Yi Kong | 878f994 | 2023-12-13 12:55:04 +0900 | [diff] [blame^] | 1 | //===--- Parser.h - C Language Parser ---------------------------*- C++ -*-===// |
| 2 | // |
| 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 |
| 6 | // |
| 7 | //===----------------------------------------------------------------------===// |
| 8 | // |
| 9 | // This file defines the Parser interface. |
| 10 | // |
| 11 | //===----------------------------------------------------------------------===// |
| 12 | |
| 13 | #ifndef LLVM_CLANG_PARSE_PARSER_H |
| 14 | #define LLVM_CLANG_PARSE_PARSER_H |
| 15 | |
| 16 | #include "clang/AST/Availability.h" |
| 17 | #include "clang/Basic/BitmaskEnum.h" |
| 18 | #include "clang/Basic/OpenMPKinds.h" |
| 19 | #include "clang/Basic/OperatorPrecedence.h" |
| 20 | #include "clang/Basic/Specifiers.h" |
| 21 | #include "clang/Basic/TokenKinds.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/Frontend/OpenMP/OMPContext.h" |
| 28 | #include "llvm/Support/Compiler.h" |
| 29 | #include "llvm/Support/PrettyStackTrace.h" |
| 30 | #include "llvm/Support/SaveAndRestore.h" |
| 31 | #include <memory> |
| 32 | #include <optional> |
| 33 | #include <stack> |
| 34 | |
| 35 | namespace clang { |
| 36 | class PragmaHandler; |
| 37 | class Scope; |
| 38 | class BalancedDelimiterTracker; |
| 39 | class CorrectionCandidateCallback; |
| 40 | class DeclGroupRef; |
| 41 | class DiagnosticBuilder; |
| 42 | struct LoopHint; |
| 43 | class Parser; |
| 44 | class ParsingDeclRAIIObject; |
| 45 | class ParsingDeclSpec; |
| 46 | class ParsingDeclarator; |
| 47 | class ParsingFieldDeclarator; |
| 48 | class ColonProtectionRAIIObject; |
| 49 | class InMessageExpressionRAIIObject; |
| 50 | class PoisonSEHIdentifiersRAIIObject; |
| 51 | class OMPClause; |
| 52 | class ObjCTypeParamList; |
| 53 | struct OMPTraitProperty; |
| 54 | struct OMPTraitSelector; |
| 55 | struct OMPTraitSet; |
| 56 | class OMPTraitInfo; |
| 57 | |
| 58 | /// Parser - This implements a parser for the C family of languages. After |
| 59 | /// parsing units of the grammar, productions are invoked to handle whatever has |
| 60 | /// been read. |
| 61 | /// |
| 62 | class Parser : public CodeCompletionHandler { |
| 63 | friend class ColonProtectionRAIIObject; |
| 64 | friend class ParsingOpenMPDirectiveRAII; |
| 65 | friend class InMessageExpressionRAIIObject; |
| 66 | friend class OffsetOfStateRAIIObject; |
| 67 | friend class PoisonSEHIdentifiersRAIIObject; |
| 68 | friend class ObjCDeclContextSwitch; |
| 69 | friend class ParenBraceBracketBalancer; |
| 70 | friend class BalancedDelimiterTracker; |
| 71 | |
| 72 | Preprocessor &PP; |
| 73 | |
| 74 | /// Tok - The current token we are peeking ahead. All parsing methods assume |
| 75 | /// that this is valid. |
| 76 | Token Tok; |
| 77 | |
| 78 | // PrevTokLocation - The location of the token we previously |
| 79 | // consumed. This token is used for diagnostics where we expected to |
| 80 | // see a token following another token (e.g., the ';' at the end of |
| 81 | // a statement). |
| 82 | SourceLocation PrevTokLocation; |
| 83 | |
| 84 | /// Tracks an expected type for the current token when parsing an expression. |
| 85 | /// Used by code completion for ranking. |
| 86 | PreferredTypeBuilder PreferredType; |
| 87 | |
| 88 | unsigned short ParenCount = 0, BracketCount = 0, BraceCount = 0; |
| 89 | unsigned short MisplacedModuleBeginCount = 0; |
| 90 | |
| 91 | /// Actions - These are the callbacks we invoke as we parse various constructs |
| 92 | /// in the file. |
| 93 | Sema &Actions; |
| 94 | |
| 95 | DiagnosticsEngine &Diags; |
| 96 | |
| 97 | /// ScopeCache - Cache scopes to reduce malloc traffic. |
| 98 | enum { ScopeCacheSize = 16 }; |
| 99 | unsigned NumCachedScopes; |
| 100 | Scope *ScopeCache[ScopeCacheSize]; |
| 101 | |
| 102 | /// Identifiers used for SEH handling in Borland. These are only |
| 103 | /// allowed in particular circumstances |
| 104 | // __except block |
| 105 | IdentifierInfo *Ident__exception_code, |
| 106 | *Ident___exception_code, |
| 107 | *Ident_GetExceptionCode; |
| 108 | // __except filter expression |
| 109 | IdentifierInfo *Ident__exception_info, |
| 110 | *Ident___exception_info, |
| 111 | *Ident_GetExceptionInfo; |
| 112 | // __finally |
| 113 | IdentifierInfo *Ident__abnormal_termination, |
| 114 | *Ident___abnormal_termination, |
| 115 | *Ident_AbnormalTermination; |
| 116 | |
| 117 | /// Contextual keywords for Microsoft extensions. |
| 118 | IdentifierInfo *Ident__except; |
| 119 | mutable IdentifierInfo *Ident_sealed; |
| 120 | mutable IdentifierInfo *Ident_abstract; |
| 121 | |
| 122 | /// Ident_super - IdentifierInfo for "super", to support fast |
| 123 | /// comparison. |
| 124 | IdentifierInfo *Ident_super; |
| 125 | /// Ident_vector, Ident_bool, Ident_Bool - cached IdentifierInfos for "vector" |
| 126 | /// and "bool" fast comparison. Only present if AltiVec or ZVector are |
| 127 | /// enabled. |
| 128 | IdentifierInfo *Ident_vector; |
| 129 | IdentifierInfo *Ident_bool; |
| 130 | IdentifierInfo *Ident_Bool; |
| 131 | /// Ident_pixel - cached IdentifierInfos for "pixel" fast comparison. |
| 132 | /// Only present if AltiVec enabled. |
| 133 | IdentifierInfo *Ident_pixel; |
| 134 | |
| 135 | /// Objective-C contextual keywords. |
| 136 | IdentifierInfo *Ident_instancetype; |
| 137 | |
| 138 | /// Identifier for "introduced". |
| 139 | IdentifierInfo *Ident_introduced; |
| 140 | |
| 141 | /// Identifier for "deprecated". |
| 142 | IdentifierInfo *Ident_deprecated; |
| 143 | |
| 144 | /// Identifier for "obsoleted". |
| 145 | IdentifierInfo *Ident_obsoleted; |
| 146 | |
| 147 | /// Identifier for "unavailable". |
| 148 | IdentifierInfo *Ident_unavailable; |
| 149 | |
| 150 | /// Identifier for "message". |
| 151 | IdentifierInfo *Ident_message; |
| 152 | |
| 153 | /// Identifier for "strict". |
| 154 | IdentifierInfo *Ident_strict; |
| 155 | |
| 156 | /// Identifier for "replacement". |
| 157 | IdentifierInfo *Ident_replacement; |
| 158 | |
| 159 | /// Identifiers used by the 'external_source_symbol' attribute. |
| 160 | IdentifierInfo *Ident_language, *Ident_defined_in, |
| 161 | *Ident_generated_declaration, *Ident_USR; |
| 162 | |
| 163 | /// C++11 contextual keywords. |
| 164 | mutable IdentifierInfo *Ident_final; |
| 165 | mutable IdentifierInfo *Ident_GNU_final; |
| 166 | mutable IdentifierInfo *Ident_override; |
| 167 | |
| 168 | // C++2a contextual keywords. |
| 169 | mutable IdentifierInfo *Ident_import; |
| 170 | mutable IdentifierInfo *Ident_module; |
| 171 | |
| 172 | // C++ type trait keywords that can be reverted to identifiers and still be |
| 173 | // used as type traits. |
| 174 | llvm::SmallDenseMap<IdentifierInfo *, tok::TokenKind> RevertibleTypeTraits; |
| 175 | |
| 176 | std::unique_ptr<PragmaHandler> AlignHandler; |
| 177 | std::unique_ptr<PragmaHandler> GCCVisibilityHandler; |
| 178 | std::unique_ptr<PragmaHandler> OptionsHandler; |
| 179 | std::unique_ptr<PragmaHandler> PackHandler; |
| 180 | std::unique_ptr<PragmaHandler> MSStructHandler; |
| 181 | std::unique_ptr<PragmaHandler> UnusedHandler; |
| 182 | std::unique_ptr<PragmaHandler> WeakHandler; |
| 183 | std::unique_ptr<PragmaHandler> RedefineExtnameHandler; |
| 184 | std::unique_ptr<PragmaHandler> FPContractHandler; |
| 185 | std::unique_ptr<PragmaHandler> OpenCLExtensionHandler; |
| 186 | std::unique_ptr<PragmaHandler> OpenMPHandler; |
| 187 | std::unique_ptr<PragmaHandler> PCSectionHandler; |
| 188 | std::unique_ptr<PragmaHandler> MSCommentHandler; |
| 189 | std::unique_ptr<PragmaHandler> MSDetectMismatchHandler; |
| 190 | std::unique_ptr<PragmaHandler> FPEvalMethodHandler; |
| 191 | std::unique_ptr<PragmaHandler> FloatControlHandler; |
| 192 | std::unique_ptr<PragmaHandler> MSPointersToMembers; |
| 193 | std::unique_ptr<PragmaHandler> MSVtorDisp; |
| 194 | std::unique_ptr<PragmaHandler> MSInitSeg; |
| 195 | std::unique_ptr<PragmaHandler> MSDataSeg; |
| 196 | std::unique_ptr<PragmaHandler> MSBSSSeg; |
| 197 | std::unique_ptr<PragmaHandler> MSConstSeg; |
| 198 | std::unique_ptr<PragmaHandler> MSCodeSeg; |
| 199 | std::unique_ptr<PragmaHandler> MSSection; |
| 200 | std::unique_ptr<PragmaHandler> MSStrictGuardStackCheck; |
| 201 | std::unique_ptr<PragmaHandler> MSRuntimeChecks; |
| 202 | std::unique_ptr<PragmaHandler> MSIntrinsic; |
| 203 | std::unique_ptr<PragmaHandler> MSFunction; |
| 204 | std::unique_ptr<PragmaHandler> MSOptimize; |
| 205 | std::unique_ptr<PragmaHandler> MSFenvAccess; |
| 206 | std::unique_ptr<PragmaHandler> MSAllocText; |
| 207 | std::unique_ptr<PragmaHandler> CUDAForceHostDeviceHandler; |
| 208 | std::unique_ptr<PragmaHandler> OptimizeHandler; |
| 209 | std::unique_ptr<PragmaHandler> LoopHintHandler; |
| 210 | std::unique_ptr<PragmaHandler> UnrollHintHandler; |
| 211 | std::unique_ptr<PragmaHandler> NoUnrollHintHandler; |
| 212 | std::unique_ptr<PragmaHandler> UnrollAndJamHintHandler; |
| 213 | std::unique_ptr<PragmaHandler> NoUnrollAndJamHintHandler; |
| 214 | std::unique_ptr<PragmaHandler> FPHandler; |
| 215 | std::unique_ptr<PragmaHandler> STDCFenvAccessHandler; |
| 216 | std::unique_ptr<PragmaHandler> STDCFenvRoundHandler; |
| 217 | std::unique_ptr<PragmaHandler> STDCCXLIMITHandler; |
| 218 | std::unique_ptr<PragmaHandler> STDCUnknownHandler; |
| 219 | std::unique_ptr<PragmaHandler> AttributePragmaHandler; |
| 220 | std::unique_ptr<PragmaHandler> MaxTokensHerePragmaHandler; |
| 221 | std::unique_ptr<PragmaHandler> MaxTokensTotalPragmaHandler; |
| 222 | std::unique_ptr<PragmaHandler> RISCVPragmaHandler; |
| 223 | |
| 224 | std::unique_ptr<CommentHandler> CommentSemaHandler; |
| 225 | |
| 226 | /// Whether the '>' token acts as an operator or not. This will be |
| 227 | /// true except when we are parsing an expression within a C++ |
| 228 | /// template argument list, where the '>' closes the template |
| 229 | /// argument list. |
| 230 | bool GreaterThanIsOperator; |
| 231 | |
| 232 | /// ColonIsSacred - When this is false, we aggressively try to recover from |
| 233 | /// code like "foo : bar" as if it were a typo for "foo :: bar". This is not |
| 234 | /// safe in case statements and a few other things. This is managed by the |
| 235 | /// ColonProtectionRAIIObject RAII object. |
| 236 | bool ColonIsSacred; |
| 237 | |
| 238 | /// Parsing OpenMP directive mode. |
| 239 | bool OpenMPDirectiveParsing = false; |
| 240 | |
| 241 | /// When true, we are directly inside an Objective-C message |
| 242 | /// send expression. |
| 243 | /// |
| 244 | /// This is managed by the \c InMessageExpressionRAIIObject class, and |
| 245 | /// should not be set directly. |
| 246 | bool InMessageExpression; |
| 247 | |
| 248 | /// Gets set to true after calling ProduceSignatureHelp, it is for a |
| 249 | /// workaround to make sure ProduceSignatureHelp is only called at the deepest |
| 250 | /// function call. |
| 251 | bool CalledSignatureHelp = false; |
| 252 | |
| 253 | Sema::OffsetOfKind OffsetOfState = Sema::OffsetOfKind::OOK_Outside; |
| 254 | |
| 255 | /// The "depth" of the template parameters currently being parsed. |
| 256 | unsigned TemplateParameterDepth; |
| 257 | |
| 258 | /// Current kind of OpenMP clause |
| 259 | OpenMPClauseKind OMPClauseKind = llvm::omp::OMPC_unknown; |
| 260 | |
| 261 | /// RAII class that manages the template parameter depth. |
| 262 | class TemplateParameterDepthRAII { |
| 263 | unsigned &Depth; |
| 264 | unsigned AddedLevels; |
| 265 | public: |
| 266 | explicit TemplateParameterDepthRAII(unsigned &Depth) |
| 267 | : Depth(Depth), AddedLevels(0) {} |
| 268 | |
| 269 | ~TemplateParameterDepthRAII() { |
| 270 | Depth -= AddedLevels; |
| 271 | } |
| 272 | |
| 273 | void operator++() { |
| 274 | ++Depth; |
| 275 | ++AddedLevels; |
| 276 | } |
| 277 | void addDepth(unsigned D) { |
| 278 | Depth += D; |
| 279 | AddedLevels += D; |
| 280 | } |
| 281 | void setAddedDepth(unsigned D) { |
| 282 | Depth = Depth - AddedLevels + D; |
| 283 | AddedLevels = D; |
| 284 | } |
| 285 | |
| 286 | unsigned getDepth() const { return Depth; } |
| 287 | unsigned getOriginalDepth() const { return Depth - AddedLevels; } |
| 288 | }; |
| 289 | |
| 290 | /// Factory object for creating ParsedAttr objects. |
| 291 | AttributeFactory AttrFactory; |
| 292 | |
| 293 | /// Gathers and cleans up TemplateIdAnnotations when parsing of a |
| 294 | /// top-level declaration is finished. |
| 295 | SmallVector<TemplateIdAnnotation *, 16> TemplateIds; |
| 296 | |
| 297 | void MaybeDestroyTemplateIds() { |
| 298 | if (!TemplateIds.empty() && |
| 299 | (Tok.is(tok::eof) || !PP.mightHavePendingAnnotationTokens())) |
| 300 | DestroyTemplateIds(); |
| 301 | } |
| 302 | void DestroyTemplateIds(); |
| 303 | |
| 304 | /// RAII object to destroy TemplateIdAnnotations where possible, from a |
| 305 | /// likely-good position during parsing. |
| 306 | struct DestroyTemplateIdAnnotationsRAIIObj { |
| 307 | Parser &Self; |
| 308 | |
| 309 | DestroyTemplateIdAnnotationsRAIIObj(Parser &Self) : Self(Self) {} |
| 310 | ~DestroyTemplateIdAnnotationsRAIIObj() { Self.MaybeDestroyTemplateIds(); } |
| 311 | }; |
| 312 | |
| 313 | /// Identifiers which have been declared within a tentative parse. |
| 314 | SmallVector<IdentifierInfo *, 8> TentativelyDeclaredIdentifiers; |
| 315 | |
| 316 | /// Tracker for '<' tokens that might have been intended to be treated as an |
| 317 | /// angle bracket instead of a less-than comparison. |
| 318 | /// |
| 319 | /// This happens when the user intends to form a template-id, but typoes the |
| 320 | /// template-name or forgets a 'template' keyword for a dependent template |
| 321 | /// name. |
| 322 | /// |
| 323 | /// We track these locations from the point where we see a '<' with a |
| 324 | /// name-like expression on its left until we see a '>' or '>>' that might |
| 325 | /// match it. |
| 326 | struct AngleBracketTracker { |
| 327 | /// Flags used to rank candidate template names when there is more than one |
| 328 | /// '<' in a scope. |
| 329 | enum Priority : unsigned short { |
| 330 | /// A non-dependent name that is a potential typo for a template name. |
| 331 | PotentialTypo = 0x0, |
| 332 | /// A dependent name that might instantiate to a template-name. |
| 333 | DependentName = 0x2, |
| 334 | |
| 335 | /// A space appears before the '<' token. |
| 336 | SpaceBeforeLess = 0x0, |
| 337 | /// No space before the '<' token |
| 338 | NoSpaceBeforeLess = 0x1, |
| 339 | |
| 340 | LLVM_MARK_AS_BITMASK_ENUM(/*LargestValue*/ DependentName) |
| 341 | }; |
| 342 | |
| 343 | struct Loc { |
| 344 | Expr *TemplateName; |
| 345 | SourceLocation LessLoc; |
| 346 | AngleBracketTracker::Priority Priority; |
| 347 | unsigned short ParenCount, BracketCount, BraceCount; |
| 348 | |
| 349 | bool isActive(Parser &P) const { |
| 350 | return P.ParenCount == ParenCount && P.BracketCount == BracketCount && |
| 351 | P.BraceCount == BraceCount; |
| 352 | } |
| 353 | |
| 354 | bool isActiveOrNested(Parser &P) const { |
| 355 | return isActive(P) || P.ParenCount > ParenCount || |
| 356 | P.BracketCount > BracketCount || P.BraceCount > BraceCount; |
| 357 | } |
| 358 | }; |
| 359 | |
| 360 | SmallVector<Loc, 8> Locs; |
| 361 | |
| 362 | /// Add an expression that might have been intended to be a template name. |
| 363 | /// In the case of ambiguity, we arbitrarily select the innermost such |
| 364 | /// expression, for example in 'foo < bar < baz', 'bar' is the current |
| 365 | /// candidate. No attempt is made to track that 'foo' is also a candidate |
| 366 | /// for the case where we see a second suspicious '>' token. |
| 367 | void add(Parser &P, Expr *TemplateName, SourceLocation LessLoc, |
| 368 | Priority Prio) { |
| 369 | if (!Locs.empty() && Locs.back().isActive(P)) { |
| 370 | if (Locs.back().Priority <= Prio) { |
| 371 | Locs.back().TemplateName = TemplateName; |
| 372 | Locs.back().LessLoc = LessLoc; |
| 373 | Locs.back().Priority = Prio; |
| 374 | } |
| 375 | } else { |
| 376 | Locs.push_back({TemplateName, LessLoc, Prio, |
| 377 | P.ParenCount, P.BracketCount, P.BraceCount}); |
| 378 | } |
| 379 | } |
| 380 | |
| 381 | /// Mark the current potential missing template location as having been |
| 382 | /// handled (this happens if we pass a "corresponding" '>' or '>>' token |
| 383 | /// or leave a bracket scope). |
| 384 | void clear(Parser &P) { |
| 385 | while (!Locs.empty() && Locs.back().isActiveOrNested(P)) |
| 386 | Locs.pop_back(); |
| 387 | } |
| 388 | |
| 389 | /// Get the current enclosing expression that might hve been intended to be |
| 390 | /// a template name. |
| 391 | Loc *getCurrent(Parser &P) { |
| 392 | if (!Locs.empty() && Locs.back().isActive(P)) |
| 393 | return &Locs.back(); |
| 394 | return nullptr; |
| 395 | } |
| 396 | }; |
| 397 | |
| 398 | AngleBracketTracker AngleBrackets; |
| 399 | |
| 400 | IdentifierInfo *getSEHExceptKeyword(); |
| 401 | |
| 402 | /// True if we are within an Objective-C container while parsing C-like decls. |
| 403 | /// |
| 404 | /// This is necessary because Sema thinks we have left the container |
| 405 | /// to parse the C-like decls, meaning Actions.getObjCDeclContext() will |
| 406 | /// be NULL. |
| 407 | bool ParsingInObjCContainer; |
| 408 | |
| 409 | /// Whether to skip parsing of function bodies. |
| 410 | /// |
| 411 | /// This option can be used, for example, to speed up searches for |
| 412 | /// declarations/definitions when indexing. |
| 413 | bool SkipFunctionBodies; |
| 414 | |
| 415 | /// The location of the expression statement that is being parsed right now. |
| 416 | /// Used to determine if an expression that is being parsed is a statement or |
| 417 | /// just a regular sub-expression. |
| 418 | SourceLocation ExprStatementTokLoc; |
| 419 | |
| 420 | /// Flags describing a context in which we're parsing a statement. |
| 421 | enum class ParsedStmtContext { |
| 422 | /// This context permits declarations in language modes where declarations |
| 423 | /// are not statements. |
| 424 | AllowDeclarationsInC = 0x1, |
| 425 | /// This context permits standalone OpenMP directives. |
| 426 | AllowStandaloneOpenMPDirectives = 0x2, |
| 427 | /// This context is at the top level of a GNU statement expression. |
| 428 | InStmtExpr = 0x4, |
| 429 | |
| 430 | /// The context of a regular substatement. |
| 431 | SubStmt = 0, |
| 432 | /// The context of a compound-statement. |
| 433 | Compound = AllowDeclarationsInC | AllowStandaloneOpenMPDirectives, |
| 434 | |
| 435 | LLVM_MARK_AS_BITMASK_ENUM(InStmtExpr) |
| 436 | }; |
| 437 | |
| 438 | /// Act on an expression statement that might be the last statement in a |
| 439 | /// GNU statement expression. Checks whether we are actually at the end of |
| 440 | /// a statement expression and builds a suitable expression statement. |
| 441 | StmtResult handleExprStmt(ExprResult E, ParsedStmtContext StmtCtx); |
| 442 | |
| 443 | public: |
| 444 | Parser(Preprocessor &PP, Sema &Actions, bool SkipFunctionBodies); |
| 445 | ~Parser() override; |
| 446 | |
| 447 | const LangOptions &getLangOpts() const { return PP.getLangOpts(); } |
| 448 | const TargetInfo &getTargetInfo() const { return PP.getTargetInfo(); } |
| 449 | Preprocessor &getPreprocessor() const { return PP; } |
| 450 | Sema &getActions() const { return Actions; } |
| 451 | AttributeFactory &getAttrFactory() { return AttrFactory; } |
| 452 | |
| 453 | const Token &getCurToken() const { return Tok; } |
| 454 | Scope *getCurScope() const { return Actions.getCurScope(); } |
| 455 | void incrementMSManglingNumber() const { |
| 456 | return Actions.incrementMSManglingNumber(); |
| 457 | } |
| 458 | |
| 459 | ObjCContainerDecl *getObjCDeclContext() const { |
| 460 | return Actions.getObjCDeclContext(); |
| 461 | } |
| 462 | |
| 463 | // Type forwarding. All of these are statically 'void*', but they may all be |
| 464 | // different actual classes based on the actions in place. |
| 465 | typedef OpaquePtr<DeclGroupRef> DeclGroupPtrTy; |
| 466 | typedef OpaquePtr<TemplateName> TemplateTy; |
| 467 | |
| 468 | typedef SmallVector<TemplateParameterList *, 4> TemplateParameterLists; |
| 469 | |
| 470 | typedef Sema::FullExprArg FullExprArg; |
| 471 | |
| 472 | /// A SmallVector of statements. |
| 473 | typedef SmallVector<Stmt *, 32> StmtVector; |
| 474 | |
| 475 | // Parsing methods. |
| 476 | |
| 477 | /// Initialize - Warm up the parser. |
| 478 | /// |
| 479 | void Initialize(); |
| 480 | |
| 481 | /// Parse the first top-level declaration in a translation unit. |
| 482 | bool ParseFirstTopLevelDecl(DeclGroupPtrTy &Result, |
| 483 | Sema::ModuleImportState &ImportState); |
| 484 | |
| 485 | /// ParseTopLevelDecl - Parse one top-level declaration. Returns true if |
| 486 | /// the EOF was encountered. |
| 487 | bool ParseTopLevelDecl(DeclGroupPtrTy &Result, |
| 488 | Sema::ModuleImportState &ImportState); |
| 489 | bool ParseTopLevelDecl() { |
| 490 | DeclGroupPtrTy Result; |
| 491 | Sema::ModuleImportState IS = Sema::ModuleImportState::NotACXX20Module; |
| 492 | return ParseTopLevelDecl(Result, IS); |
| 493 | } |
| 494 | |
| 495 | /// ConsumeToken - Consume the current 'peek token' and lex the next one. |
| 496 | /// This does not work with special tokens: string literals, code completion, |
| 497 | /// annotation tokens and balanced tokens must be handled using the specific |
| 498 | /// consume methods. |
| 499 | /// Returns the location of the consumed token. |
| 500 | SourceLocation ConsumeToken() { |
| 501 | assert(!isTokenSpecial() && |
| 502 | "Should consume special tokens with Consume*Token"); |
| 503 | PrevTokLocation = Tok.getLocation(); |
| 504 | PP.Lex(Tok); |
| 505 | return PrevTokLocation; |
| 506 | } |
| 507 | |
| 508 | bool TryConsumeToken(tok::TokenKind Expected) { |
| 509 | if (Tok.isNot(Expected)) |
| 510 | return false; |
| 511 | assert(!isTokenSpecial() && |
| 512 | "Should consume special tokens with Consume*Token"); |
| 513 | PrevTokLocation = Tok.getLocation(); |
| 514 | PP.Lex(Tok); |
| 515 | return true; |
| 516 | } |
| 517 | |
| 518 | bool TryConsumeToken(tok::TokenKind Expected, SourceLocation &Loc) { |
| 519 | if (!TryConsumeToken(Expected)) |
| 520 | return false; |
| 521 | Loc = PrevTokLocation; |
| 522 | return true; |
| 523 | } |
| 524 | |
| 525 | /// ConsumeAnyToken - Dispatch to the right Consume* method based on the |
| 526 | /// current token type. This should only be used in cases where the type of |
| 527 | /// the token really isn't known, e.g. in error recovery. |
| 528 | SourceLocation ConsumeAnyToken(bool ConsumeCodeCompletionTok = false) { |
| 529 | if (isTokenParen()) |
| 530 | return ConsumeParen(); |
| 531 | if (isTokenBracket()) |
| 532 | return ConsumeBracket(); |
| 533 | if (isTokenBrace()) |
| 534 | return ConsumeBrace(); |
| 535 | if (isTokenStringLiteral()) |
| 536 | return ConsumeStringToken(); |
| 537 | if (Tok.is(tok::code_completion)) |
| 538 | return ConsumeCodeCompletionTok ? ConsumeCodeCompletionToken() |
| 539 | : handleUnexpectedCodeCompletionToken(); |
| 540 | if (Tok.isAnnotation()) |
| 541 | return ConsumeAnnotationToken(); |
| 542 | return ConsumeToken(); |
| 543 | } |
| 544 | |
| 545 | |
| 546 | SourceLocation getEndOfPreviousToken() { |
| 547 | return PP.getLocForEndOfToken(PrevTokLocation); |
| 548 | } |
| 549 | |
| 550 | /// Retrieve the underscored keyword (_Nonnull, _Nullable) that corresponds |
| 551 | /// to the given nullability kind. |
| 552 | IdentifierInfo *getNullabilityKeyword(NullabilityKind nullability) { |
| 553 | return Actions.getNullabilityKeyword(nullability); |
| 554 | } |
| 555 | |
| 556 | private: |
| 557 | //===--------------------------------------------------------------------===// |
| 558 | // Low-Level token peeking and consumption methods. |
| 559 | // |
| 560 | |
| 561 | /// isTokenParen - Return true if the cur token is '(' or ')'. |
| 562 | bool isTokenParen() const { |
| 563 | return Tok.isOneOf(tok::l_paren, tok::r_paren); |
| 564 | } |
| 565 | /// isTokenBracket - Return true if the cur token is '[' or ']'. |
| 566 | bool isTokenBracket() const { |
| 567 | return Tok.isOneOf(tok::l_square, tok::r_square); |
| 568 | } |
| 569 | /// isTokenBrace - Return true if the cur token is '{' or '}'. |
| 570 | bool isTokenBrace() const { |
| 571 | return Tok.isOneOf(tok::l_brace, tok::r_brace); |
| 572 | } |
| 573 | /// isTokenStringLiteral - True if this token is a string-literal. |
| 574 | bool isTokenStringLiteral() const { |
| 575 | return tok::isStringLiteral(Tok.getKind()); |
| 576 | } |
| 577 | /// isTokenSpecial - True if this token requires special consumption methods. |
| 578 | bool isTokenSpecial() const { |
| 579 | return isTokenStringLiteral() || isTokenParen() || isTokenBracket() || |
| 580 | isTokenBrace() || Tok.is(tok::code_completion) || Tok.isAnnotation(); |
| 581 | } |
| 582 | |
| 583 | /// Returns true if the current token is '=' or is a type of '='. |
| 584 | /// For typos, give a fixit to '=' |
| 585 | bool isTokenEqualOrEqualTypo(); |
| 586 | |
| 587 | /// Return the current token to the token stream and make the given |
| 588 | /// token the current token. |
| 589 | void UnconsumeToken(Token &Consumed) { |
| 590 | Token Next = Tok; |
| 591 | PP.EnterToken(Consumed, /*IsReinject*/true); |
| 592 | PP.Lex(Tok); |
| 593 | PP.EnterToken(Next, /*IsReinject*/true); |
| 594 | } |
| 595 | |
| 596 | SourceLocation ConsumeAnnotationToken() { |
| 597 | assert(Tok.isAnnotation() && "wrong consume method"); |
| 598 | SourceLocation Loc = Tok.getLocation(); |
| 599 | PrevTokLocation = Tok.getAnnotationEndLoc(); |
| 600 | PP.Lex(Tok); |
| 601 | return Loc; |
| 602 | } |
| 603 | |
| 604 | /// ConsumeParen - This consume method keeps the paren count up-to-date. |
| 605 | /// |
| 606 | SourceLocation ConsumeParen() { |
| 607 | assert(isTokenParen() && "wrong consume method"); |
| 608 | if (Tok.getKind() == tok::l_paren) |
| 609 | ++ParenCount; |
| 610 | else if (ParenCount) { |
| 611 | AngleBrackets.clear(*this); |
| 612 | --ParenCount; // Don't let unbalanced )'s drive the count negative. |
| 613 | } |
| 614 | PrevTokLocation = Tok.getLocation(); |
| 615 | PP.Lex(Tok); |
| 616 | return PrevTokLocation; |
| 617 | } |
| 618 | |
| 619 | /// ConsumeBracket - This consume method keeps the bracket count up-to-date. |
| 620 | /// |
| 621 | SourceLocation ConsumeBracket() { |
| 622 | assert(isTokenBracket() && "wrong consume method"); |
| 623 | if (Tok.getKind() == tok::l_square) |
| 624 | ++BracketCount; |
| 625 | else if (BracketCount) { |
| 626 | AngleBrackets.clear(*this); |
| 627 | --BracketCount; // Don't let unbalanced ]'s drive the count negative. |
| 628 | } |
| 629 | |
| 630 | PrevTokLocation = Tok.getLocation(); |
| 631 | PP.Lex(Tok); |
| 632 | return PrevTokLocation; |
| 633 | } |
| 634 | |
| 635 | /// ConsumeBrace - This consume method keeps the brace count up-to-date. |
| 636 | /// |
| 637 | SourceLocation ConsumeBrace() { |
| 638 | assert(isTokenBrace() && "wrong consume method"); |
| 639 | if (Tok.getKind() == tok::l_brace) |
| 640 | ++BraceCount; |
| 641 | else if (BraceCount) { |
| 642 | AngleBrackets.clear(*this); |
| 643 | --BraceCount; // Don't let unbalanced }'s drive the count negative. |
| 644 | } |
| 645 | |
| 646 | PrevTokLocation = Tok.getLocation(); |
| 647 | PP.Lex(Tok); |
| 648 | return PrevTokLocation; |
| 649 | } |
| 650 | |
| 651 | /// ConsumeStringToken - Consume the current 'peek token', lexing a new one |
| 652 | /// and returning the token kind. This method is specific to strings, as it |
| 653 | /// handles string literal concatenation, as per C99 5.1.1.2, translation |
| 654 | /// phase #6. |
| 655 | SourceLocation ConsumeStringToken() { |
| 656 | assert(isTokenStringLiteral() && |
| 657 | "Should only consume string literals with this method"); |
| 658 | PrevTokLocation = Tok.getLocation(); |
| 659 | PP.Lex(Tok); |
| 660 | return PrevTokLocation; |
| 661 | } |
| 662 | |
| 663 | /// Consume the current code-completion token. |
| 664 | /// |
| 665 | /// This routine can be called to consume the code-completion token and |
| 666 | /// continue processing in special cases where \c cutOffParsing() isn't |
| 667 | /// desired, such as token caching or completion with lookahead. |
| 668 | SourceLocation ConsumeCodeCompletionToken() { |
| 669 | assert(Tok.is(tok::code_completion)); |
| 670 | PrevTokLocation = Tok.getLocation(); |
| 671 | PP.Lex(Tok); |
| 672 | return PrevTokLocation; |
| 673 | } |
| 674 | |
| 675 | ///\ brief When we are consuming a code-completion token without having |
| 676 | /// matched specific position in the grammar, provide code-completion results |
| 677 | /// based on context. |
| 678 | /// |
| 679 | /// \returns the source location of the code-completion token. |
| 680 | SourceLocation handleUnexpectedCodeCompletionToken(); |
| 681 | |
| 682 | /// Abruptly cut off parsing; mainly used when we have reached the |
| 683 | /// code-completion point. |
| 684 | void cutOffParsing() { |
| 685 | if (PP.isCodeCompletionEnabled()) |
| 686 | PP.setCodeCompletionReached(); |
| 687 | // Cut off parsing by acting as if we reached the end-of-file. |
| 688 | Tok.setKind(tok::eof); |
| 689 | } |
| 690 | |
| 691 | /// Determine if we're at the end of the file or at a transition |
| 692 | /// between modules. |
| 693 | bool isEofOrEom() { |
| 694 | tok::TokenKind Kind = Tok.getKind(); |
| 695 | return Kind == tok::eof || Kind == tok::annot_module_begin || |
| 696 | Kind == tok::annot_module_end || Kind == tok::annot_module_include || |
| 697 | Kind == tok::annot_repl_input_end; |
| 698 | } |
| 699 | |
| 700 | /// Checks if the \p Level is valid for use in a fold expression. |
| 701 | bool isFoldOperator(prec::Level Level) const; |
| 702 | |
| 703 | /// Checks if the \p Kind is a valid operator for fold expressions. |
| 704 | bool isFoldOperator(tok::TokenKind Kind) const; |
| 705 | |
| 706 | /// Initialize all pragma handlers. |
| 707 | void initializePragmaHandlers(); |
| 708 | |
| 709 | /// Destroy and reset all pragma handlers. |
| 710 | void resetPragmaHandlers(); |
| 711 | |
| 712 | /// Handle the annotation token produced for #pragma unused(...) |
| 713 | void HandlePragmaUnused(); |
| 714 | |
| 715 | /// Handle the annotation token produced for |
| 716 | /// #pragma GCC visibility... |
| 717 | void HandlePragmaVisibility(); |
| 718 | |
| 719 | /// Handle the annotation token produced for |
| 720 | /// #pragma pack... |
| 721 | void HandlePragmaPack(); |
| 722 | |
| 723 | /// Handle the annotation token produced for |
| 724 | /// #pragma ms_struct... |
| 725 | void HandlePragmaMSStruct(); |
| 726 | |
| 727 | void HandlePragmaMSPointersToMembers(); |
| 728 | |
| 729 | void HandlePragmaMSVtorDisp(); |
| 730 | |
| 731 | void HandlePragmaMSPragma(); |
| 732 | bool HandlePragmaMSSection(StringRef PragmaName, |
| 733 | SourceLocation PragmaLocation); |
| 734 | bool HandlePragmaMSSegment(StringRef PragmaName, |
| 735 | SourceLocation PragmaLocation); |
| 736 | bool HandlePragmaMSInitSeg(StringRef PragmaName, |
| 737 | SourceLocation PragmaLocation); |
| 738 | bool HandlePragmaMSStrictGuardStackCheck(StringRef PragmaName, |
| 739 | SourceLocation PragmaLocation); |
| 740 | bool HandlePragmaMSFunction(StringRef PragmaName, |
| 741 | SourceLocation PragmaLocation); |
| 742 | bool HandlePragmaMSAllocText(StringRef PragmaName, |
| 743 | SourceLocation PragmaLocation); |
| 744 | bool HandlePragmaMSOptimize(StringRef PragmaName, |
| 745 | SourceLocation PragmaLocation); |
| 746 | |
| 747 | /// Handle the annotation token produced for |
| 748 | /// #pragma align... |
| 749 | void HandlePragmaAlign(); |
| 750 | |
| 751 | /// Handle the annotation token produced for |
| 752 | /// #pragma clang __debug dump... |
| 753 | void HandlePragmaDump(); |
| 754 | |
| 755 | /// Handle the annotation token produced for |
| 756 | /// #pragma weak id... |
| 757 | void HandlePragmaWeak(); |
| 758 | |
| 759 | /// Handle the annotation token produced for |
| 760 | /// #pragma weak id = id... |
| 761 | void HandlePragmaWeakAlias(); |
| 762 | |
| 763 | /// Handle the annotation token produced for |
| 764 | /// #pragma redefine_extname... |
| 765 | void HandlePragmaRedefineExtname(); |
| 766 | |
| 767 | /// Handle the annotation token produced for |
| 768 | /// #pragma STDC FP_CONTRACT... |
| 769 | void HandlePragmaFPContract(); |
| 770 | |
| 771 | /// Handle the annotation token produced for |
| 772 | /// #pragma STDC FENV_ACCESS... |
| 773 | void HandlePragmaFEnvAccess(); |
| 774 | |
| 775 | /// Handle the annotation token produced for |
| 776 | /// #pragma STDC FENV_ROUND... |
| 777 | void HandlePragmaFEnvRound(); |
| 778 | |
| 779 | /// Handle the annotation token produced for |
| 780 | /// #pragma float_control |
| 781 | void HandlePragmaFloatControl(); |
| 782 | |
| 783 | /// \brief Handle the annotation token produced for |
| 784 | /// #pragma clang fp ... |
| 785 | void HandlePragmaFP(); |
| 786 | |
| 787 | /// Handle the annotation token produced for |
| 788 | /// #pragma OPENCL EXTENSION... |
| 789 | void HandlePragmaOpenCLExtension(); |
| 790 | |
| 791 | /// Handle the annotation token produced for |
| 792 | /// #pragma clang __debug captured |
| 793 | StmtResult HandlePragmaCaptured(); |
| 794 | |
| 795 | /// Handle the annotation token produced for |
| 796 | /// #pragma clang loop and #pragma unroll. |
| 797 | bool HandlePragmaLoopHint(LoopHint &Hint); |
| 798 | |
| 799 | bool ParsePragmaAttributeSubjectMatchRuleSet( |
| 800 | attr::ParsedSubjectMatchRuleSet &SubjectMatchRules, |
| 801 | SourceLocation &AnyLoc, SourceLocation &LastMatchRuleEndLoc); |
| 802 | |
| 803 | void HandlePragmaAttribute(); |
| 804 | |
| 805 | /// GetLookAheadToken - This peeks ahead N tokens and returns that token |
| 806 | /// without consuming any tokens. LookAhead(0) returns 'Tok', LookAhead(1) |
| 807 | /// returns the token after Tok, etc. |
| 808 | /// |
| 809 | /// Note that this differs from the Preprocessor's LookAhead method, because |
| 810 | /// the Parser always has one token lexed that the preprocessor doesn't. |
| 811 | /// |
| 812 | const Token &GetLookAheadToken(unsigned N) { |
| 813 | if (N == 0 || Tok.is(tok::eof)) return Tok; |
| 814 | return PP.LookAhead(N-1); |
| 815 | } |
| 816 | |
| 817 | public: |
| 818 | /// NextToken - This peeks ahead one token and returns it without |
| 819 | /// consuming it. |
| 820 | const Token &NextToken() { |
| 821 | return PP.LookAhead(0); |
| 822 | } |
| 823 | |
| 824 | /// getTypeAnnotation - Read a parsed type out of an annotation token. |
| 825 | static TypeResult getTypeAnnotation(const Token &Tok) { |
| 826 | if (!Tok.getAnnotationValue()) |
| 827 | return TypeError(); |
| 828 | return ParsedType::getFromOpaquePtr(Tok.getAnnotationValue()); |
| 829 | } |
| 830 | |
| 831 | private: |
| 832 | static void setTypeAnnotation(Token &Tok, TypeResult T) { |
| 833 | assert((T.isInvalid() || T.get()) && |
| 834 | "produced a valid-but-null type annotation?"); |
| 835 | Tok.setAnnotationValue(T.isInvalid() ? nullptr : T.get().getAsOpaquePtr()); |
| 836 | } |
| 837 | |
| 838 | static NamedDecl *getNonTypeAnnotation(const Token &Tok) { |
| 839 | return static_cast<NamedDecl*>(Tok.getAnnotationValue()); |
| 840 | } |
| 841 | |
| 842 | static void setNonTypeAnnotation(Token &Tok, NamedDecl *ND) { |
| 843 | Tok.setAnnotationValue(ND); |
| 844 | } |
| 845 | |
| 846 | static IdentifierInfo *getIdentifierAnnotation(const Token &Tok) { |
| 847 | return static_cast<IdentifierInfo*>(Tok.getAnnotationValue()); |
| 848 | } |
| 849 | |
| 850 | static void setIdentifierAnnotation(Token &Tok, IdentifierInfo *ND) { |
| 851 | Tok.setAnnotationValue(ND); |
| 852 | } |
| 853 | |
| 854 | /// Read an already-translated primary expression out of an annotation |
| 855 | /// token. |
| 856 | static ExprResult getExprAnnotation(const Token &Tok) { |
| 857 | return ExprResult::getFromOpaquePointer(Tok.getAnnotationValue()); |
| 858 | } |
| 859 | |
| 860 | /// Set the primary expression corresponding to the given annotation |
| 861 | /// token. |
| 862 | static void setExprAnnotation(Token &Tok, ExprResult ER) { |
| 863 | Tok.setAnnotationValue(ER.getAsOpaquePointer()); |
| 864 | } |
| 865 | |
| 866 | public: |
| 867 | // If NeedType is true, then TryAnnotateTypeOrScopeToken will try harder to |
| 868 | // find a type name by attempting typo correction. |
| 869 | bool |
| 870 | TryAnnotateTypeOrScopeToken(ImplicitTypenameContext AllowImplicitTypename = |
| 871 | ImplicitTypenameContext::No); |
| 872 | bool TryAnnotateTypeOrScopeTokenAfterScopeSpec( |
| 873 | CXXScopeSpec &SS, bool IsNewScope, |
| 874 | ImplicitTypenameContext AllowImplicitTypename); |
| 875 | bool TryAnnotateCXXScopeToken(bool EnteringContext = false); |
| 876 | |
| 877 | bool MightBeCXXScopeToken() { |
| 878 | return getLangOpts().CPlusPlus && |
| 879 | (Tok.is(tok::identifier) || Tok.is(tok::coloncolon) || |
| 880 | (Tok.is(tok::annot_template_id) && |
| 881 | NextToken().is(tok::coloncolon)) || |
| 882 | Tok.is(tok::kw_decltype) || Tok.is(tok::kw___super)); |
| 883 | } |
| 884 | bool TryAnnotateOptionalCXXScopeToken(bool EnteringContext = false) { |
| 885 | return MightBeCXXScopeToken() && TryAnnotateCXXScopeToken(EnteringContext); |
| 886 | } |
| 887 | |
| 888 | private: |
| 889 | enum AnnotatedNameKind { |
| 890 | /// Annotation has failed and emitted an error. |
| 891 | ANK_Error, |
| 892 | /// The identifier is a tentatively-declared name. |
| 893 | ANK_TentativeDecl, |
| 894 | /// The identifier is a template name. FIXME: Add an annotation for that. |
| 895 | ANK_TemplateName, |
| 896 | /// The identifier can't be resolved. |
| 897 | ANK_Unresolved, |
| 898 | /// Annotation was successful. |
| 899 | ANK_Success |
| 900 | }; |
| 901 | |
| 902 | AnnotatedNameKind |
| 903 | TryAnnotateName(CorrectionCandidateCallback *CCC = nullptr, |
| 904 | ImplicitTypenameContext AllowImplicitTypename = |
| 905 | ImplicitTypenameContext::No); |
| 906 | |
| 907 | /// Push a tok::annot_cxxscope token onto the token stream. |
| 908 | void AnnotateScopeToken(CXXScopeSpec &SS, bool IsNewAnnotation); |
| 909 | |
| 910 | /// TryAltiVecToken - Check for context-sensitive AltiVec identifier tokens, |
| 911 | /// replacing them with the non-context-sensitive keywords. This returns |
| 912 | /// true if the token was replaced. |
| 913 | bool TryAltiVecToken(DeclSpec &DS, SourceLocation Loc, |
| 914 | const char *&PrevSpec, unsigned &DiagID, |
| 915 | bool &isInvalid) { |
| 916 | if (!getLangOpts().AltiVec && !getLangOpts().ZVector) |
| 917 | return false; |
| 918 | |
| 919 | if (Tok.getIdentifierInfo() != Ident_vector && |
| 920 | Tok.getIdentifierInfo() != Ident_bool && |
| 921 | Tok.getIdentifierInfo() != Ident_Bool && |
| 922 | (!getLangOpts().AltiVec || Tok.getIdentifierInfo() != Ident_pixel)) |
| 923 | return false; |
| 924 | |
| 925 | return TryAltiVecTokenOutOfLine(DS, Loc, PrevSpec, DiagID, isInvalid); |
| 926 | } |
| 927 | |
| 928 | /// TryAltiVecVectorToken - Check for context-sensitive AltiVec vector |
| 929 | /// identifier token, replacing it with the non-context-sensitive __vector. |
| 930 | /// This returns true if the token was replaced. |
| 931 | bool TryAltiVecVectorToken() { |
| 932 | if ((!getLangOpts().AltiVec && !getLangOpts().ZVector) || |
| 933 | Tok.getIdentifierInfo() != Ident_vector) return false; |
| 934 | return TryAltiVecVectorTokenOutOfLine(); |
| 935 | } |
| 936 | |
| 937 | bool TryAltiVecVectorTokenOutOfLine(); |
| 938 | bool TryAltiVecTokenOutOfLine(DeclSpec &DS, SourceLocation Loc, |
| 939 | const char *&PrevSpec, unsigned &DiagID, |
| 940 | bool &isInvalid); |
| 941 | |
| 942 | /// Returns true if the current token is the identifier 'instancetype'. |
| 943 | /// |
| 944 | /// Should only be used in Objective-C language modes. |
| 945 | bool isObjCInstancetype() { |
| 946 | assert(getLangOpts().ObjC); |
| 947 | if (Tok.isAnnotation()) |
| 948 | return false; |
| 949 | if (!Ident_instancetype) |
| 950 | Ident_instancetype = PP.getIdentifierInfo("instancetype"); |
| 951 | return Tok.getIdentifierInfo() == Ident_instancetype; |
| 952 | } |
| 953 | |
| 954 | /// TryKeywordIdentFallback - For compatibility with system headers using |
| 955 | /// keywords as identifiers, attempt to convert the current token to an |
| 956 | /// identifier and optionally disable the keyword for the remainder of the |
| 957 | /// translation unit. This returns false if the token was not replaced, |
| 958 | /// otherwise emits a diagnostic and returns true. |
| 959 | bool TryKeywordIdentFallback(bool DisableKeyword); |
| 960 | |
| 961 | /// Get the TemplateIdAnnotation from the token. |
| 962 | TemplateIdAnnotation *takeTemplateIdAnnotation(const Token &tok); |
| 963 | |
| 964 | /// TentativeParsingAction - An object that is used as a kind of "tentative |
| 965 | /// parsing transaction". It gets instantiated to mark the token position and |
| 966 | /// after the token consumption is done, Commit() or Revert() is called to |
| 967 | /// either "commit the consumed tokens" or revert to the previously marked |
| 968 | /// token position. Example: |
| 969 | /// |
| 970 | /// TentativeParsingAction TPA(*this); |
| 971 | /// ConsumeToken(); |
| 972 | /// .... |
| 973 | /// TPA.Revert(); |
| 974 | /// |
| 975 | class TentativeParsingAction { |
| 976 | Parser &P; |
| 977 | PreferredTypeBuilder PrevPreferredType; |
| 978 | Token PrevTok; |
| 979 | size_t PrevTentativelyDeclaredIdentifierCount; |
| 980 | unsigned short PrevParenCount, PrevBracketCount, PrevBraceCount; |
| 981 | bool isActive; |
| 982 | |
| 983 | public: |
| 984 | explicit TentativeParsingAction(Parser &p) |
| 985 | : P(p), PrevPreferredType(P.PreferredType) { |
| 986 | PrevTok = P.Tok; |
| 987 | PrevTentativelyDeclaredIdentifierCount = |
| 988 | P.TentativelyDeclaredIdentifiers.size(); |
| 989 | PrevParenCount = P.ParenCount; |
| 990 | PrevBracketCount = P.BracketCount; |
| 991 | PrevBraceCount = P.BraceCount; |
| 992 | P.PP.EnableBacktrackAtThisPos(); |
| 993 | isActive = true; |
| 994 | } |
| 995 | void Commit() { |
| 996 | assert(isActive && "Parsing action was finished!"); |
| 997 | P.TentativelyDeclaredIdentifiers.resize( |
| 998 | PrevTentativelyDeclaredIdentifierCount); |
| 999 | P.PP.CommitBacktrackedTokens(); |
| 1000 | isActive = false; |
| 1001 | } |
| 1002 | void Revert() { |
| 1003 | assert(isActive && "Parsing action was finished!"); |
| 1004 | P.PP.Backtrack(); |
| 1005 | P.PreferredType = PrevPreferredType; |
| 1006 | P.Tok = PrevTok; |
| 1007 | P.TentativelyDeclaredIdentifiers.resize( |
| 1008 | PrevTentativelyDeclaredIdentifierCount); |
| 1009 | P.ParenCount = PrevParenCount; |
| 1010 | P.BracketCount = PrevBracketCount; |
| 1011 | P.BraceCount = PrevBraceCount; |
| 1012 | isActive = false; |
| 1013 | } |
| 1014 | ~TentativeParsingAction() { |
| 1015 | assert(!isActive && "Forgot to call Commit or Revert!"); |
| 1016 | } |
| 1017 | }; |
| 1018 | /// A TentativeParsingAction that automatically reverts in its destructor. |
| 1019 | /// Useful for disambiguation parses that will always be reverted. |
| 1020 | class RevertingTentativeParsingAction |
| 1021 | : private Parser::TentativeParsingAction { |
| 1022 | public: |
| 1023 | RevertingTentativeParsingAction(Parser &P) |
| 1024 | : Parser::TentativeParsingAction(P) {} |
| 1025 | ~RevertingTentativeParsingAction() { Revert(); } |
| 1026 | }; |
| 1027 | |
| 1028 | class UnannotatedTentativeParsingAction; |
| 1029 | |
| 1030 | /// ObjCDeclContextSwitch - An object used to switch context from |
| 1031 | /// an objective-c decl context to its enclosing decl context and |
| 1032 | /// back. |
| 1033 | class ObjCDeclContextSwitch { |
| 1034 | Parser &P; |
| 1035 | ObjCContainerDecl *DC; |
| 1036 | SaveAndRestore<bool> WithinObjCContainer; |
| 1037 | public: |
| 1038 | explicit ObjCDeclContextSwitch(Parser &p) |
| 1039 | : P(p), DC(p.getObjCDeclContext()), |
| 1040 | WithinObjCContainer(P.ParsingInObjCContainer, DC != nullptr) { |
| 1041 | if (DC) |
| 1042 | P.Actions.ActOnObjCTemporaryExitContainerContext(DC); |
| 1043 | } |
| 1044 | ~ObjCDeclContextSwitch() { |
| 1045 | if (DC) |
| 1046 | P.Actions.ActOnObjCReenterContainerContext(DC); |
| 1047 | } |
| 1048 | }; |
| 1049 | |
| 1050 | /// ExpectAndConsume - The parser expects that 'ExpectedTok' is next in the |
| 1051 | /// input. If so, it is consumed and false is returned. |
| 1052 | /// |
| 1053 | /// If a trivial punctuator misspelling is encountered, a FixIt error |
| 1054 | /// diagnostic is issued and false is returned after recovery. |
| 1055 | /// |
| 1056 | /// If the input is malformed, this emits the specified diagnostic and true is |
| 1057 | /// returned. |
| 1058 | bool ExpectAndConsume(tok::TokenKind ExpectedTok, |
| 1059 | unsigned Diag = diag::err_expected, |
| 1060 | StringRef DiagMsg = ""); |
| 1061 | |
| 1062 | /// The parser expects a semicolon and, if present, will consume it. |
| 1063 | /// |
| 1064 | /// If the next token is not a semicolon, this emits the specified diagnostic, |
| 1065 | /// or, if there's just some closing-delimiter noise (e.g., ')' or ']') prior |
| 1066 | /// to the semicolon, consumes that extra token. |
| 1067 | bool ExpectAndConsumeSemi(unsigned DiagID , StringRef TokenUsed = ""); |
| 1068 | |
| 1069 | /// The kind of extra semi diagnostic to emit. |
| 1070 | enum ExtraSemiKind { |
| 1071 | OutsideFunction = 0, |
| 1072 | InsideStruct = 1, |
| 1073 | InstanceVariableList = 2, |
| 1074 | AfterMemberFunctionDefinition = 3 |
| 1075 | }; |
| 1076 | |
| 1077 | /// Consume any extra semi-colons until the end of the line. |
| 1078 | void ConsumeExtraSemi(ExtraSemiKind Kind, DeclSpec::TST T = TST_unspecified); |
| 1079 | |
| 1080 | /// Return false if the next token is an identifier. An 'expected identifier' |
| 1081 | /// error is emitted otherwise. |
| 1082 | /// |
| 1083 | /// The parser tries to recover from the error by checking if the next token |
| 1084 | /// is a C++ keyword when parsing Objective-C++. Return false if the recovery |
| 1085 | /// was successful. |
| 1086 | bool expectIdentifier(); |
| 1087 | |
| 1088 | /// Kinds of compound pseudo-tokens formed by a sequence of two real tokens. |
| 1089 | enum class CompoundToken { |
| 1090 | /// A '(' '{' beginning a statement-expression. |
| 1091 | StmtExprBegin, |
| 1092 | /// A '}' ')' ending a statement-expression. |
| 1093 | StmtExprEnd, |
| 1094 | /// A '[' '[' beginning a C++11 or C23 attribute. |
| 1095 | AttrBegin, |
| 1096 | /// A ']' ']' ending a C++11 or C23 attribute. |
| 1097 | AttrEnd, |
| 1098 | /// A '::' '*' forming a C++ pointer-to-member declaration. |
| 1099 | MemberPtr, |
| 1100 | }; |
| 1101 | |
| 1102 | /// Check that a compound operator was written in a "sensible" way, and warn |
| 1103 | /// if not. |
| 1104 | void checkCompoundToken(SourceLocation FirstTokLoc, |
| 1105 | tok::TokenKind FirstTokKind, CompoundToken Op); |
| 1106 | |
| 1107 | public: |
| 1108 | //===--------------------------------------------------------------------===// |
| 1109 | // Scope manipulation |
| 1110 | |
| 1111 | /// ParseScope - Introduces a new scope for parsing. The kind of |
| 1112 | /// scope is determined by ScopeFlags. Objects of this type should |
| 1113 | /// be created on the stack to coincide with the position where the |
| 1114 | /// parser enters the new scope, and this object's constructor will |
| 1115 | /// create that new scope. Similarly, once the object is destroyed |
| 1116 | /// the parser will exit the scope. |
| 1117 | class ParseScope { |
| 1118 | Parser *Self; |
| 1119 | ParseScope(const ParseScope &) = delete; |
| 1120 | void operator=(const ParseScope &) = delete; |
| 1121 | |
| 1122 | public: |
| 1123 | // ParseScope - Construct a new object to manage a scope in the |
| 1124 | // parser Self where the new Scope is created with the flags |
| 1125 | // ScopeFlags, but only when we aren't about to enter a compound statement. |
| 1126 | ParseScope(Parser *Self, unsigned ScopeFlags, bool EnteredScope = true, |
| 1127 | bool BeforeCompoundStmt = false) |
| 1128 | : Self(Self) { |
| 1129 | if (EnteredScope && !BeforeCompoundStmt) |
| 1130 | Self->EnterScope(ScopeFlags); |
| 1131 | else { |
| 1132 | if (BeforeCompoundStmt) |
| 1133 | Self->incrementMSManglingNumber(); |
| 1134 | |
| 1135 | this->Self = nullptr; |
| 1136 | } |
| 1137 | } |
| 1138 | |
| 1139 | // Exit - Exit the scope associated with this object now, rather |
| 1140 | // than waiting until the object is destroyed. |
| 1141 | void Exit() { |
| 1142 | if (Self) { |
| 1143 | Self->ExitScope(); |
| 1144 | Self = nullptr; |
| 1145 | } |
| 1146 | } |
| 1147 | |
| 1148 | ~ParseScope() { |
| 1149 | Exit(); |
| 1150 | } |
| 1151 | }; |
| 1152 | |
| 1153 | /// Introduces zero or more scopes for parsing. The scopes will all be exited |
| 1154 | /// when the object is destroyed. |
| 1155 | class MultiParseScope { |
| 1156 | Parser &Self; |
| 1157 | unsigned NumScopes = 0; |
| 1158 | |
| 1159 | MultiParseScope(const MultiParseScope&) = delete; |
| 1160 | |
| 1161 | public: |
| 1162 | MultiParseScope(Parser &Self) : Self(Self) {} |
| 1163 | void Enter(unsigned ScopeFlags) { |
| 1164 | Self.EnterScope(ScopeFlags); |
| 1165 | ++NumScopes; |
| 1166 | } |
| 1167 | void Exit() { |
| 1168 | while (NumScopes) { |
| 1169 | Self.ExitScope(); |
| 1170 | --NumScopes; |
| 1171 | } |
| 1172 | } |
| 1173 | ~MultiParseScope() { |
| 1174 | Exit(); |
| 1175 | } |
| 1176 | }; |
| 1177 | |
| 1178 | /// EnterScope - Start a new scope. |
| 1179 | void EnterScope(unsigned ScopeFlags); |
| 1180 | |
| 1181 | /// ExitScope - Pop a scope off the scope stack. |
| 1182 | void ExitScope(); |
| 1183 | |
| 1184 | /// Re-enter the template scopes for a declaration that might be a template. |
| 1185 | unsigned ReenterTemplateScopes(MultiParseScope &S, Decl *D); |
| 1186 | |
| 1187 | private: |
| 1188 | /// RAII object used to modify the scope flags for the current scope. |
| 1189 | class ParseScopeFlags { |
| 1190 | Scope *CurScope; |
| 1191 | unsigned OldFlags = 0; |
| 1192 | ParseScopeFlags(const ParseScopeFlags &) = delete; |
| 1193 | void operator=(const ParseScopeFlags &) = delete; |
| 1194 | |
| 1195 | public: |
| 1196 | ParseScopeFlags(Parser *Self, unsigned ScopeFlags, bool ManageFlags = true); |
| 1197 | ~ParseScopeFlags(); |
| 1198 | }; |
| 1199 | |
| 1200 | //===--------------------------------------------------------------------===// |
| 1201 | // Diagnostic Emission and Error recovery. |
| 1202 | |
| 1203 | public: |
| 1204 | DiagnosticBuilder Diag(SourceLocation Loc, unsigned DiagID); |
| 1205 | DiagnosticBuilder Diag(const Token &Tok, unsigned DiagID); |
| 1206 | DiagnosticBuilder Diag(unsigned DiagID) { |
| 1207 | return Diag(Tok, DiagID); |
| 1208 | } |
| 1209 | |
| 1210 | private: |
| 1211 | void SuggestParentheses(SourceLocation Loc, unsigned DK, |
| 1212 | SourceRange ParenRange); |
| 1213 | void CheckNestedObjCContexts(SourceLocation AtLoc); |
| 1214 | |
| 1215 | public: |
| 1216 | |
| 1217 | /// Control flags for SkipUntil functions. |
| 1218 | enum SkipUntilFlags { |
| 1219 | StopAtSemi = 1 << 0, ///< Stop skipping at semicolon |
| 1220 | /// Stop skipping at specified token, but don't skip the token itself |
| 1221 | StopBeforeMatch = 1 << 1, |
| 1222 | StopAtCodeCompletion = 1 << 2 ///< Stop at code completion |
| 1223 | }; |
| 1224 | |
| 1225 | friend constexpr SkipUntilFlags operator|(SkipUntilFlags L, |
| 1226 | SkipUntilFlags R) { |
| 1227 | return static_cast<SkipUntilFlags>(static_cast<unsigned>(L) | |
| 1228 | static_cast<unsigned>(R)); |
| 1229 | } |
| 1230 | |
| 1231 | /// SkipUntil - Read tokens until we get to the specified token, then consume |
| 1232 | /// it (unless StopBeforeMatch is specified). Because we cannot guarantee |
| 1233 | /// that the token will ever occur, this skips to the next token, or to some |
| 1234 | /// likely good stopping point. If Flags has StopAtSemi flag, skipping will |
| 1235 | /// stop at a ';' character. Balances (), [], and {} delimiter tokens while |
| 1236 | /// skipping. |
| 1237 | /// |
| 1238 | /// If SkipUntil finds the specified token, it returns true, otherwise it |
| 1239 | /// returns false. |
| 1240 | bool SkipUntil(tok::TokenKind T, |
| 1241 | SkipUntilFlags Flags = static_cast<SkipUntilFlags>(0)) { |
| 1242 | return SkipUntil(llvm::ArrayRef(T), Flags); |
| 1243 | } |
| 1244 | bool SkipUntil(tok::TokenKind T1, tok::TokenKind T2, |
| 1245 | SkipUntilFlags Flags = static_cast<SkipUntilFlags>(0)) { |
| 1246 | tok::TokenKind TokArray[] = {T1, T2}; |
| 1247 | return SkipUntil(TokArray, Flags); |
| 1248 | } |
| 1249 | bool SkipUntil(tok::TokenKind T1, tok::TokenKind T2, tok::TokenKind T3, |
| 1250 | SkipUntilFlags Flags = static_cast<SkipUntilFlags>(0)) { |
| 1251 | tok::TokenKind TokArray[] = {T1, T2, T3}; |
| 1252 | return SkipUntil(TokArray, Flags); |
| 1253 | } |
| 1254 | bool SkipUntil(ArrayRef<tok::TokenKind> Toks, |
| 1255 | SkipUntilFlags Flags = static_cast<SkipUntilFlags>(0)); |
| 1256 | |
| 1257 | /// SkipMalformedDecl - Read tokens until we get to some likely good stopping |
| 1258 | /// point for skipping past a simple-declaration. |
| 1259 | void SkipMalformedDecl(); |
| 1260 | |
| 1261 | /// The location of the first statement inside an else that might |
| 1262 | /// have a missleading indentation. If there is no |
| 1263 | /// MisleadingIndentationChecker on an else active, this location is invalid. |
| 1264 | SourceLocation MisleadingIndentationElseLoc; |
| 1265 | |
| 1266 | private: |
| 1267 | //===--------------------------------------------------------------------===// |
| 1268 | // Lexing and parsing of C++ inline methods. |
| 1269 | |
| 1270 | struct ParsingClass; |
| 1271 | |
| 1272 | /// [class.mem]p1: "... the class is regarded as complete within |
| 1273 | /// - function bodies |
| 1274 | /// - default arguments |
| 1275 | /// - exception-specifications (TODO: C++0x) |
| 1276 | /// - and brace-or-equal-initializers for non-static data members |
| 1277 | /// (including such things in nested classes)." |
| 1278 | /// LateParsedDeclarations build the tree of those elements so they can |
| 1279 | /// be parsed after parsing the top-level class. |
| 1280 | class LateParsedDeclaration { |
| 1281 | public: |
| 1282 | virtual ~LateParsedDeclaration(); |
| 1283 | |
| 1284 | virtual void ParseLexedMethodDeclarations(); |
| 1285 | virtual void ParseLexedMemberInitializers(); |
| 1286 | virtual void ParseLexedMethodDefs(); |
| 1287 | virtual void ParseLexedAttributes(); |
| 1288 | virtual void ParseLexedPragmas(); |
| 1289 | }; |
| 1290 | |
| 1291 | /// Inner node of the LateParsedDeclaration tree that parses |
| 1292 | /// all its members recursively. |
| 1293 | class LateParsedClass : public LateParsedDeclaration { |
| 1294 | public: |
| 1295 | LateParsedClass(Parser *P, ParsingClass *C); |
| 1296 | ~LateParsedClass() override; |
| 1297 | |
| 1298 | void ParseLexedMethodDeclarations() override; |
| 1299 | void ParseLexedMemberInitializers() override; |
| 1300 | void ParseLexedMethodDefs() override; |
| 1301 | void ParseLexedAttributes() override; |
| 1302 | void ParseLexedPragmas() override; |
| 1303 | |
| 1304 | private: |
| 1305 | Parser *Self; |
| 1306 | ParsingClass *Class; |
| 1307 | }; |
| 1308 | |
| 1309 | /// Contains the lexed tokens of an attribute with arguments that |
| 1310 | /// may reference member variables and so need to be parsed at the |
| 1311 | /// end of the class declaration after parsing all other member |
| 1312 | /// member declarations. |
| 1313 | /// FIXME: Perhaps we should change the name of LateParsedDeclaration to |
| 1314 | /// LateParsedTokens. |
| 1315 | struct LateParsedAttribute : public LateParsedDeclaration { |
| 1316 | Parser *Self; |
| 1317 | CachedTokens Toks; |
| 1318 | IdentifierInfo &AttrName; |
| 1319 | IdentifierInfo *MacroII = nullptr; |
| 1320 | SourceLocation AttrNameLoc; |
| 1321 | SmallVector<Decl*, 2> Decls; |
| 1322 | |
| 1323 | explicit LateParsedAttribute(Parser *P, IdentifierInfo &Name, |
| 1324 | SourceLocation Loc) |
| 1325 | : Self(P), AttrName(Name), AttrNameLoc(Loc) {} |
| 1326 | |
| 1327 | void ParseLexedAttributes() override; |
| 1328 | |
| 1329 | void addDecl(Decl *D) { Decls.push_back(D); } |
| 1330 | }; |
| 1331 | |
| 1332 | /// Contains the lexed tokens of a pragma with arguments that |
| 1333 | /// may reference member variables and so need to be parsed at the |
| 1334 | /// end of the class declaration after parsing all other member |
| 1335 | /// member declarations. |
| 1336 | class LateParsedPragma : public LateParsedDeclaration { |
| 1337 | Parser *Self = nullptr; |
| 1338 | AccessSpecifier AS = AS_none; |
| 1339 | CachedTokens Toks; |
| 1340 | |
| 1341 | public: |
| 1342 | explicit LateParsedPragma(Parser *P, AccessSpecifier AS) |
| 1343 | : Self(P), AS(AS) {} |
| 1344 | |
| 1345 | void takeToks(CachedTokens &Cached) { Toks.swap(Cached); } |
| 1346 | const CachedTokens &toks() const { return Toks; } |
| 1347 | AccessSpecifier getAccessSpecifier() const { return AS; } |
| 1348 | |
| 1349 | void ParseLexedPragmas() override; |
| 1350 | }; |
| 1351 | |
| 1352 | // A list of late-parsed attributes. Used by ParseGNUAttributes. |
| 1353 | class LateParsedAttrList: public SmallVector<LateParsedAttribute *, 2> { |
| 1354 | public: |
| 1355 | LateParsedAttrList(bool PSoon = false) : ParseSoon(PSoon) { } |
| 1356 | |
| 1357 | bool parseSoon() { return ParseSoon; } |
| 1358 | |
| 1359 | private: |
| 1360 | bool ParseSoon; // Are we planning to parse these shortly after creation? |
| 1361 | }; |
| 1362 | |
| 1363 | /// Contains the lexed tokens of a member function definition |
| 1364 | /// which needs to be parsed at the end of the class declaration |
| 1365 | /// after parsing all other member declarations. |
| 1366 | struct LexedMethod : public LateParsedDeclaration { |
| 1367 | Parser *Self; |
| 1368 | Decl *D; |
| 1369 | CachedTokens Toks; |
| 1370 | |
| 1371 | explicit LexedMethod(Parser *P, Decl *MD) : Self(P), D(MD) {} |
| 1372 | |
| 1373 | void ParseLexedMethodDefs() override; |
| 1374 | }; |
| 1375 | |
| 1376 | /// LateParsedDefaultArgument - Keeps track of a parameter that may |
| 1377 | /// have a default argument that cannot be parsed yet because it |
| 1378 | /// occurs within a member function declaration inside the class |
| 1379 | /// (C++ [class.mem]p2). |
| 1380 | struct LateParsedDefaultArgument { |
| 1381 | explicit LateParsedDefaultArgument(Decl *P, |
| 1382 | std::unique_ptr<CachedTokens> Toks = nullptr) |
| 1383 | : Param(P), Toks(std::move(Toks)) { } |
| 1384 | |
| 1385 | /// Param - The parameter declaration for this parameter. |
| 1386 | Decl *Param; |
| 1387 | |
| 1388 | /// Toks - The sequence of tokens that comprises the default |
| 1389 | /// argument expression, not including the '=' or the terminating |
| 1390 | /// ')' or ','. This will be NULL for parameters that have no |
| 1391 | /// default argument. |
| 1392 | std::unique_ptr<CachedTokens> Toks; |
| 1393 | }; |
| 1394 | |
| 1395 | /// LateParsedMethodDeclaration - A method declaration inside a class that |
| 1396 | /// contains at least one entity whose parsing needs to be delayed |
| 1397 | /// until the class itself is completely-defined, such as a default |
| 1398 | /// argument (C++ [class.mem]p2). |
| 1399 | struct LateParsedMethodDeclaration : public LateParsedDeclaration { |
| 1400 | explicit LateParsedMethodDeclaration(Parser *P, Decl *M) |
| 1401 | : Self(P), Method(M), ExceptionSpecTokens(nullptr) {} |
| 1402 | |
| 1403 | void ParseLexedMethodDeclarations() override; |
| 1404 | |
| 1405 | Parser *Self; |
| 1406 | |
| 1407 | /// Method - The method declaration. |
| 1408 | Decl *Method; |
| 1409 | |
| 1410 | /// DefaultArgs - Contains the parameters of the function and |
| 1411 | /// their default arguments. At least one of the parameters will |
| 1412 | /// have a default argument, but all of the parameters of the |
| 1413 | /// method will be stored so that they can be reintroduced into |
| 1414 | /// scope at the appropriate times. |
| 1415 | SmallVector<LateParsedDefaultArgument, 8> DefaultArgs; |
| 1416 | |
| 1417 | /// The set of tokens that make up an exception-specification that |
| 1418 | /// has not yet been parsed. |
| 1419 | CachedTokens *ExceptionSpecTokens; |
| 1420 | }; |
| 1421 | |
| 1422 | /// LateParsedMemberInitializer - An initializer for a non-static class data |
| 1423 | /// member whose parsing must to be delayed until the class is completely |
| 1424 | /// defined (C++11 [class.mem]p2). |
| 1425 | struct LateParsedMemberInitializer : public LateParsedDeclaration { |
| 1426 | LateParsedMemberInitializer(Parser *P, Decl *FD) |
| 1427 | : Self(P), Field(FD) { } |
| 1428 | |
| 1429 | void ParseLexedMemberInitializers() override; |
| 1430 | |
| 1431 | Parser *Self; |
| 1432 | |
| 1433 | /// Field - The field declaration. |
| 1434 | Decl *Field; |
| 1435 | |
| 1436 | /// CachedTokens - The sequence of tokens that comprises the initializer, |
| 1437 | /// including any leading '='. |
| 1438 | CachedTokens Toks; |
| 1439 | }; |
| 1440 | |
| 1441 | /// LateParsedDeclarationsContainer - During parsing of a top (non-nested) |
| 1442 | /// C++ class, its method declarations that contain parts that won't be |
| 1443 | /// parsed until after the definition is completed (C++ [class.mem]p2), |
| 1444 | /// the method declarations and possibly attached inline definitions |
| 1445 | /// will be stored here with the tokens that will be parsed to create those |
| 1446 | /// entities. |
| 1447 | typedef SmallVector<LateParsedDeclaration*,2> LateParsedDeclarationsContainer; |
| 1448 | |
| 1449 | /// Representation of a class that has been parsed, including |
| 1450 | /// any member function declarations or definitions that need to be |
| 1451 | /// parsed after the corresponding top-level class is complete. |
| 1452 | struct ParsingClass { |
| 1453 | ParsingClass(Decl *TagOrTemplate, bool TopLevelClass, bool IsInterface) |
| 1454 | : TopLevelClass(TopLevelClass), IsInterface(IsInterface), |
| 1455 | TagOrTemplate(TagOrTemplate) {} |
| 1456 | |
| 1457 | /// Whether this is a "top-level" class, meaning that it is |
| 1458 | /// not nested within another class. |
| 1459 | bool TopLevelClass : 1; |
| 1460 | |
| 1461 | /// Whether this class is an __interface. |
| 1462 | bool IsInterface : 1; |
| 1463 | |
| 1464 | /// The class or class template whose definition we are parsing. |
| 1465 | Decl *TagOrTemplate; |
| 1466 | |
| 1467 | /// LateParsedDeclarations - Method declarations, inline definitions and |
| 1468 | /// nested classes that contain pieces whose parsing will be delayed until |
| 1469 | /// the top-level class is fully defined. |
| 1470 | LateParsedDeclarationsContainer LateParsedDeclarations; |
| 1471 | }; |
| 1472 | |
| 1473 | /// The stack of classes that is currently being |
| 1474 | /// parsed. Nested and local classes will be pushed onto this stack |
| 1475 | /// when they are parsed, and removed afterward. |
| 1476 | std::stack<ParsingClass *> ClassStack; |
| 1477 | |
| 1478 | ParsingClass &getCurrentClass() { |
| 1479 | assert(!ClassStack.empty() && "No lexed method stacks!"); |
| 1480 | return *ClassStack.top(); |
| 1481 | } |
| 1482 | |
| 1483 | /// RAII object used to manage the parsing of a class definition. |
| 1484 | class ParsingClassDefinition { |
| 1485 | Parser &P; |
| 1486 | bool Popped; |
| 1487 | Sema::ParsingClassState State; |
| 1488 | |
| 1489 | public: |
| 1490 | ParsingClassDefinition(Parser &P, Decl *TagOrTemplate, bool TopLevelClass, |
| 1491 | bool IsInterface) |
| 1492 | : P(P), Popped(false), |
| 1493 | State(P.PushParsingClass(TagOrTemplate, TopLevelClass, IsInterface)) { |
| 1494 | } |
| 1495 | |
| 1496 | /// Pop this class of the stack. |
| 1497 | void Pop() { |
| 1498 | assert(!Popped && "Nested class has already been popped"); |
| 1499 | Popped = true; |
| 1500 | P.PopParsingClass(State); |
| 1501 | } |
| 1502 | |
| 1503 | ~ParsingClassDefinition() { |
| 1504 | if (!Popped) |
| 1505 | P.PopParsingClass(State); |
| 1506 | } |
| 1507 | }; |
| 1508 | |
| 1509 | /// Contains information about any template-specific |
| 1510 | /// information that has been parsed prior to parsing declaration |
| 1511 | /// specifiers. |
| 1512 | struct ParsedTemplateInfo { |
| 1513 | ParsedTemplateInfo() : Kind(NonTemplate), TemplateParams(nullptr) {} |
| 1514 | |
| 1515 | ParsedTemplateInfo(TemplateParameterLists *TemplateParams, |
| 1516 | bool isSpecialization, |
| 1517 | bool lastParameterListWasEmpty = false) |
| 1518 | : Kind(isSpecialization? ExplicitSpecialization : Template), |
| 1519 | TemplateParams(TemplateParams), |
| 1520 | LastParameterListWasEmpty(lastParameterListWasEmpty) { } |
| 1521 | |
| 1522 | explicit ParsedTemplateInfo(SourceLocation ExternLoc, |
| 1523 | SourceLocation TemplateLoc) |
| 1524 | : Kind(ExplicitInstantiation), TemplateParams(nullptr), |
| 1525 | ExternLoc(ExternLoc), TemplateLoc(TemplateLoc), |
| 1526 | LastParameterListWasEmpty(false){ } |
| 1527 | |
| 1528 | /// The kind of template we are parsing. |
| 1529 | enum { |
| 1530 | /// We are not parsing a template at all. |
| 1531 | NonTemplate = 0, |
| 1532 | /// We are parsing a template declaration. |
| 1533 | Template, |
| 1534 | /// We are parsing an explicit specialization. |
| 1535 | ExplicitSpecialization, |
| 1536 | /// We are parsing an explicit instantiation. |
| 1537 | ExplicitInstantiation |
| 1538 | } Kind; |
| 1539 | |
| 1540 | /// The template parameter lists, for template declarations |
| 1541 | /// and explicit specializations. |
| 1542 | TemplateParameterLists *TemplateParams; |
| 1543 | |
| 1544 | /// The location of the 'extern' keyword, if any, for an explicit |
| 1545 | /// instantiation |
| 1546 | SourceLocation ExternLoc; |
| 1547 | |
| 1548 | /// The location of the 'template' keyword, for an explicit |
| 1549 | /// instantiation. |
| 1550 | SourceLocation TemplateLoc; |
| 1551 | |
| 1552 | /// Whether the last template parameter list was empty. |
| 1553 | bool LastParameterListWasEmpty; |
| 1554 | |
| 1555 | SourceRange getSourceRange() const LLVM_READONLY; |
| 1556 | }; |
| 1557 | |
| 1558 | // In ParseCXXInlineMethods.cpp. |
| 1559 | struct ReenterTemplateScopeRAII; |
| 1560 | struct ReenterClassScopeRAII; |
| 1561 | |
| 1562 | void LexTemplateFunctionForLateParsing(CachedTokens &Toks); |
| 1563 | void ParseLateTemplatedFuncDef(LateParsedTemplate &LPT); |
| 1564 | |
| 1565 | static void LateTemplateParserCallback(void *P, LateParsedTemplate &LPT); |
| 1566 | |
| 1567 | Sema::ParsingClassState |
| 1568 | PushParsingClass(Decl *TagOrTemplate, bool TopLevelClass, bool IsInterface); |
| 1569 | void DeallocateParsedClasses(ParsingClass *Class); |
| 1570 | void PopParsingClass(Sema::ParsingClassState); |
| 1571 | |
| 1572 | enum CachedInitKind { |
| 1573 | CIK_DefaultArgument, |
| 1574 | CIK_DefaultInitializer |
| 1575 | }; |
| 1576 | |
| 1577 | NamedDecl *ParseCXXInlineMethodDef(AccessSpecifier AS, |
| 1578 | const ParsedAttributesView &AccessAttrs, |
| 1579 | ParsingDeclarator &D, |
| 1580 | const ParsedTemplateInfo &TemplateInfo, |
| 1581 | const VirtSpecifiers &VS, |
| 1582 | SourceLocation PureSpecLoc); |
| 1583 | void ParseCXXNonStaticMemberInitializer(Decl *VarD); |
| 1584 | void ParseLexedAttributes(ParsingClass &Class); |
| 1585 | void ParseLexedAttributeList(LateParsedAttrList &LAs, Decl *D, |
| 1586 | bool EnterScope, bool OnDefinition); |
| 1587 | void ParseLexedAttribute(LateParsedAttribute &LA, |
| 1588 | bool EnterScope, bool OnDefinition); |
| 1589 | void ParseLexedMethodDeclarations(ParsingClass &Class); |
| 1590 | void ParseLexedMethodDeclaration(LateParsedMethodDeclaration &LM); |
| 1591 | void ParseLexedMethodDefs(ParsingClass &Class); |
| 1592 | void ParseLexedMethodDef(LexedMethod &LM); |
| 1593 | void ParseLexedMemberInitializers(ParsingClass &Class); |
| 1594 | void ParseLexedMemberInitializer(LateParsedMemberInitializer &MI); |
| 1595 | void ParseLexedObjCMethodDefs(LexedMethod &LM, bool parseMethod); |
| 1596 | void ParseLexedPragmas(ParsingClass &Class); |
| 1597 | void ParseLexedPragma(LateParsedPragma &LP); |
| 1598 | bool ConsumeAndStoreFunctionPrologue(CachedTokens &Toks); |
| 1599 | bool ConsumeAndStoreInitializer(CachedTokens &Toks, CachedInitKind CIK); |
| 1600 | bool ConsumeAndStoreConditional(CachedTokens &Toks); |
| 1601 | bool ConsumeAndStoreUntil(tok::TokenKind T1, |
| 1602 | CachedTokens &Toks, |
| 1603 | bool StopAtSemi = true, |
| 1604 | bool ConsumeFinalToken = true) { |
| 1605 | return ConsumeAndStoreUntil(T1, T1, Toks, StopAtSemi, ConsumeFinalToken); |
| 1606 | } |
| 1607 | bool ConsumeAndStoreUntil(tok::TokenKind T1, tok::TokenKind T2, |
| 1608 | CachedTokens &Toks, |
| 1609 | bool StopAtSemi = true, |
| 1610 | bool ConsumeFinalToken = true); |
| 1611 | |
| 1612 | //===--------------------------------------------------------------------===// |
| 1613 | // C99 6.9: External Definitions. |
| 1614 | DeclGroupPtrTy ParseExternalDeclaration(ParsedAttributes &DeclAttrs, |
| 1615 | ParsedAttributes &DeclSpecAttrs, |
| 1616 | ParsingDeclSpec *DS = nullptr); |
| 1617 | bool isDeclarationAfterDeclarator(); |
| 1618 | bool isStartOfFunctionDefinition(const ParsingDeclarator &Declarator); |
| 1619 | DeclGroupPtrTy ParseDeclarationOrFunctionDefinition( |
| 1620 | ParsedAttributes &DeclAttrs, ParsedAttributes &DeclSpecAttrs, |
| 1621 | ParsingDeclSpec *DS = nullptr, AccessSpecifier AS = AS_none); |
| 1622 | DeclGroupPtrTy ParseDeclOrFunctionDefInternal(ParsedAttributes &Attrs, |
| 1623 | ParsedAttributes &DeclSpecAttrs, |
| 1624 | ParsingDeclSpec &DS, |
| 1625 | AccessSpecifier AS); |
| 1626 | |
| 1627 | void SkipFunctionBody(); |
| 1628 | Decl *ParseFunctionDefinition(ParsingDeclarator &D, |
| 1629 | const ParsedTemplateInfo &TemplateInfo = ParsedTemplateInfo(), |
| 1630 | LateParsedAttrList *LateParsedAttrs = nullptr); |
| 1631 | void ParseKNRParamDeclarations(Declarator &D); |
| 1632 | // EndLoc is filled with the location of the last token of the simple-asm. |
| 1633 | ExprResult ParseSimpleAsm(bool ForAsmLabel, SourceLocation *EndLoc); |
| 1634 | ExprResult ParseAsmStringLiteral(bool ForAsmLabel); |
| 1635 | |
| 1636 | // Objective-C External Declarations |
| 1637 | void MaybeSkipAttributes(tok::ObjCKeywordKind Kind); |
| 1638 | DeclGroupPtrTy ParseObjCAtDirectives(ParsedAttributes &DeclAttrs, |
| 1639 | ParsedAttributes &DeclSpecAttrs); |
| 1640 | DeclGroupPtrTy ParseObjCAtClassDeclaration(SourceLocation atLoc); |
| 1641 | Decl *ParseObjCAtInterfaceDeclaration(SourceLocation AtLoc, |
| 1642 | ParsedAttributes &prefixAttrs); |
| 1643 | class ObjCTypeParamListScope; |
| 1644 | ObjCTypeParamList *parseObjCTypeParamList(); |
| 1645 | ObjCTypeParamList *parseObjCTypeParamListOrProtocolRefs( |
| 1646 | ObjCTypeParamListScope &Scope, SourceLocation &lAngleLoc, |
| 1647 | SmallVectorImpl<IdentifierLocPair> &protocolIdents, |
| 1648 | SourceLocation &rAngleLoc, bool mayBeProtocolList = true); |
| 1649 | |
| 1650 | void HelperActionsForIvarDeclarations(ObjCContainerDecl *interfaceDecl, |
| 1651 | SourceLocation atLoc, |
| 1652 | BalancedDelimiterTracker &T, |
| 1653 | SmallVectorImpl<Decl *> &AllIvarDecls, |
| 1654 | bool RBraceMissing); |
| 1655 | void ParseObjCClassInstanceVariables(ObjCContainerDecl *interfaceDecl, |
| 1656 | tok::ObjCKeywordKind visibility, |
| 1657 | SourceLocation atLoc); |
| 1658 | bool ParseObjCProtocolReferences(SmallVectorImpl<Decl *> &P, |
| 1659 | SmallVectorImpl<SourceLocation> &PLocs, |
| 1660 | bool WarnOnDeclarations, |
| 1661 | bool ForObjCContainer, |
| 1662 | SourceLocation &LAngleLoc, |
| 1663 | SourceLocation &EndProtoLoc, |
| 1664 | bool consumeLastToken); |
| 1665 | |
| 1666 | /// Parse the first angle-bracket-delimited clause for an |
| 1667 | /// Objective-C object or object pointer type, which may be either |
| 1668 | /// type arguments or protocol qualifiers. |
| 1669 | void parseObjCTypeArgsOrProtocolQualifiers( |
| 1670 | ParsedType baseType, |
| 1671 | SourceLocation &typeArgsLAngleLoc, |
| 1672 | SmallVectorImpl<ParsedType> &typeArgs, |
| 1673 | SourceLocation &typeArgsRAngleLoc, |
| 1674 | SourceLocation &protocolLAngleLoc, |
| 1675 | SmallVectorImpl<Decl *> &protocols, |
| 1676 | SmallVectorImpl<SourceLocation> &protocolLocs, |
| 1677 | SourceLocation &protocolRAngleLoc, |
| 1678 | bool consumeLastToken, |
| 1679 | bool warnOnIncompleteProtocols); |
| 1680 | |
| 1681 | /// Parse either Objective-C type arguments or protocol qualifiers; if the |
| 1682 | /// former, also parse protocol qualifiers afterward. |
| 1683 | void parseObjCTypeArgsAndProtocolQualifiers( |
| 1684 | ParsedType baseType, |
| 1685 | SourceLocation &typeArgsLAngleLoc, |
| 1686 | SmallVectorImpl<ParsedType> &typeArgs, |
| 1687 | SourceLocation &typeArgsRAngleLoc, |
| 1688 | SourceLocation &protocolLAngleLoc, |
| 1689 | SmallVectorImpl<Decl *> &protocols, |
| 1690 | SmallVectorImpl<SourceLocation> &protocolLocs, |
| 1691 | SourceLocation &protocolRAngleLoc, |
| 1692 | bool consumeLastToken); |
| 1693 | |
| 1694 | /// Parse a protocol qualifier type such as '<NSCopying>', which is |
| 1695 | /// an anachronistic way of writing 'id<NSCopying>'. |
| 1696 | TypeResult parseObjCProtocolQualifierType(SourceLocation &rAngleLoc); |
| 1697 | |
| 1698 | /// Parse Objective-C type arguments and protocol qualifiers, extending the |
| 1699 | /// current type with the parsed result. |
| 1700 | TypeResult parseObjCTypeArgsAndProtocolQualifiers(SourceLocation loc, |
| 1701 | ParsedType type, |
| 1702 | bool consumeLastToken, |
| 1703 | SourceLocation &endLoc); |
| 1704 | |
| 1705 | void ParseObjCInterfaceDeclList(tok::ObjCKeywordKind contextKey, |
| 1706 | Decl *CDecl); |
| 1707 | DeclGroupPtrTy ParseObjCAtProtocolDeclaration(SourceLocation atLoc, |
| 1708 | ParsedAttributes &prefixAttrs); |
| 1709 | |
| 1710 | struct ObjCImplParsingDataRAII { |
| 1711 | Parser &P; |
| 1712 | Decl *Dcl; |
| 1713 | bool HasCFunction; |
| 1714 | typedef SmallVector<LexedMethod*, 8> LateParsedObjCMethodContainer; |
| 1715 | LateParsedObjCMethodContainer LateParsedObjCMethods; |
| 1716 | |
| 1717 | ObjCImplParsingDataRAII(Parser &parser, Decl *D) |
| 1718 | : P(parser), Dcl(D), HasCFunction(false) { |
| 1719 | P.CurParsedObjCImpl = this; |
| 1720 | Finished = false; |
| 1721 | } |
| 1722 | ~ObjCImplParsingDataRAII(); |
| 1723 | |
| 1724 | void finish(SourceRange AtEnd); |
| 1725 | bool isFinished() const { return Finished; } |
| 1726 | |
| 1727 | private: |
| 1728 | bool Finished; |
| 1729 | }; |
| 1730 | ObjCImplParsingDataRAII *CurParsedObjCImpl; |
| 1731 | void StashAwayMethodOrFunctionBodyTokens(Decl *MDecl); |
| 1732 | |
| 1733 | DeclGroupPtrTy ParseObjCAtImplementationDeclaration(SourceLocation AtLoc, |
| 1734 | ParsedAttributes &Attrs); |
| 1735 | DeclGroupPtrTy ParseObjCAtEndDeclaration(SourceRange atEnd); |
| 1736 | Decl *ParseObjCAtAliasDeclaration(SourceLocation atLoc); |
| 1737 | Decl *ParseObjCPropertySynthesize(SourceLocation atLoc); |
| 1738 | Decl *ParseObjCPropertyDynamic(SourceLocation atLoc); |
| 1739 | |
| 1740 | IdentifierInfo *ParseObjCSelectorPiece(SourceLocation &MethodLocation); |
| 1741 | // Definitions for Objective-c context sensitive keywords recognition. |
| 1742 | enum ObjCTypeQual { |
| 1743 | objc_in=0, objc_out, objc_inout, objc_oneway, objc_bycopy, objc_byref, |
| 1744 | objc_nonnull, objc_nullable, objc_null_unspecified, |
| 1745 | objc_NumQuals |
| 1746 | }; |
| 1747 | IdentifierInfo *ObjCTypeQuals[objc_NumQuals]; |
| 1748 | |
| 1749 | bool isTokIdentifier_in() const; |
| 1750 | |
| 1751 | ParsedType ParseObjCTypeName(ObjCDeclSpec &DS, DeclaratorContext Ctx, |
| 1752 | ParsedAttributes *ParamAttrs); |
| 1753 | Decl *ParseObjCMethodPrototype( |
| 1754 | tok::ObjCKeywordKind MethodImplKind = tok::objc_not_keyword, |
| 1755 | bool MethodDefinition = true); |
| 1756 | Decl *ParseObjCMethodDecl(SourceLocation mLoc, tok::TokenKind mType, |
| 1757 | tok::ObjCKeywordKind MethodImplKind = tok::objc_not_keyword, |
| 1758 | bool MethodDefinition=true); |
| 1759 | void ParseObjCPropertyAttribute(ObjCDeclSpec &DS); |
| 1760 | |
| 1761 | Decl *ParseObjCMethodDefinition(); |
| 1762 | |
| 1763 | public: |
| 1764 | //===--------------------------------------------------------------------===// |
| 1765 | // C99 6.5: Expressions. |
| 1766 | |
| 1767 | /// TypeCastState - State whether an expression is or may be a type cast. |
| 1768 | enum TypeCastState { |
| 1769 | NotTypeCast = 0, |
| 1770 | MaybeTypeCast, |
| 1771 | IsTypeCast |
| 1772 | }; |
| 1773 | |
| 1774 | ExprResult ParseExpression(TypeCastState isTypeCast = NotTypeCast); |
| 1775 | ExprResult ParseConstantExpressionInExprEvalContext( |
| 1776 | TypeCastState isTypeCast = NotTypeCast); |
| 1777 | ExprResult ParseConstantExpression(); |
| 1778 | ExprResult ParseCaseExpression(SourceLocation CaseLoc); |
| 1779 | ExprResult ParseConstraintExpression(); |
| 1780 | ExprResult |
| 1781 | ParseConstraintLogicalAndExpression(bool IsTrailingRequiresClause); |
| 1782 | ExprResult ParseConstraintLogicalOrExpression(bool IsTrailingRequiresClause); |
| 1783 | // Expr that doesn't include commas. |
| 1784 | ExprResult ParseAssignmentExpression(TypeCastState isTypeCast = NotTypeCast); |
| 1785 | |
| 1786 | ExprResult ParseMSAsmIdentifier(llvm::SmallVectorImpl<Token> &LineToks, |
| 1787 | unsigned &NumLineToksConsumed, |
| 1788 | bool IsUnevaluated); |
| 1789 | |
| 1790 | ExprResult ParseStringLiteralExpression(bool AllowUserDefinedLiteral = false); |
| 1791 | ExprResult ParseUnevaluatedStringLiteralExpression(); |
| 1792 | |
| 1793 | private: |
| 1794 | ExprResult ParseStringLiteralExpression(bool AllowUserDefinedLiteral, |
| 1795 | bool Unevaluated); |
| 1796 | |
| 1797 | ExprResult ParseExpressionWithLeadingAt(SourceLocation AtLoc); |
| 1798 | |
| 1799 | ExprResult ParseExpressionWithLeadingExtension(SourceLocation ExtLoc); |
| 1800 | |
| 1801 | ExprResult ParseRHSOfBinaryExpression(ExprResult LHS, |
| 1802 | prec::Level MinPrec); |
| 1803 | /// Control what ParseCastExpression will parse. |
| 1804 | enum CastParseKind { |
| 1805 | AnyCastExpr = 0, |
| 1806 | UnaryExprOnly, |
| 1807 | PrimaryExprOnly |
| 1808 | }; |
| 1809 | ExprResult ParseCastExpression(CastParseKind ParseKind, |
| 1810 | bool isAddressOfOperand, |
| 1811 | bool &NotCastExpr, |
| 1812 | TypeCastState isTypeCast, |
| 1813 | bool isVectorLiteral = false, |
| 1814 | bool *NotPrimaryExpression = nullptr); |
| 1815 | ExprResult ParseCastExpression(CastParseKind ParseKind, |
| 1816 | bool isAddressOfOperand = false, |
| 1817 | TypeCastState isTypeCast = NotTypeCast, |
| 1818 | bool isVectorLiteral = false, |
| 1819 | bool *NotPrimaryExpression = nullptr); |
| 1820 | |
| 1821 | /// Returns true if the next token cannot start an expression. |
| 1822 | bool isNotExpressionStart(); |
| 1823 | |
| 1824 | /// Returns true if the next token would start a postfix-expression |
| 1825 | /// suffix. |
| 1826 | bool isPostfixExpressionSuffixStart() { |
| 1827 | tok::TokenKind K = Tok.getKind(); |
| 1828 | return (K == tok::l_square || K == tok::l_paren || |
| 1829 | K == tok::period || K == tok::arrow || |
| 1830 | K == tok::plusplus || K == tok::minusminus); |
| 1831 | } |
| 1832 | |
| 1833 | bool diagnoseUnknownTemplateId(ExprResult TemplateName, SourceLocation Less); |
| 1834 | void checkPotentialAngleBracket(ExprResult &PotentialTemplateName); |
| 1835 | bool checkPotentialAngleBracketDelimiter(const AngleBracketTracker::Loc &, |
| 1836 | const Token &OpToken); |
| 1837 | bool checkPotentialAngleBracketDelimiter(const Token &OpToken) { |
| 1838 | if (auto *Info = AngleBrackets.getCurrent(*this)) |
| 1839 | return checkPotentialAngleBracketDelimiter(*Info, OpToken); |
| 1840 | return false; |
| 1841 | } |
| 1842 | |
| 1843 | ExprResult ParsePostfixExpressionSuffix(ExprResult LHS); |
| 1844 | ExprResult ParseUnaryExprOrTypeTraitExpression(); |
| 1845 | ExprResult ParseBuiltinPrimaryExpression(); |
| 1846 | ExprResult ParseSYCLUniqueStableNameExpression(); |
| 1847 | |
| 1848 | ExprResult ParseExprAfterUnaryExprOrTypeTrait(const Token &OpTok, |
| 1849 | bool &isCastExpr, |
| 1850 | ParsedType &CastTy, |
| 1851 | SourceRange &CastRange); |
| 1852 | |
| 1853 | /// ParseExpressionList - Used for C/C++ (argument-)expression-list. |
| 1854 | bool ParseExpressionList(SmallVectorImpl<Expr *> &Exprs, |
| 1855 | llvm::function_ref<void()> ExpressionStarts = |
| 1856 | llvm::function_ref<void()>(), |
| 1857 | bool FailImmediatelyOnInvalidExpr = false, |
| 1858 | bool EarlyTypoCorrection = false); |
| 1859 | |
| 1860 | /// ParseSimpleExpressionList - A simple comma-separated list of expressions, |
| 1861 | /// used for misc language extensions. |
| 1862 | bool ParseSimpleExpressionList(SmallVectorImpl<Expr *> &Exprs); |
| 1863 | |
| 1864 | /// ParenParseOption - Control what ParseParenExpression will parse. |
| 1865 | enum ParenParseOption { |
| 1866 | SimpleExpr, // Only parse '(' expression ')' |
| 1867 | FoldExpr, // Also allow fold-expression <anything> |
| 1868 | CompoundStmt, // Also allow '(' compound-statement ')' |
| 1869 | CompoundLiteral, // Also allow '(' type-name ')' '{' ... '}' |
| 1870 | CastExpr // Also allow '(' type-name ')' <anything> |
| 1871 | }; |
| 1872 | ExprResult ParseParenExpression(ParenParseOption &ExprType, |
| 1873 | bool stopIfCastExpr, |
| 1874 | bool isTypeCast, |
| 1875 | ParsedType &CastTy, |
| 1876 | SourceLocation &RParenLoc); |
| 1877 | |
| 1878 | ExprResult ParseCXXAmbiguousParenExpression( |
| 1879 | ParenParseOption &ExprType, ParsedType &CastTy, |
| 1880 | BalancedDelimiterTracker &Tracker, ColonProtectionRAIIObject &ColonProt); |
| 1881 | ExprResult ParseCompoundLiteralExpression(ParsedType Ty, |
| 1882 | SourceLocation LParenLoc, |
| 1883 | SourceLocation RParenLoc); |
| 1884 | |
| 1885 | ExprResult ParseGenericSelectionExpression(); |
| 1886 | |
| 1887 | ExprResult ParseObjCBoolLiteral(); |
| 1888 | |
| 1889 | ExprResult ParseFoldExpression(ExprResult LHS, BalancedDelimiterTracker &T); |
| 1890 | |
| 1891 | //===--------------------------------------------------------------------===// |
| 1892 | // C++ Expressions |
| 1893 | ExprResult tryParseCXXIdExpression(CXXScopeSpec &SS, bool isAddressOfOperand, |
| 1894 | Token &Replacement); |
| 1895 | ExprResult ParseCXXIdExpression(bool isAddressOfOperand = false); |
| 1896 | |
| 1897 | bool areTokensAdjacent(const Token &A, const Token &B); |
| 1898 | |
| 1899 | void CheckForTemplateAndDigraph(Token &Next, ParsedType ObjectTypePtr, |
| 1900 | bool EnteringContext, IdentifierInfo &II, |
| 1901 | CXXScopeSpec &SS); |
| 1902 | |
| 1903 | bool ParseOptionalCXXScopeSpecifier(CXXScopeSpec &SS, |
| 1904 | ParsedType ObjectType, |
| 1905 | bool ObjectHasErrors, |
| 1906 | bool EnteringContext, |
| 1907 | bool *MayBePseudoDestructor = nullptr, |
| 1908 | bool IsTypename = false, |
| 1909 | IdentifierInfo **LastII = nullptr, |
| 1910 | bool OnlyNamespace = false, |
| 1911 | bool InUsingDeclaration = false); |
| 1912 | |
| 1913 | //===--------------------------------------------------------------------===// |
| 1914 | // C++11 5.1.2: Lambda expressions |
| 1915 | |
| 1916 | /// Result of tentatively parsing a lambda-introducer. |
| 1917 | enum class LambdaIntroducerTentativeParse { |
| 1918 | /// This appears to be a lambda-introducer, which has been fully parsed. |
| 1919 | Success, |
| 1920 | /// This is a lambda-introducer, but has not been fully parsed, and this |
| 1921 | /// function needs to be called again to parse it. |
| 1922 | Incomplete, |
| 1923 | /// This is definitely an Objective-C message send expression, rather than |
| 1924 | /// a lambda-introducer, attribute-specifier, or array designator. |
| 1925 | MessageSend, |
| 1926 | /// This is not a lambda-introducer. |
| 1927 | Invalid, |
| 1928 | }; |
| 1929 | |
| 1930 | // [...] () -> type {...} |
| 1931 | ExprResult ParseLambdaExpression(); |
| 1932 | ExprResult TryParseLambdaExpression(); |
| 1933 | bool |
| 1934 | ParseLambdaIntroducer(LambdaIntroducer &Intro, |
| 1935 | LambdaIntroducerTentativeParse *Tentative = nullptr); |
| 1936 | ExprResult ParseLambdaExpressionAfterIntroducer(LambdaIntroducer &Intro); |
| 1937 | |
| 1938 | //===--------------------------------------------------------------------===// |
| 1939 | // C++ 5.2p1: C++ Casts |
| 1940 | ExprResult ParseCXXCasts(); |
| 1941 | |
| 1942 | /// Parse a __builtin_bit_cast(T, E), used to implement C++2a std::bit_cast. |
| 1943 | ExprResult ParseBuiltinBitCast(); |
| 1944 | |
| 1945 | //===--------------------------------------------------------------------===// |
| 1946 | // C++ 5.2p1: C++ Type Identification |
| 1947 | ExprResult ParseCXXTypeid(); |
| 1948 | |
| 1949 | //===--------------------------------------------------------------------===// |
| 1950 | // C++ : Microsoft __uuidof Expression |
| 1951 | ExprResult ParseCXXUuidof(); |
| 1952 | |
| 1953 | //===--------------------------------------------------------------------===// |
| 1954 | // C++ 5.2.4: C++ Pseudo-Destructor Expressions |
| 1955 | ExprResult ParseCXXPseudoDestructor(Expr *Base, SourceLocation OpLoc, |
| 1956 | tok::TokenKind OpKind, |
| 1957 | CXXScopeSpec &SS, |
| 1958 | ParsedType ObjectType); |
| 1959 | |
| 1960 | //===--------------------------------------------------------------------===// |
| 1961 | // C++ 9.3.2: C++ 'this' pointer |
| 1962 | ExprResult ParseCXXThis(); |
| 1963 | |
| 1964 | //===--------------------------------------------------------------------===// |
| 1965 | // C++ 15: C++ Throw Expression |
| 1966 | ExprResult ParseThrowExpression(); |
| 1967 | |
| 1968 | ExceptionSpecificationType tryParseExceptionSpecification( |
| 1969 | bool Delayed, |
| 1970 | SourceRange &SpecificationRange, |
| 1971 | SmallVectorImpl<ParsedType> &DynamicExceptions, |
| 1972 | SmallVectorImpl<SourceRange> &DynamicExceptionRanges, |
| 1973 | ExprResult &NoexceptExpr, |
| 1974 | CachedTokens *&ExceptionSpecTokens); |
| 1975 | |
| 1976 | // EndLoc is filled with the location of the last token of the specification. |
| 1977 | ExceptionSpecificationType ParseDynamicExceptionSpecification( |
| 1978 | SourceRange &SpecificationRange, |
| 1979 | SmallVectorImpl<ParsedType> &Exceptions, |
| 1980 | SmallVectorImpl<SourceRange> &Ranges); |
| 1981 | |
| 1982 | //===--------------------------------------------------------------------===// |
| 1983 | // C++0x 8: Function declaration trailing-return-type |
| 1984 | TypeResult ParseTrailingReturnType(SourceRange &Range, |
| 1985 | bool MayBeFollowedByDirectInit); |
| 1986 | |
| 1987 | //===--------------------------------------------------------------------===// |
| 1988 | // C++ 2.13.5: C++ Boolean Literals |
| 1989 | ExprResult ParseCXXBoolLiteral(); |
| 1990 | |
| 1991 | //===--------------------------------------------------------------------===// |
| 1992 | // C++ 5.2.3: Explicit type conversion (functional notation) |
| 1993 | ExprResult ParseCXXTypeConstructExpression(const DeclSpec &DS); |
| 1994 | |
| 1995 | /// ParseCXXSimpleTypeSpecifier - [C++ 7.1.5.2] Simple type specifiers. |
| 1996 | /// This should only be called when the current token is known to be part of |
| 1997 | /// simple-type-specifier. |
| 1998 | void ParseCXXSimpleTypeSpecifier(DeclSpec &DS); |
| 1999 | |
| 2000 | bool ParseCXXTypeSpecifierSeq( |
| 2001 | DeclSpec &DS, DeclaratorContext Context = DeclaratorContext::TypeName); |
| 2002 | |
| 2003 | //===--------------------------------------------------------------------===// |
| 2004 | // C++ 5.3.4 and 5.3.5: C++ new and delete |
| 2005 | bool ParseExpressionListOrTypeId(SmallVectorImpl<Expr*> &Exprs, |
| 2006 | Declarator &D); |
| 2007 | void ParseDirectNewDeclarator(Declarator &D); |
| 2008 | ExprResult ParseCXXNewExpression(bool UseGlobal, SourceLocation Start); |
| 2009 | ExprResult ParseCXXDeleteExpression(bool UseGlobal, |
| 2010 | SourceLocation Start); |
| 2011 | |
| 2012 | //===--------------------------------------------------------------------===// |
| 2013 | // C++ if/switch/while/for condition expression. |
| 2014 | struct ForRangeInfo; |
| 2015 | Sema::ConditionResult ParseCXXCondition(StmtResult *InitStmt, |
| 2016 | SourceLocation Loc, |
| 2017 | Sema::ConditionKind CK, |
| 2018 | bool MissingOK, |
| 2019 | ForRangeInfo *FRI = nullptr, |
| 2020 | bool EnterForConditionScope = false); |
| 2021 | DeclGroupPtrTy ParseAliasDeclarationInInitStatement(DeclaratorContext Context, |
| 2022 | ParsedAttributes &Attrs); |
| 2023 | |
| 2024 | //===--------------------------------------------------------------------===// |
| 2025 | // C++ Coroutines |
| 2026 | |
| 2027 | ExprResult ParseCoyieldExpression(); |
| 2028 | |
| 2029 | //===--------------------------------------------------------------------===// |
| 2030 | // C++ Concepts |
| 2031 | |
| 2032 | ExprResult ParseRequiresExpression(); |
| 2033 | void ParseTrailingRequiresClause(Declarator &D); |
| 2034 | |
| 2035 | //===--------------------------------------------------------------------===// |
| 2036 | // C99 6.7.8: Initialization. |
| 2037 | |
| 2038 | /// ParseInitializer |
| 2039 | /// initializer: [C99 6.7.8] |
| 2040 | /// assignment-expression |
| 2041 | /// '{' ... |
| 2042 | ExprResult ParseInitializer() { |
| 2043 | if (Tok.isNot(tok::l_brace)) |
| 2044 | return ParseAssignmentExpression(); |
| 2045 | return ParseBraceInitializer(); |
| 2046 | } |
| 2047 | bool MayBeDesignationStart(); |
| 2048 | ExprResult ParseBraceInitializer(); |
| 2049 | struct DesignatorCompletionInfo { |
| 2050 | SmallVectorImpl<Expr *> &InitExprs; |
| 2051 | QualType PreferredBaseType; |
| 2052 | }; |
| 2053 | ExprResult ParseInitializerWithPotentialDesignator(DesignatorCompletionInfo); |
| 2054 | |
| 2055 | //===--------------------------------------------------------------------===// |
| 2056 | // clang Expressions |
| 2057 | |
| 2058 | ExprResult ParseBlockLiteralExpression(); // ^{...} |
| 2059 | |
| 2060 | //===--------------------------------------------------------------------===// |
| 2061 | // Objective-C Expressions |
| 2062 | ExprResult ParseObjCAtExpression(SourceLocation AtLocation); |
| 2063 | ExprResult ParseObjCStringLiteral(SourceLocation AtLoc); |
| 2064 | ExprResult ParseObjCCharacterLiteral(SourceLocation AtLoc); |
| 2065 | ExprResult ParseObjCNumericLiteral(SourceLocation AtLoc); |
| 2066 | ExprResult ParseObjCBooleanLiteral(SourceLocation AtLoc, bool ArgValue); |
| 2067 | ExprResult ParseObjCArrayLiteral(SourceLocation AtLoc); |
| 2068 | ExprResult ParseObjCDictionaryLiteral(SourceLocation AtLoc); |
| 2069 | ExprResult ParseObjCBoxedExpr(SourceLocation AtLoc); |
| 2070 | ExprResult ParseObjCEncodeExpression(SourceLocation AtLoc); |
| 2071 | ExprResult ParseObjCSelectorExpression(SourceLocation AtLoc); |
| 2072 | ExprResult ParseObjCProtocolExpression(SourceLocation AtLoc); |
| 2073 | bool isSimpleObjCMessageExpression(); |
| 2074 | ExprResult ParseObjCMessageExpression(); |
| 2075 | ExprResult ParseObjCMessageExpressionBody(SourceLocation LBracloc, |
| 2076 | SourceLocation SuperLoc, |
| 2077 | ParsedType ReceiverType, |
| 2078 | Expr *ReceiverExpr); |
| 2079 | ExprResult ParseAssignmentExprWithObjCMessageExprStart( |
| 2080 | SourceLocation LBracloc, SourceLocation SuperLoc, |
| 2081 | ParsedType ReceiverType, Expr *ReceiverExpr); |
| 2082 | bool ParseObjCXXMessageReceiver(bool &IsExpr, void *&TypeOrExpr); |
| 2083 | |
| 2084 | //===--------------------------------------------------------------------===// |
| 2085 | // C99 6.8: Statements and Blocks. |
| 2086 | |
| 2087 | /// A SmallVector of expressions. |
| 2088 | typedef SmallVector<Expr*, 12> ExprVector; |
| 2089 | |
| 2090 | StmtResult |
| 2091 | ParseStatement(SourceLocation *TrailingElseLoc = nullptr, |
| 2092 | ParsedStmtContext StmtCtx = ParsedStmtContext::SubStmt); |
| 2093 | StmtResult ParseStatementOrDeclaration( |
| 2094 | StmtVector &Stmts, ParsedStmtContext StmtCtx, |
| 2095 | SourceLocation *TrailingElseLoc = nullptr); |
| 2096 | StmtResult ParseStatementOrDeclarationAfterAttributes( |
| 2097 | StmtVector &Stmts, ParsedStmtContext StmtCtx, |
| 2098 | SourceLocation *TrailingElseLoc, ParsedAttributes &DeclAttrs, |
| 2099 | ParsedAttributes &DeclSpecAttrs); |
| 2100 | StmtResult ParseExprStatement(ParsedStmtContext StmtCtx); |
| 2101 | StmtResult ParseLabeledStatement(ParsedAttributes &Attrs, |
| 2102 | ParsedStmtContext StmtCtx); |
| 2103 | StmtResult ParseCaseStatement(ParsedStmtContext StmtCtx, |
| 2104 | bool MissingCase = false, |
| 2105 | ExprResult Expr = ExprResult()); |
| 2106 | StmtResult ParseDefaultStatement(ParsedStmtContext StmtCtx); |
| 2107 | StmtResult ParseCompoundStatement(bool isStmtExpr = false); |
| 2108 | StmtResult ParseCompoundStatement(bool isStmtExpr, |
| 2109 | unsigned ScopeFlags); |
| 2110 | void ParseCompoundStatementLeadingPragmas(); |
| 2111 | void DiagnoseLabelAtEndOfCompoundStatement(); |
| 2112 | bool ConsumeNullStmt(StmtVector &Stmts); |
| 2113 | StmtResult ParseCompoundStatementBody(bool isStmtExpr = false); |
| 2114 | bool ParseParenExprOrCondition(StmtResult *InitStmt, |
| 2115 | Sema::ConditionResult &CondResult, |
| 2116 | SourceLocation Loc, Sema::ConditionKind CK, |
| 2117 | SourceLocation &LParenLoc, |
| 2118 | SourceLocation &RParenLoc); |
| 2119 | StmtResult ParseIfStatement(SourceLocation *TrailingElseLoc); |
| 2120 | StmtResult ParseSwitchStatement(SourceLocation *TrailingElseLoc); |
| 2121 | StmtResult ParseWhileStatement(SourceLocation *TrailingElseLoc); |
| 2122 | StmtResult ParseDoStatement(); |
| 2123 | StmtResult ParseForStatement(SourceLocation *TrailingElseLoc); |
| 2124 | StmtResult ParseGotoStatement(); |
| 2125 | StmtResult ParseContinueStatement(); |
| 2126 | StmtResult ParseBreakStatement(); |
| 2127 | StmtResult ParseReturnStatement(); |
| 2128 | StmtResult ParseAsmStatement(bool &msAsm); |
| 2129 | StmtResult ParseMicrosoftAsmStatement(SourceLocation AsmLoc); |
| 2130 | StmtResult ParsePragmaLoopHint(StmtVector &Stmts, ParsedStmtContext StmtCtx, |
| 2131 | SourceLocation *TrailingElseLoc, |
| 2132 | ParsedAttributes &Attrs); |
| 2133 | |
| 2134 | /// Describes the behavior that should be taken for an __if_exists |
| 2135 | /// block. |
| 2136 | enum IfExistsBehavior { |
| 2137 | /// Parse the block; this code is always used. |
| 2138 | IEB_Parse, |
| 2139 | /// Skip the block entirely; this code is never used. |
| 2140 | IEB_Skip, |
| 2141 | /// Parse the block as a dependent block, which may be used in |
| 2142 | /// some template instantiations but not others. |
| 2143 | IEB_Dependent |
| 2144 | }; |
| 2145 | |
| 2146 | /// Describes the condition of a Microsoft __if_exists or |
| 2147 | /// __if_not_exists block. |
| 2148 | struct IfExistsCondition { |
| 2149 | /// The location of the initial keyword. |
| 2150 | SourceLocation KeywordLoc; |
| 2151 | /// Whether this is an __if_exists block (rather than an |
| 2152 | /// __if_not_exists block). |
| 2153 | bool IsIfExists; |
| 2154 | |
| 2155 | /// Nested-name-specifier preceding the name. |
| 2156 | CXXScopeSpec SS; |
| 2157 | |
| 2158 | /// The name we're looking for. |
| 2159 | UnqualifiedId Name; |
| 2160 | |
| 2161 | /// The behavior of this __if_exists or __if_not_exists block |
| 2162 | /// should. |
| 2163 | IfExistsBehavior Behavior; |
| 2164 | }; |
| 2165 | |
| 2166 | bool ParseMicrosoftIfExistsCondition(IfExistsCondition& Result); |
| 2167 | void ParseMicrosoftIfExistsStatement(StmtVector &Stmts); |
| 2168 | void ParseMicrosoftIfExistsExternalDeclaration(); |
| 2169 | void ParseMicrosoftIfExistsClassDeclaration(DeclSpec::TST TagType, |
| 2170 | ParsedAttributes &AccessAttrs, |
| 2171 | AccessSpecifier &CurAS); |
| 2172 | bool ParseMicrosoftIfExistsBraceInitializer(ExprVector &InitExprs, |
| 2173 | bool &InitExprsOk); |
| 2174 | bool ParseAsmOperandsOpt(SmallVectorImpl<IdentifierInfo *> &Names, |
| 2175 | SmallVectorImpl<Expr *> &Constraints, |
| 2176 | SmallVectorImpl<Expr *> &Exprs); |
| 2177 | |
| 2178 | //===--------------------------------------------------------------------===// |
| 2179 | // C++ 6: Statements and Blocks |
| 2180 | |
| 2181 | StmtResult ParseCXXTryBlock(); |
| 2182 | StmtResult ParseCXXTryBlockCommon(SourceLocation TryLoc, bool FnTry = false); |
| 2183 | StmtResult ParseCXXCatchBlock(bool FnCatch = false); |
| 2184 | |
| 2185 | //===--------------------------------------------------------------------===// |
| 2186 | // MS: SEH Statements and Blocks |
| 2187 | |
| 2188 | StmtResult ParseSEHTryBlock(); |
| 2189 | StmtResult ParseSEHExceptBlock(SourceLocation Loc); |
| 2190 | StmtResult ParseSEHFinallyBlock(SourceLocation Loc); |
| 2191 | StmtResult ParseSEHLeaveStatement(); |
| 2192 | |
| 2193 | //===--------------------------------------------------------------------===// |
| 2194 | // Objective-C Statements |
| 2195 | |
| 2196 | StmtResult ParseObjCAtStatement(SourceLocation atLoc, |
| 2197 | ParsedStmtContext StmtCtx); |
| 2198 | StmtResult ParseObjCTryStmt(SourceLocation atLoc); |
| 2199 | StmtResult ParseObjCThrowStmt(SourceLocation atLoc); |
| 2200 | StmtResult ParseObjCSynchronizedStmt(SourceLocation atLoc); |
| 2201 | StmtResult ParseObjCAutoreleasePoolStmt(SourceLocation atLoc); |
| 2202 | |
| 2203 | |
| 2204 | //===--------------------------------------------------------------------===// |
| 2205 | // C99 6.7: Declarations. |
| 2206 | |
| 2207 | /// A context for parsing declaration specifiers. TODO: flesh this |
| 2208 | /// out, there are other significant restrictions on specifiers than |
| 2209 | /// would be best implemented in the parser. |
| 2210 | enum class DeclSpecContext { |
| 2211 | DSC_normal, // normal context |
| 2212 | DSC_class, // class context, enables 'friend' |
| 2213 | DSC_type_specifier, // C++ type-specifier-seq or C specifier-qualifier-list |
| 2214 | DSC_trailing, // C++11 trailing-type-specifier in a trailing return type |
| 2215 | DSC_alias_declaration, // C++11 type-specifier-seq in an alias-declaration |
| 2216 | DSC_conv_operator, // C++ type-specifier-seq in an conversion operator |
| 2217 | DSC_top_level, // top-level/namespace declaration context |
| 2218 | DSC_template_param, // template parameter context |
| 2219 | DSC_template_arg, // template argument context |
| 2220 | DSC_template_type_arg, // template type argument context |
| 2221 | DSC_objc_method_result, // ObjC method result context, enables |
| 2222 | // 'instancetype' |
| 2223 | DSC_condition, // condition declaration context |
| 2224 | DSC_association, // A _Generic selection expression's type association |
| 2225 | DSC_new, // C++ new expression |
| 2226 | }; |
| 2227 | |
| 2228 | /// Is this a context in which we are parsing just a type-specifier (or |
| 2229 | /// trailing-type-specifier)? |
| 2230 | static bool isTypeSpecifier(DeclSpecContext DSC) { |
| 2231 | switch (DSC) { |
| 2232 | case DeclSpecContext::DSC_normal: |
| 2233 | case DeclSpecContext::DSC_template_param: |
| 2234 | case DeclSpecContext::DSC_template_arg: |
| 2235 | case DeclSpecContext::DSC_class: |
| 2236 | case DeclSpecContext::DSC_top_level: |
| 2237 | case DeclSpecContext::DSC_objc_method_result: |
| 2238 | case DeclSpecContext::DSC_condition: |
| 2239 | return false; |
| 2240 | |
| 2241 | case DeclSpecContext::DSC_template_type_arg: |
| 2242 | case DeclSpecContext::DSC_type_specifier: |
| 2243 | case DeclSpecContext::DSC_conv_operator: |
| 2244 | case DeclSpecContext::DSC_trailing: |
| 2245 | case DeclSpecContext::DSC_alias_declaration: |
| 2246 | case DeclSpecContext::DSC_association: |
| 2247 | case DeclSpecContext::DSC_new: |
| 2248 | return true; |
| 2249 | } |
| 2250 | llvm_unreachable("Missing DeclSpecContext case"); |
| 2251 | } |
| 2252 | |
| 2253 | /// Whether a defining-type-specifier is permitted in a given context. |
| 2254 | enum class AllowDefiningTypeSpec { |
| 2255 | /// The grammar doesn't allow a defining-type-specifier here, and we must |
| 2256 | /// not parse one (eg, because a '{' could mean something else). |
| 2257 | No, |
| 2258 | /// The grammar doesn't allow a defining-type-specifier here, but we permit |
| 2259 | /// one for error recovery purposes. Sema will reject. |
| 2260 | NoButErrorRecovery, |
| 2261 | /// The grammar allows a defining-type-specifier here, even though it's |
| 2262 | /// always invalid. Sema will reject. |
| 2263 | YesButInvalid, |
| 2264 | /// The grammar allows a defining-type-specifier here, and one can be valid. |
| 2265 | Yes |
| 2266 | }; |
| 2267 | |
| 2268 | /// Is this a context in which we are parsing defining-type-specifiers (and |
| 2269 | /// so permit class and enum definitions in addition to non-defining class and |
| 2270 | /// enum elaborated-type-specifiers)? |
| 2271 | static AllowDefiningTypeSpec |
| 2272 | isDefiningTypeSpecifierContext(DeclSpecContext DSC, bool IsCPlusPlus) { |
| 2273 | switch (DSC) { |
| 2274 | case DeclSpecContext::DSC_normal: |
| 2275 | case DeclSpecContext::DSC_class: |
| 2276 | case DeclSpecContext::DSC_top_level: |
| 2277 | case DeclSpecContext::DSC_alias_declaration: |
| 2278 | case DeclSpecContext::DSC_objc_method_result: |
| 2279 | return AllowDefiningTypeSpec::Yes; |
| 2280 | |
| 2281 | case DeclSpecContext::DSC_condition: |
| 2282 | case DeclSpecContext::DSC_template_param: |
| 2283 | return AllowDefiningTypeSpec::YesButInvalid; |
| 2284 | |
| 2285 | case DeclSpecContext::DSC_template_type_arg: |
| 2286 | case DeclSpecContext::DSC_type_specifier: |
| 2287 | return AllowDefiningTypeSpec::NoButErrorRecovery; |
| 2288 | |
| 2289 | case DeclSpecContext::DSC_association: |
| 2290 | return IsCPlusPlus ? AllowDefiningTypeSpec::NoButErrorRecovery |
| 2291 | : AllowDefiningTypeSpec::Yes; |
| 2292 | |
| 2293 | case DeclSpecContext::DSC_trailing: |
| 2294 | case DeclSpecContext::DSC_conv_operator: |
| 2295 | case DeclSpecContext::DSC_template_arg: |
| 2296 | case DeclSpecContext::DSC_new: |
| 2297 | return AllowDefiningTypeSpec::No; |
| 2298 | } |
| 2299 | llvm_unreachable("Missing DeclSpecContext case"); |
| 2300 | } |
| 2301 | |
| 2302 | /// Is this a context in which an opaque-enum-declaration can appear? |
| 2303 | static bool isOpaqueEnumDeclarationContext(DeclSpecContext DSC) { |
| 2304 | switch (DSC) { |
| 2305 | case DeclSpecContext::DSC_normal: |
| 2306 | case DeclSpecContext::DSC_class: |
| 2307 | case DeclSpecContext::DSC_top_level: |
| 2308 | return true; |
| 2309 | |
| 2310 | case DeclSpecContext::DSC_alias_declaration: |
| 2311 | case DeclSpecContext::DSC_objc_method_result: |
| 2312 | case DeclSpecContext::DSC_condition: |
| 2313 | case DeclSpecContext::DSC_template_param: |
| 2314 | case DeclSpecContext::DSC_template_type_arg: |
| 2315 | case DeclSpecContext::DSC_type_specifier: |
| 2316 | case DeclSpecContext::DSC_trailing: |
| 2317 | case DeclSpecContext::DSC_association: |
| 2318 | case DeclSpecContext::DSC_conv_operator: |
| 2319 | case DeclSpecContext::DSC_template_arg: |
| 2320 | case DeclSpecContext::DSC_new: |
| 2321 | |
| 2322 | return false; |
| 2323 | } |
| 2324 | llvm_unreachable("Missing DeclSpecContext case"); |
| 2325 | } |
| 2326 | |
| 2327 | /// Is this a context in which we can perform class template argument |
| 2328 | /// deduction? |
| 2329 | static bool isClassTemplateDeductionContext(DeclSpecContext DSC) { |
| 2330 | switch (DSC) { |
| 2331 | case DeclSpecContext::DSC_normal: |
| 2332 | case DeclSpecContext::DSC_template_param: |
| 2333 | case DeclSpecContext::DSC_template_arg: |
| 2334 | case DeclSpecContext::DSC_class: |
| 2335 | case DeclSpecContext::DSC_top_level: |
| 2336 | case DeclSpecContext::DSC_condition: |
| 2337 | case DeclSpecContext::DSC_type_specifier: |
| 2338 | case DeclSpecContext::DSC_association: |
| 2339 | case DeclSpecContext::DSC_conv_operator: |
| 2340 | case DeclSpecContext::DSC_new: |
| 2341 | return true; |
| 2342 | |
| 2343 | case DeclSpecContext::DSC_objc_method_result: |
| 2344 | case DeclSpecContext::DSC_template_type_arg: |
| 2345 | case DeclSpecContext::DSC_trailing: |
| 2346 | case DeclSpecContext::DSC_alias_declaration: |
| 2347 | return false; |
| 2348 | } |
| 2349 | llvm_unreachable("Missing DeclSpecContext case"); |
| 2350 | } |
| 2351 | |
| 2352 | // Is this a context in which an implicit 'typename' is allowed? |
| 2353 | static ImplicitTypenameContext |
| 2354 | getImplicitTypenameContext(DeclSpecContext DSC) { |
| 2355 | switch (DSC) { |
| 2356 | case DeclSpecContext::DSC_class: |
| 2357 | case DeclSpecContext::DSC_top_level: |
| 2358 | case DeclSpecContext::DSC_type_specifier: |
| 2359 | case DeclSpecContext::DSC_template_type_arg: |
| 2360 | case DeclSpecContext::DSC_trailing: |
| 2361 | case DeclSpecContext::DSC_alias_declaration: |
| 2362 | case DeclSpecContext::DSC_template_param: |
| 2363 | case DeclSpecContext::DSC_new: |
| 2364 | return ImplicitTypenameContext::Yes; |
| 2365 | |
| 2366 | case DeclSpecContext::DSC_normal: |
| 2367 | case DeclSpecContext::DSC_objc_method_result: |
| 2368 | case DeclSpecContext::DSC_condition: |
| 2369 | case DeclSpecContext::DSC_template_arg: |
| 2370 | case DeclSpecContext::DSC_conv_operator: |
| 2371 | case DeclSpecContext::DSC_association: |
| 2372 | return ImplicitTypenameContext::No; |
| 2373 | } |
| 2374 | llvm_unreachable("Missing DeclSpecContext case"); |
| 2375 | } |
| 2376 | |
| 2377 | /// Information on a C++0x for-range-initializer found while parsing a |
| 2378 | /// declaration which turns out to be a for-range-declaration. |
| 2379 | struct ForRangeInit { |
| 2380 | SourceLocation ColonLoc; |
| 2381 | ExprResult RangeExpr; |
| 2382 | |
| 2383 | bool ParsedForRangeDecl() { return !ColonLoc.isInvalid(); } |
| 2384 | }; |
| 2385 | struct ForRangeInfo : ForRangeInit { |
| 2386 | StmtResult LoopVar; |
| 2387 | }; |
| 2388 | |
| 2389 | DeclGroupPtrTy ParseDeclaration(DeclaratorContext Context, |
| 2390 | SourceLocation &DeclEnd, |
| 2391 | ParsedAttributes &DeclAttrs, |
| 2392 | ParsedAttributes &DeclSpecAttrs, |
| 2393 | SourceLocation *DeclSpecStart = nullptr); |
| 2394 | DeclGroupPtrTy |
| 2395 | ParseSimpleDeclaration(DeclaratorContext Context, SourceLocation &DeclEnd, |
| 2396 | ParsedAttributes &DeclAttrs, |
| 2397 | ParsedAttributes &DeclSpecAttrs, bool RequireSemi, |
| 2398 | ForRangeInit *FRI = nullptr, |
| 2399 | SourceLocation *DeclSpecStart = nullptr); |
| 2400 | bool MightBeDeclarator(DeclaratorContext Context); |
| 2401 | DeclGroupPtrTy ParseDeclGroup(ParsingDeclSpec &DS, DeclaratorContext Context, |
| 2402 | ParsedAttributes &Attrs, |
| 2403 | SourceLocation *DeclEnd = nullptr, |
| 2404 | ForRangeInit *FRI = nullptr); |
| 2405 | Decl *ParseDeclarationAfterDeclarator(Declarator &D, |
| 2406 | const ParsedTemplateInfo &TemplateInfo = ParsedTemplateInfo()); |
| 2407 | bool ParseAsmAttributesAfterDeclarator(Declarator &D); |
| 2408 | Decl *ParseDeclarationAfterDeclaratorAndAttributes( |
| 2409 | Declarator &D, |
| 2410 | const ParsedTemplateInfo &TemplateInfo = ParsedTemplateInfo(), |
| 2411 | ForRangeInit *FRI = nullptr); |
| 2412 | Decl *ParseFunctionStatementBody(Decl *Decl, ParseScope &BodyScope); |
| 2413 | Decl *ParseFunctionTryBlock(Decl *Decl, ParseScope &BodyScope); |
| 2414 | |
| 2415 | /// When in code-completion, skip parsing of the function/method body |
| 2416 | /// unless the body contains the code-completion point. |
| 2417 | /// |
| 2418 | /// \returns true if the function body was skipped. |
| 2419 | bool trySkippingFunctionBody(); |
| 2420 | |
| 2421 | bool ParseImplicitInt(DeclSpec &DS, CXXScopeSpec *SS, |
| 2422 | const ParsedTemplateInfo &TemplateInfo, |
| 2423 | AccessSpecifier AS, DeclSpecContext DSC, |
| 2424 | ParsedAttributes &Attrs); |
| 2425 | DeclSpecContext |
| 2426 | getDeclSpecContextFromDeclaratorContext(DeclaratorContext Context); |
| 2427 | void ParseDeclarationSpecifiers( |
| 2428 | DeclSpec &DS, |
| 2429 | const ParsedTemplateInfo &TemplateInfo = ParsedTemplateInfo(), |
| 2430 | AccessSpecifier AS = AS_none, |
| 2431 | DeclSpecContext DSC = DeclSpecContext::DSC_normal, |
| 2432 | LateParsedAttrList *LateAttrs = nullptr) { |
| 2433 | return ParseDeclarationSpecifiers(DS, TemplateInfo, AS, DSC, LateAttrs, |
| 2434 | getImplicitTypenameContext(DSC)); |
| 2435 | } |
| 2436 | void ParseDeclarationSpecifiers( |
| 2437 | DeclSpec &DS, const ParsedTemplateInfo &TemplateInfo, AccessSpecifier AS, |
| 2438 | DeclSpecContext DSC, LateParsedAttrList *LateAttrs, |
| 2439 | ImplicitTypenameContext AllowImplicitTypename); |
| 2440 | |
| 2441 | bool DiagnoseMissingSemiAfterTagDefinition( |
| 2442 | DeclSpec &DS, AccessSpecifier AS, DeclSpecContext DSContext, |
| 2443 | LateParsedAttrList *LateAttrs = nullptr); |
| 2444 | |
| 2445 | void ParseSpecifierQualifierList( |
| 2446 | DeclSpec &DS, AccessSpecifier AS = AS_none, |
| 2447 | DeclSpecContext DSC = DeclSpecContext::DSC_normal) { |
| 2448 | ParseSpecifierQualifierList(DS, getImplicitTypenameContext(DSC), AS, DSC); |
| 2449 | } |
| 2450 | |
| 2451 | void ParseSpecifierQualifierList( |
| 2452 | DeclSpec &DS, ImplicitTypenameContext AllowImplicitTypename, |
| 2453 | AccessSpecifier AS = AS_none, |
| 2454 | DeclSpecContext DSC = DeclSpecContext::DSC_normal); |
| 2455 | |
| 2456 | void ParseObjCTypeQualifierList(ObjCDeclSpec &DS, |
| 2457 | DeclaratorContext Context); |
| 2458 | |
| 2459 | void ParseEnumSpecifier(SourceLocation TagLoc, DeclSpec &DS, |
| 2460 | const ParsedTemplateInfo &TemplateInfo, |
| 2461 | AccessSpecifier AS, DeclSpecContext DSC); |
| 2462 | void ParseEnumBody(SourceLocation StartLoc, Decl *TagDecl); |
| 2463 | void ParseStructUnionBody(SourceLocation StartLoc, DeclSpec::TST TagType, |
| 2464 | RecordDecl *TagDecl); |
| 2465 | |
| 2466 | void ParseStructDeclaration( |
| 2467 | ParsingDeclSpec &DS, |
| 2468 | llvm::function_ref<void(ParsingFieldDeclarator &)> FieldsCallback); |
| 2469 | |
| 2470 | DeclGroupPtrTy ParseTopLevelStmtDecl(); |
| 2471 | |
| 2472 | bool isDeclarationSpecifier(ImplicitTypenameContext AllowImplicitTypename, |
| 2473 | bool DisambiguatingWithExpression = false); |
| 2474 | bool isTypeSpecifierQualifier(); |
| 2475 | |
| 2476 | /// isKnownToBeTypeSpecifier - Return true if we know that the specified token |
| 2477 | /// is definitely a type-specifier. Return false if it isn't part of a type |
| 2478 | /// specifier or if we're not sure. |
| 2479 | bool isKnownToBeTypeSpecifier(const Token &Tok) const; |
| 2480 | |
| 2481 | /// Return true if we know that we are definitely looking at a |
| 2482 | /// decl-specifier, and isn't part of an expression such as a function-style |
| 2483 | /// cast. Return false if it's no a decl-specifier, or we're not sure. |
| 2484 | bool isKnownToBeDeclarationSpecifier() { |
| 2485 | if (getLangOpts().CPlusPlus) |
| 2486 | return isCXXDeclarationSpecifier(ImplicitTypenameContext::No) == |
| 2487 | TPResult::True; |
| 2488 | return isDeclarationSpecifier(ImplicitTypenameContext::No, true); |
| 2489 | } |
| 2490 | |
| 2491 | /// isDeclarationStatement - Disambiguates between a declaration or an |
| 2492 | /// expression statement, when parsing function bodies. |
| 2493 | /// |
| 2494 | /// \param DisambiguatingWithExpression - True to indicate that the purpose of |
| 2495 | /// this check is to disambiguate between an expression and a declaration. |
| 2496 | /// Returns true for declaration, false for expression. |
| 2497 | bool isDeclarationStatement(bool DisambiguatingWithExpression = false) { |
| 2498 | if (getLangOpts().CPlusPlus) |
| 2499 | return isCXXDeclarationStatement(DisambiguatingWithExpression); |
| 2500 | return isDeclarationSpecifier(ImplicitTypenameContext::No, true); |
| 2501 | } |
| 2502 | |
| 2503 | /// isForInitDeclaration - Disambiguates between a declaration or an |
| 2504 | /// expression in the context of the C 'clause-1' or the C++ |
| 2505 | // 'for-init-statement' part of a 'for' statement. |
| 2506 | /// Returns true for declaration, false for expression. |
| 2507 | bool isForInitDeclaration() { |
| 2508 | if (getLangOpts().OpenMP) |
| 2509 | Actions.startOpenMPLoop(); |
| 2510 | if (getLangOpts().CPlusPlus) |
| 2511 | return Tok.is(tok::kw_using) || |
| 2512 | isCXXSimpleDeclaration(/*AllowForRangeDecl=*/true); |
| 2513 | return isDeclarationSpecifier(ImplicitTypenameContext::No, true); |
| 2514 | } |
| 2515 | |
| 2516 | /// Determine whether this is a C++1z for-range-identifier. |
| 2517 | bool isForRangeIdentifier(); |
| 2518 | |
| 2519 | /// Determine whether we are currently at the start of an Objective-C |
| 2520 | /// class message that appears to be missing the open bracket '['. |
| 2521 | bool isStartOfObjCClassMessageMissingOpenBracket(); |
| 2522 | |
| 2523 | /// Starting with a scope specifier, identifier, or |
| 2524 | /// template-id that refers to the current class, determine whether |
| 2525 | /// this is a constructor declarator. |
| 2526 | bool isConstructorDeclarator( |
| 2527 | bool Unqualified, bool DeductionGuide = false, |
| 2528 | DeclSpec::FriendSpecified IsFriend = DeclSpec::FriendSpecified::No, |
| 2529 | const ParsedTemplateInfo *TemplateInfo = nullptr); |
| 2530 | |
| 2531 | /// Specifies the context in which type-id/expression |
| 2532 | /// disambiguation will occur. |
| 2533 | enum TentativeCXXTypeIdContext { |
| 2534 | TypeIdInParens, |
| 2535 | TypeIdUnambiguous, |
| 2536 | TypeIdAsTemplateArgument, |
| 2537 | TypeIdInTrailingReturnType, |
| 2538 | TypeIdAsGenericSelectionArgument, |
| 2539 | }; |
| 2540 | |
| 2541 | /// isTypeIdInParens - Assumes that a '(' was parsed and now we want to know |
| 2542 | /// whether the parens contain an expression or a type-id. |
| 2543 | /// Returns true for a type-id and false for an expression. |
| 2544 | bool isTypeIdInParens(bool &isAmbiguous) { |
| 2545 | if (getLangOpts().CPlusPlus) |
| 2546 | return isCXXTypeId(TypeIdInParens, isAmbiguous); |
| 2547 | isAmbiguous = false; |
| 2548 | return isTypeSpecifierQualifier(); |
| 2549 | } |
| 2550 | bool isTypeIdInParens() { |
| 2551 | bool isAmbiguous; |
| 2552 | return isTypeIdInParens(isAmbiguous); |
| 2553 | } |
| 2554 | |
| 2555 | /// Checks whether the current tokens form a type-id or an expression for the |
| 2556 | /// purposes of use as the initial operand to a generic selection expression. |
| 2557 | /// This requires special handling in C++ because it accepts either a type or |
| 2558 | /// an expression, and we need to disambiguate which is which. However, we |
| 2559 | /// cannot use the same logic as we've used for sizeof expressions, because |
| 2560 | /// that logic relies on the operator only accepting a single argument, |
| 2561 | /// whereas _Generic accepts a list of arguments. |
| 2562 | bool isTypeIdForGenericSelection() { |
| 2563 | if (getLangOpts().CPlusPlus) { |
| 2564 | bool isAmbiguous; |
| 2565 | return isCXXTypeId(TypeIdAsGenericSelectionArgument, isAmbiguous); |
| 2566 | } |
| 2567 | return isTypeSpecifierQualifier(); |
| 2568 | } |
| 2569 | |
| 2570 | /// Checks if the current tokens form type-id or expression. |
| 2571 | /// It is similar to isTypeIdInParens but does not suppose that type-id |
| 2572 | /// is in parenthesis. |
| 2573 | bool isTypeIdUnambiguously() { |
| 2574 | if (getLangOpts().CPlusPlus) { |
| 2575 | bool isAmbiguous; |
| 2576 | return isCXXTypeId(TypeIdUnambiguous, isAmbiguous); |
| 2577 | } |
| 2578 | return isTypeSpecifierQualifier(); |
| 2579 | } |
| 2580 | |
| 2581 | /// isCXXDeclarationStatement - C++-specialized function that disambiguates |
| 2582 | /// between a declaration or an expression statement, when parsing function |
| 2583 | /// bodies. Returns true for declaration, false for expression. |
| 2584 | bool isCXXDeclarationStatement(bool DisambiguatingWithExpression = false); |
| 2585 | |
| 2586 | /// isCXXSimpleDeclaration - C++-specialized function that disambiguates |
| 2587 | /// between a simple-declaration or an expression-statement. |
| 2588 | /// If during the disambiguation process a parsing error is encountered, |
| 2589 | /// the function returns true to let the declaration parsing code handle it. |
| 2590 | /// Returns false if the statement is disambiguated as expression. |
| 2591 | bool isCXXSimpleDeclaration(bool AllowForRangeDecl); |
| 2592 | |
| 2593 | /// isCXXFunctionDeclarator - Disambiguates between a function declarator or |
| 2594 | /// a constructor-style initializer, when parsing declaration statements. |
| 2595 | /// Returns true for function declarator and false for constructor-style |
| 2596 | /// initializer. Sets 'IsAmbiguous' to true to indicate that this declaration |
| 2597 | /// might be a constructor-style initializer. |
| 2598 | /// If during the disambiguation process a parsing error is encountered, |
| 2599 | /// the function returns true to let the declaration parsing code handle it. |
| 2600 | bool isCXXFunctionDeclarator(bool *IsAmbiguous = nullptr, |
| 2601 | ImplicitTypenameContext AllowImplicitTypename = |
| 2602 | ImplicitTypenameContext::No); |
| 2603 | |
| 2604 | struct ConditionDeclarationOrInitStatementState; |
| 2605 | enum class ConditionOrInitStatement { |
| 2606 | Expression, ///< Disambiguated as an expression (either kind). |
| 2607 | ConditionDecl, ///< Disambiguated as the declaration form of condition. |
| 2608 | InitStmtDecl, ///< Disambiguated as a simple-declaration init-statement. |
| 2609 | ForRangeDecl, ///< Disambiguated as a for-range declaration. |
| 2610 | Error ///< Can't be any of the above! |
| 2611 | }; |
| 2612 | /// Disambiguates between the different kinds of things that can happen |
| 2613 | /// after 'if (' or 'switch ('. This could be one of two different kinds of |
| 2614 | /// declaration (depending on whether there is a ';' later) or an expression. |
| 2615 | ConditionOrInitStatement |
| 2616 | isCXXConditionDeclarationOrInitStatement(bool CanBeInitStmt, |
| 2617 | bool CanBeForRangeDecl); |
| 2618 | |
| 2619 | bool isCXXTypeId(TentativeCXXTypeIdContext Context, bool &isAmbiguous); |
| 2620 | bool isCXXTypeId(TentativeCXXTypeIdContext Context) { |
| 2621 | bool isAmbiguous; |
| 2622 | return isCXXTypeId(Context, isAmbiguous); |
| 2623 | } |
| 2624 | |
| 2625 | /// TPResult - Used as the result value for functions whose purpose is to |
| 2626 | /// disambiguate C++ constructs by "tentatively parsing" them. |
| 2627 | enum class TPResult { |
| 2628 | True, False, Ambiguous, Error |
| 2629 | }; |
| 2630 | |
| 2631 | /// Determine whether we could have an enum-base. |
| 2632 | /// |
| 2633 | /// \p AllowSemi If \c true, then allow a ';' after the enum-base; otherwise |
| 2634 | /// only consider this to be an enum-base if the next token is a '{'. |
| 2635 | /// |
| 2636 | /// \return \c false if this cannot possibly be an enum base; \c true |
| 2637 | /// otherwise. |
| 2638 | bool isEnumBase(bool AllowSemi); |
| 2639 | |
| 2640 | /// isCXXDeclarationSpecifier - Returns TPResult::True if it is a |
| 2641 | /// declaration specifier, TPResult::False if it is not, |
| 2642 | /// TPResult::Ambiguous if it could be either a decl-specifier or a |
| 2643 | /// function-style cast, and TPResult::Error if a parsing error was |
| 2644 | /// encountered. If it could be a braced C++11 function-style cast, returns |
| 2645 | /// BracedCastResult. |
| 2646 | /// Doesn't consume tokens. |
| 2647 | TPResult |
| 2648 | isCXXDeclarationSpecifier(ImplicitTypenameContext AllowImplicitTypename, |
| 2649 | TPResult BracedCastResult = TPResult::False, |
| 2650 | bool *InvalidAsDeclSpec = nullptr); |
| 2651 | |
| 2652 | /// Given that isCXXDeclarationSpecifier returns \c TPResult::True or |
| 2653 | /// \c TPResult::Ambiguous, determine whether the decl-specifier would be |
| 2654 | /// a type-specifier other than a cv-qualifier. |
| 2655 | bool isCXXDeclarationSpecifierAType(); |
| 2656 | |
| 2657 | /// Determine whether the current token sequence might be |
| 2658 | /// '<' template-argument-list '>' |
| 2659 | /// rather than a less-than expression. |
| 2660 | TPResult isTemplateArgumentList(unsigned TokensToSkip); |
| 2661 | |
| 2662 | /// Determine whether an '(' after an 'explicit' keyword is part of a C++20 |
| 2663 | /// 'explicit(bool)' declaration, in earlier language modes where that is an |
| 2664 | /// extension. |
| 2665 | TPResult isExplicitBool(); |
| 2666 | |
| 2667 | /// Determine whether an identifier has been tentatively declared as a |
| 2668 | /// non-type. Such tentative declarations should not be found to name a type |
| 2669 | /// during a tentative parse, but also should not be annotated as a non-type. |
| 2670 | bool isTentativelyDeclared(IdentifierInfo *II); |
| 2671 | |
| 2672 | // "Tentative parsing" functions, used for disambiguation. If a parsing error |
| 2673 | // is encountered they will return TPResult::Error. |
| 2674 | // Returning TPResult::True/False indicates that the ambiguity was |
| 2675 | // resolved and tentative parsing may stop. TPResult::Ambiguous indicates |
| 2676 | // that more tentative parsing is necessary for disambiguation. |
| 2677 | // They all consume tokens, so backtracking should be used after calling them. |
| 2678 | |
| 2679 | TPResult TryParseSimpleDeclaration(bool AllowForRangeDecl); |
| 2680 | TPResult TryParseTypeofSpecifier(); |
| 2681 | TPResult TryParseProtocolQualifiers(); |
| 2682 | TPResult TryParsePtrOperatorSeq(); |
| 2683 | TPResult TryParseOperatorId(); |
| 2684 | TPResult TryParseInitDeclaratorList(bool MayHaveTrailingReturnType = false); |
| 2685 | TPResult TryParseDeclarator(bool mayBeAbstract, bool mayHaveIdentifier = true, |
| 2686 | bool mayHaveDirectInit = false, |
| 2687 | bool mayHaveTrailingReturnType = false); |
| 2688 | TPResult TryParseParameterDeclarationClause( |
| 2689 | bool *InvalidAsDeclaration = nullptr, bool VersusTemplateArg = false, |
| 2690 | ImplicitTypenameContext AllowImplicitTypename = |
| 2691 | ImplicitTypenameContext::No); |
| 2692 | TPResult TryParseFunctionDeclarator(bool MayHaveTrailingReturnType = false); |
| 2693 | bool NameAfterArrowIsNonType(); |
| 2694 | TPResult TryParseBracketDeclarator(); |
| 2695 | TPResult TryConsumeDeclarationSpecifier(); |
| 2696 | |
| 2697 | /// Try to skip a possibly empty sequence of 'attribute-specifier's without |
| 2698 | /// full validation of the syntactic structure of attributes. |
| 2699 | bool TrySkipAttributes(); |
| 2700 | |
| 2701 | /// Diagnoses use of _ExtInt as being deprecated, and diagnoses use of |
| 2702 | /// _BitInt as an extension when appropriate. |
| 2703 | void DiagnoseBitIntUse(const Token &Tok); |
| 2704 | |
| 2705 | public: |
| 2706 | TypeResult |
| 2707 | ParseTypeName(SourceRange *Range = nullptr, |
| 2708 | DeclaratorContext Context = DeclaratorContext::TypeName, |
| 2709 | AccessSpecifier AS = AS_none, Decl **OwnedType = nullptr, |
| 2710 | ParsedAttributes *Attrs = nullptr); |
| 2711 | |
| 2712 | private: |
| 2713 | void ParseBlockId(SourceLocation CaretLoc); |
| 2714 | |
| 2715 | /// Return true if the next token should be treated as a [[]] attribute, |
| 2716 | /// or as a keyword that behaves like one. The former is only true if |
| 2717 | /// [[]] attributes are enabled, whereas the latter is true whenever |
| 2718 | /// such a keyword appears. The arguments are as for |
| 2719 | /// isCXX11AttributeSpecifier. |
| 2720 | bool isAllowedCXX11AttributeSpecifier(bool Disambiguate = false, |
| 2721 | bool OuterMightBeMessageSend = false) { |
| 2722 | return (Tok.isRegularKeywordAttribute() || |
| 2723 | isCXX11AttributeSpecifier(Disambiguate, OuterMightBeMessageSend)); |
| 2724 | } |
| 2725 | |
| 2726 | // Check for the start of an attribute-specifier-seq in a context where an |
| 2727 | // attribute is not allowed. |
| 2728 | bool CheckProhibitedCXX11Attribute() { |
| 2729 | assert(Tok.is(tok::l_square)); |
| 2730 | if (NextToken().isNot(tok::l_square)) |
| 2731 | return false; |
| 2732 | return DiagnoseProhibitedCXX11Attribute(); |
| 2733 | } |
| 2734 | |
| 2735 | bool DiagnoseProhibitedCXX11Attribute(); |
| 2736 | void CheckMisplacedCXX11Attribute(ParsedAttributes &Attrs, |
| 2737 | SourceLocation CorrectLocation) { |
| 2738 | if (!Tok.isRegularKeywordAttribute() && |
| 2739 | (Tok.isNot(tok::l_square) || NextToken().isNot(tok::l_square)) && |
| 2740 | Tok.isNot(tok::kw_alignas)) |
| 2741 | return; |
| 2742 | DiagnoseMisplacedCXX11Attribute(Attrs, CorrectLocation); |
| 2743 | } |
| 2744 | void DiagnoseMisplacedCXX11Attribute(ParsedAttributes &Attrs, |
| 2745 | SourceLocation CorrectLocation); |
| 2746 | |
| 2747 | void stripTypeAttributesOffDeclSpec(ParsedAttributes &Attrs, DeclSpec &DS, |
| 2748 | Sema::TagUseKind TUK); |
| 2749 | |
| 2750 | // FixItLoc = possible correct location for the attributes |
| 2751 | void ProhibitAttributes(ParsedAttributes &Attrs, |
| 2752 | SourceLocation FixItLoc = SourceLocation()) { |
| 2753 | if (Attrs.Range.isInvalid()) |
| 2754 | return; |
| 2755 | DiagnoseProhibitedAttributes(Attrs, FixItLoc); |
| 2756 | Attrs.clear(); |
| 2757 | } |
| 2758 | |
| 2759 | void ProhibitAttributes(ParsedAttributesView &Attrs, |
| 2760 | SourceLocation FixItLoc = SourceLocation()) { |
| 2761 | if (Attrs.Range.isInvalid()) |
| 2762 | return; |
| 2763 | DiagnoseProhibitedAttributes(Attrs, FixItLoc); |
| 2764 | Attrs.clearListOnly(); |
| 2765 | } |
| 2766 | void DiagnoseProhibitedAttributes(const ParsedAttributesView &Attrs, |
| 2767 | SourceLocation FixItLoc); |
| 2768 | |
| 2769 | // Forbid C++11 and C23 attributes that appear on certain syntactic locations |
| 2770 | // which standard permits but we don't supported yet, for example, attributes |
| 2771 | // appertain to decl specifiers. |
| 2772 | // For the most cases we don't want to warn on unknown type attributes, but |
| 2773 | // left them to later diagnoses. However, for a few cases like module |
| 2774 | // declarations and module import declarations, we should do it. |
| 2775 | void ProhibitCXX11Attributes(ParsedAttributes &Attrs, unsigned AttrDiagID, |
| 2776 | unsigned KeywordDiagId, |
| 2777 | bool DiagnoseEmptyAttrs = false, |
| 2778 | bool WarnOnUnknownAttrs = false); |
| 2779 | |
| 2780 | /// Skip C++11 and C23 attributes and return the end location of the |
| 2781 | /// last one. |
| 2782 | /// \returns SourceLocation() if there are no attributes. |
| 2783 | SourceLocation SkipCXX11Attributes(); |
| 2784 | |
| 2785 | /// Diagnose and skip C++11 and C23 attributes that appear in syntactic |
| 2786 | /// locations where attributes are not allowed. |
| 2787 | void DiagnoseAndSkipCXX11Attributes(); |
| 2788 | |
| 2789 | /// Emit warnings for C++11 and C23 attributes that are in a position that |
| 2790 | /// clang accepts as an extension. |
| 2791 | void DiagnoseCXX11AttributeExtension(ParsedAttributes &Attrs); |
| 2792 | |
| 2793 | ExprResult ParseUnevaluatedStringInAttribute(const IdentifierInfo &AttrName); |
| 2794 | |
| 2795 | bool |
| 2796 | ParseAttributeArgumentList(const clang::IdentifierInfo &AttrName, |
| 2797 | SmallVectorImpl<Expr *> &Exprs, |
| 2798 | ParsedAttributeArgumentsProperties ArgsProperties); |
| 2799 | |
| 2800 | /// Parses syntax-generic attribute arguments for attributes which are |
| 2801 | /// known to the implementation, and adds them to the given ParsedAttributes |
| 2802 | /// list with the given attribute syntax. Returns the number of arguments |
| 2803 | /// parsed for the attribute. |
| 2804 | unsigned |
| 2805 | ParseAttributeArgsCommon(IdentifierInfo *AttrName, SourceLocation AttrNameLoc, |
| 2806 | ParsedAttributes &Attrs, SourceLocation *EndLoc, |
| 2807 | IdentifierInfo *ScopeName, SourceLocation ScopeLoc, |
| 2808 | ParsedAttr::Form Form); |
| 2809 | |
| 2810 | enum ParseAttrKindMask { |
| 2811 | PAKM_GNU = 1 << 0, |
| 2812 | PAKM_Declspec = 1 << 1, |
| 2813 | PAKM_CXX11 = 1 << 2, |
| 2814 | }; |
| 2815 | |
| 2816 | /// \brief Parse attributes based on what syntaxes are desired, allowing for |
| 2817 | /// the order to vary. e.g. with PAKM_GNU | PAKM_Declspec: |
| 2818 | /// __attribute__((...)) __declspec(...) __attribute__((...))) |
| 2819 | /// Note that Microsoft attributes (spelled with single square brackets) are |
| 2820 | /// not supported by this because of parsing ambiguities with other |
| 2821 | /// constructs. |
| 2822 | /// |
| 2823 | /// There are some attribute parse orderings that should not be allowed in |
| 2824 | /// arbitrary order. e.g., |
| 2825 | /// |
| 2826 | /// [[]] __attribute__(()) int i; // OK |
| 2827 | /// __attribute__(()) [[]] int i; // Not OK |
| 2828 | /// |
| 2829 | /// Such situations should use the specific attribute parsing functionality. |
| 2830 | void ParseAttributes(unsigned WhichAttrKinds, ParsedAttributes &Attrs, |
| 2831 | LateParsedAttrList *LateAttrs = nullptr); |
| 2832 | /// \brief Possibly parse attributes based on what syntaxes are desired, |
| 2833 | /// allowing for the order to vary. |
| 2834 | bool MaybeParseAttributes(unsigned WhichAttrKinds, ParsedAttributes &Attrs, |
| 2835 | LateParsedAttrList *LateAttrs = nullptr) { |
| 2836 | if (Tok.isOneOf(tok::kw___attribute, tok::kw___declspec) || |
| 2837 | isAllowedCXX11AttributeSpecifier()) { |
| 2838 | ParseAttributes(WhichAttrKinds, Attrs, LateAttrs); |
| 2839 | return true; |
| 2840 | } |
| 2841 | return false; |
| 2842 | } |
| 2843 | |
| 2844 | void MaybeParseGNUAttributes(Declarator &D, |
| 2845 | LateParsedAttrList *LateAttrs = nullptr) { |
| 2846 | if (Tok.is(tok::kw___attribute)) { |
| 2847 | ParsedAttributes Attrs(AttrFactory); |
| 2848 | ParseGNUAttributes(Attrs, LateAttrs, &D); |
| 2849 | D.takeAttributes(Attrs); |
| 2850 | } |
| 2851 | } |
| 2852 | |
| 2853 | bool MaybeParseGNUAttributes(ParsedAttributes &Attrs, |
| 2854 | LateParsedAttrList *LateAttrs = nullptr) { |
| 2855 | if (Tok.is(tok::kw___attribute)) { |
| 2856 | ParseGNUAttributes(Attrs, LateAttrs); |
| 2857 | return true; |
| 2858 | } |
| 2859 | return false; |
| 2860 | } |
| 2861 | |
| 2862 | void ParseGNUAttributes(ParsedAttributes &Attrs, |
| 2863 | LateParsedAttrList *LateAttrs = nullptr, |
| 2864 | Declarator *D = nullptr); |
| 2865 | void ParseGNUAttributeArgs(IdentifierInfo *AttrName, |
| 2866 | SourceLocation AttrNameLoc, |
| 2867 | ParsedAttributes &Attrs, SourceLocation *EndLoc, |
| 2868 | IdentifierInfo *ScopeName, SourceLocation ScopeLoc, |
| 2869 | ParsedAttr::Form Form, Declarator *D); |
| 2870 | IdentifierLoc *ParseIdentifierLoc(); |
| 2871 | |
| 2872 | unsigned |
| 2873 | ParseClangAttributeArgs(IdentifierInfo *AttrName, SourceLocation AttrNameLoc, |
| 2874 | ParsedAttributes &Attrs, SourceLocation *EndLoc, |
| 2875 | IdentifierInfo *ScopeName, SourceLocation ScopeLoc, |
| 2876 | ParsedAttr::Form Form); |
| 2877 | |
| 2878 | void ReplayOpenMPAttributeTokens(CachedTokens &OpenMPTokens) { |
| 2879 | // If parsing the attributes found an OpenMP directive, emit those tokens |
| 2880 | // to the parse stream now. |
| 2881 | if (!OpenMPTokens.empty()) { |
| 2882 | PP.EnterToken(Tok, /*IsReinject*/ true); |
| 2883 | PP.EnterTokenStream(OpenMPTokens, /*DisableMacroExpansion*/ true, |
| 2884 | /*IsReinject*/ true); |
| 2885 | ConsumeAnyToken(/*ConsumeCodeCompletionTok*/ true); |
| 2886 | } |
| 2887 | } |
| 2888 | void MaybeParseCXX11Attributes(Declarator &D) { |
| 2889 | if (isAllowedCXX11AttributeSpecifier()) { |
| 2890 | ParsedAttributes Attrs(AttrFactory); |
| 2891 | ParseCXX11Attributes(Attrs); |
| 2892 | D.takeAttributes(Attrs); |
| 2893 | } |
| 2894 | } |
| 2895 | |
| 2896 | bool MaybeParseCXX11Attributes(ParsedAttributes &Attrs, |
| 2897 | bool OuterMightBeMessageSend = false) { |
| 2898 | if (isAllowedCXX11AttributeSpecifier(false, OuterMightBeMessageSend)) { |
| 2899 | ParseCXX11Attributes(Attrs); |
| 2900 | return true; |
| 2901 | } |
| 2902 | return false; |
| 2903 | } |
| 2904 | |
| 2905 | void ParseOpenMPAttributeArgs(IdentifierInfo *AttrName, |
| 2906 | CachedTokens &OpenMPTokens); |
| 2907 | |
| 2908 | void ParseCXX11AttributeSpecifierInternal(ParsedAttributes &Attrs, |
| 2909 | CachedTokens &OpenMPTokens, |
| 2910 | SourceLocation *EndLoc = nullptr); |
| 2911 | void ParseCXX11AttributeSpecifier(ParsedAttributes &Attrs, |
| 2912 | SourceLocation *EndLoc = nullptr) { |
| 2913 | CachedTokens OpenMPTokens; |
| 2914 | ParseCXX11AttributeSpecifierInternal(Attrs, OpenMPTokens, EndLoc); |
| 2915 | ReplayOpenMPAttributeTokens(OpenMPTokens); |
| 2916 | } |
| 2917 | void ParseCXX11Attributes(ParsedAttributes &attrs); |
| 2918 | /// Parses a C++11 (or C23)-style attribute argument list. Returns true |
| 2919 | /// if this results in adding an attribute to the ParsedAttributes list. |
| 2920 | bool ParseCXX11AttributeArgs(IdentifierInfo *AttrName, |
| 2921 | SourceLocation AttrNameLoc, |
| 2922 | ParsedAttributes &Attrs, SourceLocation *EndLoc, |
| 2923 | IdentifierInfo *ScopeName, |
| 2924 | SourceLocation ScopeLoc, |
| 2925 | CachedTokens &OpenMPTokens); |
| 2926 | |
| 2927 | IdentifierInfo *TryParseCXX11AttributeIdentifier( |
| 2928 | SourceLocation &Loc, |
| 2929 | Sema::AttributeCompletion Completion = Sema::AttributeCompletion::None, |
| 2930 | const IdentifierInfo *EnclosingScope = nullptr); |
| 2931 | |
| 2932 | void MaybeParseHLSLSemantics(Declarator &D, |
| 2933 | SourceLocation *EndLoc = nullptr) { |
| 2934 | assert(getLangOpts().HLSL && "MaybeParseHLSLSemantics is for HLSL only"); |
| 2935 | if (Tok.is(tok::colon)) { |
| 2936 | ParsedAttributes Attrs(AttrFactory); |
| 2937 | ParseHLSLSemantics(Attrs, EndLoc); |
| 2938 | D.takeAttributes(Attrs); |
| 2939 | } |
| 2940 | } |
| 2941 | |
| 2942 | void MaybeParseHLSLSemantics(ParsedAttributes &Attrs, |
| 2943 | SourceLocation *EndLoc = nullptr) { |
| 2944 | assert(getLangOpts().HLSL && "MaybeParseHLSLSemantics is for HLSL only"); |
| 2945 | if (getLangOpts().HLSL && Tok.is(tok::colon)) |
| 2946 | ParseHLSLSemantics(Attrs, EndLoc); |
| 2947 | } |
| 2948 | |
| 2949 | void ParseHLSLSemantics(ParsedAttributes &Attrs, |
| 2950 | SourceLocation *EndLoc = nullptr); |
| 2951 | Decl *ParseHLSLBuffer(SourceLocation &DeclEnd); |
| 2952 | |
| 2953 | void MaybeParseMicrosoftAttributes(ParsedAttributes &Attrs) { |
| 2954 | if ((getLangOpts().MicrosoftExt || getLangOpts().HLSL) && |
| 2955 | Tok.is(tok::l_square)) { |
| 2956 | ParsedAttributes AttrsWithRange(AttrFactory); |
| 2957 | ParseMicrosoftAttributes(AttrsWithRange); |
| 2958 | Attrs.takeAllFrom(AttrsWithRange); |
| 2959 | } |
| 2960 | } |
| 2961 | void ParseMicrosoftUuidAttributeArgs(ParsedAttributes &Attrs); |
| 2962 | void ParseMicrosoftAttributes(ParsedAttributes &Attrs); |
| 2963 | bool MaybeParseMicrosoftDeclSpecs(ParsedAttributes &Attrs) { |
| 2964 | if (getLangOpts().DeclSpecKeyword && Tok.is(tok::kw___declspec)) { |
| 2965 | ParseMicrosoftDeclSpecs(Attrs); |
| 2966 | return true; |
| 2967 | } |
| 2968 | return false; |
| 2969 | } |
| 2970 | void ParseMicrosoftDeclSpecs(ParsedAttributes &Attrs); |
| 2971 | bool ParseMicrosoftDeclSpecArgs(IdentifierInfo *AttrName, |
| 2972 | SourceLocation AttrNameLoc, |
| 2973 | ParsedAttributes &Attrs); |
| 2974 | void ParseMicrosoftTypeAttributes(ParsedAttributes &attrs); |
| 2975 | void ParseWebAssemblyFuncrefTypeAttribute(ParsedAttributes &Attrs); |
| 2976 | void DiagnoseAndSkipExtendedMicrosoftTypeAttributes(); |
| 2977 | SourceLocation SkipExtendedMicrosoftTypeAttributes(); |
| 2978 | void ParseMicrosoftInheritanceClassAttributes(ParsedAttributes &attrs); |
| 2979 | void ParseBorlandTypeAttributes(ParsedAttributes &attrs); |
| 2980 | void ParseOpenCLKernelAttributes(ParsedAttributes &attrs); |
| 2981 | void ParseOpenCLQualifiers(ParsedAttributes &Attrs); |
| 2982 | void ParseNullabilityTypeSpecifiers(ParsedAttributes &attrs); |
| 2983 | void ParseCUDAFunctionAttributes(ParsedAttributes &attrs); |
| 2984 | bool isHLSLQualifier(const Token &Tok) const; |
| 2985 | void ParseHLSLQualifiers(ParsedAttributes &Attrs); |
| 2986 | |
| 2987 | VersionTuple ParseVersionTuple(SourceRange &Range); |
| 2988 | void ParseAvailabilityAttribute(IdentifierInfo &Availability, |
| 2989 | SourceLocation AvailabilityLoc, |
| 2990 | ParsedAttributes &attrs, |
| 2991 | SourceLocation *endLoc, |
| 2992 | IdentifierInfo *ScopeName, |
| 2993 | SourceLocation ScopeLoc, |
| 2994 | ParsedAttr::Form Form); |
| 2995 | |
| 2996 | std::optional<AvailabilitySpec> ParseAvailabilitySpec(); |
| 2997 | ExprResult ParseAvailabilityCheckExpr(SourceLocation StartLoc); |
| 2998 | |
| 2999 | void ParseExternalSourceSymbolAttribute(IdentifierInfo &ExternalSourceSymbol, |
| 3000 | SourceLocation Loc, |
| 3001 | ParsedAttributes &Attrs, |
| 3002 | SourceLocation *EndLoc, |
| 3003 | IdentifierInfo *ScopeName, |
| 3004 | SourceLocation ScopeLoc, |
| 3005 | ParsedAttr::Form Form); |
| 3006 | |
| 3007 | void ParseObjCBridgeRelatedAttribute(IdentifierInfo &ObjCBridgeRelated, |
| 3008 | SourceLocation ObjCBridgeRelatedLoc, |
| 3009 | ParsedAttributes &Attrs, |
| 3010 | SourceLocation *EndLoc, |
| 3011 | IdentifierInfo *ScopeName, |
| 3012 | SourceLocation ScopeLoc, |
| 3013 | ParsedAttr::Form Form); |
| 3014 | |
| 3015 | void ParseSwiftNewTypeAttribute(IdentifierInfo &AttrName, |
| 3016 | SourceLocation AttrNameLoc, |
| 3017 | ParsedAttributes &Attrs, |
| 3018 | SourceLocation *EndLoc, |
| 3019 | IdentifierInfo *ScopeName, |
| 3020 | SourceLocation ScopeLoc, |
| 3021 | ParsedAttr::Form Form); |
| 3022 | |
| 3023 | void ParseTypeTagForDatatypeAttribute(IdentifierInfo &AttrName, |
| 3024 | SourceLocation AttrNameLoc, |
| 3025 | ParsedAttributes &Attrs, |
| 3026 | SourceLocation *EndLoc, |
| 3027 | IdentifierInfo *ScopeName, |
| 3028 | SourceLocation ScopeLoc, |
| 3029 | ParsedAttr::Form Form); |
| 3030 | |
| 3031 | void ParseAttributeWithTypeArg(IdentifierInfo &AttrName, |
| 3032 | SourceLocation AttrNameLoc, |
| 3033 | ParsedAttributes &Attrs, |
| 3034 | IdentifierInfo *ScopeName, |
| 3035 | SourceLocation ScopeLoc, |
| 3036 | ParsedAttr::Form Form); |
| 3037 | |
| 3038 | void ParseTypeofSpecifier(DeclSpec &DS); |
| 3039 | SourceLocation ParseDecltypeSpecifier(DeclSpec &DS); |
| 3040 | void AnnotateExistingDecltypeSpecifier(const DeclSpec &DS, |
| 3041 | SourceLocation StartLoc, |
| 3042 | SourceLocation EndLoc); |
| 3043 | void ParseAtomicSpecifier(DeclSpec &DS); |
| 3044 | |
| 3045 | ExprResult ParseAlignArgument(StringRef KWName, SourceLocation Start, |
| 3046 | SourceLocation &EllipsisLoc, bool &IsType, |
| 3047 | ParsedType &Ty); |
| 3048 | void ParseAlignmentSpecifier(ParsedAttributes &Attrs, |
| 3049 | SourceLocation *endLoc = nullptr); |
| 3050 | ExprResult ParseExtIntegerArgument(); |
| 3051 | |
| 3052 | VirtSpecifiers::Specifier isCXX11VirtSpecifier(const Token &Tok) const; |
| 3053 | VirtSpecifiers::Specifier isCXX11VirtSpecifier() const { |
| 3054 | return isCXX11VirtSpecifier(Tok); |
| 3055 | } |
| 3056 | void ParseOptionalCXX11VirtSpecifierSeq(VirtSpecifiers &VS, bool IsInterface, |
| 3057 | SourceLocation FriendLoc); |
| 3058 | |
| 3059 | bool isCXX11FinalKeyword() const; |
| 3060 | bool isClassCompatibleKeyword() const; |
| 3061 | |
| 3062 | /// DeclaratorScopeObj - RAII object used in Parser::ParseDirectDeclarator to |
| 3063 | /// enter a new C++ declarator scope and exit it when the function is |
| 3064 | /// finished. |
| 3065 | class DeclaratorScopeObj { |
| 3066 | Parser &P; |
| 3067 | CXXScopeSpec &SS; |
| 3068 | bool EnteredScope; |
| 3069 | bool CreatedScope; |
| 3070 | public: |
| 3071 | DeclaratorScopeObj(Parser &p, CXXScopeSpec &ss) |
| 3072 | : P(p), SS(ss), EnteredScope(false), CreatedScope(false) {} |
| 3073 | |
| 3074 | void EnterDeclaratorScope() { |
| 3075 | assert(!EnteredScope && "Already entered the scope!"); |
| 3076 | assert(SS.isSet() && "C++ scope was not set!"); |
| 3077 | |
| 3078 | CreatedScope = true; |
| 3079 | P.EnterScope(0); // Not a decl scope. |
| 3080 | |
| 3081 | if (!P.Actions.ActOnCXXEnterDeclaratorScope(P.getCurScope(), SS)) |
| 3082 | EnteredScope = true; |
| 3083 | } |
| 3084 | |
| 3085 | ~DeclaratorScopeObj() { |
| 3086 | if (EnteredScope) { |
| 3087 | assert(SS.isSet() && "C++ scope was cleared ?"); |
| 3088 | P.Actions.ActOnCXXExitDeclaratorScope(P.getCurScope(), SS); |
| 3089 | } |
| 3090 | if (CreatedScope) |
| 3091 | P.ExitScope(); |
| 3092 | } |
| 3093 | }; |
| 3094 | |
| 3095 | /// ParseDeclarator - Parse and verify a newly-initialized declarator. |
| 3096 | void ParseDeclarator(Declarator &D); |
| 3097 | /// A function that parses a variant of direct-declarator. |
| 3098 | typedef void (Parser::*DirectDeclParseFunction)(Declarator&); |
| 3099 | void ParseDeclaratorInternal(Declarator &D, |
| 3100 | DirectDeclParseFunction DirectDeclParser); |
| 3101 | |
| 3102 | enum AttrRequirements { |
| 3103 | AR_NoAttributesParsed = 0, ///< No attributes are diagnosed. |
| 3104 | AR_GNUAttributesParsedAndRejected = 1 << 0, ///< Diagnose GNU attributes. |
| 3105 | AR_GNUAttributesParsed = 1 << 1, |
| 3106 | AR_CXX11AttributesParsed = 1 << 2, |
| 3107 | AR_DeclspecAttributesParsed = 1 << 3, |
| 3108 | AR_AllAttributesParsed = AR_GNUAttributesParsed | |
| 3109 | AR_CXX11AttributesParsed | |
| 3110 | AR_DeclspecAttributesParsed, |
| 3111 | AR_VendorAttributesParsed = AR_GNUAttributesParsed | |
| 3112 | AR_DeclspecAttributesParsed |
| 3113 | }; |
| 3114 | |
| 3115 | void ParseTypeQualifierListOpt( |
| 3116 | DeclSpec &DS, unsigned AttrReqs = AR_AllAttributesParsed, |
| 3117 | bool AtomicAllowed = true, bool IdentifierRequired = false, |
| 3118 | std::optional<llvm::function_ref<void()>> CodeCompletionHandler = |
| 3119 | std::nullopt); |
| 3120 | void ParseDirectDeclarator(Declarator &D); |
| 3121 | void ParseDecompositionDeclarator(Declarator &D); |
| 3122 | void ParseParenDeclarator(Declarator &D); |
| 3123 | void ParseFunctionDeclarator(Declarator &D, ParsedAttributes &FirstArgAttrs, |
| 3124 | BalancedDelimiterTracker &Tracker, |
| 3125 | bool IsAmbiguous, bool RequiresArg = false); |
| 3126 | void InitCXXThisScopeForDeclaratorIfRelevant( |
| 3127 | const Declarator &D, const DeclSpec &DS, |
| 3128 | std::optional<Sema::CXXThisScopeRAII> &ThisScope); |
| 3129 | bool ParseRefQualifier(bool &RefQualifierIsLValueRef, |
| 3130 | SourceLocation &RefQualifierLoc); |
| 3131 | bool isFunctionDeclaratorIdentifierList(); |
| 3132 | void ParseFunctionDeclaratorIdentifierList( |
| 3133 | Declarator &D, |
| 3134 | SmallVectorImpl<DeclaratorChunk::ParamInfo> &ParamInfo); |
| 3135 | void ParseParameterDeclarationClause( |
| 3136 | Declarator &D, ParsedAttributes &attrs, |
| 3137 | SmallVectorImpl<DeclaratorChunk::ParamInfo> &ParamInfo, |
| 3138 | SourceLocation &EllipsisLoc) { |
| 3139 | return ParseParameterDeclarationClause( |
| 3140 | D.getContext(), attrs, ParamInfo, EllipsisLoc, |
| 3141 | D.getCXXScopeSpec().isSet() && |
| 3142 | D.isFunctionDeclaratorAFunctionDeclaration()); |
| 3143 | } |
| 3144 | void ParseParameterDeclarationClause( |
| 3145 | DeclaratorContext DeclaratorContext, ParsedAttributes &attrs, |
| 3146 | SmallVectorImpl<DeclaratorChunk::ParamInfo> &ParamInfo, |
| 3147 | SourceLocation &EllipsisLoc, bool IsACXXFunctionDeclaration = false); |
| 3148 | |
| 3149 | void ParseBracketDeclarator(Declarator &D); |
| 3150 | void ParseMisplacedBracketDeclarator(Declarator &D); |
| 3151 | bool MaybeParseTypeTransformTypeSpecifier(DeclSpec &DS); |
| 3152 | DeclSpec::TST TypeTransformTokToDeclSpec(); |
| 3153 | |
| 3154 | //===--------------------------------------------------------------------===// |
| 3155 | // C++ 7: Declarations [dcl.dcl] |
| 3156 | |
| 3157 | /// The kind of attribute specifier we have found. |
| 3158 | enum CXX11AttributeKind { |
| 3159 | /// This is not an attribute specifier. |
| 3160 | CAK_NotAttributeSpecifier, |
| 3161 | /// This should be treated as an attribute-specifier. |
| 3162 | CAK_AttributeSpecifier, |
| 3163 | /// The next tokens are '[[', but this is not an attribute-specifier. This |
| 3164 | /// is ill-formed by C++11 [dcl.attr.grammar]p6. |
| 3165 | CAK_InvalidAttributeSpecifier |
| 3166 | }; |
| 3167 | CXX11AttributeKind |
| 3168 | isCXX11AttributeSpecifier(bool Disambiguate = false, |
| 3169 | bool OuterMightBeMessageSend = false); |
| 3170 | |
| 3171 | void DiagnoseUnexpectedNamespace(NamedDecl *Context); |
| 3172 | |
| 3173 | DeclGroupPtrTy ParseNamespace(DeclaratorContext Context, |
| 3174 | SourceLocation &DeclEnd, |
| 3175 | SourceLocation InlineLoc = SourceLocation()); |
| 3176 | |
| 3177 | struct InnerNamespaceInfo { |
| 3178 | SourceLocation NamespaceLoc; |
| 3179 | SourceLocation InlineLoc; |
| 3180 | SourceLocation IdentLoc; |
| 3181 | IdentifierInfo *Ident; |
| 3182 | }; |
| 3183 | using InnerNamespaceInfoList = llvm::SmallVector<InnerNamespaceInfo, 4>; |
| 3184 | |
| 3185 | void ParseInnerNamespace(const InnerNamespaceInfoList &InnerNSs, |
| 3186 | unsigned int index, SourceLocation &InlineLoc, |
| 3187 | ParsedAttributes &attrs, |
| 3188 | BalancedDelimiterTracker &Tracker); |
| 3189 | Decl *ParseLinkage(ParsingDeclSpec &DS, DeclaratorContext Context); |
| 3190 | Decl *ParseExportDeclaration(); |
| 3191 | DeclGroupPtrTy ParseUsingDirectiveOrDeclaration( |
| 3192 | DeclaratorContext Context, const ParsedTemplateInfo &TemplateInfo, |
| 3193 | SourceLocation &DeclEnd, ParsedAttributes &Attrs); |
| 3194 | Decl *ParseUsingDirective(DeclaratorContext Context, |
| 3195 | SourceLocation UsingLoc, |
| 3196 | SourceLocation &DeclEnd, |
| 3197 | ParsedAttributes &attrs); |
| 3198 | |
| 3199 | struct UsingDeclarator { |
| 3200 | SourceLocation TypenameLoc; |
| 3201 | CXXScopeSpec SS; |
| 3202 | UnqualifiedId Name; |
| 3203 | SourceLocation EllipsisLoc; |
| 3204 | |
| 3205 | void clear() { |
| 3206 | TypenameLoc = EllipsisLoc = SourceLocation(); |
| 3207 | SS.clear(); |
| 3208 | Name.clear(); |
| 3209 | } |
| 3210 | }; |
| 3211 | |
| 3212 | bool ParseUsingDeclarator(DeclaratorContext Context, UsingDeclarator &D); |
| 3213 | DeclGroupPtrTy ParseUsingDeclaration(DeclaratorContext Context, |
| 3214 | const ParsedTemplateInfo &TemplateInfo, |
| 3215 | SourceLocation UsingLoc, |
| 3216 | SourceLocation &DeclEnd, |
| 3217 | ParsedAttributes &Attrs, |
| 3218 | AccessSpecifier AS = AS_none); |
| 3219 | Decl *ParseAliasDeclarationAfterDeclarator( |
| 3220 | const ParsedTemplateInfo &TemplateInfo, SourceLocation UsingLoc, |
| 3221 | UsingDeclarator &D, SourceLocation &DeclEnd, AccessSpecifier AS, |
| 3222 | ParsedAttributes &Attrs, Decl **OwnedType = nullptr); |
| 3223 | |
| 3224 | Decl *ParseStaticAssertDeclaration(SourceLocation &DeclEnd); |
| 3225 | Decl *ParseNamespaceAlias(SourceLocation NamespaceLoc, |
| 3226 | SourceLocation AliasLoc, IdentifierInfo *Alias, |
| 3227 | SourceLocation &DeclEnd); |
| 3228 | |
| 3229 | //===--------------------------------------------------------------------===// |
| 3230 | // C++ 9: classes [class] and C structs/unions. |
| 3231 | bool isValidAfterTypeSpecifier(bool CouldBeBitfield); |
| 3232 | void ParseClassSpecifier(tok::TokenKind TagTokKind, SourceLocation TagLoc, |
| 3233 | DeclSpec &DS, const ParsedTemplateInfo &TemplateInfo, |
| 3234 | AccessSpecifier AS, bool EnteringContext, |
| 3235 | DeclSpecContext DSC, ParsedAttributes &Attributes); |
| 3236 | void SkipCXXMemberSpecification(SourceLocation StartLoc, |
| 3237 | SourceLocation AttrFixitLoc, |
| 3238 | unsigned TagType, |
| 3239 | Decl *TagDecl); |
| 3240 | void ParseCXXMemberSpecification(SourceLocation StartLoc, |
| 3241 | SourceLocation AttrFixitLoc, |
| 3242 | ParsedAttributes &Attrs, unsigned TagType, |
| 3243 | Decl *TagDecl); |
| 3244 | ExprResult ParseCXXMemberInitializer(Decl *D, bool IsFunction, |
| 3245 | SourceLocation &EqualLoc); |
| 3246 | bool |
| 3247 | ParseCXXMemberDeclaratorBeforeInitializer(Declarator &DeclaratorInfo, |
| 3248 | VirtSpecifiers &VS, |
| 3249 | ExprResult &BitfieldSize, |
| 3250 | LateParsedAttrList &LateAttrs); |
| 3251 | void MaybeParseAndDiagnoseDeclSpecAfterCXX11VirtSpecifierSeq(Declarator &D, |
| 3252 | VirtSpecifiers &VS); |
| 3253 | DeclGroupPtrTy ParseCXXClassMemberDeclaration( |
| 3254 | AccessSpecifier AS, ParsedAttributes &Attr, |
| 3255 | const ParsedTemplateInfo &TemplateInfo = ParsedTemplateInfo(), |
| 3256 | ParsingDeclRAIIObject *DiagsFromTParams = nullptr); |
| 3257 | DeclGroupPtrTy |
| 3258 | ParseCXXClassMemberDeclarationWithPragmas(AccessSpecifier &AS, |
| 3259 | ParsedAttributes &AccessAttrs, |
| 3260 | DeclSpec::TST TagType, Decl *Tag); |
| 3261 | void ParseConstructorInitializer(Decl *ConstructorDecl); |
| 3262 | MemInitResult ParseMemInitializer(Decl *ConstructorDecl); |
| 3263 | void HandleMemberFunctionDeclDelays(Declarator& DeclaratorInfo, |
| 3264 | Decl *ThisDecl); |
| 3265 | |
| 3266 | //===--------------------------------------------------------------------===// |
| 3267 | // C++ 10: Derived classes [class.derived] |
| 3268 | TypeResult ParseBaseTypeSpecifier(SourceLocation &BaseLoc, |
| 3269 | SourceLocation &EndLocation); |
| 3270 | void ParseBaseClause(Decl *ClassDecl); |
| 3271 | BaseResult ParseBaseSpecifier(Decl *ClassDecl); |
| 3272 | AccessSpecifier getAccessSpecifierIfPresent() const; |
| 3273 | |
| 3274 | bool ParseUnqualifiedIdTemplateId(CXXScopeSpec &SS, |
| 3275 | ParsedType ObjectType, |
| 3276 | bool ObjectHadErrors, |
| 3277 | SourceLocation TemplateKWLoc, |
| 3278 | IdentifierInfo *Name, |
| 3279 | SourceLocation NameLoc, |
| 3280 | bool EnteringContext, |
| 3281 | UnqualifiedId &Id, |
| 3282 | bool AssumeTemplateId); |
| 3283 | bool ParseUnqualifiedIdOperator(CXXScopeSpec &SS, bool EnteringContext, |
| 3284 | ParsedType ObjectType, |
| 3285 | UnqualifiedId &Result); |
| 3286 | |
| 3287 | //===--------------------------------------------------------------------===// |
| 3288 | // OpenMP: Directives and clauses. |
| 3289 | /// Parse clauses for '#pragma omp declare simd'. |
| 3290 | DeclGroupPtrTy ParseOMPDeclareSimdClauses(DeclGroupPtrTy Ptr, |
| 3291 | CachedTokens &Toks, |
| 3292 | SourceLocation Loc); |
| 3293 | |
| 3294 | /// Parse a property kind into \p TIProperty for the selector set \p Set and |
| 3295 | /// selector \p Selector. |
| 3296 | void parseOMPTraitPropertyKind(OMPTraitProperty &TIProperty, |
| 3297 | llvm::omp::TraitSet Set, |
| 3298 | llvm::omp::TraitSelector Selector, |
| 3299 | llvm::StringMap<SourceLocation> &Seen); |
| 3300 | |
| 3301 | /// Parse a selector kind into \p TISelector for the selector set \p Set. |
| 3302 | void parseOMPTraitSelectorKind(OMPTraitSelector &TISelector, |
| 3303 | llvm::omp::TraitSet Set, |
| 3304 | llvm::StringMap<SourceLocation> &Seen); |
| 3305 | |
| 3306 | /// Parse a selector set kind into \p TISet. |
| 3307 | void parseOMPTraitSetKind(OMPTraitSet &TISet, |
| 3308 | llvm::StringMap<SourceLocation> &Seen); |
| 3309 | |
| 3310 | /// Parses an OpenMP context property. |
| 3311 | void parseOMPContextProperty(OMPTraitSelector &TISelector, |
| 3312 | llvm::omp::TraitSet Set, |
| 3313 | llvm::StringMap<SourceLocation> &Seen); |
| 3314 | |
| 3315 | /// Parses an OpenMP context selector. |
| 3316 | void parseOMPContextSelector(OMPTraitSelector &TISelector, |
| 3317 | llvm::omp::TraitSet Set, |
| 3318 | llvm::StringMap<SourceLocation> &SeenSelectors); |
| 3319 | |
| 3320 | /// Parses an OpenMP context selector set. |
| 3321 | void parseOMPContextSelectorSet(OMPTraitSet &TISet, |
| 3322 | llvm::StringMap<SourceLocation> &SeenSets); |
| 3323 | |
| 3324 | /// Parses OpenMP context selectors. |
| 3325 | bool parseOMPContextSelectors(SourceLocation Loc, OMPTraitInfo &TI); |
| 3326 | |
| 3327 | /// Parse an 'append_args' clause for '#pragma omp declare variant'. |
| 3328 | bool parseOpenMPAppendArgs(SmallVectorImpl<OMPInteropInfo> &InteropInfos); |
| 3329 | |
| 3330 | /// Parse a `match` clause for an '#pragma omp declare variant'. Return true |
| 3331 | /// if there was an error. |
| 3332 | bool parseOMPDeclareVariantMatchClause(SourceLocation Loc, OMPTraitInfo &TI, |
| 3333 | OMPTraitInfo *ParentTI); |
| 3334 | |
| 3335 | /// Parse clauses for '#pragma omp declare variant'. |
| 3336 | void ParseOMPDeclareVariantClauses(DeclGroupPtrTy Ptr, CachedTokens &Toks, |
| 3337 | SourceLocation Loc); |
| 3338 | |
| 3339 | /// Parse 'omp [begin] assume[s]' directive. |
| 3340 | void ParseOpenMPAssumesDirective(OpenMPDirectiveKind DKind, |
| 3341 | SourceLocation Loc); |
| 3342 | |
| 3343 | /// Parse 'omp end assumes' directive. |
| 3344 | void ParseOpenMPEndAssumesDirective(SourceLocation Loc); |
| 3345 | |
| 3346 | /// Parses clauses for directive. |
| 3347 | /// |
| 3348 | /// \param DKind Kind of current directive. |
| 3349 | /// \param clauses for current directive. |
| 3350 | /// \param start location for clauses of current directive |
| 3351 | void ParseOpenMPClauses(OpenMPDirectiveKind DKind, |
| 3352 | SmallVectorImpl<clang::OMPClause *> &Clauses, |
| 3353 | SourceLocation Loc); |
| 3354 | |
| 3355 | /// Parse clauses for '#pragma omp [begin] declare target'. |
| 3356 | void ParseOMPDeclareTargetClauses(Sema::DeclareTargetContextInfo &DTCI); |
| 3357 | |
| 3358 | /// Parse '#pragma omp end declare target'. |
| 3359 | void ParseOMPEndDeclareTargetDirective(OpenMPDirectiveKind BeginDKind, |
| 3360 | OpenMPDirectiveKind EndDKind, |
| 3361 | SourceLocation Loc); |
| 3362 | |
| 3363 | /// Skip tokens until a `annot_pragma_openmp_end` was found. Emit a warning if |
| 3364 | /// it is not the current token. |
| 3365 | void skipUntilPragmaOpenMPEnd(OpenMPDirectiveKind DKind); |
| 3366 | |
| 3367 | /// Check the \p FoundKind against the \p ExpectedKind, if not issue an error |
| 3368 | /// that the "end" matching the "begin" directive of kind \p BeginKind was not |
| 3369 | /// found. Finally, if the expected kind was found or if \p SkipUntilOpenMPEnd |
| 3370 | /// is set, skip ahead using the helper `skipUntilPragmaOpenMPEnd`. |
| 3371 | void parseOMPEndDirective(OpenMPDirectiveKind BeginKind, |
| 3372 | OpenMPDirectiveKind ExpectedKind, |
| 3373 | OpenMPDirectiveKind FoundKind, |
| 3374 | SourceLocation MatchingLoc, |
| 3375 | SourceLocation FoundLoc, |
| 3376 | bool SkipUntilOpenMPEnd); |
| 3377 | |
| 3378 | /// Parses declarative OpenMP directives. |
| 3379 | DeclGroupPtrTy ParseOpenMPDeclarativeDirectiveWithExtDecl( |
| 3380 | AccessSpecifier &AS, ParsedAttributes &Attrs, bool Delayed = false, |
| 3381 | DeclSpec::TST TagType = DeclSpec::TST_unspecified, |
| 3382 | Decl *TagDecl = nullptr); |
| 3383 | /// Parse 'omp declare reduction' construct. |
| 3384 | DeclGroupPtrTy ParseOpenMPDeclareReductionDirective(AccessSpecifier AS); |
| 3385 | /// Parses initializer for provided omp_priv declaration inside the reduction |
| 3386 | /// initializer. |
| 3387 | void ParseOpenMPReductionInitializerForDecl(VarDecl *OmpPrivParm); |
| 3388 | |
| 3389 | /// Parses 'omp declare mapper' directive. |
| 3390 | DeclGroupPtrTy ParseOpenMPDeclareMapperDirective(AccessSpecifier AS); |
| 3391 | /// Parses variable declaration in 'omp declare mapper' directive. |
| 3392 | TypeResult parseOpenMPDeclareMapperVarDecl(SourceRange &Range, |
| 3393 | DeclarationName &Name, |
| 3394 | AccessSpecifier AS = AS_none); |
| 3395 | |
| 3396 | /// Tries to parse cast part of OpenMP array shaping operation: |
| 3397 | /// '[' expression ']' { '[' expression ']' } ')'. |
| 3398 | bool tryParseOpenMPArrayShapingCastPart(); |
| 3399 | |
| 3400 | /// Parses simple list of variables. |
| 3401 | /// |
| 3402 | /// \param Kind Kind of the directive. |
| 3403 | /// \param Callback Callback function to be called for the list elements. |
| 3404 | /// \param AllowScopeSpecifier true, if the variables can have fully |
| 3405 | /// qualified names. |
| 3406 | /// |
| 3407 | bool ParseOpenMPSimpleVarList( |
| 3408 | OpenMPDirectiveKind Kind, |
| 3409 | const llvm::function_ref<void(CXXScopeSpec &, DeclarationNameInfo)> & |
| 3410 | Callback, |
| 3411 | bool AllowScopeSpecifier); |
| 3412 | /// Parses declarative or executable directive. |
| 3413 | /// |
| 3414 | /// \param StmtCtx The context in which we're parsing the directive. |
| 3415 | /// \param ReadDirectiveWithinMetadirective true if directive is within a |
| 3416 | /// metadirective and therefore ends on the closing paren. |
| 3417 | StmtResult ParseOpenMPDeclarativeOrExecutableDirective( |
| 3418 | ParsedStmtContext StmtCtx, bool ReadDirectiveWithinMetadirective = false); |
| 3419 | /// Parses clause of kind \a CKind for directive of a kind \a Kind. |
| 3420 | /// |
| 3421 | /// \param DKind Kind of current directive. |
| 3422 | /// \param CKind Kind of current clause. |
| 3423 | /// \param FirstClause true, if this is the first clause of a kind \a CKind |
| 3424 | /// in current directive. |
| 3425 | /// |
| 3426 | OMPClause *ParseOpenMPClause(OpenMPDirectiveKind DKind, |
| 3427 | OpenMPClauseKind CKind, bool FirstClause); |
| 3428 | /// Parses clause with a single expression of a kind \a Kind. |
| 3429 | /// |
| 3430 | /// \param Kind Kind of current clause. |
| 3431 | /// \param ParseOnly true to skip the clause's semantic actions and return |
| 3432 | /// nullptr. |
| 3433 | /// |
| 3434 | OMPClause *ParseOpenMPSingleExprClause(OpenMPClauseKind Kind, |
| 3435 | bool ParseOnly); |
| 3436 | /// Parses simple clause of a kind \a Kind. |
| 3437 | /// |
| 3438 | /// \param Kind Kind of current clause. |
| 3439 | /// \param ParseOnly true to skip the clause's semantic actions and return |
| 3440 | /// nullptr. |
| 3441 | /// |
| 3442 | OMPClause *ParseOpenMPSimpleClause(OpenMPClauseKind Kind, bool ParseOnly); |
| 3443 | /// Parses indirect clause |
| 3444 | /// \param ParseOnly true to skip the clause's semantic actions and return |
| 3445 | // false; |
| 3446 | bool ParseOpenMPIndirectClause(Sema::DeclareTargetContextInfo &DTCI, |
| 3447 | bool ParseOnly); |
| 3448 | /// Parses clause with a single expression and an additional argument |
| 3449 | /// of a kind \a Kind. |
| 3450 | /// |
| 3451 | /// \param DKind Directive kind. |
| 3452 | /// \param Kind Kind of current clause. |
| 3453 | /// \param ParseOnly true to skip the clause's semantic actions and return |
| 3454 | /// nullptr. |
| 3455 | /// |
| 3456 | OMPClause *ParseOpenMPSingleExprWithArgClause(OpenMPDirectiveKind DKind, |
| 3457 | OpenMPClauseKind Kind, |
| 3458 | bool ParseOnly); |
| 3459 | |
| 3460 | /// Parses the 'sizes' clause of a '#pragma omp tile' directive. |
| 3461 | OMPClause *ParseOpenMPSizesClause(); |
| 3462 | |
| 3463 | /// Parses clause without any additional arguments. |
| 3464 | /// |
| 3465 | /// \param Kind Kind of current clause. |
| 3466 | /// \param ParseOnly true to skip the clause's semantic actions and return |
| 3467 | /// nullptr. |
| 3468 | /// |
| 3469 | OMPClause *ParseOpenMPClause(OpenMPClauseKind Kind, bool ParseOnly = false); |
| 3470 | /// Parses clause with the list of variables of a kind \a Kind. |
| 3471 | /// |
| 3472 | /// \param Kind Kind of current clause. |
| 3473 | /// \param ParseOnly true to skip the clause's semantic actions and return |
| 3474 | /// nullptr. |
| 3475 | /// |
| 3476 | OMPClause *ParseOpenMPVarListClause(OpenMPDirectiveKind DKind, |
| 3477 | OpenMPClauseKind Kind, bool ParseOnly); |
| 3478 | |
| 3479 | /// Parses and creates OpenMP 5.0 iterators expression: |
| 3480 | /// <iterators> = 'iterator' '(' { [ <iterator-type> ] identifier = |
| 3481 | /// <range-specification> }+ ')' |
| 3482 | ExprResult ParseOpenMPIteratorsExpr(); |
| 3483 | |
| 3484 | /// Parses allocators and traits in the context of the uses_allocator clause. |
| 3485 | /// Expected format: |
| 3486 | /// '(' { <allocator> [ '(' <allocator_traits> ')' ] }+ ')' |
| 3487 | OMPClause *ParseOpenMPUsesAllocatorClause(OpenMPDirectiveKind DKind); |
| 3488 | |
| 3489 | /// Parses the 'interop' parts of the 'append_args' and 'init' clauses. |
| 3490 | bool ParseOMPInteropInfo(OMPInteropInfo &InteropInfo, OpenMPClauseKind Kind); |
| 3491 | |
| 3492 | /// Parses clause with an interop variable of kind \a Kind. |
| 3493 | /// |
| 3494 | /// \param Kind Kind of current clause. |
| 3495 | /// \param ParseOnly true to skip the clause's semantic actions and return |
| 3496 | /// nullptr. |
| 3497 | // |
| 3498 | OMPClause *ParseOpenMPInteropClause(OpenMPClauseKind Kind, bool ParseOnly); |
| 3499 | |
| 3500 | /// Parses a ompx_attribute clause |
| 3501 | /// |
| 3502 | /// \param ParseOnly true to skip the clause's semantic actions and return |
| 3503 | /// nullptr. |
| 3504 | // |
| 3505 | OMPClause *ParseOpenMPOMPXAttributesClause(bool ParseOnly); |
| 3506 | |
| 3507 | public: |
| 3508 | /// Parses simple expression in parens for single-expression clauses of OpenMP |
| 3509 | /// constructs. |
| 3510 | /// \param RLoc Returned location of right paren. |
| 3511 | ExprResult ParseOpenMPParensExpr(StringRef ClauseName, SourceLocation &RLoc, |
| 3512 | bool IsAddressOfOperand = false); |
| 3513 | |
| 3514 | /// Parses a reserved locator like 'omp_all_memory'. |
| 3515 | bool ParseOpenMPReservedLocator(OpenMPClauseKind Kind, |
| 3516 | Sema::OpenMPVarListDataTy &Data, |
| 3517 | const LangOptions &LangOpts); |
| 3518 | /// Parses clauses with list. |
| 3519 | bool ParseOpenMPVarList(OpenMPDirectiveKind DKind, OpenMPClauseKind Kind, |
| 3520 | SmallVectorImpl<Expr *> &Vars, |
| 3521 | Sema::OpenMPVarListDataTy &Data); |
| 3522 | bool ParseUnqualifiedId(CXXScopeSpec &SS, ParsedType ObjectType, |
| 3523 | bool ObjectHadErrors, bool EnteringContext, |
| 3524 | bool AllowDestructorName, bool AllowConstructorName, |
| 3525 | bool AllowDeductionGuide, |
| 3526 | SourceLocation *TemplateKWLoc, UnqualifiedId &Result); |
| 3527 | |
| 3528 | /// Parses the mapper modifier in map, to, and from clauses. |
| 3529 | bool parseMapperModifier(Sema::OpenMPVarListDataTy &Data); |
| 3530 | /// Parses map-type-modifiers in map clause. |
| 3531 | /// map([ [map-type-modifier[,] [map-type-modifier[,] ...] map-type : ] list) |
| 3532 | /// where, map-type-modifier ::= always | close | mapper(mapper-identifier) |
| 3533 | bool parseMapTypeModifiers(Sema::OpenMPVarListDataTy &Data); |
| 3534 | |
| 3535 | private: |
| 3536 | //===--------------------------------------------------------------------===// |
| 3537 | // C++ 14: Templates [temp] |
| 3538 | |
| 3539 | // C++ 14.1: Template Parameters [temp.param] |
| 3540 | Decl *ParseDeclarationStartingWithTemplate(DeclaratorContext Context, |
| 3541 | SourceLocation &DeclEnd, |
| 3542 | ParsedAttributes &AccessAttrs, |
| 3543 | AccessSpecifier AS = AS_none); |
| 3544 | Decl *ParseTemplateDeclarationOrSpecialization(DeclaratorContext Context, |
| 3545 | SourceLocation &DeclEnd, |
| 3546 | ParsedAttributes &AccessAttrs, |
| 3547 | AccessSpecifier AS); |
| 3548 | Decl *ParseSingleDeclarationAfterTemplate( |
| 3549 | DeclaratorContext Context, const ParsedTemplateInfo &TemplateInfo, |
| 3550 | ParsingDeclRAIIObject &DiagsFromParams, SourceLocation &DeclEnd, |
| 3551 | ParsedAttributes &AccessAttrs, AccessSpecifier AS = AS_none); |
| 3552 | bool ParseTemplateParameters(MultiParseScope &TemplateScopes, unsigned Depth, |
| 3553 | SmallVectorImpl<NamedDecl *> &TemplateParams, |
| 3554 | SourceLocation &LAngleLoc, |
| 3555 | SourceLocation &RAngleLoc); |
| 3556 | bool ParseTemplateParameterList(unsigned Depth, |
| 3557 | SmallVectorImpl<NamedDecl*> &TemplateParams); |
| 3558 | TPResult isStartOfTemplateTypeParameter(); |
| 3559 | NamedDecl *ParseTemplateParameter(unsigned Depth, unsigned Position); |
| 3560 | NamedDecl *ParseTypeParameter(unsigned Depth, unsigned Position); |
| 3561 | NamedDecl *ParseTemplateTemplateParameter(unsigned Depth, unsigned Position); |
| 3562 | NamedDecl *ParseNonTypeTemplateParameter(unsigned Depth, unsigned Position); |
| 3563 | bool isTypeConstraintAnnotation(); |
| 3564 | bool TryAnnotateTypeConstraint(); |
| 3565 | void DiagnoseMisplacedEllipsis(SourceLocation EllipsisLoc, |
| 3566 | SourceLocation CorrectLoc, |
| 3567 | bool AlreadyHasEllipsis, |
| 3568 | bool IdentifierHasName); |
| 3569 | void DiagnoseMisplacedEllipsisInDeclarator(SourceLocation EllipsisLoc, |
| 3570 | Declarator &D); |
| 3571 | // C++ 14.3: Template arguments [temp.arg] |
| 3572 | typedef SmallVector<ParsedTemplateArgument, 16> TemplateArgList; |
| 3573 | |
| 3574 | bool ParseGreaterThanInTemplateList(SourceLocation LAngleLoc, |
| 3575 | SourceLocation &RAngleLoc, |
| 3576 | bool ConsumeLastToken, |
| 3577 | bool ObjCGenericList); |
| 3578 | bool ParseTemplateIdAfterTemplateName(bool ConsumeLastToken, |
| 3579 | SourceLocation &LAngleLoc, |
| 3580 | TemplateArgList &TemplateArgs, |
| 3581 | SourceLocation &RAngleLoc, |
| 3582 | TemplateTy NameHint = nullptr); |
| 3583 | |
| 3584 | bool AnnotateTemplateIdToken(TemplateTy Template, TemplateNameKind TNK, |
| 3585 | CXXScopeSpec &SS, |
| 3586 | SourceLocation TemplateKWLoc, |
| 3587 | UnqualifiedId &TemplateName, |
| 3588 | bool AllowTypeAnnotation = true, |
| 3589 | bool TypeConstraint = false); |
| 3590 | void |
| 3591 | AnnotateTemplateIdTokenAsType(CXXScopeSpec &SS, |
| 3592 | ImplicitTypenameContext AllowImplicitTypename, |
| 3593 | bool IsClassName = false); |
| 3594 | bool ParseTemplateArgumentList(TemplateArgList &TemplateArgs, |
| 3595 | TemplateTy Template, SourceLocation OpenLoc); |
| 3596 | ParsedTemplateArgument ParseTemplateTemplateArgument(); |
| 3597 | ParsedTemplateArgument ParseTemplateArgument(); |
| 3598 | Decl *ParseExplicitInstantiation(DeclaratorContext Context, |
| 3599 | SourceLocation ExternLoc, |
| 3600 | SourceLocation TemplateLoc, |
| 3601 | SourceLocation &DeclEnd, |
| 3602 | ParsedAttributes &AccessAttrs, |
| 3603 | AccessSpecifier AS = AS_none); |
| 3604 | // C++2a: Template, concept definition [temp] |
| 3605 | Decl * |
| 3606 | ParseConceptDefinition(const ParsedTemplateInfo &TemplateInfo, |
| 3607 | SourceLocation &DeclEnd); |
| 3608 | |
| 3609 | //===--------------------------------------------------------------------===// |
| 3610 | // Modules |
| 3611 | DeclGroupPtrTy ParseModuleDecl(Sema::ModuleImportState &ImportState); |
| 3612 | Decl *ParseModuleImport(SourceLocation AtLoc, |
| 3613 | Sema::ModuleImportState &ImportState); |
| 3614 | bool parseMisplacedModuleImport(); |
| 3615 | bool tryParseMisplacedModuleImport() { |
| 3616 | tok::TokenKind Kind = Tok.getKind(); |
| 3617 | if (Kind == tok::annot_module_begin || Kind == tok::annot_module_end || |
| 3618 | Kind == tok::annot_module_include) |
| 3619 | return parseMisplacedModuleImport(); |
| 3620 | return false; |
| 3621 | } |
| 3622 | |
| 3623 | bool ParseModuleName( |
| 3624 | SourceLocation UseLoc, |
| 3625 | SmallVectorImpl<std::pair<IdentifierInfo *, SourceLocation>> &Path, |
| 3626 | bool IsImport); |
| 3627 | |
| 3628 | //===--------------------------------------------------------------------===// |
| 3629 | // C++11/G++: Type Traits [Type-Traits.html in the GCC manual] |
| 3630 | ExprResult ParseTypeTrait(); |
| 3631 | |
| 3632 | //===--------------------------------------------------------------------===// |
| 3633 | // Embarcadero: Arary and Expression Traits |
| 3634 | ExprResult ParseArrayTypeTrait(); |
| 3635 | ExprResult ParseExpressionTrait(); |
| 3636 | |
| 3637 | //===--------------------------------------------------------------------===// |
| 3638 | // Preprocessor code-completion pass-through |
| 3639 | void CodeCompleteDirective(bool InConditional) override; |
| 3640 | void CodeCompleteInConditionalExclusion() override; |
| 3641 | void CodeCompleteMacroName(bool IsDefinition) override; |
| 3642 | void CodeCompletePreprocessorExpression() override; |
| 3643 | void CodeCompleteMacroArgument(IdentifierInfo *Macro, MacroInfo *MacroInfo, |
| 3644 | unsigned ArgumentIndex) override; |
| 3645 | void CodeCompleteIncludedFile(llvm::StringRef Dir, bool IsAngled) override; |
| 3646 | void CodeCompleteNaturalLanguage() override; |
| 3647 | |
| 3648 | class GNUAsmQualifiers { |
| 3649 | unsigned Qualifiers = AQ_unspecified; |
| 3650 | |
| 3651 | public: |
| 3652 | enum AQ { |
| 3653 | AQ_unspecified = 0, |
| 3654 | AQ_volatile = 1, |
| 3655 | AQ_inline = 2, |
| 3656 | AQ_goto = 4, |
| 3657 | }; |
| 3658 | static const char *getQualifierName(AQ Qualifier); |
| 3659 | bool setAsmQualifier(AQ Qualifier); |
| 3660 | inline bool isVolatile() const { return Qualifiers & AQ_volatile; }; |
| 3661 | inline bool isInline() const { return Qualifiers & AQ_inline; }; |
| 3662 | inline bool isGoto() const { return Qualifiers & AQ_goto; } |
| 3663 | }; |
| 3664 | bool isGCCAsmStatement(const Token &TokAfterAsm) const; |
| 3665 | bool isGNUAsmQualifier(const Token &TokAfterAsm) const; |
| 3666 | GNUAsmQualifiers::AQ getGNUAsmQualifier(const Token &Tok) const; |
| 3667 | bool parseGNUAsmQualifierListOpt(GNUAsmQualifiers &AQ); |
| 3668 | }; |
| 3669 | |
| 3670 | } // end namespace clang |
| 3671 | |
| 3672 | #endif |