1 //===--- ParseDecl.cpp - Declaration Parsing --------------------*- C++ -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file implements the Declaration portions of the Parser interfaces.
12 //===----------------------------------------------------------------------===//
14 #include "clang/Parse/Parser.h"
15 #include "clang/Parse/RAIIObjectsForParser.h"
16 #include "clang/AST/ASTContext.h"
17 #include "clang/AST/DeclTemplate.h"
18 #include "clang/Basic/AddressSpaces.h"
19 #include "clang/Basic/Attributes.h"
20 #include "clang/Basic/CharInfo.h"
21 #include "clang/Basic/TargetInfo.h"
22 #include "clang/Parse/ParseDiagnostic.h"
23 #include "clang/Sema/Lookup.h"
24 #include "clang/Sema/ParsedTemplate.h"
25 #include "clang/Sema/PrettyDeclStackTrace.h"
26 #include "clang/Sema/Scope.h"
27 #include "clang/Sema/SemaDiagnostic.h"
28 #include "llvm/ADT/Optional.h"
29 #include "llvm/ADT/SmallSet.h"
30 #include "llvm/ADT/SmallString.h"
31 #include "llvm/ADT/StringSwitch.h"
32 #include "llvm/Support/ScopedPrinter.h"
34 using namespace clang;
36 //===----------------------------------------------------------------------===//
37 // C99 6.7: Declarations.
38 //===----------------------------------------------------------------------===//
41 /// type-name: [C99 6.7.6]
42 /// specifier-qualifier-list abstract-declarator[opt]
44 /// Called type-id in C++.
45 TypeResult Parser::ParseTypeName(SourceRange *Range,
46 Declarator::TheContext Context,
49 ParsedAttributes *Attrs) {
50 DeclSpecContext DSC = getDeclSpecContextFromDeclaratorContext(Context);
51 if (DSC == DSC_normal)
52 DSC = DSC_type_specifier;
54 // Parse the common declaration-specifiers piece.
55 DeclSpec DS(AttrFactory);
57 DS.addAttributes(Attrs->getList());
58 ParseSpecifierQualifierList(DS, AS, DSC);
60 *OwnedType = DS.isTypeSpecOwned() ? DS.getRepAsDecl() : nullptr;
62 // Parse the abstract-declarator, if present.
63 Declarator DeclaratorInfo(DS, Context);
64 ParseDeclarator(DeclaratorInfo);
66 *Range = DeclaratorInfo.getSourceRange();
68 if (DeclaratorInfo.isInvalidType())
71 return Actions.ActOnTypeName(getCurScope(), DeclaratorInfo);
74 /// \brief Normalizes an attribute name by dropping prefixed and suffixed __.
75 static StringRef normalizeAttrName(StringRef Name) {
76 if (Name.size() >= 4 && Name.startswith("__") && Name.endswith("__"))
77 return Name.drop_front(2).drop_back(2);
81 /// isAttributeLateParsed - Return true if the attribute has arguments that
82 /// require late parsing.
83 static bool isAttributeLateParsed(const IdentifierInfo &II) {
84 #define CLANG_ATTR_LATE_PARSED_LIST
85 return llvm::StringSwitch<bool>(normalizeAttrName(II.getName()))
86 #include "clang/Parse/AttrParserStringSwitches.inc"
88 #undef CLANG_ATTR_LATE_PARSED_LIST
91 /// ParseGNUAttributes - Parse a non-empty attributes list.
95 /// attributes attribute
98 /// '__attribute__' '(' '(' attribute-list ')' ')'
100 /// [GNU] attribute-list:
102 /// attribute_list ',' attrib
107 /// attrib-name '(' identifier ')'
108 /// attrib-name '(' identifier ',' nonempty-expr-list ')'
109 /// attrib-name '(' argument-expression-list [C99 6.5.2] ')'
111 /// [GNU] attrib-name:
117 /// Whether an attribute takes an 'identifier' is determined by the
118 /// attrib-name. GCC's behavior here is not worth imitating:
120 /// * In C mode, if the attribute argument list starts with an identifier
121 /// followed by a ',' or an ')', and the identifier doesn't resolve to
122 /// a type, it is parsed as an identifier. If the attribute actually
123 /// wanted an expression, it's out of luck (but it turns out that no
124 /// attributes work that way, because C constant expressions are very
126 /// * In C++ mode, if the attribute argument list starts with an identifier,
127 /// and the attribute *wants* an identifier, it is parsed as an identifier.
128 /// At block scope, any additional tokens between the identifier and the
129 /// ',' or ')' are ignored, otherwise they produce a parse error.
131 /// We follow the C++ model, but don't allow junk after the identifier.
132 void Parser::ParseGNUAttributes(ParsedAttributes &attrs,
133 SourceLocation *endLoc,
134 LateParsedAttrList *LateAttrs,
136 assert(Tok.is(tok::kw___attribute) && "Not a GNU attribute list!");
138 while (Tok.is(tok::kw___attribute)) {
140 if (ExpectAndConsume(tok::l_paren, diag::err_expected_lparen_after,
142 SkipUntil(tok::r_paren, StopAtSemi); // skip until ) or ;
145 if (ExpectAndConsume(tok::l_paren, diag::err_expected_lparen_after, "(")) {
146 SkipUntil(tok::r_paren, StopAtSemi); // skip until ) or ;
149 // Parse the attribute-list. e.g. __attribute__(( weak, alias("__f") ))
151 // Allow empty/non-empty attributes. ((__vector_size__(16),,,,))
152 if (TryConsumeToken(tok::comma))
155 // Expect an identifier or declaration specifier (const, int, etc.)
156 if (Tok.isAnnotation())
158 IdentifierInfo *AttrName = Tok.getIdentifierInfo();
162 SourceLocation AttrNameLoc = ConsumeToken();
164 if (Tok.isNot(tok::l_paren)) {
165 attrs.addNew(AttrName, AttrNameLoc, nullptr, AttrNameLoc, nullptr, 0,
166 AttributeList::AS_GNU);
170 // Handle "parameterized" attributes
171 if (!LateAttrs || !isAttributeLateParsed(*AttrName)) {
172 ParseGNUAttributeArgs(AttrName, AttrNameLoc, attrs, endLoc, nullptr,
173 SourceLocation(), AttributeList::AS_GNU, D);
177 // Handle attributes with arguments that require late parsing.
178 LateParsedAttribute *LA =
179 new LateParsedAttribute(this, *AttrName, AttrNameLoc);
180 LateAttrs->push_back(LA);
182 // Attributes in a class are parsed at the end of the class, along
183 // with other late-parsed declarations.
184 if (!ClassStack.empty() && !LateAttrs->parseSoon())
185 getCurrentClass().LateParsedDeclarations.push_back(LA);
187 // Be sure ConsumeAndStoreUntil doesn't see the start l_paren, since it
188 // recursively consumes balanced parens.
189 LA->Toks.push_back(Tok);
191 // Consume everything up to and including the matching right parens.
192 ConsumeAndStoreUntil(tok::r_paren, LA->Toks, /*StopAtSemi=*/true);
196 Eof.setLocation(Tok.getLocation());
197 LA->Toks.push_back(Eof);
200 if (ExpectAndConsume(tok::r_paren))
201 SkipUntil(tok::r_paren, StopAtSemi);
202 SourceLocation Loc = Tok.getLocation();
203 if (ExpectAndConsume(tok::r_paren))
204 SkipUntil(tok::r_paren, StopAtSemi);
210 /// \brief Determine whether the given attribute has an identifier argument.
211 static bool attributeHasIdentifierArg(const IdentifierInfo &II) {
212 #define CLANG_ATTR_IDENTIFIER_ARG_LIST
213 return llvm::StringSwitch<bool>(normalizeAttrName(II.getName()))
214 #include "clang/Parse/AttrParserStringSwitches.inc"
216 #undef CLANG_ATTR_IDENTIFIER_ARG_LIST
219 /// \brief Determine whether the given attribute parses a type argument.
220 static bool attributeIsTypeArgAttr(const IdentifierInfo &II) {
221 #define CLANG_ATTR_TYPE_ARG_LIST
222 return llvm::StringSwitch<bool>(normalizeAttrName(II.getName()))
223 #include "clang/Parse/AttrParserStringSwitches.inc"
225 #undef CLANG_ATTR_TYPE_ARG_LIST
228 /// \brief Determine whether the given attribute requires parsing its arguments
229 /// in an unevaluated context or not.
230 static bool attributeParsedArgsUnevaluated(const IdentifierInfo &II) {
231 #define CLANG_ATTR_ARG_CONTEXT_LIST
232 return llvm::StringSwitch<bool>(normalizeAttrName(II.getName()))
233 #include "clang/Parse/AttrParserStringSwitches.inc"
235 #undef CLANG_ATTR_ARG_CONTEXT_LIST
238 IdentifierLoc *Parser::ParseIdentifierLoc() {
239 assert(Tok.is(tok::identifier) && "expected an identifier");
240 IdentifierLoc *IL = IdentifierLoc::create(Actions.Context,
242 Tok.getIdentifierInfo());
247 void Parser::ParseAttributeWithTypeArg(IdentifierInfo &AttrName,
248 SourceLocation AttrNameLoc,
249 ParsedAttributes &Attrs,
250 SourceLocation *EndLoc,
251 IdentifierInfo *ScopeName,
252 SourceLocation ScopeLoc,
253 AttributeList::Syntax Syntax) {
254 BalancedDelimiterTracker Parens(*this, tok::l_paren);
255 Parens.consumeOpen();
258 if (Tok.isNot(tok::r_paren))
261 if (Parens.consumeClose())
268 Attrs.addNewTypeAttr(&AttrName,
269 SourceRange(AttrNameLoc, Parens.getCloseLocation()),
270 ScopeName, ScopeLoc, T.get(), Syntax);
272 Attrs.addNew(&AttrName, SourceRange(AttrNameLoc, Parens.getCloseLocation()),
273 ScopeName, ScopeLoc, nullptr, 0, Syntax);
276 unsigned Parser::ParseAttributeArgsCommon(
277 IdentifierInfo *AttrName, SourceLocation AttrNameLoc,
278 ParsedAttributes &Attrs, SourceLocation *EndLoc, IdentifierInfo *ScopeName,
279 SourceLocation ScopeLoc, AttributeList::Syntax Syntax) {
280 // Ignore the left paren location for now.
284 if (Tok.is(tok::identifier)) {
285 // If this attribute wants an 'identifier' argument, make it so.
286 bool IsIdentifierArg = attributeHasIdentifierArg(*AttrName);
287 AttributeList::Kind AttrKind =
288 AttributeList::getKind(AttrName, ScopeName, Syntax);
290 // If we don't know how to parse this attribute, but this is the only
291 // token in this argument, assume it's meant to be an identifier.
292 if (AttrKind == AttributeList::UnknownAttribute ||
293 AttrKind == AttributeList::IgnoredAttribute) {
294 const Token &Next = NextToken();
295 IsIdentifierArg = Next.isOneOf(tok::r_paren, tok::comma);
299 ArgExprs.push_back(ParseIdentifierLoc());
302 if (!ArgExprs.empty() ? Tok.is(tok::comma) : Tok.isNot(tok::r_paren)) {
304 if (!ArgExprs.empty())
307 // Parse the non-empty comma-separated list of expressions.
309 bool Uneval = attributeParsedArgsUnevaluated(*AttrName);
310 EnterExpressionEvaluationContext Unevaluated(
312 Uneval ? Sema::ExpressionEvaluationContext::Unevaluated
313 : Sema::ExpressionEvaluationContext::ConstantEvaluated,
314 /*LambdaContextDecl=*/nullptr,
315 /*IsDecltype=*/false);
318 Actions.CorrectDelayedTyposInExpr(ParseAssignmentExpression()));
319 if (ArgExpr.isInvalid()) {
320 SkipUntil(tok::r_paren, StopAtSemi);
323 ArgExprs.push_back(ArgExpr.get());
324 // Eat the comma, move to the next argument
325 } while (TryConsumeToken(tok::comma));
328 SourceLocation RParen = Tok.getLocation();
329 if (!ExpectAndConsume(tok::r_paren)) {
330 SourceLocation AttrLoc = ScopeLoc.isValid() ? ScopeLoc : AttrNameLoc;
331 Attrs.addNew(AttrName, SourceRange(AttrLoc, RParen), ScopeName, ScopeLoc,
332 ArgExprs.data(), ArgExprs.size(), Syntax);
338 return static_cast<unsigned>(ArgExprs.size());
341 /// Parse the arguments to a parameterized GNU attribute or
342 /// a C++11 attribute in "gnu" namespace.
343 void Parser::ParseGNUAttributeArgs(IdentifierInfo *AttrName,
344 SourceLocation AttrNameLoc,
345 ParsedAttributes &Attrs,
346 SourceLocation *EndLoc,
347 IdentifierInfo *ScopeName,
348 SourceLocation ScopeLoc,
349 AttributeList::Syntax Syntax,
352 assert(Tok.is(tok::l_paren) && "Attribute arg list not starting with '('");
354 AttributeList::Kind AttrKind =
355 AttributeList::getKind(AttrName, ScopeName, Syntax);
357 if (AttrKind == AttributeList::AT_Availability) {
358 ParseAvailabilityAttribute(*AttrName, AttrNameLoc, Attrs, EndLoc, ScopeName,
361 } else if (AttrKind == AttributeList::AT_ExternalSourceSymbol) {
362 ParseExternalSourceSymbolAttribute(*AttrName, AttrNameLoc, Attrs, EndLoc,
363 ScopeName, ScopeLoc, Syntax);
365 } else if (AttrKind == AttributeList::AT_ObjCBridgeRelated) {
366 ParseObjCBridgeRelatedAttribute(*AttrName, AttrNameLoc, Attrs, EndLoc,
367 ScopeName, ScopeLoc, Syntax);
369 } else if (AttrKind == AttributeList::AT_TypeTagForDatatype) {
370 ParseTypeTagForDatatypeAttribute(*AttrName, AttrNameLoc, Attrs, EndLoc,
371 ScopeName, ScopeLoc, Syntax);
373 } else if (attributeIsTypeArgAttr(*AttrName)) {
374 ParseAttributeWithTypeArg(*AttrName, AttrNameLoc, Attrs, EndLoc, ScopeName,
379 // These may refer to the function arguments, but need to be parsed early to
380 // participate in determining whether it's a redeclaration.
381 llvm::Optional<ParseScope> PrototypeScope;
382 if (normalizeAttrName(AttrName->getName()) == "enable_if" &&
383 D && D->isFunctionDeclarator()) {
384 DeclaratorChunk::FunctionTypeInfo FTI = D->getFunctionTypeInfo();
385 PrototypeScope.emplace(this, Scope::FunctionPrototypeScope |
386 Scope::FunctionDeclarationScope |
388 for (unsigned i = 0; i != FTI.NumParams; ++i) {
389 ParmVarDecl *Param = cast<ParmVarDecl>(FTI.Params[i].Param);
390 Actions.ActOnReenterCXXMethodParameter(getCurScope(), Param);
394 ParseAttributeArgsCommon(AttrName, AttrNameLoc, Attrs, EndLoc, ScopeName,
398 unsigned Parser::ParseClangAttributeArgs(
399 IdentifierInfo *AttrName, SourceLocation AttrNameLoc,
400 ParsedAttributes &Attrs, SourceLocation *EndLoc, IdentifierInfo *ScopeName,
401 SourceLocation ScopeLoc, AttributeList::Syntax Syntax) {
402 assert(Tok.is(tok::l_paren) && "Attribute arg list not starting with '('");
404 AttributeList::Kind AttrKind =
405 AttributeList::getKind(AttrName, ScopeName, Syntax);
407 if (AttrKind == AttributeList::AT_ExternalSourceSymbol) {
408 ParseExternalSourceSymbolAttribute(*AttrName, AttrNameLoc, Attrs, EndLoc,
409 ScopeName, ScopeLoc, Syntax);
410 return Attrs.getList() ? Attrs.getList()->getNumArgs() : 0;
413 return ParseAttributeArgsCommon(AttrName, AttrNameLoc, Attrs, EndLoc,
414 ScopeName, ScopeLoc, Syntax);
417 bool Parser::ParseMicrosoftDeclSpecArgs(IdentifierInfo *AttrName,
418 SourceLocation AttrNameLoc,
419 ParsedAttributes &Attrs) {
420 // If the attribute isn't known, we will not attempt to parse any
422 if (!hasAttribute(AttrSyntax::Declspec, nullptr, AttrName,
423 getTargetInfo(), getLangOpts())) {
424 // Eat the left paren, then skip to the ending right paren.
426 SkipUntil(tok::r_paren);
430 SourceLocation OpenParenLoc = Tok.getLocation();
432 if (AttrName->getName() == "property") {
433 // The property declspec is more complex in that it can take one or two
434 // assignment expressions as a parameter, but the lhs of the assignment
435 // must be named get or put.
437 BalancedDelimiterTracker T(*this, tok::l_paren);
438 T.expectAndConsume(diag::err_expected_lparen_after,
439 AttrName->getNameStart(), tok::r_paren);
444 AK_Get = 1 // indices into AccessorNames
446 IdentifierInfo *AccessorNames[] = {nullptr, nullptr};
447 bool HasInvalidAccessor = false;
449 // Parse the accessor specifications.
451 // Stop if this doesn't look like an accessor spec.
452 if (!Tok.is(tok::identifier)) {
453 // If the user wrote a completely empty list, use a special diagnostic.
454 if (Tok.is(tok::r_paren) && !HasInvalidAccessor &&
455 AccessorNames[AK_Put] == nullptr &&
456 AccessorNames[AK_Get] == nullptr) {
457 Diag(AttrNameLoc, diag::err_ms_property_no_getter_or_putter);
461 Diag(Tok.getLocation(), diag::err_ms_property_unknown_accessor);
466 SourceLocation KindLoc = Tok.getLocation();
467 StringRef KindStr = Tok.getIdentifierInfo()->getName();
468 if (KindStr == "get") {
470 } else if (KindStr == "put") {
473 // Recover from the common mistake of using 'set' instead of 'put'.
474 } else if (KindStr == "set") {
475 Diag(KindLoc, diag::err_ms_property_has_set_accessor)
476 << FixItHint::CreateReplacement(KindLoc, "put");
479 // Handle the mistake of forgetting the accessor kind by skipping
481 } else if (NextToken().is(tok::comma) || NextToken().is(tok::r_paren)) {
482 Diag(KindLoc, diag::err_ms_property_missing_accessor_kind);
484 HasInvalidAccessor = true;
485 goto next_property_accessor;
487 // Otherwise, complain about the unknown accessor kind.
489 Diag(KindLoc, diag::err_ms_property_unknown_accessor);
490 HasInvalidAccessor = true;
493 // Try to keep parsing unless it doesn't look like an accessor spec.
494 if (!NextToken().is(tok::equal))
498 // Consume the identifier.
502 if (!TryConsumeToken(tok::equal)) {
503 Diag(Tok.getLocation(), diag::err_ms_property_expected_equal)
508 // Expect the method name.
509 if (!Tok.is(tok::identifier)) {
510 Diag(Tok.getLocation(), diag::err_ms_property_expected_accessor_name);
514 if (Kind == AK_Invalid) {
515 // Just drop invalid accessors.
516 } else if (AccessorNames[Kind] != nullptr) {
517 // Complain about the repeated accessor, ignore it, and keep parsing.
518 Diag(KindLoc, diag::err_ms_property_duplicate_accessor) << KindStr;
520 AccessorNames[Kind] = Tok.getIdentifierInfo();
524 next_property_accessor:
525 // Keep processing accessors until we run out.
526 if (TryConsumeToken(tok::comma))
529 // If we run into the ')', stop without consuming it.
530 if (Tok.is(tok::r_paren))
533 Diag(Tok.getLocation(), diag::err_ms_property_expected_comma_or_rparen);
537 // Only add the property attribute if it was well-formed.
538 if (!HasInvalidAccessor)
539 Attrs.addNewPropertyAttr(AttrName, AttrNameLoc, nullptr, SourceLocation(),
540 AccessorNames[AK_Get], AccessorNames[AK_Put],
541 AttributeList::AS_Declspec);
543 return !HasInvalidAccessor;
547 ParseAttributeArgsCommon(AttrName, AttrNameLoc, Attrs, nullptr, nullptr,
548 SourceLocation(), AttributeList::AS_Declspec);
550 // If this attribute's args were parsed, and it was expected to have
551 // arguments but none were provided, emit a diagnostic.
552 const AttributeList *Attr = Attrs.getList();
553 if (Attr && Attr->getMaxArgs() && !NumArgs) {
554 Diag(OpenParenLoc, diag::err_attribute_requires_arguments) << AttrName;
560 /// [MS] decl-specifier:
561 /// __declspec ( extended-decl-modifier-seq )
563 /// [MS] extended-decl-modifier-seq:
564 /// extended-decl-modifier[opt]
565 /// extended-decl-modifier extended-decl-modifier-seq
566 void Parser::ParseMicrosoftDeclSpecs(ParsedAttributes &Attrs,
567 SourceLocation *End) {
568 assert(getLangOpts().DeclSpecKeyword && "__declspec keyword is not enabled");
569 assert(Tok.is(tok::kw___declspec) && "Not a declspec!");
571 while (Tok.is(tok::kw___declspec)) {
573 BalancedDelimiterTracker T(*this, tok::l_paren);
574 if (T.expectAndConsume(diag::err_expected_lparen_after, "__declspec",
578 // An empty declspec is perfectly legal and should not warn. Additionally,
579 // you can specify multiple attributes per declspec.
580 while (Tok.isNot(tok::r_paren)) {
581 // Attribute not present.
582 if (TryConsumeToken(tok::comma))
585 // We expect either a well-known identifier or a generic string. Anything
586 // else is a malformed declspec.
587 bool IsString = Tok.getKind() == tok::string_literal;
588 if (!IsString && Tok.getKind() != tok::identifier &&
589 Tok.getKind() != tok::kw_restrict) {
590 Diag(Tok, diag::err_ms_declspec_type);
595 IdentifierInfo *AttrName;
596 SourceLocation AttrNameLoc;
598 SmallString<8> StrBuffer;
599 bool Invalid = false;
600 StringRef Str = PP.getSpelling(Tok, StrBuffer, &Invalid);
605 AttrName = PP.getIdentifierInfo(Str);
606 AttrNameLoc = ConsumeStringToken();
608 AttrName = Tok.getIdentifierInfo();
609 AttrNameLoc = ConsumeToken();
612 bool AttrHandled = false;
614 // Parse attribute arguments.
615 if (Tok.is(tok::l_paren))
616 AttrHandled = ParseMicrosoftDeclSpecArgs(AttrName, AttrNameLoc, Attrs);
617 else if (AttrName->getName() == "property")
618 // The property attribute must have an argument list.
619 Diag(Tok.getLocation(), diag::err_expected_lparen_after)
620 << AttrName->getName();
623 Attrs.addNew(AttrName, AttrNameLoc, nullptr, AttrNameLoc, nullptr, 0,
624 AttributeList::AS_Declspec);
628 *End = T.getCloseLocation();
632 void Parser::ParseMicrosoftTypeAttributes(ParsedAttributes &attrs) {
633 // Treat these like attributes
635 switch (Tok.getKind()) {
636 case tok::kw___fastcall:
637 case tok::kw___stdcall:
638 case tok::kw___thiscall:
639 case tok::kw___regcall:
640 case tok::kw___cdecl:
641 case tok::kw___vectorcall:
642 case tok::kw___ptr64:
644 case tok::kw___ptr32:
646 case tok::kw___uptr: {
647 IdentifierInfo *AttrName = Tok.getIdentifierInfo();
648 SourceLocation AttrNameLoc = ConsumeToken();
649 attrs.addNew(AttrName, AttrNameLoc, nullptr, AttrNameLoc, nullptr, 0,
650 AttributeList::AS_Keyword);
659 void Parser::DiagnoseAndSkipExtendedMicrosoftTypeAttributes() {
660 SourceLocation StartLoc = Tok.getLocation();
661 SourceLocation EndLoc = SkipExtendedMicrosoftTypeAttributes();
663 if (EndLoc.isValid()) {
664 SourceRange Range(StartLoc, EndLoc);
665 Diag(StartLoc, diag::warn_microsoft_qualifiers_ignored) << Range;
669 SourceLocation Parser::SkipExtendedMicrosoftTypeAttributes() {
670 SourceLocation EndLoc;
673 switch (Tok.getKind()) {
675 case tok::kw_volatile:
676 case tok::kw___fastcall:
677 case tok::kw___stdcall:
678 case tok::kw___thiscall:
679 case tok::kw___cdecl:
680 case tok::kw___vectorcall:
681 case tok::kw___ptr32:
682 case tok::kw___ptr64:
684 case tok::kw___unaligned:
687 EndLoc = ConsumeToken();
695 void Parser::ParseBorlandTypeAttributes(ParsedAttributes &attrs) {
696 // Treat these like attributes
697 while (Tok.is(tok::kw___pascal)) {
698 IdentifierInfo *AttrName = Tok.getIdentifierInfo();
699 SourceLocation AttrNameLoc = ConsumeToken();
700 attrs.addNew(AttrName, AttrNameLoc, nullptr, AttrNameLoc, nullptr, 0,
701 AttributeList::AS_Keyword);
705 void Parser::ParseOpenCLKernelAttributes(ParsedAttributes &attrs) {
706 // Treat these like attributes
707 while (Tok.is(tok::kw___kernel)) {
708 IdentifierInfo *AttrName = Tok.getIdentifierInfo();
709 SourceLocation AttrNameLoc = ConsumeToken();
710 attrs.addNew(AttrName, AttrNameLoc, nullptr, AttrNameLoc, nullptr, 0,
711 AttributeList::AS_Keyword);
715 void Parser::ParseOpenCLQualifiers(ParsedAttributes &Attrs) {
716 IdentifierInfo *AttrName = Tok.getIdentifierInfo();
717 SourceLocation AttrNameLoc = Tok.getLocation();
718 Attrs.addNew(AttrName, AttrNameLoc, nullptr, AttrNameLoc, nullptr, 0,
719 AttributeList::AS_Keyword);
722 void Parser::ParseNullabilityTypeSpecifiers(ParsedAttributes &attrs) {
723 // Treat these like attributes, even though they're type specifiers.
725 switch (Tok.getKind()) {
726 case tok::kw__Nonnull:
727 case tok::kw__Nullable:
728 case tok::kw__Null_unspecified: {
729 IdentifierInfo *AttrName = Tok.getIdentifierInfo();
730 SourceLocation AttrNameLoc = ConsumeToken();
731 if (!getLangOpts().ObjC1)
732 Diag(AttrNameLoc, diag::ext_nullability)
734 attrs.addNew(AttrName, AttrNameLoc, nullptr, AttrNameLoc, nullptr, 0,
735 AttributeList::AS_Keyword);
744 static bool VersionNumberSeparator(const char Separator) {
745 return (Separator == '.' || Separator == '_');
748 /// \brief Parse a version number.
752 /// simple-integer ',' simple-integer
753 /// simple-integer ',' simple-integer ',' simple-integer
754 VersionTuple Parser::ParseVersionTuple(SourceRange &Range) {
755 Range = SourceRange(Tok.getLocation(), Tok.getEndLoc());
757 if (!Tok.is(tok::numeric_constant)) {
758 Diag(Tok, diag::err_expected_version);
759 SkipUntil(tok::comma, tok::r_paren,
760 StopAtSemi | StopBeforeMatch | StopAtCodeCompletion);
761 return VersionTuple();
764 // Parse the major (and possibly minor and subminor) versions, which
765 // are stored in the numeric constant. We utilize a quirk of the
766 // lexer, which is that it handles something like 1.2.3 as a single
767 // numeric constant, rather than two separate tokens.
768 SmallString<512> Buffer;
769 Buffer.resize(Tok.getLength()+1);
770 const char *ThisTokBegin = &Buffer[0];
772 // Get the spelling of the token, which eliminates trigraphs, etc.
773 bool Invalid = false;
774 unsigned ActualLength = PP.getSpelling(Tok, ThisTokBegin, &Invalid);
776 return VersionTuple();
778 // Parse the major version.
779 unsigned AfterMajor = 0;
781 while (AfterMajor < ActualLength && isDigit(ThisTokBegin[AfterMajor])) {
782 Major = Major * 10 + ThisTokBegin[AfterMajor] - '0';
786 if (AfterMajor == 0) {
787 Diag(Tok, diag::err_expected_version);
788 SkipUntil(tok::comma, tok::r_paren,
789 StopAtSemi | StopBeforeMatch | StopAtCodeCompletion);
790 return VersionTuple();
793 if (AfterMajor == ActualLength) {
796 // We only had a single version component.
798 Diag(Tok, diag::err_zero_version);
799 return VersionTuple();
802 return VersionTuple(Major);
805 const char AfterMajorSeparator = ThisTokBegin[AfterMajor];
806 if (!VersionNumberSeparator(AfterMajorSeparator)
807 || (AfterMajor + 1 == ActualLength)) {
808 Diag(Tok, diag::err_expected_version);
809 SkipUntil(tok::comma, tok::r_paren,
810 StopAtSemi | StopBeforeMatch | StopAtCodeCompletion);
811 return VersionTuple();
814 // Parse the minor version.
815 unsigned AfterMinor = AfterMajor + 1;
817 while (AfterMinor < ActualLength && isDigit(ThisTokBegin[AfterMinor])) {
818 Minor = Minor * 10 + ThisTokBegin[AfterMinor] - '0';
822 if (AfterMinor == ActualLength) {
825 // We had major.minor.
826 if (Major == 0 && Minor == 0) {
827 Diag(Tok, diag::err_zero_version);
828 return VersionTuple();
831 return VersionTuple(Major, Minor, (AfterMajorSeparator == '_'));
834 const char AfterMinorSeparator = ThisTokBegin[AfterMinor];
835 // If what follows is not a '.' or '_', we have a problem.
836 if (!VersionNumberSeparator(AfterMinorSeparator)) {
837 Diag(Tok, diag::err_expected_version);
838 SkipUntil(tok::comma, tok::r_paren,
839 StopAtSemi | StopBeforeMatch | StopAtCodeCompletion);
840 return VersionTuple();
843 // Warn if separators, be it '.' or '_', do not match.
844 if (AfterMajorSeparator != AfterMinorSeparator)
845 Diag(Tok, diag::warn_expected_consistent_version_separator);
847 // Parse the subminor version.
848 unsigned AfterSubminor = AfterMinor + 1;
849 unsigned Subminor = 0;
850 while (AfterSubminor < ActualLength && isDigit(ThisTokBegin[AfterSubminor])) {
851 Subminor = Subminor * 10 + ThisTokBegin[AfterSubminor] - '0';
855 if (AfterSubminor != ActualLength) {
856 Diag(Tok, diag::err_expected_version);
857 SkipUntil(tok::comma, tok::r_paren,
858 StopAtSemi | StopBeforeMatch | StopAtCodeCompletion);
859 return VersionTuple();
862 return VersionTuple(Major, Minor, Subminor, (AfterMajorSeparator == '_'));
865 /// \brief Parse the contents of the "availability" attribute.
867 /// availability-attribute:
868 /// 'availability' '(' platform ',' opt-strict version-arg-list,
869 /// opt-replacement, opt-message')'
877 /// version-arg-list:
879 /// version-arg ',' version-arg-list
882 /// 'introduced' '=' version
883 /// 'deprecated' '=' version
884 /// 'obsoleted' = version
887 /// 'replacement' '=' <string>
889 /// 'message' '=' <string>
890 void Parser::ParseAvailabilityAttribute(IdentifierInfo &Availability,
891 SourceLocation AvailabilityLoc,
892 ParsedAttributes &attrs,
893 SourceLocation *endLoc,
894 IdentifierInfo *ScopeName,
895 SourceLocation ScopeLoc,
896 AttributeList::Syntax Syntax) {
897 enum { Introduced, Deprecated, Obsoleted, Unknown };
898 AvailabilityChange Changes[Unknown];
899 ExprResult MessageExpr, ReplacementExpr;
902 BalancedDelimiterTracker T(*this, tok::l_paren);
903 if (T.consumeOpen()) {
904 Diag(Tok, diag::err_expected) << tok::l_paren;
908 // Parse the platform name.
909 if (Tok.isNot(tok::identifier)) {
910 Diag(Tok, diag::err_availability_expected_platform);
911 SkipUntil(tok::r_paren, StopAtSemi);
914 IdentifierLoc *Platform = ParseIdentifierLoc();
915 // Canonicalize platform name from "macosx" to "macos".
916 if (Platform->Ident && Platform->Ident->getName() == "macosx")
917 Platform->Ident = PP.getIdentifierInfo("macos");
918 // Canonicalize platform name from "macosx_app_extension" to
919 // "macos_app_extension".
920 if (Platform->Ident && Platform->Ident->getName() == "macosx_app_extension")
921 Platform->Ident = PP.getIdentifierInfo("macos_app_extension");
923 // Parse the ',' following the platform name.
924 if (ExpectAndConsume(tok::comma)) {
925 SkipUntil(tok::r_paren, StopAtSemi);
929 // If we haven't grabbed the pointers for the identifiers
930 // "introduced", "deprecated", and "obsoleted", do so now.
931 if (!Ident_introduced) {
932 Ident_introduced = PP.getIdentifierInfo("introduced");
933 Ident_deprecated = PP.getIdentifierInfo("deprecated");
934 Ident_obsoleted = PP.getIdentifierInfo("obsoleted");
935 Ident_unavailable = PP.getIdentifierInfo("unavailable");
936 Ident_message = PP.getIdentifierInfo("message");
937 Ident_strict = PP.getIdentifierInfo("strict");
938 Ident_replacement = PP.getIdentifierInfo("replacement");
941 // Parse the optional "strict", the optional "replacement" and the set of
942 // introductions/deprecations/removals.
943 SourceLocation UnavailableLoc, StrictLoc;
945 if (Tok.isNot(tok::identifier)) {
946 Diag(Tok, diag::err_availability_expected_change);
947 SkipUntil(tok::r_paren, StopAtSemi);
950 IdentifierInfo *Keyword = Tok.getIdentifierInfo();
951 SourceLocation KeywordLoc = ConsumeToken();
953 if (Keyword == Ident_strict) {
954 if (StrictLoc.isValid()) {
955 Diag(KeywordLoc, diag::err_availability_redundant)
956 << Keyword << SourceRange(StrictLoc);
958 StrictLoc = KeywordLoc;
962 if (Keyword == Ident_unavailable) {
963 if (UnavailableLoc.isValid()) {
964 Diag(KeywordLoc, diag::err_availability_redundant)
965 << Keyword << SourceRange(UnavailableLoc);
967 UnavailableLoc = KeywordLoc;
971 if (Tok.isNot(tok::equal)) {
972 Diag(Tok, diag::err_expected_after) << Keyword << tok::equal;
973 SkipUntil(tok::r_paren, StopAtSemi);
977 if (Keyword == Ident_message || Keyword == Ident_replacement) {
978 if (Tok.isNot(tok::string_literal)) {
979 Diag(Tok, diag::err_expected_string_literal)
980 << /*Source='availability attribute'*/2;
981 SkipUntil(tok::r_paren, StopAtSemi);
984 if (Keyword == Ident_message)
985 MessageExpr = ParseStringLiteralExpression();
987 ReplacementExpr = ParseStringLiteralExpression();
988 // Also reject wide string literals.
989 if (StringLiteral *MessageStringLiteral =
990 cast_or_null<StringLiteral>(MessageExpr.get())) {
991 if (MessageStringLiteral->getCharByteWidth() != 1) {
992 Diag(MessageStringLiteral->getSourceRange().getBegin(),
993 diag::err_expected_string_literal)
994 << /*Source='availability attribute'*/ 2;
995 SkipUntil(tok::r_paren, StopAtSemi);
999 if (Keyword == Ident_message)
1005 // Special handling of 'NA' only when applied to introduced or
1007 if ((Keyword == Ident_introduced || Keyword == Ident_deprecated) &&
1008 Tok.is(tok::identifier)) {
1009 IdentifierInfo *NA = Tok.getIdentifierInfo();
1010 if (NA->getName() == "NA") {
1012 if (Keyword == Ident_introduced)
1013 UnavailableLoc = KeywordLoc;
1018 SourceRange VersionRange;
1019 VersionTuple Version = ParseVersionTuple(VersionRange);
1021 if (Version.empty()) {
1022 SkipUntil(tok::r_paren, StopAtSemi);
1027 if (Keyword == Ident_introduced)
1029 else if (Keyword == Ident_deprecated)
1031 else if (Keyword == Ident_obsoleted)
1036 if (Index < Unknown) {
1037 if (!Changes[Index].KeywordLoc.isInvalid()) {
1038 Diag(KeywordLoc, diag::err_availability_redundant)
1040 << SourceRange(Changes[Index].KeywordLoc,
1041 Changes[Index].VersionRange.getEnd());
1044 Changes[Index].KeywordLoc = KeywordLoc;
1045 Changes[Index].Version = Version;
1046 Changes[Index].VersionRange = VersionRange;
1048 Diag(KeywordLoc, diag::err_availability_unknown_change)
1049 << Keyword << VersionRange;
1052 } while (TryConsumeToken(tok::comma));
1055 if (T.consumeClose())
1059 *endLoc = T.getCloseLocation();
1061 // The 'unavailable' availability cannot be combined with any other
1062 // availability changes. Make sure that hasn't happened.
1063 if (UnavailableLoc.isValid()) {
1064 bool Complained = false;
1065 for (unsigned Index = Introduced; Index != Unknown; ++Index) {
1066 if (Changes[Index].KeywordLoc.isValid()) {
1068 Diag(UnavailableLoc, diag::warn_availability_and_unavailable)
1069 << SourceRange(Changes[Index].KeywordLoc,
1070 Changes[Index].VersionRange.getEnd());
1074 // Clear out the availability.
1075 Changes[Index] = AvailabilityChange();
1080 // Record this attribute
1081 attrs.addNew(&Availability,
1082 SourceRange(AvailabilityLoc, T.getCloseLocation()),
1083 ScopeName, ScopeLoc,
1085 Changes[Introduced],
1086 Changes[Deprecated],
1088 UnavailableLoc, MessageExpr.get(),
1089 Syntax, StrictLoc, ReplacementExpr.get());
1092 /// \brief Parse the contents of the "external_source_symbol" attribute.
1094 /// external-source-symbol-attribute:
1095 /// 'external_source_symbol' '(' keyword-arg-list ')'
1097 /// keyword-arg-list:
1099 /// keyword-arg ',' keyword-arg-list
1102 /// 'language' '=' <string>
1103 /// 'defined_in' '=' <string>
1104 /// 'generated_declaration'
1105 void Parser::ParseExternalSourceSymbolAttribute(
1106 IdentifierInfo &ExternalSourceSymbol, SourceLocation Loc,
1107 ParsedAttributes &Attrs, SourceLocation *EndLoc, IdentifierInfo *ScopeName,
1108 SourceLocation ScopeLoc, AttributeList::Syntax Syntax) {
1110 BalancedDelimiterTracker T(*this, tok::l_paren);
1111 if (T.expectAndConsume())
1114 // Initialize the pointers for the keyword identifiers when required.
1115 if (!Ident_language) {
1116 Ident_language = PP.getIdentifierInfo("language");
1117 Ident_defined_in = PP.getIdentifierInfo("defined_in");
1118 Ident_generated_declaration = PP.getIdentifierInfo("generated_declaration");
1121 ExprResult Language;
1122 bool HasLanguage = false;
1123 ExprResult DefinedInExpr;
1124 bool HasDefinedIn = false;
1125 IdentifierLoc *GeneratedDeclaration = nullptr;
1127 // Parse the language/defined_in/generated_declaration keywords
1129 if (Tok.isNot(tok::identifier)) {
1130 Diag(Tok, diag::err_external_source_symbol_expected_keyword);
1131 SkipUntil(tok::r_paren, StopAtSemi);
1135 SourceLocation KeywordLoc = Tok.getLocation();
1136 IdentifierInfo *Keyword = Tok.getIdentifierInfo();
1137 if (Keyword == Ident_generated_declaration) {
1138 if (GeneratedDeclaration) {
1139 Diag(Tok, diag::err_external_source_symbol_duplicate_clause) << Keyword;
1140 SkipUntil(tok::r_paren, StopAtSemi);
1143 GeneratedDeclaration = ParseIdentifierLoc();
1147 if (Keyword != Ident_language && Keyword != Ident_defined_in) {
1148 Diag(Tok, diag::err_external_source_symbol_expected_keyword);
1149 SkipUntil(tok::r_paren, StopAtSemi);
1154 if (ExpectAndConsume(tok::equal, diag::err_expected_after,
1155 Keyword->getName())) {
1156 SkipUntil(tok::r_paren, StopAtSemi);
1160 bool HadLanguage = HasLanguage, HadDefinedIn = HasDefinedIn;
1161 if (Keyword == Ident_language)
1164 HasDefinedIn = true;
1166 if (Tok.isNot(tok::string_literal)) {
1167 Diag(Tok, diag::err_expected_string_literal)
1168 << /*Source='external_source_symbol attribute'*/ 3
1169 << /*language | source container*/ (Keyword != Ident_language);
1170 SkipUntil(tok::comma, tok::r_paren, StopAtSemi | StopBeforeMatch);
1173 if (Keyword == Ident_language) {
1175 Diag(KeywordLoc, diag::err_external_source_symbol_duplicate_clause)
1177 ParseStringLiteralExpression();
1180 Language = ParseStringLiteralExpression();
1182 assert(Keyword == Ident_defined_in && "Invalid clause keyword!");
1184 Diag(KeywordLoc, diag::err_external_source_symbol_duplicate_clause)
1186 ParseStringLiteralExpression();
1189 DefinedInExpr = ParseStringLiteralExpression();
1191 } while (TryConsumeToken(tok::comma));
1194 if (T.consumeClose())
1197 *EndLoc = T.getCloseLocation();
1199 ArgsUnion Args[] = {Language.get(), DefinedInExpr.get(),
1200 GeneratedDeclaration};
1201 Attrs.addNew(&ExternalSourceSymbol, SourceRange(Loc, T.getCloseLocation()),
1202 ScopeName, ScopeLoc, Args, llvm::array_lengthof(Args), Syntax);
1205 /// \brief Parse the contents of the "objc_bridge_related" attribute.
1206 /// objc_bridge_related '(' related_class ',' opt-class_method ',' opt-instance_method ')'
1210 /// opt-class_method:
1211 /// Identifier: | <empty>
1213 /// opt-instance_method:
1214 /// Identifier | <empty>
1216 void Parser::ParseObjCBridgeRelatedAttribute(IdentifierInfo &ObjCBridgeRelated,
1217 SourceLocation ObjCBridgeRelatedLoc,
1218 ParsedAttributes &attrs,
1219 SourceLocation *endLoc,
1220 IdentifierInfo *ScopeName,
1221 SourceLocation ScopeLoc,
1222 AttributeList::Syntax Syntax) {
1224 BalancedDelimiterTracker T(*this, tok::l_paren);
1225 if (T.consumeOpen()) {
1226 Diag(Tok, diag::err_expected) << tok::l_paren;
1230 // Parse the related class name.
1231 if (Tok.isNot(tok::identifier)) {
1232 Diag(Tok, diag::err_objcbridge_related_expected_related_class);
1233 SkipUntil(tok::r_paren, StopAtSemi);
1236 IdentifierLoc *RelatedClass = ParseIdentifierLoc();
1237 if (ExpectAndConsume(tok::comma)) {
1238 SkipUntil(tok::r_paren, StopAtSemi);
1242 // Parse optional class method name.
1243 IdentifierLoc *ClassMethod = nullptr;
1244 if (Tok.is(tok::identifier)) {
1245 ClassMethod = ParseIdentifierLoc();
1246 if (!TryConsumeToken(tok::colon)) {
1247 Diag(Tok, diag::err_objcbridge_related_selector_name);
1248 SkipUntil(tok::r_paren, StopAtSemi);
1252 if (!TryConsumeToken(tok::comma)) {
1253 if (Tok.is(tok::colon))
1254 Diag(Tok, diag::err_objcbridge_related_selector_name);
1256 Diag(Tok, diag::err_expected) << tok::comma;
1257 SkipUntil(tok::r_paren, StopAtSemi);
1261 // Parse optional instance method name.
1262 IdentifierLoc *InstanceMethod = nullptr;
1263 if (Tok.is(tok::identifier))
1264 InstanceMethod = ParseIdentifierLoc();
1265 else if (Tok.isNot(tok::r_paren)) {
1266 Diag(Tok, diag::err_expected) << tok::r_paren;
1267 SkipUntil(tok::r_paren, StopAtSemi);
1272 if (T.consumeClose())
1276 *endLoc = T.getCloseLocation();
1278 // Record this attribute
1279 attrs.addNew(&ObjCBridgeRelated,
1280 SourceRange(ObjCBridgeRelatedLoc, T.getCloseLocation()),
1281 ScopeName, ScopeLoc,
1288 // Late Parsed Attributes:
1289 // See other examples of late parsing in lib/Parse/ParseCXXInlineMethods
1291 void Parser::LateParsedDeclaration::ParseLexedAttributes() {}
1293 void Parser::LateParsedClass::ParseLexedAttributes() {
1294 Self->ParseLexedAttributes(*Class);
1297 void Parser::LateParsedAttribute::ParseLexedAttributes() {
1298 Self->ParseLexedAttribute(*this, true, false);
1301 /// Wrapper class which calls ParseLexedAttribute, after setting up the
1302 /// scope appropriately.
1303 void Parser::ParseLexedAttributes(ParsingClass &Class) {
1304 // Deal with templates
1305 // FIXME: Test cases to make sure this does the right thing for templates.
1306 bool HasTemplateScope = !Class.TopLevelClass && Class.TemplateScope;
1307 ParseScope ClassTemplateScope(this, Scope::TemplateParamScope,
1309 if (HasTemplateScope)
1310 Actions.ActOnReenterTemplateScope(getCurScope(), Class.TagOrTemplate);
1312 // Set or update the scope flags.
1313 bool AlreadyHasClassScope = Class.TopLevelClass;
1314 unsigned ScopeFlags = Scope::ClassScope|Scope::DeclScope;
1315 ParseScope ClassScope(this, ScopeFlags, !AlreadyHasClassScope);
1316 ParseScopeFlags ClassScopeFlags(this, ScopeFlags, AlreadyHasClassScope);
1318 // Enter the scope of nested classes
1319 if (!AlreadyHasClassScope)
1320 Actions.ActOnStartDelayedMemberDeclarations(getCurScope(),
1321 Class.TagOrTemplate);
1322 if (!Class.LateParsedDeclarations.empty()) {
1323 for (unsigned i = 0, ni = Class.LateParsedDeclarations.size(); i < ni; ++i){
1324 Class.LateParsedDeclarations[i]->ParseLexedAttributes();
1328 if (!AlreadyHasClassScope)
1329 Actions.ActOnFinishDelayedMemberDeclarations(getCurScope(),
1330 Class.TagOrTemplate);
1333 /// \brief Parse all attributes in LAs, and attach them to Decl D.
1334 void Parser::ParseLexedAttributeList(LateParsedAttrList &LAs, Decl *D,
1335 bool EnterScope, bool OnDefinition) {
1336 assert(LAs.parseSoon() &&
1337 "Attribute list should be marked for immediate parsing.");
1338 for (unsigned i = 0, ni = LAs.size(); i < ni; ++i) {
1341 ParseLexedAttribute(*LAs[i], EnterScope, OnDefinition);
1347 /// \brief Finish parsing an attribute for which parsing was delayed.
1348 /// This will be called at the end of parsing a class declaration
1349 /// for each LateParsedAttribute. We consume the saved tokens and
1350 /// create an attribute with the arguments filled in. We add this
1351 /// to the Attribute list for the decl.
1352 void Parser::ParseLexedAttribute(LateParsedAttribute &LA,
1353 bool EnterScope, bool OnDefinition) {
1354 // Create a fake EOF so that attribute parsing won't go off the end of the
1357 AttrEnd.startToken();
1358 AttrEnd.setKind(tok::eof);
1359 AttrEnd.setLocation(Tok.getLocation());
1360 AttrEnd.setEofData(LA.Toks.data());
1361 LA.Toks.push_back(AttrEnd);
1363 // Append the current token at the end of the new token stream so that it
1364 // doesn't get lost.
1365 LA.Toks.push_back(Tok);
1366 PP.EnterTokenStream(LA.Toks, true);
1367 // Consume the previously pushed token.
1368 ConsumeAnyToken(/*ConsumeCodeCompletionTok=*/true);
1370 ParsedAttributes Attrs(AttrFactory);
1371 SourceLocation endLoc;
1373 if (LA.Decls.size() > 0) {
1374 Decl *D = LA.Decls[0];
1375 NamedDecl *ND = dyn_cast<NamedDecl>(D);
1376 RecordDecl *RD = dyn_cast_or_null<RecordDecl>(D->getDeclContext());
1378 // Allow 'this' within late-parsed attributes.
1379 Sema::CXXThisScopeRAII ThisScope(Actions, RD, /*TypeQuals=*/0,
1380 ND && ND->isCXXInstanceMember());
1382 if (LA.Decls.size() == 1) {
1383 // If the Decl is templatized, add template parameters to scope.
1384 bool HasTemplateScope = EnterScope && D->isTemplateDecl();
1385 ParseScope TempScope(this, Scope::TemplateParamScope, HasTemplateScope);
1386 if (HasTemplateScope)
1387 Actions.ActOnReenterTemplateScope(Actions.CurScope, D);
1389 // If the Decl is on a function, add function parameters to the scope.
1390 bool HasFunScope = EnterScope && D->isFunctionOrFunctionTemplate();
1391 ParseScope FnScope(this, Scope::FnScope|Scope::DeclScope, HasFunScope);
1393 Actions.ActOnReenterFunctionContext(Actions.CurScope, D);
1395 ParseGNUAttributeArgs(&LA.AttrName, LA.AttrNameLoc, Attrs, &endLoc,
1396 nullptr, SourceLocation(), AttributeList::AS_GNU,
1400 Actions.ActOnExitFunctionContext();
1401 FnScope.Exit(); // Pop scope, and remove Decls from IdResolver
1403 if (HasTemplateScope) {
1407 // If there are multiple decls, then the decl cannot be within the
1409 ParseGNUAttributeArgs(&LA.AttrName, LA.AttrNameLoc, Attrs, &endLoc,
1410 nullptr, SourceLocation(), AttributeList::AS_GNU,
1414 Diag(Tok, diag::warn_attribute_no_decl) << LA.AttrName.getName();
1417 const AttributeList *AL = Attrs.getList();
1418 if (OnDefinition && AL && !AL->isCXX11Attribute() &&
1420 Diag(Tok, diag::warn_attribute_on_function_definition)
1423 for (unsigned i = 0, ni = LA.Decls.size(); i < ni; ++i)
1424 Actions.ActOnFinishDelayedAttribute(getCurScope(), LA.Decls[i], Attrs);
1426 // Due to a parsing error, we either went over the cached tokens or
1427 // there are still cached tokens left, so we skip the leftover tokens.
1428 while (Tok.isNot(tok::eof))
1431 if (Tok.is(tok::eof) && Tok.getEofData() == AttrEnd.getEofData())
1435 void Parser::ParseTypeTagForDatatypeAttribute(IdentifierInfo &AttrName,
1436 SourceLocation AttrNameLoc,
1437 ParsedAttributes &Attrs,
1438 SourceLocation *EndLoc,
1439 IdentifierInfo *ScopeName,
1440 SourceLocation ScopeLoc,
1441 AttributeList::Syntax Syntax) {
1442 assert(Tok.is(tok::l_paren) && "Attribute arg list not starting with '('");
1444 BalancedDelimiterTracker T(*this, tok::l_paren);
1447 if (Tok.isNot(tok::identifier)) {
1448 Diag(Tok, diag::err_expected) << tok::identifier;
1452 IdentifierLoc *ArgumentKind = ParseIdentifierLoc();
1454 if (ExpectAndConsume(tok::comma)) {
1459 SourceRange MatchingCTypeRange;
1460 TypeResult MatchingCType = ParseTypeName(&MatchingCTypeRange);
1461 if (MatchingCType.isInvalid()) {
1466 bool LayoutCompatible = false;
1467 bool MustBeNull = false;
1468 while (TryConsumeToken(tok::comma)) {
1469 if (Tok.isNot(tok::identifier)) {
1470 Diag(Tok, diag::err_expected) << tok::identifier;
1474 IdentifierInfo *Flag = Tok.getIdentifierInfo();
1475 if (Flag->isStr("layout_compatible"))
1476 LayoutCompatible = true;
1477 else if (Flag->isStr("must_be_null"))
1480 Diag(Tok, diag::err_type_safety_unknown_flag) << Flag;
1484 ConsumeToken(); // consume flag
1487 if (!T.consumeClose()) {
1488 Attrs.addNewTypeTagForDatatype(&AttrName, AttrNameLoc, ScopeName, ScopeLoc,
1489 ArgumentKind, MatchingCType.get(),
1490 LayoutCompatible, MustBeNull, Syntax);
1494 *EndLoc = T.getCloseLocation();
1497 /// DiagnoseProhibitedCXX11Attribute - We have found the opening square brackets
1498 /// of a C++11 attribute-specifier in a location where an attribute is not
1499 /// permitted. By C++11 [dcl.attr.grammar]p6, this is ill-formed. Diagnose this
1502 /// \return \c true if we skipped an attribute-like chunk of tokens, \c false if
1503 /// this doesn't appear to actually be an attribute-specifier, and the caller
1504 /// should try to parse it.
1505 bool Parser::DiagnoseProhibitedCXX11Attribute() {
1506 assert(Tok.is(tok::l_square) && NextToken().is(tok::l_square));
1508 switch (isCXX11AttributeSpecifier(/*Disambiguate*/true)) {
1509 case CAK_NotAttributeSpecifier:
1510 // No diagnostic: we're in Obj-C++11 and this is not actually an attribute.
1513 case CAK_InvalidAttributeSpecifier:
1514 Diag(Tok.getLocation(), diag::err_l_square_l_square_not_attribute);
1517 case CAK_AttributeSpecifier:
1518 // Parse and discard the attributes.
1519 SourceLocation BeginLoc = ConsumeBracket();
1521 SkipUntil(tok::r_square);
1522 assert(Tok.is(tok::r_square) && "isCXX11AttributeSpecifier lied");
1523 SourceLocation EndLoc = ConsumeBracket();
1524 Diag(BeginLoc, diag::err_attributes_not_allowed)
1525 << SourceRange(BeginLoc, EndLoc);
1528 llvm_unreachable("All cases handled above.");
1531 /// \brief We have found the opening square brackets of a C++11
1532 /// attribute-specifier in a location where an attribute is not permitted, but
1533 /// we know where the attributes ought to be written. Parse them anyway, and
1534 /// provide a fixit moving them to the right place.
1535 void Parser::DiagnoseMisplacedCXX11Attribute(ParsedAttributesWithRange &Attrs,
1536 SourceLocation CorrectLocation) {
1537 assert((Tok.is(tok::l_square) && NextToken().is(tok::l_square)) ||
1538 Tok.is(tok::kw_alignas));
1540 // Consume the attributes.
1541 SourceLocation Loc = Tok.getLocation();
1542 ParseCXX11Attributes(Attrs);
1543 CharSourceRange AttrRange(SourceRange(Loc, Attrs.Range.getEnd()), true);
1545 Diag(Loc, diag::err_attributes_not_allowed)
1546 << FixItHint::CreateInsertionFromRange(CorrectLocation, AttrRange)
1547 << FixItHint::CreateRemoval(AttrRange);
1550 void Parser::DiagnoseProhibitedAttributes(ParsedAttributesWithRange &attrs) {
1551 Diag(attrs.Range.getBegin(), diag::err_attributes_not_allowed)
1555 void Parser::ProhibitCXX11Attributes(ParsedAttributesWithRange &Attrs,
1557 for (AttributeList *Attr = Attrs.getList(); Attr; Attr = Attr->getNext()) {
1558 if (!Attr->isCXX11Attribute())
1560 if (Attr->getKind() == AttributeList::UnknownAttribute)
1561 Diag(Attr->getLoc(), diag::warn_unknown_attribute_ignored)
1564 Diag(Attr->getLoc(), DiagID)
1571 // Usually, `__attribute__((attrib)) class Foo {} var` means that attribute
1572 // applies to var, not the type Foo.
1573 // As an exception to the rule, __declspec(align(...)) before the
1574 // class-key affects the type instead of the variable.
1575 // Also, Microsoft-style [attributes] seem to affect the type instead of the
1577 // This function moves attributes that should apply to the type off DS to Attrs.
1578 void Parser::stripTypeAttributesOffDeclSpec(ParsedAttributesWithRange &Attrs,
1580 Sema::TagUseKind TUK) {
1581 if (TUK == Sema::TUK_Reference)
1584 ParsedAttributes &PA = DS.getAttributes();
1585 AttributeList *AL = PA.getList();
1586 AttributeList *Prev = nullptr;
1587 AttributeList *TypeAttrHead = nullptr;
1588 AttributeList *TypeAttrTail = nullptr;
1590 AttributeList *Next = AL->getNext();
1592 if ((AL->getKind() == AttributeList::AT_Aligned &&
1593 AL->isDeclspecAttribute()) ||
1594 AL->isMicrosoftAttribute()) {
1595 // Stitch the attribute into the tag's attribute list.
1597 TypeAttrTail->setNext(AL);
1601 TypeAttrTail->setNext(nullptr);
1603 // Remove the attribute from the variable's attribute list.
1605 // Set the last variable attribute's next attribute to be the attribute
1606 // after the current one.
1607 Prev->setNext(Next);
1609 // Removing the head of the list requires us to reset the head to the
1620 // Find end of type attributes Attrs and add NewTypeAttributes in the same
1621 // order they were in originally. (Remember, in AttributeList things earlier
1622 // in source order are later in the list, since new attributes are added to
1623 // the front of the list.)
1624 Attrs.addAllAtEnd(TypeAttrHead);
1627 /// ParseDeclaration - Parse a full 'declaration', which consists of
1628 /// declaration-specifiers, some number of declarators, and a semicolon.
1629 /// 'Context' should be a Declarator::TheContext value. This returns the
1630 /// location of the semicolon in DeclEnd.
1632 /// declaration: [C99 6.7]
1633 /// block-declaration ->
1634 /// simple-declaration
1636 /// [C++] template-declaration
1637 /// [C++] namespace-definition
1638 /// [C++] using-directive
1639 /// [C++] using-declaration
1640 /// [C++11/C11] static_assert-declaration
1641 /// others... [FIXME]
1643 Parser::DeclGroupPtrTy Parser::ParseDeclaration(unsigned Context,
1644 SourceLocation &DeclEnd,
1645 ParsedAttributesWithRange &attrs) {
1646 ParenBraceBracketBalancer BalancerRAIIObj(*this);
1647 // Must temporarily exit the objective-c container scope for
1648 // parsing c none objective-c decls.
1649 ObjCDeclContextSwitch ObjCDC(*this);
1651 Decl *SingleDecl = nullptr;
1652 switch (Tok.getKind()) {
1653 case tok::kw_template:
1654 case tok::kw_export:
1655 ProhibitAttributes(attrs);
1656 SingleDecl = ParseDeclarationStartingWithTemplate(Context, DeclEnd);
1658 case tok::kw_inline:
1659 // Could be the start of an inline namespace. Allowed as an ext in C++03.
1660 if (getLangOpts().CPlusPlus && NextToken().is(tok::kw_namespace)) {
1661 ProhibitAttributes(attrs);
1662 SourceLocation InlineLoc = ConsumeToken();
1663 return ParseNamespace(Context, DeclEnd, InlineLoc);
1665 return ParseSimpleDeclaration(Context, DeclEnd, attrs,
1667 case tok::kw_namespace:
1668 ProhibitAttributes(attrs);
1669 return ParseNamespace(Context, DeclEnd);
1671 return ParseUsingDirectiveOrDeclaration(Context, ParsedTemplateInfo(),
1673 case tok::kw_static_assert:
1674 case tok::kw__Static_assert:
1675 ProhibitAttributes(attrs);
1676 SingleDecl = ParseStaticAssertDeclaration(DeclEnd);
1679 return ParseSimpleDeclaration(Context, DeclEnd, attrs, true);
1682 // This routine returns a DeclGroup, if the thing we parsed only contains a
1683 // single decl, convert it now.
1684 return Actions.ConvertDeclToDeclGroup(SingleDecl);
1687 /// simple-declaration: [C99 6.7: declaration] [C++ 7p1: dcl.dcl]
1688 /// declaration-specifiers init-declarator-list[opt] ';'
1689 /// [C++11] attribute-specifier-seq decl-specifier-seq[opt]
1690 /// init-declarator-list ';'
1691 ///[C90/C++]init-declarator-list ';' [TODO]
1692 /// [OMP] threadprivate-directive [TODO]
1694 /// for-range-declaration: [C++11 6.5p1: stmt.ranged]
1695 /// attribute-specifier-seq[opt] type-specifier-seq declarator
1697 /// If RequireSemi is false, this does not check for a ';' at the end of the
1698 /// declaration. If it is true, it checks for and eats it.
1700 /// If FRI is non-null, we might be parsing a for-range-declaration instead
1701 /// of a simple-declaration. If we find that we are, we also parse the
1702 /// for-range-initializer, and place it here.
1703 Parser::DeclGroupPtrTy
1704 Parser::ParseSimpleDeclaration(unsigned Context,
1705 SourceLocation &DeclEnd,
1706 ParsedAttributesWithRange &Attrs,
1707 bool RequireSemi, ForRangeInit *FRI) {
1708 // Parse the common declaration-specifiers piece.
1709 ParsingDeclSpec DS(*this);
1711 DeclSpecContext DSContext = getDeclSpecContextFromDeclaratorContext(Context);
1712 ParseDeclarationSpecifiers(DS, ParsedTemplateInfo(), AS_none, DSContext);
1714 // If we had a free-standing type definition with a missing semicolon, we
1715 // may get this far before the problem becomes obvious.
1716 if (DS.hasTagDefinition() &&
1717 DiagnoseMissingSemiAfterTagDefinition(DS, AS_none, DSContext))
1720 // C99 6.7.2.3p6: Handle "struct-or-union identifier;", "enum { X };"
1721 // declaration-specifiers init-declarator-list[opt] ';'
1722 if (Tok.is(tok::semi)) {
1723 ProhibitAttributes(Attrs);
1724 DeclEnd = Tok.getLocation();
1725 if (RequireSemi) ConsumeToken();
1726 RecordDecl *AnonRecord = nullptr;
1727 Decl *TheDecl = Actions.ParsedFreeStandingDeclSpec(getCurScope(), AS_none,
1729 DS.complete(TheDecl);
1731 Decl* decls[] = {AnonRecord, TheDecl};
1732 return Actions.BuildDeclaratorGroup(decls);
1734 return Actions.ConvertDeclToDeclGroup(TheDecl);
1737 DS.takeAttributesFrom(Attrs);
1738 return ParseDeclGroup(DS, Context, &DeclEnd, FRI);
1741 /// Returns true if this might be the start of a declarator, or a common typo
1742 /// for a declarator.
1743 bool Parser::MightBeDeclarator(unsigned Context) {
1744 switch (Tok.getKind()) {
1745 case tok::annot_cxxscope:
1746 case tok::annot_template_id:
1748 case tok::code_completion:
1749 case tok::coloncolon:
1751 case tok::kw___attribute:
1752 case tok::kw_operator:
1759 return getLangOpts().CPlusPlus;
1761 case tok::l_square: // Might be an attribute on an unnamed bit-field.
1762 return Context == Declarator::MemberContext && getLangOpts().CPlusPlus11 &&
1763 NextToken().is(tok::l_square);
1765 case tok::colon: // Might be a typo for '::' or an unnamed bit-field.
1766 return Context == Declarator::MemberContext || getLangOpts().CPlusPlus;
1768 case tok::identifier:
1769 switch (NextToken().getKind()) {
1770 case tok::code_completion:
1771 case tok::coloncolon:
1774 case tok::equalequal: // Might be a typo for '='.
1775 case tok::kw_alignas:
1777 case tok::kw___attribute:
1789 // At namespace scope, 'identifier:' is probably a typo for 'identifier::'
1790 // and in block scope it's probably a label. Inside a class definition,
1791 // this is a bit-field.
1792 return Context == Declarator::MemberContext ||
1793 (getLangOpts().CPlusPlus && Context == Declarator::FileContext);
1795 case tok::identifier: // Possible virt-specifier.
1796 return getLangOpts().CPlusPlus11 && isCXX11VirtSpecifier(NextToken());
1807 /// Skip until we reach something which seems like a sensible place to pick
1808 /// up parsing after a malformed declaration. This will sometimes stop sooner
1809 /// than SkipUntil(tok::r_brace) would, but will never stop later.
1810 void Parser::SkipMalformedDecl() {
1812 switch (Tok.getKind()) {
1814 // Skip until matching }, then stop. We've probably skipped over
1815 // a malformed class or function definition or similar.
1817 SkipUntil(tok::r_brace);
1818 if (Tok.isOneOf(tok::comma, tok::l_brace, tok::kw_try)) {
1819 // This declaration isn't over yet. Keep skipping.
1822 TryConsumeToken(tok::semi);
1827 SkipUntil(tok::r_square);
1832 SkipUntil(tok::r_paren);
1842 case tok::kw_inline:
1843 // 'inline namespace' at the start of a line is almost certainly
1844 // a good place to pick back up parsing, except in an Objective-C
1845 // @interface context.
1846 if (Tok.isAtStartOfLine() && NextToken().is(tok::kw_namespace) &&
1847 (!ParsingInObjCContainer || CurParsedObjCImpl))
1851 case tok::kw_namespace:
1852 // 'namespace' at the start of a line is almost certainly a good
1853 // place to pick back up parsing, except in an Objective-C
1854 // @interface context.
1855 if (Tok.isAtStartOfLine() &&
1856 (!ParsingInObjCContainer || CurParsedObjCImpl))
1861 // @end is very much like } in Objective-C contexts.
1862 if (NextToken().isObjCAtKeyword(tok::objc_end) &&
1863 ParsingInObjCContainer)
1869 // - and + probably start new method declarations in Objective-C contexts.
1870 if (Tok.isAtStartOfLine() && ParsingInObjCContainer)
1875 case tok::annot_module_begin:
1876 case tok::annot_module_end:
1877 case tok::annot_module_include:
1888 /// ParseDeclGroup - Having concluded that this is either a function
1889 /// definition or a group of object declarations, actually parse the
1891 Parser::DeclGroupPtrTy Parser::ParseDeclGroup(ParsingDeclSpec &DS,
1893 SourceLocation *DeclEnd,
1894 ForRangeInit *FRI) {
1895 // Parse the first declarator.
1896 ParsingDeclarator D(*this, DS, static_cast<Declarator::TheContext>(Context));
1899 // Bail out if the first declarator didn't seem well-formed.
1900 if (!D.hasName() && !D.mayOmitIdentifier()) {
1901 SkipMalformedDecl();
1905 // Save late-parsed attributes for now; they need to be parsed in the
1906 // appropriate function scope after the function Decl has been constructed.
1907 // These will be parsed in ParseFunctionDefinition or ParseLexedAttrList.
1908 LateParsedAttrList LateParsedAttrs(true);
1909 if (D.isFunctionDeclarator()) {
1910 MaybeParseGNUAttributes(D, &LateParsedAttrs);
1912 // The _Noreturn keyword can't appear here, unlike the GNU noreturn
1913 // attribute. If we find the keyword here, tell the user to put it
1914 // at the start instead.
1915 if (Tok.is(tok::kw__Noreturn)) {
1916 SourceLocation Loc = ConsumeToken();
1917 const char *PrevSpec;
1920 // We can offer a fixit if it's valid to mark this function as _Noreturn
1921 // and we don't have any other declarators in this declaration.
1922 bool Fixit = !DS.setFunctionSpecNoreturn(Loc, PrevSpec, DiagID);
1923 MaybeParseGNUAttributes(D, &LateParsedAttrs);
1924 Fixit &= Tok.isOneOf(tok::semi, tok::l_brace, tok::kw_try);
1926 Diag(Loc, diag::err_c11_noreturn_misplaced)
1927 << (Fixit ? FixItHint::CreateRemoval(Loc) : FixItHint())
1928 << (Fixit ? FixItHint::CreateInsertion(D.getLocStart(), "_Noreturn ")
1933 // Check to see if we have a function *definition* which must have a body.
1934 if (D.isFunctionDeclarator() &&
1935 // Look at the next token to make sure that this isn't a function
1936 // declaration. We have to check this because __attribute__ might be the
1937 // start of a function definition in GCC-extended K&R C.
1938 !isDeclarationAfterDeclarator()) {
1940 // Function definitions are only allowed at file scope and in C++ classes.
1941 // The C++ inline method definition case is handled elsewhere, so we only
1942 // need to handle the file scope definition case.
1943 if (Context == Declarator::FileContext) {
1944 if (isStartOfFunctionDefinition(D)) {
1945 if (DS.getStorageClassSpec() == DeclSpec::SCS_typedef) {
1946 Diag(Tok, diag::err_function_declared_typedef);
1948 // Recover by treating the 'typedef' as spurious.
1949 DS.ClearStorageClassSpecs();
1953 ParseFunctionDefinition(D, ParsedTemplateInfo(), &LateParsedAttrs);
1954 return Actions.ConvertDeclToDeclGroup(TheDecl);
1957 if (isDeclarationSpecifier()) {
1958 // If there is an invalid declaration specifier right after the
1959 // function prototype, then we must be in a missing semicolon case
1960 // where this isn't actually a body. Just fall through into the code
1961 // that handles it as a prototype, and let the top-level code handle
1962 // the erroneous declspec where it would otherwise expect a comma or
1965 Diag(Tok, diag::err_expected_fn_body);
1966 SkipUntil(tok::semi);
1970 if (Tok.is(tok::l_brace)) {
1971 Diag(Tok, diag::err_function_definition_not_allowed);
1972 SkipMalformedDecl();
1978 if (ParseAsmAttributesAfterDeclarator(D))
1981 // C++0x [stmt.iter]p1: Check if we have a for-range-declarator. If so, we
1982 // must parse and analyze the for-range-initializer before the declaration is
1985 // Handle the Objective-C for-in loop variable similarly, although we
1986 // don't need to parse the container in advance.
1987 if (FRI && (Tok.is(tok::colon) || isTokIdentifier_in())) {
1988 bool IsForRangeLoop = false;
1989 if (TryConsumeToken(tok::colon, FRI->ColonLoc)) {
1990 IsForRangeLoop = true;
1991 if (Tok.is(tok::l_brace))
1992 FRI->RangeExpr = ParseBraceInitializer();
1994 FRI->RangeExpr = ParseExpression();
1997 Decl *ThisDecl = Actions.ActOnDeclarator(getCurScope(), D);
1999 Actions.ActOnCXXForRangeDecl(ThisDecl);
2000 Actions.FinalizeDeclaration(ThisDecl);
2001 D.complete(ThisDecl);
2002 return Actions.FinalizeDeclaratorGroup(getCurScope(), DS, ThisDecl);
2005 SmallVector<Decl *, 8> DeclsInGroup;
2006 Decl *FirstDecl = ParseDeclarationAfterDeclaratorAndAttributes(
2007 D, ParsedTemplateInfo(), FRI);
2008 if (LateParsedAttrs.size() > 0)
2009 ParseLexedAttributeList(LateParsedAttrs, FirstDecl, true, false);
2010 D.complete(FirstDecl);
2012 DeclsInGroup.push_back(FirstDecl);
2014 bool ExpectSemi = Context != Declarator::ForContext;
2016 // If we don't have a comma, it is either the end of the list (a ';') or an
2018 SourceLocation CommaLoc;
2019 while (TryConsumeToken(tok::comma, CommaLoc)) {
2020 if (Tok.isAtStartOfLine() && ExpectSemi && !MightBeDeclarator(Context)) {
2021 // This comma was followed by a line-break and something which can't be
2022 // the start of a declarator. The comma was probably a typo for a
2024 Diag(CommaLoc, diag::err_expected_semi_declaration)
2025 << FixItHint::CreateReplacement(CommaLoc, ";");
2030 // Parse the next declarator.
2032 D.setCommaLoc(CommaLoc);
2034 // Accept attributes in an init-declarator. In the first declarator in a
2035 // declaration, these would be part of the declspec. In subsequent
2036 // declarators, they become part of the declarator itself, so that they
2037 // don't apply to declarators after *this* one. Examples:
2038 // short __attribute__((common)) var; -> declspec
2039 // short var __attribute__((common)); -> declarator
2040 // short x, __attribute__((common)) var; -> declarator
2041 MaybeParseGNUAttributes(D);
2043 // MSVC parses but ignores qualifiers after the comma as an extension.
2044 if (getLangOpts().MicrosoftExt)
2045 DiagnoseAndSkipExtendedMicrosoftTypeAttributes();
2048 if (!D.isInvalidType()) {
2049 Decl *ThisDecl = ParseDeclarationAfterDeclarator(D);
2050 D.complete(ThisDecl);
2052 DeclsInGroup.push_back(ThisDecl);
2057 *DeclEnd = Tok.getLocation();
2060 ExpectAndConsumeSemi(Context == Declarator::FileContext
2061 ? diag::err_invalid_token_after_toplevel_declarator
2062 : diag::err_expected_semi_declaration)) {
2063 // Okay, there was no semicolon and one was expected. If we see a
2064 // declaration specifier, just assume it was missing and continue parsing.
2065 // Otherwise things are very confused and we skip to recover.
2066 if (!isDeclarationSpecifier()) {
2067 SkipUntil(tok::r_brace, StopAtSemi | StopBeforeMatch);
2068 TryConsumeToken(tok::semi);
2072 return Actions.FinalizeDeclaratorGroup(getCurScope(), DS, DeclsInGroup);
2075 /// Parse an optional simple-asm-expr and attributes, and attach them to a
2076 /// declarator. Returns true on an error.
2077 bool Parser::ParseAsmAttributesAfterDeclarator(Declarator &D) {
2078 // If a simple-asm-expr is present, parse it.
2079 if (Tok.is(tok::kw_asm)) {
2081 ExprResult AsmLabel(ParseSimpleAsm(&Loc));
2082 if (AsmLabel.isInvalid()) {
2083 SkipUntil(tok::semi, StopBeforeMatch);
2087 D.setAsmLabel(AsmLabel.get());
2091 MaybeParseGNUAttributes(D);
2095 /// \brief Parse 'declaration' after parsing 'declaration-specifiers
2096 /// declarator'. This method parses the remainder of the declaration
2097 /// (including any attributes or initializer, among other things) and
2098 /// finalizes the declaration.
2100 /// init-declarator: [C99 6.7]
2102 /// declarator '=' initializer
2103 /// [GNU] declarator simple-asm-expr[opt] attributes[opt]
2104 /// [GNU] declarator simple-asm-expr[opt] attributes[opt] '=' initializer
2105 /// [C++] declarator initializer[opt]
2107 /// [C++] initializer:
2108 /// [C++] '=' initializer-clause
2109 /// [C++] '(' expression-list ')'
2110 /// [C++0x] '=' 'default' [TODO]
2111 /// [C++0x] '=' 'delete'
2112 /// [C++0x] braced-init-list
2114 /// According to the standard grammar, =default and =delete are function
2115 /// definitions, but that definitely doesn't fit with the parser here.
2117 Decl *Parser::ParseDeclarationAfterDeclarator(
2118 Declarator &D, const ParsedTemplateInfo &TemplateInfo) {
2119 if (ParseAsmAttributesAfterDeclarator(D))
2122 return ParseDeclarationAfterDeclaratorAndAttributes(D, TemplateInfo);
2125 Decl *Parser::ParseDeclarationAfterDeclaratorAndAttributes(
2126 Declarator &D, const ParsedTemplateInfo &TemplateInfo, ForRangeInit *FRI) {
2127 // Inform the current actions module that we just parsed this declarator.
2128 Decl *ThisDecl = nullptr;
2129 switch (TemplateInfo.Kind) {
2130 case ParsedTemplateInfo::NonTemplate:
2131 ThisDecl = Actions.ActOnDeclarator(getCurScope(), D);
2134 case ParsedTemplateInfo::Template:
2135 case ParsedTemplateInfo::ExplicitSpecialization: {
2136 ThisDecl = Actions.ActOnTemplateDeclarator(getCurScope(),
2137 *TemplateInfo.TemplateParams,
2139 if (VarTemplateDecl *VT = dyn_cast_or_null<VarTemplateDecl>(ThisDecl))
2140 // Re-direct this decl to refer to the templated decl so that we can
2142 ThisDecl = VT->getTemplatedDecl();
2145 case ParsedTemplateInfo::ExplicitInstantiation: {
2146 if (Tok.is(tok::semi)) {
2147 DeclResult ThisRes = Actions.ActOnExplicitInstantiation(
2148 getCurScope(), TemplateInfo.ExternLoc, TemplateInfo.TemplateLoc, D);
2149 if (ThisRes.isInvalid()) {
2150 SkipUntil(tok::semi, StopBeforeMatch);
2153 ThisDecl = ThisRes.get();
2155 // FIXME: This check should be for a variable template instantiation only.
2157 // Check that this is a valid instantiation
2158 if (D.getName().getKind() != UnqualifiedId::IK_TemplateId) {
2159 // If the declarator-id is not a template-id, issue a diagnostic and
2160 // recover by ignoring the 'template' keyword.
2161 Diag(Tok, diag::err_template_defn_explicit_instantiation)
2162 << 2 << FixItHint::CreateRemoval(TemplateInfo.TemplateLoc);
2163 ThisDecl = Actions.ActOnDeclarator(getCurScope(), D);
2165 SourceLocation LAngleLoc =
2166 PP.getLocForEndOfToken(TemplateInfo.TemplateLoc);
2167 Diag(D.getIdentifierLoc(),
2168 diag::err_explicit_instantiation_with_definition)
2169 << SourceRange(TemplateInfo.TemplateLoc)
2170 << FixItHint::CreateInsertion(LAngleLoc, "<>");
2172 // Recover as if it were an explicit specialization.
2173 TemplateParameterLists FakedParamLists;
2174 FakedParamLists.push_back(Actions.ActOnTemplateParameterList(
2175 0, SourceLocation(), TemplateInfo.TemplateLoc, LAngleLoc, None,
2176 LAngleLoc, nullptr));
2179 Actions.ActOnTemplateDeclarator(getCurScope(), FakedParamLists, D);
2186 // Parse declarator '=' initializer.
2187 // If a '==' or '+=' is found, suggest a fixit to '='.
2188 if (isTokenEqualOrEqualTypo()) {
2189 SourceLocation EqualLoc = ConsumeToken();
2191 if (Tok.is(tok::kw_delete)) {
2192 if (D.isFunctionDeclarator())
2193 Diag(ConsumeToken(), diag::err_default_delete_in_multiple_declaration)
2196 Diag(ConsumeToken(), diag::err_deleted_non_function);
2197 } else if (Tok.is(tok::kw_default)) {
2198 if (D.isFunctionDeclarator())
2199 Diag(ConsumeToken(), diag::err_default_delete_in_multiple_declaration)
2202 Diag(ConsumeToken(), diag::err_default_special_members);
2204 if (getLangOpts().CPlusPlus && D.getCXXScopeSpec().isSet()) {
2206 Actions.ActOnCXXEnterDeclInitializer(getCurScope(), ThisDecl);
2209 if (Tok.is(tok::code_completion)) {
2210 Actions.CodeCompleteInitializer(getCurScope(), ThisDecl);
2211 Actions.FinalizeDeclaration(ThisDecl);
2216 ExprResult Init(ParseInitializer());
2218 // If this is the only decl in (possibly) range based for statement,
2219 // our best guess is that the user meant ':' instead of '='.
2220 if (Tok.is(tok::r_paren) && FRI && D.isFirstDeclarator()) {
2221 Diag(EqualLoc, diag::err_single_decl_assign_in_for_range)
2222 << FixItHint::CreateReplacement(EqualLoc, ":");
2223 // We are trying to stop parser from looking for ';' in this for
2224 // statement, therefore preventing spurious errors to be issued.
2225 FRI->ColonLoc = EqualLoc;
2227 FRI->RangeExpr = Init;
2230 if (getLangOpts().CPlusPlus && D.getCXXScopeSpec().isSet()) {
2231 Actions.ActOnCXXExitDeclInitializer(getCurScope(), ThisDecl);
2235 if (Init.isInvalid()) {
2236 SmallVector<tok::TokenKind, 2> StopTokens;
2237 StopTokens.push_back(tok::comma);
2238 if (D.getContext() == Declarator::ForContext ||
2239 D.getContext() == Declarator::InitStmtContext)
2240 StopTokens.push_back(tok::r_paren);
2241 SkipUntil(StopTokens, StopAtSemi | StopBeforeMatch);
2242 Actions.ActOnInitializerError(ThisDecl);
2244 Actions.AddInitializerToDecl(ThisDecl, Init.get(),
2245 /*DirectInit=*/false);
2247 } else if (Tok.is(tok::l_paren)) {
2248 // Parse C++ direct initializer: '(' expression-list ')'
2249 BalancedDelimiterTracker T(*this, tok::l_paren);
2253 CommaLocsTy CommaLocs;
2255 if (getLangOpts().CPlusPlus && D.getCXXScopeSpec().isSet()) {
2257 Actions.ActOnCXXEnterDeclInitializer(getCurScope(), ThisDecl);
2260 if (ParseExpressionList(Exprs, CommaLocs, [&] {
2261 Actions.CodeCompleteConstructor(getCurScope(),
2262 cast<VarDecl>(ThisDecl)->getType()->getCanonicalTypeInternal(),
2263 ThisDecl->getLocation(), Exprs);
2265 Actions.ActOnInitializerError(ThisDecl);
2266 SkipUntil(tok::r_paren, StopAtSemi);
2268 if (getLangOpts().CPlusPlus && D.getCXXScopeSpec().isSet()) {
2269 Actions.ActOnCXXExitDeclInitializer(getCurScope(), ThisDecl);
2276 assert(!Exprs.empty() && Exprs.size()-1 == CommaLocs.size() &&
2277 "Unexpected number of commas!");
2279 if (getLangOpts().CPlusPlus && D.getCXXScopeSpec().isSet()) {
2280 Actions.ActOnCXXExitDeclInitializer(getCurScope(), ThisDecl);
2284 ExprResult Initializer = Actions.ActOnParenListExpr(T.getOpenLocation(),
2285 T.getCloseLocation(),
2287 Actions.AddInitializerToDecl(ThisDecl, Initializer.get(),
2288 /*DirectInit=*/true);
2290 } else if (getLangOpts().CPlusPlus11 && Tok.is(tok::l_brace) &&
2291 (!CurParsedObjCImpl || !D.isFunctionDeclarator())) {
2292 // Parse C++0x braced-init-list.
2293 Diag(Tok, diag::warn_cxx98_compat_generalized_initializer_lists);
2295 if (D.getCXXScopeSpec().isSet()) {
2297 Actions.ActOnCXXEnterDeclInitializer(getCurScope(), ThisDecl);
2300 ExprResult Init(ParseBraceInitializer());
2302 if (D.getCXXScopeSpec().isSet()) {
2303 Actions.ActOnCXXExitDeclInitializer(getCurScope(), ThisDecl);
2307 if (Init.isInvalid()) {
2308 Actions.ActOnInitializerError(ThisDecl);
2310 Actions.AddInitializerToDecl(ThisDecl, Init.get(), /*DirectInit=*/true);
2313 Actions.ActOnUninitializedDecl(ThisDecl);
2316 Actions.FinalizeDeclaration(ThisDecl);
2321 /// ParseSpecifierQualifierList
2322 /// specifier-qualifier-list:
2323 /// type-specifier specifier-qualifier-list[opt]
2324 /// type-qualifier specifier-qualifier-list[opt]
2325 /// [GNU] attributes specifier-qualifier-list[opt]
2327 void Parser::ParseSpecifierQualifierList(DeclSpec &DS, AccessSpecifier AS,
2328 DeclSpecContext DSC) {
2329 /// specifier-qualifier-list is a subset of declaration-specifiers. Just
2330 /// parse declaration-specifiers and complain about extra stuff.
2331 /// TODO: diagnose attribute-specifiers and alignment-specifiers.
2332 ParseDeclarationSpecifiers(DS, ParsedTemplateInfo(), AS, DSC);
2334 // Validate declspec for type-name.
2335 unsigned Specs = DS.getParsedSpecifiers();
2336 if (isTypeSpecifier(DSC) && !DS.hasTypeSpecifier()) {
2337 Diag(Tok, diag::err_expected_type);
2338 DS.SetTypeSpecError();
2339 } else if (Specs == DeclSpec::PQ_None && !DS.hasAttributes()) {
2340 Diag(Tok, diag::err_typename_requires_specqual);
2341 if (!DS.hasTypeSpecifier())
2342 DS.SetTypeSpecError();
2345 // Issue diagnostic and remove storage class if present.
2346 if (Specs & DeclSpec::PQ_StorageClassSpecifier) {
2347 if (DS.getStorageClassSpecLoc().isValid())
2348 Diag(DS.getStorageClassSpecLoc(),diag::err_typename_invalid_storageclass);
2350 Diag(DS.getThreadStorageClassSpecLoc(),
2351 diag::err_typename_invalid_storageclass);
2352 DS.ClearStorageClassSpecs();
2355 // Issue diagnostic and remove function specifier if present.
2356 if (Specs & DeclSpec::PQ_FunctionSpecifier) {
2357 if (DS.isInlineSpecified())
2358 Diag(DS.getInlineSpecLoc(), diag::err_typename_invalid_functionspec);
2359 if (DS.isVirtualSpecified())
2360 Diag(DS.getVirtualSpecLoc(), diag::err_typename_invalid_functionspec);
2361 if (DS.isExplicitSpecified())
2362 Diag(DS.getExplicitSpecLoc(), diag::err_typename_invalid_functionspec);
2363 DS.ClearFunctionSpecs();
2366 // Issue diagnostic and remove constexpr specfier if present.
2367 if (DS.isConstexprSpecified() && DSC != DSC_condition) {
2368 Diag(DS.getConstexprSpecLoc(), diag::err_typename_invalid_constexpr);
2369 DS.ClearConstexprSpec();
2373 /// isValidAfterIdentifierInDeclaratorAfterDeclSpec - Return true if the
2374 /// specified token is valid after the identifier in a declarator which
2375 /// immediately follows the declspec. For example, these things are valid:
2377 /// int x [ 4]; // direct-declarator
2378 /// int x ( int y); // direct-declarator
2379 /// int(int x ) // direct-declarator
2380 /// int x ; // simple-declaration
2381 /// int x = 17; // init-declarator-list
2382 /// int x , y; // init-declarator-list
2383 /// int x __asm__ ("foo"); // init-declarator-list
2384 /// int x : 4; // struct-declarator
2385 /// int x { 5}; // C++'0x unified initializers
2387 /// This is not, because 'x' does not immediately follow the declspec (though
2388 /// ')' happens to be valid anyway).
2391 static bool isValidAfterIdentifierInDeclarator(const Token &T) {
2392 return T.isOneOf(tok::l_square, tok::l_paren, tok::r_paren, tok::semi,
2393 tok::comma, tok::equal, tok::kw_asm, tok::l_brace,
2397 /// ParseImplicitInt - This method is called when we have an non-typename
2398 /// identifier in a declspec (which normally terminates the decl spec) when
2399 /// the declspec has no type specifier. In this case, the declspec is either
2400 /// malformed or is "implicit int" (in K&R and C89).
2402 /// This method handles diagnosing this prettily and returns false if the
2403 /// declspec is done being processed. If it recovers and thinks there may be
2404 /// other pieces of declspec after it, it returns true.
2406 bool Parser::ParseImplicitInt(DeclSpec &DS, CXXScopeSpec *SS,
2407 const ParsedTemplateInfo &TemplateInfo,
2408 AccessSpecifier AS, DeclSpecContext DSC,
2409 ParsedAttributesWithRange &Attrs) {
2410 assert(Tok.is(tok::identifier) && "should have identifier");
2412 SourceLocation Loc = Tok.getLocation();
2413 // If we see an identifier that is not a type name, we normally would
2414 // parse it as the identifer being declared. However, when a typename
2415 // is typo'd or the definition is not included, this will incorrectly
2416 // parse the typename as the identifier name and fall over misparsing
2417 // later parts of the diagnostic.
2419 // As such, we try to do some look-ahead in cases where this would
2420 // otherwise be an "implicit-int" case to see if this is invalid. For
2421 // example: "static foo_t x = 4;" In this case, if we parsed foo_t as
2422 // an identifier with implicit int, we'd get a parse error because the
2423 // next token is obviously invalid for a type. Parse these as a case
2424 // with an invalid type specifier.
2425 assert(!DS.hasTypeSpecifier() && "Type specifier checked above");
2427 // Since we know that this either implicit int (which is rare) or an
2428 // error, do lookahead to try to do better recovery. This never applies
2429 // within a type specifier. Outside of C++, we allow this even if the
2430 // language doesn't "officially" support implicit int -- we support
2431 // implicit int as an extension in C99 and C11.
2432 if (!isTypeSpecifier(DSC) && !getLangOpts().CPlusPlus &&
2433 isValidAfterIdentifierInDeclarator(NextToken())) {
2434 // If this token is valid for implicit int, e.g. "static x = 4", then
2435 // we just avoid eating the identifier, so it will be parsed as the
2436 // identifier in the declarator.
2440 if (getLangOpts().CPlusPlus &&
2441 DS.getStorageClassSpec() == DeclSpec::SCS_auto) {
2442 // Don't require a type specifier if we have the 'auto' storage class
2443 // specifier in C++98 -- we'll promote it to a type specifier.
2445 AnnotateScopeToken(*SS, /*IsNewAnnotation*/false);
2449 if (getLangOpts().CPlusPlus && (!SS || SS->isEmpty()) &&
2450 getLangOpts().MSVCCompat) {
2451 // Lookup of an unqualified type name has failed in MSVC compatibility mode.
2452 // Give Sema a chance to recover if we are in a template with dependent base
2454 if (ParsedType T = Actions.ActOnMSVCUnknownTypeName(
2455 *Tok.getIdentifierInfo(), Tok.getLocation(),
2456 DSC == DSC_template_type_arg)) {
2457 const char *PrevSpec;
2459 DS.SetTypeSpecType(DeclSpec::TST_typename, Loc, PrevSpec, DiagID, T,
2460 Actions.getASTContext().getPrintingPolicy());
2461 DS.SetRangeEnd(Tok.getLocation());
2467 // Otherwise, if we don't consume this token, we are going to emit an
2468 // error anyway. Try to recover from various common problems. Check
2469 // to see if this was a reference to a tag name without a tag specified.
2470 // This is a common problem in C (saying 'foo' instead of 'struct foo').
2472 // C++ doesn't need this, and isTagName doesn't take SS.
2473 if (SS == nullptr) {
2474 const char *TagName = nullptr, *FixitTagName = nullptr;
2475 tok::TokenKind TagKind = tok::unknown;
2477 switch (Actions.isTagName(*Tok.getIdentifierInfo(), getCurScope())) {
2479 case DeclSpec::TST_enum:
2480 TagName="enum" ; FixitTagName = "enum " ; TagKind=tok::kw_enum ;break;
2481 case DeclSpec::TST_union:
2482 TagName="union" ; FixitTagName = "union " ;TagKind=tok::kw_union ;break;
2483 case DeclSpec::TST_struct:
2484 TagName="struct"; FixitTagName = "struct ";TagKind=tok::kw_struct;break;
2485 case DeclSpec::TST_interface:
2486 TagName="__interface"; FixitTagName = "__interface ";
2487 TagKind=tok::kw___interface;break;
2488 case DeclSpec::TST_class:
2489 TagName="class" ; FixitTagName = "class " ;TagKind=tok::kw_class ;break;
2493 IdentifierInfo *TokenName = Tok.getIdentifierInfo();
2494 LookupResult R(Actions, TokenName, SourceLocation(),
2495 Sema::LookupOrdinaryName);
2497 Diag(Loc, diag::err_use_of_tag_name_without_tag)
2498 << TokenName << TagName << getLangOpts().CPlusPlus
2499 << FixItHint::CreateInsertion(Tok.getLocation(), FixitTagName);
2501 if (Actions.LookupParsedName(R, getCurScope(), SS)) {
2502 for (LookupResult::iterator I = R.begin(), IEnd = R.end();
2504 Diag((*I)->getLocation(), diag::note_decl_hiding_tag_type)
2505 << TokenName << TagName;
2508 // Parse this as a tag as if the missing tag were present.
2509 if (TagKind == tok::kw_enum)
2510 ParseEnumSpecifier(Loc, DS, TemplateInfo, AS, DSC_normal);
2512 ParseClassSpecifier(TagKind, Loc, DS, TemplateInfo, AS,
2513 /*EnteringContext*/ false, DSC_normal, Attrs);
2518 // Determine whether this identifier could plausibly be the name of something
2519 // being declared (with a missing type).
2520 if (!isTypeSpecifier(DSC) &&
2521 (!SS || DSC == DSC_top_level || DSC == DSC_class)) {
2522 // Look ahead to the next token to try to figure out what this declaration
2523 // was supposed to be.
2524 switch (NextToken().getKind()) {
2525 case tok::l_paren: {
2526 // static x(4); // 'x' is not a type
2527 // x(int n); // 'x' is not a type
2528 // x (*p)[]; // 'x' is a type
2530 // Since we're in an error case, we can afford to perform a tentative
2531 // parse to determine which case we're in.
2532 TentativeParsingAction PA(*this);
2534 TPResult TPR = TryParseDeclarator(/*mayBeAbstract*/false);
2537 if (TPR != TPResult::False) {
2538 // The identifier is followed by a parenthesized declarator.
2539 // It's supposed to be a type.
2543 // If we're in a context where we could be declaring a constructor,
2544 // check whether this is a constructor declaration with a bogus name.
2545 if (DSC == DSC_class || (DSC == DSC_top_level && SS)) {
2546 IdentifierInfo *II = Tok.getIdentifierInfo();
2547 if (Actions.isCurrentClassNameTypo(II, SS)) {
2548 Diag(Loc, diag::err_constructor_bad_name)
2549 << Tok.getIdentifierInfo() << II
2550 << FixItHint::CreateReplacement(Tok.getLocation(), II->getName());
2551 Tok.setIdentifierInfo(II);
2563 // This looks like a variable or function declaration. The type is
2564 // probably missing. We're done parsing decl-specifiers.
2566 AnnotateScopeToken(*SS, /*IsNewAnnotation*/false);
2570 // This is probably supposed to be a type. This includes cases like:
2572 // struct S { unsinged : 4; };
2577 // This is almost certainly an invalid type name. Let Sema emit a diagnostic
2578 // and attempt to recover.
2580 IdentifierInfo *II = Tok.getIdentifierInfo();
2581 bool IsTemplateName = getLangOpts().CPlusPlus && NextToken().is(tok::less);
2582 Actions.DiagnoseUnknownTypeName(II, Loc, getCurScope(), SS, T,
2585 // The action has suggested that the type T could be used. Set that as
2586 // the type in the declaration specifiers, consume the would-be type
2587 // name token, and we're done.
2588 const char *PrevSpec;
2590 DS.SetTypeSpecType(DeclSpec::TST_typename, Loc, PrevSpec, DiagID, T,
2591 Actions.getASTContext().getPrintingPolicy());
2592 DS.SetRangeEnd(Tok.getLocation());
2594 // There may be other declaration specifiers after this.
2596 } else if (II != Tok.getIdentifierInfo()) {
2597 // If no type was suggested, the correction is to a keyword
2598 Tok.setKind(II->getTokenID());
2599 // There may be other declaration specifiers after this.
2603 // Otherwise, the action had no suggestion for us. Mark this as an error.
2604 DS.SetTypeSpecError();
2605 DS.SetRangeEnd(Tok.getLocation());
2608 // Eat any following template arguments.
2609 if (IsTemplateName) {
2610 SourceLocation LAngle, RAngle;
2611 TemplateArgList Args;
2612 ParseTemplateIdAfterTemplateName(true, LAngle, Args, RAngle);
2615 // TODO: Could inject an invalid typedef decl in an enclosing scope to
2616 // avoid rippling error messages on subsequent uses of the same type,
2617 // could be useful if #include was forgotten.
2621 /// \brief Determine the declaration specifier context from the declarator
2624 /// \param Context the declarator context, which is one of the
2625 /// Declarator::TheContext enumerator values.
2626 Parser::DeclSpecContext
2627 Parser::getDeclSpecContextFromDeclaratorContext(unsigned Context) {
2628 if (Context == Declarator::MemberContext)
2630 if (Context == Declarator::FileContext)
2631 return DSC_top_level;
2632 if (Context == Declarator::TemplateParamContext)
2633 return DSC_template_param;
2634 if (Context == Declarator::TemplateTypeArgContext)
2635 return DSC_template_type_arg;
2636 if (Context == Declarator::TrailingReturnContext)
2637 return DSC_trailing;
2638 if (Context == Declarator::AliasDeclContext ||
2639 Context == Declarator::AliasTemplateContext)
2640 return DSC_alias_declaration;
2644 /// ParseAlignArgument - Parse the argument to an alignment-specifier.
2646 /// FIXME: Simply returns an alignof() expression if the argument is a
2647 /// type. Ideally, the type should be propagated directly into Sema.
2650 /// [C11] constant-expression
2651 /// [C++0x] type-id ...[opt]
2652 /// [C++0x] assignment-expression ...[opt]
2653 ExprResult Parser::ParseAlignArgument(SourceLocation Start,
2654 SourceLocation &EllipsisLoc) {
2656 if (isTypeIdInParens()) {
2657 SourceLocation TypeLoc = Tok.getLocation();
2658 ParsedType Ty = ParseTypeName().get();
2659 SourceRange TypeRange(Start, Tok.getLocation());
2660 ER = Actions.ActOnUnaryExprOrTypeTraitExpr(TypeLoc, UETT_AlignOf, true,
2661 Ty.getAsOpaquePtr(), TypeRange);
2663 ER = ParseConstantExpression();
2665 if (getLangOpts().CPlusPlus11)
2666 TryConsumeToken(tok::ellipsis, EllipsisLoc);
2671 /// ParseAlignmentSpecifier - Parse an alignment-specifier, and add the
2672 /// attribute to Attrs.
2674 /// alignment-specifier:
2675 /// [C11] '_Alignas' '(' type-id ')'
2676 /// [C11] '_Alignas' '(' constant-expression ')'
2677 /// [C++11] 'alignas' '(' type-id ...[opt] ')'
2678 /// [C++11] 'alignas' '(' assignment-expression ...[opt] ')'
2679 void Parser::ParseAlignmentSpecifier(ParsedAttributes &Attrs,
2680 SourceLocation *EndLoc) {
2681 assert(Tok.isOneOf(tok::kw_alignas, tok::kw__Alignas) &&
2682 "Not an alignment-specifier!");
2684 IdentifierInfo *KWName = Tok.getIdentifierInfo();
2685 SourceLocation KWLoc = ConsumeToken();
2687 BalancedDelimiterTracker T(*this, tok::l_paren);
2688 if (T.expectAndConsume())
2691 SourceLocation EllipsisLoc;
2692 ExprResult ArgExpr = ParseAlignArgument(T.getOpenLocation(), EllipsisLoc);
2693 if (ArgExpr.isInvalid()) {
2700 *EndLoc = T.getCloseLocation();
2702 ArgsVector ArgExprs;
2703 ArgExprs.push_back(ArgExpr.get());
2704 Attrs.addNew(KWName, KWLoc, nullptr, KWLoc, ArgExprs.data(), 1,
2705 AttributeList::AS_Keyword, EllipsisLoc);
2708 /// Determine whether we're looking at something that might be a declarator
2709 /// in a simple-declaration. If it can't possibly be a declarator, maybe
2710 /// diagnose a missing semicolon after a prior tag definition in the decl
2713 /// \return \c true if an error occurred and this can't be any kind of
2716 Parser::DiagnoseMissingSemiAfterTagDefinition(DeclSpec &DS, AccessSpecifier AS,
2717 DeclSpecContext DSContext,
2718 LateParsedAttrList *LateAttrs) {
2719 assert(DS.hasTagDefinition() && "shouldn't call this");
2721 bool EnteringContext = (DSContext == DSC_class || DSContext == DSC_top_level);
2723 if (getLangOpts().CPlusPlus &&
2724 Tok.isOneOf(tok::identifier, tok::coloncolon, tok::kw_decltype,
2725 tok::annot_template_id) &&
2726 TryAnnotateCXXScopeToken(EnteringContext)) {
2727 SkipMalformedDecl();
2731 bool HasScope = Tok.is(tok::annot_cxxscope);
2732 // Make a copy in case GetLookAheadToken invalidates the result of NextToken.
2733 Token AfterScope = HasScope ? NextToken() : Tok;
2735 // Determine whether the following tokens could possibly be a
2737 bool MightBeDeclarator = true;
2738 if (Tok.isOneOf(tok::kw_typename, tok::annot_typename)) {
2739 // A declarator-id can't start with 'typename'.
2740 MightBeDeclarator = false;
2741 } else if (AfterScope.is(tok::annot_template_id)) {
2742 // If we have a type expressed as a template-id, this cannot be a
2743 // declarator-id (such a type cannot be redeclared in a simple-declaration).
2744 TemplateIdAnnotation *Annot =
2745 static_cast<TemplateIdAnnotation *>(AfterScope.getAnnotationValue());
2746 if (Annot->Kind == TNK_Type_template)
2747 MightBeDeclarator = false;
2748 } else if (AfterScope.is(tok::identifier)) {
2749 const Token &Next = HasScope ? GetLookAheadToken(2) : NextToken();
2751 // These tokens cannot come after the declarator-id in a
2752 // simple-declaration, and are likely to come after a type-specifier.
2753 if (Next.isOneOf(tok::star, tok::amp, tok::ampamp, tok::identifier,
2754 tok::annot_cxxscope, tok::coloncolon)) {
2755 // Missing a semicolon.
2756 MightBeDeclarator = false;
2757 } else if (HasScope) {
2758 // If the declarator-id has a scope specifier, it must redeclare a
2759 // previously-declared entity. If that's a type (and this is not a
2760 // typedef), that's an error.
2762 Actions.RestoreNestedNameSpecifierAnnotation(
2763 Tok.getAnnotationValue(), Tok.getAnnotationRange(), SS);
2764 IdentifierInfo *Name = AfterScope.getIdentifierInfo();
2765 Sema::NameClassification Classification = Actions.ClassifyName(
2766 getCurScope(), SS, Name, AfterScope.getLocation(), Next,
2767 /*IsAddressOfOperand*/false);
2768 switch (Classification.getKind()) {
2769 case Sema::NC_Error:
2770 SkipMalformedDecl();
2773 case Sema::NC_Keyword:
2774 case Sema::NC_NestedNameSpecifier:
2775 llvm_unreachable("typo correction and nested name specifiers not "
2779 case Sema::NC_TypeTemplate:
2780 // Not a previously-declared non-type entity.
2781 MightBeDeclarator = false;
2784 case Sema::NC_Unknown:
2785 case Sema::NC_Expression:
2786 case Sema::NC_VarTemplate:
2787 case Sema::NC_FunctionTemplate:
2788 // Might be a redeclaration of a prior entity.
2794 if (MightBeDeclarator)
2797 const PrintingPolicy &PPol = Actions.getASTContext().getPrintingPolicy();
2798 Diag(PP.getLocForEndOfToken(DS.getRepAsDecl()->getLocEnd()),
2799 diag::err_expected_after)
2800 << DeclSpec::getSpecifierName(DS.getTypeSpecType(), PPol) << tok::semi;
2802 // Try to recover from the typo, by dropping the tag definition and parsing
2803 // the problematic tokens as a type.
2805 // FIXME: Split the DeclSpec into pieces for the standalone
2806 // declaration and pieces for the following declaration, instead
2807 // of assuming that all the other pieces attach to new declaration,
2808 // and call ParsedFreeStandingDeclSpec as appropriate.
2809 DS.ClearTypeSpecType();
2810 ParsedTemplateInfo NotATemplate;
2811 ParseDeclarationSpecifiers(DS, NotATemplate, AS, DSContext, LateAttrs);
2815 /// ParseDeclarationSpecifiers
2816 /// declaration-specifiers: [C99 6.7]
2817 /// storage-class-specifier declaration-specifiers[opt]
2818 /// type-specifier declaration-specifiers[opt]
2819 /// [C99] function-specifier declaration-specifiers[opt]
2820 /// [C11] alignment-specifier declaration-specifiers[opt]
2821 /// [GNU] attributes declaration-specifiers[opt]
2822 /// [Clang] '__module_private__' declaration-specifiers[opt]
2823 /// [ObjC1] '__kindof' declaration-specifiers[opt]
2825 /// storage-class-specifier: [C99 6.7.1]
2832 /// [C++11] 'thread_local'
2833 /// [C11] '_Thread_local'
2834 /// [GNU] '__thread'
2835 /// function-specifier: [C99 6.7.4]
2838 /// [C++] 'explicit'
2839 /// [OpenCL] '__kernel'
2840 /// 'friend': [C++ dcl.friend]
2841 /// 'constexpr': [C++0x dcl.constexpr]
2842 void Parser::ParseDeclarationSpecifiers(DeclSpec &DS,
2843 const ParsedTemplateInfo &TemplateInfo,
2845 DeclSpecContext DSContext,
2846 LateParsedAttrList *LateAttrs) {
2847 if (DS.getSourceRange().isInvalid()) {
2848 // Start the range at the current token but make the end of the range
2849 // invalid. This will make the entire range invalid unless we successfully
2851 DS.SetRangeStart(Tok.getLocation());
2852 DS.SetRangeEnd(SourceLocation());
2855 bool EnteringContext = (DSContext == DSC_class || DSContext == DSC_top_level);
2856 bool AttrsLastTime = false;
2857 ParsedAttributesWithRange attrs(AttrFactory);
2858 // We use Sema's policy to get bool macros right.
2859 PrintingPolicy Policy = Actions.getPrintingPolicy();
2861 bool isInvalid = false;
2862 bool isStorageClass = false;
2863 const char *PrevSpec = nullptr;
2864 unsigned DiagID = 0;
2866 // HACK: MSVC doesn't consider _Atomic to be a keyword and its STL
2867 // implementation for VS2013 uses _Atomic as an identifier for one of the
2868 // classes in <atomic>.
2870 // A typedef declaration containing _Atomic<...> is among the places where
2871 // the class is used. If we are currently parsing such a declaration, treat
2872 // the token as an identifier.
2873 if (getLangOpts().MSVCCompat && Tok.is(tok::kw__Atomic) &&
2874 DS.getStorageClassSpec() == clang::DeclSpec::SCS_typedef &&
2875 !DS.hasTypeSpecifier() && GetLookAheadToken(1).is(tok::less))
2876 Tok.setKind(tok::identifier);
2878 SourceLocation Loc = Tok.getLocation();
2880 switch (Tok.getKind()) {
2884 ProhibitAttributes(attrs);
2886 // Reject C++11 attributes that appertain to decl specifiers as
2887 // we don't support any C++11 attributes that appertain to decl
2888 // specifiers. This also conforms to what g++ 4.8 is doing.
2889 ProhibitCXX11Attributes(attrs, diag::err_attribute_not_type_attr);
2891 DS.takeAttributesFrom(attrs);
2894 // If this is not a declaration specifier token, we're done reading decl
2895 // specifiers. First verify that DeclSpec's are consistent.
2896 DS.Finish(Actions, Policy);
2900 case tok::kw_alignas:
2901 if (!getLangOpts().CPlusPlus11 || !isCXX11AttributeSpecifier())
2902 goto DoneWithDeclSpec;
2904 ProhibitAttributes(attrs);
2905 // FIXME: It would be good to recover by accepting the attributes,
2906 // but attempting to do that now would cause serious
2907 // madness in terms of diagnostics.
2909 attrs.Range = SourceRange();
2911 ParseCXX11Attributes(attrs);
2912 AttrsLastTime = true;
2915 case tok::code_completion: {
2916 Sema::ParserCompletionContext CCC = Sema::PCC_Namespace;
2917 if (DS.hasTypeSpecifier()) {
2918 bool AllowNonIdentifiers
2919 = (getCurScope()->getFlags() & (Scope::ControlScope |
2921 Scope::TemplateParamScope |
2922 Scope::FunctionPrototypeScope |
2923 Scope::AtCatchScope)) == 0;
2924 bool AllowNestedNameSpecifiers
2925 = DSContext == DSC_top_level ||
2926 (DSContext == DSC_class && DS.isFriendSpecified());
2928 Actions.CodeCompleteDeclSpec(getCurScope(), DS,
2929 AllowNonIdentifiers,
2930 AllowNestedNameSpecifiers);
2931 return cutOffParsing();
2934 if (getCurScope()->getFnParent() || getCurScope()->getBlockParent())
2935 CCC = Sema::PCC_LocalDeclarationSpecifiers;
2936 else if (TemplateInfo.Kind != ParsedTemplateInfo::NonTemplate)
2937 CCC = DSContext == DSC_class? Sema::PCC_MemberTemplate
2938 : Sema::PCC_Template;
2939 else if (DSContext == DSC_class)
2940 CCC = Sema::PCC_Class;
2941 else if (CurParsedObjCImpl)
2942 CCC = Sema::PCC_ObjCImplementation;
2944 Actions.CodeCompleteOrdinaryName(getCurScope(), CCC);
2945 return cutOffParsing();
2948 case tok::coloncolon: // ::foo::bar
2949 // C++ scope specifier. Annotate and loop, or bail out on error.
2950 if (TryAnnotateCXXScopeToken(EnteringContext)) {
2951 if (!DS.hasTypeSpecifier())
2952 DS.SetTypeSpecError();
2953 goto DoneWithDeclSpec;
2955 if (Tok.is(tok::coloncolon)) // ::new or ::delete
2956 goto DoneWithDeclSpec;
2959 case tok::annot_cxxscope: {
2960 if (DS.hasTypeSpecifier() || DS.isTypeAltiVecVector())
2961 goto DoneWithDeclSpec;
2964 Actions.RestoreNestedNameSpecifierAnnotation(Tok.getAnnotationValue(),
2965 Tok.getAnnotationRange(),
2968 // We are looking for a qualified typename.
2969 Token Next = NextToken();
2970 if (Next.is(tok::annot_template_id) &&
2971 static_cast<TemplateIdAnnotation *>(Next.getAnnotationValue())
2972 ->Kind == TNK_Type_template) {
2973 // We have a qualified template-id, e.g., N::A<int>
2975 // If this would be a valid constructor declaration with template
2976 // arguments, we will reject the attempt to form an invalid type-id
2977 // referring to the injected-class-name when we annotate the token,
2978 // per C++ [class.qual]p2.
2980 // To improve diagnostics for this case, parse the declaration as a
2981 // constructor (and reject the extra template arguments later).
2982 TemplateIdAnnotation *TemplateId = takeTemplateIdAnnotation(Next);
2983 if ((DSContext == DSC_top_level || DSContext == DSC_class) &&
2985 Actions.isCurrentClassName(*TemplateId->Name, getCurScope(), &SS) &&
2986 isConstructorDeclarator(/*Unqualified*/false)) {
2987 // The user meant this to be an out-of-line constructor
2988 // definition, but template arguments are not allowed
2989 // there. Just allow this as a constructor; we'll
2990 // complain about it later.
2991 goto DoneWithDeclSpec;
2994 DS.getTypeSpecScope() = SS;
2995 ConsumeAnnotationToken(); // The C++ scope.
2996 assert(Tok.is(tok::annot_template_id) &&
2997 "ParseOptionalCXXScopeSpecifier not working");
2998 AnnotateTemplateIdTokenAsType();
3002 if (Next.is(tok::annot_typename)) {
3003 DS.getTypeSpecScope() = SS;
3004 ConsumeAnnotationToken(); // The C++ scope.
3005 if (Tok.getAnnotationValue()) {
3006 ParsedType T = getTypeAnnotation(Tok);
3007 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_typename,
3008 Tok.getAnnotationEndLoc(),
3009 PrevSpec, DiagID, T, Policy);
3014 DS.SetTypeSpecError();
3015 DS.SetRangeEnd(Tok.getAnnotationEndLoc());
3016 ConsumeAnnotationToken(); // The typename
3019 if (Next.isNot(tok::identifier))
3020 goto DoneWithDeclSpec;
3022 // Check whether this is a constructor declaration. If we're in a
3023 // context where the identifier could be a class name, and it has the
3024 // shape of a constructor declaration, process it as one.
3025 if ((DSContext == DSC_top_level || DSContext == DSC_class) &&
3026 Actions.isCurrentClassName(*Next.getIdentifierInfo(), getCurScope(),
3028 isConstructorDeclarator(/*Unqualified*/ false))
3029 goto DoneWithDeclSpec;
3031 ParsedType TypeRep =
3032 Actions.getTypeName(*Next.getIdentifierInfo(), Next.getLocation(),
3033 getCurScope(), &SS, false, false, nullptr,
3034 /*IsCtorOrDtorName=*/false,
3035 /*WantNonTrivialSourceInfo=*/true,
3036 isClassTemplateDeductionContext(DSContext));
3038 // If the referenced identifier is not a type, then this declspec is
3039 // erroneous: We already checked about that it has no type specifier, and
3040 // C++ doesn't have implicit int. Diagnose it as a typo w.r.t. to the
3043 // Eat the scope spec so the identifier is current.
3044 ConsumeAnnotationToken();
3045 ParsedAttributesWithRange Attrs(AttrFactory);
3046 if (ParseImplicitInt(DS, &SS, TemplateInfo, AS, DSContext, Attrs)) {
3047 if (!Attrs.empty()) {
3048 AttrsLastTime = true;
3049 attrs.takeAllFrom(Attrs);
3053 goto DoneWithDeclSpec;
3056 DS.getTypeSpecScope() = SS;
3057 ConsumeAnnotationToken(); // The C++ scope.
3059 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_typename, Loc, PrevSpec,
3060 DiagID, TypeRep, Policy);
3064 DS.SetRangeEnd(Tok.getLocation());
3065 ConsumeToken(); // The typename.
3070 case tok::annot_typename: {
3071 // If we've previously seen a tag definition, we were almost surely
3072 // missing a semicolon after it.
3073 if (DS.hasTypeSpecifier() && DS.hasTagDefinition())
3074 goto DoneWithDeclSpec;
3076 if (Tok.getAnnotationValue()) {
3077 ParsedType T = getTypeAnnotation(Tok);
3078 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_typename, Loc, PrevSpec,
3081 DS.SetTypeSpecError();
3086 DS.SetRangeEnd(Tok.getAnnotationEndLoc());
3087 ConsumeAnnotationToken(); // The typename
3092 case tok::kw___is_signed:
3093 // GNU libstdc++ 4.4 uses __is_signed as an identifier, but Clang
3094 // typically treats it as a trait. If we see __is_signed as it appears
3095 // in libstdc++, e.g.,
3097 // static const bool __is_signed;
3099 // then treat __is_signed as an identifier rather than as a keyword.
3100 if (DS.getTypeSpecType() == TST_bool &&
3101 DS.getTypeQualifiers() == DeclSpec::TQ_const &&
3102 DS.getStorageClassSpec() == DeclSpec::SCS_static)
3103 TryKeywordIdentFallback(true);
3105 // We're done with the declaration-specifiers.
3106 goto DoneWithDeclSpec;
3109 case tok::kw___super:
3110 case tok::kw_decltype:
3111 case tok::identifier: {
3112 // This identifier can only be a typedef name if we haven't already seen
3113 // a type-specifier. Without this check we misparse:
3114 // typedef int X; struct Y { short X; }; as 'short int'.
3115 if (DS.hasTypeSpecifier())
3116 goto DoneWithDeclSpec;
3118 // If the token is an identifier named "__declspec" and Microsoft
3119 // extensions are not enabled, it is likely that there will be cascading
3120 // parse errors if this really is a __declspec attribute. Attempt to
3121 // recognize that scenario and recover gracefully.
3122 if (!getLangOpts().DeclSpecKeyword && Tok.is(tok::identifier) &&
3123 Tok.getIdentifierInfo()->getName().equals("__declspec")) {
3124 Diag(Loc, diag::err_ms_attributes_not_enabled);
3126 // The next token should be an open paren. If it is, eat the entire
3127 // attribute declaration and continue.
3128 if (NextToken().is(tok::l_paren)) {
3129 // Consume the __declspec identifier.
3132 // Eat the parens and everything between them.
3133 BalancedDelimiterTracker T(*this, tok::l_paren);
3134 if (T.consumeOpen()) {
3135 assert(false && "Not a left paren?");
3143 // In C++, check to see if this is a scope specifier like foo::bar::, if
3144 // so handle it as such. This is important for ctor parsing.
3145 if (getLangOpts().CPlusPlus) {
3146 if (TryAnnotateCXXScopeToken(EnteringContext)) {
3147 DS.SetTypeSpecError();
3148 goto DoneWithDeclSpec;
3150 if (!Tok.is(tok::identifier))
3154 // Check for need to substitute AltiVec keyword tokens.
3155 if (TryAltiVecToken(DS, Loc, PrevSpec, DiagID, isInvalid))
3158 // [AltiVec] 2.2: [If the 'vector' specifier is used] The syntax does not
3159 // allow the use of a typedef name as a type specifier.
3160 if (DS.isTypeAltiVecVector())
3161 goto DoneWithDeclSpec;
3163 if (DSContext == DSC_objc_method_result && isObjCInstancetype()) {
3164 ParsedType TypeRep = Actions.ActOnObjCInstanceType(Loc);
3166 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_typename, Loc, PrevSpec,
3167 DiagID, TypeRep, Policy);
3171 DS.SetRangeEnd(Loc);
3176 ParsedType TypeRep = Actions.getTypeName(
3177 *Tok.getIdentifierInfo(), Tok.getLocation(), getCurScope(), nullptr,
3178 false, false, nullptr, false, false,
3179 isClassTemplateDeductionContext(DSContext));
3181 // If this is not a typedef name, don't parse it as part of the declspec,
3182 // it must be an implicit int or an error.
3184 ParsedAttributesWithRange Attrs(AttrFactory);
3185 if (ParseImplicitInt(DS, nullptr, TemplateInfo, AS, DSContext, Attrs)) {
3186 if (!Attrs.empty()) {
3187 AttrsLastTime = true;
3188 attrs.takeAllFrom(Attrs);
3192 goto DoneWithDeclSpec;
3195 // If we're in a context where the identifier could be a class name,
3196 // check whether this is a constructor declaration.
3197 if (getLangOpts().CPlusPlus && DSContext == DSC_class &&
3198 Actions.isCurrentClassName(*Tok.getIdentifierInfo(), getCurScope()) &&
3199 isConstructorDeclarator(/*Unqualified*/true))
3200 goto DoneWithDeclSpec;
3202 // Likewise, if this is a context where the identifier could be a template
3203 // name, check whether this is a deduction guide declaration.
3204 if (getLangOpts().CPlusPlus1z &&
3205 (DSContext == DSC_class || DSContext == DSC_top_level) &&
3206 Actions.isDeductionGuideName(getCurScope(), *Tok.getIdentifierInfo(),
3207 Tok.getLocation()) &&
3208 isConstructorDeclarator(/*Unqualified*/ true,
3209 /*DeductionGuide*/ true))
3210 goto DoneWithDeclSpec;
3212 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_typename, Loc, PrevSpec,
3213 DiagID, TypeRep, Policy);
3217 DS.SetRangeEnd(Tok.getLocation());
3218 ConsumeToken(); // The identifier
3220 // Objective-C supports type arguments and protocol references
3221 // following an Objective-C object or object pointer
3222 // type. Handle either one of them.
3223 if (Tok.is(tok::less) && getLangOpts().ObjC1) {
3224 SourceLocation NewEndLoc;
3225 TypeResult NewTypeRep = parseObjCTypeArgsAndProtocolQualifiers(
3226 Loc, TypeRep, /*consumeLastToken=*/true,
3228 if (NewTypeRep.isUsable()) {
3229 DS.UpdateTypeRep(NewTypeRep.get());
3230 DS.SetRangeEnd(NewEndLoc);
3234 // Need to support trailing type qualifiers (e.g. "id<p> const").
3235 // If a type specifier follows, it will be diagnosed elsewhere.
3240 case tok::annot_template_id: {
3241 TemplateIdAnnotation *TemplateId = takeTemplateIdAnnotation(Tok);
3242 if (TemplateId->Kind != TNK_Type_template) {
3243 // This template-id does not refer to a type name, so we're
3244 // done with the type-specifiers.
3245 goto DoneWithDeclSpec;
3248 // If we're in a context where the template-id could be a
3249 // constructor name or specialization, check whether this is a
3250 // constructor declaration.
3251 if (getLangOpts().CPlusPlus && DSContext == DSC_class &&
3252 Actions.isCurrentClassName(*TemplateId->Name, getCurScope()) &&
3253 isConstructorDeclarator(TemplateId->SS.isEmpty()))
3254 goto DoneWithDeclSpec;
3256 // Turn the template-id annotation token into a type annotation
3257 // token, then try again to parse it as a type-specifier.
3258 AnnotateTemplateIdTokenAsType();
3262 // GNU attributes support.
3263 case tok::kw___attribute:
3264 ParseGNUAttributes(DS.getAttributes(), nullptr, LateAttrs);
3267 // Microsoft declspec support.
3268 case tok::kw___declspec:
3269 ParseMicrosoftDeclSpecs(DS.getAttributes());
3272 // Microsoft single token adornments.
3273 case tok::kw___forceinline: {
3274 isInvalid = DS.setFunctionSpecForceInline(Loc, PrevSpec, DiagID);
3275 IdentifierInfo *AttrName = Tok.getIdentifierInfo();
3276 SourceLocation AttrNameLoc = Tok.getLocation();
3277 DS.getAttributes().addNew(AttrName, AttrNameLoc, nullptr, AttrNameLoc,
3278 nullptr, 0, AttributeList::AS_Keyword);
3282 case tok::kw___unaligned:
3283 isInvalid = DS.SetTypeQual(DeclSpec::TQ_unaligned, Loc, PrevSpec, DiagID,
3287 case tok::kw___sptr:
3288 case tok::kw___uptr:
3289 case tok::kw___ptr64:
3290 case tok::kw___ptr32:
3292 case tok::kw___cdecl:
3293 case tok::kw___stdcall:
3294 case tok::kw___fastcall:
3295 case tok::kw___thiscall:
3296 case tok::kw___regcall:
3297 case tok::kw___vectorcall:
3298 ParseMicrosoftTypeAttributes(DS.getAttributes());
3301 // Borland single token adornments.
3302 case tok::kw___pascal:
3303 ParseBorlandTypeAttributes(DS.getAttributes());
3306 // OpenCL single token adornments.
3307 case tok::kw___kernel:
3308 ParseOpenCLKernelAttributes(DS.getAttributes());
3311 // Nullability type specifiers.
3312 case tok::kw__Nonnull:
3313 case tok::kw__Nullable:
3314 case tok::kw__Null_unspecified:
3315 ParseNullabilityTypeSpecifiers(DS.getAttributes());
3318 // Objective-C 'kindof' types.
3319 case tok::kw___kindof:
3320 DS.getAttributes().addNew(Tok.getIdentifierInfo(), Loc, nullptr, Loc,
3321 nullptr, 0, AttributeList::AS_Keyword);
3322 (void)ConsumeToken();
3325 // storage-class-specifier
3326 case tok::kw_typedef:
3327 isInvalid = DS.SetStorageClassSpec(Actions, DeclSpec::SCS_typedef, Loc,
3328 PrevSpec, DiagID, Policy);
3329 isStorageClass = true;
3331 case tok::kw_extern:
3332 if (DS.getThreadStorageClassSpec() == DeclSpec::TSCS___thread)
3333 Diag(Tok, diag::ext_thread_before) << "extern";
3334 isInvalid = DS.SetStorageClassSpec(Actions, DeclSpec::SCS_extern, Loc,
3335 PrevSpec, DiagID, Policy);
3336 isStorageClass = true;
3338 case tok::kw___private_extern__:
3339 isInvalid = DS.SetStorageClassSpec(Actions, DeclSpec::SCS_private_extern,
3340 Loc, PrevSpec, DiagID, Policy);
3341 isStorageClass = true;
3343 case tok::kw_static:
3344 if (DS.getThreadStorageClassSpec() == DeclSpec::TSCS___thread)
3345 Diag(Tok, diag::ext_thread_before) << "static";
3346 isInvalid = DS.SetStorageClassSpec(Actions, DeclSpec::SCS_static, Loc,
3347 PrevSpec, DiagID, Policy);
3348 isStorageClass = true;
3351 if (getLangOpts().CPlusPlus11) {
3352 if (isKnownToBeTypeSpecifier(GetLookAheadToken(1))) {
3353 isInvalid = DS.SetStorageClassSpec(Actions, DeclSpec::SCS_auto, Loc,
3354 PrevSpec, DiagID, Policy);
3356 Diag(Tok, diag::ext_auto_storage_class)
3357 << FixItHint::CreateRemoval(DS.getStorageClassSpecLoc());
3359 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_auto, Loc, PrevSpec,
3362 isInvalid = DS.SetStorageClassSpec(Actions, DeclSpec::SCS_auto, Loc,
3363 PrevSpec, DiagID, Policy);
3364 isStorageClass = true;
3366 case tok::kw___auto_type:
3367 Diag(Tok, diag::ext_auto_type);
3368 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_auto_type, Loc, PrevSpec,
3371 case tok::kw_register:
3372 isInvalid = DS.SetStorageClassSpec(Actions, DeclSpec::SCS_register, Loc,
3373 PrevSpec, DiagID, Policy);
3374 isStorageClass = true;
3376 case tok::kw_mutable:
3377 isInvalid = DS.SetStorageClassSpec(Actions, DeclSpec::SCS_mutable, Loc,
3378 PrevSpec, DiagID, Policy);
3379 isStorageClass = true;
3381 case tok::kw___thread:
3382 isInvalid = DS.SetStorageClassSpecThread(DeclSpec::TSCS___thread, Loc,
3384 isStorageClass = true;
3386 case tok::kw_thread_local:
3387 isInvalid = DS.SetStorageClassSpecThread(DeclSpec::TSCS_thread_local, Loc,
3390 case tok::kw__Thread_local:
3391 isInvalid = DS.SetStorageClassSpecThread(DeclSpec::TSCS__Thread_local,
3392 Loc, PrevSpec, DiagID);
3393 isStorageClass = true;
3396 // function-specifier
3397 case tok::kw_inline:
3398 isInvalid = DS.setFunctionSpecInline(Loc, PrevSpec, DiagID);
3400 case tok::kw_virtual:
3401 isInvalid = DS.setFunctionSpecVirtual(Loc, PrevSpec, DiagID);
3403 case tok::kw_explicit:
3404 isInvalid = DS.setFunctionSpecExplicit(Loc, PrevSpec, DiagID);
3406 case tok::kw__Noreturn:
3407 if (!getLangOpts().C11)
3408 Diag(Loc, diag::ext_c11_noreturn);
3409 isInvalid = DS.setFunctionSpecNoreturn(Loc, PrevSpec, DiagID);
3412 // alignment-specifier
3413 case tok::kw__Alignas:
3414 if (!getLangOpts().C11)
3415 Diag(Tok, diag::ext_c11_alignment) << Tok.getName();
3416 ParseAlignmentSpecifier(DS.getAttributes());
3420 case tok::kw_friend:
3421 if (DSContext == DSC_class)
3422 isInvalid = DS.SetFriendSpec(Loc, PrevSpec, DiagID);
3424 PrevSpec = ""; // not actually used by the diagnostic
3425 DiagID = diag::err_friend_invalid_in_context;
3431 case tok::kw___module_private__:
3432 isInvalid = DS.setModulePrivateSpec(Loc, PrevSpec, DiagID);
3436 case tok::kw_constexpr:
3437 isInvalid = DS.SetConstexprSpec(Loc, PrevSpec, DiagID);
3441 case tok::kw_concept:
3442 isInvalid = DS.SetConceptSpec(Loc, PrevSpec, DiagID);
3447 isInvalid = DS.SetTypeSpecWidth(DeclSpec::TSW_short, Loc, PrevSpec,
3451 if (DS.getTypeSpecWidth() != DeclSpec::TSW_long)
3452 isInvalid = DS.SetTypeSpecWidth(DeclSpec::TSW_long, Loc, PrevSpec,
3455 isInvalid = DS.SetTypeSpecWidth(DeclSpec::TSW_longlong, Loc, PrevSpec,
3458 case tok::kw___int64:
3459 isInvalid = DS.SetTypeSpecWidth(DeclSpec::TSW_longlong, Loc, PrevSpec,
3462 case tok::kw_signed:
3463 isInvalid = DS.SetTypeSpecSign(DeclSpec::TSS_signed, Loc, PrevSpec,
3466 case tok::kw_unsigned:
3467 isInvalid = DS.SetTypeSpecSign(DeclSpec::TSS_unsigned, Loc, PrevSpec,
3470 case tok::kw__Complex:
3471 isInvalid = DS.SetTypeSpecComplex(DeclSpec::TSC_complex, Loc, PrevSpec,
3474 case tok::kw__Imaginary:
3475 isInvalid = DS.SetTypeSpecComplex(DeclSpec::TSC_imaginary, Loc, PrevSpec,
3479 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_void, Loc, PrevSpec,
3483 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_char, Loc, PrevSpec,
3487 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_int, Loc, PrevSpec,
3490 case tok::kw___int128:
3491 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_int128, Loc, PrevSpec,
3495 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_half, Loc, PrevSpec,
3499 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_float, Loc, PrevSpec,
3502 case tok::kw_double:
3503 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_double, Loc, PrevSpec,
3506 case tok::kw___float128:
3507 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_float128, Loc, PrevSpec,
3510 case tok::kw_wchar_t:
3511 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_wchar, Loc, PrevSpec,
3514 case tok::kw_char16_t:
3515 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_char16, Loc, PrevSpec,
3518 case tok::kw_char32_t:
3519 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_char32, Loc, PrevSpec,
3524 if (Tok.is(tok::kw_bool) &&
3525 DS.getTypeSpecType() != DeclSpec::TST_unspecified &&
3526 DS.getStorageClassSpec() == DeclSpec::SCS_typedef) {
3527 PrevSpec = ""; // Not used by the diagnostic.
3528 DiagID = diag::err_bool_redeclaration;
3529 // For better error recovery.
3530 Tok.setKind(tok::identifier);
3533 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_bool, Loc, PrevSpec,
3537 case tok::kw__Decimal32:
3538 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_decimal32, Loc, PrevSpec,
3541 case tok::kw__Decimal64:
3542 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_decimal64, Loc, PrevSpec,
3545 case tok::kw__Decimal128:
3546 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_decimal128, Loc, PrevSpec,
3549 case tok::kw___vector:
3550 isInvalid = DS.SetTypeAltiVecVector(true, Loc, PrevSpec, DiagID, Policy);
3552 case tok::kw___pixel:
3553 isInvalid = DS.SetTypeAltiVecPixel(true, Loc, PrevSpec, DiagID, Policy);
3555 case tok::kw___bool:
3556 isInvalid = DS.SetTypeAltiVecBool(true, Loc, PrevSpec, DiagID, Policy);
3559 if (!getLangOpts().OpenCL || (getLangOpts().OpenCLVersion < 200)) {
3560 // OpenCL 2.0 defined this keyword. OpenCL 1.2 and earlier should
3561 // support the "pipe" word as identifier.
3562 Tok.getIdentifierInfo()->revertTokenIDToIdentifier();
3563 goto DoneWithDeclSpec;
3565 isInvalid = DS.SetTypePipe(true, Loc, PrevSpec, DiagID, Policy);
3567 #define GENERIC_IMAGE_TYPE(ImgType, Id) \
3568 case tok::kw_##ImgType##_t: \
3569 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_##ImgType##_t, Loc, PrevSpec, \
3572 #include "clang/Basic/OpenCLImageTypes.def"
3573 case tok::kw___unknown_anytype:
3574 isInvalid = DS.SetTypeSpecType(TST_unknown_anytype, Loc,
3575 PrevSpec, DiagID, Policy);
3580 case tok::kw_struct:
3581 case tok::kw___interface:
3582 case tok::kw_union: {
3583 tok::TokenKind Kind = Tok.getKind();
3586 // These are attributes following class specifiers.
3587 // To produce better diagnostic, we parse them when
3588 // parsing class specifier.
3589 ParsedAttributesWithRange Attributes(AttrFactory);
3590 ParseClassSpecifier(Kind, Loc, DS, TemplateInfo, AS,
3591 EnteringContext, DSContext, Attributes);
3593 // If there are attributes following class specifier,
3594 // take them over and handle them here.
3595 if (!Attributes.empty()) {
3596 AttrsLastTime = true;
3597 attrs.takeAllFrom(Attributes);
3605 ParseEnumSpecifier(Loc, DS, TemplateInfo, AS, DSContext);
3610 isInvalid = DS.SetTypeQual(DeclSpec::TQ_const, Loc, PrevSpec, DiagID,
3613 case tok::kw_volatile:
3614 isInvalid = DS.SetTypeQual(DeclSpec::TQ_volatile, Loc, PrevSpec, DiagID,
3617 case tok::kw_restrict:
3618 isInvalid = DS.SetTypeQual(DeclSpec::TQ_restrict, Loc, PrevSpec, DiagID,
3622 // C++ typename-specifier:
3623 case tok::kw_typename:
3624 if (TryAnnotateTypeOrScopeToken()) {
3625 DS.SetTypeSpecError();
3626 goto DoneWithDeclSpec;
3628 if (!Tok.is(tok::kw_typename))
3632 // GNU typeof support.
3633 case tok::kw_typeof:
3634 ParseTypeofSpecifier(DS);
3637 case tok::annot_decltype:
3638 ParseDecltypeSpecifier(DS);
3641 case tok::annot_pragma_pack:
3645 case tok::annot_pragma_ms_pragma:
3646 HandlePragmaMSPragma();
3649 case tok::annot_pragma_ms_vtordisp:
3650 HandlePragmaMSVtorDisp();
3653 case tok::annot_pragma_ms_pointers_to_members:
3654 HandlePragmaMSPointersToMembers();
3657 case tok::kw___underlying_type:
3658 ParseUnderlyingTypeSpecifier(DS);
3661 case tok::kw__Atomic:
3663 // If the _Atomic keyword is immediately followed by a left parenthesis,
3664 // it is interpreted as a type specifier (with a type name), not as a
3666 if (NextToken().is(tok::l_paren)) {
3667 ParseAtomicSpecifier(DS);
3670 isInvalid = DS.SetTypeQual(DeclSpec::TQ_atomic, Loc, PrevSpec, DiagID,
3674 // OpenCL qualifiers:
3675 case tok::kw___generic:
3676 // generic address space is introduced only in OpenCL v2.0
3677 // see OpenCL C Spec v2.0 s6.5.5
3678 if (Actions.getLangOpts().OpenCLVersion < 200) {
3679 DiagID = diag::err_opencl_unknown_type_specifier;
3680 PrevSpec = Tok.getIdentifierInfo()->getNameStart();
3685 case tok::kw___private:
3686 case tok::kw___global:
3687 case tok::kw___local:
3688 case tok::kw___constant:
3689 case tok::kw___read_only:
3690 case tok::kw___write_only:
3691 case tok::kw___read_write:
3692 ParseOpenCLQualifiers(DS.getAttributes());
3696 // GCC ObjC supports types like "<SomeProtocol>" as a synonym for
3697 // "id<SomeProtocol>". This is hopelessly old fashioned and dangerous,
3698 // but we support it.
3699 if (DS.hasTypeSpecifier() || !getLangOpts().ObjC1)
3700 goto DoneWithDeclSpec;
3702 SourceLocation StartLoc = Tok.getLocation();
3703 SourceLocation EndLoc;
3704 TypeResult Type = parseObjCProtocolQualifierType(EndLoc);
3705 if (Type.isUsable()) {
3706 if (DS.SetTypeSpecType(DeclSpec::TST_typename, StartLoc, StartLoc,
3707 PrevSpec, DiagID, Type.get(),
3708 Actions.getASTContext().getPrintingPolicy()))
3709 Diag(StartLoc, DiagID) << PrevSpec;
3711 DS.SetRangeEnd(EndLoc);
3713 DS.SetTypeSpecError();
3716 // Need to support trailing type qualifiers (e.g. "id<p> const").
3717 // If a type specifier follows, it will be diagnosed elsewhere.
3720 // If the specifier wasn't legal, issue a diagnostic.
3722 assert(PrevSpec && "Method did not return previous specifier!");
3725 if (DiagID == diag::ext_duplicate_declspec)
3727 << PrevSpec << FixItHint::CreateRemoval(Tok.getLocation());
3728 else if (DiagID == diag::err_opencl_unknown_type_specifier) {
3729 const int OpenCLVer = getLangOpts().OpenCLVersion;
3730 std::string VerSpec = llvm::to_string(OpenCLVer / 100) +
3732 llvm::to_string((OpenCLVer % 100) / 10);
3733 Diag(Tok, DiagID) << VerSpec << PrevSpec << isStorageClass;
3735 Diag(Tok, DiagID) << PrevSpec;
3738 DS.SetRangeEnd(Tok.getLocation());
3739 if (DiagID != diag::err_bool_redeclaration)
3742 AttrsLastTime = false;
3746 /// ParseStructDeclaration - Parse a struct declaration without the terminating
3749 /// struct-declaration:
3750 /// specifier-qualifier-list struct-declarator-list
3751 /// [GNU] __extension__ struct-declaration
3752 /// [GNU] specifier-qualifier-list
3753 /// struct-declarator-list:
3754 /// struct-declarator
3755 /// struct-declarator-list ',' struct-declarator
3756 /// [GNU] struct-declarator-list ',' attributes[opt] struct-declarator
3757 /// struct-declarator:
3759 /// [GNU] declarator attributes[opt]
3760 /// declarator[opt] ':' constant-expression
3761 /// [GNU] declarator[opt] ':' constant-expression attributes[opt]
3763 void Parser::ParseStructDeclaration(
3764 ParsingDeclSpec &DS,
3765 llvm::function_ref<void(ParsingFieldDeclarator &)> FieldsCallback) {
3767 if (Tok.is(tok::kw___extension__)) {
3768 // __extension__ silences extension warnings in the subexpression.
3769 ExtensionRAIIObject O(Diags); // Use RAII to do this.
3771 return ParseStructDeclaration(DS, FieldsCallback);
3774 // Parse the common specifier-qualifiers-list piece.
3775 ParseSpecifierQualifierList(DS);
3777 // If there are no declarators, this is a free-standing declaration
3778 // specifier. Let the actions module cope with it.
3779 if (Tok.is(tok::semi)) {
3780 RecordDecl *AnonRecord = nullptr;
3781 Decl *TheDecl = Actions.ParsedFreeStandingDeclSpec(getCurScope(), AS_none,
3783 assert(!AnonRecord && "Did not expect anonymous struct or union here");
3784 DS.complete(TheDecl);
3788 // Read struct-declarators until we find the semicolon.
3789 bool FirstDeclarator = true;
3790 SourceLocation CommaLoc;
3792 ParsingFieldDeclarator DeclaratorInfo(*this, DS);
3793 DeclaratorInfo.D.setCommaLoc(CommaLoc);
3795 // Attributes are only allowed here on successive declarators.
3796 if (!FirstDeclarator)
3797 MaybeParseGNUAttributes(DeclaratorInfo.D);
3799 /// struct-declarator: declarator
3800 /// struct-declarator: declarator[opt] ':' constant-expression
3801 if (Tok.isNot(tok::colon)) {
3802 // Don't parse FOO:BAR as if it were a typo for FOO::BAR.
3803 ColonProtectionRAIIObject X(*this);
3804 ParseDeclarator(DeclaratorInfo.D);
3806 DeclaratorInfo.D.SetIdentifier(nullptr, Tok.getLocation());
3808 if (TryConsumeToken(tok::colon)) {
3809 ExprResult Res(ParseConstantExpression());
3810 if (Res.isInvalid())
3811 SkipUntil(tok::semi, StopBeforeMatch);
3813 DeclaratorInfo.BitfieldSize = Res.get();
3816 // If attributes exist after the declarator, parse them.
3817 MaybeParseGNUAttributes(DeclaratorInfo.D);
3819 // We're done with this declarator; invoke the callback.
3820 FieldsCallback(DeclaratorInfo);
3822 // If we don't have a comma, it is either the end of the list (a ';')
3823 // or an error, bail out.
3824 if (!TryConsumeToken(tok::comma, CommaLoc))
3827 FirstDeclarator = false;
3831 /// ParseStructUnionBody
3832 /// struct-contents:
3833 /// struct-declaration-list
3835 /// [GNU] "struct-declaration-list" without terminatoring ';'
3836 /// struct-declaration-list:
3837 /// struct-declaration
3838 /// struct-declaration-list struct-declaration
3839 /// [OBC] '@' 'defs' '(' class-name ')'
3841 void Parser::ParseStructUnionBody(SourceLocation RecordLoc,
3842 unsigned TagType, Decl *TagDecl) {
3843 PrettyDeclStackTraceEntry CrashInfo(Actions, TagDecl, RecordLoc,
3844 "parsing struct/union body");
3845 assert(!getLangOpts().CPlusPlus && "C++ declarations not supported");
3847 BalancedDelimiterTracker T(*this, tok::l_brace);
3848 if (T.consumeOpen())
3851 ParseScope StructScope(this, Scope::ClassScope|Scope::DeclScope);
3852 Actions.ActOnTagStartDefinition(getCurScope(), TagDecl);
3854 SmallVector<Decl *, 32> FieldDecls;
3856 // While we still have something to read, read the declarations in the struct.
3857 while (!tryParseMisplacedModuleImport() && Tok.isNot(tok::r_brace) &&
3858 Tok.isNot(tok::eof)) {
3859 // Each iteration of this loop reads one struct-declaration.
3861 // Check for extraneous top-level semicolon.
3862 if (Tok.is(tok::semi)) {
3863 ConsumeExtraSemi(InsideStruct, TagType);
3867 // Parse _Static_assert declaration.
3868 if (Tok.is(tok::kw__Static_assert)) {
3869 SourceLocation DeclEnd;
3870 ParseStaticAssertDeclaration(DeclEnd);
3874 if (Tok.is(tok::annot_pragma_pack)) {
3879 if (Tok.is(tok::annot_pragma_align)) {
3880 HandlePragmaAlign();
3884 if (Tok.is(tok::annot_pragma_openmp)) {
3885 // Result can be ignored, because it must be always empty.
3886 AccessSpecifier AS = AS_none;
3887 ParsedAttributesWithRange Attrs(AttrFactory);
3888 (void)ParseOpenMPDeclarativeDirectiveWithExtDecl(AS, Attrs);
3892 if (!Tok.is(tok::at)) {
3893 auto CFieldCallback = [&](ParsingFieldDeclarator &FD) {
3894 // Install the declarator into the current TagDecl.
3896 Actions.ActOnField(getCurScope(), TagDecl,
3897 FD.D.getDeclSpec().getSourceRange().getBegin(),
3898 FD.D, FD.BitfieldSize);
3899 FieldDecls.push_back(Field);
3903 // Parse all the comma separated declarators.
3904 ParsingDeclSpec DS(*this);
3905 ParseStructDeclaration(DS, CFieldCallback);
3906 } else { // Handle @defs
3908 if (!Tok.isObjCAtKeyword(tok::objc_defs)) {
3909 Diag(Tok, diag::err_unexpected_at);
3910 SkipUntil(tok::semi);
3914 ExpectAndConsume(tok::l_paren);
3915 if (!Tok.is(tok::identifier)) {
3916 Diag(Tok, diag::err_expected) << tok::identifier;
3917 SkipUntil(tok::semi);
3920 SmallVector<Decl *, 16> Fields;
3921 Actions.ActOnDefs(getCurScope(), TagDecl, Tok.getLocation(),
3922 Tok.getIdentifierInfo(), Fields);
3923 FieldDecls.insert(FieldDecls.end(), Fields.begin(), Fields.end());
3925 ExpectAndConsume(tok::r_paren);
3928 if (TryConsumeToken(tok::semi))
3931 if (Tok.is(tok::r_brace)) {
3932 ExpectAndConsume(tok::semi, diag::ext_expected_semi_decl_list);
3936 ExpectAndConsume(tok::semi, diag::err_expected_semi_decl_list);
3937 // Skip to end of block or statement to avoid ext-warning on extra ';'.
3938 SkipUntil(tok::r_brace, StopAtSemi | StopBeforeMatch);
3939 // If we stopped at a ';', eat it.
3940 TryConsumeToken(tok::semi);
3945 ParsedAttributes attrs(AttrFactory);
3946 // If attributes exist after struct contents, parse them.
3947 MaybeParseGNUAttributes(attrs);
3949 Actions.ActOnFields(getCurScope(),
3950 RecordLoc, TagDecl, FieldDecls,
3951 T.getOpenLocation(), T.getCloseLocation(),
3954 Actions.ActOnTagFinishDefinition(getCurScope(), TagDecl, T.getRange());
3957 /// ParseEnumSpecifier
3958 /// enum-specifier: [C99 6.7.2.2]
3959 /// 'enum' identifier[opt] '{' enumerator-list '}'
3960 ///[C99/C++]'enum' identifier[opt] '{' enumerator-list ',' '}'
3961 /// [GNU] 'enum' attributes[opt] identifier[opt] '{' enumerator-list ',' [opt]
3962 /// '}' attributes[opt]
3963 /// [MS] 'enum' __declspec[opt] identifier[opt] '{' enumerator-list ',' [opt]
3965 /// 'enum' identifier
3966 /// [GNU] 'enum' attributes[opt] identifier
3968 /// [C++11] enum-head '{' enumerator-list[opt] '}'
3969 /// [C++11] enum-head '{' enumerator-list ',' '}'
3971 /// enum-head: [C++11]
3972 /// enum-key attribute-specifier-seq[opt] identifier[opt] enum-base[opt]
3973 /// enum-key attribute-specifier-seq[opt] nested-name-specifier
3974 /// identifier enum-base[opt]
3976 /// enum-key: [C++11]
3981 /// enum-base: [C++11]
3982 /// ':' type-specifier-seq
3984 /// [C++] elaborated-type-specifier:
3985 /// [C++] 'enum' '::'[opt] nested-name-specifier[opt] identifier
3987 void Parser::ParseEnumSpecifier(SourceLocation StartLoc, DeclSpec &DS,
3988 const ParsedTemplateInfo &TemplateInfo,
3989 AccessSpecifier AS, DeclSpecContext DSC) {
3990 // Parse the tag portion of this.
3991 if (Tok.is(tok::code_completion)) {
3992 // Code completion for an enum name.
3993 Actions.CodeCompleteTag(getCurScope(), DeclSpec::TST_enum);
3994 return cutOffParsing();
3997 // If attributes exist after tag, parse them.
3998 ParsedAttributesWithRange attrs(AttrFactory);
3999 MaybeParseGNUAttributes(attrs);
4000 MaybeParseCXX11Attributes(attrs);
4001 MaybeParseMicrosoftDeclSpecs(attrs);
4003 SourceLocation ScopedEnumKWLoc;
4004 bool IsScopedUsingClassTag = false;
4006 // In C++11, recognize 'enum class' and 'enum struct'.
4007 if (Tok.isOneOf(tok::kw_class, tok::kw_struct)) {
4008 Diag(Tok, getLangOpts().CPlusPlus11 ? diag::warn_cxx98_compat_scoped_enum
4009 : diag::ext_scoped_enum);
4010 IsScopedUsingClassTag = Tok.is(tok::kw_class);
4011 ScopedEnumKWLoc = ConsumeToken();
4013 // Attributes are not allowed between these keywords. Diagnose,
4014 // but then just treat them like they appeared in the right place.
4015 ProhibitAttributes(attrs);
4017 // They are allowed afterwards, though.
4018 MaybeParseGNUAttributes(attrs);
4019 MaybeParseCXX11Attributes(attrs);
4020 MaybeParseMicrosoftDeclSpecs(attrs);
4023 // C++11 [temp.explicit]p12:
4024 // The usual access controls do not apply to names used to specify
4025 // explicit instantiations.
4026 // We extend this to also cover explicit specializations. Note that
4027 // we don't suppress if this turns out to be an elaborated type
4029 bool shouldDelayDiagsInTag =
4030 (TemplateInfo.Kind == ParsedTemplateInfo::ExplicitInstantiation ||
4031 TemplateInfo.Kind == ParsedTemplateInfo::ExplicitSpecialization);
4032 SuppressAccessChecks diagsFromTag(*this, shouldDelayDiagsInTag);
4034 // Enum definitions should not be parsed in a trailing-return-type.
4035 bool AllowDeclaration = DSC != DSC_trailing;
4037 bool AllowFixedUnderlyingType = AllowDeclaration &&
4038 (getLangOpts().CPlusPlus11 || getLangOpts().MicrosoftExt ||
4039 getLangOpts().ObjC2);
4041 CXXScopeSpec &SS = DS.getTypeSpecScope();
4042 if (getLangOpts().CPlusPlus) {
4043 // "enum foo : bar;" is not a potential typo for "enum foo::bar;"
4044 // if a fixed underlying type is allowed.
4045 ColonProtectionRAIIObject X(*this, AllowFixedUnderlyingType);
4048 if (ParseOptionalCXXScopeSpecifier(Spec, nullptr,
4049 /*EnteringContext=*/true))
4052 if (Spec.isSet() && Tok.isNot(tok::identifier)) {
4053 Diag(Tok, diag::err_expected) << tok::identifier;
4054 if (Tok.isNot(tok::l_brace)) {
4055 // Has no name and is not a definition.
4056 // Skip the rest of this declarator, up until the comma or semicolon.
4057 SkipUntil(tok::comma, StopAtSemi);
4065 // Must have either 'enum name' or 'enum {...}'.
4066 if (Tok.isNot(tok::identifier) && Tok.isNot(tok::l_brace) &&
4067 !(AllowFixedUnderlyingType && Tok.is(tok::colon))) {
4068 Diag(Tok, diag::err_expected_either) << tok::identifier << tok::l_brace;
4070 // Skip the rest of this declarator, up until the comma or semicolon.
4071 SkipUntil(tok::comma, StopAtSemi);
4075 // If an identifier is present, consume and remember it.
4076 IdentifierInfo *Name = nullptr;
4077 SourceLocation NameLoc;
4078 if (Tok.is(tok::identifier)) {
4079 Name = Tok.getIdentifierInfo();
4080 NameLoc = ConsumeToken();
4083 if (!Name && ScopedEnumKWLoc.isValid()) {
4084 // C++0x 7.2p2: The optional identifier shall not be omitted in the
4085 // declaration of a scoped enumeration.
4086 Diag(Tok, diag::err_scoped_enum_missing_identifier);
4087 ScopedEnumKWLoc = SourceLocation();
4088 IsScopedUsingClassTag = false;
4091 // Okay, end the suppression area. We'll decide whether to emit the
4092 // diagnostics in a second.
4093 if (shouldDelayDiagsInTag)
4094 diagsFromTag.done();
4096 TypeResult BaseType;
4098 // Parse the fixed underlying type.
4099 bool CanBeBitfield = getCurScope()->getFlags() & Scope::ClassScope;
4100 if (AllowFixedUnderlyingType && Tok.is(tok::colon)) {
4101 bool PossibleBitfield = false;
4102 if (CanBeBitfield) {
4103 // If we're in class scope, this can either be an enum declaration with
4104 // an underlying type, or a declaration of a bitfield member. We try to
4105 // use a simple disambiguation scheme first to catch the common cases
4106 // (integer literal, sizeof); if it's still ambiguous, we then consider
4107 // anything that's a simple-type-specifier followed by '(' as an
4108 // expression. This suffices because function types are not valid
4109 // underlying types anyway.
4110 EnterExpressionEvaluationContext Unevaluated(
4111 Actions, Sema::ExpressionEvaluationContext::ConstantEvaluated);
4112 TPResult TPR = isExpressionOrTypeSpecifierSimple(NextToken().getKind());
4113 // If the next token starts an expression, we know we're parsing a
4114 // bit-field. This is the common case.
4115 if (TPR == TPResult::True)
4116 PossibleBitfield = true;
4117 // If the next token starts a type-specifier-seq, it may be either a
4118 // a fixed underlying type or the start of a function-style cast in C++;
4119 // lookahead one more token to see if it's obvious that we have a
4120 // fixed underlying type.
4121 else if (TPR == TPResult::False &&
4122 GetLookAheadToken(2).getKind() == tok::semi) {
4126 // We have the start of a type-specifier-seq, so we have to perform
4127 // tentative parsing to determine whether we have an expression or a
4129 TentativeParsingAction TPA(*this);
4134 // If we see a type specifier followed by an open-brace, we have an
4135 // ambiguity between an underlying type and a C++11 braced
4136 // function-style cast. Resolve this by always treating it as an
4138 // FIXME: The standard is not entirely clear on how to disambiguate in
4140 if ((getLangOpts().CPlusPlus &&
4141 isCXXDeclarationSpecifier(TPResult::True) != TPResult::True) ||
4142 (!getLangOpts().CPlusPlus && !isDeclarationSpecifier(true))) {
4143 // We'll parse this as a bitfield later.
4144 PossibleBitfield = true;
4147 // We have a type-specifier-seq.
4156 if (!PossibleBitfield) {
4158 BaseType = ParseTypeName(&Range);
4160 if (getLangOpts().CPlusPlus11) {
4161 Diag(StartLoc, diag::warn_cxx98_compat_enum_fixed_underlying_type);
4162 } else if (!getLangOpts().ObjC2) {
4163 if (getLangOpts().CPlusPlus)
4164 Diag(StartLoc, diag::ext_cxx11_enum_fixed_underlying_type) << Range;
4166 Diag(StartLoc, diag::ext_c_enum_fixed_underlying_type) << Range;
4171 // There are four options here. If we have 'friend enum foo;' then this is a
4172 // friend declaration, and cannot have an accompanying definition. If we have
4173 // 'enum foo;', then this is a forward declaration. If we have
4174 // 'enum foo {...' then this is a definition. Otherwise we have something
4175 // like 'enum foo xyz', a reference.
4177 // This is needed to handle stuff like this right (C99 6.7.2.3p11):
4178 // enum foo {..}; void bar() { enum foo; } <- new foo in bar.
4179 // enum foo {..}; void bar() { enum foo x; } <- use of old foo.
4181 Sema::TagUseKind TUK;
4182 if (!AllowDeclaration) {
4183 TUK = Sema::TUK_Reference;
4184 } else if (Tok.is(tok::l_brace)) {
4185 if (DS.isFriendSpecified()) {
4186 Diag(Tok.getLocation(), diag::err_friend_decl_defines_type)
4187 << SourceRange(DS.getFriendSpecLoc());
4189 SkipUntil(tok::r_brace, StopAtSemi);
4190 TUK = Sema::TUK_Friend;
4192 TUK = Sema::TUK_Definition;
4194 } else if (!isTypeSpecifier(DSC) &&
4195 (Tok.is(tok::semi) ||
4196 (Tok.isAtStartOfLine() &&
4197 !isValidAfterTypeSpecifier(CanBeBitfield)))) {
4198 TUK = DS.isFriendSpecified() ? Sema::TUK_Friend : Sema::TUK_Declaration;
4199 if (Tok.isNot(tok::semi)) {
4200 // A semicolon was missing after this declaration. Diagnose and recover.
4201 ExpectAndConsume(tok::semi, diag::err_expected_after, "enum");
4203 Tok.setKind(tok::semi);
4206 TUK = Sema::TUK_Reference;
4209 // If this is an elaborated type specifier, and we delayed
4210 // diagnostics before, just merge them into the current pool.
4211 if (TUK == Sema::TUK_Reference && shouldDelayDiagsInTag) {
4212 diagsFromTag.redelay();
4215 MultiTemplateParamsArg TParams;
4216 if (TemplateInfo.Kind != ParsedTemplateInfo::NonTemplate &&
4217 TUK != Sema::TUK_Reference) {
4218 if (!getLangOpts().CPlusPlus11 || !SS.isSet()) {
4219 // Skip the rest of this declarator, up until the comma or semicolon.
4220 Diag(Tok, diag::err_enum_template);
4221 SkipUntil(tok::comma, StopAtSemi);
4225 if (TemplateInfo.Kind == ParsedTemplateInfo::ExplicitInstantiation) {
4226 // Enumerations can't be explicitly instantiated.
4227 DS.SetTypeSpecError();
4228 Diag(StartLoc, diag::err_explicit_instantiation_enum);
4232 assert(TemplateInfo.TemplateParams && "no template parameters");
4233 TParams = MultiTemplateParamsArg(TemplateInfo.TemplateParams->data(),
4234 TemplateInfo.TemplateParams->size());
4237 if (TUK == Sema::TUK_Reference)
4238 ProhibitAttributes(attrs);
4240 if (!Name && TUK != Sema::TUK_Definition) {
4241 Diag(Tok, diag::err_enumerator_unnamed_no_def);
4243 // Skip the rest of this declarator, up until the comma or semicolon.
4244 SkipUntil(tok::comma, StopAtSemi);
4248 stripTypeAttributesOffDeclSpec(attrs, DS, TUK);
4250 Sema::SkipBodyInfo SkipBody;
4251 if (!Name && TUK == Sema::TUK_Definition && Tok.is(tok::l_brace) &&
4252 NextToken().is(tok::identifier))
4253 SkipBody = Actions.shouldSkipAnonEnumBody(getCurScope(),
4254 NextToken().getIdentifierInfo(),
4255 NextToken().getLocation());
4258 bool IsDependent = false;
4259 const char *PrevSpec = nullptr;
4261 Decl *TagDecl = Actions.ActOnTag(getCurScope(), DeclSpec::TST_enum, TUK,
4262 StartLoc, SS, Name, NameLoc, attrs.getList(),
4263 AS, DS.getModulePrivateSpecLoc(), TParams,
4264 Owned, IsDependent, ScopedEnumKWLoc,
4265 IsScopedUsingClassTag, BaseType,
4266 DSC == DSC_type_specifier,
4267 DSC == DSC_template_param ||
4268 DSC == DSC_template_type_arg, &SkipBody);
4270 if (SkipBody.ShouldSkip) {
4271 assert(TUK == Sema::TUK_Definition && "can only skip a definition");
4273 BalancedDelimiterTracker T(*this, tok::l_brace);
4277 if (DS.SetTypeSpecType(DeclSpec::TST_enum, StartLoc,
4278 NameLoc.isValid() ? NameLoc : StartLoc,
4279 PrevSpec, DiagID, TagDecl, Owned,
4280 Actions.getASTContext().getPrintingPolicy()))
4281 Diag(StartLoc, DiagID) << PrevSpec;
4286 // This enum has a dependent nested-name-specifier. Handle it as a
4289 DS.SetTypeSpecError();
4290 Diag(Tok, diag::err_expected_type_name_after_typename);
4294 TypeResult Type = Actions.ActOnDependentTag(
4295 getCurScope(), DeclSpec::TST_enum, TUK, SS, Name, StartLoc, NameLoc);
4296 if (Type.isInvalid()) {
4297 DS.SetTypeSpecError();
4301 if (DS.SetTypeSpecType(DeclSpec::TST_typename, StartLoc,
4302 NameLoc.isValid() ? NameLoc : StartLoc,
4303 PrevSpec, DiagID, Type.get(),
4304 Actions.getASTContext().getPrintingPolicy()))
4305 Diag(StartLoc, DiagID) << PrevSpec;
4311 // The action failed to produce an enumeration tag. If this is a
4312 // definition, consume the entire definition.
4313 if (Tok.is(tok::l_brace) && TUK != Sema::TUK_Reference) {
4315 SkipUntil(tok::r_brace, StopAtSemi);
4318 DS.SetTypeSpecError();
4322 if (Tok.is(tok::l_brace) && TUK != Sema::TUK_Reference) {
4323 Decl *D = SkipBody.CheckSameAsPrevious ? SkipBody.New : TagDecl;
4324 ParseEnumBody(StartLoc, D);
4325 if (SkipBody.CheckSameAsPrevious &&
4326 !Actions.ActOnDuplicateDefinition(DS, TagDecl, SkipBody)) {
4327 DS.SetTypeSpecError();
4332 if (DS.SetTypeSpecType(DeclSpec::TST_enum, StartLoc,
4333 NameLoc.isValid() ? NameLoc : StartLoc,
4334 PrevSpec, DiagID, TagDecl, Owned,
4335 Actions.getASTContext().getPrintingPolicy()))
4336 Diag(StartLoc, DiagID) << PrevSpec;
4339 /// ParseEnumBody - Parse a {} enclosed enumerator-list.
4340 /// enumerator-list:
4342 /// enumerator-list ',' enumerator
4344 /// enumeration-constant attributes[opt]
4345 /// enumeration-constant attributes[opt] '=' constant-expression
4346 /// enumeration-constant:
4349 void Parser::ParseEnumBody(SourceLocation StartLoc, Decl *EnumDecl) {
4350 // Enter the scope of the enum body and start the definition.
4351 ParseScope EnumScope(this, Scope::DeclScope | Scope::EnumScope);
4352 Actions.ActOnTagStartDefinition(getCurScope(), EnumDecl);
4354 BalancedDelimiterTracker T(*this, tok::l_brace);
4357 // C does not allow an empty enumerator-list, C++ does [dcl.enum].
4358 if (Tok.is(tok::r_brace) && !getLangOpts().CPlusPlus)
4359 Diag(Tok, diag::err_empty_enum);
4361 SmallVector<Decl *, 32> EnumConstantDecls;
4362 SmallVector<SuppressAccessChecks, 32> EnumAvailabilityDiags;
4364 Decl *LastEnumConstDecl = nullptr;
4366 // Parse the enumerator-list.
4367 while (Tok.isNot(tok::r_brace)) {
4368 // Parse enumerator. If failed, try skipping till the start of the next
4369 // enumerator definition.
4370 if (Tok.isNot(tok::identifier)) {
4371 Diag(Tok.getLocation(), diag::err_expected) << tok::identifier;
4372 if (SkipUntil(tok::comma, tok::r_brace, StopBeforeMatch) &&
4373 TryConsumeToken(tok::comma))
4377 IdentifierInfo *Ident = Tok.getIdentifierInfo();
4378 SourceLocation IdentLoc = ConsumeToken();
4380 // If attributes exist after the enumerator, parse them.
4381 ParsedAttributesWithRange attrs(AttrFactory);
4382 MaybeParseGNUAttributes(attrs);
4383 ProhibitAttributes(attrs); // GNU-style attributes are prohibited.
4384 if (getLangOpts().CPlusPlus11 && isCXX11AttributeSpecifier()) {
4385 if (!getLangOpts().CPlusPlus1z)
4386 Diag(Tok.getLocation(), diag::warn_cxx14_compat_attribute)
4387 << 1 /*enumerator*/;
4388 ParseCXX11Attributes(attrs);
4391 SourceLocation EqualLoc;
4392 ExprResult AssignedVal;
4393 EnumAvailabilityDiags.emplace_back(*this);
4395 if (TryConsumeToken(tok::equal, EqualLoc)) {
4396 AssignedVal = ParseConstantExpression();
4397 if (AssignedVal.isInvalid())
4398 SkipUntil(tok::comma, tok::r_brace, StopBeforeMatch);
4401 // Install the enumerator constant into EnumDecl.
4402 Decl *EnumConstDecl = Actions.ActOnEnumConstant(
4403 getCurScope(), EnumDecl, LastEnumConstDecl, IdentLoc, Ident,
4404 attrs.getList(), EqualLoc, AssignedVal.get());
4405 EnumAvailabilityDiags.back().done();
4407 EnumConstantDecls.push_back(EnumConstDecl);
4408 LastEnumConstDecl = EnumConstDecl;
4410 if (Tok.is(tok::identifier)) {
4411 // We're missing a comma between enumerators.
4412 SourceLocation Loc = getEndOfPreviousToken();
4413 Diag(Loc, diag::err_enumerator_list_missing_comma)
4414 << FixItHint::CreateInsertion(Loc, ", ");
4418 // Emumerator definition must be finished, only comma or r_brace are
4420 SourceLocation CommaLoc;
4421 if (Tok.isNot(tok::r_brace) && !TryConsumeToken(tok::comma, CommaLoc)) {
4422 if (EqualLoc.isValid())
4423 Diag(Tok.getLocation(), diag::err_expected_either) << tok::r_brace
4426 Diag(Tok.getLocation(), diag::err_expected_end_of_enumerator);
4427 if (SkipUntil(tok::comma, tok::r_brace, StopBeforeMatch)) {
4428 if (TryConsumeToken(tok::comma, CommaLoc))
4435 // If comma is followed by r_brace, emit appropriate warning.
4436 if (Tok.is(tok::r_brace) && CommaLoc.isValid()) {
4437 if (!getLangOpts().C99 && !getLangOpts().CPlusPlus11)
4438 Diag(CommaLoc, getLangOpts().CPlusPlus ?
4439 diag::ext_enumerator_list_comma_cxx :
4440 diag::ext_enumerator_list_comma_c)
4441 << FixItHint::CreateRemoval(CommaLoc);
4442 else if (getLangOpts().CPlusPlus11)
4443 Diag(CommaLoc, diag::warn_cxx98_compat_enumerator_list_comma)
4444 << FixItHint::CreateRemoval(CommaLoc);
4452 // If attributes exist after the identifier list, parse them.
4453 ParsedAttributes attrs(AttrFactory);
4454 MaybeParseGNUAttributes(attrs);
4456 Actions.ActOnEnumBody(StartLoc, T.getRange(),
4457 EnumDecl, EnumConstantDecls,
4461 // Now handle enum constant availability diagnostics.
4462 assert(EnumConstantDecls.size() == EnumAvailabilityDiags.size());
4463 for (size_t i = 0, e = EnumConstantDecls.size(); i != e; ++i) {
4464 ParsingDeclRAIIObject PD(*this, ParsingDeclRAIIObject::NoParent);
4465 EnumAvailabilityDiags[i].redelay();
4466 PD.complete(EnumConstantDecls[i]);
4470 Actions.ActOnTagFinishDefinition(getCurScope(), EnumDecl, T.getRange());
4472 // The next token must be valid after an enum definition. If not, a ';'
4473 // was probably forgotten.
4474 bool CanBeBitfield = getCurScope()->getFlags() & Scope::ClassScope;
4475 if (!isValidAfterTypeSpecifier(CanBeBitfield)) {
4476 ExpectAndConsume(tok::semi, diag::err_expected_after, "enum");
4477 // Push this token back into the preprocessor and change our current token
4478 // to ';' so that the rest of the code recovers as though there were an
4479 // ';' after the definition.
4481 Tok.setKind(tok::semi);
4485 /// isKnownToBeTypeSpecifier - Return true if we know that the specified token
4486 /// is definitely a type-specifier. Return false if it isn't part of a type
4487 /// specifier or if we're not sure.
4488 bool Parser::isKnownToBeTypeSpecifier(const Token &Tok) const {
4489 switch (Tok.getKind()) {
4490 default: return false;
4494 case tok::kw___int64:
4495 case tok::kw___int128:
4496 case tok::kw_signed:
4497 case tok::kw_unsigned:
4498 case tok::kw__Complex:
4499 case tok::kw__Imaginary:
4502 case tok::kw_wchar_t:
4503 case tok::kw_char16_t:
4504 case tok::kw_char32_t:
4508 case tok::kw_double:
4509 case tok::kw___float128:
4512 case tok::kw__Decimal32:
4513 case tok::kw__Decimal64:
4514 case tok::kw__Decimal128:
4515 case tok::kw___vector:
4516 #define GENERIC_IMAGE_TYPE(ImgType, Id) case tok::kw_##ImgType##_t:
4517 #include "clang/Basic/OpenCLImageTypes.def"
4519 // struct-or-union-specifier (C99) or class-specifier (C++)
4521 case tok::kw_struct:
4522 case tok::kw___interface:
4528 case tok::annot_typename:
4533 /// isTypeSpecifierQualifier - Return true if the current token could be the
4534 /// start of a specifier-qualifier-list.
4535 bool Parser::isTypeSpecifierQualifier() {
4536 switch (Tok.getKind()) {
4537 default: return false;
4539 case tok::identifier: // foo::bar
4540 if (TryAltiVecVectorToken())
4543 case tok::kw_typename: // typename T::type
4544 // Annotate typenames and C++ scope specifiers. If we get one, just
4545 // recurse to handle whatever we get.
4546 if (TryAnnotateTypeOrScopeToken())
4548 if (Tok.is(tok::identifier))
4550 return isTypeSpecifierQualifier();
4552 case tok::coloncolon: // ::foo::bar
4553 if (NextToken().is(tok::kw_new) || // ::new
4554 NextToken().is(tok::kw_delete)) // ::delete
4557 if (TryAnnotateTypeOrScopeToken())
4559 return isTypeSpecifierQualifier();
4561 // GNU attributes support.
4562 case tok::kw___attribute:
4563 // GNU typeof support.
4564 case tok::kw_typeof:
4569 case tok::kw___int64:
4570 case tok::kw___int128:
4571 case tok::kw_signed:
4572 case tok::kw_unsigned:
4573 case tok::kw__Complex:
4574 case tok::kw__Imaginary:
4577 case tok::kw_wchar_t:
4578 case tok::kw_char16_t:
4579 case tok::kw_char32_t:
4583 case tok::kw_double:
4584 case tok::kw___float128:
4587 case tok::kw__Decimal32:
4588 case tok::kw__Decimal64:
4589 case tok::kw__Decimal128:
4590 case tok::kw___vector:
4591 #define GENERIC_IMAGE_TYPE(ImgType, Id) case tok::kw_##ImgType##_t:
4592 #include "clang/Basic/OpenCLImageTypes.def"
4594 // struct-or-union-specifier (C99) or class-specifier (C++)
4596 case tok::kw_struct:
4597 case tok::kw___interface:
4604 case tok::kw_volatile:
4605 case tok::kw_restrict:
4607 // Debugger support.
4608 case tok::kw___unknown_anytype:
4611 case tok::annot_typename:
4614 // GNU ObjC bizarre protocol extension: <proto1,proto2> with implicit 'id'.
4616 return getLangOpts().ObjC1;
4618 case tok::kw___cdecl:
4619 case tok::kw___stdcall:
4620 case tok::kw___fastcall:
4621 case tok::kw___thiscall:
4622 case tok::kw___regcall:
4623 case tok::kw___vectorcall:
4625 case tok::kw___ptr64:
4626 case tok::kw___ptr32:
4627 case tok::kw___pascal:
4628 case tok::kw___unaligned:
4630 case tok::kw__Nonnull:
4631 case tok::kw__Nullable:
4632 case tok::kw__Null_unspecified:
4634 case tok::kw___kindof:
4636 case tok::kw___private:
4637 case tok::kw___local:
4638 case tok::kw___global:
4639 case tok::kw___constant:
4640 case tok::kw___generic:
4641 case tok::kw___read_only:
4642 case tok::kw___read_write:
4643 case tok::kw___write_only:
4648 case tok::kw__Atomic:
4653 /// isDeclarationSpecifier() - Return true if the current token is part of a
4654 /// declaration specifier.
4656 /// \param DisambiguatingWithExpression True to indicate that the purpose of
4657 /// this check is to disambiguate between an expression and a declaration.
4658 bool Parser::isDeclarationSpecifier(bool DisambiguatingWithExpression) {
4659 switch (Tok.getKind()) {
4660 default: return false;
4663 return getLangOpts().OpenCL && (getLangOpts().OpenCLVersion >= 200);
4665 case tok::identifier: // foo::bar
4666 // Unfortunate hack to support "Class.factoryMethod" notation.
4667 if (getLangOpts().ObjC1 && NextToken().is(tok::period))
4669 if (TryAltiVecVectorToken())
4672 case tok::kw_decltype: // decltype(T())::type
4673 case tok::kw_typename: // typename T::type
4674 // Annotate typenames and C++ scope specifiers. If we get one, just
4675 // recurse to handle whatever we get.
4676 if (TryAnnotateTypeOrScopeToken())
4678 if (Tok.is(tok::identifier))
4681 // If we're in Objective-C and we have an Objective-C class type followed
4682 // by an identifier and then either ':' or ']', in a place where an
4683 // expression is permitted, then this is probably a class message send
4684 // missing the initial '['. In this case, we won't consider this to be
4685 // the start of a declaration.
4686 if (DisambiguatingWithExpression &&
4687 isStartOfObjCClassMessageMissingOpenBracket())
4690 return isDeclarationSpecifier();
4692 case tok::coloncolon: // ::foo::bar
4693 if (NextToken().is(tok::kw_new) || // ::new
4694 NextToken().is(tok::kw_delete)) // ::delete
4697 // Annotate typenames and C++ scope specifiers. If we get one, just
4698 // recurse to handle whatever we get.
4699 if (TryAnnotateTypeOrScopeToken())
4701 return isDeclarationSpecifier();
4703 // storage-class-specifier
4704 case tok::kw_typedef:
4705 case tok::kw_extern:
4706 case tok::kw___private_extern__:
4707 case tok::kw_static:
4709 case tok::kw___auto_type:
4710 case tok::kw_register:
4711 case tok::kw___thread:
4712 case tok::kw_thread_local:
4713 case tok::kw__Thread_local:
4716 case tok::kw___module_private__:
4719 case tok::kw___unknown_anytype:
4724 case tok::kw___int64:
4725 case tok::kw___int128:
4726 case tok::kw_signed:
4727 case tok::kw_unsigned:
4728 case tok::kw__Complex:
4729 case tok::kw__Imaginary:
4732 case tok::kw_wchar_t:
4733 case tok::kw_char16_t:
4734 case tok::kw_char32_t:
4739 case tok::kw_double:
4740 case tok::kw___float128:
4743 case tok::kw__Decimal32:
4744 case tok::kw__Decimal64:
4745 case tok::kw__Decimal128:
4746 case tok::kw___vector:
4748 // struct-or-union-specifier (C99) or class-specifier (C++)
4750 case tok::kw_struct:
4752 case tok::kw___interface:
4758 case tok::kw_volatile:
4759 case tok::kw_restrict:
4761 // function-specifier
4762 case tok::kw_inline:
4763 case tok::kw_virtual:
4764 case tok::kw_explicit:
4765 case tok::kw__Noreturn:
4767 // alignment-specifier
4768 case tok::kw__Alignas:
4771 case tok::kw_friend:
4773 // static_assert-declaration
4774 case tok::kw__Static_assert:
4776 // GNU typeof support.
4777 case tok::kw_typeof:
4780 case tok::kw___attribute:
4782 // C++11 decltype and constexpr.
4783 case tok::annot_decltype:
4784 case tok::kw_constexpr:
4786 // C++ Concepts TS - concept
4787 case tok::kw_concept:
4790 case tok::kw__Atomic:
4793 // GNU ObjC bizarre protocol extension: <proto1,proto2> with implicit 'id'.
4795 return getLangOpts().ObjC1;
4798 case tok::annot_typename:
4799 return !DisambiguatingWithExpression ||
4800 !isStartOfObjCClassMessageMissingOpenBracket();
4802 case tok::kw___declspec:
4803 case tok::kw___cdecl:
4804 case tok::kw___stdcall:
4805 case tok::kw___fastcall:
4806 case tok::kw___thiscall:
4807 case tok::kw___regcall:
4808 case tok::kw___vectorcall:
4810 case tok::kw___sptr:
4811 case tok::kw___uptr:
4812 case tok::kw___ptr64:
4813 case tok::kw___ptr32:
4814 case tok::kw___forceinline:
4815 case tok::kw___pascal:
4816 case tok::kw___unaligned:
4818 case tok::kw__Nonnull:
4819 case tok::kw__Nullable:
4820 case tok::kw__Null_unspecified:
4822 case tok::kw___kindof:
4824 case tok::kw___private:
4825 case tok::kw___local:
4826 case tok::kw___global:
4827 case tok::kw___constant:
4828 case tok::kw___generic:
4829 case tok::kw___read_only:
4830 case tok::kw___read_write:
4831 case tok::kw___write_only:
4832 #define GENERIC_IMAGE_TYPE(ImgType, Id) case tok::kw_##ImgType##_t:
4833 #include "clang/Basic/OpenCLImageTypes.def"
4839 bool Parser::isConstructorDeclarator(bool IsUnqualified, bool DeductionGuide) {
4840 TentativeParsingAction TPA(*this);
4842 // Parse the C++ scope specifier.
4844 if (ParseOptionalCXXScopeSpecifier(SS, nullptr,
4845 /*EnteringContext=*/true)) {
4850 // Parse the constructor name.
4851 if (Tok.is(tok::identifier)) {
4852 // We already know that we have a constructor name; just consume
4855 } else if (Tok.is(tok::annot_template_id)) {
4856 ConsumeAnnotationToken();
4862 // There may be attributes here, appertaining to the constructor name or type
4863 // we just stepped past.
4864 SkipCXX11Attributes();
4866 // Current class name must be followed by a left parenthesis.
4867 if (Tok.isNot(tok::l_paren)) {
4873 // A right parenthesis, or ellipsis followed by a right parenthesis signals
4874 // that we have a constructor.
4875 if (Tok.is(tok::r_paren) ||
4876 (Tok.is(tok::ellipsis) && NextToken().is(tok::r_paren))) {
4881 // A C++11 attribute here signals that we have a constructor, and is an
4882 // attribute on the first constructor parameter.
4883 if (getLangOpts().CPlusPlus11 &&
4884 isCXX11AttributeSpecifier(/*Disambiguate*/ false,
4885 /*OuterMightBeMessageSend*/ true)) {
4890 // If we need to, enter the specified scope.
4891 DeclaratorScopeObj DeclScopeObj(*this, SS);
4892 if (SS.isSet() && Actions.ShouldEnterDeclaratorScope(getCurScope(), SS))
4893 DeclScopeObj.EnterDeclaratorScope();
4895 // Optionally skip Microsoft attributes.
4896 ParsedAttributes Attrs(AttrFactory);
4897 MaybeParseMicrosoftAttributes(Attrs);
4899 // Check whether the next token(s) are part of a declaration
4900 // specifier, in which case we have the start of a parameter and,
4901 // therefore, we know that this is a constructor.
4902 bool IsConstructor = false;
4903 if (isDeclarationSpecifier())
4904 IsConstructor = true;
4905 else if (Tok.is(tok::identifier) ||
4906 (Tok.is(tok::annot_cxxscope) && NextToken().is(tok::identifier))) {
4907 // We've seen "C ( X" or "C ( X::Y", but "X" / "X::Y" is not a type.
4908 // This might be a parenthesized member name, but is more likely to
4909 // be a constructor declaration with an invalid argument type. Keep
4911 if (Tok.is(tok::annot_cxxscope))
4912 ConsumeAnnotationToken();
4915 // If this is not a constructor, we must be parsing a declarator,
4916 // which must have one of the following syntactic forms (see the
4917 // grammar extract at the start of ParseDirectDeclarator):
4918 switch (Tok.getKind()) {
4923 // C(X [ [attribute]]);
4924 case tok::coloncolon:
4927 // Assume this isn't a constructor, rather than assuming it's a
4928 // constructor with an unnamed parameter of an ill-formed type.
4934 // Skip past the right-paren and any following attributes to get to
4935 // the function body or trailing-return-type.
4937 SkipCXX11Attributes();
4939 if (DeductionGuide) {
4940 // C(X) -> ... is a deduction guide.
4941 IsConstructor = Tok.is(tok::arrow);
4944 if (Tok.is(tok::colon) || Tok.is(tok::kw_try)) {
4945 // Assume these were meant to be constructors:
4946 // C(X) : (the name of a bit-field cannot be parenthesized).
4947 // C(X) try (this is otherwise ill-formed).
4948 IsConstructor = true;
4950 if (Tok.is(tok::semi) || Tok.is(tok::l_brace)) {
4951 // If we have a constructor name within the class definition,
4952 // assume these were meant to be constructors:
4955 // ... because otherwise we would be declaring a non-static data
4956 // member that is ill-formed because it's of the same type as its
4957 // surrounding class.
4959 // FIXME: We can actually do this whether or not the name is qualified,
4960 // because if it is qualified in this context it must be being used as
4961 // a constructor name.
4962 // currently, so we're somewhat conservative here.
4963 IsConstructor = IsUnqualified;
4968 IsConstructor = true;
4974 return IsConstructor;
4977 /// ParseTypeQualifierListOpt
4978 /// type-qualifier-list: [C99 6.7.5]
4980 /// [vendor] attributes
4981 /// [ only if AttrReqs & AR_VendorAttributesParsed ]
4982 /// type-qualifier-list type-qualifier
4983 /// [vendor] type-qualifier-list attributes
4984 /// [ only if AttrReqs & AR_VendorAttributesParsed ]
4985 /// [C++0x] attribute-specifier[opt] is allowed before cv-qualifier-seq
4986 /// [ only if AttReqs & AR_CXX11AttributesParsed ]
4987 /// Note: vendor can be GNU, MS, etc and can be explicitly controlled via
4988 /// AttrRequirements bitmask values.
4989 void Parser::ParseTypeQualifierListOpt(
4990 DeclSpec &DS, unsigned AttrReqs, bool AtomicAllowed,
4991 bool IdentifierRequired,
4992 Optional<llvm::function_ref<void()>> CodeCompletionHandler) {
4993 if (getLangOpts().CPlusPlus11 && (AttrReqs & AR_CXX11AttributesParsed) &&
4994 isCXX11AttributeSpecifier()) {
4995 ParsedAttributesWithRange attrs(AttrFactory);
4996 ParseCXX11Attributes(attrs);
4997 DS.takeAttributesFrom(attrs);
5000 SourceLocation EndLoc;
5003 bool isInvalid = false;
5004 const char *PrevSpec = nullptr;
5005 unsigned DiagID = 0;
5006 SourceLocation Loc = Tok.getLocation();
5008 switch (Tok.getKind()) {
5009 case tok::code_completion:
5010 if (CodeCompletionHandler)
5011 (*CodeCompletionHandler)();
5013 Actions.CodeCompleteTypeQualifiers(DS);
5014 return cutOffParsing();
5017 isInvalid = DS.SetTypeQual(DeclSpec::TQ_const , Loc, PrevSpec, DiagID,
5020 case tok::kw_volatile:
5021 isInvalid = DS.SetTypeQual(DeclSpec::TQ_volatile, Loc, PrevSpec, DiagID,
5024 case tok::kw_restrict:
5025 isInvalid = DS.SetTypeQual(DeclSpec::TQ_restrict, Loc, PrevSpec, DiagID,
5028 case tok::kw__Atomic:
5030 goto DoneWithTypeQuals;
5031 isInvalid = DS.SetTypeQual(DeclSpec::TQ_atomic, Loc, PrevSpec, DiagID,
5035 // OpenCL qualifiers:
5036 case tok::kw___private:
5037 case tok::kw___global:
5038 case tok::kw___local:
5039 case tok::kw___constant:
5040 case tok::kw___generic:
5041 case tok::kw___read_only:
5042 case tok::kw___write_only:
5043 case tok::kw___read_write:
5044 ParseOpenCLQualifiers(DS.getAttributes());
5047 case tok::kw___unaligned:
5048 isInvalid = DS.SetTypeQual(DeclSpec::TQ_unaligned, Loc, PrevSpec, DiagID,
5051 case tok::kw___uptr:
5052 // GNU libc headers in C mode use '__uptr' as an identifer which conflicts
5053 // with the MS modifier keyword.
5054 if ((AttrReqs & AR_DeclspecAttributesParsed) && !getLangOpts().CPlusPlus &&
5055 IdentifierRequired && DS.isEmpty() && NextToken().is(tok::semi)) {
5056 if (TryKeywordIdentFallback(false))
5060 case tok::kw___sptr:
5062 case tok::kw___ptr64:
5063 case tok::kw___ptr32:
5064 case tok::kw___cdecl:
5065 case tok::kw___stdcall:
5066 case tok::kw___fastcall:
5067 case tok::kw___thiscall:
5068 case tok::kw___regcall:
5069 case tok::kw___vectorcall:
5070 if (AttrReqs & AR_DeclspecAttributesParsed) {
5071 ParseMicrosoftTypeAttributes(DS.getAttributes());
5074 goto DoneWithTypeQuals;
5075 case tok::kw___pascal:
5076 if (AttrReqs & AR_VendorAttributesParsed) {
5077 ParseBorlandTypeAttributes(DS.getAttributes());
5080 goto DoneWithTypeQuals;
5082 // Nullability type specifiers.
5083 case tok::kw__Nonnull:
5084 case tok::kw__Nullable:
5085 case tok::kw__Null_unspecified:
5086 ParseNullabilityTypeSpecifiers(DS.getAttributes());
5089 // Objective-C 'kindof' types.
5090 case tok::kw___kindof:
5091 DS.getAttributes().addNew(Tok.getIdentifierInfo(), Loc, nullptr, Loc,
5092 nullptr, 0, AttributeList::AS_Keyword);
5093 (void)ConsumeToken();
5096 case tok::kw___attribute:
5097 if (AttrReqs & AR_GNUAttributesParsedAndRejected)
5098 // When GNU attributes are expressly forbidden, diagnose their usage.
5099 Diag(Tok, diag::err_attributes_not_allowed);
5101 // Parse the attributes even if they are rejected to ensure that error
5102 // recovery is graceful.
5103 if (AttrReqs & AR_GNUAttributesParsed ||
5104 AttrReqs & AR_GNUAttributesParsedAndRejected) {
5105 ParseGNUAttributes(DS.getAttributes());
5106 continue; // do *not* consume the next token!
5108 // otherwise, FALL THROUGH!
5112 // If this is not a type-qualifier token, we're done reading type
5113 // qualifiers. First verify that DeclSpec's are consistent.
5114 DS.Finish(Actions, Actions.getASTContext().getPrintingPolicy());
5115 if (EndLoc.isValid())
5116 DS.SetRangeEnd(EndLoc);
5120 // If the specifier combination wasn't legal, issue a diagnostic.
5122 assert(PrevSpec && "Method did not return previous specifier!");
5123 Diag(Tok, DiagID) << PrevSpec;
5125 EndLoc = ConsumeToken();
5129 /// ParseDeclarator - Parse and verify a newly-initialized declarator.
5131 void Parser::ParseDeclarator(Declarator &D) {
5132 /// This implements the 'declarator' production in the C grammar, then checks
5133 /// for well-formedness and issues diagnostics.
5134 ParseDeclaratorInternal(D, &Parser::ParseDirectDeclarator);
5137 static bool isPtrOperatorToken(tok::TokenKind Kind, const LangOptions &Lang,
5138 unsigned TheContext) {
5139 if (Kind == tok::star || Kind == tok::caret)
5142 if ((Kind == tok::kw_pipe) && Lang.OpenCL && (Lang.OpenCLVersion >= 200))
5145 if (!Lang.CPlusPlus)
5148 if (Kind == tok::amp)
5151 // We parse rvalue refs in C++03, because otherwise the errors are scary.
5152 // But we must not parse them in conversion-type-ids and new-type-ids, since
5153 // those can be legitimately followed by a && operator.
5154 // (The same thing can in theory happen after a trailing-return-type, but
5155 // since those are a C++11 feature, there is no rejects-valid issue there.)
5156 if (Kind == tok::ampamp)
5157 return Lang.CPlusPlus11 || (TheContext != Declarator::ConversionIdContext &&
5158 TheContext != Declarator::CXXNewContext);
5163 // Indicates whether the given declarator is a pipe declarator.
5164 static bool isPipeDeclerator(const Declarator &D) {
5165 const unsigned NumTypes = D.getNumTypeObjects();
5167 for (unsigned Idx = 0; Idx != NumTypes; ++Idx)
5168 if (DeclaratorChunk::Pipe == D.getTypeObject(Idx).Kind)
5174 /// ParseDeclaratorInternal - Parse a C or C++ declarator. The direct-declarator
5175 /// is parsed by the function passed to it. Pass null, and the direct-declarator
5176 /// isn't parsed at all, making this function effectively parse the C++
5177 /// ptr-operator production.
5179 /// If the grammar of this construct is extended, matching changes must also be
5180 /// made to TryParseDeclarator and MightBeDeclarator, and possibly to
5181 /// isConstructorDeclarator.
5183 /// declarator: [C99 6.7.5] [C++ 8p4, dcl.decl]
5184 /// [C] pointer[opt] direct-declarator
5185 /// [C++] direct-declarator
5186 /// [C++] ptr-operator declarator
5188 /// pointer: [C99 6.7.5]
5189 /// '*' type-qualifier-list[opt]
5190 /// '*' type-qualifier-list[opt] pointer
5193 /// '*' cv-qualifier-seq[opt]
5196 /// [GNU] '&' restrict[opt] attributes[opt]
5197 /// [GNU?] '&&' restrict[opt] attributes[opt]
5198 /// '::'[opt] nested-name-specifier '*' cv-qualifier-seq[opt]
5199 void Parser::ParseDeclaratorInternal(Declarator &D,
5200 DirectDeclParseFunction DirectDeclParser) {
5201 if (Diags.hasAllExtensionsSilenced())
5204 // C++ member pointers start with a '::' or a nested-name.
5205 // Member pointers get special handling, since there's no place for the
5206 // scope spec in the generic path below.
5207 if (getLangOpts().CPlusPlus &&
5208 (Tok.is(tok::coloncolon) || Tok.is(tok::kw_decltype) ||
5209 (Tok.is(tok::identifier) &&
5210 (NextToken().is(tok::coloncolon) || NextToken().is(tok::less))) ||
5211 Tok.is(tok::annot_cxxscope))) {
5212 bool EnteringContext = D.getContext() == Declarator::FileContext ||
5213 D.getContext() == Declarator::MemberContext;
5215 ParseOptionalCXXScopeSpecifier(SS, nullptr, EnteringContext);
5217 if (SS.isNotEmpty()) {
5218 if (Tok.isNot(tok::star)) {
5219 // The scope spec really belongs to the direct-declarator.
5220 if (D.mayHaveIdentifier())
5221 D.getCXXScopeSpec() = SS;
5223 AnnotateScopeToken(SS, true);
5225 if (DirectDeclParser)
5226 (this->*DirectDeclParser)(D);
5230 SourceLocation Loc = ConsumeToken();
5232 DeclSpec DS(AttrFactory);
5233 ParseTypeQualifierListOpt(DS);
5234 D.ExtendWithDeclSpec(DS);
5236 // Recurse to parse whatever is left.
5237 ParseDeclaratorInternal(D, DirectDeclParser);
5239 // Sema will have to catch (syntactically invalid) pointers into global
5240 // scope. It has to catch pointers into namespace scope anyway.
5241 D.AddTypeInfo(DeclaratorChunk::getMemberPointer(SS,DS.getTypeQualifiers(),
5244 /* Don't replace range end. */SourceLocation());
5249 tok::TokenKind Kind = Tok.getKind();
5251 if (D.getDeclSpec().isTypeSpecPipe() && !isPipeDeclerator(D)) {
5252 DeclSpec DS(AttrFactory);
5253 ParseTypeQualifierListOpt(DS);
5256 DeclaratorChunk::getPipe(DS.getTypeQualifiers(), DS.getPipeLoc()),
5257 DS.getAttributes(), SourceLocation());
5260 // Not a pointer, C++ reference, or block.
5261 if (!isPtrOperatorToken(Kind, getLangOpts(), D.getContext())) {
5262 if (DirectDeclParser)
5263 (this->*DirectDeclParser)(D);
5267 // Otherwise, '*' -> pointer, '^' -> block, '&' -> lvalue reference,
5268 // '&&' -> rvalue reference
5269 SourceLocation Loc = ConsumeToken(); // Eat the *, ^, & or &&.
5272 if (Kind == tok::star || Kind == tok::caret) {
5274 DeclSpec DS(AttrFactory);
5276 // GNU attributes are not allowed here in a new-type-id, but Declspec and
5277 // C++11 attributes are allowed.
5278 unsigned Reqs = AR_CXX11AttributesParsed | AR_DeclspecAttributesParsed |
5279 ((D.getContext() != Declarator::CXXNewContext)
5280 ? AR_GNUAttributesParsed
5281 : AR_GNUAttributesParsedAndRejected);
5282 ParseTypeQualifierListOpt(DS, Reqs, true, !D.mayOmitIdentifier());
5283 D.ExtendWithDeclSpec(DS);
5285 // Recursively parse the declarator.
5286 ParseDeclaratorInternal(D, DirectDeclParser);
5287 if (Kind == tok::star)
5288 // Remember that we parsed a pointer type, and remember the type-quals.
5289 D.AddTypeInfo(DeclaratorChunk::getPointer(DS.getTypeQualifiers(), Loc,
5290 DS.getConstSpecLoc(),
5291 DS.getVolatileSpecLoc(),
5292 DS.getRestrictSpecLoc(),
5293 DS.getAtomicSpecLoc(),
5294 DS.getUnalignedSpecLoc()),
5298 // Remember that we parsed a Block type, and remember the type-quals.
5299 D.AddTypeInfo(DeclaratorChunk::getBlockPointer(DS.getTypeQualifiers(),
5305 DeclSpec DS(AttrFactory);
5307 // Complain about rvalue references in C++03, but then go on and build
5309 if (Kind == tok::ampamp)
5310 Diag(Loc, getLangOpts().CPlusPlus11 ?
5311 diag::warn_cxx98_compat_rvalue_reference :
5312 diag::ext_rvalue_reference);
5314 // GNU-style and C++11 attributes are allowed here, as is restrict.
5315 ParseTypeQualifierListOpt(DS);
5316 D.ExtendWithDeclSpec(DS);
5318 // C++ 8.3.2p1: cv-qualified references are ill-formed except when the
5319 // cv-qualifiers are introduced through the use of a typedef or of a
5320 // template type argument, in which case the cv-qualifiers are ignored.
5321 if (DS.getTypeQualifiers() != DeclSpec::TQ_unspecified) {
5322 if (DS.getTypeQualifiers() & DeclSpec::TQ_const)
5323 Diag(DS.getConstSpecLoc(),
5324 diag::err_invalid_reference_qualifier_application) << "const";
5325 if (DS.getTypeQualifiers() & DeclSpec::TQ_volatile)
5326 Diag(DS.getVolatileSpecLoc(),
5327 diag::err_invalid_reference_qualifier_application) << "volatile";
5328 // 'restrict' is permitted as an extension.
5329 if (DS.getTypeQualifiers() & DeclSpec::TQ_atomic)
5330 Diag(DS.getAtomicSpecLoc(),
5331 diag::err_invalid_reference_qualifier_application) << "_Atomic";
5334 // Recursively parse the declarator.
5335 ParseDeclaratorInternal(D, DirectDeclParser);
5337 if (D.getNumTypeObjects() > 0) {
5338 // C++ [dcl.ref]p4: There shall be no references to references.
5339 DeclaratorChunk& InnerChunk = D.getTypeObject(D.getNumTypeObjects() - 1);
5340 if (InnerChunk.Kind == DeclaratorChunk::Reference) {
5341 if (const IdentifierInfo *II = D.getIdentifier())
5342 Diag(InnerChunk.Loc, diag::err_illegal_decl_reference_to_reference)
5345 Diag(InnerChunk.Loc, diag::err_illegal_decl_reference_to_reference)
5348 // Once we've complained about the reference-to-reference, we
5349 // can go ahead and build the (technically ill-formed)
5350 // declarator: reference collapsing will take care of it.
5354 // Remember that we parsed a reference type.
5355 D.AddTypeInfo(DeclaratorChunk::getReference(DS.getTypeQualifiers(), Loc,
5362 // When correcting from misplaced brackets before the identifier, the location
5363 // is saved inside the declarator so that other diagnostic messages can use
5364 // them. This extracts and returns that location, or returns the provided
5365 // location if a stored location does not exist.
5366 static SourceLocation getMissingDeclaratorIdLoc(Declarator &D,
5367 SourceLocation Loc) {
5368 if (D.getName().StartLocation.isInvalid() &&
5369 D.getName().EndLocation.isValid())
5370 return D.getName().EndLocation;
5375 /// ParseDirectDeclarator
5376 /// direct-declarator: [C99 6.7.5]
5377 /// [C99] identifier
5378 /// '(' declarator ')'
5379 /// [GNU] '(' attributes declarator ')'
5380 /// [C90] direct-declarator '[' constant-expression[opt] ']'
5381 /// [C99] direct-declarator '[' type-qual-list[opt] assignment-expr[opt] ']'
5382 /// [C99] direct-declarator '[' 'static' type-qual-list[opt] assign-expr ']'
5383 /// [C99] direct-declarator '[' type-qual-list 'static' assignment-expr ']'
5384 /// [C99] direct-declarator '[' type-qual-list[opt] '*' ']'
5385 /// [C++11] direct-declarator '[' constant-expression[opt] ']'
5386 /// attribute-specifier-seq[opt]
5387 /// direct-declarator '(' parameter-type-list ')'
5388 /// direct-declarator '(' identifier-list[opt] ')'
5389 /// [GNU] direct-declarator '(' parameter-forward-declarations
5390 /// parameter-type-list[opt] ')'
5391 /// [C++] direct-declarator '(' parameter-declaration-clause ')'
5392 /// cv-qualifier-seq[opt] exception-specification[opt]
5393 /// [C++11] direct-declarator '(' parameter-declaration-clause ')'
5394 /// attribute-specifier-seq[opt] cv-qualifier-seq[opt]
5395 /// ref-qualifier[opt] exception-specification[opt]
5396 /// [C++] declarator-id
5397 /// [C++11] declarator-id attribute-specifier-seq[opt]
5399 /// declarator-id: [C++ 8]
5400 /// '...'[opt] id-expression
5401 /// '::'[opt] nested-name-specifier[opt] type-name
5403 /// id-expression: [C++ 5.1]
5407 /// unqualified-id: [C++ 5.1]
5409 /// operator-function-id
5410 /// conversion-function-id
5414 /// C++17 adds the following, which we also handle here:
5416 /// simple-declaration:
5417 /// <decl-spec> '[' identifier-list ']' brace-or-equal-initializer ';'
5419 /// Note, any additional constructs added here may need corresponding changes
5420 /// in isConstructorDeclarator.
5421 void Parser::ParseDirectDeclarator(Declarator &D) {
5422 DeclaratorScopeObj DeclScopeObj(*this, D.getCXXScopeSpec());
5424 if (getLangOpts().CPlusPlus && D.mayHaveIdentifier()) {
5425 // This might be a C++17 structured binding.
5426 if (Tok.is(tok::l_square) && !D.mayOmitIdentifier() &&
5427 D.getCXXScopeSpec().isEmpty())
5428 return ParseDecompositionDeclarator(D);
5430 // Don't parse FOO:BAR as if it were a typo for FOO::BAR inside a class, in
5431 // this context it is a bitfield. Also in range-based for statement colon
5432 // may delimit for-range-declaration.
5433 ColonProtectionRAIIObject X(*this,
5434 D.getContext() == Declarator::MemberContext ||
5435 (D.getContext() == Declarator::ForContext &&
5436 getLangOpts().CPlusPlus11));
5438 // ParseDeclaratorInternal might already have parsed the scope.
5439 if (D.getCXXScopeSpec().isEmpty()) {
5440 bool EnteringContext = D.getContext() == Declarator::FileContext ||
5441 D.getContext() == Declarator::MemberContext;
5442 ParseOptionalCXXScopeSpecifier(D.getCXXScopeSpec(), nullptr,
5446 if (D.getCXXScopeSpec().isValid()) {
5447 if (Actions.ShouldEnterDeclaratorScope(getCurScope(),
5448 D.getCXXScopeSpec()))
5449 // Change the declaration context for name lookup, until this function
5450 // is exited (and the declarator has been parsed).
5451 DeclScopeObj.EnterDeclaratorScope();
5452 else if (getObjCDeclContext()) {
5453 // Ensure that we don't interpret the next token as an identifier when
5454 // dealing with declarations in an Objective-C container.
5455 D.SetIdentifier(nullptr, Tok.getLocation());
5456 D.setInvalidType(true);
5458 goto PastIdentifier;
5462 // C++0x [dcl.fct]p14:
5463 // There is a syntactic ambiguity when an ellipsis occurs at the end of a
5464 // parameter-declaration-clause without a preceding comma. In this case,
5465 // the ellipsis is parsed as part of the abstract-declarator if the type
5466 // of the parameter either names a template parameter pack that has not
5467 // been expanded or contains auto; otherwise, it is parsed as part of the
5468 // parameter-declaration-clause.
5469 if (Tok.is(tok::ellipsis) && D.getCXXScopeSpec().isEmpty() &&
5470 !((D.getContext() == Declarator::PrototypeContext ||
5471 D.getContext() == Declarator::LambdaExprParameterContext ||
5472 D.getContext() == Declarator::BlockLiteralContext) &&
5473 NextToken().is(tok::r_paren) &&
5474 !D.hasGroupingParens() &&
5475 !Actions.containsUnexpandedParameterPacks(D) &&
5476 D.getDeclSpec().getTypeSpecType() != TST_auto)) {
5477 SourceLocation EllipsisLoc = ConsumeToken();
5478 if (isPtrOperatorToken(Tok.getKind(), getLangOpts(), D.getContext())) {
5479 // The ellipsis was put in the wrong place. Recover, and explain to
5480 // the user what they should have done.
5482 if (EllipsisLoc.isValid())
5483 DiagnoseMisplacedEllipsisInDeclarator(EllipsisLoc, D);
5486 D.setEllipsisLoc(EllipsisLoc);
5488 // The ellipsis can't be followed by a parenthesized declarator. We
5489 // check for that in ParseParenDeclarator, after we have disambiguated
5490 // the l_paren token.
5493 if (Tok.isOneOf(tok::identifier, tok::kw_operator, tok::annot_template_id,
5495 // We found something that indicates the start of an unqualified-id.
5496 // Parse that unqualified-id.
5497 bool AllowConstructorName;
5498 bool AllowDeductionGuide;
5499 if (D.getDeclSpec().hasTypeSpecifier()) {
5500 AllowConstructorName = false;
5501 AllowDeductionGuide = false;
5502 } else if (D.getCXXScopeSpec().isSet()) {
5503 AllowConstructorName =
5504 (D.getContext() == Declarator::FileContext ||
5505 D.getContext() == Declarator::MemberContext);
5506 AllowDeductionGuide = false;
5508 AllowConstructorName = (D.getContext() == Declarator::MemberContext);
5509 AllowDeductionGuide =
5510 (D.getContext() == Declarator::FileContext ||
5511 D.getContext() == Declarator::MemberContext);
5514 SourceLocation TemplateKWLoc;
5515 bool HadScope = D.getCXXScopeSpec().isValid();
5516 if (ParseUnqualifiedId(D.getCXXScopeSpec(),
5517 /*EnteringContext=*/true,
5518 /*AllowDestructorName=*/true, AllowConstructorName,
5519 AllowDeductionGuide, nullptr, TemplateKWLoc,
5521 // Once we're past the identifier, if the scope was bad, mark the
5522 // whole declarator bad.
5523 D.getCXXScopeSpec().isInvalid()) {
5524 D.SetIdentifier(nullptr, Tok.getLocation());
5525 D.setInvalidType(true);
5527 // ParseUnqualifiedId might have parsed a scope specifier during error
5528 // recovery. If it did so, enter that scope.
5529 if (!HadScope && D.getCXXScopeSpec().isValid() &&
5530 Actions.ShouldEnterDeclaratorScope(getCurScope(),
5531 D.getCXXScopeSpec()))
5532 DeclScopeObj.EnterDeclaratorScope();
5534 // Parsed the unqualified-id; update range information and move along.
5535 if (D.getSourceRange().getBegin().isInvalid())
5536 D.SetRangeBegin(D.getName().getSourceRange().getBegin());
5537 D.SetRangeEnd(D.getName().getSourceRange().getEnd());
5539 goto PastIdentifier;
5542 if (D.getCXXScopeSpec().isNotEmpty()) {
5543 // We have a scope specifier but no following unqualified-id.
5544 Diag(PP.getLocForEndOfToken(D.getCXXScopeSpec().getEndLoc()),
5545 diag::err_expected_unqualified_id)
5547 D.SetIdentifier(nullptr, Tok.getLocation());
5548 goto PastIdentifier;
5550 } else if (Tok.is(tok::identifier) && D.mayHaveIdentifier()) {
5551 assert(!getLangOpts().CPlusPlus &&
5552 "There's a C++-specific check for tok::identifier above");
5553 assert(Tok.getIdentifierInfo() && "Not an identifier?");
5554 D.SetIdentifier(Tok.getIdentifierInfo(), Tok.getLocation());
5555 D.SetRangeEnd(Tok.getLocation());
5557 goto PastIdentifier;
5558 } else if (Tok.is(tok::identifier) && !D.mayHaveIdentifier()) {
5559 // We're not allowed an identifier here, but we got one. Try to figure out
5560 // if the user was trying to attach a name to the type, or whether the name
5561 // is some unrelated trailing syntax.
5562 bool DiagnoseIdentifier = false;
5563 if (D.hasGroupingParens())
5564 // An identifier within parens is unlikely to be intended to be anything
5565 // other than a name being "declared".
5566 DiagnoseIdentifier = true;
5567 else if (D.getContext() == Declarator::TemplateTypeArgContext)
5568 // T<int N> is an accidental identifier; T<int N indicates a missing '>'.
5569 DiagnoseIdentifier =
5570 NextToken().isOneOf(tok::comma, tok::greater, tok::greatergreater);
5571 else if (D.getContext() == Declarator::AliasDeclContext ||
5572 D.getContext() == Declarator::AliasTemplateContext)
5573 // The most likely error is that the ';' was forgotten.
5574 DiagnoseIdentifier = NextToken().isOneOf(tok::comma, tok::semi);
5575 else if (D.getContext() == Declarator::TrailingReturnContext &&
5576 !isCXX11VirtSpecifier(Tok))
5577 DiagnoseIdentifier = NextToken().isOneOf(
5578 tok::comma, tok::semi, tok::equal, tok::l_brace, tok::kw_try);
5579 if (DiagnoseIdentifier) {
5580 Diag(Tok.getLocation(), diag::err_unexpected_unqualified_id)
5581 << FixItHint::CreateRemoval(Tok.getLocation());
5582 D.SetIdentifier(nullptr, Tok.getLocation());
5584 goto PastIdentifier;
5588 if (Tok.is(tok::l_paren)) {
5589 // direct-declarator: '(' declarator ')'
5590 // direct-declarator: '(' attributes declarator ')'
5591 // Example: 'char (*X)' or 'int (*XX)(void)'
5592 ParseParenDeclarator(D);
5594 // If the declarator was parenthesized, we entered the declarator
5595 // scope when parsing the parenthesized declarator, then exited
5596 // the scope already. Re-enter the scope, if we need to.
5597 if (D.getCXXScopeSpec().isSet()) {
5598 // If there was an error parsing parenthesized declarator, declarator
5599 // scope may have been entered before. Don't do it again.
5600 if (!D.isInvalidType() &&
5601 Actions.ShouldEnterDeclaratorScope(getCurScope(),
5602 D.getCXXScopeSpec()))
5603 // Change the declaration context for name lookup, until this function
5604 // is exited (and the declarator has been parsed).
5605 DeclScopeObj.EnterDeclaratorScope();
5607 } else if (D.mayOmitIdentifier()) {
5608 // This could be something simple like "int" (in which case the declarator
5609 // portion is empty), if an abstract-declarator is allowed.
5610 D.SetIdentifier(nullptr, Tok.getLocation());
5612 // The grammar for abstract-pack-declarator does not allow grouping parens.
5613 // FIXME: Revisit this once core issue 1488 is resolved.
5614 if (D.hasEllipsis() && D.hasGroupingParens())
5615 Diag(PP.getLocForEndOfToken(D.getEllipsisLoc()),
5616 diag::ext_abstract_pack_declarator_parens);
5618 if (Tok.getKind() == tok::annot_pragma_parser_crash)
5620 if (Tok.is(tok::l_square))
5621 return ParseMisplacedBracketDeclarator(D);
5622 if (D.getContext() == Declarator::MemberContext) {
5623 // Objective-C++: Detect C++ keywords and try to prevent further errors by
5624 // treating these keyword as valid member names.
5625 if (getLangOpts().ObjC1 && getLangOpts().CPlusPlus &&
5626 Tok.getIdentifierInfo() &&
5627 Tok.getIdentifierInfo()->isCPlusPlusKeyword(getLangOpts())) {
5628 Diag(getMissingDeclaratorIdLoc(D, Tok.getLocation()),
5629 diag::err_expected_member_name_or_semi_objcxx_keyword)
5630 << Tok.getIdentifierInfo()
5631 << (D.getDeclSpec().isEmpty() ? SourceRange()
5632 : D.getDeclSpec().getSourceRange());
5633 D.SetIdentifier(Tok.getIdentifierInfo(), Tok.getLocation());
5634 D.SetRangeEnd(Tok.getLocation());
5636 goto PastIdentifier;
5638 Diag(getMissingDeclaratorIdLoc(D, Tok.getLocation()),
5639 diag::err_expected_member_name_or_semi)
5640 << (D.getDeclSpec().isEmpty() ? SourceRange()
5641 : D.getDeclSpec().getSourceRange());
5642 } else if (getLangOpts().CPlusPlus) {
5643 if (Tok.isOneOf(tok::period, tok::arrow))
5644 Diag(Tok, diag::err_invalid_operator_on_type) << Tok.is(tok::arrow);
5646 SourceLocation Loc = D.getCXXScopeSpec().getEndLoc();
5647 if (Tok.isAtStartOfLine() && Loc.isValid())
5648 Diag(PP.getLocForEndOfToken(Loc), diag::err_expected_unqualified_id)
5649 << getLangOpts().CPlusPlus;
5651 Diag(getMissingDeclaratorIdLoc(D, Tok.getLocation()),
5652 diag::err_expected_unqualified_id)
5653 << getLangOpts().CPlusPlus;
5656 Diag(getMissingDeclaratorIdLoc(D, Tok.getLocation()),
5657 diag::err_expected_either)
5658 << tok::identifier << tok::l_paren;
5660 D.SetIdentifier(nullptr, Tok.getLocation());
5661 D.setInvalidType(true);
5665 assert(D.isPastIdentifier() &&
5666 "Haven't past the location of the identifier yet?");
5668 // Don't parse attributes unless we have parsed an unparenthesized name.
5669 if (D.hasName() && !D.getNumTypeObjects())
5670 MaybeParseCXX11Attributes(D);
5673 if (Tok.is(tok::l_paren)) {
5674 // Enter function-declaration scope, limiting any declarators to the
5675 // function prototype scope, including parameter declarators.
5676 ParseScope PrototypeScope(this,
5677 Scope::FunctionPrototypeScope|Scope::DeclScope|
5678 (D.isFunctionDeclaratorAFunctionDeclaration()
5679 ? Scope::FunctionDeclarationScope : 0));
5681 // The paren may be part of a C++ direct initializer, eg. "int x(1);".
5682 // In such a case, check if we actually have a function declarator; if it
5683 // is not, the declarator has been fully parsed.
5684 bool IsAmbiguous = false;
5685 if (getLangOpts().CPlusPlus && D.mayBeFollowedByCXXDirectInit()) {
5686 // The name of the declarator, if any, is tentatively declared within
5687 // a possible direct initializer.
5688 TentativelyDeclaredIdentifiers.push_back(D.getIdentifier());
5689 bool IsFunctionDecl = isCXXFunctionDeclarator(&IsAmbiguous);
5690 TentativelyDeclaredIdentifiers.pop_back();
5691 if (!IsFunctionDecl)
5694 ParsedAttributes attrs(AttrFactory);
5695 BalancedDelimiterTracker T(*this, tok::l_paren);
5697 ParseFunctionDeclarator(D, attrs, T, IsAmbiguous);
5698 PrototypeScope.Exit();
5699 } else if (Tok.is(tok::l_square)) {
5700 ParseBracketDeclarator(D);
5707 void Parser::ParseDecompositionDeclarator(Declarator &D) {
5708 assert(Tok.is(tok::l_square));
5710 // If this doesn't look like a structured binding, maybe it's a misplaced
5711 // array declarator.
5712 // FIXME: Consume the l_square first so we don't need extra lookahead for
5714 if (!(NextToken().is(tok::identifier) &&
5715 GetLookAheadToken(2).isOneOf(tok::comma, tok::r_square)) &&
5716 !(NextToken().is(tok::r_square) &&
5717 GetLookAheadToken(2).isOneOf(tok::equal, tok::l_brace)))
5718 return ParseMisplacedBracketDeclarator(D);
5720 BalancedDelimiterTracker T(*this, tok::l_square);
5723 SmallVector<DecompositionDeclarator::Binding, 32> Bindings;
5724 while (Tok.isNot(tok::r_square)) {
5725 if (!Bindings.empty()) {
5726 if (Tok.is(tok::comma))
5729 if (Tok.is(tok::identifier)) {
5730 SourceLocation EndLoc = getEndOfPreviousToken();
5731 Diag(EndLoc, diag::err_expected)
5732 << tok::comma << FixItHint::CreateInsertion(EndLoc, ",");
5734 Diag(Tok, diag::err_expected_comma_or_rsquare);
5737 SkipUntil(tok::r_square, tok::comma, tok::identifier,
5738 StopAtSemi | StopBeforeMatch);
5739 if (Tok.is(tok::comma))
5741 else if (Tok.isNot(tok::identifier))
5746 if (Tok.isNot(tok::identifier)) {
5747 Diag(Tok, diag::err_expected) << tok::identifier;
5751 Bindings.push_back({Tok.getIdentifierInfo(), Tok.getLocation()});
5755 if (Tok.isNot(tok::r_square))
5756 // We've already diagnosed a problem here.
5759 // C++17 does not allow the identifier-list in a structured binding
5761 if (Bindings.empty())
5762 Diag(Tok.getLocation(), diag::ext_decomp_decl_empty);
5767 return D.setDecompositionBindings(T.getOpenLocation(), Bindings,
5768 T.getCloseLocation());
5771 /// ParseParenDeclarator - We parsed the declarator D up to a paren. This is
5772 /// only called before the identifier, so these are most likely just grouping
5773 /// parens for precedence. If we find that these are actually function
5774 /// parameter parens in an abstract-declarator, we call ParseFunctionDeclarator.
5776 /// direct-declarator:
5777 /// '(' declarator ')'
5778 /// [GNU] '(' attributes declarator ')'
5779 /// direct-declarator '(' parameter-type-list ')'
5780 /// direct-declarator '(' identifier-list[opt] ')'
5781 /// [GNU] direct-declarator '(' parameter-forward-declarations
5782 /// parameter-type-list[opt] ')'
5784 void Parser::ParseParenDeclarator(Declarator &D) {
5785 BalancedDelimiterTracker T(*this, tok::l_paren);
5788 assert(!D.isPastIdentifier() && "Should be called before passing identifier");
5790 // Eat any attributes before we look at whether this is a grouping or function
5791 // declarator paren. If this is a grouping paren, the attribute applies to
5792 // the type being built up, for example:
5793 // int (__attribute__(()) *x)(long y)
5794 // If this ends up not being a grouping paren, the attribute applies to the
5795 // first argument, for example:
5796 // int (__attribute__(()) int x)
5797 // In either case, we need to eat any attributes to be able to determine what
5798 // sort of paren this is.
5800 ParsedAttributes attrs(AttrFactory);
5801 bool RequiresArg = false;
5802 if (Tok.is(tok::kw___attribute)) {
5803 ParseGNUAttributes(attrs);
5805 // We require that the argument list (if this is a non-grouping paren) be
5806 // present even if the attribute list was empty.
5810 // Eat any Microsoft extensions.
5811 ParseMicrosoftTypeAttributes(attrs);
5813 // Eat any Borland extensions.
5814 if (Tok.is(tok::kw___pascal))
5815 ParseBorlandTypeAttributes(attrs);
5817 // If we haven't past the identifier yet (or where the identifier would be
5818 // stored, if this is an abstract declarator), then this is probably just
5819 // grouping parens. However, if this could be an abstract-declarator, then
5820 // this could also be the start of function arguments (consider 'void()').
5823 if (!D.mayOmitIdentifier()) {
5824 // If this can't be an abstract-declarator, this *must* be a grouping
5825 // paren, because we haven't seen the identifier yet.
5827 } else if (Tok.is(tok::r_paren) || // 'int()' is a function.
5828 (getLangOpts().CPlusPlus && Tok.is(tok::ellipsis) &&
5829 NextToken().is(tok::r_paren)) || // C++ int(...)
5830 isDeclarationSpecifier() || // 'int(int)' is a function.
5831 isCXX11AttributeSpecifier()) { // 'int([[]]int)' is a function.
5832 // This handles C99 6.7.5.3p11: in "typedef int X; void foo(X)", X is
5833 // considered to be a type, not a K&R identifier-list.
5836 // Otherwise, this is a grouping paren, e.g. 'int (*X)' or 'int(X)'.
5840 // If this is a grouping paren, handle:
5841 // direct-declarator: '(' declarator ')'
5842 // direct-declarator: '(' attributes declarator ')'
5844 SourceLocation EllipsisLoc = D.getEllipsisLoc();
5845 D.setEllipsisLoc(SourceLocation());
5847 bool hadGroupingParens = D.hasGroupingParens();
5848 D.setGroupingParens(true);
5849 ParseDeclaratorInternal(D, &Parser::ParseDirectDeclarator);
5852 D.AddTypeInfo(DeclaratorChunk::getParen(T.getOpenLocation(),
5853 T.getCloseLocation()),
5854 attrs, T.getCloseLocation());
5856 D.setGroupingParens(hadGroupingParens);
5858 // An ellipsis cannot be placed outside parentheses.
5859 if (EllipsisLoc.isValid())
5860 DiagnoseMisplacedEllipsisInDeclarator(EllipsisLoc, D);
5865 // Okay, if this wasn't a grouping paren, it must be the start of a function
5866 // argument list. Recognize that this declarator will never have an
5867 // identifier (and remember where it would have been), then call into
5868 // ParseFunctionDeclarator to handle of argument list.
5869 D.SetIdentifier(nullptr, Tok.getLocation());
5871 // Enter function-declaration scope, limiting any declarators to the
5872 // function prototype scope, including parameter declarators.
5873 ParseScope PrototypeScope(this,
5874 Scope::FunctionPrototypeScope | Scope::DeclScope |
5875 (D.isFunctionDeclaratorAFunctionDeclaration()
5876 ? Scope::FunctionDeclarationScope : 0));
5877 ParseFunctionDeclarator(D, attrs, T, false, RequiresArg);
5878 PrototypeScope.Exit();
5881 /// ParseFunctionDeclarator - We are after the identifier and have parsed the
5882 /// declarator D up to a paren, which indicates that we are parsing function
5885 /// If FirstArgAttrs is non-null, then the caller parsed those arguments
5886 /// immediately after the open paren - they should be considered to be the
5887 /// first argument of a parameter.
5889 /// If RequiresArg is true, then the first argument of the function is required
5890 /// to be present and required to not be an identifier list.
5892 /// For C++, after the parameter-list, it also parses the cv-qualifier-seq[opt],
5893 /// (C++11) ref-qualifier[opt], exception-specification[opt],
5894 /// (C++11) attribute-specifier-seq[opt], and (C++11) trailing-return-type[opt].
5896 /// [C++11] exception-specification:
5897 /// dynamic-exception-specification
5898 /// noexcept-specification
5900 void Parser::ParseFunctionDeclarator(Declarator &D,
5901 ParsedAttributes &FirstArgAttrs,
5902 BalancedDelimiterTracker &Tracker,
5905 assert(getCurScope()->isFunctionPrototypeScope() &&
5906 "Should call from a Function scope");
5907 // lparen is already consumed!
5908 assert(D.isPastIdentifier() && "Should not call before identifier!");
5910 // This should be true when the function has typed arguments.
5911 // Otherwise, it is treated as a K&R-style function.
5912 bool HasProto = false;
5913 // Build up an array of information about the parsed arguments.
5914 SmallVector<DeclaratorChunk::ParamInfo, 16> ParamInfo;
5915 // Remember where we see an ellipsis, if any.
5916 SourceLocation EllipsisLoc;
5918 DeclSpec DS(AttrFactory);
5919 bool RefQualifierIsLValueRef = true;
5920 SourceLocation RefQualifierLoc;
5921 SourceLocation ConstQualifierLoc;
5922 SourceLocation VolatileQualifierLoc;
5923 SourceLocation RestrictQualifierLoc;
5924 ExceptionSpecificationType ESpecType = EST_None;
5925 SourceRange ESpecRange;
5926 SmallVector<ParsedType, 2> DynamicExceptions;
5927 SmallVector<SourceRange, 2> DynamicExceptionRanges;
5928 ExprResult NoexceptExpr;
5929 CachedTokens *ExceptionSpecTokens = nullptr;
5930 ParsedAttributes FnAttrs(AttrFactory);
5931 TypeResult TrailingReturnType;
5933 /* LocalEndLoc is the end location for the local FunctionTypeLoc.
5934 EndLoc is the end location for the function declarator.
5935 They differ for trailing return types. */
5936 SourceLocation StartLoc, LocalEndLoc, EndLoc;
5937 SourceLocation LParenLoc, RParenLoc;
5938 LParenLoc = Tracker.getOpenLocation();
5939 StartLoc = LParenLoc;
5941 if (isFunctionDeclaratorIdentifierList()) {
5943 Diag(Tok, diag::err_argument_required_after_attribute);
5945 ParseFunctionDeclaratorIdentifierList(D, ParamInfo);
5947 Tracker.consumeClose();
5948 RParenLoc = Tracker.getCloseLocation();
5949 LocalEndLoc = RParenLoc;
5952 if (Tok.isNot(tok::r_paren))
5953 ParseParameterDeclarationClause(D, FirstArgAttrs, ParamInfo,
5955 else if (RequiresArg)
5956 Diag(Tok, diag::err_argument_required_after_attribute);
5958 HasProto = ParamInfo.size() || getLangOpts().CPlusPlus;
5960 // If we have the closing ')', eat it.
5961 Tracker.consumeClose();
5962 RParenLoc = Tracker.getCloseLocation();
5963 LocalEndLoc = RParenLoc;
5966 if (getLangOpts().CPlusPlus) {
5967 // FIXME: Accept these components in any order, and produce fixits to
5968 // correct the order if the user gets it wrong. Ideally we should deal
5969 // with the pure-specifier in the same way.
5971 // Parse cv-qualifier-seq[opt].
5972 ParseTypeQualifierListOpt(DS, AR_NoAttributesParsed,
5973 /*AtomicAllowed*/ false,
5974 /*IdentifierRequired=*/false,
5975 llvm::function_ref<void()>([&]() {
5976 Actions.CodeCompleteFunctionQualifiers(DS, D);
5978 if (!DS.getSourceRange().getEnd().isInvalid()) {
5979 EndLoc = DS.getSourceRange().getEnd();
5980 ConstQualifierLoc = DS.getConstSpecLoc();
5981 VolatileQualifierLoc = DS.getVolatileSpecLoc();
5982 RestrictQualifierLoc = DS.getRestrictSpecLoc();
5985 // Parse ref-qualifier[opt].
5986 if (ParseRefQualifier(RefQualifierIsLValueRef, RefQualifierLoc))
5987 EndLoc = RefQualifierLoc;
5989 // C++11 [expr.prim.general]p3:
5990 // If a declaration declares a member function or member function
5991 // template of a class X, the expression this is a prvalue of type
5992 // "pointer to cv-qualifier-seq X" between the optional cv-qualifer-seq
5993 // and the end of the function-definition, member-declarator, or
5995 // FIXME: currently, "static" case isn't handled correctly.
5996 bool IsCXX11MemberFunction =
5997 getLangOpts().CPlusPlus11 &&
5998 D.getDeclSpec().getStorageClassSpec() != DeclSpec::SCS_typedef &&
5999 (D.getContext() == Declarator::MemberContext
6000 ? !D.getDeclSpec().isFriendSpecified()
6001 : D.getContext() == Declarator::FileContext &&
6002 D.getCXXScopeSpec().isValid() &&
6003 Actions.CurContext->isRecord());
6004 Sema::CXXThisScopeRAII ThisScope(Actions,
6005 dyn_cast<CXXRecordDecl>(Actions.CurContext),
6006 DS.getTypeQualifiers() |
6007 (D.getDeclSpec().isConstexprSpecified() &&
6008 !getLangOpts().CPlusPlus14
6009 ? Qualifiers::Const : 0),
6010 IsCXX11MemberFunction);
6012 // Parse exception-specification[opt].
6013 bool Delayed = D.isFirstDeclarationOfMember() &&
6014 D.isFunctionDeclaratorAFunctionDeclaration();
6015 if (Delayed && Actions.isLibstdcxxEagerExceptionSpecHack(D) &&
6016 GetLookAheadToken(0).is(tok::kw_noexcept) &&
6017 GetLookAheadToken(1).is(tok::l_paren) &&
6018 GetLookAheadToken(2).is(tok::kw_noexcept) &&
6019 GetLookAheadToken(3).is(tok::l_paren) &&
6020 GetLookAheadToken(4).is(tok::identifier) &&
6021 GetLookAheadToken(4).getIdentifierInfo()->isStr("swap")) {
6022 // HACK: We've got an exception-specification
6023 // noexcept(noexcept(swap(...)))
6025 // noexcept(noexcept(swap(...)) && noexcept(swap(...)))
6026 // on a 'swap' member function. This is a libstdc++ bug; the lookup
6027 // for 'swap' will only find the function we're currently declaring,
6028 // whereas it expects to find a non-member swap through ADL. Turn off
6029 // delayed parsing to give it a chance to find what it expects.
6032 ESpecType = tryParseExceptionSpecification(Delayed,
6035 DynamicExceptionRanges,
6037 ExceptionSpecTokens);
6038 if (ESpecType != EST_None)
6039 EndLoc = ESpecRange.getEnd();
6041 // Parse attribute-specifier-seq[opt]. Per DR 979 and DR 1297, this goes
6042 // after the exception-specification.
6043 MaybeParseCXX11Attributes(FnAttrs);
6045 // Parse trailing-return-type[opt].
6046 LocalEndLoc = EndLoc;
6047 if (getLangOpts().CPlusPlus11 && Tok.is(tok::arrow)) {
6048 Diag(Tok, diag::warn_cxx98_compat_trailing_return_type);
6049 if (D.getDeclSpec().getTypeSpecType() == TST_auto)
6050 StartLoc = D.getDeclSpec().getTypeSpecTypeLoc();
6051 LocalEndLoc = Tok.getLocation();
6053 TrailingReturnType = ParseTrailingReturnType(Range);
6054 EndLoc = Range.getEnd();
6059 // Collect non-parameter declarations from the prototype if this is a function
6060 // declaration. They will be moved into the scope of the function. Only do
6061 // this in C and not C++, where the decls will continue to live in the
6062 // surrounding context.
6063 SmallVector<NamedDecl *, 0> DeclsInPrototype;
6064 if (getCurScope()->getFlags() & Scope::FunctionDeclarationScope &&
6065 !getLangOpts().CPlusPlus) {
6066 for (Decl *D : getCurScope()->decls()) {
6067 NamedDecl *ND = dyn_cast<NamedDecl>(D);
6068 if (!ND || isa<ParmVarDecl>(ND))
6070 DeclsInPrototype.push_back(ND);
6074 // Remember that we parsed a function type, and remember the attributes.
6075 D.AddTypeInfo(DeclaratorChunk::getFunction(HasProto,
6078 ParamInfo.data(), ParamInfo.size(),
6079 EllipsisLoc, RParenLoc,
6080 DS.getTypeQualifiers(),
6081 RefQualifierIsLValueRef,
6082 RefQualifierLoc, ConstQualifierLoc,
6083 VolatileQualifierLoc,
6084 RestrictQualifierLoc,
6085 /*MutableLoc=*/SourceLocation(),
6086 ESpecType, ESpecRange,
6087 DynamicExceptions.data(),
6088 DynamicExceptionRanges.data(),
6089 DynamicExceptions.size(),
6090 NoexceptExpr.isUsable() ?
6091 NoexceptExpr.get() : nullptr,
6092 ExceptionSpecTokens,
6094 StartLoc, LocalEndLoc, D,
6095 TrailingReturnType),
6099 /// ParseRefQualifier - Parses a member function ref-qualifier. Returns
6100 /// true if a ref-qualifier is found.
6101 bool Parser::ParseRefQualifier(bool &RefQualifierIsLValueRef,
6102 SourceLocation &RefQualifierLoc) {
6103 if (Tok.isOneOf(tok::amp, tok::ampamp)) {
6104 Diag(Tok, getLangOpts().CPlusPlus11 ?
6105 diag::warn_cxx98_compat_ref_qualifier :
6106 diag::ext_ref_qualifier);
6108 RefQualifierIsLValueRef = Tok.is(tok::amp);
6109 RefQualifierLoc = ConsumeToken();
6115 /// isFunctionDeclaratorIdentifierList - This parameter list may have an
6116 /// identifier list form for a K&R-style function: void foo(a,b,c)
6118 /// Note that identifier-lists are only allowed for normal declarators, not for
6119 /// abstract-declarators.
6120 bool Parser::isFunctionDeclaratorIdentifierList() {
6121 return !getLangOpts().CPlusPlus
6122 && Tok.is(tok::identifier)
6123 && !TryAltiVecVectorToken()
6124 // K&R identifier lists can't have typedefs as identifiers, per C99
6126 && (TryAnnotateTypeOrScopeToken() || !Tok.is(tok::annot_typename))
6127 // Identifier lists follow a really simple grammar: the identifiers can
6128 // be followed *only* by a ", identifier" or ")". However, K&R
6129 // identifier lists are really rare in the brave new modern world, and
6130 // it is very common for someone to typo a type in a non-K&R style
6131 // list. If we are presented with something like: "void foo(intptr x,
6132 // float y)", we don't want to start parsing the function declarator as
6133 // though it is a K&R style declarator just because intptr is an
6136 // To handle this, we check to see if the token after the first
6137 // identifier is a "," or ")". Only then do we parse it as an
6139 && (!Tok.is(tok::eof) &&
6140 (NextToken().is(tok::comma) || NextToken().is(tok::r_paren)));
6143 /// ParseFunctionDeclaratorIdentifierList - While parsing a function declarator
6144 /// we found a K&R-style identifier list instead of a typed parameter list.
6146 /// After returning, ParamInfo will hold the parsed parameters.
6148 /// identifier-list: [C99 6.7.5]
6150 /// identifier-list ',' identifier
6152 void Parser::ParseFunctionDeclaratorIdentifierList(
6154 SmallVectorImpl<DeclaratorChunk::ParamInfo> &ParamInfo) {
6155 // If there was no identifier specified for the declarator, either we are in
6156 // an abstract-declarator, or we are in a parameter declarator which was found
6157 // to be abstract. In abstract-declarators, identifier lists are not valid:
6159 if (!D.getIdentifier())
6160 Diag(Tok, diag::ext_ident_list_in_param);
6162 // Maintain an efficient lookup of params we have seen so far.
6163 llvm::SmallSet<const IdentifierInfo*, 16> ParamsSoFar;
6166 // If this isn't an identifier, report the error and skip until ')'.
6167 if (Tok.isNot(tok::identifier)) {
6168 Diag(Tok, diag::err_expected) << tok::identifier;
6169 SkipUntil(tok::r_paren, StopAtSemi | StopBeforeMatch);
6170 // Forget we parsed anything.
6175 IdentifierInfo *ParmII = Tok.getIdentifierInfo();
6177 // Reject 'typedef int y; int test(x, y)', but continue parsing.
6178 if (Actions.getTypeName(*ParmII, Tok.getLocation(), getCurScope()))
6179 Diag(Tok, diag::err_unexpected_typedef_ident) << ParmII;
6181 // Verify that the argument identifier has not already been mentioned.
6182 if (!ParamsSoFar.insert(ParmII).second) {
6183 Diag(Tok, diag::err_param_redefinition) << ParmII;
6185 // Remember this identifier in ParamInfo.
6186 ParamInfo.push_back(DeclaratorChunk::ParamInfo(ParmII,
6191 // Eat the identifier.
6193 // The list continues if we see a comma.
6194 } while (TryConsumeToken(tok::comma));
6197 /// ParseParameterDeclarationClause - Parse a (possibly empty) parameter-list
6198 /// after the opening parenthesis. This function will not parse a K&R-style
6199 /// identifier list.
6201 /// D is the declarator being parsed. If FirstArgAttrs is non-null, then the
6202 /// caller parsed those arguments immediately after the open paren - they should
6203 /// be considered to be part of the first parameter.
6205 /// After returning, ParamInfo will hold the parsed parameters. EllipsisLoc will
6206 /// be the location of the ellipsis, if any was parsed.
6208 /// parameter-type-list: [C99 6.7.5]
6210 /// parameter-list ',' '...'
6211 /// [C++] parameter-list '...'
6213 /// parameter-list: [C99 6.7.5]
6214 /// parameter-declaration
6215 /// parameter-list ',' parameter-declaration
6217 /// parameter-declaration: [C99 6.7.5]
6218 /// declaration-specifiers declarator
6219 /// [C++] declaration-specifiers declarator '=' assignment-expression
6220 /// [C++11] initializer-clause
6221 /// [GNU] declaration-specifiers declarator attributes
6222 /// declaration-specifiers abstract-declarator[opt]
6223 /// [C++] declaration-specifiers abstract-declarator[opt]
6224 /// '=' assignment-expression
6225 /// [GNU] declaration-specifiers abstract-declarator[opt] attributes
6226 /// [C++11] attribute-specifier-seq parameter-declaration
6228 void Parser::ParseParameterDeclarationClause(
6230 ParsedAttributes &FirstArgAttrs,
6231 SmallVectorImpl<DeclaratorChunk::ParamInfo> &ParamInfo,
6232 SourceLocation &EllipsisLoc) {
6234 // FIXME: Issue a diagnostic if we parsed an attribute-specifier-seq
6235 // before deciding this was a parameter-declaration-clause.
6236 if (TryConsumeToken(tok::ellipsis, EllipsisLoc))
6239 // Parse the declaration-specifiers.
6240 // Just use the ParsingDeclaration "scope" of the declarator.
6241 DeclSpec DS(AttrFactory);
6243 // Parse any C++11 attributes.
6244 MaybeParseCXX11Attributes(DS.getAttributes());
6246 // Skip any Microsoft attributes before a param.
6247 MaybeParseMicrosoftAttributes(DS.getAttributes());
6249 SourceLocation DSStart = Tok.getLocation();
6251 // If the caller parsed attributes for the first argument, add them now.
6252 // Take them so that we only apply the attributes to the first parameter.
6253 // FIXME: If we can leave the attributes in the token stream somehow, we can
6254 // get rid of a parameter (FirstArgAttrs) and this statement. It might be
6256 DS.takeAttributesFrom(FirstArgAttrs);
6258 ParseDeclarationSpecifiers(DS);
6261 // Parse the declarator. This is "PrototypeContext" or
6262 // "LambdaExprParameterContext", because we must accept either
6263 // 'declarator' or 'abstract-declarator' here.
6264 Declarator ParmDeclarator(DS,
6265 D.getContext() == Declarator::LambdaExprContext ?
6266 Declarator::LambdaExprParameterContext :
6267 Declarator::PrototypeContext);
6268 ParseDeclarator(ParmDeclarator);
6270 // Parse GNU attributes, if present.
6271 MaybeParseGNUAttributes(ParmDeclarator);
6273 // Remember this parsed parameter in ParamInfo.
6274 IdentifierInfo *ParmII = ParmDeclarator.getIdentifier();
6276 // DefArgToks is used when the parsing of default arguments needs
6278 std::unique_ptr<CachedTokens> DefArgToks;
6280 // If no parameter was specified, verify that *something* was specified,
6281 // otherwise we have a missing type and identifier.
6282 if (DS.isEmpty() && ParmDeclarator.getIdentifier() == nullptr &&
6283 ParmDeclarator.getNumTypeObjects() == 0) {
6284 // Completely missing, emit error.
6285 Diag(DSStart, diag::err_missing_param);
6287 // Otherwise, we have something. Add it and let semantic analysis try
6288 // to grok it and add the result to the ParamInfo we are building.
6290 // Last chance to recover from a misplaced ellipsis in an attempted
6291 // parameter pack declaration.
6292 if (Tok.is(tok::ellipsis) &&
6293 (NextToken().isNot(tok::r_paren) ||
6294 (!ParmDeclarator.getEllipsisLoc().isValid() &&
6295 !Actions.isUnexpandedParameterPackPermitted())) &&
6296 Actions.containsUnexpandedParameterPacks(ParmDeclarator))
6297 DiagnoseMisplacedEllipsisInDeclarator(ConsumeToken(), ParmDeclarator);
6299 // Inform the actions module about the parameter declarator, so it gets
6300 // added to the current scope.
6301 Decl *Param = Actions.ActOnParamDeclarator(getCurScope(), ParmDeclarator);
6302 // Parse the default argument, if any. We parse the default
6303 // arguments in all dialects; the semantic analysis in
6304 // ActOnParamDefaultArgument will reject the default argument in
6306 if (Tok.is(tok::equal)) {
6307 SourceLocation EqualLoc = Tok.getLocation();
6309 // Parse the default argument
6310 if (D.getContext() == Declarator::MemberContext) {
6311 // If we're inside a class definition, cache the tokens
6312 // corresponding to the default argument. We'll actually parse
6313 // them when we see the end of the class definition.
6314 DefArgToks.reset(new CachedTokens);
6316 SourceLocation ArgStartLoc = NextToken().getLocation();
6317 if (!ConsumeAndStoreInitializer(*DefArgToks, CIK_DefaultArgument)) {
6319 Actions.ActOnParamDefaultArgumentError(Param, EqualLoc);
6321 Actions.ActOnParamUnparsedDefaultArgument(Param, EqualLoc,
6328 // The argument isn't actually potentially evaluated unless it is
6330 EnterExpressionEvaluationContext Eval(
6332 Sema::ExpressionEvaluationContext::PotentiallyEvaluatedIfUsed,
6335 ExprResult DefArgResult;
6336 if (getLangOpts().CPlusPlus11 && Tok.is(tok::l_brace)) {
6337 Diag(Tok, diag::warn_cxx98_compat_generalized_initializer_lists);
6338 DefArgResult = ParseBraceInitializer();
6340 DefArgResult = ParseAssignmentExpression();
6341 DefArgResult = Actions.CorrectDelayedTyposInExpr(DefArgResult);
6342 if (DefArgResult.isInvalid()) {
6343 Actions.ActOnParamDefaultArgumentError(Param, EqualLoc);
6344 SkipUntil(tok::comma, tok::r_paren, StopAtSemi | StopBeforeMatch);
6346 // Inform the actions module about the default argument
6347 Actions.ActOnParamDefaultArgument(Param, EqualLoc,
6348 DefArgResult.get());
6353 ParamInfo.push_back(DeclaratorChunk::ParamInfo(ParmII,
6354 ParmDeclarator.getIdentifierLoc(),
6355 Param, std::move(DefArgToks)));
6358 if (TryConsumeToken(tok::ellipsis, EllipsisLoc)) {
6359 if (!getLangOpts().CPlusPlus) {
6360 // We have ellipsis without a preceding ',', which is ill-formed
6361 // in C. Complain and provide the fix.
6362 Diag(EllipsisLoc, diag::err_missing_comma_before_ellipsis)
6363 << FixItHint::CreateInsertion(EllipsisLoc, ", ");
6364 } else if (ParmDeclarator.getEllipsisLoc().isValid() ||
6365 Actions.containsUnexpandedParameterPacks(ParmDeclarator)) {
6366 // It looks like this was supposed to be a parameter pack. Warn and
6367 // point out where the ellipsis should have gone.
6368 SourceLocation ParmEllipsis = ParmDeclarator.getEllipsisLoc();
6369 Diag(EllipsisLoc, diag::warn_misplaced_ellipsis_vararg)
6370 << ParmEllipsis.isValid() << ParmEllipsis;
6371 if (ParmEllipsis.isValid()) {
6373 diag::note_misplaced_ellipsis_vararg_existing_ellipsis);
6375 Diag(ParmDeclarator.getIdentifierLoc(),
6376 diag::note_misplaced_ellipsis_vararg_add_ellipsis)
6377 << FixItHint::CreateInsertion(ParmDeclarator.getIdentifierLoc(),
6379 << !ParmDeclarator.hasName();
6381 Diag(EllipsisLoc, diag::note_misplaced_ellipsis_vararg_add_comma)
6382 << FixItHint::CreateInsertion(EllipsisLoc, ", ");
6385 // We can't have any more parameters after an ellipsis.
6389 // If the next token is a comma, consume it and keep reading arguments.
6390 } while (TryConsumeToken(tok::comma));
6393 /// [C90] direct-declarator '[' constant-expression[opt] ']'
6394 /// [C99] direct-declarator '[' type-qual-list[opt] assignment-expr[opt] ']'
6395 /// [C99] direct-declarator '[' 'static' type-qual-list[opt] assign-expr ']'
6396 /// [C99] direct-declarator '[' type-qual-list 'static' assignment-expr ']'
6397 /// [C99] direct-declarator '[' type-qual-list[opt] '*' ']'
6398 /// [C++11] direct-declarator '[' constant-expression[opt] ']'
6399 /// attribute-specifier-seq[opt]
6400 void Parser::ParseBracketDeclarator(Declarator &D) {
6401 if (CheckProhibitedCXX11Attribute())
6404 BalancedDelimiterTracker T(*this, tok::l_square);
6407 // C array syntax has many features, but by-far the most common is [] and [4].
6408 // This code does a fast path to handle some of the most obvious cases.
6409 if (Tok.getKind() == tok::r_square) {
6411 ParsedAttributes attrs(AttrFactory);
6412 MaybeParseCXX11Attributes(attrs);
6414 // Remember that we parsed the empty array type.
6415 D.AddTypeInfo(DeclaratorChunk::getArray(0, false, false, nullptr,
6416 T.getOpenLocation(),
6417 T.getCloseLocation()),
6418 attrs, T.getCloseLocation());
6420 } else if (Tok.getKind() == tok::numeric_constant &&
6421 GetLookAheadToken(1).is(tok::r_square)) {
6422 // [4] is very common. Parse the numeric constant expression.
6423 ExprResult ExprRes(Actions.ActOnNumericConstant(Tok, getCurScope()));
6427 ParsedAttributes attrs(AttrFactory);
6428 MaybeParseCXX11Attributes(attrs);
6430 // Remember that we parsed a array type, and remember its features.
6431 D.AddTypeInfo(DeclaratorChunk::getArray(0, false, false,
6433 T.getOpenLocation(),
6434 T.getCloseLocation()),
6435 attrs, T.getCloseLocation());
6437 } else if (Tok.getKind() == tok::code_completion) {
6438 Actions.CodeCompleteBracketDeclarator(getCurScope());
6439 return cutOffParsing();
6442 // If valid, this location is the position where we read the 'static' keyword.
6443 SourceLocation StaticLoc;
6444 TryConsumeToken(tok::kw_static, StaticLoc);
6446 // If there is a type-qualifier-list, read it now.
6447 // Type qualifiers in an array subscript are a C99 feature.
6448 DeclSpec DS(AttrFactory);
6449 ParseTypeQualifierListOpt(DS, AR_CXX11AttributesParsed);
6451 // If we haven't already read 'static', check to see if there is one after the
6452 // type-qualifier-list.
6453 if (!StaticLoc.isValid())
6454 TryConsumeToken(tok::kw_static, StaticLoc);
6456 // Handle "direct-declarator [ type-qual-list[opt] * ]".
6457 bool isStar = false;
6458 ExprResult NumElements;
6460 // Handle the case where we have '[*]' as the array size. However, a leading
6461 // star could be the start of an expression, for example 'X[*p + 4]'. Verify
6462 // the token after the star is a ']'. Since stars in arrays are
6463 // infrequent, use of lookahead is not costly here.
6464 if (Tok.is(tok::star) && GetLookAheadToken(1).is(tok::r_square)) {
6465 ConsumeToken(); // Eat the '*'.
6467 if (StaticLoc.isValid()) {
6468 Diag(StaticLoc, diag::err_unspecified_vla_size_with_static);
6469 StaticLoc = SourceLocation(); // Drop the static.
6472 } else if (Tok.isNot(tok::r_square)) {
6473 // Note, in C89, this production uses the constant-expr production instead
6474 // of assignment-expr. The only difference is that assignment-expr allows
6475 // things like '=' and '*='. Sema rejects these in C89 mode because they
6476 // are not i-c-e's, so we don't need to distinguish between the two here.
6478 // Parse the constant-expression or assignment-expression now (depending
6480 if (getLangOpts().CPlusPlus) {
6481 NumElements = ParseConstantExpression();
6483 EnterExpressionEvaluationContext Unevaluated(
6484 Actions, Sema::ExpressionEvaluationContext::ConstantEvaluated);
6486 Actions.CorrectDelayedTyposInExpr(ParseAssignmentExpression());
6489 if (StaticLoc.isValid()) {
6490 Diag(StaticLoc, diag::err_unspecified_size_with_static);
6491 StaticLoc = SourceLocation(); // Drop the static.
6495 // If there was an error parsing the assignment-expression, recover.
6496 if (NumElements.isInvalid()) {
6497 D.setInvalidType(true);
6498 // If the expression was invalid, skip it.
6499 SkipUntil(tok::r_square, StopAtSemi);
6505 MaybeParseCXX11Attributes(DS.getAttributes());
6507 // Remember that we parsed a array type, and remember its features.
6508 D.AddTypeInfo(DeclaratorChunk::getArray(DS.getTypeQualifiers(),
6509 StaticLoc.isValid(), isStar,
6511 T.getOpenLocation(),
6512 T.getCloseLocation()),
6513 DS.getAttributes(), T.getCloseLocation());
6516 /// Diagnose brackets before an identifier.
6517 void Parser::ParseMisplacedBracketDeclarator(Declarator &D) {
6518 assert(Tok.is(tok::l_square) && "Missing opening bracket");
6519 assert(!D.mayOmitIdentifier() && "Declarator cannot omit identifier");
6521 SourceLocation StartBracketLoc = Tok.getLocation();
6522 Declarator TempDeclarator(D.getDeclSpec(), D.getContext());
6524 while (Tok.is(tok::l_square)) {
6525 ParseBracketDeclarator(TempDeclarator);
6528 // Stuff the location of the start of the brackets into the Declarator.
6529 // The diagnostics from ParseDirectDeclarator will make more sense if
6530 // they use this location instead.
6531 if (Tok.is(tok::semi))
6532 D.getName().EndLocation = StartBracketLoc;
6534 SourceLocation SuggestParenLoc = Tok.getLocation();
6536 // Now that the brackets are removed, try parsing the declarator again.
6537 ParseDeclaratorInternal(D, &Parser::ParseDirectDeclarator);
6539 // Something went wrong parsing the brackets, in which case,
6540 // ParseBracketDeclarator has emitted an error, and we don't need to emit
6542 if (TempDeclarator.getNumTypeObjects() == 0)
6545 // Determine if parens will need to be suggested in the diagnostic.
6546 bool NeedParens = false;
6547 if (D.getNumTypeObjects() != 0) {
6548 switch (D.getTypeObject(D.getNumTypeObjects() - 1).Kind) {
6549 case DeclaratorChunk::Pointer:
6550 case DeclaratorChunk::Reference:
6551 case DeclaratorChunk::BlockPointer:
6552 case DeclaratorChunk::MemberPointer:
6553 case DeclaratorChunk::Pipe:
6556 case DeclaratorChunk::Array:
6557 case DeclaratorChunk::Function:
6558 case DeclaratorChunk::Paren:
6564 // Create a DeclaratorChunk for the inserted parens.
6565 ParsedAttributes attrs(AttrFactory);
6566 SourceLocation EndLoc = PP.getLocForEndOfToken(D.getLocEnd());
6567 D.AddTypeInfo(DeclaratorChunk::getParen(SuggestParenLoc, EndLoc), attrs,
6571 // Adding back the bracket info to the end of the Declarator.
6572 for (unsigned i = 0, e = TempDeclarator.getNumTypeObjects(); i < e; ++i) {
6573 const DeclaratorChunk &Chunk = TempDeclarator.getTypeObject(i);
6574 ParsedAttributes attrs(AttrFactory);
6575 attrs.set(Chunk.Common.AttrList);
6576 D.AddTypeInfo(Chunk, attrs, SourceLocation());
6579 // The missing identifier would have been diagnosed in ParseDirectDeclarator.
6580 // If parentheses are required, always suggest them.
6581 if (!D.getIdentifier() && !NeedParens)
6584 SourceLocation EndBracketLoc = TempDeclarator.getLocEnd();
6586 // Generate the move bracket error message.
6587 SourceRange BracketRange(StartBracketLoc, EndBracketLoc);
6588 SourceLocation EndLoc = PP.getLocForEndOfToken(D.getLocEnd());
6591 Diag(EndLoc, diag::err_brackets_go_after_unqualified_id)
6592 << getLangOpts().CPlusPlus
6593 << FixItHint::CreateInsertion(SuggestParenLoc, "(")
6594 << FixItHint::CreateInsertion(EndLoc, ")")
6595 << FixItHint::CreateInsertionFromRange(
6596 EndLoc, CharSourceRange(BracketRange, true))
6597 << FixItHint::CreateRemoval(BracketRange);
6599 Diag(EndLoc, diag::err_brackets_go_after_unqualified_id)
6600 << getLangOpts().CPlusPlus
6601 << FixItHint::CreateInsertionFromRange(
6602 EndLoc, CharSourceRange(BracketRange, true))
6603 << FixItHint::CreateRemoval(BracketRange);
6607 /// [GNU] typeof-specifier:
6608 /// typeof ( expressions )
6609 /// typeof ( type-name )
6610 /// [GNU/C++] typeof unary-expression
6612 void Parser::ParseTypeofSpecifier(DeclSpec &DS) {
6613 assert(Tok.is(tok::kw_typeof) && "Not a typeof specifier");
6615 SourceLocation StartLoc = ConsumeToken();
6617 const bool hasParens = Tok.is(tok::l_paren);
6619 EnterExpressionEvaluationContext Unevaluated(
6620 Actions, Sema::ExpressionEvaluationContext::Unevaluated,
6621 Sema::ReuseLambdaContextDecl);
6625 SourceRange CastRange;
6626 ExprResult Operand = Actions.CorrectDelayedTyposInExpr(
6627 ParseExprAfterUnaryExprOrTypeTrait(OpTok, isCastExpr, CastTy, CastRange));
6629 DS.setTypeofParensRange(CastRange);
6631 if (CastRange.getEnd().isInvalid())
6632 // FIXME: Not accurate, the range gets one token more than it should.
6633 DS.SetRangeEnd(Tok.getLocation());
6635 DS.SetRangeEnd(CastRange.getEnd());
6639 DS.SetTypeSpecError();
6643 const char *PrevSpec = nullptr;
6645 // Check for duplicate type specifiers (e.g. "int typeof(int)").
6646 if (DS.SetTypeSpecType(DeclSpec::TST_typeofType, StartLoc, PrevSpec,
6648 Actions.getASTContext().getPrintingPolicy()))
6649 Diag(StartLoc, DiagID) << PrevSpec;
6653 // If we get here, the operand to the typeof was an expression.
6654 if (Operand.isInvalid()) {
6655 DS.SetTypeSpecError();
6659 // We might need to transform the operand if it is potentially evaluated.
6660 Operand = Actions.HandleExprEvaluationContextForTypeof(Operand.get());
6661 if (Operand.isInvalid()) {
6662 DS.SetTypeSpecError();
6666 const char *PrevSpec = nullptr;
6668 // Check for duplicate type specifiers (e.g. "int typeof(int)").
6669 if (DS.SetTypeSpecType(DeclSpec::TST_typeofExpr, StartLoc, PrevSpec,
6670 DiagID, Operand.get(),
6671 Actions.getASTContext().getPrintingPolicy()))
6672 Diag(StartLoc, DiagID) << PrevSpec;
6675 /// [C11] atomic-specifier:
6676 /// _Atomic ( type-name )
6678 void Parser::ParseAtomicSpecifier(DeclSpec &DS) {
6679 assert(Tok.is(tok::kw__Atomic) && NextToken().is(tok::l_paren) &&
6680 "Not an atomic specifier");
6682 SourceLocation StartLoc = ConsumeToken();
6683 BalancedDelimiterTracker T(*this, tok::l_paren);
6684 if (T.consumeOpen())
6687 TypeResult Result = ParseTypeName();
6688 if (Result.isInvalid()) {
6689 SkipUntil(tok::r_paren, StopAtSemi);
6696 if (T.getCloseLocation().isInvalid())
6699 DS.setTypeofParensRange(T.getRange());
6700 DS.SetRangeEnd(T.getCloseLocation());
6702 const char *PrevSpec = nullptr;
6704 if (DS.SetTypeSpecType(DeclSpec::TST_atomic, StartLoc, PrevSpec,
6705 DiagID, Result.get(),
6706 Actions.getASTContext().getPrintingPolicy()))
6707 Diag(StartLoc, DiagID) << PrevSpec;
6710 /// TryAltiVecVectorTokenOutOfLine - Out of line body that should only be called
6711 /// from TryAltiVecVectorToken.
6712 bool Parser::TryAltiVecVectorTokenOutOfLine() {
6713 Token Next = NextToken();
6714 switch (Next.getKind()) {
6715 default: return false;
6718 case tok::kw_signed:
6719 case tok::kw_unsigned:
6724 case tok::kw_double:
6726 case tok::kw___bool:
6727 case tok::kw___pixel:
6728 Tok.setKind(tok::kw___vector);
6730 case tok::identifier:
6731 if (Next.getIdentifierInfo() == Ident_pixel) {
6732 Tok.setKind(tok::kw___vector);
6735 if (Next.getIdentifierInfo() == Ident_bool) {
6736 Tok.setKind(tok::kw___vector);
6743 bool Parser::TryAltiVecTokenOutOfLine(DeclSpec &DS, SourceLocation Loc,
6744 const char *&PrevSpec, unsigned &DiagID,
6746 const PrintingPolicy &Policy = Actions.getASTContext().getPrintingPolicy();
6747 if (Tok.getIdentifierInfo() == Ident_vector) {
6748 Token Next = NextToken();
6749 switch (Next.getKind()) {
6752 case tok::kw_signed:
6753 case tok::kw_unsigned:
6758 case tok::kw_double:
6760 case tok::kw___bool:
6761 case tok::kw___pixel:
6762 isInvalid = DS.SetTypeAltiVecVector(true, Loc, PrevSpec, DiagID, Policy);
6764 case tok::identifier:
6765 if (Next.getIdentifierInfo() == Ident_pixel) {
6766 isInvalid = DS.SetTypeAltiVecVector(true, Loc, PrevSpec, DiagID,Policy);
6769 if (Next.getIdentifierInfo() == Ident_bool) {
6770 isInvalid = DS.SetTypeAltiVecVector(true, Loc, PrevSpec, DiagID,Policy);
6777 } else if ((Tok.getIdentifierInfo() == Ident_pixel) &&
6778 DS.isTypeAltiVecVector()) {
6779 isInvalid = DS.SetTypeAltiVecPixel(true, Loc, PrevSpec, DiagID, Policy);
6781 } else if ((Tok.getIdentifierInfo() == Ident_bool) &&
6782 DS.isTypeAltiVecVector()) {
6783 isInvalid = DS.SetTypeAltiVecBool(true, Loc, PrevSpec, DiagID, Policy);