1 //===--- Parser.h - C Language Parser ---------------------------*- C++ -*-===//
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
7 //===----------------------------------------------------------------------===//
9 // This file defines the Parser interface.
11 //===----------------------------------------------------------------------===//
13 #ifndef LLVM_CLANG_PARSE_PARSER_H
14 #define LLVM_CLANG_PARSE_PARSER_H
16 #include "clang/AST/OpenMPClause.h"
17 #include "clang/AST/Availability.h"
18 #include "clang/Basic/BitmaskEnum.h"
19 #include "clang/Basic/OpenMPKinds.h"
20 #include "clang/Basic/OperatorPrecedence.h"
21 #include "clang/Basic/Specifiers.h"
22 #include "clang/Lex/CodeCompletionHandler.h"
23 #include "clang/Lex/Preprocessor.h"
24 #include "clang/Sema/DeclSpec.h"
25 #include "clang/Sema/Sema.h"
26 #include "llvm/ADT/SmallVector.h"
27 #include "llvm/Support/Compiler.h"
28 #include "llvm/Support/PrettyStackTrace.h"
29 #include "llvm/Support/SaveAndRestore.h"
36 class BalancedDelimiterTracker;
37 class CorrectionCandidateCallback;
39 class DiagnosticBuilder;
42 class ParsingDeclRAIIObject;
43 class ParsingDeclSpec;
44 class ParsingDeclarator;
45 class ParsingFieldDeclarator;
46 class ColonProtectionRAIIObject;
47 class InMessageExpressionRAIIObject;
48 class PoisonSEHIdentifiersRAIIObject;
50 class ObjCTypeParamList;
51 class ObjCTypeParameter;
53 /// Parser - This implements a parser for the C family of languages. After
54 /// parsing units of the grammar, productions are invoked to handle whatever has
57 class Parser : public CodeCompletionHandler {
58 friend class ColonProtectionRAIIObject;
59 friend class InMessageExpressionRAIIObject;
60 friend class PoisonSEHIdentifiersRAIIObject;
61 friend class ObjCDeclContextSwitch;
62 friend class ParenBraceBracketBalancer;
63 friend class BalancedDelimiterTracker;
67 /// Tok - The current token we are peeking ahead. All parsing methods assume
68 /// that this is valid.
71 // PrevTokLocation - The location of the token we previously
72 // consumed. This token is used for diagnostics where we expected to
73 // see a token following another token (e.g., the ';' at the end of
75 SourceLocation PrevTokLocation;
77 /// Tracks an expected type for the current token when parsing an expression.
78 /// Used by code completion for ranking.
79 PreferredTypeBuilder PreferredType;
81 unsigned short ParenCount = 0, BracketCount = 0, BraceCount = 0;
82 unsigned short MisplacedModuleBeginCount = 0;
84 /// Actions - These are the callbacks we invoke as we parse various constructs
88 DiagnosticsEngine &Diags;
90 /// ScopeCache - Cache scopes to reduce malloc traffic.
91 enum { ScopeCacheSize = 16 };
92 unsigned NumCachedScopes;
93 Scope *ScopeCache[ScopeCacheSize];
95 /// Identifiers used for SEH handling in Borland. These are only
96 /// allowed in particular circumstances
98 IdentifierInfo *Ident__exception_code,
99 *Ident___exception_code,
100 *Ident_GetExceptionCode;
101 // __except filter expression
102 IdentifierInfo *Ident__exception_info,
103 *Ident___exception_info,
104 *Ident_GetExceptionInfo;
106 IdentifierInfo *Ident__abnormal_termination,
107 *Ident___abnormal_termination,
108 *Ident_AbnormalTermination;
110 /// Contextual keywords for Microsoft extensions.
111 IdentifierInfo *Ident__except;
112 mutable IdentifierInfo *Ident_sealed;
114 /// Ident_super - IdentifierInfo for "super", to support fast
116 IdentifierInfo *Ident_super;
117 /// Ident_vector, Ident_bool - cached IdentifierInfos for "vector" and
118 /// "bool" fast comparison. Only present if AltiVec or ZVector are enabled.
119 IdentifierInfo *Ident_vector;
120 IdentifierInfo *Ident_bool;
121 /// Ident_pixel - cached IdentifierInfos for "pixel" fast comparison.
122 /// Only present if AltiVec enabled.
123 IdentifierInfo *Ident_pixel;
125 /// Objective-C contextual keywords.
126 IdentifierInfo *Ident_instancetype;
128 /// Identifier for "introduced".
129 IdentifierInfo *Ident_introduced;
131 /// Identifier for "deprecated".
132 IdentifierInfo *Ident_deprecated;
134 /// Identifier for "obsoleted".
135 IdentifierInfo *Ident_obsoleted;
137 /// Identifier for "unavailable".
138 IdentifierInfo *Ident_unavailable;
140 /// Identifier for "message".
141 IdentifierInfo *Ident_message;
143 /// Identifier for "strict".
144 IdentifierInfo *Ident_strict;
146 /// Identifier for "replacement".
147 IdentifierInfo *Ident_replacement;
149 /// Identifiers used by the 'external_source_symbol' attribute.
150 IdentifierInfo *Ident_language, *Ident_defined_in,
151 *Ident_generated_declaration;
153 /// C++11 contextual keywords.
154 mutable IdentifierInfo *Ident_final;
155 mutable IdentifierInfo *Ident_GNU_final;
156 mutable IdentifierInfo *Ident_override;
158 // C++2a contextual keywords.
159 mutable IdentifierInfo *Ident_import;
160 mutable IdentifierInfo *Ident_module;
162 // C++ type trait keywords that can be reverted to identifiers and still be
163 // used as type traits.
164 llvm::SmallDenseMap<IdentifierInfo *, tok::TokenKind> RevertibleTypeTraits;
166 std::unique_ptr<PragmaHandler> AlignHandler;
167 std::unique_ptr<PragmaHandler> GCCVisibilityHandler;
168 std::unique_ptr<PragmaHandler> OptionsHandler;
169 std::unique_ptr<PragmaHandler> PackHandler;
170 std::unique_ptr<PragmaHandler> MSStructHandler;
171 std::unique_ptr<PragmaHandler> UnusedHandler;
172 std::unique_ptr<PragmaHandler> WeakHandler;
173 std::unique_ptr<PragmaHandler> RedefineExtnameHandler;
174 std::unique_ptr<PragmaHandler> FPContractHandler;
175 std::unique_ptr<PragmaHandler> OpenCLExtensionHandler;
176 std::unique_ptr<PragmaHandler> OpenMPHandler;
177 std::unique_ptr<PragmaHandler> PCSectionHandler;
178 std::unique_ptr<PragmaHandler> MSCommentHandler;
179 std::unique_ptr<PragmaHandler> MSDetectMismatchHandler;
180 std::unique_ptr<PragmaHandler> MSPointersToMembers;
181 std::unique_ptr<PragmaHandler> MSVtorDisp;
182 std::unique_ptr<PragmaHandler> MSInitSeg;
183 std::unique_ptr<PragmaHandler> MSDataSeg;
184 std::unique_ptr<PragmaHandler> MSBSSSeg;
185 std::unique_ptr<PragmaHandler> MSConstSeg;
186 std::unique_ptr<PragmaHandler> MSCodeSeg;
187 std::unique_ptr<PragmaHandler> MSSection;
188 std::unique_ptr<PragmaHandler> MSRuntimeChecks;
189 std::unique_ptr<PragmaHandler> MSIntrinsic;
190 std::unique_ptr<PragmaHandler> MSOptimize;
191 std::unique_ptr<PragmaHandler> CUDAForceHostDeviceHandler;
192 std::unique_ptr<PragmaHandler> OptimizeHandler;
193 std::unique_ptr<PragmaHandler> LoopHintHandler;
194 std::unique_ptr<PragmaHandler> UnrollHintHandler;
195 std::unique_ptr<PragmaHandler> NoUnrollHintHandler;
196 std::unique_ptr<PragmaHandler> UnrollAndJamHintHandler;
197 std::unique_ptr<PragmaHandler> NoUnrollAndJamHintHandler;
198 std::unique_ptr<PragmaHandler> FPHandler;
199 std::unique_ptr<PragmaHandler> STDCFENVHandler;
200 std::unique_ptr<PragmaHandler> STDCCXLIMITHandler;
201 std::unique_ptr<PragmaHandler> STDCUnknownHandler;
202 std::unique_ptr<PragmaHandler> AttributePragmaHandler;
204 std::unique_ptr<CommentHandler> CommentSemaHandler;
206 /// Whether the '>' token acts as an operator or not. This will be
207 /// true except when we are parsing an expression within a C++
208 /// template argument list, where the '>' closes the template
210 bool GreaterThanIsOperator;
212 /// ColonIsSacred - When this is false, we aggressively try to recover from
213 /// code like "foo : bar" as if it were a typo for "foo :: bar". This is not
214 /// safe in case statements and a few other things. This is managed by the
215 /// ColonProtectionRAIIObject RAII object.
218 /// When true, we are directly inside an Objective-C message
221 /// This is managed by the \c InMessageExpressionRAIIObject class, and
222 /// should not be set directly.
223 bool InMessageExpression;
225 /// Gets set to true after calling ProduceSignatureHelp, it is for a
226 /// workaround to make sure ProduceSignatureHelp is only called at the deepest
228 bool CalledSignatureHelp = false;
230 /// The "depth" of the template parameters currently being parsed.
231 unsigned TemplateParameterDepth;
233 /// RAII class that manages the template parameter depth.
234 class TemplateParameterDepthRAII {
236 unsigned AddedLevels;
238 explicit TemplateParameterDepthRAII(unsigned &Depth)
239 : Depth(Depth), AddedLevels(0) {}
241 ~TemplateParameterDepthRAII() {
242 Depth -= AddedLevels;
249 void addDepth(unsigned D) {
253 void setAddedDepth(unsigned D) {
254 Depth = Depth - AddedLevels + D;
258 unsigned getDepth() const { return Depth; }
259 unsigned getOriginalDepth() const { return Depth - AddedLevels; }
262 /// Factory object for creating ParsedAttr objects.
263 AttributeFactory AttrFactory;
265 /// Gathers and cleans up TemplateIdAnnotations when parsing of a
266 /// top-level declaration is finished.
267 SmallVector<TemplateIdAnnotation *, 16> TemplateIds;
269 /// Identifiers which have been declared within a tentative parse.
270 SmallVector<IdentifierInfo *, 8> TentativelyDeclaredIdentifiers;
272 /// Tracker for '<' tokens that might have been intended to be treated as an
273 /// angle bracket instead of a less-than comparison.
275 /// This happens when the user intends to form a template-id, but typoes the
276 /// template-name or forgets a 'template' keyword for a dependent template
279 /// We track these locations from the point where we see a '<' with a
280 /// name-like expression on its left until we see a '>' or '>>' that might
282 struct AngleBracketTracker {
283 /// Flags used to rank candidate template names when there is more than one
285 enum Priority : unsigned short {
286 /// A non-dependent name that is a potential typo for a template name.
288 /// A dependent name that might instantiate to a template-name.
291 /// A space appears before the '<' token.
292 SpaceBeforeLess = 0x0,
293 /// No space before the '<' token
294 NoSpaceBeforeLess = 0x1,
296 LLVM_MARK_AS_BITMASK_ENUM(/*LargestValue*/ DependentName)
301 SourceLocation LessLoc;
302 AngleBracketTracker::Priority Priority;
303 unsigned short ParenCount, BracketCount, BraceCount;
305 bool isActive(Parser &P) const {
306 return P.ParenCount == ParenCount && P.BracketCount == BracketCount &&
307 P.BraceCount == BraceCount;
310 bool isActiveOrNested(Parser &P) const {
311 return isActive(P) || P.ParenCount > ParenCount ||
312 P.BracketCount > BracketCount || P.BraceCount > BraceCount;
316 SmallVector<Loc, 8> Locs;
318 /// Add an expression that might have been intended to be a template name.
319 /// In the case of ambiguity, we arbitrarily select the innermost such
320 /// expression, for example in 'foo < bar < baz', 'bar' is the current
321 /// candidate. No attempt is made to track that 'foo' is also a candidate
322 /// for the case where we see a second suspicious '>' token.
323 void add(Parser &P, Expr *TemplateName, SourceLocation LessLoc,
325 if (!Locs.empty() && Locs.back().isActive(P)) {
326 if (Locs.back().Priority <= Prio) {
327 Locs.back().TemplateName = TemplateName;
328 Locs.back().LessLoc = LessLoc;
329 Locs.back().Priority = Prio;
332 Locs.push_back({TemplateName, LessLoc, Prio,
333 P.ParenCount, P.BracketCount, P.BraceCount});
337 /// Mark the current potential missing template location as having been
338 /// handled (this happens if we pass a "corresponding" '>' or '>>' token
339 /// or leave a bracket scope).
340 void clear(Parser &P) {
341 while (!Locs.empty() && Locs.back().isActiveOrNested(P))
345 /// Get the current enclosing expression that might hve been intended to be
347 Loc *getCurrent(Parser &P) {
348 if (!Locs.empty() && Locs.back().isActive(P))
354 AngleBracketTracker AngleBrackets;
356 IdentifierInfo *getSEHExceptKeyword();
358 /// True if we are within an Objective-C container while parsing C-like decls.
360 /// This is necessary because Sema thinks we have left the container
361 /// to parse the C-like decls, meaning Actions.getObjCDeclContext() will
363 bool ParsingInObjCContainer;
365 /// Whether to skip parsing of function bodies.
367 /// This option can be used, for example, to speed up searches for
368 /// declarations/definitions when indexing.
369 bool SkipFunctionBodies;
371 /// The location of the expression statement that is being parsed right now.
372 /// Used to determine if an expression that is being parsed is a statement or
373 /// just a regular sub-expression.
374 SourceLocation ExprStatementTokLoc;
376 /// Flags describing a context in which we're parsing a statement.
377 enum class ParsedStmtContext {
378 /// This context permits declarations in language modes where declarations
379 /// are not statements.
380 AllowDeclarationsInC = 0x1,
381 /// This context permits standalone OpenMP directives.
382 AllowStandaloneOpenMPDirectives = 0x2,
383 /// This context is at the top level of a GNU statement expression.
386 /// The context of a regular substatement.
388 /// The context of a compound-statement.
389 Compound = AllowDeclarationsInC | AllowStandaloneOpenMPDirectives,
391 LLVM_MARK_AS_BITMASK_ENUM(InStmtExpr)
394 /// Act on an expression statement that might be the last statement in a
395 /// GNU statement expression. Checks whether we are actually at the end of
396 /// a statement expression and builds a suitable expression statement.
397 StmtResult handleExprStmt(ExprResult E, ParsedStmtContext StmtCtx);
400 Parser(Preprocessor &PP, Sema &Actions, bool SkipFunctionBodies);
403 const LangOptions &getLangOpts() const { return PP.getLangOpts(); }
404 const TargetInfo &getTargetInfo() const { return PP.getTargetInfo(); }
405 Preprocessor &getPreprocessor() const { return PP; }
406 Sema &getActions() const { return Actions; }
407 AttributeFactory &getAttrFactory() { return AttrFactory; }
409 const Token &getCurToken() const { return Tok; }
410 Scope *getCurScope() const { return Actions.getCurScope(); }
411 void incrementMSManglingNumber() const {
412 return Actions.incrementMSManglingNumber();
415 Decl *getObjCDeclContext() const { return Actions.getObjCDeclContext(); }
417 // Type forwarding. All of these are statically 'void*', but they may all be
418 // different actual classes based on the actions in place.
419 typedef OpaquePtr<DeclGroupRef> DeclGroupPtrTy;
420 typedef OpaquePtr<TemplateName> TemplateTy;
422 typedef SmallVector<TemplateParameterList *, 4> TemplateParameterLists;
424 typedef Sema::FullExprArg FullExprArg;
428 /// Initialize - Warm up the parser.
432 /// Parse the first top-level declaration in a translation unit.
433 bool ParseFirstTopLevelDecl(DeclGroupPtrTy &Result);
435 /// ParseTopLevelDecl - Parse one top-level declaration. Returns true if
436 /// the EOF was encountered.
437 bool ParseTopLevelDecl(DeclGroupPtrTy &Result, bool IsFirstDecl = false);
438 bool ParseTopLevelDecl() {
439 DeclGroupPtrTy Result;
440 return ParseTopLevelDecl(Result);
443 /// ConsumeToken - Consume the current 'peek token' and lex the next one.
444 /// This does not work with special tokens: string literals, code completion,
445 /// annotation tokens and balanced tokens must be handled using the specific
447 /// Returns the location of the consumed token.
448 SourceLocation ConsumeToken() {
449 assert(!isTokenSpecial() &&
450 "Should consume special tokens with Consume*Token");
451 PrevTokLocation = Tok.getLocation();
453 return PrevTokLocation;
456 bool TryConsumeToken(tok::TokenKind Expected) {
457 if (Tok.isNot(Expected))
459 assert(!isTokenSpecial() &&
460 "Should consume special tokens with Consume*Token");
461 PrevTokLocation = Tok.getLocation();
466 bool TryConsumeToken(tok::TokenKind Expected, SourceLocation &Loc) {
467 if (!TryConsumeToken(Expected))
469 Loc = PrevTokLocation;
473 /// ConsumeAnyToken - Dispatch to the right Consume* method based on the
474 /// current token type. This should only be used in cases where the type of
475 /// the token really isn't known, e.g. in error recovery.
476 SourceLocation ConsumeAnyToken(bool ConsumeCodeCompletionTok = false) {
478 return ConsumeParen();
479 if (isTokenBracket())
480 return ConsumeBracket();
482 return ConsumeBrace();
483 if (isTokenStringLiteral())
484 return ConsumeStringToken();
485 if (Tok.is(tok::code_completion))
486 return ConsumeCodeCompletionTok ? ConsumeCodeCompletionToken()
487 : handleUnexpectedCodeCompletionToken();
488 if (Tok.isAnnotation())
489 return ConsumeAnnotationToken();
490 return ConsumeToken();
494 SourceLocation getEndOfPreviousToken() {
495 return PP.getLocForEndOfToken(PrevTokLocation);
498 /// Retrieve the underscored keyword (_Nonnull, _Nullable) that corresponds
499 /// to the given nullability kind.
500 IdentifierInfo *getNullabilityKeyword(NullabilityKind nullability) {
501 return Actions.getNullabilityKeyword(nullability);
505 //===--------------------------------------------------------------------===//
506 // Low-Level token peeking and consumption methods.
509 /// isTokenParen - Return true if the cur token is '(' or ')'.
510 bool isTokenParen() const {
511 return Tok.isOneOf(tok::l_paren, tok::r_paren);
513 /// isTokenBracket - Return true if the cur token is '[' or ']'.
514 bool isTokenBracket() const {
515 return Tok.isOneOf(tok::l_square, tok::r_square);
517 /// isTokenBrace - Return true if the cur token is '{' or '}'.
518 bool isTokenBrace() const {
519 return Tok.isOneOf(tok::l_brace, tok::r_brace);
521 /// isTokenStringLiteral - True if this token is a string-literal.
522 bool isTokenStringLiteral() const {
523 return tok::isStringLiteral(Tok.getKind());
525 /// isTokenSpecial - True if this token requires special consumption methods.
526 bool isTokenSpecial() const {
527 return isTokenStringLiteral() || isTokenParen() || isTokenBracket() ||
528 isTokenBrace() || Tok.is(tok::code_completion) || Tok.isAnnotation();
531 /// Returns true if the current token is '=' or is a type of '='.
532 /// For typos, give a fixit to '='
533 bool isTokenEqualOrEqualTypo();
535 /// Return the current token to the token stream and make the given
536 /// token the current token.
537 void UnconsumeToken(Token &Consumed) {
539 PP.EnterToken(Consumed, /*IsReinject*/true);
541 PP.EnterToken(Next, /*IsReinject*/true);
544 SourceLocation ConsumeAnnotationToken() {
545 assert(Tok.isAnnotation() && "wrong consume method");
546 SourceLocation Loc = Tok.getLocation();
547 PrevTokLocation = Tok.getAnnotationEndLoc();
552 /// ConsumeParen - This consume method keeps the paren count up-to-date.
554 SourceLocation ConsumeParen() {
555 assert(isTokenParen() && "wrong consume method");
556 if (Tok.getKind() == tok::l_paren)
558 else if (ParenCount) {
559 AngleBrackets.clear(*this);
560 --ParenCount; // Don't let unbalanced )'s drive the count negative.
562 PrevTokLocation = Tok.getLocation();
564 return PrevTokLocation;
567 /// ConsumeBracket - This consume method keeps the bracket count up-to-date.
569 SourceLocation ConsumeBracket() {
570 assert(isTokenBracket() && "wrong consume method");
571 if (Tok.getKind() == tok::l_square)
573 else if (BracketCount) {
574 AngleBrackets.clear(*this);
575 --BracketCount; // Don't let unbalanced ]'s drive the count negative.
578 PrevTokLocation = Tok.getLocation();
580 return PrevTokLocation;
583 /// ConsumeBrace - This consume method keeps the brace count up-to-date.
585 SourceLocation ConsumeBrace() {
586 assert(isTokenBrace() && "wrong consume method");
587 if (Tok.getKind() == tok::l_brace)
589 else if (BraceCount) {
590 AngleBrackets.clear(*this);
591 --BraceCount; // Don't let unbalanced }'s drive the count negative.
594 PrevTokLocation = Tok.getLocation();
596 return PrevTokLocation;
599 /// ConsumeStringToken - Consume the current 'peek token', lexing a new one
600 /// and returning the token kind. This method is specific to strings, as it
601 /// handles string literal concatenation, as per C99 5.1.1.2, translation
603 SourceLocation ConsumeStringToken() {
604 assert(isTokenStringLiteral() &&
605 "Should only consume string literals with this method");
606 PrevTokLocation = Tok.getLocation();
608 return PrevTokLocation;
611 /// Consume the current code-completion token.
613 /// This routine can be called to consume the code-completion token and
614 /// continue processing in special cases where \c cutOffParsing() isn't
615 /// desired, such as token caching or completion with lookahead.
616 SourceLocation ConsumeCodeCompletionToken() {
617 assert(Tok.is(tok::code_completion));
618 PrevTokLocation = Tok.getLocation();
620 return PrevTokLocation;
623 ///\ brief When we are consuming a code-completion token without having
624 /// matched specific position in the grammar, provide code-completion results
625 /// based on context.
627 /// \returns the source location of the code-completion token.
628 SourceLocation handleUnexpectedCodeCompletionToken();
630 /// Abruptly cut off parsing; mainly used when we have reached the
631 /// code-completion point.
632 void cutOffParsing() {
633 if (PP.isCodeCompletionEnabled())
634 PP.setCodeCompletionReached();
635 // Cut off parsing by acting as if we reached the end-of-file.
636 Tok.setKind(tok::eof);
639 /// Determine if we're at the end of the file or at a transition
642 tok::TokenKind Kind = Tok.getKind();
643 return Kind == tok::eof || Kind == tok::annot_module_begin ||
644 Kind == tok::annot_module_end || Kind == tok::annot_module_include;
647 /// Checks if the \p Level is valid for use in a fold expression.
648 bool isFoldOperator(prec::Level Level) const;
650 /// Checks if the \p Kind is a valid operator for fold expressions.
651 bool isFoldOperator(tok::TokenKind Kind) const;
653 /// Initialize all pragma handlers.
654 void initializePragmaHandlers();
656 /// Destroy and reset all pragma handlers.
657 void resetPragmaHandlers();
659 /// Handle the annotation token produced for #pragma unused(...)
660 void HandlePragmaUnused();
662 /// Handle the annotation token produced for
663 /// #pragma GCC visibility...
664 void HandlePragmaVisibility();
666 /// Handle the annotation token produced for
668 void HandlePragmaPack();
670 /// Handle the annotation token produced for
671 /// #pragma ms_struct...
672 void HandlePragmaMSStruct();
674 /// Handle the annotation token produced for
675 /// #pragma comment...
676 void HandlePragmaMSComment();
678 void HandlePragmaMSPointersToMembers();
680 void HandlePragmaMSVtorDisp();
682 void HandlePragmaMSPragma();
683 bool HandlePragmaMSSection(StringRef PragmaName,
684 SourceLocation PragmaLocation);
685 bool HandlePragmaMSSegment(StringRef PragmaName,
686 SourceLocation PragmaLocation);
687 bool HandlePragmaMSInitSeg(StringRef PragmaName,
688 SourceLocation PragmaLocation);
690 /// Handle the annotation token produced for
692 void HandlePragmaAlign();
694 /// Handle the annotation token produced for
695 /// #pragma clang __debug dump...
696 void HandlePragmaDump();
698 /// Handle the annotation token produced for
699 /// #pragma weak id...
700 void HandlePragmaWeak();
702 /// Handle the annotation token produced for
703 /// #pragma weak id = id...
704 void HandlePragmaWeakAlias();
706 /// Handle the annotation token produced for
707 /// #pragma redefine_extname...
708 void HandlePragmaRedefineExtname();
710 /// Handle the annotation token produced for
711 /// #pragma STDC FP_CONTRACT...
712 void HandlePragmaFPContract();
714 /// Handle the annotation token produced for
715 /// #pragma STDC FENV_ACCESS...
716 void HandlePragmaFEnvAccess();
718 /// \brief Handle the annotation token produced for
719 /// #pragma clang fp ...
720 void HandlePragmaFP();
722 /// Handle the annotation token produced for
723 /// #pragma OPENCL EXTENSION...
724 void HandlePragmaOpenCLExtension();
726 /// Handle the annotation token produced for
727 /// #pragma clang __debug captured
728 StmtResult HandlePragmaCaptured();
730 /// Handle the annotation token produced for
731 /// #pragma clang loop and #pragma unroll.
732 bool HandlePragmaLoopHint(LoopHint &Hint);
734 bool ParsePragmaAttributeSubjectMatchRuleSet(
735 attr::ParsedSubjectMatchRuleSet &SubjectMatchRules,
736 SourceLocation &AnyLoc, SourceLocation &LastMatchRuleEndLoc);
738 void HandlePragmaAttribute();
740 /// GetLookAheadToken - This peeks ahead N tokens and returns that token
741 /// without consuming any tokens. LookAhead(0) returns 'Tok', LookAhead(1)
742 /// returns the token after Tok, etc.
744 /// Note that this differs from the Preprocessor's LookAhead method, because
745 /// the Parser always has one token lexed that the preprocessor doesn't.
747 const Token &GetLookAheadToken(unsigned N) {
748 if (N == 0 || Tok.is(tok::eof)) return Tok;
749 return PP.LookAhead(N-1);
753 /// NextToken - This peeks ahead one token and returns it without
755 const Token &NextToken() {
756 return PP.LookAhead(0);
759 /// getTypeAnnotation - Read a parsed type out of an annotation token.
760 static ParsedType getTypeAnnotation(const Token &Tok) {
761 return ParsedType::getFromOpaquePtr(Tok.getAnnotationValue());
765 static void setTypeAnnotation(Token &Tok, ParsedType T) {
766 Tok.setAnnotationValue(T.getAsOpaquePtr());
769 /// Read an already-translated primary expression out of an annotation
771 static ExprResult getExprAnnotation(const Token &Tok) {
772 return ExprResult::getFromOpaquePointer(Tok.getAnnotationValue());
775 /// Set the primary expression corresponding to the given annotation
777 static void setExprAnnotation(Token &Tok, ExprResult ER) {
778 Tok.setAnnotationValue(ER.getAsOpaquePointer());
782 // If NeedType is true, then TryAnnotateTypeOrScopeToken will try harder to
783 // find a type name by attempting typo correction.
784 bool TryAnnotateTypeOrScopeToken();
785 bool TryAnnotateTypeOrScopeTokenAfterScopeSpec(CXXScopeSpec &SS,
787 bool TryAnnotateCXXScopeToken(bool EnteringContext = false);
790 enum AnnotatedNameKind {
791 /// Annotation has failed and emitted an error.
793 /// The identifier is a tentatively-declared name.
795 /// The identifier is a template name. FIXME: Add an annotation for that.
797 /// The identifier can't be resolved.
799 /// Annotation was successful.
802 AnnotatedNameKind TryAnnotateName(bool IsAddressOfOperand,
803 CorrectionCandidateCallback *CCC = nullptr);
805 /// Push a tok::annot_cxxscope token onto the token stream.
806 void AnnotateScopeToken(CXXScopeSpec &SS, bool IsNewAnnotation);
808 /// TryAltiVecToken - Check for context-sensitive AltiVec identifier tokens,
809 /// replacing them with the non-context-sensitive keywords. This returns
810 /// true if the token was replaced.
811 bool TryAltiVecToken(DeclSpec &DS, SourceLocation Loc,
812 const char *&PrevSpec, unsigned &DiagID,
814 if (!getLangOpts().AltiVec && !getLangOpts().ZVector)
817 if (Tok.getIdentifierInfo() != Ident_vector &&
818 Tok.getIdentifierInfo() != Ident_bool &&
819 (!getLangOpts().AltiVec || Tok.getIdentifierInfo() != Ident_pixel))
822 return TryAltiVecTokenOutOfLine(DS, Loc, PrevSpec, DiagID, isInvalid);
825 /// TryAltiVecVectorToken - Check for context-sensitive AltiVec vector
826 /// identifier token, replacing it with the non-context-sensitive __vector.
827 /// This returns true if the token was replaced.
828 bool TryAltiVecVectorToken() {
829 if ((!getLangOpts().AltiVec && !getLangOpts().ZVector) ||
830 Tok.getIdentifierInfo() != Ident_vector) return false;
831 return TryAltiVecVectorTokenOutOfLine();
834 bool TryAltiVecVectorTokenOutOfLine();
835 bool TryAltiVecTokenOutOfLine(DeclSpec &DS, SourceLocation Loc,
836 const char *&PrevSpec, unsigned &DiagID,
839 /// Returns true if the current token is the identifier 'instancetype'.
841 /// Should only be used in Objective-C language modes.
842 bool isObjCInstancetype() {
843 assert(getLangOpts().ObjC);
844 if (Tok.isAnnotation())
846 if (!Ident_instancetype)
847 Ident_instancetype = PP.getIdentifierInfo("instancetype");
848 return Tok.getIdentifierInfo() == Ident_instancetype;
851 /// TryKeywordIdentFallback - For compatibility with system headers using
852 /// keywords as identifiers, attempt to convert the current token to an
853 /// identifier and optionally disable the keyword for the remainder of the
854 /// translation unit. This returns false if the token was not replaced,
855 /// otherwise emits a diagnostic and returns true.
856 bool TryKeywordIdentFallback(bool DisableKeyword);
858 /// Get the TemplateIdAnnotation from the token.
859 TemplateIdAnnotation *takeTemplateIdAnnotation(const Token &tok);
861 /// TentativeParsingAction - An object that is used as a kind of "tentative
862 /// parsing transaction". It gets instantiated to mark the token position and
863 /// after the token consumption is done, Commit() or Revert() is called to
864 /// either "commit the consumed tokens" or revert to the previously marked
865 /// token position. Example:
867 /// TentativeParsingAction TPA(*this);
872 class TentativeParsingAction {
874 PreferredTypeBuilder PrevPreferredType;
876 size_t PrevTentativelyDeclaredIdentifierCount;
877 unsigned short PrevParenCount, PrevBracketCount, PrevBraceCount;
881 explicit TentativeParsingAction(Parser& p) : P(p) {
882 PrevPreferredType = P.PreferredType;
884 PrevTentativelyDeclaredIdentifierCount =
885 P.TentativelyDeclaredIdentifiers.size();
886 PrevParenCount = P.ParenCount;
887 PrevBracketCount = P.BracketCount;
888 PrevBraceCount = P.BraceCount;
889 P.PP.EnableBacktrackAtThisPos();
893 assert(isActive && "Parsing action was finished!");
894 P.TentativelyDeclaredIdentifiers.resize(
895 PrevTentativelyDeclaredIdentifierCount);
896 P.PP.CommitBacktrackedTokens();
900 assert(isActive && "Parsing action was finished!");
902 P.PreferredType = PrevPreferredType;
904 P.TentativelyDeclaredIdentifiers.resize(
905 PrevTentativelyDeclaredIdentifierCount);
906 P.ParenCount = PrevParenCount;
907 P.BracketCount = PrevBracketCount;
908 P.BraceCount = PrevBraceCount;
911 ~TentativeParsingAction() {
912 assert(!isActive && "Forgot to call Commit or Revert!");
915 /// A TentativeParsingAction that automatically reverts in its destructor.
916 /// Useful for disambiguation parses that will always be reverted.
917 class RevertingTentativeParsingAction
918 : private Parser::TentativeParsingAction {
920 RevertingTentativeParsingAction(Parser &P)
921 : Parser::TentativeParsingAction(P) {}
922 ~RevertingTentativeParsingAction() { Revert(); }
925 class UnannotatedTentativeParsingAction;
927 /// ObjCDeclContextSwitch - An object used to switch context from
928 /// an objective-c decl context to its enclosing decl context and
930 class ObjCDeclContextSwitch {
933 SaveAndRestore<bool> WithinObjCContainer;
935 explicit ObjCDeclContextSwitch(Parser &p)
936 : P(p), DC(p.getObjCDeclContext()),
937 WithinObjCContainer(P.ParsingInObjCContainer, DC != nullptr) {
939 P.Actions.ActOnObjCTemporaryExitContainerContext(cast<DeclContext>(DC));
941 ~ObjCDeclContextSwitch() {
943 P.Actions.ActOnObjCReenterContainerContext(cast<DeclContext>(DC));
947 /// ExpectAndConsume - The parser expects that 'ExpectedTok' is next in the
948 /// input. If so, it is consumed and false is returned.
950 /// If a trivial punctuator misspelling is encountered, a FixIt error
951 /// diagnostic is issued and false is returned after recovery.
953 /// If the input is malformed, this emits the specified diagnostic and true is
955 bool ExpectAndConsume(tok::TokenKind ExpectedTok,
956 unsigned Diag = diag::err_expected,
957 StringRef DiagMsg = "");
959 /// The parser expects a semicolon and, if present, will consume it.
961 /// If the next token is not a semicolon, this emits the specified diagnostic,
962 /// or, if there's just some closing-delimiter noise (e.g., ')' or ']') prior
963 /// to the semicolon, consumes that extra token.
964 bool ExpectAndConsumeSemi(unsigned DiagID);
966 /// The kind of extra semi diagnostic to emit.
970 InstanceVariableList = 2,
971 AfterMemberFunctionDefinition = 3
974 /// Consume any extra semi-colons until the end of the line.
975 void ConsumeExtraSemi(ExtraSemiKind Kind, unsigned TST = TST_unspecified);
977 /// Return false if the next token is an identifier. An 'expected identifier'
978 /// error is emitted otherwise.
980 /// The parser tries to recover from the error by checking if the next token
981 /// is a C++ keyword when parsing Objective-C++. Return false if the recovery
983 bool expectIdentifier();
986 //===--------------------------------------------------------------------===//
987 // Scope manipulation
989 /// ParseScope - Introduces a new scope for parsing. The kind of
990 /// scope is determined by ScopeFlags. Objects of this type should
991 /// be created on the stack to coincide with the position where the
992 /// parser enters the new scope, and this object's constructor will
993 /// create that new scope. Similarly, once the object is destroyed
994 /// the parser will exit the scope.
997 ParseScope(const ParseScope &) = delete;
998 void operator=(const ParseScope &) = delete;
1001 // ParseScope - Construct a new object to manage a scope in the
1002 // parser Self where the new Scope is created with the flags
1003 // ScopeFlags, but only when we aren't about to enter a compound statement.
1004 ParseScope(Parser *Self, unsigned ScopeFlags, bool EnteredScope = true,
1005 bool BeforeCompoundStmt = false)
1007 if (EnteredScope && !BeforeCompoundStmt)
1008 Self->EnterScope(ScopeFlags);
1010 if (BeforeCompoundStmt)
1011 Self->incrementMSManglingNumber();
1013 this->Self = nullptr;
1017 // Exit - Exit the scope associated with this object now, rather
1018 // than waiting until the object is destroyed.
1031 /// EnterScope - Start a new scope.
1032 void EnterScope(unsigned ScopeFlags);
1034 /// ExitScope - Pop a scope off the scope stack.
1038 /// RAII object used to modify the scope flags for the current scope.
1039 class ParseScopeFlags {
1042 ParseScopeFlags(const ParseScopeFlags &) = delete;
1043 void operator=(const ParseScopeFlags &) = delete;
1046 ParseScopeFlags(Parser *Self, unsigned ScopeFlags, bool ManageFlags = true);
1050 //===--------------------------------------------------------------------===//
1051 // Diagnostic Emission and Error recovery.
1054 DiagnosticBuilder Diag(SourceLocation Loc, unsigned DiagID);
1055 DiagnosticBuilder Diag(const Token &Tok, unsigned DiagID);
1056 DiagnosticBuilder Diag(unsigned DiagID) {
1057 return Diag(Tok, DiagID);
1061 void SuggestParentheses(SourceLocation Loc, unsigned DK,
1062 SourceRange ParenRange);
1063 void CheckNestedObjCContexts(SourceLocation AtLoc);
1067 /// Control flags for SkipUntil functions.
1068 enum SkipUntilFlags {
1069 StopAtSemi = 1 << 0, ///< Stop skipping at semicolon
1070 /// Stop skipping at specified token, but don't skip the token itself
1071 StopBeforeMatch = 1 << 1,
1072 StopAtCodeCompletion = 1 << 2 ///< Stop at code completion
1075 friend constexpr SkipUntilFlags operator|(SkipUntilFlags L,
1077 return static_cast<SkipUntilFlags>(static_cast<unsigned>(L) |
1078 static_cast<unsigned>(R));
1081 /// SkipUntil - Read tokens until we get to the specified token, then consume
1082 /// it (unless StopBeforeMatch is specified). Because we cannot guarantee
1083 /// that the token will ever occur, this skips to the next token, or to some
1084 /// likely good stopping point. If Flags has StopAtSemi flag, skipping will
1085 /// stop at a ';' character.
1087 /// If SkipUntil finds the specified token, it returns true, otherwise it
1089 bool SkipUntil(tok::TokenKind T,
1090 SkipUntilFlags Flags = static_cast<SkipUntilFlags>(0)) {
1091 return SkipUntil(llvm::makeArrayRef(T), Flags);
1093 bool SkipUntil(tok::TokenKind T1, tok::TokenKind T2,
1094 SkipUntilFlags Flags = static_cast<SkipUntilFlags>(0)) {
1095 tok::TokenKind TokArray[] = {T1, T2};
1096 return SkipUntil(TokArray, Flags);
1098 bool SkipUntil(tok::TokenKind T1, tok::TokenKind T2, tok::TokenKind T3,
1099 SkipUntilFlags Flags = static_cast<SkipUntilFlags>(0)) {
1100 tok::TokenKind TokArray[] = {T1, T2, T3};
1101 return SkipUntil(TokArray, Flags);
1103 bool SkipUntil(ArrayRef<tok::TokenKind> Toks,
1104 SkipUntilFlags Flags = static_cast<SkipUntilFlags>(0));
1106 /// SkipMalformedDecl - Read tokens until we get to some likely good stopping
1107 /// point for skipping past a simple-declaration.
1108 void SkipMalformedDecl();
1111 //===--------------------------------------------------------------------===//
1112 // Lexing and parsing of C++ inline methods.
1114 struct ParsingClass;
1116 /// [class.mem]p1: "... the class is regarded as complete within
1117 /// - function bodies
1118 /// - default arguments
1119 /// - exception-specifications (TODO: C++0x)
1120 /// - and brace-or-equal-initializers for non-static data members
1121 /// (including such things in nested classes)."
1122 /// LateParsedDeclarations build the tree of those elements so they can
1123 /// be parsed after parsing the top-level class.
1124 class LateParsedDeclaration {
1126 virtual ~LateParsedDeclaration();
1128 virtual void ParseLexedMethodDeclarations();
1129 virtual void ParseLexedMemberInitializers();
1130 virtual void ParseLexedMethodDefs();
1131 virtual void ParseLexedAttributes();
1134 /// Inner node of the LateParsedDeclaration tree that parses
1135 /// all its members recursively.
1136 class LateParsedClass : public LateParsedDeclaration {
1138 LateParsedClass(Parser *P, ParsingClass *C);
1139 ~LateParsedClass() override;
1141 void ParseLexedMethodDeclarations() override;
1142 void ParseLexedMemberInitializers() override;
1143 void ParseLexedMethodDefs() override;
1144 void ParseLexedAttributes() override;
1148 ParsingClass *Class;
1151 /// Contains the lexed tokens of an attribute with arguments that
1152 /// may reference member variables and so need to be parsed at the
1153 /// end of the class declaration after parsing all other member
1154 /// member declarations.
1155 /// FIXME: Perhaps we should change the name of LateParsedDeclaration to
1156 /// LateParsedTokens.
1157 struct LateParsedAttribute : public LateParsedDeclaration {
1160 IdentifierInfo &AttrName;
1161 IdentifierInfo *MacroII = nullptr;
1162 SourceLocation AttrNameLoc;
1163 SmallVector<Decl*, 2> Decls;
1165 explicit LateParsedAttribute(Parser *P, IdentifierInfo &Name,
1167 : Self(P), AttrName(Name), AttrNameLoc(Loc) {}
1169 void ParseLexedAttributes() override;
1171 void addDecl(Decl *D) { Decls.push_back(D); }
1174 // A list of late-parsed attributes. Used by ParseGNUAttributes.
1175 class LateParsedAttrList: public SmallVector<LateParsedAttribute *, 2> {
1177 LateParsedAttrList(bool PSoon = false) : ParseSoon(PSoon) { }
1179 bool parseSoon() { return ParseSoon; }
1182 bool ParseSoon; // Are we planning to parse these shortly after creation?
1185 /// Contains the lexed tokens of a member function definition
1186 /// which needs to be parsed at the end of the class declaration
1187 /// after parsing all other member declarations.
1188 struct LexedMethod : public LateParsedDeclaration {
1193 /// Whether this member function had an associated template
1194 /// scope. When true, D is a template declaration.
1195 /// otherwise, it is a member function declaration.
1198 explicit LexedMethod(Parser* P, Decl *MD)
1199 : Self(P), D(MD), TemplateScope(false) {}
1201 void ParseLexedMethodDefs() override;
1204 /// LateParsedDefaultArgument - Keeps track of a parameter that may
1205 /// have a default argument that cannot be parsed yet because it
1206 /// occurs within a member function declaration inside the class
1207 /// (C++ [class.mem]p2).
1208 struct LateParsedDefaultArgument {
1209 explicit LateParsedDefaultArgument(Decl *P,
1210 std::unique_ptr<CachedTokens> Toks = nullptr)
1211 : Param(P), Toks(std::move(Toks)) { }
1213 /// Param - The parameter declaration for this parameter.
1216 /// Toks - The sequence of tokens that comprises the default
1217 /// argument expression, not including the '=' or the terminating
1218 /// ')' or ','. This will be NULL for parameters that have no
1219 /// default argument.
1220 std::unique_ptr<CachedTokens> Toks;
1223 /// LateParsedMethodDeclaration - A method declaration inside a class that
1224 /// contains at least one entity whose parsing needs to be delayed
1225 /// until the class itself is completely-defined, such as a default
1226 /// argument (C++ [class.mem]p2).
1227 struct LateParsedMethodDeclaration : public LateParsedDeclaration {
1228 explicit LateParsedMethodDeclaration(Parser *P, Decl *M)
1229 : Self(P), Method(M), TemplateScope(false),
1230 ExceptionSpecTokens(nullptr) {}
1232 void ParseLexedMethodDeclarations() override;
1236 /// Method - The method declaration.
1239 /// Whether this member function had an associated template
1240 /// scope. When true, D is a template declaration.
1241 /// otherwise, it is a member function declaration.
1244 /// DefaultArgs - Contains the parameters of the function and
1245 /// their default arguments. At least one of the parameters will
1246 /// have a default argument, but all of the parameters of the
1247 /// method will be stored so that they can be reintroduced into
1248 /// scope at the appropriate times.
1249 SmallVector<LateParsedDefaultArgument, 8> DefaultArgs;
1251 /// The set of tokens that make up an exception-specification that
1252 /// has not yet been parsed.
1253 CachedTokens *ExceptionSpecTokens;
1256 /// LateParsedMemberInitializer - An initializer for a non-static class data
1257 /// member whose parsing must to be delayed until the class is completely
1258 /// defined (C++11 [class.mem]p2).
1259 struct LateParsedMemberInitializer : public LateParsedDeclaration {
1260 LateParsedMemberInitializer(Parser *P, Decl *FD)
1261 : Self(P), Field(FD) { }
1263 void ParseLexedMemberInitializers() override;
1267 /// Field - The field declaration.
1270 /// CachedTokens - The sequence of tokens that comprises the initializer,
1271 /// including any leading '='.
1275 /// LateParsedDeclarationsContainer - During parsing of a top (non-nested)
1276 /// C++ class, its method declarations that contain parts that won't be
1277 /// parsed until after the definition is completed (C++ [class.mem]p2),
1278 /// the method declarations and possibly attached inline definitions
1279 /// will be stored here with the tokens that will be parsed to create those
1281 typedef SmallVector<LateParsedDeclaration*,2> LateParsedDeclarationsContainer;
1283 /// Representation of a class that has been parsed, including
1284 /// any member function declarations or definitions that need to be
1285 /// parsed after the corresponding top-level class is complete.
1286 struct ParsingClass {
1287 ParsingClass(Decl *TagOrTemplate, bool TopLevelClass, bool IsInterface)
1288 : TopLevelClass(TopLevelClass), TemplateScope(false),
1289 IsInterface(IsInterface), TagOrTemplate(TagOrTemplate) { }
1291 /// Whether this is a "top-level" class, meaning that it is
1292 /// not nested within another class.
1293 bool TopLevelClass : 1;
1295 /// Whether this class had an associated template
1296 /// scope. When true, TagOrTemplate is a template declaration;
1297 /// otherwise, it is a tag declaration.
1298 bool TemplateScope : 1;
1300 /// Whether this class is an __interface.
1301 bool IsInterface : 1;
1303 /// The class or class template whose definition we are parsing.
1304 Decl *TagOrTemplate;
1306 /// LateParsedDeclarations - Method declarations, inline definitions and
1307 /// nested classes that contain pieces whose parsing will be delayed until
1308 /// the top-level class is fully defined.
1309 LateParsedDeclarationsContainer LateParsedDeclarations;
1312 /// The stack of classes that is currently being
1313 /// parsed. Nested and local classes will be pushed onto this stack
1314 /// when they are parsed, and removed afterward.
1315 std::stack<ParsingClass *> ClassStack;
1317 ParsingClass &getCurrentClass() {
1318 assert(!ClassStack.empty() && "No lexed method stacks!");
1319 return *ClassStack.top();
1322 /// RAII object used to manage the parsing of a class definition.
1323 class ParsingClassDefinition {
1326 Sema::ParsingClassState State;
1329 ParsingClassDefinition(Parser &P, Decl *TagOrTemplate, bool TopLevelClass,
1331 : P(P), Popped(false),
1332 State(P.PushParsingClass(TagOrTemplate, TopLevelClass, IsInterface)) {
1335 /// Pop this class of the stack.
1337 assert(!Popped && "Nested class has already been popped");
1339 P.PopParsingClass(State);
1342 ~ParsingClassDefinition() {
1344 P.PopParsingClass(State);
1348 /// Contains information about any template-specific
1349 /// information that has been parsed prior to parsing declaration
1351 struct ParsedTemplateInfo {
1352 ParsedTemplateInfo()
1353 : Kind(NonTemplate), TemplateParams(nullptr), TemplateLoc() { }
1355 ParsedTemplateInfo(TemplateParameterLists *TemplateParams,
1356 bool isSpecialization,
1357 bool lastParameterListWasEmpty = false)
1358 : Kind(isSpecialization? ExplicitSpecialization : Template),
1359 TemplateParams(TemplateParams),
1360 LastParameterListWasEmpty(lastParameterListWasEmpty) { }
1362 explicit ParsedTemplateInfo(SourceLocation ExternLoc,
1363 SourceLocation TemplateLoc)
1364 : Kind(ExplicitInstantiation), TemplateParams(nullptr),
1365 ExternLoc(ExternLoc), TemplateLoc(TemplateLoc),
1366 LastParameterListWasEmpty(false){ }
1368 /// The kind of template we are parsing.
1370 /// We are not parsing a template at all.
1372 /// We are parsing a template declaration.
1374 /// We are parsing an explicit specialization.
1375 ExplicitSpecialization,
1376 /// We are parsing an explicit instantiation.
1377 ExplicitInstantiation
1380 /// The template parameter lists, for template declarations
1381 /// and explicit specializations.
1382 TemplateParameterLists *TemplateParams;
1384 /// The location of the 'extern' keyword, if any, for an explicit
1386 SourceLocation ExternLoc;
1388 /// The location of the 'template' keyword, for an explicit
1390 SourceLocation TemplateLoc;
1392 /// Whether the last template parameter list was empty.
1393 bool LastParameterListWasEmpty;
1395 SourceRange getSourceRange() const LLVM_READONLY;
1398 void LexTemplateFunctionForLateParsing(CachedTokens &Toks);
1399 void ParseLateTemplatedFuncDef(LateParsedTemplate &LPT);
1401 static void LateTemplateParserCallback(void *P, LateParsedTemplate &LPT);
1402 static void LateTemplateParserCleanupCallback(void *P);
1404 Sema::ParsingClassState
1405 PushParsingClass(Decl *TagOrTemplate, bool TopLevelClass, bool IsInterface);
1406 void DeallocateParsedClasses(ParsingClass *Class);
1407 void PopParsingClass(Sema::ParsingClassState);
1409 enum CachedInitKind {
1410 CIK_DefaultArgument,
1411 CIK_DefaultInitializer
1414 NamedDecl *ParseCXXInlineMethodDef(AccessSpecifier AS,
1415 ParsedAttributes &AccessAttrs,
1416 ParsingDeclarator &D,
1417 const ParsedTemplateInfo &TemplateInfo,
1418 const VirtSpecifiers &VS,
1419 SourceLocation PureSpecLoc);
1420 void ParseCXXNonStaticMemberInitializer(Decl *VarD);
1421 void ParseLexedAttributes(ParsingClass &Class);
1422 void ParseLexedAttributeList(LateParsedAttrList &LAs, Decl *D,
1423 bool EnterScope, bool OnDefinition);
1424 void ParseLexedAttribute(LateParsedAttribute &LA,
1425 bool EnterScope, bool OnDefinition);
1426 void ParseLexedMethodDeclarations(ParsingClass &Class);
1427 void ParseLexedMethodDeclaration(LateParsedMethodDeclaration &LM);
1428 void ParseLexedMethodDefs(ParsingClass &Class);
1429 void ParseLexedMethodDef(LexedMethod &LM);
1430 void ParseLexedMemberInitializers(ParsingClass &Class);
1431 void ParseLexedMemberInitializer(LateParsedMemberInitializer &MI);
1432 void ParseLexedObjCMethodDefs(LexedMethod &LM, bool parseMethod);
1433 bool ConsumeAndStoreFunctionPrologue(CachedTokens &Toks);
1434 bool ConsumeAndStoreInitializer(CachedTokens &Toks, CachedInitKind CIK);
1435 bool ConsumeAndStoreConditional(CachedTokens &Toks);
1436 bool ConsumeAndStoreUntil(tok::TokenKind T1,
1438 bool StopAtSemi = true,
1439 bool ConsumeFinalToken = true) {
1440 return ConsumeAndStoreUntil(T1, T1, Toks, StopAtSemi, ConsumeFinalToken);
1442 bool ConsumeAndStoreUntil(tok::TokenKind T1, tok::TokenKind T2,
1444 bool StopAtSemi = true,
1445 bool ConsumeFinalToken = true);
1447 //===--------------------------------------------------------------------===//
1448 // C99 6.9: External Definitions.
1449 struct ParsedAttributesWithRange : ParsedAttributes {
1450 ParsedAttributesWithRange(AttributeFactory &factory)
1451 : ParsedAttributes(factory) {}
1454 ParsedAttributes::clear();
1455 Range = SourceRange();
1460 struct ParsedAttributesViewWithRange : ParsedAttributesView {
1461 ParsedAttributesViewWithRange() : ParsedAttributesView() {}
1462 void clearListOnly() {
1463 ParsedAttributesView::clearListOnly();
1464 Range = SourceRange();
1470 DeclGroupPtrTy ParseExternalDeclaration(ParsedAttributesWithRange &attrs,
1471 ParsingDeclSpec *DS = nullptr);
1472 bool isDeclarationAfterDeclarator();
1473 bool isStartOfFunctionDefinition(const ParsingDeclarator &Declarator);
1474 DeclGroupPtrTy ParseDeclarationOrFunctionDefinition(
1475 ParsedAttributesWithRange &attrs,
1476 ParsingDeclSpec *DS = nullptr,
1477 AccessSpecifier AS = AS_none);
1478 DeclGroupPtrTy ParseDeclOrFunctionDefInternal(ParsedAttributesWithRange &attrs,
1479 ParsingDeclSpec &DS,
1480 AccessSpecifier AS);
1482 void SkipFunctionBody();
1483 Decl *ParseFunctionDefinition(ParsingDeclarator &D,
1484 const ParsedTemplateInfo &TemplateInfo = ParsedTemplateInfo(),
1485 LateParsedAttrList *LateParsedAttrs = nullptr);
1486 void ParseKNRParamDeclarations(Declarator &D);
1487 // EndLoc, if non-NULL, is filled with the location of the last token of
1489 ExprResult ParseSimpleAsm(SourceLocation *EndLoc = nullptr);
1490 ExprResult ParseAsmStringLiteral();
1492 // Objective-C External Declarations
1493 void MaybeSkipAttributes(tok::ObjCKeywordKind Kind);
1494 DeclGroupPtrTy ParseObjCAtDirectives(ParsedAttributesWithRange &Attrs);
1495 DeclGroupPtrTy ParseObjCAtClassDeclaration(SourceLocation atLoc);
1496 Decl *ParseObjCAtInterfaceDeclaration(SourceLocation AtLoc,
1497 ParsedAttributes &prefixAttrs);
1498 class ObjCTypeParamListScope;
1499 ObjCTypeParamList *parseObjCTypeParamList();
1500 ObjCTypeParamList *parseObjCTypeParamListOrProtocolRefs(
1501 ObjCTypeParamListScope &Scope, SourceLocation &lAngleLoc,
1502 SmallVectorImpl<IdentifierLocPair> &protocolIdents,
1503 SourceLocation &rAngleLoc, bool mayBeProtocolList = true);
1505 void HelperActionsForIvarDeclarations(Decl *interfaceDecl, SourceLocation atLoc,
1506 BalancedDelimiterTracker &T,
1507 SmallVectorImpl<Decl *> &AllIvarDecls,
1508 bool RBraceMissing);
1509 void ParseObjCClassInstanceVariables(Decl *interfaceDecl,
1510 tok::ObjCKeywordKind visibility,
1511 SourceLocation atLoc);
1512 bool ParseObjCProtocolReferences(SmallVectorImpl<Decl *> &P,
1513 SmallVectorImpl<SourceLocation> &PLocs,
1514 bool WarnOnDeclarations,
1515 bool ForObjCContainer,
1516 SourceLocation &LAngleLoc,
1517 SourceLocation &EndProtoLoc,
1518 bool consumeLastToken);
1520 /// Parse the first angle-bracket-delimited clause for an
1521 /// Objective-C object or object pointer type, which may be either
1522 /// type arguments or protocol qualifiers.
1523 void parseObjCTypeArgsOrProtocolQualifiers(
1524 ParsedType baseType,
1525 SourceLocation &typeArgsLAngleLoc,
1526 SmallVectorImpl<ParsedType> &typeArgs,
1527 SourceLocation &typeArgsRAngleLoc,
1528 SourceLocation &protocolLAngleLoc,
1529 SmallVectorImpl<Decl *> &protocols,
1530 SmallVectorImpl<SourceLocation> &protocolLocs,
1531 SourceLocation &protocolRAngleLoc,
1532 bool consumeLastToken,
1533 bool warnOnIncompleteProtocols);
1535 /// Parse either Objective-C type arguments or protocol qualifiers; if the
1536 /// former, also parse protocol qualifiers afterward.
1537 void parseObjCTypeArgsAndProtocolQualifiers(
1538 ParsedType baseType,
1539 SourceLocation &typeArgsLAngleLoc,
1540 SmallVectorImpl<ParsedType> &typeArgs,
1541 SourceLocation &typeArgsRAngleLoc,
1542 SourceLocation &protocolLAngleLoc,
1543 SmallVectorImpl<Decl *> &protocols,
1544 SmallVectorImpl<SourceLocation> &protocolLocs,
1545 SourceLocation &protocolRAngleLoc,
1546 bool consumeLastToken);
1548 /// Parse a protocol qualifier type such as '<NSCopying>', which is
1549 /// an anachronistic way of writing 'id<NSCopying>'.
1550 TypeResult parseObjCProtocolQualifierType(SourceLocation &rAngleLoc);
1552 /// Parse Objective-C type arguments and protocol qualifiers, extending the
1553 /// current type with the parsed result.
1554 TypeResult parseObjCTypeArgsAndProtocolQualifiers(SourceLocation loc,
1556 bool consumeLastToken,
1557 SourceLocation &endLoc);
1559 void ParseObjCInterfaceDeclList(tok::ObjCKeywordKind contextKey,
1561 DeclGroupPtrTy ParseObjCAtProtocolDeclaration(SourceLocation atLoc,
1562 ParsedAttributes &prefixAttrs);
1564 struct ObjCImplParsingDataRAII {
1568 typedef SmallVector<LexedMethod*, 8> LateParsedObjCMethodContainer;
1569 LateParsedObjCMethodContainer LateParsedObjCMethods;
1571 ObjCImplParsingDataRAII(Parser &parser, Decl *D)
1572 : P(parser), Dcl(D), HasCFunction(false) {
1573 P.CurParsedObjCImpl = this;
1576 ~ObjCImplParsingDataRAII();
1578 void finish(SourceRange AtEnd);
1579 bool isFinished() const { return Finished; }
1584 ObjCImplParsingDataRAII *CurParsedObjCImpl;
1585 void StashAwayMethodOrFunctionBodyTokens(Decl *MDecl);
1587 DeclGroupPtrTy ParseObjCAtImplementationDeclaration(SourceLocation AtLoc,
1588 ParsedAttributes &Attrs);
1589 DeclGroupPtrTy ParseObjCAtEndDeclaration(SourceRange atEnd);
1590 Decl *ParseObjCAtAliasDeclaration(SourceLocation atLoc);
1591 Decl *ParseObjCPropertySynthesize(SourceLocation atLoc);
1592 Decl *ParseObjCPropertyDynamic(SourceLocation atLoc);
1594 IdentifierInfo *ParseObjCSelectorPiece(SourceLocation &MethodLocation);
1595 // Definitions for Objective-c context sensitive keywords recognition.
1597 objc_in=0, objc_out, objc_inout, objc_oneway, objc_bycopy, objc_byref,
1598 objc_nonnull, objc_nullable, objc_null_unspecified,
1601 IdentifierInfo *ObjCTypeQuals[objc_NumQuals];
1603 bool isTokIdentifier_in() const;
1605 ParsedType ParseObjCTypeName(ObjCDeclSpec &DS, DeclaratorContext Ctx,
1606 ParsedAttributes *ParamAttrs);
1607 void ParseObjCMethodRequirement();
1608 Decl *ParseObjCMethodPrototype(
1609 tok::ObjCKeywordKind MethodImplKind = tok::objc_not_keyword,
1610 bool MethodDefinition = true);
1611 Decl *ParseObjCMethodDecl(SourceLocation mLoc, tok::TokenKind mType,
1612 tok::ObjCKeywordKind MethodImplKind = tok::objc_not_keyword,
1613 bool MethodDefinition=true);
1614 void ParseObjCPropertyAttribute(ObjCDeclSpec &DS);
1616 Decl *ParseObjCMethodDefinition();
1619 //===--------------------------------------------------------------------===//
1620 // C99 6.5: Expressions.
1622 /// TypeCastState - State whether an expression is or may be a type cast.
1623 enum TypeCastState {
1629 ExprResult ParseExpression(TypeCastState isTypeCast = NotTypeCast);
1630 ExprResult ParseConstantExpressionInExprEvalContext(
1631 TypeCastState isTypeCast = NotTypeCast);
1632 ExprResult ParseConstantExpression(TypeCastState isTypeCast = NotTypeCast);
1633 ExprResult ParseCaseExpression(SourceLocation CaseLoc);
1634 ExprResult ParseConstraintExpression();
1635 // Expr that doesn't include commas.
1636 ExprResult ParseAssignmentExpression(TypeCastState isTypeCast = NotTypeCast);
1638 ExprResult ParseMSAsmIdentifier(llvm::SmallVectorImpl<Token> &LineToks,
1639 unsigned &NumLineToksConsumed,
1640 bool IsUnevaluated);
1643 ExprResult ParseExpressionWithLeadingAt(SourceLocation AtLoc);
1645 ExprResult ParseExpressionWithLeadingExtension(SourceLocation ExtLoc);
1647 ExprResult ParseRHSOfBinaryExpression(ExprResult LHS,
1648 prec::Level MinPrec);
1649 ExprResult ParseCastExpression(bool isUnaryExpression,
1650 bool isAddressOfOperand,
1652 TypeCastState isTypeCast,
1653 bool isVectorLiteral = false);
1654 ExprResult ParseCastExpression(bool isUnaryExpression,
1655 bool isAddressOfOperand = false,
1656 TypeCastState isTypeCast = NotTypeCast,
1657 bool isVectorLiteral = false);
1659 /// Returns true if the next token cannot start an expression.
1660 bool isNotExpressionStart();
1662 /// Returns true if the next token would start a postfix-expression
1664 bool isPostfixExpressionSuffixStart() {
1665 tok::TokenKind K = Tok.getKind();
1666 return (K == tok::l_square || K == tok::l_paren ||
1667 K == tok::period || K == tok::arrow ||
1668 K == tok::plusplus || K == tok::minusminus);
1671 bool diagnoseUnknownTemplateId(ExprResult TemplateName, SourceLocation Less);
1672 void checkPotentialAngleBracket(ExprResult &PotentialTemplateName);
1673 bool checkPotentialAngleBracketDelimiter(const AngleBracketTracker::Loc &,
1674 const Token &OpToken);
1675 bool checkPotentialAngleBracketDelimiter(const Token &OpToken) {
1676 if (auto *Info = AngleBrackets.getCurrent(*this))
1677 return checkPotentialAngleBracketDelimiter(*Info, OpToken);
1681 ExprResult ParsePostfixExpressionSuffix(ExprResult LHS);
1682 ExprResult ParseUnaryExprOrTypeTraitExpression();
1683 ExprResult ParseBuiltinPrimaryExpression();
1685 ExprResult ParseExprAfterUnaryExprOrTypeTrait(const Token &OpTok,
1688 SourceRange &CastRange);
1690 typedef SmallVector<Expr*, 20> ExprListTy;
1691 typedef SmallVector<SourceLocation, 20> CommaLocsTy;
1693 /// ParseExpressionList - Used for C/C++ (argument-)expression-list.
1694 bool ParseExpressionList(SmallVectorImpl<Expr *> &Exprs,
1695 SmallVectorImpl<SourceLocation> &CommaLocs,
1696 llvm::function_ref<void()> ExpressionStarts =
1697 llvm::function_ref<void()>());
1699 /// ParseSimpleExpressionList - A simple comma-separated list of expressions,
1700 /// used for misc language extensions.
1701 bool ParseSimpleExpressionList(SmallVectorImpl<Expr*> &Exprs,
1702 SmallVectorImpl<SourceLocation> &CommaLocs);
1705 /// ParenParseOption - Control what ParseParenExpression will parse.
1706 enum ParenParseOption {
1707 SimpleExpr, // Only parse '(' expression ')'
1708 FoldExpr, // Also allow fold-expression <anything>
1709 CompoundStmt, // Also allow '(' compound-statement ')'
1710 CompoundLiteral, // Also allow '(' type-name ')' '{' ... '}'
1711 CastExpr // Also allow '(' type-name ')' <anything>
1713 ExprResult ParseParenExpression(ParenParseOption &ExprType,
1714 bool stopIfCastExpr,
1717 SourceLocation &RParenLoc);
1719 ExprResult ParseCXXAmbiguousParenExpression(
1720 ParenParseOption &ExprType, ParsedType &CastTy,
1721 BalancedDelimiterTracker &Tracker, ColonProtectionRAIIObject &ColonProt);
1722 ExprResult ParseCompoundLiteralExpression(ParsedType Ty,
1723 SourceLocation LParenLoc,
1724 SourceLocation RParenLoc);
1726 ExprResult ParseStringLiteralExpression(bool AllowUserDefinedLiteral = false);
1728 ExprResult ParseGenericSelectionExpression();
1730 ExprResult ParseObjCBoolLiteral();
1732 ExprResult ParseFoldExpression(ExprResult LHS, BalancedDelimiterTracker &T);
1734 //===--------------------------------------------------------------------===//
1736 ExprResult tryParseCXXIdExpression(CXXScopeSpec &SS, bool isAddressOfOperand,
1737 Token &Replacement);
1738 ExprResult ParseCXXIdExpression(bool isAddressOfOperand = false);
1740 bool areTokensAdjacent(const Token &A, const Token &B);
1742 void CheckForTemplateAndDigraph(Token &Next, ParsedType ObjectTypePtr,
1743 bool EnteringContext, IdentifierInfo &II,
1746 bool ParseOptionalCXXScopeSpecifier(CXXScopeSpec &SS,
1747 ParsedType ObjectType,
1748 bool EnteringContext,
1749 bool *MayBePseudoDestructor = nullptr,
1750 bool IsTypename = false,
1751 IdentifierInfo **LastII = nullptr,
1752 bool OnlyNamespace = false);
1754 //===--------------------------------------------------------------------===//
1755 // C++11 5.1.2: Lambda expressions
1757 /// Result of tentatively parsing a lambda-introducer.
1758 enum class LambdaIntroducerTentativeParse {
1759 /// This appears to be a lambda-introducer, which has been fully parsed.
1761 /// This is a lambda-introducer, but has not been fully parsed, and this
1762 /// function needs to be called again to parse it.
1764 /// This is definitely an Objective-C message send expression, rather than
1765 /// a lambda-introducer, attribute-specifier, or array designator.
1767 /// This is not a lambda-introducer.
1771 // [...] () -> type {...}
1772 ExprResult ParseLambdaExpression();
1773 ExprResult TryParseLambdaExpression();
1775 ParseLambdaIntroducer(LambdaIntroducer &Intro,
1776 LambdaIntroducerTentativeParse *Tentative = nullptr);
1777 ExprResult ParseLambdaExpressionAfterIntroducer(LambdaIntroducer &Intro);
1779 //===--------------------------------------------------------------------===//
1780 // C++ 5.2p1: C++ Casts
1781 ExprResult ParseCXXCasts();
1783 /// Parse a __builtin_bit_cast(T, E), used to implement C++2a std::bit_cast.
1784 ExprResult ParseBuiltinBitCast();
1786 //===--------------------------------------------------------------------===//
1787 // C++ 5.2p1: C++ Type Identification
1788 ExprResult ParseCXXTypeid();
1790 //===--------------------------------------------------------------------===//
1791 // C++ : Microsoft __uuidof Expression
1792 ExprResult ParseCXXUuidof();
1794 //===--------------------------------------------------------------------===//
1795 // C++ 5.2.4: C++ Pseudo-Destructor Expressions
1796 ExprResult ParseCXXPseudoDestructor(Expr *Base, SourceLocation OpLoc,
1797 tok::TokenKind OpKind,
1799 ParsedType ObjectType);
1801 //===--------------------------------------------------------------------===//
1802 // C++ 9.3.2: C++ 'this' pointer
1803 ExprResult ParseCXXThis();
1805 //===--------------------------------------------------------------------===//
1806 // C++ 15: C++ Throw Expression
1807 ExprResult ParseThrowExpression();
1809 ExceptionSpecificationType tryParseExceptionSpecification(
1811 SourceRange &SpecificationRange,
1812 SmallVectorImpl<ParsedType> &DynamicExceptions,
1813 SmallVectorImpl<SourceRange> &DynamicExceptionRanges,
1814 ExprResult &NoexceptExpr,
1815 CachedTokens *&ExceptionSpecTokens);
1817 // EndLoc is filled with the location of the last token of the specification.
1818 ExceptionSpecificationType ParseDynamicExceptionSpecification(
1819 SourceRange &SpecificationRange,
1820 SmallVectorImpl<ParsedType> &Exceptions,
1821 SmallVectorImpl<SourceRange> &Ranges);
1823 //===--------------------------------------------------------------------===//
1824 // C++0x 8: Function declaration trailing-return-type
1825 TypeResult ParseTrailingReturnType(SourceRange &Range,
1826 bool MayBeFollowedByDirectInit);
1828 //===--------------------------------------------------------------------===//
1829 // C++ 2.13.5: C++ Boolean Literals
1830 ExprResult ParseCXXBoolLiteral();
1832 //===--------------------------------------------------------------------===//
1833 // C++ 5.2.3: Explicit type conversion (functional notation)
1834 ExprResult ParseCXXTypeConstructExpression(const DeclSpec &DS);
1836 /// ParseCXXSimpleTypeSpecifier - [C++ 7.1.5.2] Simple type specifiers.
1837 /// This should only be called when the current token is known to be part of
1838 /// simple-type-specifier.
1839 void ParseCXXSimpleTypeSpecifier(DeclSpec &DS);
1841 bool ParseCXXTypeSpecifierSeq(DeclSpec &DS);
1843 //===--------------------------------------------------------------------===//
1844 // C++ 5.3.4 and 5.3.5: C++ new and delete
1845 bool ParseExpressionListOrTypeId(SmallVectorImpl<Expr*> &Exprs,
1847 void ParseDirectNewDeclarator(Declarator &D);
1848 ExprResult ParseCXXNewExpression(bool UseGlobal, SourceLocation Start);
1849 ExprResult ParseCXXDeleteExpression(bool UseGlobal,
1850 SourceLocation Start);
1852 //===--------------------------------------------------------------------===//
1853 // C++ if/switch/while/for condition expression.
1854 struct ForRangeInfo;
1855 Sema::ConditionResult ParseCXXCondition(StmtResult *InitStmt,
1857 Sema::ConditionKind CK,
1858 ForRangeInfo *FRI = nullptr);
1860 //===--------------------------------------------------------------------===//
1863 ExprResult ParseCoyieldExpression();
1865 //===--------------------------------------------------------------------===//
1866 // C99 6.7.8: Initialization.
1868 /// ParseInitializer
1869 /// initializer: [C99 6.7.8]
1870 /// assignment-expression
1872 ExprResult ParseInitializer() {
1873 if (Tok.isNot(tok::l_brace))
1874 return ParseAssignmentExpression();
1875 return ParseBraceInitializer();
1877 bool MayBeDesignationStart();
1878 ExprResult ParseBraceInitializer();
1879 ExprResult ParseInitializerWithPotentialDesignator();
1881 //===--------------------------------------------------------------------===//
1882 // clang Expressions
1884 ExprResult ParseBlockLiteralExpression(); // ^{...}
1886 //===--------------------------------------------------------------------===//
1887 // Objective-C Expressions
1888 ExprResult ParseObjCAtExpression(SourceLocation AtLocation);
1889 ExprResult ParseObjCStringLiteral(SourceLocation AtLoc);
1890 ExprResult ParseObjCCharacterLiteral(SourceLocation AtLoc);
1891 ExprResult ParseObjCNumericLiteral(SourceLocation AtLoc);
1892 ExprResult ParseObjCBooleanLiteral(SourceLocation AtLoc, bool ArgValue);
1893 ExprResult ParseObjCArrayLiteral(SourceLocation AtLoc);
1894 ExprResult ParseObjCDictionaryLiteral(SourceLocation AtLoc);
1895 ExprResult ParseObjCBoxedExpr(SourceLocation AtLoc);
1896 ExprResult ParseObjCEncodeExpression(SourceLocation AtLoc);
1897 ExprResult ParseObjCSelectorExpression(SourceLocation AtLoc);
1898 ExprResult ParseObjCProtocolExpression(SourceLocation AtLoc);
1899 bool isSimpleObjCMessageExpression();
1900 ExprResult ParseObjCMessageExpression();
1901 ExprResult ParseObjCMessageExpressionBody(SourceLocation LBracloc,
1902 SourceLocation SuperLoc,
1903 ParsedType ReceiverType,
1904 Expr *ReceiverExpr);
1905 ExprResult ParseAssignmentExprWithObjCMessageExprStart(
1906 SourceLocation LBracloc, SourceLocation SuperLoc,
1907 ParsedType ReceiverType, Expr *ReceiverExpr);
1908 bool ParseObjCXXMessageReceiver(bool &IsExpr, void *&TypeOrExpr);
1910 //===--------------------------------------------------------------------===//
1911 // C99 6.8: Statements and Blocks.
1913 /// A SmallVector of statements, with stack size 32 (as that is the only one
1915 typedef SmallVector<Stmt*, 32> StmtVector;
1916 /// A SmallVector of expressions, with stack size 12 (the maximum used.)
1917 typedef SmallVector<Expr*, 12> ExprVector;
1918 /// A SmallVector of types.
1919 typedef SmallVector<ParsedType, 12> TypeVector;
1922 ParseStatement(SourceLocation *TrailingElseLoc = nullptr,
1923 ParsedStmtContext StmtCtx = ParsedStmtContext::SubStmt);
1924 StmtResult ParseStatementOrDeclaration(
1925 StmtVector &Stmts, ParsedStmtContext StmtCtx,
1926 SourceLocation *TrailingElseLoc = nullptr);
1927 StmtResult ParseStatementOrDeclarationAfterAttributes(
1929 ParsedStmtContext StmtCtx,
1930 SourceLocation *TrailingElseLoc,
1931 ParsedAttributesWithRange &Attrs);
1932 StmtResult ParseExprStatement(ParsedStmtContext StmtCtx);
1933 StmtResult ParseLabeledStatement(ParsedAttributesWithRange &attrs,
1934 ParsedStmtContext StmtCtx);
1935 StmtResult ParseCaseStatement(ParsedStmtContext StmtCtx,
1936 bool MissingCase = false,
1937 ExprResult Expr = ExprResult());
1938 StmtResult ParseDefaultStatement(ParsedStmtContext StmtCtx);
1939 StmtResult ParseCompoundStatement(bool isStmtExpr = false);
1940 StmtResult ParseCompoundStatement(bool isStmtExpr,
1941 unsigned ScopeFlags);
1942 void ParseCompoundStatementLeadingPragmas();
1943 bool ConsumeNullStmt(StmtVector &Stmts);
1944 StmtResult ParseCompoundStatementBody(bool isStmtExpr = false);
1945 bool ParseParenExprOrCondition(StmtResult *InitStmt,
1946 Sema::ConditionResult &CondResult,
1948 Sema::ConditionKind CK);
1949 StmtResult ParseIfStatement(SourceLocation *TrailingElseLoc);
1950 StmtResult ParseSwitchStatement(SourceLocation *TrailingElseLoc);
1951 StmtResult ParseWhileStatement(SourceLocation *TrailingElseLoc);
1952 StmtResult ParseDoStatement();
1953 StmtResult ParseForStatement(SourceLocation *TrailingElseLoc);
1954 StmtResult ParseGotoStatement();
1955 StmtResult ParseContinueStatement();
1956 StmtResult ParseBreakStatement();
1957 StmtResult ParseReturnStatement();
1958 StmtResult ParseAsmStatement(bool &msAsm);
1959 StmtResult ParseMicrosoftAsmStatement(SourceLocation AsmLoc);
1960 StmtResult ParsePragmaLoopHint(StmtVector &Stmts,
1961 ParsedStmtContext StmtCtx,
1962 SourceLocation *TrailingElseLoc,
1963 ParsedAttributesWithRange &Attrs);
1965 /// Describes the behavior that should be taken for an __if_exists
1967 enum IfExistsBehavior {
1968 /// Parse the block; this code is always used.
1970 /// Skip the block entirely; this code is never used.
1972 /// Parse the block as a dependent block, which may be used in
1973 /// some template instantiations but not others.
1977 /// Describes the condition of a Microsoft __if_exists or
1978 /// __if_not_exists block.
1979 struct IfExistsCondition {
1980 /// The location of the initial keyword.
1981 SourceLocation KeywordLoc;
1982 /// Whether this is an __if_exists block (rather than an
1983 /// __if_not_exists block).
1986 /// Nested-name-specifier preceding the name.
1989 /// The name we're looking for.
1992 /// The behavior of this __if_exists or __if_not_exists block
1994 IfExistsBehavior Behavior;
1997 bool ParseMicrosoftIfExistsCondition(IfExistsCondition& Result);
1998 void ParseMicrosoftIfExistsStatement(StmtVector &Stmts);
1999 void ParseMicrosoftIfExistsExternalDeclaration();
2000 void ParseMicrosoftIfExistsClassDeclaration(DeclSpec::TST TagType,
2001 ParsedAttributes &AccessAttrs,
2002 AccessSpecifier &CurAS);
2003 bool ParseMicrosoftIfExistsBraceInitializer(ExprVector &InitExprs,
2005 bool ParseAsmOperandsOpt(SmallVectorImpl<IdentifierInfo *> &Names,
2006 SmallVectorImpl<Expr *> &Constraints,
2007 SmallVectorImpl<Expr *> &Exprs);
2009 //===--------------------------------------------------------------------===//
2010 // C++ 6: Statements and Blocks
2012 StmtResult ParseCXXTryBlock();
2013 StmtResult ParseCXXTryBlockCommon(SourceLocation TryLoc, bool FnTry = false);
2014 StmtResult ParseCXXCatchBlock(bool FnCatch = false);
2016 //===--------------------------------------------------------------------===//
2017 // MS: SEH Statements and Blocks
2019 StmtResult ParseSEHTryBlock();
2020 StmtResult ParseSEHExceptBlock(SourceLocation Loc);
2021 StmtResult ParseSEHFinallyBlock(SourceLocation Loc);
2022 StmtResult ParseSEHLeaveStatement();
2024 //===--------------------------------------------------------------------===//
2025 // Objective-C Statements
2027 StmtResult ParseObjCAtStatement(SourceLocation atLoc,
2028 ParsedStmtContext StmtCtx);
2029 StmtResult ParseObjCTryStmt(SourceLocation atLoc);
2030 StmtResult ParseObjCThrowStmt(SourceLocation atLoc);
2031 StmtResult ParseObjCSynchronizedStmt(SourceLocation atLoc);
2032 StmtResult ParseObjCAutoreleasePoolStmt(SourceLocation atLoc);
2035 //===--------------------------------------------------------------------===//
2036 // C99 6.7: Declarations.
2038 /// A context for parsing declaration specifiers. TODO: flesh this
2039 /// out, there are other significant restrictions on specifiers than
2040 /// would be best implemented in the parser.
2041 enum class DeclSpecContext {
2042 DSC_normal, // normal context
2043 DSC_class, // class context, enables 'friend'
2044 DSC_type_specifier, // C++ type-specifier-seq or C specifier-qualifier-list
2045 DSC_trailing, // C++11 trailing-type-specifier in a trailing return type
2046 DSC_alias_declaration, // C++11 type-specifier-seq in an alias-declaration
2047 DSC_top_level, // top-level/namespace declaration context
2048 DSC_template_param, // template parameter context
2049 DSC_template_type_arg, // template type argument context
2050 DSC_objc_method_result, // ObjC method result context, enables 'instancetype'
2051 DSC_condition // condition declaration context
2054 /// Is this a context in which we are parsing just a type-specifier (or
2055 /// trailing-type-specifier)?
2056 static bool isTypeSpecifier(DeclSpecContext DSC) {
2058 case DeclSpecContext::DSC_normal:
2059 case DeclSpecContext::DSC_template_param:
2060 case DeclSpecContext::DSC_class:
2061 case DeclSpecContext::DSC_top_level:
2062 case DeclSpecContext::DSC_objc_method_result:
2063 case DeclSpecContext::DSC_condition:
2066 case DeclSpecContext::DSC_template_type_arg:
2067 case DeclSpecContext::DSC_type_specifier:
2068 case DeclSpecContext::DSC_trailing:
2069 case DeclSpecContext::DSC_alias_declaration:
2072 llvm_unreachable("Missing DeclSpecContext case");
2075 /// Is this a context in which we can perform class template argument
2077 static bool isClassTemplateDeductionContext(DeclSpecContext DSC) {
2079 case DeclSpecContext::DSC_normal:
2080 case DeclSpecContext::DSC_template_param:
2081 case DeclSpecContext::DSC_class:
2082 case DeclSpecContext::DSC_top_level:
2083 case DeclSpecContext::DSC_condition:
2084 case DeclSpecContext::DSC_type_specifier:
2087 case DeclSpecContext::DSC_objc_method_result:
2088 case DeclSpecContext::DSC_template_type_arg:
2089 case DeclSpecContext::DSC_trailing:
2090 case DeclSpecContext::DSC_alias_declaration:
2093 llvm_unreachable("Missing DeclSpecContext case");
2096 /// Information on a C++0x for-range-initializer found while parsing a
2097 /// declaration which turns out to be a for-range-declaration.
2098 struct ForRangeInit {
2099 SourceLocation ColonLoc;
2100 ExprResult RangeExpr;
2102 bool ParsedForRangeDecl() { return !ColonLoc.isInvalid(); }
2104 struct ForRangeInfo : ForRangeInit {
2108 DeclGroupPtrTy ParseDeclaration(DeclaratorContext Context,
2109 SourceLocation &DeclEnd,
2110 ParsedAttributesWithRange &attrs);
2111 DeclGroupPtrTy ParseSimpleDeclaration(DeclaratorContext Context,
2112 SourceLocation &DeclEnd,
2113 ParsedAttributesWithRange &attrs,
2115 ForRangeInit *FRI = nullptr);
2116 bool MightBeDeclarator(DeclaratorContext Context);
2117 DeclGroupPtrTy ParseDeclGroup(ParsingDeclSpec &DS, DeclaratorContext Context,
2118 SourceLocation *DeclEnd = nullptr,
2119 ForRangeInit *FRI = nullptr);
2120 Decl *ParseDeclarationAfterDeclarator(Declarator &D,
2121 const ParsedTemplateInfo &TemplateInfo = ParsedTemplateInfo());
2122 bool ParseAsmAttributesAfterDeclarator(Declarator &D);
2123 Decl *ParseDeclarationAfterDeclaratorAndAttributes(
2125 const ParsedTemplateInfo &TemplateInfo = ParsedTemplateInfo(),
2126 ForRangeInit *FRI = nullptr);
2127 Decl *ParseFunctionStatementBody(Decl *Decl, ParseScope &BodyScope);
2128 Decl *ParseFunctionTryBlock(Decl *Decl, ParseScope &BodyScope);
2130 /// When in code-completion, skip parsing of the function/method body
2131 /// unless the body contains the code-completion point.
2133 /// \returns true if the function body was skipped.
2134 bool trySkippingFunctionBody();
2136 bool ParseImplicitInt(DeclSpec &DS, CXXScopeSpec *SS,
2137 const ParsedTemplateInfo &TemplateInfo,
2138 AccessSpecifier AS, DeclSpecContext DSC,
2139 ParsedAttributesWithRange &Attrs);
2141 getDeclSpecContextFromDeclaratorContext(DeclaratorContext Context);
2142 void ParseDeclarationSpecifiers(
2144 const ParsedTemplateInfo &TemplateInfo = ParsedTemplateInfo(),
2145 AccessSpecifier AS = AS_none,
2146 DeclSpecContext DSC = DeclSpecContext::DSC_normal,
2147 LateParsedAttrList *LateAttrs = nullptr);
2148 bool DiagnoseMissingSemiAfterTagDefinition(
2149 DeclSpec &DS, AccessSpecifier AS, DeclSpecContext DSContext,
2150 LateParsedAttrList *LateAttrs = nullptr);
2152 void ParseSpecifierQualifierList(
2153 DeclSpec &DS, AccessSpecifier AS = AS_none,
2154 DeclSpecContext DSC = DeclSpecContext::DSC_normal);
2156 void ParseObjCTypeQualifierList(ObjCDeclSpec &DS,
2157 DeclaratorContext Context);
2159 void ParseEnumSpecifier(SourceLocation TagLoc, DeclSpec &DS,
2160 const ParsedTemplateInfo &TemplateInfo,
2161 AccessSpecifier AS, DeclSpecContext DSC);
2162 void ParseEnumBody(SourceLocation StartLoc, Decl *TagDecl);
2163 void ParseStructUnionBody(SourceLocation StartLoc, unsigned TagType,
2166 void ParseStructDeclaration(
2167 ParsingDeclSpec &DS,
2168 llvm::function_ref<void(ParsingFieldDeclarator &)> FieldsCallback);
2170 bool isDeclarationSpecifier(bool DisambiguatingWithExpression = false);
2171 bool isTypeSpecifierQualifier();
2173 /// isKnownToBeTypeSpecifier - Return true if we know that the specified token
2174 /// is definitely a type-specifier. Return false if it isn't part of a type
2175 /// specifier or if we're not sure.
2176 bool isKnownToBeTypeSpecifier(const Token &Tok) const;
2178 /// Return true if we know that we are definitely looking at a
2179 /// decl-specifier, and isn't part of an expression such as a function-style
2180 /// cast. Return false if it's no a decl-specifier, or we're not sure.
2181 bool isKnownToBeDeclarationSpecifier() {
2182 if (getLangOpts().CPlusPlus)
2183 return isCXXDeclarationSpecifier() == TPResult::True;
2184 return isDeclarationSpecifier(true);
2187 /// isDeclarationStatement - Disambiguates between a declaration or an
2188 /// expression statement, when parsing function bodies.
2189 /// Returns true for declaration, false for expression.
2190 bool isDeclarationStatement() {
2191 if (getLangOpts().CPlusPlus)
2192 return isCXXDeclarationStatement();
2193 return isDeclarationSpecifier(true);
2196 /// isForInitDeclaration - Disambiguates between a declaration or an
2197 /// expression in the context of the C 'clause-1' or the C++
2198 // 'for-init-statement' part of a 'for' statement.
2199 /// Returns true for declaration, false for expression.
2200 bool isForInitDeclaration() {
2201 if (getLangOpts().OpenMP)
2202 Actions.startOpenMPLoop();
2203 if (getLangOpts().CPlusPlus)
2204 return isCXXSimpleDeclaration(/*AllowForRangeDecl=*/true);
2205 return isDeclarationSpecifier(true);
2208 /// Determine whether this is a C++1z for-range-identifier.
2209 bool isForRangeIdentifier();
2211 /// Determine whether we are currently at the start of an Objective-C
2212 /// class message that appears to be missing the open bracket '['.
2213 bool isStartOfObjCClassMessageMissingOpenBracket();
2215 /// Starting with a scope specifier, identifier, or
2216 /// template-id that refers to the current class, determine whether
2217 /// this is a constructor declarator.
2218 bool isConstructorDeclarator(bool Unqualified, bool DeductionGuide = false);
2220 /// Specifies the context in which type-id/expression
2221 /// disambiguation will occur.
2222 enum TentativeCXXTypeIdContext {
2225 TypeIdAsTemplateArgument
2229 /// isTypeIdInParens - Assumes that a '(' was parsed and now we want to know
2230 /// whether the parens contain an expression or a type-id.
2231 /// Returns true for a type-id and false for an expression.
2232 bool isTypeIdInParens(bool &isAmbiguous) {
2233 if (getLangOpts().CPlusPlus)
2234 return isCXXTypeId(TypeIdInParens, isAmbiguous);
2235 isAmbiguous = false;
2236 return isTypeSpecifierQualifier();
2238 bool isTypeIdInParens() {
2240 return isTypeIdInParens(isAmbiguous);
2243 /// Checks if the current tokens form type-id or expression.
2244 /// It is similar to isTypeIdInParens but does not suppose that type-id
2245 /// is in parenthesis.
2246 bool isTypeIdUnambiguously() {
2248 if (getLangOpts().CPlusPlus)
2249 return isCXXTypeId(TypeIdUnambiguous, IsAmbiguous);
2250 return isTypeSpecifierQualifier();
2253 /// isCXXDeclarationStatement - C++-specialized function that disambiguates
2254 /// between a declaration or an expression statement, when parsing function
2255 /// bodies. Returns true for declaration, false for expression.
2256 bool isCXXDeclarationStatement();
2258 /// isCXXSimpleDeclaration - C++-specialized function that disambiguates
2259 /// between a simple-declaration or an expression-statement.
2260 /// If during the disambiguation process a parsing error is encountered,
2261 /// the function returns true to let the declaration parsing code handle it.
2262 /// Returns false if the statement is disambiguated as expression.
2263 bool isCXXSimpleDeclaration(bool AllowForRangeDecl);
2265 /// isCXXFunctionDeclarator - Disambiguates between a function declarator or
2266 /// a constructor-style initializer, when parsing declaration statements.
2267 /// Returns true for function declarator and false for constructor-style
2268 /// initializer. Sets 'IsAmbiguous' to true to indicate that this declaration
2269 /// might be a constructor-style initializer.
2270 /// If during the disambiguation process a parsing error is encountered,
2271 /// the function returns true to let the declaration parsing code handle it.
2272 bool isCXXFunctionDeclarator(bool *IsAmbiguous = nullptr);
2274 struct ConditionDeclarationOrInitStatementState;
2275 enum class ConditionOrInitStatement {
2276 Expression, ///< Disambiguated as an expression (either kind).
2277 ConditionDecl, ///< Disambiguated as the declaration form of condition.
2278 InitStmtDecl, ///< Disambiguated as a simple-declaration init-statement.
2279 ForRangeDecl, ///< Disambiguated as a for-range declaration.
2280 Error ///< Can't be any of the above!
2282 /// Disambiguates between the different kinds of things that can happen
2283 /// after 'if (' or 'switch ('. This could be one of two different kinds of
2284 /// declaration (depending on whether there is a ';' later) or an expression.
2285 ConditionOrInitStatement
2286 isCXXConditionDeclarationOrInitStatement(bool CanBeInitStmt,
2287 bool CanBeForRangeDecl);
2289 bool isCXXTypeId(TentativeCXXTypeIdContext Context, bool &isAmbiguous);
2290 bool isCXXTypeId(TentativeCXXTypeIdContext Context) {
2292 return isCXXTypeId(Context, isAmbiguous);
2295 /// TPResult - Used as the result value for functions whose purpose is to
2296 /// disambiguate C++ constructs by "tentatively parsing" them.
2297 enum class TPResult {
2298 True, False, Ambiguous, Error
2301 /// Based only on the given token kind, determine whether we know that
2302 /// we're at the start of an expression or a type-specifier-seq (which may
2303 /// be an expression, in C++).
2305 /// This routine does not attempt to resolve any of the trick cases, e.g.,
2306 /// those involving lookup of identifiers.
2308 /// \returns \c TPR_true if this token starts an expression, \c TPR_false if
2309 /// this token starts a type-specifier-seq, or \c TPR_ambiguous if it cannot
2311 TPResult isExpressionOrTypeSpecifierSimple(tok::TokenKind Kind);
2313 /// isCXXDeclarationSpecifier - Returns TPResult::True if it is a
2314 /// declaration specifier, TPResult::False if it is not,
2315 /// TPResult::Ambiguous if it could be either a decl-specifier or a
2316 /// function-style cast, and TPResult::Error if a parsing error was
2317 /// encountered. If it could be a braced C++11 function-style cast, returns
2318 /// BracedCastResult.
2319 /// Doesn't consume tokens.
2321 isCXXDeclarationSpecifier(TPResult BracedCastResult = TPResult::False,
2322 bool *InvalidAsDeclSpec = nullptr);
2324 /// Given that isCXXDeclarationSpecifier returns \c TPResult::True or
2325 /// \c TPResult::Ambiguous, determine whether the decl-specifier would be
2326 /// a type-specifier other than a cv-qualifier.
2327 bool isCXXDeclarationSpecifierAType();
2329 /// Determine whether the current token sequence might be
2330 /// '<' template-argument-list '>'
2331 /// rather than a less-than expression.
2332 TPResult isTemplateArgumentList(unsigned TokensToSkip);
2334 /// Determine whether an identifier has been tentatively declared as a
2335 /// non-type. Such tentative declarations should not be found to name a type
2336 /// during a tentative parse, but also should not be annotated as a non-type.
2337 bool isTentativelyDeclared(IdentifierInfo *II);
2339 // "Tentative parsing" functions, used for disambiguation. If a parsing error
2340 // is encountered they will return TPResult::Error.
2341 // Returning TPResult::True/False indicates that the ambiguity was
2342 // resolved and tentative parsing may stop. TPResult::Ambiguous indicates
2343 // that more tentative parsing is necessary for disambiguation.
2344 // They all consume tokens, so backtracking should be used after calling them.
2346 TPResult TryParseSimpleDeclaration(bool AllowForRangeDecl);
2347 TPResult TryParseTypeofSpecifier();
2348 TPResult TryParseProtocolQualifiers();
2349 TPResult TryParsePtrOperatorSeq();
2350 TPResult TryParseOperatorId();
2351 TPResult TryParseInitDeclaratorList();
2352 TPResult TryParseDeclarator(bool mayBeAbstract, bool mayHaveIdentifier = true,
2353 bool mayHaveDirectInit = false);
2355 TryParseParameterDeclarationClause(bool *InvalidAsDeclaration = nullptr,
2356 bool VersusTemplateArg = false);
2357 TPResult TryParseFunctionDeclarator();
2358 TPResult TryParseBracketDeclarator();
2359 TPResult TryConsumeDeclarationSpecifier();
2362 TypeResult ParseTypeName(SourceRange *Range = nullptr,
2363 DeclaratorContext Context
2364 = DeclaratorContext::TypeNameContext,
2365 AccessSpecifier AS = AS_none,
2366 Decl **OwnedType = nullptr,
2367 ParsedAttributes *Attrs = nullptr);
2370 void ParseBlockId(SourceLocation CaretLoc);
2372 /// Are [[]] attributes enabled?
2373 bool standardAttributesAllowed() const {
2374 const LangOptions &LO = getLangOpts();
2375 return LO.DoubleSquareBracketAttributes;
2378 // Check for the start of an attribute-specifier-seq in a context where an
2379 // attribute is not allowed.
2380 bool CheckProhibitedCXX11Attribute() {
2381 assert(Tok.is(tok::l_square));
2382 if (!standardAttributesAllowed() || NextToken().isNot(tok::l_square))
2384 return DiagnoseProhibitedCXX11Attribute();
2387 bool DiagnoseProhibitedCXX11Attribute();
2388 void CheckMisplacedCXX11Attribute(ParsedAttributesWithRange &Attrs,
2389 SourceLocation CorrectLocation) {
2390 if (!standardAttributesAllowed())
2392 if ((Tok.isNot(tok::l_square) || NextToken().isNot(tok::l_square)) &&
2393 Tok.isNot(tok::kw_alignas))
2395 DiagnoseMisplacedCXX11Attribute(Attrs, CorrectLocation);
2397 void DiagnoseMisplacedCXX11Attribute(ParsedAttributesWithRange &Attrs,
2398 SourceLocation CorrectLocation);
2400 void stripTypeAttributesOffDeclSpec(ParsedAttributesWithRange &Attrs,
2401 DeclSpec &DS, Sema::TagUseKind TUK);
2403 // FixItLoc = possible correct location for the attributes
2404 void ProhibitAttributes(ParsedAttributesWithRange &Attrs,
2405 SourceLocation FixItLoc = SourceLocation()) {
2406 if (Attrs.Range.isInvalid())
2408 DiagnoseProhibitedAttributes(Attrs.Range, FixItLoc);
2412 void ProhibitAttributes(ParsedAttributesViewWithRange &Attrs,
2413 SourceLocation FixItLoc = SourceLocation()) {
2414 if (Attrs.Range.isInvalid())
2416 DiagnoseProhibitedAttributes(Attrs.Range, FixItLoc);
2417 Attrs.clearListOnly();
2419 void DiagnoseProhibitedAttributes(const SourceRange &Range,
2420 SourceLocation FixItLoc);
2422 // Forbid C++11 and C2x attributes that appear on certain syntactic locations
2423 // which standard permits but we don't supported yet, for example, attributes
2424 // appertain to decl specifiers.
2425 void ProhibitCXX11Attributes(ParsedAttributesWithRange &Attrs,
2428 /// Skip C++11 and C2x attributes and return the end location of the
2430 /// \returns SourceLocation() if there are no attributes.
2431 SourceLocation SkipCXX11Attributes();
2433 /// Diagnose and skip C++11 and C2x attributes that appear in syntactic
2434 /// locations where attributes are not allowed.
2435 void DiagnoseAndSkipCXX11Attributes();
2437 /// Parses syntax-generic attribute arguments for attributes which are
2438 /// known to the implementation, and adds them to the given ParsedAttributes
2439 /// list with the given attribute syntax. Returns the number of arguments
2440 /// parsed for the attribute.
2442 ParseAttributeArgsCommon(IdentifierInfo *AttrName, SourceLocation AttrNameLoc,
2443 ParsedAttributes &Attrs, SourceLocation *EndLoc,
2444 IdentifierInfo *ScopeName, SourceLocation ScopeLoc,
2445 ParsedAttr::Syntax Syntax);
2447 void MaybeParseGNUAttributes(Declarator &D,
2448 LateParsedAttrList *LateAttrs = nullptr) {
2449 if (Tok.is(tok::kw___attribute)) {
2450 ParsedAttributes attrs(AttrFactory);
2451 SourceLocation endLoc;
2452 ParseGNUAttributes(attrs, &endLoc, LateAttrs, &D);
2453 D.takeAttributes(attrs, endLoc);
2456 void MaybeParseGNUAttributes(ParsedAttributes &attrs,
2457 SourceLocation *endLoc = nullptr,
2458 LateParsedAttrList *LateAttrs = nullptr) {
2459 if (Tok.is(tok::kw___attribute))
2460 ParseGNUAttributes(attrs, endLoc, LateAttrs);
2462 void ParseGNUAttributes(ParsedAttributes &attrs,
2463 SourceLocation *endLoc = nullptr,
2464 LateParsedAttrList *LateAttrs = nullptr,
2465 Declarator *D = nullptr);
2466 void ParseGNUAttributeArgs(IdentifierInfo *AttrName,
2467 SourceLocation AttrNameLoc,
2468 ParsedAttributes &Attrs, SourceLocation *EndLoc,
2469 IdentifierInfo *ScopeName, SourceLocation ScopeLoc,
2470 ParsedAttr::Syntax Syntax, Declarator *D);
2471 IdentifierLoc *ParseIdentifierLoc();
2474 ParseClangAttributeArgs(IdentifierInfo *AttrName, SourceLocation AttrNameLoc,
2475 ParsedAttributes &Attrs, SourceLocation *EndLoc,
2476 IdentifierInfo *ScopeName, SourceLocation ScopeLoc,
2477 ParsedAttr::Syntax Syntax);
2479 void MaybeParseCXX11Attributes(Declarator &D) {
2480 if (standardAttributesAllowed() && isCXX11AttributeSpecifier()) {
2481 ParsedAttributesWithRange attrs(AttrFactory);
2482 SourceLocation endLoc;
2483 ParseCXX11Attributes(attrs, &endLoc);
2484 D.takeAttributes(attrs, endLoc);
2487 void MaybeParseCXX11Attributes(ParsedAttributes &attrs,
2488 SourceLocation *endLoc = nullptr) {
2489 if (standardAttributesAllowed() && isCXX11AttributeSpecifier()) {
2490 ParsedAttributesWithRange attrsWithRange(AttrFactory);
2491 ParseCXX11Attributes(attrsWithRange, endLoc);
2492 attrs.takeAllFrom(attrsWithRange);
2495 void MaybeParseCXX11Attributes(ParsedAttributesWithRange &attrs,
2496 SourceLocation *endLoc = nullptr,
2497 bool OuterMightBeMessageSend = false) {
2498 if (standardAttributesAllowed() &&
2499 isCXX11AttributeSpecifier(false, OuterMightBeMessageSend))
2500 ParseCXX11Attributes(attrs, endLoc);
2503 void ParseCXX11AttributeSpecifier(ParsedAttributes &attrs,
2504 SourceLocation *EndLoc = nullptr);
2505 void ParseCXX11Attributes(ParsedAttributesWithRange &attrs,
2506 SourceLocation *EndLoc = nullptr);
2507 /// Parses a C++11 (or C2x)-style attribute argument list. Returns true
2508 /// if this results in adding an attribute to the ParsedAttributes list.
2509 bool ParseCXX11AttributeArgs(IdentifierInfo *AttrName,
2510 SourceLocation AttrNameLoc,
2511 ParsedAttributes &Attrs, SourceLocation *EndLoc,
2512 IdentifierInfo *ScopeName,
2513 SourceLocation ScopeLoc);
2515 IdentifierInfo *TryParseCXX11AttributeIdentifier(SourceLocation &Loc);
2517 void MaybeParseMicrosoftAttributes(ParsedAttributes &attrs,
2518 SourceLocation *endLoc = nullptr) {
2519 if (getLangOpts().MicrosoftExt && Tok.is(tok::l_square))
2520 ParseMicrosoftAttributes(attrs, endLoc);
2522 void ParseMicrosoftUuidAttributeArgs(ParsedAttributes &Attrs);
2523 void ParseMicrosoftAttributes(ParsedAttributes &attrs,
2524 SourceLocation *endLoc = nullptr);
2525 void MaybeParseMicrosoftDeclSpecs(ParsedAttributes &Attrs,
2526 SourceLocation *End = nullptr) {
2527 const auto &LO = getLangOpts();
2528 if (LO.DeclSpecKeyword && Tok.is(tok::kw___declspec))
2529 ParseMicrosoftDeclSpecs(Attrs, End);
2531 void ParseMicrosoftDeclSpecs(ParsedAttributes &Attrs,
2532 SourceLocation *End = nullptr);
2533 bool ParseMicrosoftDeclSpecArgs(IdentifierInfo *AttrName,
2534 SourceLocation AttrNameLoc,
2535 ParsedAttributes &Attrs);
2536 void ParseMicrosoftTypeAttributes(ParsedAttributes &attrs);
2537 void DiagnoseAndSkipExtendedMicrosoftTypeAttributes();
2538 SourceLocation SkipExtendedMicrosoftTypeAttributes();
2539 void ParseMicrosoftInheritanceClassAttributes(ParsedAttributes &attrs);
2540 void ParseBorlandTypeAttributes(ParsedAttributes &attrs);
2541 void ParseOpenCLKernelAttributes(ParsedAttributes &attrs);
2542 void ParseOpenCLQualifiers(ParsedAttributes &Attrs);
2543 /// Parses opencl_unroll_hint attribute if language is OpenCL v2.0
2545 /// \return false if error happens.
2546 bool MaybeParseOpenCLUnrollHintAttribute(ParsedAttributes &Attrs) {
2547 if (getLangOpts().OpenCL)
2548 return ParseOpenCLUnrollHintAttribute(Attrs);
2551 /// Parses opencl_unroll_hint attribute.
2552 /// \return false if error happens.
2553 bool ParseOpenCLUnrollHintAttribute(ParsedAttributes &Attrs);
2554 void ParseNullabilityTypeSpecifiers(ParsedAttributes &attrs);
2556 VersionTuple ParseVersionTuple(SourceRange &Range);
2557 void ParseAvailabilityAttribute(IdentifierInfo &Availability,
2558 SourceLocation AvailabilityLoc,
2559 ParsedAttributes &attrs,
2560 SourceLocation *endLoc,
2561 IdentifierInfo *ScopeName,
2562 SourceLocation ScopeLoc,
2563 ParsedAttr::Syntax Syntax);
2565 Optional<AvailabilitySpec> ParseAvailabilitySpec();
2566 ExprResult ParseAvailabilityCheckExpr(SourceLocation StartLoc);
2568 void ParseExternalSourceSymbolAttribute(IdentifierInfo &ExternalSourceSymbol,
2570 ParsedAttributes &Attrs,
2571 SourceLocation *EndLoc,
2572 IdentifierInfo *ScopeName,
2573 SourceLocation ScopeLoc,
2574 ParsedAttr::Syntax Syntax);
2576 void ParseObjCBridgeRelatedAttribute(IdentifierInfo &ObjCBridgeRelated,
2577 SourceLocation ObjCBridgeRelatedLoc,
2578 ParsedAttributes &attrs,
2579 SourceLocation *endLoc,
2580 IdentifierInfo *ScopeName,
2581 SourceLocation ScopeLoc,
2582 ParsedAttr::Syntax Syntax);
2584 void ParseTypeTagForDatatypeAttribute(IdentifierInfo &AttrName,
2585 SourceLocation AttrNameLoc,
2586 ParsedAttributes &Attrs,
2587 SourceLocation *EndLoc,
2588 IdentifierInfo *ScopeName,
2589 SourceLocation ScopeLoc,
2590 ParsedAttr::Syntax Syntax);
2593 ParseAttributeWithTypeArg(IdentifierInfo &AttrName,
2594 SourceLocation AttrNameLoc, ParsedAttributes &Attrs,
2595 SourceLocation *EndLoc, IdentifierInfo *ScopeName,
2596 SourceLocation ScopeLoc, ParsedAttr::Syntax Syntax);
2598 void ParseTypeofSpecifier(DeclSpec &DS);
2599 SourceLocation ParseDecltypeSpecifier(DeclSpec &DS);
2600 void AnnotateExistingDecltypeSpecifier(const DeclSpec &DS,
2601 SourceLocation StartLoc,
2602 SourceLocation EndLoc);
2603 void ParseUnderlyingTypeSpecifier(DeclSpec &DS);
2604 void ParseAtomicSpecifier(DeclSpec &DS);
2606 ExprResult ParseAlignArgument(SourceLocation Start,
2607 SourceLocation &EllipsisLoc);
2608 void ParseAlignmentSpecifier(ParsedAttributes &Attrs,
2609 SourceLocation *endLoc = nullptr);
2611 VirtSpecifiers::Specifier isCXX11VirtSpecifier(const Token &Tok) const;
2612 VirtSpecifiers::Specifier isCXX11VirtSpecifier() const {
2613 return isCXX11VirtSpecifier(Tok);
2615 void ParseOptionalCXX11VirtSpecifierSeq(VirtSpecifiers &VS, bool IsInterface,
2616 SourceLocation FriendLoc);
2618 bool isCXX11FinalKeyword() const;
2620 /// DeclaratorScopeObj - RAII object used in Parser::ParseDirectDeclarator to
2621 /// enter a new C++ declarator scope and exit it when the function is
2623 class DeclaratorScopeObj {
2629 DeclaratorScopeObj(Parser &p, CXXScopeSpec &ss)
2630 : P(p), SS(ss), EnteredScope(false), CreatedScope(false) {}
2632 void EnterDeclaratorScope() {
2633 assert(!EnteredScope && "Already entered the scope!");
2634 assert(SS.isSet() && "C++ scope was not set!");
2636 CreatedScope = true;
2637 P.EnterScope(0); // Not a decl scope.
2639 if (!P.Actions.ActOnCXXEnterDeclaratorScope(P.getCurScope(), SS))
2640 EnteredScope = true;
2643 ~DeclaratorScopeObj() {
2645 assert(SS.isSet() && "C++ scope was cleared ?");
2646 P.Actions.ActOnCXXExitDeclaratorScope(P.getCurScope(), SS);
2653 /// ParseDeclarator - Parse and verify a newly-initialized declarator.
2654 void ParseDeclarator(Declarator &D);
2655 /// A function that parses a variant of direct-declarator.
2656 typedef void (Parser::*DirectDeclParseFunction)(Declarator&);
2657 void ParseDeclaratorInternal(Declarator &D,
2658 DirectDeclParseFunction DirectDeclParser);
2660 enum AttrRequirements {
2661 AR_NoAttributesParsed = 0, ///< No attributes are diagnosed.
2662 AR_GNUAttributesParsedAndRejected = 1 << 0, ///< Diagnose GNU attributes.
2663 AR_GNUAttributesParsed = 1 << 1,
2664 AR_CXX11AttributesParsed = 1 << 2,
2665 AR_DeclspecAttributesParsed = 1 << 3,
2666 AR_AllAttributesParsed = AR_GNUAttributesParsed |
2667 AR_CXX11AttributesParsed |
2668 AR_DeclspecAttributesParsed,
2669 AR_VendorAttributesParsed = AR_GNUAttributesParsed |
2670 AR_DeclspecAttributesParsed
2673 void ParseTypeQualifierListOpt(
2674 DeclSpec &DS, unsigned AttrReqs = AR_AllAttributesParsed,
2675 bool AtomicAllowed = true, bool IdentifierRequired = false,
2676 Optional<llvm::function_ref<void()>> CodeCompletionHandler = None);
2677 void ParseDirectDeclarator(Declarator &D);
2678 void ParseDecompositionDeclarator(Declarator &D);
2679 void ParseParenDeclarator(Declarator &D);
2680 void ParseFunctionDeclarator(Declarator &D,
2681 ParsedAttributes &attrs,
2682 BalancedDelimiterTracker &Tracker,
2684 bool RequiresArg = false);
2685 bool ParseRefQualifier(bool &RefQualifierIsLValueRef,
2686 SourceLocation &RefQualifierLoc);
2687 bool isFunctionDeclaratorIdentifierList();
2688 void ParseFunctionDeclaratorIdentifierList(
2690 SmallVectorImpl<DeclaratorChunk::ParamInfo> &ParamInfo);
2691 void ParseParameterDeclarationClause(
2693 ParsedAttributes &attrs,
2694 SmallVectorImpl<DeclaratorChunk::ParamInfo> &ParamInfo,
2695 SourceLocation &EllipsisLoc);
2696 void ParseBracketDeclarator(Declarator &D);
2697 void ParseMisplacedBracketDeclarator(Declarator &D);
2699 //===--------------------------------------------------------------------===//
2700 // C++ 7: Declarations [dcl.dcl]
2702 /// The kind of attribute specifier we have found.
2703 enum CXX11AttributeKind {
2704 /// This is not an attribute specifier.
2705 CAK_NotAttributeSpecifier,
2706 /// This should be treated as an attribute-specifier.
2707 CAK_AttributeSpecifier,
2708 /// The next tokens are '[[', but this is not an attribute-specifier. This
2709 /// is ill-formed by C++11 [dcl.attr.grammar]p6.
2710 CAK_InvalidAttributeSpecifier
2713 isCXX11AttributeSpecifier(bool Disambiguate = false,
2714 bool OuterMightBeMessageSend = false);
2716 void DiagnoseUnexpectedNamespace(NamedDecl *Context);
2718 DeclGroupPtrTy ParseNamespace(DeclaratorContext Context,
2719 SourceLocation &DeclEnd,
2720 SourceLocation InlineLoc = SourceLocation());
2722 struct InnerNamespaceInfo {
2723 SourceLocation NamespaceLoc;
2724 SourceLocation InlineLoc;
2725 SourceLocation IdentLoc;
2726 IdentifierInfo *Ident;
2728 using InnerNamespaceInfoList = llvm::SmallVector<InnerNamespaceInfo, 4>;
2730 void ParseInnerNamespace(const InnerNamespaceInfoList &InnerNSs,
2731 unsigned int index, SourceLocation &InlineLoc,
2732 ParsedAttributes &attrs,
2733 BalancedDelimiterTracker &Tracker);
2734 Decl *ParseLinkage(ParsingDeclSpec &DS, DeclaratorContext Context);
2735 Decl *ParseExportDeclaration();
2736 DeclGroupPtrTy ParseUsingDirectiveOrDeclaration(
2737 DeclaratorContext Context, const ParsedTemplateInfo &TemplateInfo,
2738 SourceLocation &DeclEnd, ParsedAttributesWithRange &attrs);
2739 Decl *ParseUsingDirective(DeclaratorContext Context,
2740 SourceLocation UsingLoc,
2741 SourceLocation &DeclEnd,
2742 ParsedAttributes &attrs);
2744 struct UsingDeclarator {
2745 SourceLocation TypenameLoc;
2748 SourceLocation EllipsisLoc;
2751 TypenameLoc = EllipsisLoc = SourceLocation();
2757 bool ParseUsingDeclarator(DeclaratorContext Context, UsingDeclarator &D);
2758 DeclGroupPtrTy ParseUsingDeclaration(DeclaratorContext Context,
2759 const ParsedTemplateInfo &TemplateInfo,
2760 SourceLocation UsingLoc,
2761 SourceLocation &DeclEnd,
2762 AccessSpecifier AS = AS_none);
2763 Decl *ParseAliasDeclarationAfterDeclarator(
2764 const ParsedTemplateInfo &TemplateInfo, SourceLocation UsingLoc,
2765 UsingDeclarator &D, SourceLocation &DeclEnd, AccessSpecifier AS,
2766 ParsedAttributes &Attrs, Decl **OwnedType = nullptr);
2768 Decl *ParseStaticAssertDeclaration(SourceLocation &DeclEnd);
2769 Decl *ParseNamespaceAlias(SourceLocation NamespaceLoc,
2770 SourceLocation AliasLoc, IdentifierInfo *Alias,
2771 SourceLocation &DeclEnd);
2773 //===--------------------------------------------------------------------===//
2774 // C++ 9: classes [class] and C structs/unions.
2775 bool isValidAfterTypeSpecifier(bool CouldBeBitfield);
2776 void ParseClassSpecifier(tok::TokenKind TagTokKind, SourceLocation TagLoc,
2777 DeclSpec &DS, const ParsedTemplateInfo &TemplateInfo,
2778 AccessSpecifier AS, bool EnteringContext,
2779 DeclSpecContext DSC,
2780 ParsedAttributesWithRange &Attributes);
2781 void SkipCXXMemberSpecification(SourceLocation StartLoc,
2782 SourceLocation AttrFixitLoc,
2785 void ParseCXXMemberSpecification(SourceLocation StartLoc,
2786 SourceLocation AttrFixitLoc,
2787 ParsedAttributesWithRange &Attrs,
2790 ExprResult ParseCXXMemberInitializer(Decl *D, bool IsFunction,
2791 SourceLocation &EqualLoc);
2792 bool ParseCXXMemberDeclaratorBeforeInitializer(Declarator &DeclaratorInfo,
2794 ExprResult &BitfieldSize,
2795 LateParsedAttrList &LateAttrs);
2796 void MaybeParseAndDiagnoseDeclSpecAfterCXX11VirtSpecifierSeq(Declarator &D,
2797 VirtSpecifiers &VS);
2798 DeclGroupPtrTy ParseCXXClassMemberDeclaration(
2799 AccessSpecifier AS, ParsedAttributes &Attr,
2800 const ParsedTemplateInfo &TemplateInfo = ParsedTemplateInfo(),
2801 ParsingDeclRAIIObject *DiagsFromTParams = nullptr);
2802 DeclGroupPtrTy ParseCXXClassMemberDeclarationWithPragmas(
2803 AccessSpecifier &AS, ParsedAttributesWithRange &AccessAttrs,
2804 DeclSpec::TST TagType, Decl *Tag);
2805 void ParseConstructorInitializer(Decl *ConstructorDecl);
2806 MemInitResult ParseMemInitializer(Decl *ConstructorDecl);
2807 void HandleMemberFunctionDeclDelays(Declarator& DeclaratorInfo,
2810 //===--------------------------------------------------------------------===//
2811 // C++ 10: Derived classes [class.derived]
2812 TypeResult ParseBaseTypeSpecifier(SourceLocation &BaseLoc,
2813 SourceLocation &EndLocation);
2814 void ParseBaseClause(Decl *ClassDecl);
2815 BaseResult ParseBaseSpecifier(Decl *ClassDecl);
2816 AccessSpecifier getAccessSpecifierIfPresent() const;
2818 bool ParseUnqualifiedIdTemplateId(CXXScopeSpec &SS,
2819 SourceLocation TemplateKWLoc,
2820 IdentifierInfo *Name,
2821 SourceLocation NameLoc,
2822 bool EnteringContext,
2823 ParsedType ObjectType,
2825 bool AssumeTemplateId);
2826 bool ParseUnqualifiedIdOperator(CXXScopeSpec &SS, bool EnteringContext,
2827 ParsedType ObjectType,
2828 UnqualifiedId &Result);
2830 //===--------------------------------------------------------------------===//
2831 // OpenMP: Directives and clauses.
2832 /// Parse clauses for '#pragma omp declare simd'.
2833 DeclGroupPtrTy ParseOMPDeclareSimdClauses(DeclGroupPtrTy Ptr,
2835 SourceLocation Loc);
2836 /// Parse clauses for '#pragma omp declare target'.
2837 DeclGroupPtrTy ParseOMPDeclareTargetClauses();
2838 /// Parse '#pragma omp end declare target'.
2839 void ParseOMPEndDeclareTargetDirective(OpenMPDirectiveKind DKind,
2840 SourceLocation Loc);
2841 /// Parses declarative OpenMP directives.
2842 DeclGroupPtrTy ParseOpenMPDeclarativeDirectiveWithExtDecl(
2843 AccessSpecifier &AS, ParsedAttributesWithRange &Attrs,
2844 DeclSpec::TST TagType = DeclSpec::TST_unspecified,
2845 Decl *TagDecl = nullptr);
2846 /// Parse 'omp declare reduction' construct.
2847 DeclGroupPtrTy ParseOpenMPDeclareReductionDirective(AccessSpecifier AS);
2848 /// Parses initializer for provided omp_priv declaration inside the reduction
2850 void ParseOpenMPReductionInitializerForDecl(VarDecl *OmpPrivParm);
2852 /// Parses 'omp declare mapper' directive.
2853 DeclGroupPtrTy ParseOpenMPDeclareMapperDirective(AccessSpecifier AS);
2854 /// Parses variable declaration in 'omp declare mapper' directive.
2855 TypeResult parseOpenMPDeclareMapperVarDecl(SourceRange &Range,
2856 DeclarationName &Name,
2857 AccessSpecifier AS = AS_none);
2859 /// Parses simple list of variables.
2861 /// \param Kind Kind of the directive.
2862 /// \param Callback Callback function to be called for the list elements.
2863 /// \param AllowScopeSpecifier true, if the variables can have fully
2864 /// qualified names.
2866 bool ParseOpenMPSimpleVarList(
2867 OpenMPDirectiveKind Kind,
2868 const llvm::function_ref<void(CXXScopeSpec &, DeclarationNameInfo)> &
2870 bool AllowScopeSpecifier);
2871 /// Parses declarative or executable directive.
2873 /// \param StmtCtx The context in which we're parsing the directive.
2875 ParseOpenMPDeclarativeOrExecutableDirective(ParsedStmtContext StmtCtx);
2876 /// Parses clause of kind \a CKind for directive of a kind \a Kind.
2878 /// \param DKind Kind of current directive.
2879 /// \param CKind Kind of current clause.
2880 /// \param FirstClause true, if this is the first clause of a kind \a CKind
2881 /// in current directive.
2883 OMPClause *ParseOpenMPClause(OpenMPDirectiveKind DKind,
2884 OpenMPClauseKind CKind, bool FirstClause);
2885 /// Parses clause with a single expression of a kind \a Kind.
2887 /// \param Kind Kind of current clause.
2888 /// \param ParseOnly true to skip the clause's semantic actions and return
2891 OMPClause *ParseOpenMPSingleExprClause(OpenMPClauseKind Kind,
2893 /// Parses simple clause of a kind \a Kind.
2895 /// \param Kind Kind of current clause.
2896 /// \param ParseOnly true to skip the clause's semantic actions and return
2899 OMPClause *ParseOpenMPSimpleClause(OpenMPClauseKind Kind, bool ParseOnly);
2900 /// Parses clause with a single expression and an additional argument
2901 /// of a kind \a Kind.
2903 /// \param Kind Kind of current clause.
2904 /// \param ParseOnly true to skip the clause's semantic actions and return
2907 OMPClause *ParseOpenMPSingleExprWithArgClause(OpenMPClauseKind Kind,
2909 /// Parses clause without any additional arguments.
2911 /// \param Kind Kind of current clause.
2912 /// \param ParseOnly true to skip the clause's semantic actions and return
2915 OMPClause *ParseOpenMPClause(OpenMPClauseKind Kind, bool ParseOnly = false);
2916 /// Parses clause with the list of variables of a kind \a Kind.
2918 /// \param Kind Kind of current clause.
2919 /// \param ParseOnly true to skip the clause's semantic actions and return
2922 OMPClause *ParseOpenMPVarListClause(OpenMPDirectiveKind DKind,
2923 OpenMPClauseKind Kind, bool ParseOnly);
2926 /// Parses simple expression in parens for single-expression clauses of OpenMP
2928 /// \param RLoc Returned location of right paren.
2929 ExprResult ParseOpenMPParensExpr(StringRef ClauseName, SourceLocation &RLoc);
2931 /// Data used for parsing list of variables in OpenMP clauses.
2932 struct OpenMPVarListDataTy {
2933 Expr *TailExpr = nullptr;
2934 SourceLocation ColonLoc;
2935 SourceLocation RLoc;
2936 CXXScopeSpec ReductionOrMapperIdScopeSpec;
2937 DeclarationNameInfo ReductionOrMapperId;
2938 OpenMPDependClauseKind DepKind = OMPC_DEPEND_unknown;
2939 OpenMPLinearClauseKind LinKind = OMPC_LINEAR_val;
2940 SmallVector<OpenMPMapModifierKind, OMPMapClause::NumberOfModifiers>
2942 SmallVector<SourceLocation, OMPMapClause::NumberOfModifiers>
2943 MapTypeModifiersLoc;
2944 OpenMPMapClauseKind MapType = OMPC_MAP_unknown;
2945 bool IsMapTypeImplicit = false;
2946 SourceLocation DepLinMapLoc;
2949 /// Parses clauses with list.
2950 bool ParseOpenMPVarList(OpenMPDirectiveKind DKind, OpenMPClauseKind Kind,
2951 SmallVectorImpl<Expr *> &Vars,
2952 OpenMPVarListDataTy &Data);
2953 bool ParseUnqualifiedId(CXXScopeSpec &SS, bool EnteringContext,
2954 bool AllowDestructorName,
2955 bool AllowConstructorName,
2956 bool AllowDeductionGuide,
2957 ParsedType ObjectType,
2958 SourceLocation *TemplateKWLoc,
2959 UnqualifiedId &Result);
2960 /// Parses the mapper modifier in map, to, and from clauses.
2961 bool parseMapperModifier(OpenMPVarListDataTy &Data);
2962 /// Parses map-type-modifiers in map clause.
2963 /// map([ [map-type-modifier[,] [map-type-modifier[,] ...] map-type : ] list)
2964 /// where, map-type-modifier ::= always | close | mapper(mapper-identifier)
2965 bool parseMapTypeModifiers(OpenMPVarListDataTy &Data);
2968 //===--------------------------------------------------------------------===//
2969 // C++ 14: Templates [temp]
2971 // C++ 14.1: Template Parameters [temp.param]
2972 Decl *ParseDeclarationStartingWithTemplate(DeclaratorContext Context,
2973 SourceLocation &DeclEnd,
2974 ParsedAttributes &AccessAttrs,
2975 AccessSpecifier AS = AS_none);
2976 Decl *ParseTemplateDeclarationOrSpecialization(DeclaratorContext Context,
2977 SourceLocation &DeclEnd,
2978 ParsedAttributes &AccessAttrs,
2979 AccessSpecifier AS);
2980 Decl *ParseSingleDeclarationAfterTemplate(
2981 DeclaratorContext Context, const ParsedTemplateInfo &TemplateInfo,
2982 ParsingDeclRAIIObject &DiagsFromParams, SourceLocation &DeclEnd,
2983 ParsedAttributes &AccessAttrs, AccessSpecifier AS = AS_none);
2984 bool ParseTemplateParameters(unsigned Depth,
2985 SmallVectorImpl<NamedDecl *> &TemplateParams,
2986 SourceLocation &LAngleLoc,
2987 SourceLocation &RAngleLoc);
2988 bool ParseTemplateParameterList(unsigned Depth,
2989 SmallVectorImpl<NamedDecl*> &TemplateParams);
2990 bool isStartOfTemplateTypeParameter();
2991 NamedDecl *ParseTemplateParameter(unsigned Depth, unsigned Position);
2992 NamedDecl *ParseTypeParameter(unsigned Depth, unsigned Position);
2993 NamedDecl *ParseTemplateTemplateParameter(unsigned Depth, unsigned Position);
2994 NamedDecl *ParseNonTypeTemplateParameter(unsigned Depth, unsigned Position);
2995 void DiagnoseMisplacedEllipsis(SourceLocation EllipsisLoc,
2996 SourceLocation CorrectLoc,
2997 bool AlreadyHasEllipsis,
2998 bool IdentifierHasName);
2999 void DiagnoseMisplacedEllipsisInDeclarator(SourceLocation EllipsisLoc,
3001 // C++ 14.3: Template arguments [temp.arg]
3002 typedef SmallVector<ParsedTemplateArgument, 16> TemplateArgList;
3004 bool ParseGreaterThanInTemplateList(SourceLocation &RAngleLoc,
3005 bool ConsumeLastToken,
3006 bool ObjCGenericList);
3007 bool ParseTemplateIdAfterTemplateName(bool ConsumeLastToken,
3008 SourceLocation &LAngleLoc,
3009 TemplateArgList &TemplateArgs,
3010 SourceLocation &RAngleLoc);
3012 bool AnnotateTemplateIdToken(TemplateTy Template, TemplateNameKind TNK,
3014 SourceLocation TemplateKWLoc,
3015 UnqualifiedId &TemplateName,
3016 bool AllowTypeAnnotation = true);
3017 void AnnotateTemplateIdTokenAsType(bool IsClassName = false);
3018 bool ParseTemplateArgumentList(TemplateArgList &TemplateArgs);
3019 ParsedTemplateArgument ParseTemplateTemplateArgument();
3020 ParsedTemplateArgument ParseTemplateArgument();
3021 Decl *ParseExplicitInstantiation(DeclaratorContext Context,
3022 SourceLocation ExternLoc,
3023 SourceLocation TemplateLoc,
3024 SourceLocation &DeclEnd,
3025 ParsedAttributes &AccessAttrs,
3026 AccessSpecifier AS = AS_none);
3027 // C++2a: Template, concept definition [temp]
3029 ParseConceptDefinition(const ParsedTemplateInfo &TemplateInfo,
3030 SourceLocation &DeclEnd);
3032 //===--------------------------------------------------------------------===//
3034 DeclGroupPtrTy ParseModuleDecl(bool IsFirstDecl);
3035 Decl *ParseModuleImport(SourceLocation AtLoc);
3036 bool parseMisplacedModuleImport();
3037 bool tryParseMisplacedModuleImport() {
3038 tok::TokenKind Kind = Tok.getKind();
3039 if (Kind == tok::annot_module_begin || Kind == tok::annot_module_end ||
3040 Kind == tok::annot_module_include)
3041 return parseMisplacedModuleImport();
3045 bool ParseModuleName(
3046 SourceLocation UseLoc,
3047 SmallVectorImpl<std::pair<IdentifierInfo *, SourceLocation>> &Path,
3050 //===--------------------------------------------------------------------===//
3051 // C++11/G++: Type Traits [Type-Traits.html in the GCC manual]
3052 ExprResult ParseTypeTrait();
3054 //===--------------------------------------------------------------------===//
3055 // Embarcadero: Arary and Expression Traits
3056 ExprResult ParseArrayTypeTrait();
3057 ExprResult ParseExpressionTrait();
3059 //===--------------------------------------------------------------------===//
3060 // Preprocessor code-completion pass-through
3061 void CodeCompleteDirective(bool InConditional) override;
3062 void CodeCompleteInConditionalExclusion() override;
3063 void CodeCompleteMacroName(bool IsDefinition) override;
3064 void CodeCompletePreprocessorExpression() override;
3065 void CodeCompleteMacroArgument(IdentifierInfo *Macro, MacroInfo *MacroInfo,
3066 unsigned ArgumentIndex) override;
3067 void CodeCompleteIncludedFile(llvm::StringRef Dir, bool IsAngled) override;
3068 void CodeCompleteNaturalLanguage() override;
3071 } // end namespace clang