clang  5.0.0svn
ParseCXXInlineMethods.cpp
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1 //===--- ParseCXXInlineMethods.cpp - C++ class inline methods parsing------===//
2 //
3 // The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 //
10 // This file implements parsing for C++ class inline methods.
11 //
12 //===----------------------------------------------------------------------===//
13 
14 #include "clang/Parse/Parser.h"
15 #include "RAIIObjectsForParser.h"
16 #include "clang/AST/DeclTemplate.h"
18 #include "clang/Sema/DeclSpec.h"
19 #include "clang/Sema/Scope.h"
20 using namespace clang;
21 
22 /// ParseCXXInlineMethodDef - We parsed and verified that the specified
23 /// Declarator is a well formed C++ inline method definition. Now lex its body
24 /// and store its tokens for parsing after the C++ class is complete.
25 NamedDecl *Parser::ParseCXXInlineMethodDef(AccessSpecifier AS,
26  AttributeList *AccessAttrs,
28  const ParsedTemplateInfo &TemplateInfo,
29  const VirtSpecifiers& VS,
30  SourceLocation PureSpecLoc) {
31  assert(D.isFunctionDeclarator() && "This isn't a function declarator!");
32  assert(Tok.isOneOf(tok::l_brace, tok::colon, tok::kw_try, tok::equal) &&
33  "Current token not a '{', ':', '=', or 'try'!");
34 
35  MultiTemplateParamsArg TemplateParams(
36  TemplateInfo.TemplateParams ? TemplateInfo.TemplateParams->data()
37  : nullptr,
38  TemplateInfo.TemplateParams ? TemplateInfo.TemplateParams->size() : 0);
39 
40  NamedDecl *FnD;
42  FnD = Actions.ActOnFriendFunctionDecl(getCurScope(), D,
43  TemplateParams);
44  else {
45  FnD = Actions.ActOnCXXMemberDeclarator(getCurScope(), AS, D,
46  TemplateParams, nullptr,
47  VS, ICIS_NoInit);
48  if (FnD) {
49  Actions.ProcessDeclAttributeList(getCurScope(), FnD, AccessAttrs);
50  if (PureSpecLoc.isValid())
51  Actions.ActOnPureSpecifier(FnD, PureSpecLoc);
52  }
53  }
54 
55  if (FnD)
56  HandleMemberFunctionDeclDelays(D, FnD);
57 
58  D.complete(FnD);
59 
60  if (TryConsumeToken(tok::equal)) {
61  if (!FnD) {
62  SkipUntil(tok::semi);
63  return nullptr;
64  }
65 
66  bool Delete = false;
67  SourceLocation KWLoc;
68  SourceLocation KWEndLoc = Tok.getEndLoc().getLocWithOffset(-1);
69  if (TryConsumeToken(tok::kw_delete, KWLoc)) {
71  ? diag::warn_cxx98_compat_defaulted_deleted_function
72  : diag::ext_defaulted_deleted_function)
73  << 1 /* deleted */;
74  Actions.SetDeclDeleted(FnD, KWLoc);
75  Delete = true;
76  if (auto *DeclAsFunction = dyn_cast<FunctionDecl>(FnD)) {
77  DeclAsFunction->setRangeEnd(KWEndLoc);
78  }
79  } else if (TryConsumeToken(tok::kw_default, KWLoc)) {
81  ? diag::warn_cxx98_compat_defaulted_deleted_function
82  : diag::ext_defaulted_deleted_function)
83  << 0 /* defaulted */;
84  Actions.SetDeclDefaulted(FnD, KWLoc);
85  if (auto *DeclAsFunction = dyn_cast<FunctionDecl>(FnD)) {
86  DeclAsFunction->setRangeEnd(KWEndLoc);
87  }
88  } else {
89  llvm_unreachable("function definition after = not 'delete' or 'default'");
90  }
91 
92  if (Tok.is(tok::comma)) {
93  Diag(KWLoc, diag::err_default_delete_in_multiple_declaration)
94  << Delete;
95  SkipUntil(tok::semi);
96  } else if (ExpectAndConsume(tok::semi, diag::err_expected_after,
97  Delete ? "delete" : "default")) {
98  SkipUntil(tok::semi);
99  }
100 
101  return FnD;
102  }
103 
104  if (SkipFunctionBodies && (!FnD || Actions.canSkipFunctionBody(FnD)) &&
105  trySkippingFunctionBody()) {
106  Actions.ActOnSkippedFunctionBody(FnD);
107  return FnD;
108  }
109 
110  // In delayed template parsing mode, if we are within a class template
111  // or if we are about to parse function member template then consume
112  // the tokens and store them for parsing at the end of the translation unit.
113  if (getLangOpts().DelayedTemplateParsing &&
116  !(FnD && FnD->getAsFunction() &&
117  FnD->getAsFunction()->getReturnType()->getContainedAutoType()) &&
118  ((Actions.CurContext->isDependentContext() ||
119  (TemplateInfo.Kind != ParsedTemplateInfo::NonTemplate &&
120  TemplateInfo.Kind != ParsedTemplateInfo::ExplicitSpecialization)) &&
122 
123  CachedTokens Toks;
124  LexTemplateFunctionForLateParsing(Toks);
125 
126  if (FnD) {
127  FunctionDecl *FD = FnD->getAsFunction();
128  Actions.CheckForFunctionRedefinition(FD);
129  Actions.MarkAsLateParsedTemplate(FD, FnD, Toks);
130  }
131 
132  return FnD;
133  }
134 
135  // Consume the tokens and store them for later parsing.
136 
137  LexedMethod* LM = new LexedMethod(this, FnD);
138  getCurrentClass().LateParsedDeclarations.push_back(LM);
139  LM->TemplateScope = getCurScope()->isTemplateParamScope();
140  CachedTokens &Toks = LM->Toks;
141 
142  tok::TokenKind kind = Tok.getKind();
143  // Consume everything up to (and including) the left brace of the
144  // function body.
145  if (ConsumeAndStoreFunctionPrologue(Toks)) {
146  // We didn't find the left-brace we expected after the
147  // constructor initializer; we already printed an error, and it's likely
148  // impossible to recover, so don't try to parse this method later.
149  // Skip over the rest of the decl and back to somewhere that looks
150  // reasonable.
152  delete getCurrentClass().LateParsedDeclarations.back();
153  getCurrentClass().LateParsedDeclarations.pop_back();
154  return FnD;
155  } else {
156  // Consume everything up to (and including) the matching right brace.
157  ConsumeAndStoreUntil(tok::r_brace, Toks, /*StopAtSemi=*/false);
158  }
159 
160  // If we're in a function-try-block, we need to store all the catch blocks.
161  if (kind == tok::kw_try) {
162  while (Tok.is(tok::kw_catch)) {
163  ConsumeAndStoreUntil(tok::l_brace, Toks, /*StopAtSemi=*/false);
164  ConsumeAndStoreUntil(tok::r_brace, Toks, /*StopAtSemi=*/false);
165  }
166  }
167 
168  if (FnD) {
169  // If this is a friend function, mark that it's late-parsed so that
170  // it's still known to be a definition even before we attach the
171  // parsed body. Sema needs to treat friend function definitions
172  // differently during template instantiation, and it's possible for
173  // the containing class to be instantiated before all its member
174  // function definitions are parsed.
175  //
176  // If you remove this, you can remove the code that clears the flag
177  // after parsing the member.
178  if (D.getDeclSpec().isFriendSpecified()) {
179  FunctionDecl *FD = FnD->getAsFunction();
180  Actions.CheckForFunctionRedefinition(FD);
181  FD->setLateTemplateParsed(true);
182  }
183  } else {
184  // If semantic analysis could not build a function declaration,
185  // just throw away the late-parsed declaration.
186  delete getCurrentClass().LateParsedDeclarations.back();
187  getCurrentClass().LateParsedDeclarations.pop_back();
188  }
189 
190  return FnD;
191 }
192 
193 /// ParseCXXNonStaticMemberInitializer - We parsed and verified that the
194 /// specified Declarator is a well formed C++ non-static data member
195 /// declaration. Now lex its initializer and store its tokens for parsing
196 /// after the class is complete.
197 void Parser::ParseCXXNonStaticMemberInitializer(Decl *VarD) {
198  assert(Tok.isOneOf(tok::l_brace, tok::equal) &&
199  "Current token not a '{' or '='!");
200 
201  LateParsedMemberInitializer *MI =
202  new LateParsedMemberInitializer(this, VarD);
203  getCurrentClass().LateParsedDeclarations.push_back(MI);
204  CachedTokens &Toks = MI->Toks;
205 
206  tok::TokenKind kind = Tok.getKind();
207  if (kind == tok::equal) {
208  Toks.push_back(Tok);
209  ConsumeToken();
210  }
211 
212  if (kind == tok::l_brace) {
213  // Begin by storing the '{' token.
214  Toks.push_back(Tok);
215  ConsumeBrace();
216 
217  // Consume everything up to (and including) the matching right brace.
218  ConsumeAndStoreUntil(tok::r_brace, Toks, /*StopAtSemi=*/true);
219  } else {
220  // Consume everything up to (but excluding) the comma or semicolon.
221  ConsumeAndStoreInitializer(Toks, CIK_DefaultInitializer);
222  }
223 
224  // Store an artificial EOF token to ensure that we don't run off the end of
225  // the initializer when we come to parse it.
226  Token Eof;
227  Eof.startToken();
228  Eof.setKind(tok::eof);
229  Eof.setLocation(Tok.getLocation());
230  Eof.setEofData(VarD);
231  Toks.push_back(Eof);
232 }
233 
234 Parser::LateParsedDeclaration::~LateParsedDeclaration() {}
235 void Parser::LateParsedDeclaration::ParseLexedMethodDeclarations() {}
236 void Parser::LateParsedDeclaration::ParseLexedMemberInitializers() {}
237 void Parser::LateParsedDeclaration::ParseLexedMethodDefs() {}
238 
239 Parser::LateParsedClass::LateParsedClass(Parser *P, ParsingClass *C)
240  : Self(P), Class(C) {}
241 
242 Parser::LateParsedClass::~LateParsedClass() {
243  Self->DeallocateParsedClasses(Class);
244 }
245 
246 void Parser::LateParsedClass::ParseLexedMethodDeclarations() {
247  Self->ParseLexedMethodDeclarations(*Class);
248 }
249 
250 void Parser::LateParsedClass::ParseLexedMemberInitializers() {
251  Self->ParseLexedMemberInitializers(*Class);
252 }
253 
254 void Parser::LateParsedClass::ParseLexedMethodDefs() {
255  Self->ParseLexedMethodDefs(*Class);
256 }
257 
258 void Parser::LateParsedMethodDeclaration::ParseLexedMethodDeclarations() {
259  Self->ParseLexedMethodDeclaration(*this);
260 }
261 
262 void Parser::LexedMethod::ParseLexedMethodDefs() {
263  Self->ParseLexedMethodDef(*this);
264 }
265 
266 void Parser::LateParsedMemberInitializer::ParseLexedMemberInitializers() {
267  Self->ParseLexedMemberInitializer(*this);
268 }
269 
270 /// ParseLexedMethodDeclarations - We finished parsing the member
271 /// specification of a top (non-nested) C++ class. Now go over the
272 /// stack of method declarations with some parts for which parsing was
273 /// delayed (such as default arguments) and parse them.
274 void Parser::ParseLexedMethodDeclarations(ParsingClass &Class) {
275  bool HasTemplateScope = !Class.TopLevelClass && Class.TemplateScope;
276  ParseScope ClassTemplateScope(this, Scope::TemplateParamScope,
277  HasTemplateScope);
278  TemplateParameterDepthRAII CurTemplateDepthTracker(TemplateParameterDepth);
279  if (HasTemplateScope) {
280  Actions.ActOnReenterTemplateScope(getCurScope(), Class.TagOrTemplate);
281  ++CurTemplateDepthTracker;
282  }
283 
284  // The current scope is still active if we're the top-level class.
285  // Otherwise we'll need to push and enter a new scope.
286  bool HasClassScope = !Class.TopLevelClass;
287  ParseScope ClassScope(this, Scope::ClassScope|Scope::DeclScope,
288  HasClassScope);
289  if (HasClassScope)
291  Class.TagOrTemplate);
292 
293  for (size_t i = 0; i < Class.LateParsedDeclarations.size(); ++i) {
294  Class.LateParsedDeclarations[i]->ParseLexedMethodDeclarations();
295  }
296 
297  if (HasClassScope)
299  Class.TagOrTemplate);
300 }
301 
302 void Parser::ParseLexedMethodDeclaration(LateParsedMethodDeclaration &LM) {
303  // If this is a member template, introduce the template parameter scope.
304  ParseScope TemplateScope(this, Scope::TemplateParamScope, LM.TemplateScope);
305  TemplateParameterDepthRAII CurTemplateDepthTracker(TemplateParameterDepth);
306  if (LM.TemplateScope) {
307  Actions.ActOnReenterTemplateScope(getCurScope(), LM.Method);
308  ++CurTemplateDepthTracker;
309  }
310  // Start the delayed C++ method declaration
312 
313  // Introduce the parameters into scope and parse their default
314  // arguments.
315  ParseScope PrototypeScope(this, Scope::FunctionPrototypeScope |
317  for (unsigned I = 0, N = LM.DefaultArgs.size(); I != N; ++I) {
318  auto Param = cast<ParmVarDecl>(LM.DefaultArgs[I].Param);
319  // Introduce the parameter into scope.
320  bool HasUnparsed = Param->hasUnparsedDefaultArg();
322  std::unique_ptr<CachedTokens> Toks = std::move(LM.DefaultArgs[I].Toks);
323  if (Toks) {
324  // Mark the end of the default argument so that we know when to stop when
325  // we parse it later on.
326  Token LastDefaultArgToken = Toks->back();
327  Token DefArgEnd;
328  DefArgEnd.startToken();
329  DefArgEnd.setKind(tok::eof);
330  DefArgEnd.setLocation(LastDefaultArgToken.getEndLoc());
331  DefArgEnd.setEofData(Param);
332  Toks->push_back(DefArgEnd);
333 
334  // Parse the default argument from its saved token stream.
335  Toks->push_back(Tok); // So that the current token doesn't get lost
336  PP.EnterTokenStream(*Toks, true);
337 
338  // Consume the previously-pushed token.
339  ConsumeAnyToken();
340 
341  // Consume the '='.
342  assert(Tok.is(tok::equal) && "Default argument not starting with '='");
343  SourceLocation EqualLoc = ConsumeToken();
344 
345  // The argument isn't actually potentially evaluated unless it is
346  // used.
349  Param);
350 
351  ExprResult DefArgResult;
352  if (getLangOpts().CPlusPlus11 && Tok.is(tok::l_brace)) {
353  Diag(Tok, diag::warn_cxx98_compat_generalized_initializer_lists);
354  DefArgResult = ParseBraceInitializer();
355  } else
356  DefArgResult = ParseAssignmentExpression();
357  DefArgResult = Actions.CorrectDelayedTyposInExpr(DefArgResult);
358  if (DefArgResult.isInvalid()) {
359  Actions.ActOnParamDefaultArgumentError(Param, EqualLoc);
360  } else {
361  if (Tok.isNot(tok::eof) || Tok.getEofData() != Param) {
362  // The last two tokens are the terminator and the saved value of
363  // Tok; the last token in the default argument is the one before
364  // those.
365  assert(Toks->size() >= 3 && "expected a token in default arg");
366  Diag(Tok.getLocation(), diag::err_default_arg_unparsed)
367  << SourceRange(Tok.getLocation(),
368  (*Toks)[Toks->size() - 3].getLocation());
369  }
370  Actions.ActOnParamDefaultArgument(Param, EqualLoc,
371  DefArgResult.get());
372  }
373 
374  // There could be leftover tokens (e.g. because of an error).
375  // Skip through until we reach the 'end of default argument' token.
376  while (Tok.isNot(tok::eof))
377  ConsumeAnyToken();
378 
379  if (Tok.is(tok::eof) && Tok.getEofData() == Param)
380  ConsumeAnyToken();
381  } else if (HasUnparsed) {
382  assert(Param->hasInheritedDefaultArg());
383  FunctionDecl *Old = cast<FunctionDecl>(LM.Method)->getPreviousDecl();
384  ParmVarDecl *OldParam = Old->getParamDecl(I);
385  assert (!OldParam->hasUnparsedDefaultArg());
386  if (OldParam->hasUninstantiatedDefaultArg())
388  OldParam->getUninstantiatedDefaultArg());
389  else
390  Param->setDefaultArg(OldParam->getInit());
391  }
392  }
393 
394  // Parse a delayed exception-specification, if there is one.
395  if (CachedTokens *Toks = LM.ExceptionSpecTokens) {
396  // Add the 'stop' token.
397  Token LastExceptionSpecToken = Toks->back();
398  Token ExceptionSpecEnd;
399  ExceptionSpecEnd.startToken();
400  ExceptionSpecEnd.setKind(tok::eof);
401  ExceptionSpecEnd.setLocation(LastExceptionSpecToken.getEndLoc());
402  ExceptionSpecEnd.setEofData(LM.Method);
403  Toks->push_back(ExceptionSpecEnd);
404 
405  // Parse the default argument from its saved token stream.
406  Toks->push_back(Tok); // So that the current token doesn't get lost
407  PP.EnterTokenStream(*Toks, true);
408 
409  // Consume the previously-pushed token.
410  ConsumeAnyToken();
411 
412  // C++11 [expr.prim.general]p3:
413  // If a declaration declares a member function or member function
414  // template of a class X, the expression this is a prvalue of type
415  // "pointer to cv-qualifier-seq X" between the optional cv-qualifer-seq
416  // and the end of the function-definition, member-declarator, or
417  // declarator.
418  CXXMethodDecl *Method;
419  if (FunctionTemplateDecl *FunTmpl
420  = dyn_cast<FunctionTemplateDecl>(LM.Method))
421  Method = cast<CXXMethodDecl>(FunTmpl->getTemplatedDecl());
422  else
423  Method = cast<CXXMethodDecl>(LM.Method);
424 
425  Sema::CXXThisScopeRAII ThisScope(Actions, Method->getParent(),
426  Method->getTypeQualifiers(),
427  getLangOpts().CPlusPlus11);
428 
429  // Parse the exception-specification.
430  SourceRange SpecificationRange;
431  SmallVector<ParsedType, 4> DynamicExceptions;
432  SmallVector<SourceRange, 4> DynamicExceptionRanges;
433  ExprResult NoexceptExpr;
434  CachedTokens *ExceptionSpecTokens;
435 
437  = tryParseExceptionSpecification(/*Delayed=*/false, SpecificationRange,
438  DynamicExceptions,
439  DynamicExceptionRanges, NoexceptExpr,
440  ExceptionSpecTokens);
441 
442  if (Tok.isNot(tok::eof) || Tok.getEofData() != LM.Method)
443  Diag(Tok.getLocation(), diag::err_except_spec_unparsed);
444 
445  // Attach the exception-specification to the method.
446  Actions.actOnDelayedExceptionSpecification(LM.Method, EST,
447  SpecificationRange,
448  DynamicExceptions,
449  DynamicExceptionRanges,
450  NoexceptExpr.isUsable()?
451  NoexceptExpr.get() : nullptr);
452 
453  // There could be leftover tokens (e.g. because of an error).
454  // Skip through until we reach the original token position.
455  while (Tok.isNot(tok::eof))
456  ConsumeAnyToken();
457 
458  // Clean up the remaining EOF token.
459  if (Tok.is(tok::eof) && Tok.getEofData() == LM.Method)
460  ConsumeAnyToken();
461 
462  delete Toks;
463  LM.ExceptionSpecTokens = nullptr;
464  }
465 
466  PrototypeScope.Exit();
467 
468  // Finish the delayed C++ method declaration.
470 }
471 
472 /// ParseLexedMethodDefs - We finished parsing the member specification of a top
473 /// (non-nested) C++ class. Now go over the stack of lexed methods that were
474 /// collected during its parsing and parse them all.
475 void Parser::ParseLexedMethodDefs(ParsingClass &Class) {
476  bool HasTemplateScope = !Class.TopLevelClass && Class.TemplateScope;
477  ParseScope ClassTemplateScope(this, Scope::TemplateParamScope, HasTemplateScope);
478  TemplateParameterDepthRAII CurTemplateDepthTracker(TemplateParameterDepth);
479  if (HasTemplateScope) {
480  Actions.ActOnReenterTemplateScope(getCurScope(), Class.TagOrTemplate);
481  ++CurTemplateDepthTracker;
482  }
483  bool HasClassScope = !Class.TopLevelClass;
484  ParseScope ClassScope(this, Scope::ClassScope|Scope::DeclScope,
485  HasClassScope);
486 
487  for (size_t i = 0; i < Class.LateParsedDeclarations.size(); ++i) {
488  Class.LateParsedDeclarations[i]->ParseLexedMethodDefs();
489  }
490 }
491 
492 void Parser::ParseLexedMethodDef(LexedMethod &LM) {
493  // If this is a member template, introduce the template parameter scope.
494  ParseScope TemplateScope(this, Scope::TemplateParamScope, LM.TemplateScope);
495  TemplateParameterDepthRAII CurTemplateDepthTracker(TemplateParameterDepth);
496  if (LM.TemplateScope) {
497  Actions.ActOnReenterTemplateScope(getCurScope(), LM.D);
498  ++CurTemplateDepthTracker;
499  }
500 
501  assert(!LM.Toks.empty() && "Empty body!");
502  Token LastBodyToken = LM.Toks.back();
503  Token BodyEnd;
504  BodyEnd.startToken();
505  BodyEnd.setKind(tok::eof);
506  BodyEnd.setLocation(LastBodyToken.getEndLoc());
507  BodyEnd.setEofData(LM.D);
508  LM.Toks.push_back(BodyEnd);
509  // Append the current token at the end of the new token stream so that it
510  // doesn't get lost.
511  LM.Toks.push_back(Tok);
512  PP.EnterTokenStream(LM.Toks, true);
513 
514  // Consume the previously pushed token.
515  ConsumeAnyToken(/*ConsumeCodeCompletionTok=*/true);
516  assert(Tok.isOneOf(tok::l_brace, tok::colon, tok::kw_try)
517  && "Inline method not starting with '{', ':' or 'try'");
518 
519  // Parse the method body. Function body parsing code is similar enough
520  // to be re-used for method bodies as well.
521  ParseScope FnScope(this, Scope::FnScope|Scope::DeclScope);
522  Actions.ActOnStartOfFunctionDef(getCurScope(), LM.D);
523 
524  if (Tok.is(tok::kw_try)) {
525  ParseFunctionTryBlock(LM.D, FnScope);
526 
527  while (Tok.isNot(tok::eof))
528  ConsumeAnyToken();
529 
530  if (Tok.is(tok::eof) && Tok.getEofData() == LM.D)
531  ConsumeAnyToken();
532  return;
533  }
534  if (Tok.is(tok::colon)) {
535  ParseConstructorInitializer(LM.D);
536 
537  // Error recovery.
538  if (!Tok.is(tok::l_brace)) {
539  FnScope.Exit();
540  Actions.ActOnFinishFunctionBody(LM.D, nullptr);
541 
542  while (Tok.isNot(tok::eof))
543  ConsumeAnyToken();
544 
545  if (Tok.is(tok::eof) && Tok.getEofData() == LM.D)
546  ConsumeAnyToken();
547  return;
548  }
549  } else
550  Actions.ActOnDefaultCtorInitializers(LM.D);
551 
552  assert((Actions.getDiagnostics().hasErrorOccurred() ||
553  !isa<FunctionTemplateDecl>(LM.D) ||
554  cast<FunctionTemplateDecl>(LM.D)->getTemplateParameters()->getDepth()
555  < TemplateParameterDepth) &&
556  "TemplateParameterDepth should be greater than the depth of "
557  "current template being instantiated!");
558 
559  ParseFunctionStatementBody(LM.D, FnScope);
560 
561  // Clear the late-template-parsed bit if we set it before.
562  if (LM.D)
563  LM.D->getAsFunction()->setLateTemplateParsed(false);
564 
565  while (Tok.isNot(tok::eof))
566  ConsumeAnyToken();
567 
568  if (Tok.is(tok::eof) && Tok.getEofData() == LM.D)
569  ConsumeAnyToken();
570 
571  if (auto *FD = dyn_cast_or_null<FunctionDecl>(LM.D))
572  if (isa<CXXMethodDecl>(FD) ||
574  Actions.ActOnFinishInlineFunctionDef(FD);
575 }
576 
577 /// ParseLexedMemberInitializers - We finished parsing the member specification
578 /// of a top (non-nested) C++ class. Now go over the stack of lexed data member
579 /// initializers that were collected during its parsing and parse them all.
580 void Parser::ParseLexedMemberInitializers(ParsingClass &Class) {
581  bool HasTemplateScope = !Class.TopLevelClass && Class.TemplateScope;
582  ParseScope ClassTemplateScope(this, Scope::TemplateParamScope,
583  HasTemplateScope);
584  TemplateParameterDepthRAII CurTemplateDepthTracker(TemplateParameterDepth);
585  if (HasTemplateScope) {
586  Actions.ActOnReenterTemplateScope(getCurScope(), Class.TagOrTemplate);
587  ++CurTemplateDepthTracker;
588  }
589  // Set or update the scope flags.
590  bool AlreadyHasClassScope = Class.TopLevelClass;
591  unsigned ScopeFlags = Scope::ClassScope|Scope::DeclScope;
592  ParseScope ClassScope(this, ScopeFlags, !AlreadyHasClassScope);
593  ParseScopeFlags ClassScopeFlags(this, ScopeFlags, AlreadyHasClassScope);
594 
595  if (!AlreadyHasClassScope)
597  Class.TagOrTemplate);
598 
599  if (!Class.LateParsedDeclarations.empty()) {
600  // C++11 [expr.prim.general]p4:
601  // Otherwise, if a member-declarator declares a non-static data member
602  // (9.2) of a class X, the expression this is a prvalue of type "pointer
603  // to X" within the optional brace-or-equal-initializer. It shall not
604  // appear elsewhere in the member-declarator.
605  Sema::CXXThisScopeRAII ThisScope(Actions, Class.TagOrTemplate,
606  /*TypeQuals=*/(unsigned)0);
607 
608  for (size_t i = 0; i < Class.LateParsedDeclarations.size(); ++i) {
609  Class.LateParsedDeclarations[i]->ParseLexedMemberInitializers();
610  }
611  }
612 
613  if (!AlreadyHasClassScope)
615  Class.TagOrTemplate);
616 
617  Actions.ActOnFinishDelayedMemberInitializers(Class.TagOrTemplate);
618 }
619 
620 void Parser::ParseLexedMemberInitializer(LateParsedMemberInitializer &MI) {
621  if (!MI.Field || MI.Field->isInvalidDecl())
622  return;
623 
624  // Append the current token at the end of the new token stream so that it
625  // doesn't get lost.
626  MI.Toks.push_back(Tok);
627  PP.EnterTokenStream(MI.Toks, true);
628 
629  // Consume the previously pushed token.
630  ConsumeAnyToken(/*ConsumeCodeCompletionTok=*/true);
631 
632  SourceLocation EqualLoc;
633 
635 
636  ExprResult Init = ParseCXXMemberInitializer(MI.Field, /*IsFunction=*/false,
637  EqualLoc);
638 
639  Actions.ActOnFinishCXXInClassMemberInitializer(MI.Field, EqualLoc,
640  Init.get());
641 
642  // The next token should be our artificial terminating EOF token.
643  if (Tok.isNot(tok::eof)) {
644  if (!Init.isInvalid()) {
645  SourceLocation EndLoc = PP.getLocForEndOfToken(PrevTokLocation);
646  if (!EndLoc.isValid())
647  EndLoc = Tok.getLocation();
648  // No fixit; we can't recover as if there were a semicolon here.
649  Diag(EndLoc, diag::err_expected_semi_decl_list);
650  }
651 
652  // Consume tokens until we hit the artificial EOF.
653  while (Tok.isNot(tok::eof))
654  ConsumeAnyToken();
655  }
656  // Make sure this is *our* artificial EOF token.
657  if (Tok.getEofData() == MI.Field)
658  ConsumeAnyToken();
659 }
660 
661 /// ConsumeAndStoreUntil - Consume and store the token at the passed token
662 /// container until the token 'T' is reached (which gets
663 /// consumed/stored too, if ConsumeFinalToken).
664 /// If StopAtSemi is true, then we will stop early at a ';' character.
665 /// Returns true if token 'T1' or 'T2' was found.
666 /// NOTE: This is a specialized version of Parser::SkipUntil.
667 bool Parser::ConsumeAndStoreUntil(tok::TokenKind T1, tok::TokenKind T2,
668  CachedTokens &Toks,
669  bool StopAtSemi, bool ConsumeFinalToken) {
670  // We always want this function to consume at least one token if the first
671  // token isn't T and if not at EOF.
672  bool isFirstTokenConsumed = true;
673  while (1) {
674  // If we found one of the tokens, stop and return true.
675  if (Tok.is(T1) || Tok.is(T2)) {
676  if (ConsumeFinalToken) {
677  Toks.push_back(Tok);
678  ConsumeAnyToken();
679  }
680  return true;
681  }
682 
683  switch (Tok.getKind()) {
684  case tok::eof:
685  case tok::annot_module_begin:
686  case tok::annot_module_end:
687  case tok::annot_module_include:
688  // Ran out of tokens.
689  return false;
690 
691  case tok::l_paren:
692  // Recursively consume properly-nested parens.
693  Toks.push_back(Tok);
694  ConsumeParen();
695  ConsumeAndStoreUntil(tok::r_paren, Toks, /*StopAtSemi=*/false);
696  break;
697  case tok::l_square:
698  // Recursively consume properly-nested square brackets.
699  Toks.push_back(Tok);
700  ConsumeBracket();
701  ConsumeAndStoreUntil(tok::r_square, Toks, /*StopAtSemi=*/false);
702  break;
703  case tok::l_brace:
704  // Recursively consume properly-nested braces.
705  Toks.push_back(Tok);
706  ConsumeBrace();
707  ConsumeAndStoreUntil(tok::r_brace, Toks, /*StopAtSemi=*/false);
708  break;
709 
710  // Okay, we found a ']' or '}' or ')', which we think should be balanced.
711  // Since the user wasn't looking for this token (if they were, it would
712  // already be handled), this isn't balanced. If there is a LHS token at a
713  // higher level, we will assume that this matches the unbalanced token
714  // and return it. Otherwise, this is a spurious RHS token, which we skip.
715  case tok::r_paren:
716  if (ParenCount && !isFirstTokenConsumed)
717  return false; // Matches something.
718  Toks.push_back(Tok);
719  ConsumeParen();
720  break;
721  case tok::r_square:
722  if (BracketCount && !isFirstTokenConsumed)
723  return false; // Matches something.
724  Toks.push_back(Tok);
725  ConsumeBracket();
726  break;
727  case tok::r_brace:
728  if (BraceCount && !isFirstTokenConsumed)
729  return false; // Matches something.
730  Toks.push_back(Tok);
731  ConsumeBrace();
732  break;
733 
734  case tok::code_completion:
735  Toks.push_back(Tok);
736  ConsumeCodeCompletionToken();
737  break;
738 
739  case tok::string_literal:
740  case tok::wide_string_literal:
741  case tok::utf8_string_literal:
742  case tok::utf16_string_literal:
743  case tok::utf32_string_literal:
744  Toks.push_back(Tok);
745  ConsumeStringToken();
746  break;
747  case tok::semi:
748  if (StopAtSemi)
749  return false;
750  // FALL THROUGH.
751  default:
752  // consume this token.
753  Toks.push_back(Tok);
754  ConsumeToken();
755  break;
756  }
757  isFirstTokenConsumed = false;
758  }
759 }
760 
761 /// \brief Consume tokens and store them in the passed token container until
762 /// we've passed the try keyword and constructor initializers and have consumed
763 /// the opening brace of the function body. The opening brace will be consumed
764 /// if and only if there was no error.
765 ///
766 /// \return True on error.
767 bool Parser::ConsumeAndStoreFunctionPrologue(CachedTokens &Toks) {
768  if (Tok.is(tok::kw_try)) {
769  Toks.push_back(Tok);
770  ConsumeToken();
771  }
772 
773  if (Tok.isNot(tok::colon)) {
774  // Easy case, just a function body.
775 
776  // Grab any remaining garbage to be diagnosed later. We stop when we reach a
777  // brace: an opening one is the function body, while a closing one probably
778  // means we've reached the end of the class.
779  ConsumeAndStoreUntil(tok::l_brace, tok::r_brace, Toks,
780  /*StopAtSemi=*/true,
781  /*ConsumeFinalToken=*/false);
782  if (Tok.isNot(tok::l_brace))
783  return Diag(Tok.getLocation(), diag::err_expected) << tok::l_brace;
784 
785  Toks.push_back(Tok);
786  ConsumeBrace();
787  return false;
788  }
789 
790  Toks.push_back(Tok);
791  ConsumeToken();
792 
793  // We can't reliably skip over a mem-initializer-id, because it could be
794  // a template-id involving not-yet-declared names. Given:
795  //
796  // S ( ) : a < b < c > ( e )
797  //
798  // 'e' might be an initializer or part of a template argument, depending
799  // on whether 'b' is a template.
800 
801  // Track whether we might be inside a template argument. We can give
802  // significantly better diagnostics if we know that we're not.
803  bool MightBeTemplateArgument = false;
804 
805  while (true) {
806  // Skip over the mem-initializer-id, if possible.
807  if (Tok.is(tok::kw_decltype)) {
808  Toks.push_back(Tok);
809  SourceLocation OpenLoc = ConsumeToken();
810  if (Tok.isNot(tok::l_paren))
811  return Diag(Tok.getLocation(), diag::err_expected_lparen_after)
812  << "decltype";
813  Toks.push_back(Tok);
814  ConsumeParen();
815  if (!ConsumeAndStoreUntil(tok::r_paren, Toks, /*StopAtSemi=*/true)) {
816  Diag(Tok.getLocation(), diag::err_expected) << tok::r_paren;
817  Diag(OpenLoc, diag::note_matching) << tok::l_paren;
818  return true;
819  }
820  }
821  do {
822  // Walk over a component of a nested-name-specifier.
823  if (Tok.is(tok::coloncolon)) {
824  Toks.push_back(Tok);
825  ConsumeToken();
826 
827  if (Tok.is(tok::kw_template)) {
828  Toks.push_back(Tok);
829  ConsumeToken();
830  }
831  }
832 
833  if (Tok.is(tok::identifier)) {
834  Toks.push_back(Tok);
835  ConsumeToken();
836  } else {
837  break;
838  }
839  } while (Tok.is(tok::coloncolon));
840 
841  if (Tok.is(tok::code_completion)) {
842  Toks.push_back(Tok);
843  ConsumeCodeCompletionToken();
844  if (Tok.isOneOf(tok::identifier, tok::coloncolon, tok::kw_decltype)) {
845  // Could be the start of another member initializer (the ',' has not
846  // been written yet)
847  continue;
848  }
849  }
850 
851  if (Tok.is(tok::comma)) {
852  // The initialization is missing, we'll diagnose it later.
853  Toks.push_back(Tok);
854  ConsumeToken();
855  continue;
856  }
857  if (Tok.is(tok::less))
858  MightBeTemplateArgument = true;
859 
860  if (MightBeTemplateArgument) {
861  // We may be inside a template argument list. Grab up to the start of the
862  // next parenthesized initializer or braced-init-list. This *might* be the
863  // initializer, or it might be a subexpression in the template argument
864  // list.
865  // FIXME: Count angle brackets, and clear MightBeTemplateArgument
866  // if all angles are closed.
867  if (!ConsumeAndStoreUntil(tok::l_paren, tok::l_brace, Toks,
868  /*StopAtSemi=*/true,
869  /*ConsumeFinalToken=*/false)) {
870  // We're not just missing the initializer, we're also missing the
871  // function body!
872  return Diag(Tok.getLocation(), diag::err_expected) << tok::l_brace;
873  }
874  } else if (Tok.isNot(tok::l_paren) && Tok.isNot(tok::l_brace)) {
875  // We found something weird in a mem-initializer-id.
876  if (getLangOpts().CPlusPlus11)
877  return Diag(Tok.getLocation(), diag::err_expected_either)
878  << tok::l_paren << tok::l_brace;
879  else
880  return Diag(Tok.getLocation(), diag::err_expected) << tok::l_paren;
881  }
882 
883  tok::TokenKind kind = Tok.getKind();
884  Toks.push_back(Tok);
885  bool IsLParen = (kind == tok::l_paren);
886  SourceLocation OpenLoc = Tok.getLocation();
887 
888  if (IsLParen) {
889  ConsumeParen();
890  } else {
891  assert(kind == tok::l_brace && "Must be left paren or brace here.");
892  ConsumeBrace();
893  // In C++03, this has to be the start of the function body, which
894  // means the initializer is malformed; we'll diagnose it later.
895  if (!getLangOpts().CPlusPlus11)
896  return false;
897 
898  const Token &PreviousToken = Toks[Toks.size() - 2];
899  if (!MightBeTemplateArgument &&
900  !PreviousToken.isOneOf(tok::identifier, tok::greater,
901  tok::greatergreater)) {
902  // If the opening brace is not preceded by one of these tokens, we are
903  // missing the mem-initializer-id. In order to recover better, we need
904  // to use heuristics to determine if this '{' is most likely the
905  // begining of a brace-init-list or the function body.
906  // Check the token after the corresponding '}'.
907  TentativeParsingAction PA(*this);
908  if (SkipUntil(tok::r_brace) &&
909  !Tok.isOneOf(tok::comma, tok::ellipsis, tok::l_brace)) {
910  // Consider there was a malformed initializer and this is the start
911  // of the function body. We'll diagnose it later.
912  PA.Revert();
913  return false;
914  }
915  PA.Revert();
916  }
917  }
918 
919  // Grab the initializer (or the subexpression of the template argument).
920  // FIXME: If we support lambdas here, we'll need to set StopAtSemi to false
921  // if we might be inside the braces of a lambda-expression.
922  tok::TokenKind CloseKind = IsLParen ? tok::r_paren : tok::r_brace;
923  if (!ConsumeAndStoreUntil(CloseKind, Toks, /*StopAtSemi=*/true)) {
924  Diag(Tok, diag::err_expected) << CloseKind;
925  Diag(OpenLoc, diag::note_matching) << kind;
926  return true;
927  }
928 
929  // Grab pack ellipsis, if present.
930  if (Tok.is(tok::ellipsis)) {
931  Toks.push_back(Tok);
932  ConsumeToken();
933  }
934 
935  // If we know we just consumed a mem-initializer, we must have ',' or '{'
936  // next.
937  if (Tok.is(tok::comma)) {
938  Toks.push_back(Tok);
939  ConsumeToken();
940  } else if (Tok.is(tok::l_brace)) {
941  // This is the function body if the ')' or '}' is immediately followed by
942  // a '{'. That cannot happen within a template argument, apart from the
943  // case where a template argument contains a compound literal:
944  //
945  // S ( ) : a < b < c > ( d ) { }
946  // // End of declaration, or still inside the template argument?
947  //
948  // ... and the case where the template argument contains a lambda:
949  //
950  // S ( ) : a < 0 && b < c > ( d ) + [ ] ( ) { return 0; }
951  // ( ) > ( ) { }
952  //
953  // FIXME: Disambiguate these cases. Note that the latter case is probably
954  // going to be made ill-formed by core issue 1607.
955  Toks.push_back(Tok);
956  ConsumeBrace();
957  return false;
958  } else if (!MightBeTemplateArgument) {
959  return Diag(Tok.getLocation(), diag::err_expected_either) << tok::l_brace
960  << tok::comma;
961  }
962  }
963 }
964 
965 /// \brief Consume and store tokens from the '?' to the ':' in a conditional
966 /// expression.
967 bool Parser::ConsumeAndStoreConditional(CachedTokens &Toks) {
968  // Consume '?'.
969  assert(Tok.is(tok::question));
970  Toks.push_back(Tok);
971  ConsumeToken();
972 
973  while (Tok.isNot(tok::colon)) {
974  if (!ConsumeAndStoreUntil(tok::question, tok::colon, Toks,
975  /*StopAtSemi=*/true,
976  /*ConsumeFinalToken=*/false))
977  return false;
978 
979  // If we found a nested conditional, consume it.
980  if (Tok.is(tok::question) && !ConsumeAndStoreConditional(Toks))
981  return false;
982  }
983 
984  // Consume ':'.
985  Toks.push_back(Tok);
986  ConsumeToken();
987  return true;
988 }
989 
990 /// \brief A tentative parsing action that can also revert token annotations.
991 class Parser::UnannotatedTentativeParsingAction : public TentativeParsingAction {
992 public:
994  tok::TokenKind EndKind)
995  : TentativeParsingAction(Self), Self(Self), EndKind(EndKind) {
996  // Stash away the old token stream, so we can restore it once the
997  // tentative parse is complete.
998  TentativeParsingAction Inner(Self);
999  Self.ConsumeAndStoreUntil(EndKind, Toks, true, /*ConsumeFinalToken*/false);
1000  Inner.Revert();
1001  }
1002 
1004  Revert();
1005 
1006  // Put back the original tokens.
1007  Self.SkipUntil(EndKind, StopAtSemi | StopBeforeMatch);
1008  if (Toks.size()) {
1009  auto Buffer = llvm::make_unique<Token[]>(Toks.size());
1010  std::copy(Toks.begin() + 1, Toks.end(), Buffer.get());
1011  Buffer[Toks.size() - 1] = Self.Tok;
1012  Self.PP.EnterTokenStream(std::move(Buffer), Toks.size(), true);
1013 
1014  Self.Tok = Toks.front();
1015  }
1016  }
1017 
1018 private:
1019  Parser &Self;
1020  CachedTokens Toks;
1021  tok::TokenKind EndKind;
1022 };
1023 
1024 /// ConsumeAndStoreInitializer - Consume and store the token at the passed token
1025 /// container until the end of the current initializer expression (either a
1026 /// default argument or an in-class initializer for a non-static data member).
1027 ///
1028 /// Returns \c true if we reached the end of something initializer-shaped,
1029 /// \c false if we bailed out.
1030 bool Parser::ConsumeAndStoreInitializer(CachedTokens &Toks,
1031  CachedInitKind CIK) {
1032  // We always want this function to consume at least one token if not at EOF.
1033  bool IsFirstToken = true;
1034 
1035  // Number of possible unclosed <s we've seen so far. These might be templates,
1036  // and might not, but if there were none of them (or we know for sure that
1037  // we're within a template), we can avoid a tentative parse.
1038  unsigned AngleCount = 0;
1039  unsigned KnownTemplateCount = 0;
1040 
1041  while (1) {
1042  switch (Tok.getKind()) {
1043  case tok::comma:
1044  // If we might be in a template, perform a tentative parse to check.
1045  if (!AngleCount)
1046  // Not a template argument: this is the end of the initializer.
1047  return true;
1048  if (KnownTemplateCount)
1049  goto consume_token;
1050 
1051  // We hit a comma inside angle brackets. This is the hard case. The
1052  // rule we follow is:
1053  // * For a default argument, if the tokens after the comma form a
1054  // syntactically-valid parameter-declaration-clause, in which each
1055  // parameter has an initializer, then this comma ends the default
1056  // argument.
1057  // * For a default initializer, if the tokens after the comma form a
1058  // syntactically-valid init-declarator-list, then this comma ends
1059  // the default initializer.
1060  {
1062  CIK == CIK_DefaultInitializer
1063  ? tok::semi : tok::r_paren);
1065 
1066  TPResult Result = TPResult::Error;
1067  ConsumeToken();
1068  switch (CIK) {
1069  case CIK_DefaultInitializer:
1070  Result = TryParseInitDeclaratorList();
1071  // If we parsed a complete, ambiguous init-declarator-list, this
1072  // is only syntactically-valid if it's followed by a semicolon.
1073  if (Result == TPResult::Ambiguous && Tok.isNot(tok::semi))
1074  Result = TPResult::False;
1075  break;
1076 
1077  case CIK_DefaultArgument:
1078  bool InvalidAsDeclaration = false;
1079  Result = TryParseParameterDeclarationClause(
1080  &InvalidAsDeclaration, /*VersusTemplateArgument=*/true);
1081  // If this is an expression or a declaration with a missing
1082  // 'typename', assume it's not a declaration.
1083  if (Result == TPResult::Ambiguous && InvalidAsDeclaration)
1084  Result = TPResult::False;
1085  break;
1086  }
1087 
1088  // If what follows could be a declaration, it is a declaration.
1089  if (Result != TPResult::False && Result != TPResult::Error) {
1090  PA.Revert();
1091  return true;
1092  }
1093 
1094  // In the uncommon case that we decide the following tokens are part
1095  // of a template argument, revert any annotations we've performed in
1096  // those tokens. We're not going to look them up until we've parsed
1097  // the rest of the class, and that might add more declarations.
1098  PA.RevertAnnotations();
1099  }
1100 
1101  // Keep going. We know we're inside a template argument list now.
1102  ++KnownTemplateCount;
1103  goto consume_token;
1104 
1105  case tok::eof:
1106  case tok::annot_module_begin:
1107  case tok::annot_module_end:
1108  case tok::annot_module_include:
1109  // Ran out of tokens.
1110  return false;
1111 
1112  case tok::less:
1113  // FIXME: A '<' can only start a template-id if it's preceded by an
1114  // identifier, an operator-function-id, or a literal-operator-id.
1115  ++AngleCount;
1116  goto consume_token;
1117 
1118  case tok::question:
1119  // In 'a ? b : c', 'b' can contain an unparenthesized comma. If it does,
1120  // that is *never* the end of the initializer. Skip to the ':'.
1121  if (!ConsumeAndStoreConditional(Toks))
1122  return false;
1123  break;
1124 
1125  case tok::greatergreatergreater:
1126  if (!getLangOpts().CPlusPlus11)
1127  goto consume_token;
1128  if (AngleCount) --AngleCount;
1129  if (KnownTemplateCount) --KnownTemplateCount;
1130  // Fall through.
1131  case tok::greatergreater:
1132  if (!getLangOpts().CPlusPlus11)
1133  goto consume_token;
1134  if (AngleCount) --AngleCount;
1135  if (KnownTemplateCount) --KnownTemplateCount;
1136  // Fall through.
1137  case tok::greater:
1138  if (AngleCount) --AngleCount;
1139  if (KnownTemplateCount) --KnownTemplateCount;
1140  goto consume_token;
1141 
1142  case tok::kw_template:
1143  // 'template' identifier '<' is known to start a template argument list,
1144  // and can be used to disambiguate the parse.
1145  // FIXME: Support all forms of 'template' unqualified-id '<'.
1146  Toks.push_back(Tok);
1147  ConsumeToken();
1148  if (Tok.is(tok::identifier)) {
1149  Toks.push_back(Tok);
1150  ConsumeToken();
1151  if (Tok.is(tok::less)) {
1152  ++AngleCount;
1153  ++KnownTemplateCount;
1154  Toks.push_back(Tok);
1155  ConsumeToken();
1156  }
1157  }
1158  break;
1159 
1160  case tok::kw_operator:
1161  // If 'operator' precedes other punctuation, that punctuation loses
1162  // its special behavior.
1163  Toks.push_back(Tok);
1164  ConsumeToken();
1165  switch (Tok.getKind()) {
1166  case tok::comma:
1167  case tok::greatergreatergreater:
1168  case tok::greatergreater:
1169  case tok::greater:
1170  case tok::less:
1171  Toks.push_back(Tok);
1172  ConsumeToken();
1173  break;
1174  default:
1175  break;
1176  }
1177  break;
1178 
1179  case tok::l_paren:
1180  // Recursively consume properly-nested parens.
1181  Toks.push_back(Tok);
1182  ConsumeParen();
1183  ConsumeAndStoreUntil(tok::r_paren, Toks, /*StopAtSemi=*/false);
1184  break;
1185  case tok::l_square:
1186  // Recursively consume properly-nested square brackets.
1187  Toks.push_back(Tok);
1188  ConsumeBracket();
1189  ConsumeAndStoreUntil(tok::r_square, Toks, /*StopAtSemi=*/false);
1190  break;
1191  case tok::l_brace:
1192  // Recursively consume properly-nested braces.
1193  Toks.push_back(Tok);
1194  ConsumeBrace();
1195  ConsumeAndStoreUntil(tok::r_brace, Toks, /*StopAtSemi=*/false);
1196  break;
1197 
1198  // Okay, we found a ']' or '}' or ')', which we think should be balanced.
1199  // Since the user wasn't looking for this token (if they were, it would
1200  // already be handled), this isn't balanced. If there is a LHS token at a
1201  // higher level, we will assume that this matches the unbalanced token
1202  // and return it. Otherwise, this is a spurious RHS token, which we
1203  // consume and pass on to downstream code to diagnose.
1204  case tok::r_paren:
1205  if (CIK == CIK_DefaultArgument)
1206  return true; // End of the default argument.
1207  if (ParenCount && !IsFirstToken)
1208  return false;
1209  Toks.push_back(Tok);
1210  ConsumeParen();
1211  continue;
1212  case tok::r_square:
1213  if (BracketCount && !IsFirstToken)
1214  return false;
1215  Toks.push_back(Tok);
1216  ConsumeBracket();
1217  continue;
1218  case tok::r_brace:
1219  if (BraceCount && !IsFirstToken)
1220  return false;
1221  Toks.push_back(Tok);
1222  ConsumeBrace();
1223  continue;
1224 
1225  case tok::code_completion:
1226  Toks.push_back(Tok);
1227  ConsumeCodeCompletionToken();
1228  break;
1229 
1230  case tok::string_literal:
1231  case tok::wide_string_literal:
1232  case tok::utf8_string_literal:
1233  case tok::utf16_string_literal:
1234  case tok::utf32_string_literal:
1235  Toks.push_back(Tok);
1236  ConsumeStringToken();
1237  break;
1238  case tok::semi:
1239  if (CIK == CIK_DefaultInitializer)
1240  return true; // End of the default initializer.
1241  // FALL THROUGH.
1242  default:
1243  consume_token:
1244  Toks.push_back(Tok);
1245  ConsumeToken();
1246  break;
1247  }
1248  IsFirstToken = false;
1249  }
1250 }
void ActOnFinishDelayedMemberInitializers(Decl *Record)
FunctionDecl - An instance of this class is created to represent a function declaration or definition...
Definition: Decl.h:1586
SourceLocation getLocWithOffset(int Offset) const
Return a source location with the specified offset from this SourceLocation.
This is a scope that corresponds to the parameters within a function prototype.
Definition: Scope.h:80
bool is(tok::TokenKind K) const
is/isNot - Predicates to check if this token is a specific kind, as in "if (Tok.is(tok::l_brace)) {...
Definition: Token.h:94
void ActOnStartDelayedCXXMethodDeclaration(Scope *S, Decl *Method)
ActOnStartDelayedCXXMethodDeclaration - We have completed parsing a top-level (non-nested) C++ class...
Decl - This represents one declaration (or definition), e.g.
Definition: DeclBase.h:80
Defines the C++ template declaration subclasses.
StringRef P
bool isTemplateParamScope() const
isTemplateParamScope - Return true if this scope is a C++ template parameter scope.
Definition: Scope.h:365
This indicates that the scope corresponds to a function, which means that labels are set here...
Definition: Scope.h:46
void ActOnFinishDelayedCXXMethodDeclaration(Scope *S, Decl *Method)
ActOnFinishDelayedCXXMethodDeclaration - We have finished processing the delayed method declaration f...
bool isFunctionDeclarator(unsigned &idx) const
isFunctionDeclarator - This method returns true if the declarator is a function declarator (looking t...
Definition: DeclSpec.h:2236
AccessSpecifier
A C++ access specifier (public, private, protected), plus the special value "none" which means differ...
Definition: Specifiers.h:93
Parser - This implements a parser for the C family of languages.
Definition: Parse/Parser.h:57
void ActOnDefaultCtorInitializers(Decl *CDtorDecl)
RAII object that enters a new expression evaluation context.
Definition: Sema.h:10281
void ActOnStartDelayedMemberDeclarations(Scope *S, Decl *Record)
RAII object used to temporarily allow the C++ &#39;this&#39; expression to be used, with the given qualifiers...
Definition: Sema.h:4844
bool canSkipFunctionBody(Decl *D)
Determine whether we can skip parsing the body of a function definition, assuming we don&#39;t care about...
Definition: SemaDecl.cpp:11961
ParmVarDecl - Represents a parameter to a function.
Definition: Decl.h:1402
void MarkAsLateParsedTemplate(FunctionDecl *FD, Decl *FnD, CachedTokens &Toks)
tok::TokenKind getKind() const
Definition: Token.h:89
bool SkipUntil(tok::TokenKind T, SkipUntilFlags Flags=static_cast< SkipUntilFlags >(0))
SkipUntil - Read tokens until we get to the specified token, then consume it (unless StopBeforeMatch ...
Definition: Parse/Parser.h:898
Decl * ActOnStartOfFunctionDef(Scope *S, Declarator &D, MultiTemplateParamsArg TemplateParamLists, SkipBodyInfo *SkipBody=nullptr)
Definition: SemaDecl.cpp:11618
SourceLocation getLocForEndOfToken(SourceLocation Loc, unsigned Offset=0)
Computes the source location just past the end of the token at this source location.
bool TryConsumeToken(tok::TokenKind Expected)
Definition: Parse/Parser.h:312
void setUninstantiatedDefaultArg(Expr *arg)
Definition: Decl.cpp:2453
This declaration is a friend function.
Definition: DeclBase.h:146
Token - This structure provides full information about a lexed token.
Definition: Token.h:35
bool isInIdentifierNamespace(unsigned NS) const
Definition: DeclBase.h:704
void setKind(tok::TokenKind K)
Definition: Token.h:90
The current expression is potentially evaluated, but any declarations referenced inside that expressi...
Definition: Sema.h:845
PtrTy get() const
Definition: Ownership.h:163
RAII class used to indicate that we are performing provisional semantic analysis to determine the val...
Definition: Sema.h:7249
ExprResult CorrectDelayedTyposInExpr(Expr *E, VarDecl *InitDecl=nullptr, llvm::function_ref< ExprResult(Expr *)> Filter=[](Expr *E) -> ExprResult { return E;})
Process any TypoExprs in the given Expr and its children, generating diagnostics as appropriate and r...
const ParsingDeclSpec & getDeclSpec() const
Scope - A scope is a transient data structure that is used while parsing the program.
Definition: Scope.h:39
bool hasUnparsedDefaultArg() const
hasUnparsedDefaultArg - Determines whether this parameter has a default argument that has not yet bee...
Definition: Decl.h:1513
Decl * ActOnFinishFunctionBody(Decl *Decl, Stmt *Body)
Definition: SemaDecl.cpp:11981
void ProcessDeclAttributeList(Scope *S, Decl *D, const AttributeList *AL, bool IncludeCXX11Attributes=true)
ProcessDeclAttributeList - Apply all the decl attributes in the specified attribute list to the speci...
DiagnosticsEngine & getDiagnostics() const
Definition: Sema.h:1092
A class for parsing a declarator.
UnannotatedTentativeParsingAction(Parser &Self, tok::TokenKind EndKind)
This file defines the classes used to store parsed information about declaration-specifiers and decla...
void SkipMalformedDecl()
SkipMalformedDecl - Read tokens until we get to some likely good stopping point for skipping past a s...
Definition: ParseDecl.cpp:1672
void setEofData(const void *D)
Definition: Token.h:193
SourceLocation getLocation() const
Return a source location identifier for the specified offset in the current file. ...
Definition: Token.h:123
bool isConstexprSpecified() const
Definition: DeclSpec.h:708
void ActOnFinishCXXInClassMemberInitializer(Decl *VarDecl, SourceLocation EqualLoc, Expr *Init)
This is invoked after parsing an in-class initializer for a non-static C++ class member, and after instantiating an in-class initializer in a class template.
void ActOnDelayedCXXMethodParameter(Scope *S, Decl *Param)
ActOnDelayedCXXMethodParameter - We&#39;ve already started a delayed C++ method declaration.
void setLateTemplateParsed(bool ILT=true)
Definition: Decl.h:1869
void SetDeclDeleted(Decl *dcl, SourceLocation DelLoc)
bool isInvalid() const
Definition: Ownership.h:159
bool isDependentContext() const
Determines whether this context is dependent on a template parameter.
Definition: DeclBase.cpp:956
bool isFriendSpecified() const
Definition: DeclSpec.h:702
bool isUsable() const
Definition: Ownership.h:160
The result type of a method or function.
const LangOptions & getLangOpts() const
Definition: Parse/Parser.h:260
This is a scope that corresponds to the parameters within a function prototype for a function declara...
Definition: Scope.h:86
void CheckForFunctionRedefinition(FunctionDecl *FD, const FunctionDecl *EffectiveDefinition=nullptr, SkipBodyInfo *SkipBody=nullptr)
Definition: SemaDecl.cpp:11690
Decl * ActOnSkippedFunctionBody(Decl *Decl)
Definition: SemaDecl.cpp:11973
void ActOnStartCXXInClassMemberInitializer()
Enter a new C++ default initializer scope.
Stop skipping at semicolon.
Definition: Parse/Parser.h:878
ActionResult - This structure is used while parsing/acting on expressions, stmts, etc...
Definition: Ownership.h:145
FunctionDecl * getAsFunction() LLVM_READONLY
Returns the function itself, or the templated function if this is a function template.
Definition: DeclBase.cpp:197
Encodes a location in the source.
void ActOnFinishDelayedMemberDeclarations(Scope *S, Decl *Record)
FunctionDefinitionKind getFunctionDefinitionKind() const
Definition: DeclSpec.h:2426
Represents a static or instance method of a struct/union/class.
Definition: DeclCXX.h:1811
void SetDeclDefaulted(Decl *dcl, SourceLocation DefaultLoc)
A tentative parsing action that can also revert token annotations.
const void * getEofData() const
Definition: Token.h:189
void actOnDelayedExceptionSpecification(Decl *Method, ExceptionSpecificationType EST, SourceRange SpecificationRange, ArrayRef< ParsedType > DynamicExceptions, ArrayRef< SourceRange > DynamicExceptionRanges, Expr *NoexceptExpr)
Add an exception-specification to the given member function (or member function template).
TokenKind
Provides a simple uniform namespace for tokens from all C languages.
Definition: TokenKinds.h:25
Represents a C++11 virt-specifier-seq.
Definition: DeclSpec.h:2457
bool hasUninstantiatedDefaultArg() const
Definition: Decl.h:1517
Scope * getCurScope() const
Definition: Parse/Parser.h:267
void ActOnFinishInlineFunctionDef(FunctionDecl *D)
Definition: SemaDecl.cpp:11630
The scope of a struct/union/class definition.
Definition: Scope.h:64
bool isNot(tok::TokenKind K) const
Definition: Token.h:95
/file This file defines classes for searching and anlyzing source code clones.
bool isValid() const
Return true if this is a valid SourceLocation object.
void ActOnParamDefaultArgument(Decl *param, SourceLocation EqualLoc, Expr *defarg)
ActOnParamDefaultArgument - Check whether the default argument provided for a function parameter is w...
const Expr * getInit() const
Definition: Decl.h:1144
This is a scope that corresponds to the template parameters of a C++ template.
Definition: Scope.h:76
bool isOneOf(tok::TokenKind K1, tok::TokenKind K2) const
Definition: Token.h:96
Expr * getUninstantiatedDefaultArg()
Definition: Decl.cpp:2458
DiagnosticBuilder Diag(SourceLocation Loc, unsigned DiagID)
NamedDecl * ActOnCXXMemberDeclarator(Scope *S, AccessSpecifier AS, Declarator &D, MultiTemplateParamsArg TemplateParameterLists, Expr *BitfieldWidth, const VirtSpecifiers &VS, InClassInitStyle InitStyle)
ActOnCXXMemberDeclarator - This is invoked when a C++ class member declarator is parsed.
ExprResult ParseAssignmentExpression(TypeCastState isTypeCast=NotTypeCast)
Parse an expr that doesn&#39;t include (top-level) commas.
Definition: ParseExpr.cpp:156
ExceptionSpecificationType
The various types of exception specifications that exist in C++11.
This is a scope that can contain a declaration.
Definition: Scope.h:58
void ActOnParamDefaultArgumentError(Decl *param, SourceLocation EqualLoc)
ActOnParamDefaultArgumentError - Parsing or semantic analysis of the default argument for the paramet...
SourceLocation ConsumeToken()
ConsumeToken - Consume the current &#39;peek token&#39; and lex the next one.
Definition: Parse/Parser.h:304
void ActOnPureSpecifier(Decl *D, SourceLocation PureSpecLoc)
DeclContext * CurContext
CurContext - This is the current declaration context of parsing.
Definition: Sema.h:315
unsigned kind
All of the diagnostics that can be emitted by the frontend.
Definition: DiagnosticIDs.h:43
void setLocation(SourceLocation L)
Definition: Token.h:131
A trivial tuple used to represent a source range.
NamedDecl - This represents a decl with a name.
Definition: Decl.h:213
No in-class initializer.
Definition: Specifiers.h:225
Declaration of a template function.
Definition: DeclTemplate.h:939
bool IsInsideALocalClassWithinATemplateFunction()
void startToken()
Reset all flags to cleared.
Definition: Token.h:168
AttributeList - Represents a syntactic attribute.
Definition: AttributeList.h:94
Stop skipping at specified token, but don&#39;t skip the token itself.
Definition: Parse/Parser.h:880
NamedDecl * ActOnFriendFunctionDecl(Scope *S, Declarator &D, MultiTemplateParamsArg TemplateParams)
unsigned ActOnReenterTemplateScope(Scope *S, Decl *Template)
SourceLocation getEndLoc() const
Definition: Token.h:150