext
6659 ? DeclaratorContext::LambdaExprParameterContext
6660 : DeclaratorContext::PrototypeContext);
6661 ParseDeclarator(ParmDeclarator);
6663 // Parse GNU attributes, if present.
6664 MaybeParseGNUAttributes(ParmDeclarator);
6666 if (Tok.is(tok::kw_requires)) {
6667 // User tried to define a requires clause in a parameter declaration,
6668 // which is surely not a function declaration.
6669 // void f(int (*g)(int, int) requires true);
6671 diag::err_requires_clause_on_declarator_not_declaring_a_function);
6673 Actions.CorrectDelayedTyposInExpr(
6674 ParseConstraintLogicalOrExpression(/*IsTrailingRequiresClause=*/true));
6677 // Remember this parsed parameter in ParamInfo.
6678 IdentifierInfo *ParmII = ParmDeclarator.getIdentifier();
6680 // DefArgToks is used when the parsing of default arguments needs
6682 std::unique_ptr<CachedTokens> DefArgToks;
6684 // If no parameter was specified, verify that *something* was specified,
6685 // otherwise we have a missing type and identifier.
6686 if (DS.isEmpty() && ParmDeclarator.getIdentifier() == nullptr &&
6687 ParmDeclarator.getNumTypeObjects() == 0) {
6688 // Completely missing, emit error.
6689 Diag(DSStart, diag::err_missing_param);
6691 // Otherwise, we have something. Add it and let semantic analysis try
6692 // to grok it and add the result to the ParamInfo we are building.
6694 // Last chance to recover from a misplaced ellipsis in an attempted
6695 // parameter pack declaration.
6696 if (Tok.is(tok::ellipsis) &&
6697 (NextToken().isNot(tok::r_paren) ||
6698 (!ParmDeclarator.getEllipsisLoc().isValid() &&
6699 !Actions.isUnexpandedParameterPackPermitted())) &&
6700 Actions.containsUnexpandedParameterPacks(ParmDeclarator))
6701 DiagnoseMisplacedEllipsisInDeclarator(ConsumeToken(), ParmDeclarator);
6703 // Inform the actions module about the parameter declarator, so it gets
6704 // added to the current scope.
6705 Decl *Param = Actions.ActOnParamDeclarator(getCurScope(), ParmDeclarator);
6706 // Parse the default argument, if any. We parse the default
6707 // arguments in all dialects; the semantic analysis in
6708 // ActOnParamDefaultArgument will reject the default argument in
6710 if (Tok.is(tok::equal)) {
6711 SourceLocation EqualLoc = Tok.getLocation();
6713 // Parse the default argument
6714 if (D.getContext() == DeclaratorContext::MemberContext) {
6715 // If we're inside a class definition, cache the tokens
6716 // corresponding to the default argument. We'll actually parse
6717 // them when we see the end of the class definition.
6718 DefArgToks.reset(new CachedTokens);
6720 SourceLocation ArgStartLoc = NextToken().getLocation();
6721 if (!ConsumeAndStoreInitializer(*DefArgToks, CIK_DefaultArgument)) {
6723 Actions.ActOnParamDefaultArgumentError(Param, EqualLoc);
6725 Actions.ActOnParamUnparsedDefaultArgument(Param, EqualLoc,
6732 // The argument isn't actually potentially evaluated unless it is
6734 EnterExpressionEvaluationContext Eval(
6736 Sema::ExpressionEvaluationContext::PotentiallyEvaluatedIfUsed,
6739 ExprResult DefArgResult;
6740 if (getLangOpts().CPlusPlus11 && Tok.is(tok::l_brace)) {
6741 Diag(Tok, diag::warn_cxx98_compat_generalized_initializer_lists);
6742 DefArgResult = ParseBraceInitializer();
6744 DefArgResult = ParseAssignmentExpression();
6745 DefArgResult = Actions.CorrectDelayedTyposInExpr(DefArgResult);
6746 if (DefArgResult.isInvalid()) {
6747 Actions.ActOnParamDefaultArgumentError(Param, EqualLoc);
6748 SkipUntil(tok::comma, tok::r_paren, StopAtSemi | StopBeforeMatch);
6750 // Inform the actions module about the default argument
6751 Actions.ActOnParamDefaultArgument(Param, EqualLoc,
6752 DefArgResult.get());
6757 ParamInfo.push_back(DeclaratorChunk::ParamInfo(ParmII,
6758 ParmDeclarator.getIdentifierLoc(),
6759 Param, std::move(DefArgToks)));
6762 if (TryConsumeToken(tok::ellipsis, EllipsisLoc)) {
6763 if (!getLangOpts().CPlusPlus) {
6764 // We have ellipsis without a preceding ',', which is ill-formed
6765 // in C. Complain and provide the fix.
6766 Diag(EllipsisLoc, diag::err_missing_comma_before_ellipsis)
6767 << FixItHint::CreateInsertion(EllipsisLoc, ", ");
6768 } else if (ParmDeclarator.getEllipsisLoc().isValid() ||
6769 Actions.containsUnexpandedParameterPacks(ParmDeclarator)) {
6770 // It looks like this was supposed to be a parameter pack. Warn and
6771 // point out where the ellipsis should have gone.
6772 SourceLocation ParmEllipsis = ParmDeclarator.getEllipsisLoc();
6773 Diag(EllipsisLoc, diag::warn_misplaced_ellipsis_vararg)
6774 << ParmEllipsis.isValid() << ParmEllipsis;
6775 if (ParmEllipsis.isValid()) {
6777 diag::note_misplaced_ellipsis_vararg_existing_ellipsis);
6779 Diag(ParmDeclarator.getIdentifierLoc(),
6780 diag::note_misplaced_ellipsis_vararg_add_ellipsis)
6781 << FixItHint::CreateInsertion(ParmDeclarator.getIdentifierLoc(),
6783 << !ParmDeclarator.hasName();
6785 Diag(EllipsisLoc, diag::note_misplaced_ellipsis_vararg_add_comma)
6786 << FixItHint::CreateInsertion(EllipsisLoc, ", ");
6789 // We can't have any more parameters after an ellipsis.
6793 // If the next token is a comma, consume it and keep reading arguments.
6794 } while (TryConsumeToken(tok::comma));
6797 /// [C90] direct-declarator '[' constant-expression[opt] ']'
6798 /// [C99] direct-declarator '[' type-qual-list[opt] assignment-expr[opt] ']'
6799 /// [C99] direct-declarator '[' 'static' type-qual-list[opt] assign-expr ']'
6800 /// [C99] direct-declarator '[' type-qual-list 'static' assignment-expr ']'
6801 /// [C99] direct-declarator '[' type-qual-list[opt] '*' ']'
6802 /// [C++11] direct-declarator '[' constant-expression[opt] ']'
6803 /// attribute-specifier-seq[opt]
6804 void Parser::ParseBracketDeclarator(Declarator &D) {
6805 if (CheckProhibitedCXX11Attribute())
6808 BalancedDelimiterTracker T(*this, tok::l_square);
6811 // C array syntax has many features, but by-far the most common is [] and [4].
6812 // This code does a fast path to handle some of the most obvious cases.
6813 if (Tok.getKind() == tok::r_square) {
6815 ParsedAttributes attrs(AttrFactory);
6816 MaybeParseCXX11Attributes(attrs);
6818 // Remember that we parsed the empty array type.
6819 D.AddTypeInfo(DeclaratorChunk::getArray(0, false, false, nullptr,
6820 T.getOpenLocation(),
6821 T.getCloseLocation()),
6822 std::move(attrs), T.getCloseLocation());
6824 } else if (Tok.getKind() == tok::numeric_constant &&
6825 GetLookAheadToken(1).is(tok::r_square)) {
6826 // [4] is very common. Parse the numeric constant expression.
6827 ExprResult ExprRes(Actions.ActOnNumericConstant(Tok, getCurScope()));
6831 ParsedAttributes attrs(AttrFactory);
6832 MaybeParseCXX11Attributes(attrs);
6834 // Remember that we parsed a array type, and remember its features.
6835 D.AddTypeInfo(DeclaratorChunk::getArray(0, false, false, ExprRes.get(),
6836 T.getOpenLocation(),
6837 T.getCloseLocation()),
6838 std::move(attrs), T.getCloseLocation());
6840 } else if (Tok.getKind() == tok::code_completion) {
6841 Actions.CodeCompleteBracketDeclarator(getCurScope());
6842 return cutOffParsing();
6845 // If valid, this location is the position where we read the 'static' keyword.
6846 SourceLocation StaticLoc;
6847 TryConsumeToken(tok::kw_static, StaticLoc);
6849 // If there is a type-qualifier-list, read it now.
6850 // Type qualifiers in an array subscript are a C99 feature.
6851 DeclSpec DS(AttrFactory);
6852 ParseTypeQualifierListOpt(DS, AR_CXX11AttributesParsed);
6854 // If we haven't already read 'static', check to see if there is one after the
6855 // type-qualifier-list.
6856 if (!StaticLoc.isValid())
6857 TryConsumeToken(tok::kw_static, StaticLoc);
6859 // Handle "direct-declarator [ type-qual-list[opt] * ]".
6860 bool isStar = false;
6861 ExprResult NumElements;
6863 // Handle the case where we have '[*]' as the array size. However, a leading
6864 // star could be the start of an expression, for example 'X[*p + 4]'. Verify
6865 // the token after the star is a ']'. Since stars in arrays are
6866 // infrequent, use of lookahead is not costly here.
6867 if (Tok.is(tok::star) && GetLookAheadToken(1).is(tok::r_square)) {
6868 ConsumeToken(); // Eat the '*'.
6870 if (StaticLoc.isValid()) {
6871 Diag(StaticLoc, diag::err_unspecified_vla_size_with_static);
6872 StaticLoc = SourceLocation(); // Drop the static.
6875 } else if (Tok.isNot(tok::r_square)) {
6876 // Note, in C89, this production uses the constant-expr production instead
6877 // of assignment-expr. The only difference is that assignment-expr allows
6878 // things like '=' and '*='. Sema rejects these in C89 mode because they
6879 // are not i-c-e's, so we don't need to distinguish between the two here.
6881 // Parse the constant-expression or assignment-expression now (depending
6883 if (getLangOpts().CPlusPlus) {
6884 NumElements = ParseConstantExpression();
6886 EnterExpressionEvaluationContext Unevaluated(
6887 Actions, Sema::ExpressionEvaluationContext::ConstantEvaluated);
6889 Actions.CorrectDelayedTyposInExpr(ParseAssignmentExpression());
6892 if (StaticLoc.isValid()) {
6893 Diag(StaticLoc, diag::err_unspecified_size_with_static);
6894 StaticLoc = SourceLocation(); // Drop the static.
6898 // If there was an error parsing the assignment-expression, recover.
6899 if (NumElements.isInvalid()) {
6900 D.setInvalidType(true);
6901 // If the expression was invalid, skip it.
6902 SkipUntil(tok::r_square, StopAtSemi);
6908 MaybeParseCXX11Attributes(DS.getAttributes());
6910 // Remember that we parsed a array type, and remember its features.
6912 DeclaratorChunk::getArray(DS.getTypeQualifiers(), StaticLoc.isValid(),
6913 isStar, NumElements.get(), T.getOpenLocation(),
6914 T.getCloseLocation()),
6915 std::move(DS.getAttributes()), T.getCloseLocation());
6918 /// Diagnose brackets before an identifier.
6919 void Parser::ParseMisplacedBracketDeclarator(Declarator &D) {
6920 assert(Tok.is(tok::l_square) && "Missing opening bracket");
6921 assert(!D.mayOmitIdentifier() && "Declarator cannot omit identifier");
6923 SourceLocation StartBracketLoc = Tok.getLocation();
6924 Declarator TempDeclarator(D.getDeclSpec(), D.getContext());
6926 while (Tok.is(tok::l_square)) {
6927 ParseBracketDeclarator(TempDeclarator);
6930 // Stuff the location of the start of the brackets into the Declarator.
6931 // The diagnostics from ParseDirectDeclarator will make more sense if
6932 // they use this location instead.
6933 if (Tok.is(tok::semi))
6934 D.getName().EndLocation = StartBracketLoc;
6936 SourceLocation SuggestParenLoc = Tok.getLocation();
6938 // Now that the brackets are removed, try parsing the declarator again.
6939 ParseDeclaratorInternal(D, &Parser::ParseDirectDeclarator);
6941 // Something went wrong parsing the brackets, in which case,
6942 // ParseBracketDeclarator has emitted an error, and we don't need to emit
6944 if (TempDeclarator.getNumTypeObjects() == 0)
6947 // Determine if parens will need to be suggested in the diagnostic.
6948 bool NeedParens = false;
6949 if (D.getNumTypeObjects() != 0) {
6950 switch (D.getTypeObject(D.getNumTypeObjects() - 1).Kind) {
6951 case DeclaratorChunk::Pointer:
6952 case DeclaratorChunk::Reference:
6953 case DeclaratorChunk::BlockPointer:
6954 case DeclaratorChunk::MemberPointer:
6955 case DeclaratorChunk::Pipe:
6958 case DeclaratorChunk::Array:
6959 case DeclaratorChunk::Function:
6960 case DeclaratorChunk::Paren:
6966 // Create a DeclaratorChunk for the inserted parens.
6967 SourceLocation EndLoc = PP.getLocForEndOfToken(D.getEndLoc());
6968 D.AddTypeInfo(DeclaratorChunk::getParen(SuggestParenLoc, EndLoc),
6972 // Adding back the bracket info to the end of the Declarator.
6973 for (unsigned i = 0, e = TempDeclarator.getNumTypeObjects(); i < e; ++i) {
6974 const DeclaratorChunk &Chunk = TempDeclarator.getTypeObject(i);
6975 D.AddTypeInfo(Chunk, SourceLocation());
6978 // The missing identifier would have been diagnosed in ParseDirectDeclarator.
6979 // If parentheses are required, always suggest them.
6980 if (!D.getIdentifier() && !NeedParens)
6983 SourceLocation EndBracketLoc = TempDeclarator.getEndLoc();
6985 // Generate the move bracket error message.
6986 SourceRange BracketRange(StartBracketLoc, EndBracketLoc);
6987 SourceLocation EndLoc = PP.getLocForEndOfToken(D.getEndLoc());
6990 Diag(EndLoc, diag::err_brackets_go_after_unqualified_id)
6991 << getLangOpts().CPlusPlus
6992 << FixItHint::CreateInsertion(SuggestParenLoc, "(")
6993 << FixItHint::CreateInsertion(EndLoc, ")")
6994 << FixItHint::CreateInsertionFromRange(
6995 EndLoc, CharSourceRange(BracketRange, true))
6996 << FixItHint::CreateRemoval(BracketRange);
6998 Diag(EndLoc, diag::err_brackets_go_after_unqualified_id)
6999 << getLangOpts().CPlusPlus
7000 << FixItHint::CreateInsertionFromRange(
7001 EndLoc, CharSourceRange(BracketRange, true))
7002 << FixItHint::CreateRemoval(BracketRange);
7006 /// [GNU] typeof-specifier:
7007 /// typeof ( expressions )
7008 /// typeof ( type-name )
7009 /// [GNU/C++] typeof unary-expression
7011 void Parser::ParseTypeofSpecifier(DeclSpec &DS) {
7012 assert(Tok.is(tok::kw_typeof) && "Not a typeof specifier");
7014 SourceLocation StartLoc = ConsumeToken();
7016 const bool hasParens = Tok.is(tok::l_paren);
7018 EnterExpressionEvaluationContext Unevaluated(
7019 Actions, Sema::ExpressionEvaluationContext::Unevaluated,
7020 Sema::ReuseLambdaContextDecl);
7024 SourceRange CastRange;
7025 ExprResult Operand = Actions.CorrectDelayedTyposInExpr(
7026 ParseExprAfterUnaryExprOrTypeTrait(OpTok, isCastExpr, CastTy, CastRange));
7028 DS.setTypeofParensRange(CastRange);
7030 if (CastRange.getEnd().isInvalid())
7031 // FIXME: Not accurate, the range gets one token more than it should.
7032 DS.SetRangeEnd(Tok.getLocation());
7034 DS.SetRangeEnd(CastRange.getEnd());
7038 DS.SetTypeSpecError();
7042 const char *PrevSpec = nullptr;
7044 // Check for duplicate type specifiers (e.g. "int typeof(int)").
7045 if (DS.SetTypeSpecType(DeclSpec::TST_typeofType, StartLoc, PrevSpec,
7047 Actions.getASTContext().getPrintingPolicy()))
7048 Diag(StartLoc, DiagID) << PrevSpec;
7052 // If we get here, the operand to the typeof was an expression.
7053 if (Operand.isInvalid()) {
7054 DS.SetTypeSpecError();
7058 // We might need to transform the operand if it is potentially evaluated.
7059 Operand = Actions.HandleExprEvaluationContextForTypeof(Operand.get());
7060 if (Operand.isInvalid()) {
7061 DS.SetTypeSpecError();
7065 const char *PrevSpec = nullptr;
7067 // Check for duplicate type specifiers (e.g. "int typeof(int)").
7068 if (DS.SetTypeSpecType(DeclSpec::TST_typeofExpr, StartLoc, PrevSpec,
7069 DiagID, Operand.get(),
7070 Actions.getASTContext().getPrintingPolicy()))
7071 Diag(StartLoc, DiagID) << PrevSpec;
7074 /// [C11] atomic-specifier:
7075 /// _Atomic ( type-name )
7077 void Parser::ParseAtomicSpecifier(DeclSpec &DS) {
7078 assert(Tok.is(tok::kw__Atomic) && NextToken().is(tok::l_paren) &&
7079 "Not an atomic specifier");
7081 SourceLocation StartLoc = ConsumeToken();
7082 BalancedDelimiterTracker T(*this, tok::l_paren);
7083 if (T.consumeOpen())
7086 TypeResult Result = ParseTypeName();
7087 if (Result.isInvalid()) {
7088 SkipUntil(tok::r_paren, StopAtSemi);
7095 if (T.getCloseLocation().isInvalid())
7098 DS.setTypeofParensRange(T.getRange());
7099 DS.SetRangeEnd(T.getCloseLocation());
7101 const char *PrevSpec = nullptr;
7103 if (DS.SetTypeSpecType(DeclSpec::TST_atomic, StartLoc, PrevSpec,
7104 DiagID, Result.get(),
7105 Actions.getASTContext().getPrintingPolicy()))
7106 Diag(StartLoc, DiagID) << PrevSpec;
7109 /// TryAltiVecVectorTokenOutOfLine - Out of line body that should only be called
7110 /// from TryAltiVecVectorToken.
7111 bool Parser::TryAltiVecVectorTokenOutOfLine() {
7112 Token Next = NextToken();
7113 switch (Next.getKind()) {
7114 default: return false;
7117 case tok::kw_signed:
7118 case tok::kw_unsigned:
7123 case tok::kw_double:
7125 case tok::kw___bool:
7126 case tok::kw___pixel:
7127 Tok.setKind(tok::kw___vector);
7129 case tok::identifier:
7130 if (Next.getIdentifierInfo() == Ident_pixel) {
7131 Tok.setKind(tok::kw___vector);
7134 if (Next.getIdentifierInfo() == Ident_bool) {
7135 Tok.setKind(tok::kw___vector);
7142 bool Parser::TryAltiVecTokenOutOfLine(DeclSpec &DS, SourceLocation Loc,
7143 const char *&PrevSpec, unsigned &DiagID,
7145 const PrintingPolicy &Policy = Actions.getASTContext().getPrintingPolicy();
7146 if (Tok.getIdentifierInfo() == Ident_vector) {
7147 Token Next = NextToken();
7148 switch (Next.getKind()) {
7151 case tok::kw_signed:
7152 case tok::kw_unsigned:
7157 case tok::kw_double:
7159 case tok::kw___bool:
7160 case tok::kw___pixel:
7161 isInvalid = DS.SetTypeAltiVecVector(true, Loc, PrevSpec, DiagID, Policy);
7163 case tok::identifier:
7164 if (Next.getIdentifierInfo() == Ident_pixel) {
7165 isInvalid = DS.SetTypeAltiVecVector(true, Loc, PrevSpec, DiagID,Policy);
7168 if (Next.getIdentifierInfo() == Ident_bool) {
7169 isInvalid = DS.SetTypeAltiVecVector(true, Loc, PrevSpec, DiagID,Policy);
7176 } else if ((Tok.getIdentifierInfo() == Ident_pixel) &&
7177 DS.isTypeAltiVecVector()) {
7178 isInvalid = DS.SetTypeAltiVecPixel(true, Loc, PrevSpec, DiagID, Policy);
7180 } else if ((Tok.getIdentifierInfo() == Ident_bool) &&
7181 DS.isTypeAltiVecVector()) {
7182 isInvalid = DS.SetTypeAltiVecBool(true, Loc, PrevSpec, DiagID, Policy);