File: | tools/clang/lib/Parse/ParseExprCXX.cpp |
Warning: | line 1802, column 5 Called C++ object pointer is null |
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1 | //===--- ParseExprCXX.cpp - C++ Expression 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 the Expression parsing implementation for C++. | |||
11 | // | |||
12 | //===----------------------------------------------------------------------===// | |||
13 | #include "clang/Parse/Parser.h" | |||
14 | #include "clang/AST/ASTContext.h" | |||
15 | #include "clang/AST/DeclTemplate.h" | |||
16 | #include "clang/Basic/PrettyStackTrace.h" | |||
17 | #include "clang/Lex/LiteralSupport.h" | |||
18 | #include "clang/Parse/ParseDiagnostic.h" | |||
19 | #include "clang/Parse/RAIIObjectsForParser.h" | |||
20 | #include "clang/Sema/DeclSpec.h" | |||
21 | #include "clang/Sema/ParsedTemplate.h" | |||
22 | #include "clang/Sema/Scope.h" | |||
23 | #include "llvm/Support/ErrorHandling.h" | |||
24 | ||||
25 | ||||
26 | using namespace clang; | |||
27 | ||||
28 | static int SelectDigraphErrorMessage(tok::TokenKind Kind) { | |||
29 | switch (Kind) { | |||
30 | // template name | |||
31 | case tok::unknown: return 0; | |||
32 | // casts | |||
33 | case tok::kw_const_cast: return 1; | |||
34 | case tok::kw_dynamic_cast: return 2; | |||
35 | case tok::kw_reinterpret_cast: return 3; | |||
36 | case tok::kw_static_cast: return 4; | |||
37 | default: | |||
38 | llvm_unreachable("Unknown type for digraph error message.")::llvm::llvm_unreachable_internal("Unknown type for digraph error message." , "/build/llvm-toolchain-snapshot-8~svn345461/tools/clang/lib/Parse/ParseExprCXX.cpp" , 38); | |||
39 | } | |||
40 | } | |||
41 | ||||
42 | // Are the two tokens adjacent in the same source file? | |||
43 | bool Parser::areTokensAdjacent(const Token &First, const Token &Second) { | |||
44 | SourceManager &SM = PP.getSourceManager(); | |||
45 | SourceLocation FirstLoc = SM.getSpellingLoc(First.getLocation()); | |||
46 | SourceLocation FirstEnd = FirstLoc.getLocWithOffset(First.getLength()); | |||
47 | return FirstEnd == SM.getSpellingLoc(Second.getLocation()); | |||
48 | } | |||
49 | ||||
50 | // Suggest fixit for "<::" after a cast. | |||
51 | static void FixDigraph(Parser &P, Preprocessor &PP, Token &DigraphToken, | |||
52 | Token &ColonToken, tok::TokenKind Kind, bool AtDigraph) { | |||
53 | // Pull '<:' and ':' off token stream. | |||
54 | if (!AtDigraph) | |||
55 | PP.Lex(DigraphToken); | |||
56 | PP.Lex(ColonToken); | |||
57 | ||||
58 | SourceRange Range; | |||
59 | Range.setBegin(DigraphToken.getLocation()); | |||
60 | Range.setEnd(ColonToken.getLocation()); | |||
61 | P.Diag(DigraphToken.getLocation(), diag::err_missing_whitespace_digraph) | |||
62 | << SelectDigraphErrorMessage(Kind) | |||
63 | << FixItHint::CreateReplacement(Range, "< ::"); | |||
64 | ||||
65 | // Update token information to reflect their change in token type. | |||
66 | ColonToken.setKind(tok::coloncolon); | |||
67 | ColonToken.setLocation(ColonToken.getLocation().getLocWithOffset(-1)); | |||
68 | ColonToken.setLength(2); | |||
69 | DigraphToken.setKind(tok::less); | |||
70 | DigraphToken.setLength(1); | |||
71 | ||||
72 | // Push new tokens back to token stream. | |||
73 | PP.EnterToken(ColonToken); | |||
74 | if (!AtDigraph) | |||
75 | PP.EnterToken(DigraphToken); | |||
76 | } | |||
77 | ||||
78 | // Check for '<::' which should be '< ::' instead of '[:' when following | |||
79 | // a template name. | |||
80 | void Parser::CheckForTemplateAndDigraph(Token &Next, ParsedType ObjectType, | |||
81 | bool EnteringContext, | |||
82 | IdentifierInfo &II, CXXScopeSpec &SS) { | |||
83 | if (!Next.is(tok::l_square) || Next.getLength() != 2) | |||
84 | return; | |||
85 | ||||
86 | Token SecondToken = GetLookAheadToken(2); | |||
87 | if (!SecondToken.is(tok::colon) || !areTokensAdjacent(Next, SecondToken)) | |||
88 | return; | |||
89 | ||||
90 | TemplateTy Template; | |||
91 | UnqualifiedId TemplateName; | |||
92 | TemplateName.setIdentifier(&II, Tok.getLocation()); | |||
93 | bool MemberOfUnknownSpecialization; | |||
94 | if (!Actions.isTemplateName(getCurScope(), SS, /*hasTemplateKeyword=*/false, | |||
95 | TemplateName, ObjectType, EnteringContext, | |||
96 | Template, MemberOfUnknownSpecialization)) | |||
97 | return; | |||
98 | ||||
99 | FixDigraph(*this, PP, Next, SecondToken, tok::unknown, | |||
100 | /*AtDigraph*/false); | |||
101 | } | |||
102 | ||||
103 | /// Parse global scope or nested-name-specifier if present. | |||
104 | /// | |||
105 | /// Parses a C++ global scope specifier ('::') or nested-name-specifier (which | |||
106 | /// may be preceded by '::'). Note that this routine will not parse ::new or | |||
107 | /// ::delete; it will just leave them in the token stream. | |||
108 | /// | |||
109 | /// '::'[opt] nested-name-specifier | |||
110 | /// '::' | |||
111 | /// | |||
112 | /// nested-name-specifier: | |||
113 | /// type-name '::' | |||
114 | /// namespace-name '::' | |||
115 | /// nested-name-specifier identifier '::' | |||
116 | /// nested-name-specifier 'template'[opt] simple-template-id '::' | |||
117 | /// | |||
118 | /// | |||
119 | /// \param SS the scope specifier that will be set to the parsed | |||
120 | /// nested-name-specifier (or empty) | |||
121 | /// | |||
122 | /// \param ObjectType if this nested-name-specifier is being parsed following | |||
123 | /// the "." or "->" of a member access expression, this parameter provides the | |||
124 | /// type of the object whose members are being accessed. | |||
125 | /// | |||
126 | /// \param EnteringContext whether we will be entering into the context of | |||
127 | /// the nested-name-specifier after parsing it. | |||
128 | /// | |||
129 | /// \param MayBePseudoDestructor When non-NULL, points to a flag that | |||
130 | /// indicates whether this nested-name-specifier may be part of a | |||
131 | /// pseudo-destructor name. In this case, the flag will be set false | |||
132 | /// if we don't actually end up parsing a destructor name. Moreorover, | |||
133 | /// if we do end up determining that we are parsing a destructor name, | |||
134 | /// the last component of the nested-name-specifier is not parsed as | |||
135 | /// part of the scope specifier. | |||
136 | /// | |||
137 | /// \param IsTypename If \c true, this nested-name-specifier is known to be | |||
138 | /// part of a type name. This is used to improve error recovery. | |||
139 | /// | |||
140 | /// \param LastII When non-NULL, points to an IdentifierInfo* that will be | |||
141 | /// filled in with the leading identifier in the last component of the | |||
142 | /// nested-name-specifier, if any. | |||
143 | /// | |||
144 | /// \param OnlyNamespace If true, only considers namespaces in lookup. | |||
145 | /// | |||
146 | /// \returns true if there was an error parsing a scope specifier | |||
147 | bool Parser::ParseOptionalCXXScopeSpecifier(CXXScopeSpec &SS, | |||
148 | ParsedType ObjectType, | |||
149 | bool EnteringContext, | |||
150 | bool *MayBePseudoDestructor, | |||
151 | bool IsTypename, | |||
152 | IdentifierInfo **LastII, | |||
153 | bool OnlyNamespace) { | |||
154 | assert(getLangOpts().CPlusPlus &&((getLangOpts().CPlusPlus && "Call sites of this function should be guarded by checking for C++" ) ? static_cast<void> (0) : __assert_fail ("getLangOpts().CPlusPlus && \"Call sites of this function should be guarded by checking for C++\"" , "/build/llvm-toolchain-snapshot-8~svn345461/tools/clang/lib/Parse/ParseExprCXX.cpp" , 155, __PRETTY_FUNCTION__)) | |||
155 | "Call sites of this function should be guarded by checking for C++")((getLangOpts().CPlusPlus && "Call sites of this function should be guarded by checking for C++" ) ? static_cast<void> (0) : __assert_fail ("getLangOpts().CPlusPlus && \"Call sites of this function should be guarded by checking for C++\"" , "/build/llvm-toolchain-snapshot-8~svn345461/tools/clang/lib/Parse/ParseExprCXX.cpp" , 155, __PRETTY_FUNCTION__)); | |||
156 | ||||
157 | if (Tok.is(tok::annot_cxxscope)) { | |||
158 | assert(!LastII && "want last identifier but have already annotated scope")((!LastII && "want last identifier but have already annotated scope" ) ? static_cast<void> (0) : __assert_fail ("!LastII && \"want last identifier but have already annotated scope\"" , "/build/llvm-toolchain-snapshot-8~svn345461/tools/clang/lib/Parse/ParseExprCXX.cpp" , 158, __PRETTY_FUNCTION__)); | |||
159 | assert(!MayBePseudoDestructor && "unexpected annot_cxxscope")((!MayBePseudoDestructor && "unexpected annot_cxxscope" ) ? static_cast<void> (0) : __assert_fail ("!MayBePseudoDestructor && \"unexpected annot_cxxscope\"" , "/build/llvm-toolchain-snapshot-8~svn345461/tools/clang/lib/Parse/ParseExprCXX.cpp" , 159, __PRETTY_FUNCTION__)); | |||
160 | Actions.RestoreNestedNameSpecifierAnnotation(Tok.getAnnotationValue(), | |||
161 | Tok.getAnnotationRange(), | |||
162 | SS); | |||
163 | ConsumeAnnotationToken(); | |||
164 | return false; | |||
165 | } | |||
166 | ||||
167 | if (Tok.is(tok::annot_template_id)) { | |||
168 | // If the current token is an annotated template id, it may already have | |||
169 | // a scope specifier. Restore it. | |||
170 | TemplateIdAnnotation *TemplateId = takeTemplateIdAnnotation(Tok); | |||
171 | SS = TemplateId->SS; | |||
172 | } | |||
173 | ||||
174 | // Has to happen before any "return false"s in this function. | |||
175 | bool CheckForDestructor = false; | |||
176 | if (MayBePseudoDestructor && *MayBePseudoDestructor) { | |||
177 | CheckForDestructor = true; | |||
178 | *MayBePseudoDestructor = false; | |||
179 | } | |||
180 | ||||
181 | if (LastII) | |||
182 | *LastII = nullptr; | |||
183 | ||||
184 | bool HasScopeSpecifier = false; | |||
185 | ||||
186 | if (Tok.is(tok::coloncolon)) { | |||
187 | // ::new and ::delete aren't nested-name-specifiers. | |||
188 | tok::TokenKind NextKind = NextToken().getKind(); | |||
189 | if (NextKind == tok::kw_new || NextKind == tok::kw_delete) | |||
190 | return false; | |||
191 | ||||
192 | if (NextKind == tok::l_brace) { | |||
193 | // It is invalid to have :: {, consume the scope qualifier and pretend | |||
194 | // like we never saw it. | |||
195 | Diag(ConsumeToken(), diag::err_expected) << tok::identifier; | |||
196 | } else { | |||
197 | // '::' - Global scope qualifier. | |||
198 | if (Actions.ActOnCXXGlobalScopeSpecifier(ConsumeToken(), SS)) | |||
199 | return true; | |||
200 | ||||
201 | HasScopeSpecifier = true; | |||
202 | } | |||
203 | } | |||
204 | ||||
205 | if (Tok.is(tok::kw___super)) { | |||
206 | SourceLocation SuperLoc = ConsumeToken(); | |||
207 | if (!Tok.is(tok::coloncolon)) { | |||
208 | Diag(Tok.getLocation(), diag::err_expected_coloncolon_after_super); | |||
209 | return true; | |||
210 | } | |||
211 | ||||
212 | return Actions.ActOnSuperScopeSpecifier(SuperLoc, ConsumeToken(), SS); | |||
213 | } | |||
214 | ||||
215 | if (!HasScopeSpecifier && | |||
216 | Tok.isOneOf(tok::kw_decltype, tok::annot_decltype)) { | |||
217 | DeclSpec DS(AttrFactory); | |||
218 | SourceLocation DeclLoc = Tok.getLocation(); | |||
219 | SourceLocation EndLoc = ParseDecltypeSpecifier(DS); | |||
220 | ||||
221 | SourceLocation CCLoc; | |||
222 | // Work around a standard defect: 'decltype(auto)::' is not a | |||
223 | // nested-name-specifier. | |||
224 | if (DS.getTypeSpecType() == DeclSpec::TST_decltype_auto || | |||
225 | !TryConsumeToken(tok::coloncolon, CCLoc)) { | |||
226 | AnnotateExistingDecltypeSpecifier(DS, DeclLoc, EndLoc); | |||
227 | return false; | |||
228 | } | |||
229 | ||||
230 | if (Actions.ActOnCXXNestedNameSpecifierDecltype(SS, DS, CCLoc)) | |||
231 | SS.SetInvalid(SourceRange(DeclLoc, CCLoc)); | |||
232 | ||||
233 | HasScopeSpecifier = true; | |||
234 | } | |||
235 | ||||
236 | while (true) { | |||
237 | if (HasScopeSpecifier) { | |||
238 | // C++ [basic.lookup.classref]p5: | |||
239 | // If the qualified-id has the form | |||
240 | // | |||
241 | // ::class-name-or-namespace-name::... | |||
242 | // | |||
243 | // the class-name-or-namespace-name is looked up in global scope as a | |||
244 | // class-name or namespace-name. | |||
245 | // | |||
246 | // To implement this, we clear out the object type as soon as we've | |||
247 | // seen a leading '::' or part of a nested-name-specifier. | |||
248 | ObjectType = nullptr; | |||
249 | ||||
250 | if (Tok.is(tok::code_completion)) { | |||
251 | // Code completion for a nested-name-specifier, where the code | |||
252 | // completion token follows the '::'. | |||
253 | Actions.CodeCompleteQualifiedId(getCurScope(), SS, EnteringContext); | |||
254 | // Include code completion token into the range of the scope otherwise | |||
255 | // when we try to annotate the scope tokens the dangling code completion | |||
256 | // token will cause assertion in | |||
257 | // Preprocessor::AnnotatePreviousCachedTokens. | |||
258 | SS.setEndLoc(Tok.getLocation()); | |||
259 | cutOffParsing(); | |||
260 | return true; | |||
261 | } | |||
262 | } | |||
263 | ||||
264 | // nested-name-specifier: | |||
265 | // nested-name-specifier 'template'[opt] simple-template-id '::' | |||
266 | ||||
267 | // Parse the optional 'template' keyword, then make sure we have | |||
268 | // 'identifier <' after it. | |||
269 | if (Tok.is(tok::kw_template)) { | |||
270 | // If we don't have a scope specifier or an object type, this isn't a | |||
271 | // nested-name-specifier, since they aren't allowed to start with | |||
272 | // 'template'. | |||
273 | if (!HasScopeSpecifier && !ObjectType) | |||
274 | break; | |||
275 | ||||
276 | TentativeParsingAction TPA(*this); | |||
277 | SourceLocation TemplateKWLoc = ConsumeToken(); | |||
278 | ||||
279 | UnqualifiedId TemplateName; | |||
280 | if (Tok.is(tok::identifier)) { | |||
281 | // Consume the identifier. | |||
282 | TemplateName.setIdentifier(Tok.getIdentifierInfo(), Tok.getLocation()); | |||
283 | ConsumeToken(); | |||
284 | } else if (Tok.is(tok::kw_operator)) { | |||
285 | // We don't need to actually parse the unqualified-id in this case, | |||
286 | // because a simple-template-id cannot start with 'operator', but | |||
287 | // go ahead and parse it anyway for consistency with the case where | |||
288 | // we already annotated the template-id. | |||
289 | if (ParseUnqualifiedIdOperator(SS, EnteringContext, ObjectType, | |||
290 | TemplateName)) { | |||
291 | TPA.Commit(); | |||
292 | break; | |||
293 | } | |||
294 | ||||
295 | if (TemplateName.getKind() != UnqualifiedIdKind::IK_OperatorFunctionId && | |||
296 | TemplateName.getKind() != UnqualifiedIdKind::IK_LiteralOperatorId) { | |||
297 | Diag(TemplateName.getSourceRange().getBegin(), | |||
298 | diag::err_id_after_template_in_nested_name_spec) | |||
299 | << TemplateName.getSourceRange(); | |||
300 | TPA.Commit(); | |||
301 | break; | |||
302 | } | |||
303 | } else { | |||
304 | TPA.Revert(); | |||
305 | break; | |||
306 | } | |||
307 | ||||
308 | // If the next token is not '<', we have a qualified-id that refers | |||
309 | // to a template name, such as T::template apply, but is not a | |||
310 | // template-id. | |||
311 | if (Tok.isNot(tok::less)) { | |||
312 | TPA.Revert(); | |||
313 | break; | |||
314 | } | |||
315 | ||||
316 | // Commit to parsing the template-id. | |||
317 | TPA.Commit(); | |||
318 | TemplateTy Template; | |||
319 | if (TemplateNameKind TNK = Actions.ActOnDependentTemplateName( | |||
320 | getCurScope(), SS, TemplateKWLoc, TemplateName, ObjectType, | |||
321 | EnteringContext, Template, /*AllowInjectedClassName*/ true)) { | |||
322 | if (AnnotateTemplateIdToken(Template, TNK, SS, TemplateKWLoc, | |||
323 | TemplateName, false)) | |||
324 | return true; | |||
325 | } else | |||
326 | return true; | |||
327 | ||||
328 | continue; | |||
329 | } | |||
330 | ||||
331 | if (Tok.is(tok::annot_template_id) && NextToken().is(tok::coloncolon)) { | |||
332 | // We have | |||
333 | // | |||
334 | // template-id '::' | |||
335 | // | |||
336 | // So we need to check whether the template-id is a simple-template-id of | |||
337 | // the right kind (it should name a type or be dependent), and then | |||
338 | // convert it into a type within the nested-name-specifier. | |||
339 | TemplateIdAnnotation *TemplateId = takeTemplateIdAnnotation(Tok); | |||
340 | if (CheckForDestructor && GetLookAheadToken(2).is(tok::tilde)) { | |||
341 | *MayBePseudoDestructor = true; | |||
342 | return false; | |||
343 | } | |||
344 | ||||
345 | if (LastII) | |||
346 | *LastII = TemplateId->Name; | |||
347 | ||||
348 | // Consume the template-id token. | |||
349 | ConsumeAnnotationToken(); | |||
350 | ||||
351 | assert(Tok.is(tok::coloncolon) && "NextToken() not working properly!")((Tok.is(tok::coloncolon) && "NextToken() not working properly!" ) ? static_cast<void> (0) : __assert_fail ("Tok.is(tok::coloncolon) && \"NextToken() not working properly!\"" , "/build/llvm-toolchain-snapshot-8~svn345461/tools/clang/lib/Parse/ParseExprCXX.cpp" , 351, __PRETTY_FUNCTION__)); | |||
352 | SourceLocation CCLoc = ConsumeToken(); | |||
353 | ||||
354 | HasScopeSpecifier = true; | |||
355 | ||||
356 | ASTTemplateArgsPtr TemplateArgsPtr(TemplateId->getTemplateArgs(), | |||
357 | TemplateId->NumArgs); | |||
358 | ||||
359 | if (Actions.ActOnCXXNestedNameSpecifier(getCurScope(), | |||
360 | SS, | |||
361 | TemplateId->TemplateKWLoc, | |||
362 | TemplateId->Template, | |||
363 | TemplateId->TemplateNameLoc, | |||
364 | TemplateId->LAngleLoc, | |||
365 | TemplateArgsPtr, | |||
366 | TemplateId->RAngleLoc, | |||
367 | CCLoc, | |||
368 | EnteringContext)) { | |||
369 | SourceLocation StartLoc | |||
370 | = SS.getBeginLoc().isValid()? SS.getBeginLoc() | |||
371 | : TemplateId->TemplateNameLoc; | |||
372 | SS.SetInvalid(SourceRange(StartLoc, CCLoc)); | |||
373 | } | |||
374 | ||||
375 | continue; | |||
376 | } | |||
377 | ||||
378 | // The rest of the nested-name-specifier possibilities start with | |||
379 | // tok::identifier. | |||
380 | if (Tok.isNot(tok::identifier)) | |||
381 | break; | |||
382 | ||||
383 | IdentifierInfo &II = *Tok.getIdentifierInfo(); | |||
384 | ||||
385 | // nested-name-specifier: | |||
386 | // type-name '::' | |||
387 | // namespace-name '::' | |||
388 | // nested-name-specifier identifier '::' | |||
389 | Token Next = NextToken(); | |||
390 | Sema::NestedNameSpecInfo IdInfo(&II, Tok.getLocation(), Next.getLocation(), | |||
391 | ObjectType); | |||
392 | ||||
393 | // If we get foo:bar, this is almost certainly a typo for foo::bar. Recover | |||
394 | // and emit a fixit hint for it. | |||
395 | if (Next.is(tok::colon) && !ColonIsSacred) { | |||
396 | if (Actions.IsInvalidUnlessNestedName(getCurScope(), SS, IdInfo, | |||
397 | EnteringContext) && | |||
398 | // If the token after the colon isn't an identifier, it's still an | |||
399 | // error, but they probably meant something else strange so don't | |||
400 | // recover like this. | |||
401 | PP.LookAhead(1).is(tok::identifier)) { | |||
402 | Diag(Next, diag::err_unexpected_colon_in_nested_name_spec) | |||
403 | << FixItHint::CreateReplacement(Next.getLocation(), "::"); | |||
404 | // Recover as if the user wrote '::'. | |||
405 | Next.setKind(tok::coloncolon); | |||
406 | } | |||
407 | } | |||
408 | ||||
409 | if (Next.is(tok::coloncolon) && GetLookAheadToken(2).is(tok::l_brace)) { | |||
410 | // It is invalid to have :: {, consume the scope qualifier and pretend | |||
411 | // like we never saw it. | |||
412 | Token Identifier = Tok; // Stash away the identifier. | |||
413 | ConsumeToken(); // Eat the identifier, current token is now '::'. | |||
414 | Diag(PP.getLocForEndOfToken(ConsumeToken()), diag::err_expected) | |||
415 | << tok::identifier; | |||
416 | UnconsumeToken(Identifier); // Stick the identifier back. | |||
417 | Next = NextToken(); // Point Next at the '{' token. | |||
418 | } | |||
419 | ||||
420 | if (Next.is(tok::coloncolon)) { | |||
421 | if (CheckForDestructor && GetLookAheadToken(2).is(tok::tilde) && | |||
422 | !Actions.isNonTypeNestedNameSpecifier(getCurScope(), SS, IdInfo)) { | |||
423 | *MayBePseudoDestructor = true; | |||
424 | return false; | |||
425 | } | |||
426 | ||||
427 | if (ColonIsSacred) { | |||
428 | const Token &Next2 = GetLookAheadToken(2); | |||
429 | if (Next2.is(tok::kw_private) || Next2.is(tok::kw_protected) || | |||
430 | Next2.is(tok::kw_public) || Next2.is(tok::kw_virtual)) { | |||
431 | Diag(Next2, diag::err_unexpected_token_in_nested_name_spec) | |||
432 | << Next2.getName() | |||
433 | << FixItHint::CreateReplacement(Next.getLocation(), ":"); | |||
434 | Token ColonColon; | |||
435 | PP.Lex(ColonColon); | |||
436 | ColonColon.setKind(tok::colon); | |||
437 | PP.EnterToken(ColonColon); | |||
438 | break; | |||
439 | } | |||
440 | } | |||
441 | ||||
442 | if (LastII) | |||
443 | *LastII = &II; | |||
444 | ||||
445 | // We have an identifier followed by a '::'. Lookup this name | |||
446 | // as the name in a nested-name-specifier. | |||
447 | Token Identifier = Tok; | |||
448 | SourceLocation IdLoc = ConsumeToken(); | |||
449 | assert(Tok.isOneOf(tok::coloncolon, tok::colon) &&((Tok.isOneOf(tok::coloncolon, tok::colon) && "NextToken() not working properly!" ) ? static_cast<void> (0) : __assert_fail ("Tok.isOneOf(tok::coloncolon, tok::colon) && \"NextToken() not working properly!\"" , "/build/llvm-toolchain-snapshot-8~svn345461/tools/clang/lib/Parse/ParseExprCXX.cpp" , 450, __PRETTY_FUNCTION__)) | |||
450 | "NextToken() not working properly!")((Tok.isOneOf(tok::coloncolon, tok::colon) && "NextToken() not working properly!" ) ? static_cast<void> (0) : __assert_fail ("Tok.isOneOf(tok::coloncolon, tok::colon) && \"NextToken() not working properly!\"" , "/build/llvm-toolchain-snapshot-8~svn345461/tools/clang/lib/Parse/ParseExprCXX.cpp" , 450, __PRETTY_FUNCTION__)); | |||
451 | Token ColonColon = Tok; | |||
452 | SourceLocation CCLoc = ConsumeToken(); | |||
453 | ||||
454 | bool IsCorrectedToColon = false; | |||
455 | bool *CorrectionFlagPtr = ColonIsSacred ? &IsCorrectedToColon : nullptr; | |||
456 | if (Actions.ActOnCXXNestedNameSpecifier( | |||
457 | getCurScope(), IdInfo, EnteringContext, SS, false, | |||
458 | CorrectionFlagPtr, OnlyNamespace)) { | |||
459 | // Identifier is not recognized as a nested name, but we can have | |||
460 | // mistyped '::' instead of ':'. | |||
461 | if (CorrectionFlagPtr && IsCorrectedToColon) { | |||
462 | ColonColon.setKind(tok::colon); | |||
463 | PP.EnterToken(Tok); | |||
464 | PP.EnterToken(ColonColon); | |||
465 | Tok = Identifier; | |||
466 | break; | |||
467 | } | |||
468 | SS.SetInvalid(SourceRange(IdLoc, CCLoc)); | |||
469 | } | |||
470 | HasScopeSpecifier = true; | |||
471 | continue; | |||
472 | } | |||
473 | ||||
474 | CheckForTemplateAndDigraph(Next, ObjectType, EnteringContext, II, SS); | |||
475 | ||||
476 | // nested-name-specifier: | |||
477 | // type-name '<' | |||
478 | if (Next.is(tok::less)) { | |||
479 | TemplateTy Template; | |||
480 | UnqualifiedId TemplateName; | |||
481 | TemplateName.setIdentifier(&II, Tok.getLocation()); | |||
482 | bool MemberOfUnknownSpecialization; | |||
483 | if (TemplateNameKind TNK = Actions.isTemplateName(getCurScope(), SS, | |||
484 | /*hasTemplateKeyword=*/false, | |||
485 | TemplateName, | |||
486 | ObjectType, | |||
487 | EnteringContext, | |||
488 | Template, | |||
489 | MemberOfUnknownSpecialization)) { | |||
490 | // We have found a template name, so annotate this token | |||
491 | // with a template-id annotation. We do not permit the | |||
492 | // template-id to be translated into a type annotation, | |||
493 | // because some clients (e.g., the parsing of class template | |||
494 | // specializations) still want to see the original template-id | |||
495 | // token. | |||
496 | ConsumeToken(); | |||
497 | if (AnnotateTemplateIdToken(Template, TNK, SS, SourceLocation(), | |||
498 | TemplateName, false)) | |||
499 | return true; | |||
500 | continue; | |||
501 | } | |||
502 | ||||
503 | if (MemberOfUnknownSpecialization && (ObjectType || SS.isSet()) && | |||
504 | (IsTypename || IsTemplateArgumentList(1))) { | |||
505 | // We have something like t::getAs<T>, where getAs is a | |||
506 | // member of an unknown specialization. However, this will only | |||
507 | // parse correctly as a template, so suggest the keyword 'template' | |||
508 | // before 'getAs' and treat this as a dependent template name. | |||
509 | unsigned DiagID = diag::err_missing_dependent_template_keyword; | |||
510 | if (getLangOpts().MicrosoftExt) | |||
511 | DiagID = diag::warn_missing_dependent_template_keyword; | |||
512 | ||||
513 | Diag(Tok.getLocation(), DiagID) | |||
514 | << II.getName() | |||
515 | << FixItHint::CreateInsertion(Tok.getLocation(), "template "); | |||
516 | ||||
517 | if (TemplateNameKind TNK = Actions.ActOnDependentTemplateName( | |||
518 | getCurScope(), SS, Tok.getLocation(), TemplateName, ObjectType, | |||
519 | EnteringContext, Template, /*AllowInjectedClassName*/ true)) { | |||
520 | // Consume the identifier. | |||
521 | ConsumeToken(); | |||
522 | if (AnnotateTemplateIdToken(Template, TNK, SS, SourceLocation(), | |||
523 | TemplateName, false)) | |||
524 | return true; | |||
525 | } | |||
526 | else | |||
527 | return true; | |||
528 | ||||
529 | continue; | |||
530 | } | |||
531 | } | |||
532 | ||||
533 | // We don't have any tokens that form the beginning of a | |||
534 | // nested-name-specifier, so we're done. | |||
535 | break; | |||
536 | } | |||
537 | ||||
538 | // Even if we didn't see any pieces of a nested-name-specifier, we | |||
539 | // still check whether there is a tilde in this position, which | |||
540 | // indicates a potential pseudo-destructor. | |||
541 | if (CheckForDestructor && Tok.is(tok::tilde)) | |||
542 | *MayBePseudoDestructor = true; | |||
543 | ||||
544 | return false; | |||
545 | } | |||
546 | ||||
547 | ExprResult Parser::tryParseCXXIdExpression(CXXScopeSpec &SS, bool isAddressOfOperand, | |||
548 | Token &Replacement) { | |||
549 | SourceLocation TemplateKWLoc; | |||
550 | UnqualifiedId Name; | |||
551 | if (ParseUnqualifiedId(SS, | |||
552 | /*EnteringContext=*/false, | |||
553 | /*AllowDestructorName=*/false, | |||
554 | /*AllowConstructorName=*/false, | |||
555 | /*AllowDeductionGuide=*/false, | |||
556 | /*ObjectType=*/nullptr, &TemplateKWLoc, Name)) | |||
557 | return ExprError(); | |||
558 | ||||
559 | // This is only the direct operand of an & operator if it is not | |||
560 | // followed by a postfix-expression suffix. | |||
561 | if (isAddressOfOperand && isPostfixExpressionSuffixStart()) | |||
562 | isAddressOfOperand = false; | |||
563 | ||||
564 | ExprResult E = Actions.ActOnIdExpression( | |||
565 | getCurScope(), SS, TemplateKWLoc, Name, Tok.is(tok::l_paren), | |||
566 | isAddressOfOperand, nullptr, /*IsInlineAsmIdentifier=*/false, | |||
567 | &Replacement); | |||
568 | if (!E.isInvalid() && !E.isUnset() && Tok.is(tok::less)) | |||
569 | checkPotentialAngleBracket(E); | |||
570 | return E; | |||
571 | } | |||
572 | ||||
573 | /// ParseCXXIdExpression - Handle id-expression. | |||
574 | /// | |||
575 | /// id-expression: | |||
576 | /// unqualified-id | |||
577 | /// qualified-id | |||
578 | /// | |||
579 | /// qualified-id: | |||
580 | /// '::'[opt] nested-name-specifier 'template'[opt] unqualified-id | |||
581 | /// '::' identifier | |||
582 | /// '::' operator-function-id | |||
583 | /// '::' template-id | |||
584 | /// | |||
585 | /// NOTE: The standard specifies that, for qualified-id, the parser does not | |||
586 | /// expect: | |||
587 | /// | |||
588 | /// '::' conversion-function-id | |||
589 | /// '::' '~' class-name | |||
590 | /// | |||
591 | /// This may cause a slight inconsistency on diagnostics: | |||
592 | /// | |||
593 | /// class C {}; | |||
594 | /// namespace A {} | |||
595 | /// void f() { | |||
596 | /// :: A :: ~ C(); // Some Sema error about using destructor with a | |||
597 | /// // namespace. | |||
598 | /// :: ~ C(); // Some Parser error like 'unexpected ~'. | |||
599 | /// } | |||
600 | /// | |||
601 | /// We simplify the parser a bit and make it work like: | |||
602 | /// | |||
603 | /// qualified-id: | |||
604 | /// '::'[opt] nested-name-specifier 'template'[opt] unqualified-id | |||
605 | /// '::' unqualified-id | |||
606 | /// | |||
607 | /// That way Sema can handle and report similar errors for namespaces and the | |||
608 | /// global scope. | |||
609 | /// | |||
610 | /// The isAddressOfOperand parameter indicates that this id-expression is a | |||
611 | /// direct operand of the address-of operator. This is, besides member contexts, | |||
612 | /// the only place where a qualified-id naming a non-static class member may | |||
613 | /// appear. | |||
614 | /// | |||
615 | ExprResult Parser::ParseCXXIdExpression(bool isAddressOfOperand) { | |||
616 | // qualified-id: | |||
617 | // '::'[opt] nested-name-specifier 'template'[opt] unqualified-id | |||
618 | // '::' unqualified-id | |||
619 | // | |||
620 | CXXScopeSpec SS; | |||
621 | ParseOptionalCXXScopeSpecifier(SS, nullptr, /*EnteringContext=*/false); | |||
622 | ||||
623 | Token Replacement; | |||
624 | ExprResult Result = | |||
625 | tryParseCXXIdExpression(SS, isAddressOfOperand, Replacement); | |||
626 | if (Result.isUnset()) { | |||
627 | // If the ExprResult is valid but null, then typo correction suggested a | |||
628 | // keyword replacement that needs to be reparsed. | |||
629 | UnconsumeToken(Replacement); | |||
630 | Result = tryParseCXXIdExpression(SS, isAddressOfOperand, Replacement); | |||
631 | } | |||
632 | assert(!Result.isUnset() && "Typo correction suggested a keyword replacement "((!Result.isUnset() && "Typo correction suggested a keyword replacement " "for a previous keyword suggestion") ? static_cast<void> (0) : __assert_fail ("!Result.isUnset() && \"Typo correction suggested a keyword replacement \" \"for a previous keyword suggestion\"" , "/build/llvm-toolchain-snapshot-8~svn345461/tools/clang/lib/Parse/ParseExprCXX.cpp" , 633, __PRETTY_FUNCTION__)) | |||
633 | "for a previous keyword suggestion")((!Result.isUnset() && "Typo correction suggested a keyword replacement " "for a previous keyword suggestion") ? static_cast<void> (0) : __assert_fail ("!Result.isUnset() && \"Typo correction suggested a keyword replacement \" \"for a previous keyword suggestion\"" , "/build/llvm-toolchain-snapshot-8~svn345461/tools/clang/lib/Parse/ParseExprCXX.cpp" , 633, __PRETTY_FUNCTION__)); | |||
634 | return Result; | |||
635 | } | |||
636 | ||||
637 | /// ParseLambdaExpression - Parse a C++11 lambda expression. | |||
638 | /// | |||
639 | /// lambda-expression: | |||
640 | /// lambda-introducer lambda-declarator[opt] compound-statement | |||
641 | /// | |||
642 | /// lambda-introducer: | |||
643 | /// '[' lambda-capture[opt] ']' | |||
644 | /// | |||
645 | /// lambda-capture: | |||
646 | /// capture-default | |||
647 | /// capture-list | |||
648 | /// capture-default ',' capture-list | |||
649 | /// | |||
650 | /// capture-default: | |||
651 | /// '&' | |||
652 | /// '=' | |||
653 | /// | |||
654 | /// capture-list: | |||
655 | /// capture | |||
656 | /// capture-list ',' capture | |||
657 | /// | |||
658 | /// capture: | |||
659 | /// simple-capture | |||
660 | /// init-capture [C++1y] | |||
661 | /// | |||
662 | /// simple-capture: | |||
663 | /// identifier | |||
664 | /// '&' identifier | |||
665 | /// 'this' | |||
666 | /// | |||
667 | /// init-capture: [C++1y] | |||
668 | /// identifier initializer | |||
669 | /// '&' identifier initializer | |||
670 | /// | |||
671 | /// lambda-declarator: | |||
672 | /// '(' parameter-declaration-clause ')' attribute-specifier[opt] | |||
673 | /// 'mutable'[opt] exception-specification[opt] | |||
674 | /// trailing-return-type[opt] | |||
675 | /// | |||
676 | ExprResult Parser::ParseLambdaExpression() { | |||
677 | // Parse lambda-introducer. | |||
678 | LambdaIntroducer Intro; | |||
679 | Optional<unsigned> DiagID = ParseLambdaIntroducer(Intro); | |||
680 | if (DiagID) { | |||
681 | Diag(Tok, DiagID.getValue()); | |||
682 | SkipUntil(tok::r_square, StopAtSemi); | |||
683 | SkipUntil(tok::l_brace, StopAtSemi); | |||
684 | SkipUntil(tok::r_brace, StopAtSemi); | |||
685 | return ExprError(); | |||
686 | } | |||
687 | ||||
688 | return ParseLambdaExpressionAfterIntroducer(Intro); | |||
689 | } | |||
690 | ||||
691 | /// TryParseLambdaExpression - Use lookahead and potentially tentative | |||
692 | /// parsing to determine if we are looking at a C++0x lambda expression, and parse | |||
693 | /// it if we are. | |||
694 | /// | |||
695 | /// If we are not looking at a lambda expression, returns ExprError(). | |||
696 | ExprResult Parser::TryParseLambdaExpression() { | |||
697 | assert(getLangOpts().CPlusPlus11((getLangOpts().CPlusPlus11 && Tok.is(tok::l_square) && "Not at the start of a possible lambda expression.") ? static_cast <void> (0) : __assert_fail ("getLangOpts().CPlusPlus11 && Tok.is(tok::l_square) && \"Not at the start of a possible lambda expression.\"" , "/build/llvm-toolchain-snapshot-8~svn345461/tools/clang/lib/Parse/ParseExprCXX.cpp" , 699, __PRETTY_FUNCTION__)) | |||
698 | && Tok.is(tok::l_square)((getLangOpts().CPlusPlus11 && Tok.is(tok::l_square) && "Not at the start of a possible lambda expression.") ? static_cast <void> (0) : __assert_fail ("getLangOpts().CPlusPlus11 && Tok.is(tok::l_square) && \"Not at the start of a possible lambda expression.\"" , "/build/llvm-toolchain-snapshot-8~svn345461/tools/clang/lib/Parse/ParseExprCXX.cpp" , 699, __PRETTY_FUNCTION__)) | |||
699 | && "Not at the start of a possible lambda expression.")((getLangOpts().CPlusPlus11 && Tok.is(tok::l_square) && "Not at the start of a possible lambda expression.") ? static_cast <void> (0) : __assert_fail ("getLangOpts().CPlusPlus11 && Tok.is(tok::l_square) && \"Not at the start of a possible lambda expression.\"" , "/build/llvm-toolchain-snapshot-8~svn345461/tools/clang/lib/Parse/ParseExprCXX.cpp" , 699, __PRETTY_FUNCTION__)); | |||
700 | ||||
701 | const Token Next = NextToken(); | |||
702 | if (Next.is(tok::eof)) // Nothing else to lookup here... | |||
703 | return ExprEmpty(); | |||
704 | ||||
705 | const Token After = GetLookAheadToken(2); | |||
706 | // If lookahead indicates this is a lambda... | |||
707 | if (Next.is(tok::r_square) || // [] | |||
708 | Next.is(tok::equal) || // [= | |||
709 | (Next.is(tok::amp) && // [&] or [&, | |||
710 | (After.is(tok::r_square) || | |||
711 | After.is(tok::comma))) || | |||
712 | (Next.is(tok::identifier) && // [identifier] | |||
713 | After.is(tok::r_square))) { | |||
714 | return ParseLambdaExpression(); | |||
715 | } | |||
716 | ||||
717 | // If lookahead indicates an ObjC message send... | |||
718 | // [identifier identifier | |||
719 | if (Next.is(tok::identifier) && After.is(tok::identifier)) { | |||
720 | return ExprEmpty(); | |||
721 | } | |||
722 | ||||
723 | // Here, we're stuck: lambda introducers and Objective-C message sends are | |||
724 | // unambiguous, but it requires arbitrary lookhead. [a,b,c,d,e,f,g] is a | |||
725 | // lambda, and [a,b,c,d,e,f,g h] is a Objective-C message send. Instead of | |||
726 | // writing two routines to parse a lambda introducer, just try to parse | |||
727 | // a lambda introducer first, and fall back if that fails. | |||
728 | // (TryParseLambdaIntroducer never produces any diagnostic output.) | |||
729 | LambdaIntroducer Intro; | |||
730 | if (TryParseLambdaIntroducer(Intro)) | |||
731 | return ExprEmpty(); | |||
732 | ||||
733 | return ParseLambdaExpressionAfterIntroducer(Intro); | |||
734 | } | |||
735 | ||||
736 | /// Parse a lambda introducer. | |||
737 | /// \param Intro A LambdaIntroducer filled in with information about the | |||
738 | /// contents of the lambda-introducer. | |||
739 | /// \param SkippedInits If non-null, we are disambiguating between an Obj-C | |||
740 | /// message send and a lambda expression. In this mode, we will | |||
741 | /// sometimes skip the initializers for init-captures and not fully | |||
742 | /// populate \p Intro. This flag will be set to \c true if we do so. | |||
743 | /// \return A DiagnosticID if it hit something unexpected. The location for | |||
744 | /// the diagnostic is that of the current token. | |||
745 | Optional<unsigned> Parser::ParseLambdaIntroducer(LambdaIntroducer &Intro, | |||
746 | bool *SkippedInits) { | |||
747 | typedef Optional<unsigned> DiagResult; | |||
748 | ||||
749 | assert(Tok.is(tok::l_square) && "Lambda expressions begin with '['.")((Tok.is(tok::l_square) && "Lambda expressions begin with '['." ) ? static_cast<void> (0) : __assert_fail ("Tok.is(tok::l_square) && \"Lambda expressions begin with '['.\"" , "/build/llvm-toolchain-snapshot-8~svn345461/tools/clang/lib/Parse/ParseExprCXX.cpp" , 749, __PRETTY_FUNCTION__)); | |||
750 | BalancedDelimiterTracker T(*this, tok::l_square); | |||
751 | T.consumeOpen(); | |||
752 | ||||
753 | Intro.Range.setBegin(T.getOpenLocation()); | |||
754 | ||||
755 | bool first = true; | |||
756 | ||||
757 | // Parse capture-default. | |||
758 | if (Tok.is(tok::amp) && | |||
759 | (NextToken().is(tok::comma) || NextToken().is(tok::r_square))) { | |||
760 | Intro.Default = LCD_ByRef; | |||
761 | Intro.DefaultLoc = ConsumeToken(); | |||
762 | first = false; | |||
763 | } else if (Tok.is(tok::equal)) { | |||
764 | Intro.Default = LCD_ByCopy; | |||
765 | Intro.DefaultLoc = ConsumeToken(); | |||
766 | first = false; | |||
767 | } | |||
768 | ||||
769 | while (Tok.isNot(tok::r_square)) { | |||
770 | if (!first) { | |||
771 | if (Tok.isNot(tok::comma)) { | |||
772 | // Provide a completion for a lambda introducer here. Except | |||
773 | // in Objective-C, where this is Almost Surely meant to be a message | |||
774 | // send. In that case, fail here and let the ObjC message | |||
775 | // expression parser perform the completion. | |||
776 | if (Tok.is(tok::code_completion) && | |||
777 | !(getLangOpts().ObjC1 && Intro.Default == LCD_None && | |||
778 | !Intro.Captures.empty())) { | |||
779 | Actions.CodeCompleteLambdaIntroducer(getCurScope(), Intro, | |||
780 | /*AfterAmpersand=*/false); | |||
781 | cutOffParsing(); | |||
782 | break; | |||
783 | } | |||
784 | ||||
785 | return DiagResult(diag::err_expected_comma_or_rsquare); | |||
786 | } | |||
787 | ConsumeToken(); | |||
788 | } | |||
789 | ||||
790 | if (Tok.is(tok::code_completion)) { | |||
791 | // If we're in Objective-C++ and we have a bare '[', then this is more | |||
792 | // likely to be a message receiver. | |||
793 | if (getLangOpts().ObjC1 && first) | |||
794 | Actions.CodeCompleteObjCMessageReceiver(getCurScope()); | |||
795 | else | |||
796 | Actions.CodeCompleteLambdaIntroducer(getCurScope(), Intro, | |||
797 | /*AfterAmpersand=*/false); | |||
798 | cutOffParsing(); | |||
799 | break; | |||
800 | } | |||
801 | ||||
802 | first = false; | |||
803 | ||||
804 | // Parse capture. | |||
805 | LambdaCaptureKind Kind = LCK_ByCopy; | |||
806 | LambdaCaptureInitKind InitKind = LambdaCaptureInitKind::NoInit; | |||
807 | SourceLocation Loc; | |||
808 | IdentifierInfo *Id = nullptr; | |||
809 | SourceLocation EllipsisLoc; | |||
810 | ExprResult Init; | |||
811 | SourceLocation LocStart = Tok.getLocation(); | |||
812 | ||||
813 | if (Tok.is(tok::star)) { | |||
814 | Loc = ConsumeToken(); | |||
815 | if (Tok.is(tok::kw_this)) { | |||
816 | ConsumeToken(); | |||
817 | Kind = LCK_StarThis; | |||
818 | } else { | |||
819 | return DiagResult(diag::err_expected_star_this_capture); | |||
820 | } | |||
821 | } else if (Tok.is(tok::kw_this)) { | |||
822 | Kind = LCK_This; | |||
823 | Loc = ConsumeToken(); | |||
824 | } else { | |||
825 | if (Tok.is(tok::amp)) { | |||
826 | Kind = LCK_ByRef; | |||
827 | ConsumeToken(); | |||
828 | ||||
829 | if (Tok.is(tok::code_completion)) { | |||
830 | Actions.CodeCompleteLambdaIntroducer(getCurScope(), Intro, | |||
831 | /*AfterAmpersand=*/true); | |||
832 | cutOffParsing(); | |||
833 | break; | |||
834 | } | |||
835 | } | |||
836 | ||||
837 | if (Tok.is(tok::identifier)) { | |||
838 | Id = Tok.getIdentifierInfo(); | |||
839 | Loc = ConsumeToken(); | |||
840 | } else if (Tok.is(tok::kw_this)) { | |||
841 | // FIXME: If we want to suggest a fixit here, will need to return more | |||
842 | // than just DiagnosticID. Perhaps full DiagnosticBuilder that can be | |||
843 | // Clear()ed to prevent emission in case of tentative parsing? | |||
844 | return DiagResult(diag::err_this_captured_by_reference); | |||
845 | } else { | |||
846 | return DiagResult(diag::err_expected_capture); | |||
847 | } | |||
848 | ||||
849 | if (Tok.is(tok::l_paren)) { | |||
850 | BalancedDelimiterTracker Parens(*this, tok::l_paren); | |||
851 | Parens.consumeOpen(); | |||
852 | ||||
853 | InitKind = LambdaCaptureInitKind::DirectInit; | |||
854 | ||||
855 | ExprVector Exprs; | |||
856 | CommaLocsTy Commas; | |||
857 | if (SkippedInits) { | |||
858 | Parens.skipToEnd(); | |||
859 | *SkippedInits = true; | |||
860 | } else if (ParseExpressionList(Exprs, Commas)) { | |||
861 | Parens.skipToEnd(); | |||
862 | Init = ExprError(); | |||
863 | } else { | |||
864 | Parens.consumeClose(); | |||
865 | Init = Actions.ActOnParenListExpr(Parens.getOpenLocation(), | |||
866 | Parens.getCloseLocation(), | |||
867 | Exprs); | |||
868 | } | |||
869 | } else if (Tok.isOneOf(tok::l_brace, tok::equal)) { | |||
870 | // Each lambda init-capture forms its own full expression, which clears | |||
871 | // Actions.MaybeODRUseExprs. So create an expression evaluation context | |||
872 | // to save the necessary state, and restore it later. | |||
873 | EnterExpressionEvaluationContext EC( | |||
874 | Actions, Sema::ExpressionEvaluationContext::PotentiallyEvaluated); | |||
875 | ||||
876 | if (TryConsumeToken(tok::equal)) | |||
877 | InitKind = LambdaCaptureInitKind::CopyInit; | |||
878 | else | |||
879 | InitKind = LambdaCaptureInitKind::ListInit; | |||
880 | ||||
881 | if (!SkippedInits) { | |||
882 | Init = ParseInitializer(); | |||
883 | } else if (Tok.is(tok::l_brace)) { | |||
884 | BalancedDelimiterTracker Braces(*this, tok::l_brace); | |||
885 | Braces.consumeOpen(); | |||
886 | Braces.skipToEnd(); | |||
887 | *SkippedInits = true; | |||
888 | } else { | |||
889 | // We're disambiguating this: | |||
890 | // | |||
891 | // [..., x = expr | |||
892 | // | |||
893 | // We need to find the end of the following expression in order to | |||
894 | // determine whether this is an Obj-C message send's receiver, a | |||
895 | // C99 designator, or a lambda init-capture. | |||
896 | // | |||
897 | // Parse the expression to find where it ends, and annotate it back | |||
898 | // onto the tokens. We would have parsed this expression the same way | |||
899 | // in either case: both the RHS of an init-capture and the RHS of an | |||
900 | // assignment expression are parsed as an initializer-clause, and in | |||
901 | // neither case can anything be added to the scope between the '[' and | |||
902 | // here. | |||
903 | // | |||
904 | // FIXME: This is horrible. Adding a mechanism to skip an expression | |||
905 | // would be much cleaner. | |||
906 | // FIXME: If there is a ',' before the next ']' or ':', we can skip to | |||
907 | // that instead. (And if we see a ':' with no matching '?', we can | |||
908 | // classify this as an Obj-C message send.) | |||
909 | SourceLocation StartLoc = Tok.getLocation(); | |||
910 | InMessageExpressionRAIIObject MaybeInMessageExpression(*this, true); | |||
911 | Init = ParseInitializer(); | |||
912 | if (!Init.isInvalid()) | |||
913 | Init = Actions.CorrectDelayedTyposInExpr(Init.get()); | |||
914 | ||||
915 | if (Tok.getLocation() != StartLoc) { | |||
916 | // Back out the lexing of the token after the initializer. | |||
917 | PP.RevertCachedTokens(1); | |||
918 | ||||
919 | // Replace the consumed tokens with an appropriate annotation. | |||
920 | Tok.setLocation(StartLoc); | |||
921 | Tok.setKind(tok::annot_primary_expr); | |||
922 | setExprAnnotation(Tok, Init); | |||
923 | Tok.setAnnotationEndLoc(PP.getLastCachedTokenLocation()); | |||
924 | PP.AnnotateCachedTokens(Tok); | |||
925 | ||||
926 | // Consume the annotated initializer. | |||
927 | ConsumeAnnotationToken(); | |||
928 | } | |||
929 | } | |||
930 | } else | |||
931 | TryConsumeToken(tok::ellipsis, EllipsisLoc); | |||
932 | } | |||
933 | // If this is an init capture, process the initialization expression | |||
934 | // right away. For lambda init-captures such as the following: | |||
935 | // const int x = 10; | |||
936 | // auto L = [i = x+1](int a) { | |||
937 | // return [j = x+2, | |||
938 | // &k = x](char b) { }; | |||
939 | // }; | |||
940 | // keep in mind that each lambda init-capture has to have: | |||
941 | // - its initialization expression executed in the context | |||
942 | // of the enclosing/parent decl-context. | |||
943 | // - but the variable itself has to be 'injected' into the | |||
944 | // decl-context of its lambda's call-operator (which has | |||
945 | // not yet been created). | |||
946 | // Each init-expression is a full-expression that has to get | |||
947 | // Sema-analyzed (for capturing etc.) before its lambda's | |||
948 | // call-operator's decl-context, scope & scopeinfo are pushed on their | |||
949 | // respective stacks. Thus if any variable is odr-used in the init-capture | |||
950 | // it will correctly get captured in the enclosing lambda, if one exists. | |||
951 | // The init-variables above are created later once the lambdascope and | |||
952 | // call-operators decl-context is pushed onto its respective stack. | |||
953 | ||||
954 | // Since the lambda init-capture's initializer expression occurs in the | |||
955 | // context of the enclosing function or lambda, therefore we can not wait | |||
956 | // till a lambda scope has been pushed on before deciding whether the | |||
957 | // variable needs to be captured. We also need to process all | |||
958 | // lvalue-to-rvalue conversions and discarded-value conversions, | |||
959 | // so that we can avoid capturing certain constant variables. | |||
960 | // For e.g., | |||
961 | // void test() { | |||
962 | // const int x = 10; | |||
963 | // auto L = [&z = x](char a) { <-- don't capture by the current lambda | |||
964 | // return [y = x](int i) { <-- don't capture by enclosing lambda | |||
965 | // return y; | |||
966 | // } | |||
967 | // }; | |||
968 | // } | |||
969 | // If x was not const, the second use would require 'L' to capture, and | |||
970 | // that would be an error. | |||
971 | ||||
972 | ParsedType InitCaptureType; | |||
973 | if (!Init.isInvalid()) | |||
974 | Init = Actions.CorrectDelayedTyposInExpr(Init.get()); | |||
975 | if (Init.isUsable()) { | |||
976 | // Get the pointer and store it in an lvalue, so we can use it as an | |||
977 | // out argument. | |||
978 | Expr *InitExpr = Init.get(); | |||
979 | // This performs any lvalue-to-rvalue conversions if necessary, which | |||
980 | // can affect what gets captured in the containing decl-context. | |||
981 | InitCaptureType = Actions.actOnLambdaInitCaptureInitialization( | |||
982 | Loc, Kind == LCK_ByRef, Id, InitKind, InitExpr); | |||
983 | Init = InitExpr; | |||
984 | } | |||
985 | ||||
986 | SourceLocation LocEnd = PrevTokLocation; | |||
987 | ||||
988 | Intro.addCapture(Kind, Loc, Id, EllipsisLoc, InitKind, Init, | |||
989 | InitCaptureType, SourceRange(LocStart, LocEnd)); | |||
990 | } | |||
991 | ||||
992 | T.consumeClose(); | |||
993 | Intro.Range.setEnd(T.getCloseLocation()); | |||
994 | return DiagResult(); | |||
995 | } | |||
996 | ||||
997 | /// TryParseLambdaIntroducer - Tentatively parse a lambda introducer. | |||
998 | /// | |||
999 | /// Returns true if it hit something unexpected. | |||
1000 | bool Parser::TryParseLambdaIntroducer(LambdaIntroducer &Intro) { | |||
1001 | { | |||
1002 | bool SkippedInits = false; | |||
1003 | TentativeParsingAction PA1(*this); | |||
1004 | ||||
1005 | if (ParseLambdaIntroducer(Intro, &SkippedInits)) { | |||
1006 | PA1.Revert(); | |||
1007 | return true; | |||
1008 | } | |||
1009 | ||||
1010 | if (!SkippedInits) { | |||
1011 | PA1.Commit(); | |||
1012 | return false; | |||
1013 | } | |||
1014 | ||||
1015 | PA1.Revert(); | |||
1016 | } | |||
1017 | ||||
1018 | // Try to parse it again, but this time parse the init-captures too. | |||
1019 | Intro = LambdaIntroducer(); | |||
1020 | TentativeParsingAction PA2(*this); | |||
1021 | ||||
1022 | if (!ParseLambdaIntroducer(Intro)) { | |||
1023 | PA2.Commit(); | |||
1024 | return false; | |||
1025 | } | |||
1026 | ||||
1027 | PA2.Revert(); | |||
1028 | return true; | |||
1029 | } | |||
1030 | ||||
1031 | static void | |||
1032 | tryConsumeMutableOrConstexprToken(Parser &P, SourceLocation &MutableLoc, | |||
1033 | SourceLocation &ConstexprLoc, | |||
1034 | SourceLocation &DeclEndLoc) { | |||
1035 | assert(MutableLoc.isInvalid())((MutableLoc.isInvalid()) ? static_cast<void> (0) : __assert_fail ("MutableLoc.isInvalid()", "/build/llvm-toolchain-snapshot-8~svn345461/tools/clang/lib/Parse/ParseExprCXX.cpp" , 1035, __PRETTY_FUNCTION__)); | |||
1036 | assert(ConstexprLoc.isInvalid())((ConstexprLoc.isInvalid()) ? static_cast<void> (0) : __assert_fail ("ConstexprLoc.isInvalid()", "/build/llvm-toolchain-snapshot-8~svn345461/tools/clang/lib/Parse/ParseExprCXX.cpp" , 1036, __PRETTY_FUNCTION__)); | |||
1037 | // Consume constexpr-opt mutable-opt in any sequence, and set the DeclEndLoc | |||
1038 | // to the final of those locations. Emit an error if we have multiple | |||
1039 | // copies of those keywords and recover. | |||
1040 | ||||
1041 | while (true) { | |||
1042 | switch (P.getCurToken().getKind()) { | |||
1043 | case tok::kw_mutable: { | |||
1044 | if (MutableLoc.isValid()) { | |||
1045 | P.Diag(P.getCurToken().getLocation(), | |||
1046 | diag::err_lambda_decl_specifier_repeated) | |||
1047 | << 0 << FixItHint::CreateRemoval(P.getCurToken().getLocation()); | |||
1048 | } | |||
1049 | MutableLoc = P.ConsumeToken(); | |||
1050 | DeclEndLoc = MutableLoc; | |||
1051 | break /*switch*/; | |||
1052 | } | |||
1053 | case tok::kw_constexpr: | |||
1054 | if (ConstexprLoc.isValid()) { | |||
1055 | P.Diag(P.getCurToken().getLocation(), | |||
1056 | diag::err_lambda_decl_specifier_repeated) | |||
1057 | << 1 << FixItHint::CreateRemoval(P.getCurToken().getLocation()); | |||
1058 | } | |||
1059 | ConstexprLoc = P.ConsumeToken(); | |||
1060 | DeclEndLoc = ConstexprLoc; | |||
1061 | break /*switch*/; | |||
1062 | default: | |||
1063 | return; | |||
1064 | } | |||
1065 | } | |||
1066 | } | |||
1067 | ||||
1068 | static void | |||
1069 | addConstexprToLambdaDeclSpecifier(Parser &P, SourceLocation ConstexprLoc, | |||
1070 | DeclSpec &DS) { | |||
1071 | if (ConstexprLoc.isValid()) { | |||
1072 | P.Diag(ConstexprLoc, !P.getLangOpts().CPlusPlus17 | |||
1073 | ? diag::ext_constexpr_on_lambda_cxx17 | |||
1074 | : diag::warn_cxx14_compat_constexpr_on_lambda); | |||
1075 | const char *PrevSpec = nullptr; | |||
1076 | unsigned DiagID = 0; | |||
1077 | DS.SetConstexprSpec(ConstexprLoc, PrevSpec, DiagID); | |||
1078 | assert(PrevSpec == nullptr && DiagID == 0 &&((PrevSpec == nullptr && DiagID == 0 && "Constexpr cannot have been set previously!" ) ? static_cast<void> (0) : __assert_fail ("PrevSpec == nullptr && DiagID == 0 && \"Constexpr cannot have been set previously!\"" , "/build/llvm-toolchain-snapshot-8~svn345461/tools/clang/lib/Parse/ParseExprCXX.cpp" , 1079, __PRETTY_FUNCTION__)) | |||
1079 | "Constexpr cannot have been set previously!")((PrevSpec == nullptr && DiagID == 0 && "Constexpr cannot have been set previously!" ) ? static_cast<void> (0) : __assert_fail ("PrevSpec == nullptr && DiagID == 0 && \"Constexpr cannot have been set previously!\"" , "/build/llvm-toolchain-snapshot-8~svn345461/tools/clang/lib/Parse/ParseExprCXX.cpp" , 1079, __PRETTY_FUNCTION__)); | |||
1080 | } | |||
1081 | } | |||
1082 | ||||
1083 | /// ParseLambdaExpressionAfterIntroducer - Parse the rest of a lambda | |||
1084 | /// expression. | |||
1085 | ExprResult Parser::ParseLambdaExpressionAfterIntroducer( | |||
1086 | LambdaIntroducer &Intro) { | |||
1087 | SourceLocation LambdaBeginLoc = Intro.Range.getBegin(); | |||
1088 | Diag(LambdaBeginLoc, diag::warn_cxx98_compat_lambda); | |||
1089 | ||||
1090 | PrettyStackTraceLoc CrashInfo(PP.getSourceManager(), LambdaBeginLoc, | |||
1091 | "lambda expression parsing"); | |||
1092 | ||||
1093 | ||||
1094 | ||||
1095 | // FIXME: Call into Actions to add any init-capture declarations to the | |||
1096 | // scope while parsing the lambda-declarator and compound-statement. | |||
1097 | ||||
1098 | // Parse lambda-declarator[opt]. | |||
1099 | DeclSpec DS(AttrFactory); | |||
1100 | Declarator D(DS, DeclaratorContext::LambdaExprContext); | |||
1101 | TemplateParameterDepthRAII CurTemplateDepthTracker(TemplateParameterDepth); | |||
1102 | Actions.PushLambdaScope(); | |||
1103 | ||||
1104 | ParsedAttributes Attr(AttrFactory); | |||
1105 | SourceLocation DeclLoc = Tok.getLocation(); | |||
1106 | if (getLangOpts().CUDA) { | |||
1107 | // In CUDA code, GNU attributes are allowed to appear immediately after the | |||
1108 | // "[...]", even if there is no "(...)" before the lambda body. | |||
1109 | MaybeParseGNUAttributes(D); | |||
1110 | } | |||
1111 | ||||
1112 | // Helper to emit a warning if we see a CUDA host/device/global attribute | |||
1113 | // after '(...)'. nvcc doesn't accept this. | |||
1114 | auto WarnIfHasCUDATargetAttr = [&] { | |||
1115 | if (getLangOpts().CUDA) | |||
1116 | for (const ParsedAttr &A : Attr) | |||
1117 | if (A.getKind() == ParsedAttr::AT_CUDADevice || | |||
1118 | A.getKind() == ParsedAttr::AT_CUDAHost || | |||
1119 | A.getKind() == ParsedAttr::AT_CUDAGlobal) | |||
1120 | Diag(A.getLoc(), diag::warn_cuda_attr_lambda_position) | |||
1121 | << A.getName()->getName(); | |||
1122 | }; | |||
1123 | ||||
1124 | TypeResult TrailingReturnType; | |||
1125 | if (Tok.is(tok::l_paren)) { | |||
1126 | ParseScope PrototypeScope(this, | |||
1127 | Scope::FunctionPrototypeScope | | |||
1128 | Scope::FunctionDeclarationScope | | |||
1129 | Scope::DeclScope); | |||
1130 | ||||
1131 | BalancedDelimiterTracker T(*this, tok::l_paren); | |||
1132 | T.consumeOpen(); | |||
1133 | SourceLocation LParenLoc = T.getOpenLocation(); | |||
1134 | ||||
1135 | // Parse parameter-declaration-clause. | |||
1136 | SmallVector<DeclaratorChunk::ParamInfo, 16> ParamInfo; | |||
1137 | SourceLocation EllipsisLoc; | |||
1138 | ||||
1139 | if (Tok.isNot(tok::r_paren)) { | |||
1140 | Actions.RecordParsingTemplateParameterDepth(TemplateParameterDepth); | |||
1141 | ParseParameterDeclarationClause(D, Attr, ParamInfo, EllipsisLoc); | |||
1142 | // For a generic lambda, each 'auto' within the parameter declaration | |||
1143 | // clause creates a template type parameter, so increment the depth. | |||
1144 | if (Actions.getCurGenericLambda()) | |||
1145 | ++CurTemplateDepthTracker; | |||
1146 | } | |||
1147 | T.consumeClose(); | |||
1148 | SourceLocation RParenLoc = T.getCloseLocation(); | |||
1149 | SourceLocation DeclEndLoc = RParenLoc; | |||
1150 | ||||
1151 | // GNU-style attributes must be parsed before the mutable specifier to be | |||
1152 | // compatible with GCC. | |||
1153 | MaybeParseGNUAttributes(Attr, &DeclEndLoc); | |||
1154 | ||||
1155 | // MSVC-style attributes must be parsed before the mutable specifier to be | |||
1156 | // compatible with MSVC. | |||
1157 | MaybeParseMicrosoftDeclSpecs(Attr, &DeclEndLoc); | |||
1158 | ||||
1159 | // Parse mutable-opt and/or constexpr-opt, and update the DeclEndLoc. | |||
1160 | SourceLocation MutableLoc; | |||
1161 | SourceLocation ConstexprLoc; | |||
1162 | tryConsumeMutableOrConstexprToken(*this, MutableLoc, ConstexprLoc, | |||
1163 | DeclEndLoc); | |||
1164 | ||||
1165 | addConstexprToLambdaDeclSpecifier(*this, ConstexprLoc, DS); | |||
1166 | ||||
1167 | // Parse exception-specification[opt]. | |||
1168 | ExceptionSpecificationType ESpecType = EST_None; | |||
1169 | SourceRange ESpecRange; | |||
1170 | SmallVector<ParsedType, 2> DynamicExceptions; | |||
1171 | SmallVector<SourceRange, 2> DynamicExceptionRanges; | |||
1172 | ExprResult NoexceptExpr; | |||
1173 | CachedTokens *ExceptionSpecTokens; | |||
1174 | ESpecType = tryParseExceptionSpecification(/*Delayed=*/false, | |||
1175 | ESpecRange, | |||
1176 | DynamicExceptions, | |||
1177 | DynamicExceptionRanges, | |||
1178 | NoexceptExpr, | |||
1179 | ExceptionSpecTokens); | |||
1180 | ||||
1181 | if (ESpecType != EST_None) | |||
1182 | DeclEndLoc = ESpecRange.getEnd(); | |||
1183 | ||||
1184 | // Parse attribute-specifier[opt]. | |||
1185 | MaybeParseCXX11Attributes(Attr, &DeclEndLoc); | |||
1186 | ||||
1187 | SourceLocation FunLocalRangeEnd = DeclEndLoc; | |||
1188 | ||||
1189 | // Parse trailing-return-type[opt]. | |||
1190 | if (Tok.is(tok::arrow)) { | |||
1191 | FunLocalRangeEnd = Tok.getLocation(); | |||
1192 | SourceRange Range; | |||
1193 | TrailingReturnType = | |||
1194 | ParseTrailingReturnType(Range, /*MayBeFollowedByDirectInit*/ false); | |||
1195 | if (Range.getEnd().isValid()) | |||
1196 | DeclEndLoc = Range.getEnd(); | |||
1197 | } | |||
1198 | ||||
1199 | PrototypeScope.Exit(); | |||
1200 | ||||
1201 | WarnIfHasCUDATargetAttr(); | |||
1202 | ||||
1203 | SourceLocation NoLoc; | |||
1204 | D.AddTypeInfo(DeclaratorChunk::getFunction( | |||
1205 | /*hasProto=*/true, | |||
1206 | /*isAmbiguous=*/false, LParenLoc, ParamInfo.data(), | |||
1207 | ParamInfo.size(), EllipsisLoc, RParenLoc, | |||
1208 | DS.getTypeQualifiers(), | |||
1209 | /*RefQualifierIsLValueRef=*/true, | |||
1210 | /*RefQualifierLoc=*/NoLoc, | |||
1211 | /*ConstQualifierLoc=*/NoLoc, | |||
1212 | /*VolatileQualifierLoc=*/NoLoc, | |||
1213 | /*RestrictQualifierLoc=*/NoLoc, MutableLoc, ESpecType, | |||
1214 | ESpecRange, DynamicExceptions.data(), | |||
1215 | DynamicExceptionRanges.data(), DynamicExceptions.size(), | |||
1216 | NoexceptExpr.isUsable() ? NoexceptExpr.get() : nullptr, | |||
1217 | /*ExceptionSpecTokens*/ nullptr, | |||
1218 | /*DeclsInPrototype=*/None, LParenLoc, FunLocalRangeEnd, D, | |||
1219 | TrailingReturnType), | |||
1220 | std::move(Attr), DeclEndLoc); | |||
1221 | } else if (Tok.isOneOf(tok::kw_mutable, tok::arrow, tok::kw___attribute, | |||
1222 | tok::kw_constexpr) || | |||
1223 | (Tok.is(tok::l_square) && NextToken().is(tok::l_square))) { | |||
1224 | // It's common to forget that one needs '()' before 'mutable', an attribute | |||
1225 | // specifier, or the result type. Deal with this. | |||
1226 | unsigned TokKind = 0; | |||
1227 | switch (Tok.getKind()) { | |||
1228 | case tok::kw_mutable: TokKind = 0; break; | |||
1229 | case tok::arrow: TokKind = 1; break; | |||
1230 | case tok::kw___attribute: | |||
1231 | case tok::l_square: TokKind = 2; break; | |||
1232 | case tok::kw_constexpr: TokKind = 3; break; | |||
1233 | default: llvm_unreachable("Unknown token kind")::llvm::llvm_unreachable_internal("Unknown token kind", "/build/llvm-toolchain-snapshot-8~svn345461/tools/clang/lib/Parse/ParseExprCXX.cpp" , 1233); | |||
1234 | } | |||
1235 | ||||
1236 | Diag(Tok, diag::err_lambda_missing_parens) | |||
1237 | << TokKind | |||
1238 | << FixItHint::CreateInsertion(Tok.getLocation(), "() "); | |||
1239 | SourceLocation DeclEndLoc = DeclLoc; | |||
1240 | ||||
1241 | // GNU-style attributes must be parsed before the mutable specifier to be | |||
1242 | // compatible with GCC. | |||
1243 | MaybeParseGNUAttributes(Attr, &DeclEndLoc); | |||
1244 | ||||
1245 | // Parse 'mutable', if it's there. | |||
1246 | SourceLocation MutableLoc; | |||
1247 | if (Tok.is(tok::kw_mutable)) { | |||
1248 | MutableLoc = ConsumeToken(); | |||
1249 | DeclEndLoc = MutableLoc; | |||
1250 | } | |||
1251 | ||||
1252 | // Parse attribute-specifier[opt]. | |||
1253 | MaybeParseCXX11Attributes(Attr, &DeclEndLoc); | |||
1254 | ||||
1255 | // Parse the return type, if there is one. | |||
1256 | if (Tok.is(tok::arrow)) { | |||
1257 | SourceRange Range; | |||
1258 | TrailingReturnType = | |||
1259 | ParseTrailingReturnType(Range, /*MayBeFollowedByDirectInit*/ false); | |||
1260 | if (Range.getEnd().isValid()) | |||
1261 | DeclEndLoc = Range.getEnd(); | |||
1262 | } | |||
1263 | ||||
1264 | WarnIfHasCUDATargetAttr(); | |||
1265 | ||||
1266 | SourceLocation NoLoc; | |||
1267 | D.AddTypeInfo(DeclaratorChunk::getFunction( | |||
1268 | /*hasProto=*/true, | |||
1269 | /*isAmbiguous=*/false, | |||
1270 | /*LParenLoc=*/NoLoc, | |||
1271 | /*Params=*/nullptr, | |||
1272 | /*NumParams=*/0, | |||
1273 | /*EllipsisLoc=*/NoLoc, | |||
1274 | /*RParenLoc=*/NoLoc, | |||
1275 | /*TypeQuals=*/0, | |||
1276 | /*RefQualifierIsLValueRef=*/true, | |||
1277 | /*RefQualifierLoc=*/NoLoc, | |||
1278 | /*ConstQualifierLoc=*/NoLoc, | |||
1279 | /*VolatileQualifierLoc=*/NoLoc, | |||
1280 | /*RestrictQualifierLoc=*/NoLoc, MutableLoc, EST_None, | |||
1281 | /*ESpecRange=*/SourceRange(), | |||
1282 | /*Exceptions=*/nullptr, | |||
1283 | /*ExceptionRanges=*/nullptr, | |||
1284 | /*NumExceptions=*/0, | |||
1285 | /*NoexceptExpr=*/nullptr, | |||
1286 | /*ExceptionSpecTokens=*/nullptr, | |||
1287 | /*DeclsInPrototype=*/None, DeclLoc, DeclEndLoc, D, | |||
1288 | TrailingReturnType), | |||
1289 | std::move(Attr), DeclEndLoc); | |||
1290 | } | |||
1291 | ||||
1292 | // FIXME: Rename BlockScope -> ClosureScope if we decide to continue using | |||
1293 | // it. | |||
1294 | unsigned ScopeFlags = Scope::BlockScope | Scope::FnScope | Scope::DeclScope | | |||
1295 | Scope::CompoundStmtScope; | |||
1296 | ParseScope BodyScope(this, ScopeFlags); | |||
1297 | ||||
1298 | Actions.ActOnStartOfLambdaDefinition(Intro, D, getCurScope()); | |||
1299 | ||||
1300 | // Parse compound-statement. | |||
1301 | if (!Tok.is(tok::l_brace)) { | |||
1302 | Diag(Tok, diag::err_expected_lambda_body); | |||
1303 | Actions.ActOnLambdaError(LambdaBeginLoc, getCurScope()); | |||
1304 | return ExprError(); | |||
1305 | } | |||
1306 | ||||
1307 | StmtResult Stmt(ParseCompoundStatementBody()); | |||
1308 | BodyScope.Exit(); | |||
1309 | ||||
1310 | if (!Stmt.isInvalid() && !TrailingReturnType.isInvalid()) | |||
1311 | return Actions.ActOnLambdaExpr(LambdaBeginLoc, Stmt.get(), getCurScope()); | |||
1312 | ||||
1313 | Actions.ActOnLambdaError(LambdaBeginLoc, getCurScope()); | |||
1314 | return ExprError(); | |||
1315 | } | |||
1316 | ||||
1317 | /// ParseCXXCasts - This handles the various ways to cast expressions to another | |||
1318 | /// type. | |||
1319 | /// | |||
1320 | /// postfix-expression: [C++ 5.2p1] | |||
1321 | /// 'dynamic_cast' '<' type-name '>' '(' expression ')' | |||
1322 | /// 'static_cast' '<' type-name '>' '(' expression ')' | |||
1323 | /// 'reinterpret_cast' '<' type-name '>' '(' expression ')' | |||
1324 | /// 'const_cast' '<' type-name '>' '(' expression ')' | |||
1325 | /// | |||
1326 | ExprResult Parser::ParseCXXCasts() { | |||
1327 | tok::TokenKind Kind = Tok.getKind(); | |||
1328 | const char *CastName = nullptr; // For error messages | |||
1329 | ||||
1330 | switch (Kind) { | |||
1331 | default: llvm_unreachable("Unknown C++ cast!")::llvm::llvm_unreachable_internal("Unknown C++ cast!", "/build/llvm-toolchain-snapshot-8~svn345461/tools/clang/lib/Parse/ParseExprCXX.cpp" , 1331); | |||
1332 | case tok::kw_const_cast: CastName = "const_cast"; break; | |||
1333 | case tok::kw_dynamic_cast: CastName = "dynamic_cast"; break; | |||
1334 | case tok::kw_reinterpret_cast: CastName = "reinterpret_cast"; break; | |||
1335 | case tok::kw_static_cast: CastName = "static_cast"; break; | |||
1336 | } | |||
1337 | ||||
1338 | SourceLocation OpLoc = ConsumeToken(); | |||
1339 | SourceLocation LAngleBracketLoc = Tok.getLocation(); | |||
1340 | ||||
1341 | // Check for "<::" which is parsed as "[:". If found, fix token stream, | |||
1342 | // diagnose error, suggest fix, and recover parsing. | |||
1343 | if (Tok.is(tok::l_square) && Tok.getLength() == 2) { | |||
1344 | Token Next = NextToken(); | |||
1345 | if (Next.is(tok::colon) && areTokensAdjacent(Tok, Next)) | |||
1346 | FixDigraph(*this, PP, Tok, Next, Kind, /*AtDigraph*/true); | |||
1347 | } | |||
1348 | ||||
1349 | if (ExpectAndConsume(tok::less, diag::err_expected_less_after, CastName)) | |||
1350 | return ExprError(); | |||
1351 | ||||
1352 | // Parse the common declaration-specifiers piece. | |||
1353 | DeclSpec DS(AttrFactory); | |||
1354 | ParseSpecifierQualifierList(DS); | |||
1355 | ||||
1356 | // Parse the abstract-declarator, if present. | |||
1357 | Declarator DeclaratorInfo(DS, DeclaratorContext::TypeNameContext); | |||
1358 | ParseDeclarator(DeclaratorInfo); | |||
1359 | ||||
1360 | SourceLocation RAngleBracketLoc = Tok.getLocation(); | |||
1361 | ||||
1362 | if (ExpectAndConsume(tok::greater)) | |||
1363 | return ExprError(Diag(LAngleBracketLoc, diag::note_matching) << tok::less); | |||
1364 | ||||
1365 | BalancedDelimiterTracker T(*this, tok::l_paren); | |||
1366 | ||||
1367 | if (T.expectAndConsume(diag::err_expected_lparen_after, CastName)) | |||
1368 | return ExprError(); | |||
1369 | ||||
1370 | ExprResult Result = ParseExpression(); | |||
1371 | ||||
1372 | // Match the ')'. | |||
1373 | T.consumeClose(); | |||
1374 | ||||
1375 | if (!Result.isInvalid() && !DeclaratorInfo.isInvalidType()) | |||
1376 | Result = Actions.ActOnCXXNamedCast(OpLoc, Kind, | |||
1377 | LAngleBracketLoc, DeclaratorInfo, | |||
1378 | RAngleBracketLoc, | |||
1379 | T.getOpenLocation(), Result.get(), | |||
1380 | T.getCloseLocation()); | |||
1381 | ||||
1382 | return Result; | |||
1383 | } | |||
1384 | ||||
1385 | /// ParseCXXTypeid - This handles the C++ typeid expression. | |||
1386 | /// | |||
1387 | /// postfix-expression: [C++ 5.2p1] | |||
1388 | /// 'typeid' '(' expression ')' | |||
1389 | /// 'typeid' '(' type-id ')' | |||
1390 | /// | |||
1391 | ExprResult Parser::ParseCXXTypeid() { | |||
1392 | assert(Tok.is(tok::kw_typeid) && "Not 'typeid'!")((Tok.is(tok::kw_typeid) && "Not 'typeid'!") ? static_cast <void> (0) : __assert_fail ("Tok.is(tok::kw_typeid) && \"Not 'typeid'!\"" , "/build/llvm-toolchain-snapshot-8~svn345461/tools/clang/lib/Parse/ParseExprCXX.cpp" , 1392, __PRETTY_FUNCTION__)); | |||
1393 | ||||
1394 | SourceLocation OpLoc = ConsumeToken(); | |||
1395 | SourceLocation LParenLoc, RParenLoc; | |||
1396 | BalancedDelimiterTracker T(*this, tok::l_paren); | |||
1397 | ||||
1398 | // typeid expressions are always parenthesized. | |||
1399 | if (T.expectAndConsume(diag::err_expected_lparen_after, "typeid")) | |||
1400 | return ExprError(); | |||
1401 | LParenLoc = T.getOpenLocation(); | |||
1402 | ||||
1403 | ExprResult Result; | |||
1404 | ||||
1405 | // C++0x [expr.typeid]p3: | |||
1406 | // When typeid is applied to an expression other than an lvalue of a | |||
1407 | // polymorphic class type [...] The expression is an unevaluated | |||
1408 | // operand (Clause 5). | |||
1409 | // | |||
1410 | // Note that we can't tell whether the expression is an lvalue of a | |||
1411 | // polymorphic class type until after we've parsed the expression; we | |||
1412 | // speculatively assume the subexpression is unevaluated, and fix it up | |||
1413 | // later. | |||
1414 | // | |||
1415 | // We enter the unevaluated context before trying to determine whether we | |||
1416 | // have a type-id, because the tentative parse logic will try to resolve | |||
1417 | // names, and must treat them as unevaluated. | |||
1418 | EnterExpressionEvaluationContext Unevaluated( | |||
1419 | Actions, Sema::ExpressionEvaluationContext::Unevaluated, | |||
1420 | Sema::ReuseLambdaContextDecl); | |||
1421 | ||||
1422 | if (isTypeIdInParens()) { | |||
1423 | TypeResult Ty = ParseTypeName(); | |||
1424 | ||||
1425 | // Match the ')'. | |||
1426 | T.consumeClose(); | |||
1427 | RParenLoc = T.getCloseLocation(); | |||
1428 | if (Ty.isInvalid() || RParenLoc.isInvalid()) | |||
1429 | return ExprError(); | |||
1430 | ||||
1431 | Result = Actions.ActOnCXXTypeid(OpLoc, LParenLoc, /*isType=*/true, | |||
1432 | Ty.get().getAsOpaquePtr(), RParenLoc); | |||
1433 | } else { | |||
1434 | Result = ParseExpression(); | |||
1435 | ||||
1436 | // Match the ')'. | |||
1437 | if (Result.isInvalid()) | |||
1438 | SkipUntil(tok::r_paren, StopAtSemi); | |||
1439 | else { | |||
1440 | T.consumeClose(); | |||
1441 | RParenLoc = T.getCloseLocation(); | |||
1442 | if (RParenLoc.isInvalid()) | |||
1443 | return ExprError(); | |||
1444 | ||||
1445 | Result = Actions.ActOnCXXTypeid(OpLoc, LParenLoc, /*isType=*/false, | |||
1446 | Result.get(), RParenLoc); | |||
1447 | } | |||
1448 | } | |||
1449 | ||||
1450 | return Result; | |||
1451 | } | |||
1452 | ||||
1453 | /// ParseCXXUuidof - This handles the Microsoft C++ __uuidof expression. | |||
1454 | /// | |||
1455 | /// '__uuidof' '(' expression ')' | |||
1456 | /// '__uuidof' '(' type-id ')' | |||
1457 | /// | |||
1458 | ExprResult Parser::ParseCXXUuidof() { | |||
1459 | assert(Tok.is(tok::kw___uuidof) && "Not '__uuidof'!")((Tok.is(tok::kw___uuidof) && "Not '__uuidof'!") ? static_cast <void> (0) : __assert_fail ("Tok.is(tok::kw___uuidof) && \"Not '__uuidof'!\"" , "/build/llvm-toolchain-snapshot-8~svn345461/tools/clang/lib/Parse/ParseExprCXX.cpp" , 1459, __PRETTY_FUNCTION__)); | |||
1460 | ||||
1461 | SourceLocation OpLoc = ConsumeToken(); | |||
1462 | BalancedDelimiterTracker T(*this, tok::l_paren); | |||
1463 | ||||
1464 | // __uuidof expressions are always parenthesized. | |||
1465 | if (T.expectAndConsume(diag::err_expected_lparen_after, "__uuidof")) | |||
1466 | return ExprError(); | |||
1467 | ||||
1468 | ExprResult Result; | |||
1469 | ||||
1470 | if (isTypeIdInParens()) { | |||
1471 | TypeResult Ty = ParseTypeName(); | |||
1472 | ||||
1473 | // Match the ')'. | |||
1474 | T.consumeClose(); | |||
1475 | ||||
1476 | if (Ty.isInvalid()) | |||
1477 | return ExprError(); | |||
1478 | ||||
1479 | Result = Actions.ActOnCXXUuidof(OpLoc, T.getOpenLocation(), /*isType=*/true, | |||
1480 | Ty.get().getAsOpaquePtr(), | |||
1481 | T.getCloseLocation()); | |||
1482 | } else { | |||
1483 | EnterExpressionEvaluationContext Unevaluated( | |||
1484 | Actions, Sema::ExpressionEvaluationContext::Unevaluated); | |||
1485 | Result = ParseExpression(); | |||
1486 | ||||
1487 | // Match the ')'. | |||
1488 | if (Result.isInvalid()) | |||
1489 | SkipUntil(tok::r_paren, StopAtSemi); | |||
1490 | else { | |||
1491 | T.consumeClose(); | |||
1492 | ||||
1493 | Result = Actions.ActOnCXXUuidof(OpLoc, T.getOpenLocation(), | |||
1494 | /*isType=*/false, | |||
1495 | Result.get(), T.getCloseLocation()); | |||
1496 | } | |||
1497 | } | |||
1498 | ||||
1499 | return Result; | |||
1500 | } | |||
1501 | ||||
1502 | /// Parse a C++ pseudo-destructor expression after the base, | |||
1503 | /// . or -> operator, and nested-name-specifier have already been | |||
1504 | /// parsed. | |||
1505 | /// | |||
1506 | /// postfix-expression: [C++ 5.2] | |||
1507 | /// postfix-expression . pseudo-destructor-name | |||
1508 | /// postfix-expression -> pseudo-destructor-name | |||
1509 | /// | |||
1510 | /// pseudo-destructor-name: | |||
1511 | /// ::[opt] nested-name-specifier[opt] type-name :: ~type-name | |||
1512 | /// ::[opt] nested-name-specifier template simple-template-id :: | |||
1513 | /// ~type-name | |||
1514 | /// ::[opt] nested-name-specifier[opt] ~type-name | |||
1515 | /// | |||
1516 | ExprResult | |||
1517 | Parser::ParseCXXPseudoDestructor(Expr *Base, SourceLocation OpLoc, | |||
1518 | tok::TokenKind OpKind, | |||
1519 | CXXScopeSpec &SS, | |||
1520 | ParsedType ObjectType) { | |||
1521 | // We're parsing either a pseudo-destructor-name or a dependent | |||
1522 | // member access that has the same form as a | |||
1523 | // pseudo-destructor-name. We parse both in the same way and let | |||
1524 | // the action model sort them out. | |||
1525 | // | |||
1526 | // Note that the ::[opt] nested-name-specifier[opt] has already | |||
1527 | // been parsed, and if there was a simple-template-id, it has | |||
1528 | // been coalesced into a template-id annotation token. | |||
1529 | UnqualifiedId FirstTypeName; | |||
1530 | SourceLocation CCLoc; | |||
1531 | if (Tok.is(tok::identifier)) { | |||
1532 | FirstTypeName.setIdentifier(Tok.getIdentifierInfo(), Tok.getLocation()); | |||
1533 | ConsumeToken(); | |||
1534 | assert(Tok.is(tok::coloncolon) &&"ParseOptionalCXXScopeSpecifier fail")((Tok.is(tok::coloncolon) &&"ParseOptionalCXXScopeSpecifier fail" ) ? static_cast<void> (0) : __assert_fail ("Tok.is(tok::coloncolon) &&\"ParseOptionalCXXScopeSpecifier fail\"" , "/build/llvm-toolchain-snapshot-8~svn345461/tools/clang/lib/Parse/ParseExprCXX.cpp" , 1534, __PRETTY_FUNCTION__)); | |||
1535 | CCLoc = ConsumeToken(); | |||
1536 | } else if (Tok.is(tok::annot_template_id)) { | |||
1537 | // FIXME: retrieve TemplateKWLoc from template-id annotation and | |||
1538 | // store it in the pseudo-dtor node (to be used when instantiating it). | |||
1539 | FirstTypeName.setTemplateId( | |||
1540 | (TemplateIdAnnotation *)Tok.getAnnotationValue()); | |||
1541 | ConsumeAnnotationToken(); | |||
1542 | assert(Tok.is(tok::coloncolon) &&"ParseOptionalCXXScopeSpecifier fail")((Tok.is(tok::coloncolon) &&"ParseOptionalCXXScopeSpecifier fail" ) ? static_cast<void> (0) : __assert_fail ("Tok.is(tok::coloncolon) &&\"ParseOptionalCXXScopeSpecifier fail\"" , "/build/llvm-toolchain-snapshot-8~svn345461/tools/clang/lib/Parse/ParseExprCXX.cpp" , 1542, __PRETTY_FUNCTION__)); | |||
1543 | CCLoc = ConsumeToken(); | |||
1544 | } else { | |||
1545 | FirstTypeName.setIdentifier(nullptr, SourceLocation()); | |||
1546 | } | |||
1547 | ||||
1548 | // Parse the tilde. | |||
1549 | assert(Tok.is(tok::tilde) && "ParseOptionalCXXScopeSpecifier fail")((Tok.is(tok::tilde) && "ParseOptionalCXXScopeSpecifier fail" ) ? static_cast<void> (0) : __assert_fail ("Tok.is(tok::tilde) && \"ParseOptionalCXXScopeSpecifier fail\"" , "/build/llvm-toolchain-snapshot-8~svn345461/tools/clang/lib/Parse/ParseExprCXX.cpp" , 1549, __PRETTY_FUNCTION__)); | |||
1550 | SourceLocation TildeLoc = ConsumeToken(); | |||
1551 | ||||
1552 | if (Tok.is(tok::kw_decltype) && !FirstTypeName.isValid() && SS.isEmpty()) { | |||
1553 | DeclSpec DS(AttrFactory); | |||
1554 | ParseDecltypeSpecifier(DS); | |||
1555 | if (DS.getTypeSpecType() == TST_error) | |||
1556 | return ExprError(); | |||
1557 | return Actions.ActOnPseudoDestructorExpr(getCurScope(), Base, OpLoc, OpKind, | |||
1558 | TildeLoc, DS); | |||
1559 | } | |||
1560 | ||||
1561 | if (!Tok.is(tok::identifier)) { | |||
1562 | Diag(Tok, diag::err_destructor_tilde_identifier); | |||
1563 | return ExprError(); | |||
1564 | } | |||
1565 | ||||
1566 | // Parse the second type. | |||
1567 | UnqualifiedId SecondTypeName; | |||
1568 | IdentifierInfo *Name = Tok.getIdentifierInfo(); | |||
1569 | SourceLocation NameLoc = ConsumeToken(); | |||
1570 | SecondTypeName.setIdentifier(Name, NameLoc); | |||
1571 | ||||
1572 | // If there is a '<', the second type name is a template-id. Parse | |||
1573 | // it as such. | |||
1574 | if (Tok.is(tok::less) && | |||
1575 | ParseUnqualifiedIdTemplateId(SS, SourceLocation(), | |||
1576 | Name, NameLoc, | |||
1577 | false, ObjectType, SecondTypeName, | |||
1578 | /*AssumeTemplateName=*/true)) | |||
1579 | return ExprError(); | |||
1580 | ||||
1581 | return Actions.ActOnPseudoDestructorExpr(getCurScope(), Base, OpLoc, OpKind, | |||
1582 | SS, FirstTypeName, CCLoc, TildeLoc, | |||
1583 | SecondTypeName); | |||
1584 | } | |||
1585 | ||||
1586 | /// ParseCXXBoolLiteral - This handles the C++ Boolean literals. | |||
1587 | /// | |||
1588 | /// boolean-literal: [C++ 2.13.5] | |||
1589 | /// 'true' | |||
1590 | /// 'false' | |||
1591 | ExprResult Parser::ParseCXXBoolLiteral() { | |||
1592 | tok::TokenKind Kind = Tok.getKind(); | |||
1593 | return Actions.ActOnCXXBoolLiteral(ConsumeToken(), Kind); | |||
1594 | } | |||
1595 | ||||
1596 | /// ParseThrowExpression - This handles the C++ throw expression. | |||
1597 | /// | |||
1598 | /// throw-expression: [C++ 15] | |||
1599 | /// 'throw' assignment-expression[opt] | |||
1600 | ExprResult Parser::ParseThrowExpression() { | |||
1601 | assert(Tok.is(tok::kw_throw) && "Not throw!")((Tok.is(tok::kw_throw) && "Not throw!") ? static_cast <void> (0) : __assert_fail ("Tok.is(tok::kw_throw) && \"Not throw!\"" , "/build/llvm-toolchain-snapshot-8~svn345461/tools/clang/lib/Parse/ParseExprCXX.cpp" , 1601, __PRETTY_FUNCTION__)); | |||
1602 | SourceLocation ThrowLoc = ConsumeToken(); // Eat the throw token. | |||
1603 | ||||
1604 | // If the current token isn't the start of an assignment-expression, | |||
1605 | // then the expression is not present. This handles things like: | |||
1606 | // "C ? throw : (void)42", which is crazy but legal. | |||
1607 | switch (Tok.getKind()) { // FIXME: move this predicate somewhere common. | |||
1608 | case tok::semi: | |||
1609 | case tok::r_paren: | |||
1610 | case tok::r_square: | |||
1611 | case tok::r_brace: | |||
1612 | case tok::colon: | |||
1613 | case tok::comma: | |||
1614 | return Actions.ActOnCXXThrow(getCurScope(), ThrowLoc, nullptr); | |||
1615 | ||||
1616 | default: | |||
1617 | ExprResult Expr(ParseAssignmentExpression()); | |||
1618 | if (Expr.isInvalid()) return Expr; | |||
1619 | return Actions.ActOnCXXThrow(getCurScope(), ThrowLoc, Expr.get()); | |||
1620 | } | |||
1621 | } | |||
1622 | ||||
1623 | /// Parse the C++ Coroutines co_yield expression. | |||
1624 | /// | |||
1625 | /// co_yield-expression: | |||
1626 | /// 'co_yield' assignment-expression[opt] | |||
1627 | ExprResult Parser::ParseCoyieldExpression() { | |||
1628 | assert(Tok.is(tok::kw_co_yield) && "Not co_yield!")((Tok.is(tok::kw_co_yield) && "Not co_yield!") ? static_cast <void> (0) : __assert_fail ("Tok.is(tok::kw_co_yield) && \"Not co_yield!\"" , "/build/llvm-toolchain-snapshot-8~svn345461/tools/clang/lib/Parse/ParseExprCXX.cpp" , 1628, __PRETTY_FUNCTION__)); | |||
1629 | ||||
1630 | SourceLocation Loc = ConsumeToken(); | |||
1631 | ExprResult Expr = Tok.is(tok::l_brace) ? ParseBraceInitializer() | |||
1632 | : ParseAssignmentExpression(); | |||
1633 | if (!Expr.isInvalid()) | |||
1634 | Expr = Actions.ActOnCoyieldExpr(getCurScope(), Loc, Expr.get()); | |||
1635 | return Expr; | |||
1636 | } | |||
1637 | ||||
1638 | /// ParseCXXThis - This handles the C++ 'this' pointer. | |||
1639 | /// | |||
1640 | /// C++ 9.3.2: In the body of a non-static member function, the keyword this is | |||
1641 | /// a non-lvalue expression whose value is the address of the object for which | |||
1642 | /// the function is called. | |||
1643 | ExprResult Parser::ParseCXXThis() { | |||
1644 | assert(Tok.is(tok::kw_this) && "Not 'this'!")((Tok.is(tok::kw_this) && "Not 'this'!") ? static_cast <void> (0) : __assert_fail ("Tok.is(tok::kw_this) && \"Not 'this'!\"" , "/build/llvm-toolchain-snapshot-8~svn345461/tools/clang/lib/Parse/ParseExprCXX.cpp" , 1644, __PRETTY_FUNCTION__)); | |||
1645 | SourceLocation ThisLoc = ConsumeToken(); | |||
1646 | return Actions.ActOnCXXThis(ThisLoc); | |||
1647 | } | |||
1648 | ||||
1649 | /// ParseCXXTypeConstructExpression - Parse construction of a specified type. | |||
1650 | /// Can be interpreted either as function-style casting ("int(x)") | |||
1651 | /// or class type construction ("ClassType(x,y,z)") | |||
1652 | /// or creation of a value-initialized type ("int()"). | |||
1653 | /// See [C++ 5.2.3]. | |||
1654 | /// | |||
1655 | /// postfix-expression: [C++ 5.2p1] | |||
1656 | /// simple-type-specifier '(' expression-list[opt] ')' | |||
1657 | /// [C++0x] simple-type-specifier braced-init-list | |||
1658 | /// typename-specifier '(' expression-list[opt] ')' | |||
1659 | /// [C++0x] typename-specifier braced-init-list | |||
1660 | /// | |||
1661 | /// In C++1z onwards, the type specifier can also be a template-name. | |||
1662 | ExprResult | |||
1663 | Parser::ParseCXXTypeConstructExpression(const DeclSpec &DS) { | |||
1664 | Declarator DeclaratorInfo(DS, DeclaratorContext::FunctionalCastContext); | |||
1665 | ParsedType TypeRep = Actions.ActOnTypeName(getCurScope(), DeclaratorInfo).get(); | |||
1666 | ||||
1667 | assert((Tok.is(tok::l_paren) ||(((Tok.is(tok::l_paren) || (getLangOpts().CPlusPlus11 && Tok.is(tok::l_brace))) && "Expected '(' or '{'!") ? static_cast <void> (0) : __assert_fail ("(Tok.is(tok::l_paren) || (getLangOpts().CPlusPlus11 && Tok.is(tok::l_brace))) && \"Expected '(' or '{'!\"" , "/build/llvm-toolchain-snapshot-8~svn345461/tools/clang/lib/Parse/ParseExprCXX.cpp" , 1669, __PRETTY_FUNCTION__)) | |||
1668 | (getLangOpts().CPlusPlus11 && Tok.is(tok::l_brace)))(((Tok.is(tok::l_paren) || (getLangOpts().CPlusPlus11 && Tok.is(tok::l_brace))) && "Expected '(' or '{'!") ? static_cast <void> (0) : __assert_fail ("(Tok.is(tok::l_paren) || (getLangOpts().CPlusPlus11 && Tok.is(tok::l_brace))) && \"Expected '(' or '{'!\"" , "/build/llvm-toolchain-snapshot-8~svn345461/tools/clang/lib/Parse/ParseExprCXX.cpp" , 1669, __PRETTY_FUNCTION__)) | |||
1669 | && "Expected '(' or '{'!")(((Tok.is(tok::l_paren) || (getLangOpts().CPlusPlus11 && Tok.is(tok::l_brace))) && "Expected '(' or '{'!") ? static_cast <void> (0) : __assert_fail ("(Tok.is(tok::l_paren) || (getLangOpts().CPlusPlus11 && Tok.is(tok::l_brace))) && \"Expected '(' or '{'!\"" , "/build/llvm-toolchain-snapshot-8~svn345461/tools/clang/lib/Parse/ParseExprCXX.cpp" , 1669, __PRETTY_FUNCTION__)); | |||
1670 | ||||
1671 | if (Tok.is(tok::l_brace)) { | |||
1672 | ExprResult Init = ParseBraceInitializer(); | |||
1673 | if (Init.isInvalid()) | |||
1674 | return Init; | |||
1675 | Expr *InitList = Init.get(); | |||
1676 | return Actions.ActOnCXXTypeConstructExpr( | |||
1677 | TypeRep, InitList->getBeginLoc(), MultiExprArg(&InitList, 1), | |||
1678 | InitList->getEndLoc(), /*ListInitialization=*/true); | |||
1679 | } else { | |||
1680 | BalancedDelimiterTracker T(*this, tok::l_paren); | |||
1681 | T.consumeOpen(); | |||
1682 | ||||
1683 | ExprVector Exprs; | |||
1684 | CommaLocsTy CommaLocs; | |||
1685 | ||||
1686 | if (Tok.isNot(tok::r_paren)) { | |||
1687 | if (ParseExpressionList(Exprs, CommaLocs, [&] { | |||
1688 | QualType PreferredType = Actions.ProduceConstructorSignatureHelp( | |||
1689 | getCurScope(), TypeRep.get()->getCanonicalTypeInternal(), | |||
1690 | DS.getEndLoc(), Exprs, T.getOpenLocation()); | |||
1691 | CalledSignatureHelp = true; | |||
1692 | Actions.CodeCompleteExpression(getCurScope(), PreferredType); | |||
1693 | })) { | |||
1694 | if (PP.isCodeCompletionReached() && !CalledSignatureHelp) { | |||
1695 | Actions.ProduceConstructorSignatureHelp( | |||
1696 | getCurScope(), TypeRep.get()->getCanonicalTypeInternal(), | |||
1697 | DS.getEndLoc(), Exprs, T.getOpenLocation()); | |||
1698 | CalledSignatureHelp = true; | |||
1699 | } | |||
1700 | SkipUntil(tok::r_paren, StopAtSemi); | |||
1701 | return ExprError(); | |||
1702 | } | |||
1703 | } | |||
1704 | ||||
1705 | // Match the ')'. | |||
1706 | T.consumeClose(); | |||
1707 | ||||
1708 | // TypeRep could be null, if it references an invalid typedef. | |||
1709 | if (!TypeRep) | |||
1710 | return ExprError(); | |||
1711 | ||||
1712 | assert((Exprs.size() == 0 || Exprs.size()-1 == CommaLocs.size())&&(((Exprs.size() == 0 || Exprs.size()-1 == CommaLocs.size())&& "Unexpected number of commas!") ? static_cast<void> (0 ) : __assert_fail ("(Exprs.size() == 0 || Exprs.size()-1 == CommaLocs.size())&& \"Unexpected number of commas!\"" , "/build/llvm-toolchain-snapshot-8~svn345461/tools/clang/lib/Parse/ParseExprCXX.cpp" , 1713, __PRETTY_FUNCTION__)) | |||
1713 | "Unexpected number of commas!")(((Exprs.size() == 0 || Exprs.size()-1 == CommaLocs.size())&& "Unexpected number of commas!") ? static_cast<void> (0 ) : __assert_fail ("(Exprs.size() == 0 || Exprs.size()-1 == CommaLocs.size())&& \"Unexpected number of commas!\"" , "/build/llvm-toolchain-snapshot-8~svn345461/tools/clang/lib/Parse/ParseExprCXX.cpp" , 1713, __PRETTY_FUNCTION__)); | |||
1714 | return Actions.ActOnCXXTypeConstructExpr(TypeRep, T.getOpenLocation(), | |||
1715 | Exprs, T.getCloseLocation(), | |||
1716 | /*ListInitialization=*/false); | |||
1717 | } | |||
1718 | } | |||
1719 | ||||
1720 | /// ParseCXXCondition - if/switch/while condition expression. | |||
1721 | /// | |||
1722 | /// condition: | |||
1723 | /// expression | |||
1724 | /// type-specifier-seq declarator '=' assignment-expression | |||
1725 | /// [C++11] type-specifier-seq declarator '=' initializer-clause | |||
1726 | /// [C++11] type-specifier-seq declarator braced-init-list | |||
1727 | /// [Clang] type-specifier-seq ref-qualifier[opt] '[' identifier-list ']' | |||
1728 | /// brace-or-equal-initializer | |||
1729 | /// [GNU] type-specifier-seq declarator simple-asm-expr[opt] attributes[opt] | |||
1730 | /// '=' assignment-expression | |||
1731 | /// | |||
1732 | /// In C++1z, a condition may in some contexts be preceded by an | |||
1733 | /// optional init-statement. This function will parse that too. | |||
1734 | /// | |||
1735 | /// \param InitStmt If non-null, an init-statement is permitted, and if present | |||
1736 | /// will be parsed and stored here. | |||
1737 | /// | |||
1738 | /// \param Loc The location of the start of the statement that requires this | |||
1739 | /// condition, e.g., the "for" in a for loop. | |||
1740 | /// | |||
1741 | /// \param FRI If non-null, a for range declaration is permitted, and if | |||
1742 | /// present will be parsed and stored here, and a null result will be returned. | |||
1743 | /// | |||
1744 | /// \returns The parsed condition. | |||
1745 | Sema::ConditionResult Parser::ParseCXXCondition(StmtResult *InitStmt, | |||
1746 | SourceLocation Loc, | |||
1747 | Sema::ConditionKind CK, | |||
1748 | ForRangeInfo *FRI) { | |||
1749 | ParenBraceBracketBalancer BalancerRAIIObj(*this); | |||
1750 | ||||
1751 | if (Tok.is(tok::code_completion)) { | |||
| ||||
1752 | Actions.CodeCompleteOrdinaryName(getCurScope(), Sema::PCC_Condition); | |||
1753 | cutOffParsing(); | |||
1754 | return Sema::ConditionError(); | |||
1755 | } | |||
1756 | ||||
1757 | ParsedAttributesWithRange attrs(AttrFactory); | |||
1758 | MaybeParseCXX11Attributes(attrs); | |||
1759 | ||||
1760 | const auto WarnOnInit = [this, &CK] { | |||
1761 | Diag(Tok.getLocation(), getLangOpts().CPlusPlus17 | |||
1762 | ? diag::warn_cxx14_compat_init_statement | |||
1763 | : diag::ext_init_statement) | |||
1764 | << (CK == Sema::ConditionKind::Switch); | |||
1765 | }; | |||
1766 | ||||
1767 | // Determine what kind of thing we have. | |||
1768 | switch (isCXXConditionDeclarationOrInitStatement(InitStmt, FRI)) { | |||
1769 | case ConditionOrInitStatement::Expression: { | |||
1770 | ProhibitAttributes(attrs); | |||
1771 | ||||
1772 | // We can have an empty expression here. | |||
1773 | // if (; true); | |||
1774 | if (InitStmt && Tok.is(tok::semi)) { | |||
1775 | WarnOnInit(); | |||
1776 | SourceLocation SemiLoc = ConsumeToken(); | |||
1777 | *InitStmt = Actions.ActOnNullStmt(SemiLoc); | |||
1778 | return ParseCXXCondition(nullptr, Loc, CK); | |||
1779 | } | |||
1780 | ||||
1781 | // Parse the expression. | |||
1782 | ExprResult Expr = ParseExpression(); // expression | |||
1783 | if (Expr.isInvalid()) | |||
1784 | return Sema::ConditionError(); | |||
1785 | ||||
1786 | if (InitStmt && Tok.is(tok::semi)) { | |||
1787 | WarnOnInit(); | |||
1788 | *InitStmt = Actions.ActOnExprStmt(Expr.get()); | |||
1789 | ConsumeToken(); | |||
1790 | return ParseCXXCondition(nullptr, Loc, CK); | |||
1791 | } | |||
1792 | ||||
1793 | return Actions.ActOnCondition(getCurScope(), Loc, Expr.get(), CK); | |||
1794 | } | |||
1795 | ||||
1796 | case ConditionOrInitStatement::InitStmtDecl: { | |||
1797 | WarnOnInit(); | |||
1798 | SourceLocation DeclStart = Tok.getLocation(), DeclEnd; | |||
1799 | DeclGroupPtrTy DG = | |||
1800 | ParseSimpleDeclaration(DeclaratorContext::InitStmtContext, DeclEnd, | |||
1801 | attrs, /*RequireSemi=*/true); | |||
1802 | *InitStmt = Actions.ActOnDeclStmt(DG, DeclStart, DeclEnd); | |||
| ||||
1803 | return ParseCXXCondition(nullptr, Loc, CK); | |||
1804 | } | |||
1805 | ||||
1806 | case ConditionOrInitStatement::ForRangeDecl: { | |||
1807 | assert(FRI && "should not parse a for range declaration here")((FRI && "should not parse a for range declaration here" ) ? static_cast<void> (0) : __assert_fail ("FRI && \"should not parse a for range declaration here\"" , "/build/llvm-toolchain-snapshot-8~svn345461/tools/clang/lib/Parse/ParseExprCXX.cpp" , 1807, __PRETTY_FUNCTION__)); | |||
1808 | SourceLocation DeclStart = Tok.getLocation(), DeclEnd; | |||
1809 | DeclGroupPtrTy DG = ParseSimpleDeclaration( | |||
1810 | DeclaratorContext::ForContext, DeclEnd, attrs, false, FRI); | |||
1811 | FRI->LoopVar = Actions.ActOnDeclStmt(DG, DeclStart, Tok.getLocation()); | |||
1812 | return Sema::ConditionResult(); | |||
1813 | } | |||
1814 | ||||
1815 | case ConditionOrInitStatement::ConditionDecl: | |||
1816 | case ConditionOrInitStatement::Error: | |||
1817 | break; | |||
1818 | } | |||
1819 | ||||
1820 | // type-specifier-seq | |||
1821 | DeclSpec DS(AttrFactory); | |||
1822 | DS.takeAttributesFrom(attrs); | |||
1823 | ParseSpecifierQualifierList(DS, AS_none, DeclSpecContext::DSC_condition); | |||
1824 | ||||
1825 | // declarator | |||
1826 | Declarator DeclaratorInfo(DS, DeclaratorContext::ConditionContext); | |||
1827 | ParseDeclarator(DeclaratorInfo); | |||
1828 | ||||
1829 | // simple-asm-expr[opt] | |||
1830 | if (Tok.is(tok::kw_asm)) { | |||
1831 | SourceLocation Loc; | |||
1832 | ExprResult AsmLabel(ParseSimpleAsm(&Loc)); | |||
1833 | if (AsmLabel.isInvalid()) { | |||
1834 | SkipUntil(tok::semi, StopAtSemi); | |||
1835 | return Sema::ConditionError(); | |||
1836 | } | |||
1837 | DeclaratorInfo.setAsmLabel(AsmLabel.get()); | |||
1838 | DeclaratorInfo.SetRangeEnd(Loc); | |||
1839 | } | |||
1840 | ||||
1841 | // If attributes are present, parse them. | |||
1842 | MaybeParseGNUAttributes(DeclaratorInfo); | |||
1843 | ||||
1844 | // Type-check the declaration itself. | |||
1845 | DeclResult Dcl = Actions.ActOnCXXConditionDeclaration(getCurScope(), | |||
1846 | DeclaratorInfo); | |||
1847 | if (Dcl.isInvalid()) | |||
1848 | return Sema::ConditionError(); | |||
1849 | Decl *DeclOut = Dcl.get(); | |||
1850 | ||||
1851 | // '=' assignment-expression | |||
1852 | // If a '==' or '+=' is found, suggest a fixit to '='. | |||
1853 | bool CopyInitialization = isTokenEqualOrEqualTypo(); | |||
1854 | if (CopyInitialization) | |||
1855 | ConsumeToken(); | |||
1856 | ||||
1857 | ExprResult InitExpr = ExprError(); | |||
1858 | if (getLangOpts().CPlusPlus11 && Tok.is(tok::l_brace)) { | |||
1859 | Diag(Tok.getLocation(), | |||
1860 | diag::warn_cxx98_compat_generalized_initializer_lists); | |||
1861 | InitExpr = ParseBraceInitializer(); | |||
1862 | } else if (CopyInitialization) { | |||
1863 | InitExpr = ParseAssignmentExpression(); | |||
1864 | } else if (Tok.is(tok::l_paren)) { | |||
1865 | // This was probably an attempt to initialize the variable. | |||
1866 | SourceLocation LParen = ConsumeParen(), RParen = LParen; | |||
1867 | if (SkipUntil(tok::r_paren, StopAtSemi | StopBeforeMatch)) | |||
1868 | RParen = ConsumeParen(); | |||
1869 | Diag(DeclOut->getLocation(), | |||
1870 | diag::err_expected_init_in_condition_lparen) | |||
1871 | << SourceRange(LParen, RParen); | |||
1872 | } else { | |||
1873 | Diag(DeclOut->getLocation(), diag::err_expected_init_in_condition); | |||
1874 | } | |||
1875 | ||||
1876 | if (!InitExpr.isInvalid()) | |||
1877 | Actions.AddInitializerToDecl(DeclOut, InitExpr.get(), !CopyInitialization); | |||
1878 | else | |||
1879 | Actions.ActOnInitializerError(DeclOut); | |||
1880 | ||||
1881 | Actions.FinalizeDeclaration(DeclOut); | |||
1882 | return Actions.ActOnConditionVariable(DeclOut, Loc, CK); | |||
1883 | } | |||
1884 | ||||
1885 | /// ParseCXXSimpleTypeSpecifier - [C++ 7.1.5.2] Simple type specifiers. | |||
1886 | /// This should only be called when the current token is known to be part of | |||
1887 | /// simple-type-specifier. | |||
1888 | /// | |||
1889 | /// simple-type-specifier: | |||
1890 | /// '::'[opt] nested-name-specifier[opt] type-name | |||
1891 | /// '::'[opt] nested-name-specifier 'template' simple-template-id [TODO] | |||
1892 | /// char | |||
1893 | /// wchar_t | |||
1894 | /// bool | |||
1895 | /// short | |||
1896 | /// int | |||
1897 | /// long | |||
1898 | /// signed | |||
1899 | /// unsigned | |||
1900 | /// float | |||
1901 | /// double | |||
1902 | /// void | |||
1903 | /// [GNU] typeof-specifier | |||
1904 | /// [C++0x] auto [TODO] | |||
1905 | /// | |||
1906 | /// type-name: | |||
1907 | /// class-name | |||
1908 | /// enum-name | |||
1909 | /// typedef-name | |||
1910 | /// | |||
1911 | void Parser::ParseCXXSimpleTypeSpecifier(DeclSpec &DS) { | |||
1912 | DS.SetRangeStart(Tok.getLocation()); | |||
1913 | const char *PrevSpec; | |||
1914 | unsigned DiagID; | |||
1915 | SourceLocation Loc = Tok.getLocation(); | |||
1916 | const clang::PrintingPolicy &Policy = | |||
1917 | Actions.getASTContext().getPrintingPolicy(); | |||
1918 | ||||
1919 | switch (Tok.getKind()) { | |||
1920 | case tok::identifier: // foo::bar | |||
1921 | case tok::coloncolon: // ::foo::bar | |||
1922 | llvm_unreachable("Annotation token should already be formed!")::llvm::llvm_unreachable_internal("Annotation token should already be formed!" , "/build/llvm-toolchain-snapshot-8~svn345461/tools/clang/lib/Parse/ParseExprCXX.cpp" , 1922); | |||
1923 | default: | |||
1924 | llvm_unreachable("Not a simple-type-specifier token!")::llvm::llvm_unreachable_internal("Not a simple-type-specifier token!" , "/build/llvm-toolchain-snapshot-8~svn345461/tools/clang/lib/Parse/ParseExprCXX.cpp" , 1924); | |||
1925 | ||||
1926 | // type-name | |||
1927 | case tok::annot_typename: { | |||
1928 | if (getTypeAnnotation(Tok)) | |||
1929 | DS.SetTypeSpecType(DeclSpec::TST_typename, Loc, PrevSpec, DiagID, | |||
1930 | getTypeAnnotation(Tok), Policy); | |||
1931 | else | |||
1932 | DS.SetTypeSpecError(); | |||
1933 | ||||
1934 | DS.SetRangeEnd(Tok.getAnnotationEndLoc()); | |||
1935 | ConsumeAnnotationToken(); | |||
1936 | ||||
1937 | DS.Finish(Actions, Policy); | |||
1938 | return; | |||
1939 | } | |||
1940 | ||||
1941 | // builtin types | |||
1942 | case tok::kw_short: | |||
1943 | DS.SetTypeSpecWidth(DeclSpec::TSW_short, Loc, PrevSpec, DiagID, Policy); | |||
1944 | break; | |||
1945 | case tok::kw_long: | |||
1946 | DS.SetTypeSpecWidth(DeclSpec::TSW_long, Loc, PrevSpec, DiagID, Policy); | |||
1947 | break; | |||
1948 | case tok::kw___int64: | |||
1949 | DS.SetTypeSpecWidth(DeclSpec::TSW_longlong, Loc, PrevSpec, DiagID, Policy); | |||
1950 | break; | |||
1951 | case tok::kw_signed: | |||
1952 | DS.SetTypeSpecSign(DeclSpec::TSS_signed, Loc, PrevSpec, DiagID); | |||
1953 | break; | |||
1954 | case tok::kw_unsigned: | |||
1955 | DS.SetTypeSpecSign(DeclSpec::TSS_unsigned, Loc, PrevSpec, DiagID); | |||
1956 | break; | |||
1957 | case tok::kw_void: | |||
1958 | DS.SetTypeSpecType(DeclSpec::TST_void, Loc, PrevSpec, DiagID, Policy); | |||
1959 | break; | |||
1960 | case tok::kw_char: | |||
1961 | DS.SetTypeSpecType(DeclSpec::TST_char, Loc, PrevSpec, DiagID, Policy); | |||
1962 | break; | |||
1963 | case tok::kw_int: | |||
1964 | DS.SetTypeSpecType(DeclSpec::TST_int, Loc, PrevSpec, DiagID, Policy); | |||
1965 | break; | |||
1966 | case tok::kw___int128: | |||
1967 | DS.SetTypeSpecType(DeclSpec::TST_int128, Loc, PrevSpec, DiagID, Policy); | |||
1968 | break; | |||
1969 | case tok::kw_half: | |||
1970 | DS.SetTypeSpecType(DeclSpec::TST_half, Loc, PrevSpec, DiagID, Policy); | |||
1971 | break; | |||
1972 | case tok::kw_float: | |||
1973 | DS.SetTypeSpecType(DeclSpec::TST_float, Loc, PrevSpec, DiagID, Policy); | |||
1974 | break; | |||
1975 | case tok::kw_double: | |||
1976 | DS.SetTypeSpecType(DeclSpec::TST_double, Loc, PrevSpec, DiagID, Policy); | |||
1977 | break; | |||
1978 | case tok::kw__Float16: | |||
1979 | DS.SetTypeSpecType(DeclSpec::TST_float16, Loc, PrevSpec, DiagID, Policy); | |||
1980 | break; | |||
1981 | case tok::kw___float128: | |||
1982 | DS.SetTypeSpecType(DeclSpec::TST_float128, Loc, PrevSpec, DiagID, Policy); | |||
1983 | break; | |||
1984 | case tok::kw_wchar_t: | |||
1985 | DS.SetTypeSpecType(DeclSpec::TST_wchar, Loc, PrevSpec, DiagID, Policy); | |||
1986 | break; | |||
1987 | case tok::kw_char8_t: | |||
1988 | DS.SetTypeSpecType(DeclSpec::TST_char8, Loc, PrevSpec, DiagID, Policy); | |||
1989 | break; | |||
1990 | case tok::kw_char16_t: | |||
1991 | DS.SetTypeSpecType(DeclSpec::TST_char16, Loc, PrevSpec, DiagID, Policy); | |||
1992 | break; | |||
1993 | case tok::kw_char32_t: | |||
1994 | DS.SetTypeSpecType(DeclSpec::TST_char32, Loc, PrevSpec, DiagID, Policy); | |||
1995 | break; | |||
1996 | case tok::kw_bool: | |||
1997 | DS.SetTypeSpecType(DeclSpec::TST_bool, Loc, PrevSpec, DiagID, Policy); | |||
1998 | break; | |||
1999 | case tok::annot_decltype: | |||
2000 | case tok::kw_decltype: | |||
2001 | DS.SetRangeEnd(ParseDecltypeSpecifier(DS)); | |||
2002 | return DS.Finish(Actions, Policy); | |||
2003 | ||||
2004 | // GNU typeof support. | |||
2005 | case tok::kw_typeof: | |||
2006 | ParseTypeofSpecifier(DS); | |||
2007 | DS.Finish(Actions, Policy); | |||
2008 | return; | |||
2009 | } | |||
2010 | ConsumeAnyToken(); | |||
2011 | DS.SetRangeEnd(PrevTokLocation); | |||
2012 | DS.Finish(Actions, Policy); | |||
2013 | } | |||
2014 | ||||
2015 | /// ParseCXXTypeSpecifierSeq - Parse a C++ type-specifier-seq (C++ | |||
2016 | /// [dcl.name]), which is a non-empty sequence of type-specifiers, | |||
2017 | /// e.g., "const short int". Note that the DeclSpec is *not* finished | |||
2018 | /// by parsing the type-specifier-seq, because these sequences are | |||
2019 | /// typically followed by some form of declarator. Returns true and | |||
2020 | /// emits diagnostics if this is not a type-specifier-seq, false | |||
2021 | /// otherwise. | |||
2022 | /// | |||
2023 | /// type-specifier-seq: [C++ 8.1] | |||
2024 | /// type-specifier type-specifier-seq[opt] | |||
2025 | /// | |||
2026 | bool Parser::ParseCXXTypeSpecifierSeq(DeclSpec &DS) { | |||
2027 | ParseSpecifierQualifierList(DS, AS_none, DeclSpecContext::DSC_type_specifier); | |||
2028 | DS.Finish(Actions, Actions.getASTContext().getPrintingPolicy()); | |||
2029 | return false; | |||
2030 | } | |||
2031 | ||||
2032 | /// Finish parsing a C++ unqualified-id that is a template-id of | |||
2033 | /// some form. | |||
2034 | /// | |||
2035 | /// This routine is invoked when a '<' is encountered after an identifier or | |||
2036 | /// operator-function-id is parsed by \c ParseUnqualifiedId() to determine | |||
2037 | /// whether the unqualified-id is actually a template-id. This routine will | |||
2038 | /// then parse the template arguments and form the appropriate template-id to | |||
2039 | /// return to the caller. | |||
2040 | /// | |||
2041 | /// \param SS the nested-name-specifier that precedes this template-id, if | |||
2042 | /// we're actually parsing a qualified-id. | |||
2043 | /// | |||
2044 | /// \param Name for constructor and destructor names, this is the actual | |||
2045 | /// identifier that may be a template-name. | |||
2046 | /// | |||
2047 | /// \param NameLoc the location of the class-name in a constructor or | |||
2048 | /// destructor. | |||
2049 | /// | |||
2050 | /// \param EnteringContext whether we're entering the scope of the | |||
2051 | /// nested-name-specifier. | |||
2052 | /// | |||
2053 | /// \param ObjectType if this unqualified-id occurs within a member access | |||
2054 | /// expression, the type of the base object whose member is being accessed. | |||
2055 | /// | |||
2056 | /// \param Id as input, describes the template-name or operator-function-id | |||
2057 | /// that precedes the '<'. If template arguments were parsed successfully, | |||
2058 | /// will be updated with the template-id. | |||
2059 | /// | |||
2060 | /// \param AssumeTemplateId When true, this routine will assume that the name | |||
2061 | /// refers to a template without performing name lookup to verify. | |||
2062 | /// | |||
2063 | /// \returns true if a parse error occurred, false otherwise. | |||
2064 | bool Parser::ParseUnqualifiedIdTemplateId(CXXScopeSpec &SS, | |||
2065 | SourceLocation TemplateKWLoc, | |||
2066 | IdentifierInfo *Name, | |||
2067 | SourceLocation NameLoc, | |||
2068 | bool EnteringContext, | |||
2069 | ParsedType ObjectType, | |||
2070 | UnqualifiedId &Id, | |||
2071 | bool AssumeTemplateId) { | |||
2072 | assert(Tok.is(tok::less) && "Expected '<' to finish parsing a template-id")((Tok.is(tok::less) && "Expected '<' to finish parsing a template-id" ) ? static_cast<void> (0) : __assert_fail ("Tok.is(tok::less) && \"Expected '<' to finish parsing a template-id\"" , "/build/llvm-toolchain-snapshot-8~svn345461/tools/clang/lib/Parse/ParseExprCXX.cpp" , 2072, __PRETTY_FUNCTION__)); | |||
2073 | ||||
2074 | TemplateTy Template; | |||
2075 | TemplateNameKind TNK = TNK_Non_template; | |||
2076 | switch (Id.getKind()) { | |||
2077 | case UnqualifiedIdKind::IK_Identifier: | |||
2078 | case UnqualifiedIdKind::IK_OperatorFunctionId: | |||
2079 | case UnqualifiedIdKind::IK_LiteralOperatorId: | |||
2080 | if (AssumeTemplateId) { | |||
2081 | // We defer the injected-class-name checks until we've found whether | |||
2082 | // this template-id is used to form a nested-name-specifier or not. | |||
2083 | TNK = Actions.ActOnDependentTemplateName( | |||
2084 | getCurScope(), SS, TemplateKWLoc, Id, ObjectType, EnteringContext, | |||
2085 | Template, /*AllowInjectedClassName*/ true); | |||
2086 | if (TNK == TNK_Non_template) | |||
2087 | return true; | |||
2088 | } else { | |||
2089 | bool MemberOfUnknownSpecialization; | |||
2090 | TNK = Actions.isTemplateName(getCurScope(), SS, | |||
2091 | TemplateKWLoc.isValid(), Id, | |||
2092 | ObjectType, EnteringContext, Template, | |||
2093 | MemberOfUnknownSpecialization); | |||
2094 | ||||
2095 | if (TNK == TNK_Non_template && MemberOfUnknownSpecialization && | |||
2096 | ObjectType && IsTemplateArgumentList()) { | |||
2097 | // We have something like t->getAs<T>(), where getAs is a | |||
2098 | // member of an unknown specialization. However, this will only | |||
2099 | // parse correctly as a template, so suggest the keyword 'template' | |||
2100 | // before 'getAs' and treat this as a dependent template name. | |||
2101 | std::string Name; | |||
2102 | if (Id.getKind() == UnqualifiedIdKind::IK_Identifier) | |||
2103 | Name = Id.Identifier->getName(); | |||
2104 | else { | |||
2105 | Name = "operator "; | |||
2106 | if (Id.getKind() == UnqualifiedIdKind::IK_OperatorFunctionId) | |||
2107 | Name += getOperatorSpelling(Id.OperatorFunctionId.Operator); | |||
2108 | else | |||
2109 | Name += Id.Identifier->getName(); | |||
2110 | } | |||
2111 | Diag(Id.StartLocation, diag::err_missing_dependent_template_keyword) | |||
2112 | << Name | |||
2113 | << FixItHint::CreateInsertion(Id.StartLocation, "template "); | |||
2114 | TNK = Actions.ActOnDependentTemplateName( | |||
2115 | getCurScope(), SS, TemplateKWLoc, Id, ObjectType, EnteringContext, | |||
2116 | Template, /*AllowInjectedClassName*/ true); | |||
2117 | if (TNK == TNK_Non_template) | |||
2118 | return true; | |||
2119 | } | |||
2120 | } | |||
2121 | break; | |||
2122 | ||||
2123 | case UnqualifiedIdKind::IK_ConstructorName: { | |||
2124 | UnqualifiedId TemplateName; | |||
2125 | bool MemberOfUnknownSpecialization; | |||
2126 | TemplateName.setIdentifier(Name, NameLoc); | |||
2127 | TNK = Actions.isTemplateName(getCurScope(), SS, TemplateKWLoc.isValid(), | |||
2128 | TemplateName, ObjectType, | |||
2129 | EnteringContext, Template, | |||
2130 | MemberOfUnknownSpecialization); | |||
2131 | break; | |||
2132 | } | |||
2133 | ||||
2134 | case UnqualifiedIdKind::IK_DestructorName: { | |||
2135 | UnqualifiedId TemplateName; | |||
2136 | bool MemberOfUnknownSpecialization; | |||
2137 | TemplateName.setIdentifier(Name, NameLoc); | |||
2138 | if (ObjectType) { | |||
2139 | TNK = Actions.ActOnDependentTemplateName( | |||
2140 | getCurScope(), SS, TemplateKWLoc, TemplateName, ObjectType, | |||
2141 | EnteringContext, Template, /*AllowInjectedClassName*/ true); | |||
2142 | if (TNK == TNK_Non_template) | |||
2143 | return true; | |||
2144 | } else { | |||
2145 | TNK = Actions.isTemplateName(getCurScope(), SS, TemplateKWLoc.isValid(), | |||
2146 | TemplateName, ObjectType, | |||
2147 | EnteringContext, Template, | |||
2148 | MemberOfUnknownSpecialization); | |||
2149 | ||||
2150 | if (TNK == TNK_Non_template && !Id.DestructorName.get()) { | |||
2151 | Diag(NameLoc, diag::err_destructor_template_id) | |||
2152 | << Name << SS.getRange(); | |||
2153 | return true; | |||
2154 | } | |||
2155 | } | |||
2156 | break; | |||
2157 | } | |||
2158 | ||||
2159 | default: | |||
2160 | return false; | |||
2161 | } | |||
2162 | ||||
2163 | if (TNK == TNK_Non_template) | |||
2164 | return false; | |||
2165 | ||||
2166 | // Parse the enclosed template argument list. | |||
2167 | SourceLocation LAngleLoc, RAngleLoc; | |||
2168 | TemplateArgList TemplateArgs; | |||
2169 | if (ParseTemplateIdAfterTemplateName(true, LAngleLoc, TemplateArgs, | |||
2170 | RAngleLoc)) | |||
2171 | return true; | |||
2172 | ||||
2173 | if (Id.getKind() == UnqualifiedIdKind::IK_Identifier || | |||
2174 | Id.getKind() == UnqualifiedIdKind::IK_OperatorFunctionId || | |||
2175 | Id.getKind() == UnqualifiedIdKind::IK_LiteralOperatorId) { | |||
2176 | // Form a parsed representation of the template-id to be stored in the | |||
2177 | // UnqualifiedId. | |||
2178 | ||||
2179 | // FIXME: Store name for literal operator too. | |||
2180 | IdentifierInfo *TemplateII = | |||
2181 | Id.getKind() == UnqualifiedIdKind::IK_Identifier ? Id.Identifier | |||
2182 | : nullptr; | |||
2183 | OverloadedOperatorKind OpKind = | |||
2184 | Id.getKind() == UnqualifiedIdKind::IK_Identifier | |||
2185 | ? OO_None | |||
2186 | : Id.OperatorFunctionId.Operator; | |||
2187 | ||||
2188 | TemplateIdAnnotation *TemplateId = TemplateIdAnnotation::Create( | |||
2189 | SS, TemplateKWLoc, Id.StartLocation, TemplateII, OpKind, Template, TNK, | |||
2190 | LAngleLoc, RAngleLoc, TemplateArgs, TemplateIds); | |||
2191 | ||||
2192 | Id.setTemplateId(TemplateId); | |||
2193 | return false; | |||
2194 | } | |||
2195 | ||||
2196 | // Bundle the template arguments together. | |||
2197 | ASTTemplateArgsPtr TemplateArgsPtr(TemplateArgs); | |||
2198 | ||||
2199 | // Constructor and destructor names. | |||
2200 | TypeResult Type | |||
2201 | = Actions.ActOnTemplateIdType(SS, TemplateKWLoc, | |||
2202 | Template, Name, NameLoc, | |||
2203 | LAngleLoc, TemplateArgsPtr, RAngleLoc, | |||
2204 | /*IsCtorOrDtorName=*/true); | |||
2205 | if (Type.isInvalid()) | |||
2206 | return true; | |||
2207 | ||||
2208 | if (Id.getKind() == UnqualifiedIdKind::IK_ConstructorName) | |||
2209 | Id.setConstructorName(Type.get(), NameLoc, RAngleLoc); | |||
2210 | else | |||
2211 | Id.setDestructorName(Id.StartLocation, Type.get(), RAngleLoc); | |||
2212 | ||||
2213 | return false; | |||
2214 | } | |||
2215 | ||||
2216 | /// Parse an operator-function-id or conversion-function-id as part | |||
2217 | /// of a C++ unqualified-id. | |||
2218 | /// | |||
2219 | /// This routine is responsible only for parsing the operator-function-id or | |||
2220 | /// conversion-function-id; it does not handle template arguments in any way. | |||
2221 | /// | |||
2222 | /// \code | |||
2223 | /// operator-function-id: [C++ 13.5] | |||
2224 | /// 'operator' operator | |||
2225 | /// | |||
2226 | /// operator: one of | |||
2227 | /// new delete new[] delete[] | |||
2228 | /// + - * / % ^ & | ~ | |||
2229 | /// ! = < > += -= *= /= %= | |||
2230 | /// ^= &= |= << >> >>= <<= == != | |||
2231 | /// <= >= && || ++ -- , ->* -> | |||
2232 | /// () [] <=> | |||
2233 | /// | |||
2234 | /// conversion-function-id: [C++ 12.3.2] | |||
2235 | /// operator conversion-type-id | |||
2236 | /// | |||
2237 | /// conversion-type-id: | |||
2238 | /// type-specifier-seq conversion-declarator[opt] | |||
2239 | /// | |||
2240 | /// conversion-declarator: | |||
2241 | /// ptr-operator conversion-declarator[opt] | |||
2242 | /// \endcode | |||
2243 | /// | |||
2244 | /// \param SS The nested-name-specifier that preceded this unqualified-id. If | |||
2245 | /// non-empty, then we are parsing the unqualified-id of a qualified-id. | |||
2246 | /// | |||
2247 | /// \param EnteringContext whether we are entering the scope of the | |||
2248 | /// nested-name-specifier. | |||
2249 | /// | |||
2250 | /// \param ObjectType if this unqualified-id occurs within a member access | |||
2251 | /// expression, the type of the base object whose member is being accessed. | |||
2252 | /// | |||
2253 | /// \param Result on a successful parse, contains the parsed unqualified-id. | |||
2254 | /// | |||
2255 | /// \returns true if parsing fails, false otherwise. | |||
2256 | bool Parser::ParseUnqualifiedIdOperator(CXXScopeSpec &SS, bool EnteringContext, | |||
2257 | ParsedType ObjectType, | |||
2258 | UnqualifiedId &Result) { | |||
2259 | assert(Tok.is(tok::kw_operator) && "Expected 'operator' keyword")((Tok.is(tok::kw_operator) && "Expected 'operator' keyword" ) ? static_cast<void> (0) : __assert_fail ("Tok.is(tok::kw_operator) && \"Expected 'operator' keyword\"" , "/build/llvm-toolchain-snapshot-8~svn345461/tools/clang/lib/Parse/ParseExprCXX.cpp" , 2259, __PRETTY_FUNCTION__)); | |||
2260 | ||||
2261 | // Consume the 'operator' keyword. | |||
2262 | SourceLocation KeywordLoc = ConsumeToken(); | |||
2263 | ||||
2264 | // Determine what kind of operator name we have. | |||
2265 | unsigned SymbolIdx = 0; | |||
2266 | SourceLocation SymbolLocations[3]; | |||
2267 | OverloadedOperatorKind Op = OO_None; | |||
2268 | switch (Tok.getKind()) { | |||
2269 | case tok::kw_new: | |||
2270 | case tok::kw_delete: { | |||
2271 | bool isNew = Tok.getKind() == tok::kw_new; | |||
2272 | // Consume the 'new' or 'delete'. | |||
2273 | SymbolLocations[SymbolIdx++] = ConsumeToken(); | |||
2274 | // Check for array new/delete. | |||
2275 | if (Tok.is(tok::l_square) && | |||
2276 | (!getLangOpts().CPlusPlus11 || NextToken().isNot(tok::l_square))) { | |||
2277 | // Consume the '[' and ']'. | |||
2278 | BalancedDelimiterTracker T(*this, tok::l_square); | |||
2279 | T.consumeOpen(); | |||
2280 | T.consumeClose(); | |||
2281 | if (T.getCloseLocation().isInvalid()) | |||
2282 | return true; | |||
2283 | ||||
2284 | SymbolLocations[SymbolIdx++] = T.getOpenLocation(); | |||
2285 | SymbolLocations[SymbolIdx++] = T.getCloseLocation(); | |||
2286 | Op = isNew? OO_Array_New : OO_Array_Delete; | |||
2287 | } else { | |||
2288 | Op = isNew? OO_New : OO_Delete; | |||
2289 | } | |||
2290 | break; | |||
2291 | } | |||
2292 | ||||
2293 | #define OVERLOADED_OPERATOR(Name,Spelling,Token,Unary,Binary,MemberOnly) \ | |||
2294 | case tok::Token: \ | |||
2295 | SymbolLocations[SymbolIdx++] = ConsumeToken(); \ | |||
2296 | Op = OO_##Name; \ | |||
2297 | break; | |||
2298 | #define OVERLOADED_OPERATOR_MULTI(Name,Spelling,Unary,Binary,MemberOnly) | |||
2299 | #include "clang/Basic/OperatorKinds.def" | |||
2300 | ||||
2301 | case tok::l_paren: { | |||
2302 | // Consume the '(' and ')'. | |||
2303 | BalancedDelimiterTracker T(*this, tok::l_paren); | |||
2304 | T.consumeOpen(); | |||
2305 | T.consumeClose(); | |||
2306 | if (T.getCloseLocation().isInvalid()) | |||
2307 | return true; | |||
2308 | ||||
2309 | SymbolLocations[SymbolIdx++] = T.getOpenLocation(); | |||
2310 | SymbolLocations[SymbolIdx++] = T.getCloseLocation(); | |||
2311 | Op = OO_Call; | |||
2312 | break; | |||
2313 | } | |||
2314 | ||||
2315 | case tok::l_square: { | |||
2316 | // Consume the '[' and ']'. | |||
2317 | BalancedDelimiterTracker T(*this, tok::l_square); | |||
2318 | T.consumeOpen(); | |||
2319 | T.consumeClose(); | |||
2320 | if (T.getCloseLocation().isInvalid()) | |||
2321 | return true; | |||
2322 | ||||
2323 | SymbolLocations[SymbolIdx++] = T.getOpenLocation(); | |||
2324 | SymbolLocations[SymbolIdx++] = T.getCloseLocation(); | |||
2325 | Op = OO_Subscript; | |||
2326 | break; | |||
2327 | } | |||
2328 | ||||
2329 | case tok::code_completion: { | |||
2330 | // Code completion for the operator name. | |||
2331 | Actions.CodeCompleteOperatorName(getCurScope()); | |||
2332 | cutOffParsing(); | |||
2333 | // Don't try to parse any further. | |||
2334 | return true; | |||
2335 | } | |||
2336 | ||||
2337 | default: | |||
2338 | break; | |||
2339 | } | |||
2340 | ||||
2341 | if (Op != OO_None) { | |||
2342 | // We have parsed an operator-function-id. | |||
2343 | Result.setOperatorFunctionId(KeywordLoc, Op, SymbolLocations); | |||
2344 | return false; | |||
2345 | } | |||
2346 | ||||
2347 | // Parse a literal-operator-id. | |||
2348 | // | |||
2349 | // literal-operator-id: C++11 [over.literal] | |||
2350 | // operator string-literal identifier | |||
2351 | // operator user-defined-string-literal | |||
2352 | ||||
2353 | if (getLangOpts().CPlusPlus11 && isTokenStringLiteral()) { | |||
2354 | Diag(Tok.getLocation(), diag::warn_cxx98_compat_literal_operator); | |||
2355 | ||||
2356 | SourceLocation DiagLoc; | |||
2357 | unsigned DiagId = 0; | |||
2358 | ||||
2359 | // We're past translation phase 6, so perform string literal concatenation | |||
2360 | // before checking for "". | |||
2361 | SmallVector<Token, 4> Toks; | |||
2362 | SmallVector<SourceLocation, 4> TokLocs; | |||
2363 | while (isTokenStringLiteral()) { | |||
2364 | if (!Tok.is(tok::string_literal) && !DiagId) { | |||
2365 | // C++11 [over.literal]p1: | |||
2366 | // The string-literal or user-defined-string-literal in a | |||
2367 | // literal-operator-id shall have no encoding-prefix [...]. | |||
2368 | DiagLoc = Tok.getLocation(); | |||
2369 | DiagId = diag::err_literal_operator_string_prefix; | |||
2370 | } | |||
2371 | Toks.push_back(Tok); | |||
2372 | TokLocs.push_back(ConsumeStringToken()); | |||
2373 | } | |||
2374 | ||||
2375 | StringLiteralParser Literal(Toks, PP); | |||
2376 | if (Literal.hadError) | |||
2377 | return true; | |||
2378 | ||||
2379 | // Grab the literal operator's suffix, which will be either the next token | |||
2380 | // or a ud-suffix from the string literal. | |||
2381 | IdentifierInfo *II = nullptr; | |||
2382 | SourceLocation SuffixLoc; | |||
2383 | if (!Literal.getUDSuffix().empty()) { | |||
2384 | II = &PP.getIdentifierTable().get(Literal.getUDSuffix()); | |||
2385 | SuffixLoc = | |||
2386 | Lexer::AdvanceToTokenCharacter(TokLocs[Literal.getUDSuffixToken()], | |||
2387 | Literal.getUDSuffixOffset(), | |||
2388 | PP.getSourceManager(), getLangOpts()); | |||
2389 | } else if (Tok.is(tok::identifier)) { | |||
2390 | II = Tok.getIdentifierInfo(); | |||
2391 | SuffixLoc = ConsumeToken(); | |||
2392 | TokLocs.push_back(SuffixLoc); | |||
2393 | } else { | |||
2394 | Diag(Tok.getLocation(), diag::err_expected) << tok::identifier; | |||
2395 | return true; | |||
2396 | } | |||
2397 | ||||
2398 | // The string literal must be empty. | |||
2399 | if (!Literal.GetString().empty() || Literal.Pascal) { | |||
2400 | // C++11 [over.literal]p1: | |||
2401 | // The string-literal or user-defined-string-literal in a | |||
2402 | // literal-operator-id shall [...] contain no characters | |||
2403 | // other than the implicit terminating '\0'. | |||
2404 | DiagLoc = TokLocs.front(); | |||
2405 | DiagId = diag::err_literal_operator_string_not_empty; | |||
2406 | } | |||
2407 | ||||
2408 | if (DiagId) { | |||
2409 | // This isn't a valid literal-operator-id, but we think we know | |||
2410 | // what the user meant. Tell them what they should have written. | |||
2411 | SmallString<32> Str; | |||
2412 | Str += "\"\""; | |||
2413 | Str += II->getName(); | |||
2414 | Diag(DiagLoc, DiagId) << FixItHint::CreateReplacement( | |||
2415 | SourceRange(TokLocs.front(), TokLocs.back()), Str); | |||
2416 | } | |||
2417 | ||||
2418 | Result.setLiteralOperatorId(II, KeywordLoc, SuffixLoc); | |||
2419 | ||||
2420 | return Actions.checkLiteralOperatorId(SS, Result); | |||
2421 | } | |||
2422 | ||||
2423 | // Parse a conversion-function-id. | |||
2424 | // | |||
2425 | // conversion-function-id: [C++ 12.3.2] | |||
2426 | // operator conversion-type-id | |||
2427 | // | |||
2428 | // conversion-type-id: | |||
2429 | // type-specifier-seq conversion-declarator[opt] | |||
2430 | // | |||
2431 | // conversion-declarator: | |||
2432 | // ptr-operator conversion-declarator[opt] | |||
2433 | ||||
2434 | // Parse the type-specifier-seq. | |||
2435 | DeclSpec DS(AttrFactory); | |||
2436 | if (ParseCXXTypeSpecifierSeq(DS)) // FIXME: ObjectType? | |||
2437 | return true; | |||
2438 | ||||
2439 | // Parse the conversion-declarator, which is merely a sequence of | |||
2440 | // ptr-operators. | |||
2441 | Declarator D(DS, DeclaratorContext::ConversionIdContext); | |||
2442 | ParseDeclaratorInternal(D, /*DirectDeclParser=*/nullptr); | |||
2443 | ||||
2444 | // Finish up the type. | |||
2445 | TypeResult Ty = Actions.ActOnTypeName(getCurScope(), D); | |||
2446 | if (Ty.isInvalid()) | |||
2447 | return true; | |||
2448 | ||||
2449 | // Note that this is a conversion-function-id. | |||
2450 | Result.setConversionFunctionId(KeywordLoc, Ty.get(), | |||
2451 | D.getSourceRange().getEnd()); | |||
2452 | return false; | |||
2453 | } | |||
2454 | ||||
2455 | /// Parse a C++ unqualified-id (or a C identifier), which describes the | |||
2456 | /// name of an entity. | |||
2457 | /// | |||
2458 | /// \code | |||
2459 | /// unqualified-id: [C++ expr.prim.general] | |||
2460 | /// identifier | |||
2461 | /// operator-function-id | |||
2462 | /// conversion-function-id | |||
2463 | /// [C++0x] literal-operator-id [TODO] | |||
2464 | /// ~ class-name | |||
2465 | /// template-id | |||
2466 | /// | |||
2467 | /// \endcode | |||
2468 | /// | |||
2469 | /// \param SS The nested-name-specifier that preceded this unqualified-id. If | |||
2470 | /// non-empty, then we are parsing the unqualified-id of a qualified-id. | |||
2471 | /// | |||
2472 | /// \param EnteringContext whether we are entering the scope of the | |||
2473 | /// nested-name-specifier. | |||
2474 | /// | |||
2475 | /// \param AllowDestructorName whether we allow parsing of a destructor name. | |||
2476 | /// | |||
2477 | /// \param AllowConstructorName whether we allow parsing a constructor name. | |||
2478 | /// | |||
2479 | /// \param AllowDeductionGuide whether we allow parsing a deduction guide name. | |||
2480 | /// | |||
2481 | /// \param ObjectType if this unqualified-id occurs within a member access | |||
2482 | /// expression, the type of the base object whose member is being accessed. | |||
2483 | /// | |||
2484 | /// \param Result on a successful parse, contains the parsed unqualified-id. | |||
2485 | /// | |||
2486 | /// \returns true if parsing fails, false otherwise. | |||
2487 | bool Parser::ParseUnqualifiedId(CXXScopeSpec &SS, bool EnteringContext, | |||
2488 | bool AllowDestructorName, | |||
2489 | bool AllowConstructorName, | |||
2490 | bool AllowDeductionGuide, | |||
2491 | ParsedType ObjectType, | |||
2492 | SourceLocation *TemplateKWLoc, | |||
2493 | UnqualifiedId &Result) { | |||
2494 | if (TemplateKWLoc) | |||
2495 | *TemplateKWLoc = SourceLocation(); | |||
2496 | ||||
2497 | // Handle 'A::template B'. This is for template-ids which have not | |||
2498 | // already been annotated by ParseOptionalCXXScopeSpecifier(). | |||
2499 | bool TemplateSpecified = false; | |||
2500 | if (Tok.is(tok::kw_template)) { | |||
2501 | if (TemplateKWLoc && (ObjectType || SS.isSet())) { | |||
2502 | TemplateSpecified = true; | |||
2503 | *TemplateKWLoc = ConsumeToken(); | |||
2504 | } else { | |||
2505 | SourceLocation TemplateLoc = ConsumeToken(); | |||
2506 | Diag(TemplateLoc, diag::err_unexpected_template_in_unqualified_id) | |||
2507 | << FixItHint::CreateRemoval(TemplateLoc); | |||
2508 | } | |||
2509 | } | |||
2510 | ||||
2511 | // unqualified-id: | |||
2512 | // identifier | |||
2513 | // template-id (when it hasn't already been annotated) | |||
2514 | if (Tok.is(tok::identifier)) { | |||
2515 | // Consume the identifier. | |||
2516 | IdentifierInfo *Id = Tok.getIdentifierInfo(); | |||
2517 | SourceLocation IdLoc = ConsumeToken(); | |||
2518 | ||||
2519 | if (!getLangOpts().CPlusPlus) { | |||
2520 | // If we're not in C++, only identifiers matter. Record the | |||
2521 | // identifier and return. | |||
2522 | Result.setIdentifier(Id, IdLoc); | |||
2523 | return false; | |||
2524 | } | |||
2525 | ||||
2526 | ParsedTemplateTy TemplateName; | |||
2527 | if (AllowConstructorName && | |||
2528 | Actions.isCurrentClassName(*Id, getCurScope(), &SS)) { | |||
2529 | // We have parsed a constructor name. | |||
2530 | ParsedType Ty = Actions.getConstructorName(*Id, IdLoc, getCurScope(), SS, | |||
2531 | EnteringContext); | |||
2532 | if (!Ty) | |||
2533 | return true; | |||
2534 | Result.setConstructorName(Ty, IdLoc, IdLoc); | |||
2535 | } else if (getLangOpts().CPlusPlus17 && | |||
2536 | AllowDeductionGuide && SS.isEmpty() && | |||
2537 | Actions.isDeductionGuideName(getCurScope(), *Id, IdLoc, | |||
2538 | &TemplateName)) { | |||
2539 | // We have parsed a template-name naming a deduction guide. | |||
2540 | Result.setDeductionGuideName(TemplateName, IdLoc); | |||
2541 | } else { | |||
2542 | // We have parsed an identifier. | |||
2543 | Result.setIdentifier(Id, IdLoc); | |||
2544 | } | |||
2545 | ||||
2546 | // If the next token is a '<', we may have a template. | |||
2547 | TemplateTy Template; | |||
2548 | if (Tok.is(tok::less)) | |||
2549 | return ParseUnqualifiedIdTemplateId( | |||
2550 | SS, TemplateKWLoc ? *TemplateKWLoc : SourceLocation(), Id, IdLoc, | |||
2551 | EnteringContext, ObjectType, Result, TemplateSpecified); | |||
2552 | else if (TemplateSpecified && | |||
2553 | Actions.ActOnDependentTemplateName( | |||
2554 | getCurScope(), SS, *TemplateKWLoc, Result, ObjectType, | |||
2555 | EnteringContext, Template, | |||
2556 | /*AllowInjectedClassName*/ true) == TNK_Non_template) | |||
2557 | return true; | |||
2558 | ||||
2559 | return false; | |||
2560 | } | |||
2561 | ||||
2562 | // unqualified-id: | |||
2563 | // template-id (already parsed and annotated) | |||
2564 | if (Tok.is(tok::annot_template_id)) { | |||
2565 | TemplateIdAnnotation *TemplateId = takeTemplateIdAnnotation(Tok); | |||
2566 | ||||
2567 | // If the template-name names the current class, then this is a constructor | |||
2568 | if (AllowConstructorName && TemplateId->Name && | |||
2569 | Actions.isCurrentClassName(*TemplateId->Name, getCurScope(), &SS)) { | |||
2570 | if (SS.isSet()) { | |||
2571 | // C++ [class.qual]p2 specifies that a qualified template-name | |||
2572 | // is taken as the constructor name where a constructor can be | |||
2573 | // declared. Thus, the template arguments are extraneous, so | |||
2574 | // complain about them and remove them entirely. | |||
2575 | Diag(TemplateId->TemplateNameLoc, | |||
2576 | diag::err_out_of_line_constructor_template_id) | |||
2577 | << TemplateId->Name | |||
2578 | << FixItHint::CreateRemoval( | |||
2579 | SourceRange(TemplateId->LAngleLoc, TemplateId->RAngleLoc)); | |||
2580 | ParsedType Ty = Actions.getConstructorName( | |||
2581 | *TemplateId->Name, TemplateId->TemplateNameLoc, getCurScope(), SS, | |||
2582 | EnteringContext); | |||
2583 | if (!Ty) | |||
2584 | return true; | |||
2585 | Result.setConstructorName(Ty, TemplateId->TemplateNameLoc, | |||
2586 | TemplateId->RAngleLoc); | |||
2587 | ConsumeAnnotationToken(); | |||
2588 | return false; | |||
2589 | } | |||
2590 | ||||
2591 | Result.setConstructorTemplateId(TemplateId); | |||
2592 | ConsumeAnnotationToken(); | |||
2593 | return false; | |||
2594 | } | |||
2595 | ||||
2596 | // We have already parsed a template-id; consume the annotation token as | |||
2597 | // our unqualified-id. | |||
2598 | Result.setTemplateId(TemplateId); | |||
2599 | SourceLocation TemplateLoc = TemplateId->TemplateKWLoc; | |||
2600 | if (TemplateLoc.isValid()) { | |||
2601 | if (TemplateKWLoc && (ObjectType || SS.isSet())) | |||
2602 | *TemplateKWLoc = TemplateLoc; | |||
2603 | else | |||
2604 | Diag(TemplateLoc, diag::err_unexpected_template_in_unqualified_id) | |||
2605 | << FixItHint::CreateRemoval(TemplateLoc); | |||
2606 | } | |||
2607 | ConsumeAnnotationToken(); | |||
2608 | return false; | |||
2609 | } | |||
2610 | ||||
2611 | // unqualified-id: | |||
2612 | // operator-function-id | |||
2613 | // conversion-function-id | |||
2614 | if (Tok.is(tok::kw_operator)) { | |||
2615 | if (ParseUnqualifiedIdOperator(SS, EnteringContext, ObjectType, Result)) | |||
2616 | return true; | |||
2617 | ||||
2618 | // If we have an operator-function-id or a literal-operator-id and the next | |||
2619 | // token is a '<', we may have a | |||
2620 | // | |||
2621 | // template-id: | |||
2622 | // operator-function-id < template-argument-list[opt] > | |||
2623 | TemplateTy Template; | |||
2624 | if ((Result.getKind() == UnqualifiedIdKind::IK_OperatorFunctionId || | |||
2625 | Result.getKind() == UnqualifiedIdKind::IK_LiteralOperatorId) && | |||
2626 | Tok.is(tok::less)) | |||
2627 | return ParseUnqualifiedIdTemplateId( | |||
2628 | SS, TemplateKWLoc ? *TemplateKWLoc : SourceLocation(), nullptr, | |||
2629 | SourceLocation(), EnteringContext, ObjectType, Result, | |||
2630 | TemplateSpecified); | |||
2631 | else if (TemplateSpecified && | |||
2632 | Actions.ActOnDependentTemplateName( | |||
2633 | getCurScope(), SS, *TemplateKWLoc, Result, ObjectType, | |||
2634 | EnteringContext, Template, | |||
2635 | /*AllowInjectedClassName*/ true) == TNK_Non_template) | |||
2636 | return true; | |||
2637 | ||||
2638 | return false; | |||
2639 | } | |||
2640 | ||||
2641 | if (getLangOpts().CPlusPlus && | |||
2642 | (AllowDestructorName || SS.isSet()) && Tok.is(tok::tilde)) { | |||
2643 | // C++ [expr.unary.op]p10: | |||
2644 | // There is an ambiguity in the unary-expression ~X(), where X is a | |||
2645 | // class-name. The ambiguity is resolved in favor of treating ~ as a | |||
2646 | // unary complement rather than treating ~X as referring to a destructor. | |||
2647 | ||||
2648 | // Parse the '~'. | |||
2649 | SourceLocation TildeLoc = ConsumeToken(); | |||
2650 | ||||
2651 | if (SS.isEmpty() && Tok.is(tok::kw_decltype)) { | |||
2652 | DeclSpec DS(AttrFactory); | |||
2653 | SourceLocation EndLoc = ParseDecltypeSpecifier(DS); | |||
2654 | if (ParsedType Type = | |||
2655 | Actions.getDestructorTypeForDecltype(DS, ObjectType)) { | |||
2656 | Result.setDestructorName(TildeLoc, Type, EndLoc); | |||
2657 | return false; | |||
2658 | } | |||
2659 | return true; | |||
2660 | } | |||
2661 | ||||
2662 | // Parse the class-name. | |||
2663 | if (Tok.isNot(tok::identifier)) { | |||
2664 | Diag(Tok, diag::err_destructor_tilde_identifier); | |||
2665 | return true; | |||
2666 | } | |||
2667 | ||||
2668 | // If the user wrote ~T::T, correct it to T::~T. | |||
2669 | DeclaratorScopeObj DeclScopeObj(*this, SS); | |||
2670 | if (!TemplateSpecified && NextToken().is(tok::coloncolon)) { | |||
2671 | // Don't let ParseOptionalCXXScopeSpecifier() "correct" | |||
2672 | // `int A; struct { ~A::A(); };` to `int A; struct { ~A:A(); };`, | |||
2673 | // it will confuse this recovery logic. | |||
2674 | ColonProtectionRAIIObject ColonRAII(*this, false); | |||
2675 | ||||
2676 | if (SS.isSet()) { | |||
2677 | AnnotateScopeToken(SS, /*NewAnnotation*/true); | |||
2678 | SS.clear(); | |||
2679 | } | |||
2680 | if (ParseOptionalCXXScopeSpecifier(SS, ObjectType, EnteringContext)) | |||
2681 | return true; | |||
2682 | if (SS.isNotEmpty()) | |||
2683 | ObjectType = nullptr; | |||
2684 | if (Tok.isNot(tok::identifier) || NextToken().is(tok::coloncolon) || | |||
2685 | !SS.isSet()) { | |||
2686 | Diag(TildeLoc, diag::err_destructor_tilde_scope); | |||
2687 | return true; | |||
2688 | } | |||
2689 | ||||
2690 | // Recover as if the tilde had been written before the identifier. | |||
2691 | Diag(TildeLoc, diag::err_destructor_tilde_scope) | |||
2692 | << FixItHint::CreateRemoval(TildeLoc) | |||
2693 | << FixItHint::CreateInsertion(Tok.getLocation(), "~"); | |||
2694 | ||||
2695 | // Temporarily enter the scope for the rest of this function. | |||
2696 | if (Actions.ShouldEnterDeclaratorScope(getCurScope(), SS)) | |||
2697 | DeclScopeObj.EnterDeclaratorScope(); | |||
2698 | } | |||
2699 | ||||
2700 | // Parse the class-name (or template-name in a simple-template-id). | |||
2701 | IdentifierInfo *ClassName = Tok.getIdentifierInfo(); | |||
2702 | SourceLocation ClassNameLoc = ConsumeToken(); | |||
2703 | ||||
2704 | if (Tok.is(tok::less)) { | |||
2705 | Result.setDestructorName(TildeLoc, nullptr, ClassNameLoc); | |||
2706 | return ParseUnqualifiedIdTemplateId( | |||
2707 | SS, TemplateKWLoc ? *TemplateKWLoc : SourceLocation(), ClassName, | |||
2708 | ClassNameLoc, EnteringContext, ObjectType, Result, TemplateSpecified); | |||
2709 | } | |||
2710 | ||||
2711 | // Note that this is a destructor name. | |||
2712 | ParsedType Ty = Actions.getDestructorName(TildeLoc, *ClassName, | |||
2713 | ClassNameLoc, getCurScope(), | |||
2714 | SS, ObjectType, | |||
2715 | EnteringContext); | |||
2716 | if (!Ty) | |||
2717 | return true; | |||
2718 | ||||
2719 | Result.setDestructorName(TildeLoc, Ty, ClassNameLoc); | |||
2720 | return false; | |||
2721 | } | |||
2722 | ||||
2723 | Diag(Tok, diag::err_expected_unqualified_id) | |||
2724 | << getLangOpts().CPlusPlus; | |||
2725 | return true; | |||
2726 | } | |||
2727 | ||||
2728 | /// ParseCXXNewExpression - Parse a C++ new-expression. New is used to allocate | |||
2729 | /// memory in a typesafe manner and call constructors. | |||
2730 | /// | |||
2731 | /// This method is called to parse the new expression after the optional :: has | |||
2732 | /// been already parsed. If the :: was present, "UseGlobal" is true and "Start" | |||
2733 | /// is its location. Otherwise, "Start" is the location of the 'new' token. | |||
2734 | /// | |||
2735 | /// new-expression: | |||
2736 | /// '::'[opt] 'new' new-placement[opt] new-type-id | |||
2737 | /// new-initializer[opt] | |||
2738 | /// '::'[opt] 'new' new-placement[opt] '(' type-id ')' | |||
2739 | /// new-initializer[opt] | |||
2740 | /// | |||
2741 | /// new-placement: | |||
2742 | /// '(' expression-list ')' | |||
2743 | /// | |||
2744 | /// new-type-id: | |||
2745 | /// type-specifier-seq new-declarator[opt] | |||
2746 | /// [GNU] attributes type-specifier-seq new-declarator[opt] | |||
2747 | /// | |||
2748 | /// new-declarator: | |||
2749 | /// ptr-operator new-declarator[opt] | |||
2750 | /// direct-new-declarator | |||
2751 | /// | |||
2752 | /// new-initializer: | |||
2753 | /// '(' expression-list[opt] ')' | |||
2754 | /// [C++0x] braced-init-list | |||
2755 | /// | |||
2756 | ExprResult | |||
2757 | Parser::ParseCXXNewExpression(bool UseGlobal, SourceLocation Start) { | |||
2758 | assert(Tok.is(tok::kw_new) && "expected 'new' token")((Tok.is(tok::kw_new) && "expected 'new' token") ? static_cast <void> (0) : __assert_fail ("Tok.is(tok::kw_new) && \"expected 'new' token\"" , "/build/llvm-toolchain-snapshot-8~svn345461/tools/clang/lib/Parse/ParseExprCXX.cpp" , 2758, __PRETTY_FUNCTION__)); | |||
2759 | ConsumeToken(); // Consume 'new' | |||
2760 | ||||
2761 | // A '(' now can be a new-placement or the '(' wrapping the type-id in the | |||
2762 | // second form of new-expression. It can't be a new-type-id. | |||
2763 | ||||
2764 | ExprVector PlacementArgs; | |||
2765 | SourceLocation PlacementLParen, PlacementRParen; | |||
2766 | ||||
2767 | SourceRange TypeIdParens; | |||
2768 | DeclSpec DS(AttrFactory); | |||
2769 | Declarator DeclaratorInfo(DS, DeclaratorContext::CXXNewContext); | |||
2770 | if (Tok.is(tok::l_paren)) { | |||
2771 | // If it turns out to be a placement, we change the type location. | |||
2772 | BalancedDelimiterTracker T(*this, tok::l_paren); | |||
2773 | T.consumeOpen(); | |||
2774 | PlacementLParen = T.getOpenLocation(); | |||
2775 | if (ParseExpressionListOrTypeId(PlacementArgs, DeclaratorInfo)) { | |||
2776 | SkipUntil(tok::semi, StopAtSemi | StopBeforeMatch); | |||
2777 | return ExprError(); | |||
2778 | } | |||
2779 | ||||
2780 | T.consumeClose(); | |||
2781 | PlacementRParen = T.getCloseLocation(); | |||
2782 | if (PlacementRParen.isInvalid()) { | |||
2783 | SkipUntil(tok::semi, StopAtSemi | StopBeforeMatch); | |||
2784 | return ExprError(); | |||
2785 | } | |||
2786 | ||||
2787 | if (PlacementArgs.empty()) { | |||
2788 | // Reset the placement locations. There was no placement. | |||
2789 | TypeIdParens = T.getRange(); | |||
2790 | PlacementLParen = PlacementRParen = SourceLocation(); | |||
2791 | } else { | |||
2792 | // We still need the type. | |||
2793 | if (Tok.is(tok::l_paren)) { | |||
2794 | BalancedDelimiterTracker T(*this, tok::l_paren); | |||
2795 | T.consumeOpen(); | |||
2796 | MaybeParseGNUAttributes(DeclaratorInfo); | |||
2797 | ParseSpecifierQualifierList(DS); | |||
2798 | DeclaratorInfo.SetSourceRange(DS.getSourceRange()); | |||
2799 | ParseDeclarator(DeclaratorInfo); | |||
2800 | T.consumeClose(); | |||
2801 | TypeIdParens = T.getRange(); | |||
2802 | } else { | |||
2803 | MaybeParseGNUAttributes(DeclaratorInfo); | |||
2804 | if (ParseCXXTypeSpecifierSeq(DS)) | |||
2805 | DeclaratorInfo.setInvalidType(true); | |||
2806 | else { | |||
2807 | DeclaratorInfo.SetSourceRange(DS.getSourceRange()); | |||
2808 | ParseDeclaratorInternal(DeclaratorInfo, | |||
2809 | &Parser::ParseDirectNewDeclarator); | |||
2810 | } | |||
2811 | } | |||
2812 | } | |||
2813 | } else { | |||
2814 | // A new-type-id is a simplified type-id, where essentially the | |||
2815 | // direct-declarator is replaced by a direct-new-declarator. | |||
2816 | MaybeParseGNUAttributes(DeclaratorInfo); | |||
2817 | if (ParseCXXTypeSpecifierSeq(DS)) | |||
2818 | DeclaratorInfo.setInvalidType(true); | |||
2819 | else { | |||
2820 | DeclaratorInfo.SetSourceRange(DS.getSourceRange()); | |||
2821 | ParseDeclaratorInternal(DeclaratorInfo, | |||
2822 | &Parser::ParseDirectNewDeclarator); | |||
2823 | } | |||
2824 | } | |||
2825 | if (DeclaratorInfo.isInvalidType()) { | |||
2826 | SkipUntil(tok::semi, StopAtSemi | StopBeforeMatch); | |||
2827 | return ExprError(); | |||
2828 | } | |||
2829 | ||||
2830 | ExprResult Initializer; | |||
2831 | ||||
2832 | if (Tok.is(tok::l_paren)) { | |||
2833 | SourceLocation ConstructorLParen, ConstructorRParen; | |||
2834 | ExprVector ConstructorArgs; | |||
2835 | BalancedDelimiterTracker T(*this, tok::l_paren); | |||
2836 | T.consumeOpen(); | |||
2837 | ConstructorLParen = T.getOpenLocation(); | |||
2838 | if (Tok.isNot(tok::r_paren)) { | |||
2839 | CommaLocsTy CommaLocs; | |||
2840 | if (ParseExpressionList(ConstructorArgs, CommaLocs, [&] { | |||
2841 | ParsedType TypeRep = | |||
2842 | Actions.ActOnTypeName(getCurScope(), DeclaratorInfo).get(); | |||
2843 | QualType PreferredType = Actions.ProduceConstructorSignatureHelp( | |||
2844 | getCurScope(), TypeRep.get()->getCanonicalTypeInternal(), | |||
2845 | DeclaratorInfo.getEndLoc(), ConstructorArgs, ConstructorLParen); | |||
2846 | CalledSignatureHelp = true; | |||
2847 | Actions.CodeCompleteExpression(getCurScope(), PreferredType); | |||
2848 | })) { | |||
2849 | if (PP.isCodeCompletionReached() && !CalledSignatureHelp) { | |||
2850 | ParsedType TypeRep = | |||
2851 | Actions.ActOnTypeName(getCurScope(), DeclaratorInfo).get(); | |||
2852 | Actions.ProduceConstructorSignatureHelp( | |||
2853 | getCurScope(), TypeRep.get()->getCanonicalTypeInternal(), | |||
2854 | DeclaratorInfo.getEndLoc(), ConstructorArgs, ConstructorLParen); | |||
2855 | CalledSignatureHelp = true; | |||
2856 | } | |||
2857 | SkipUntil(tok::semi, StopAtSemi | StopBeforeMatch); | |||
2858 | return ExprError(); | |||
2859 | } | |||
2860 | } | |||
2861 | T.consumeClose(); | |||
2862 | ConstructorRParen = T.getCloseLocation(); | |||
2863 | if (ConstructorRParen.isInvalid()) { | |||
2864 | SkipUntil(tok::semi, StopAtSemi | StopBeforeMatch); | |||
2865 | return ExprError(); | |||
2866 | } | |||
2867 | Initializer = Actions.ActOnParenListExpr(ConstructorLParen, | |||
2868 | ConstructorRParen, | |||
2869 | ConstructorArgs); | |||
2870 | } else if (Tok.is(tok::l_brace) && getLangOpts().CPlusPlus11) { | |||
2871 | Diag(Tok.getLocation(), | |||
2872 | diag::warn_cxx98_compat_generalized_initializer_lists); | |||
2873 | Initializer = ParseBraceInitializer(); | |||
2874 | } | |||
2875 | if (Initializer.isInvalid()) | |||
2876 | return Initializer; | |||
2877 | ||||
2878 | return Actions.ActOnCXXNew(Start, UseGlobal, PlacementLParen, | |||
2879 | PlacementArgs, PlacementRParen, | |||
2880 | TypeIdParens, DeclaratorInfo, Initializer.get()); | |||
2881 | } | |||
2882 | ||||
2883 | /// ParseDirectNewDeclarator - Parses a direct-new-declarator. Intended to be | |||
2884 | /// passed to ParseDeclaratorInternal. | |||
2885 | /// | |||
2886 | /// direct-new-declarator: | |||
2887 | /// '[' expression ']' | |||
2888 | /// direct-new-declarator '[' constant-expression ']' | |||
2889 | /// | |||
2890 | void Parser::ParseDirectNewDeclarator(Declarator &D) { | |||
2891 | // Parse the array dimensions. | |||
2892 | bool first = true; | |||
2893 | while (Tok.is(tok::l_square)) { | |||
2894 | // An array-size expression can't start with a lambda. | |||
2895 | if (CheckProhibitedCXX11Attribute()) | |||
2896 | continue; | |||
2897 | ||||
2898 | BalancedDelimiterTracker T(*this, tok::l_square); | |||
2899 | T.consumeOpen(); | |||
2900 | ||||
2901 | ExprResult Size(first ? ParseExpression() | |||
2902 | : ParseConstantExpression()); | |||
2903 | if (Size.isInvalid()) { | |||
2904 | // Recover | |||
2905 | SkipUntil(tok::r_square, StopAtSemi); | |||
2906 | return; | |||
2907 | } | |||
2908 | first = false; | |||
2909 | ||||
2910 | T.consumeClose(); | |||
2911 | ||||
2912 | // Attributes here appertain to the array type. C++11 [expr.new]p5. | |||
2913 | ParsedAttributes Attrs(AttrFactory); | |||
2914 | MaybeParseCXX11Attributes(Attrs); | |||
2915 | ||||
2916 | D.AddTypeInfo(DeclaratorChunk::getArray(0, | |||
2917 | /*static=*/false, /*star=*/false, | |||
2918 | Size.get(), T.getOpenLocation(), | |||
2919 | T.getCloseLocation()), | |||
2920 | std::move(Attrs), T.getCloseLocation()); | |||
2921 | ||||
2922 | if (T.getCloseLocation().isInvalid()) | |||
2923 | return; | |||
2924 | } | |||
2925 | } | |||
2926 | ||||
2927 | /// ParseExpressionListOrTypeId - Parse either an expression-list or a type-id. | |||
2928 | /// This ambiguity appears in the syntax of the C++ new operator. | |||
2929 | /// | |||
2930 | /// new-expression: | |||
2931 | /// '::'[opt] 'new' new-placement[opt] '(' type-id ')' | |||
2932 | /// new-initializer[opt] | |||
2933 | /// | |||
2934 | /// new-placement: | |||
2935 | /// '(' expression-list ')' | |||
2936 | /// | |||
2937 | bool Parser::ParseExpressionListOrTypeId( | |||
2938 | SmallVectorImpl<Expr*> &PlacementArgs, | |||
2939 | Declarator &D) { | |||
2940 | // The '(' was already consumed. | |||
2941 | if (isTypeIdInParens()) { | |||
2942 | ParseSpecifierQualifierList(D.getMutableDeclSpec()); | |||
2943 | D.SetSourceRange(D.getDeclSpec().getSourceRange()); | |||
2944 | ParseDeclarator(D); | |||
2945 | return D.isInvalidType(); | |||
2946 | } | |||
2947 | ||||
2948 | // It's not a type, it has to be an expression list. | |||
2949 | // Discard the comma locations - ActOnCXXNew has enough parameters. | |||
2950 | CommaLocsTy CommaLocs; | |||
2951 | return ParseExpressionList(PlacementArgs, CommaLocs); | |||
2952 | } | |||
2953 | ||||
2954 | /// ParseCXXDeleteExpression - Parse a C++ delete-expression. Delete is used | |||
2955 | /// to free memory allocated by new. | |||
2956 | /// | |||
2957 | /// This method is called to parse the 'delete' expression after the optional | |||
2958 | /// '::' has been already parsed. If the '::' was present, "UseGlobal" is true | |||
2959 | /// and "Start" is its location. Otherwise, "Start" is the location of the | |||
2960 | /// 'delete' token. | |||
2961 | /// | |||
2962 | /// delete-expression: | |||
2963 | /// '::'[opt] 'delete' cast-expression | |||
2964 | /// '::'[opt] 'delete' '[' ']' cast-expression | |||
2965 | ExprResult | |||
2966 | Parser::ParseCXXDeleteExpression(bool UseGlobal, SourceLocation Start) { | |||
2967 | assert(Tok.is(tok::kw_delete) && "Expected 'delete' keyword")((Tok.is(tok::kw_delete) && "Expected 'delete' keyword" ) ? static_cast<void> (0) : __assert_fail ("Tok.is(tok::kw_delete) && \"Expected 'delete' keyword\"" , "/build/llvm-toolchain-snapshot-8~svn345461/tools/clang/lib/Parse/ParseExprCXX.cpp" , 2967, __PRETTY_FUNCTION__)); | |||
2968 | ConsumeToken(); // Consume 'delete' | |||
2969 | ||||
2970 | // Array delete? | |||
2971 | bool ArrayDelete = false; | |||
2972 | if (Tok.is(tok::l_square) && NextToken().is(tok::r_square)) { | |||
2973 | // C++11 [expr.delete]p1: | |||
2974 | // Whenever the delete keyword is followed by empty square brackets, it | |||
2975 | // shall be interpreted as [array delete]. | |||
2976 | // [Footnote: A lambda expression with a lambda-introducer that consists | |||
2977 | // of empty square brackets can follow the delete keyword if | |||
2978 | // the lambda expression is enclosed in parentheses.] | |||
2979 | // FIXME: Produce a better diagnostic if the '[]' is unambiguously a | |||
2980 | // lambda-introducer. | |||
2981 | ArrayDelete = true; | |||
2982 | BalancedDelimiterTracker T(*this, tok::l_square); | |||
2983 | ||||
2984 | T.consumeOpen(); | |||
2985 | T.consumeClose(); | |||
2986 | if (T.getCloseLocation().isInvalid()) | |||
2987 | return ExprError(); | |||
2988 | } | |||
2989 | ||||
2990 | ExprResult Operand(ParseCastExpression(false)); | |||
2991 | if (Operand.isInvalid()) | |||
2992 | return Operand; | |||
2993 | ||||
2994 | return Actions.ActOnCXXDelete(Start, UseGlobal, ArrayDelete, Operand.get()); | |||
2995 | } | |||
2996 | ||||
2997 | static TypeTrait TypeTraitFromTokKind(tok::TokenKind kind) { | |||
2998 | switch (kind) { | |||
2999 | default: llvm_unreachable("Not a known type trait")::llvm::llvm_unreachable_internal("Not a known type trait", "/build/llvm-toolchain-snapshot-8~svn345461/tools/clang/lib/Parse/ParseExprCXX.cpp" , 2999); | |||
3000 | #define TYPE_TRAIT_1(Spelling, Name, Key) \ | |||
3001 | case tok::kw_ ## Spelling: return UTT_ ## Name; | |||
3002 | #define TYPE_TRAIT_2(Spelling, Name, Key) \ | |||
3003 | case tok::kw_ ## Spelling: return BTT_ ## Name; | |||
3004 | #include "clang/Basic/TokenKinds.def" | |||
3005 | #define TYPE_TRAIT_N(Spelling, Name, Key) \ | |||
3006 | case tok::kw_ ## Spelling: return TT_ ## Name; | |||
3007 | #include "clang/Basic/TokenKinds.def" | |||
3008 | } | |||
3009 | } | |||
3010 | ||||
3011 | static ArrayTypeTrait ArrayTypeTraitFromTokKind(tok::TokenKind kind) { | |||
3012 | switch(kind) { | |||
3013 | default: llvm_unreachable("Not a known binary type trait")::llvm::llvm_unreachable_internal("Not a known binary type trait" , "/build/llvm-toolchain-snapshot-8~svn345461/tools/clang/lib/Parse/ParseExprCXX.cpp" , 3013); | |||
3014 | case tok::kw___array_rank: return ATT_ArrayRank; | |||
3015 | case tok::kw___array_extent: return ATT_ArrayExtent; | |||
3016 | } | |||
3017 | } | |||
3018 | ||||
3019 | static ExpressionTrait ExpressionTraitFromTokKind(tok::TokenKind kind) { | |||
3020 | switch(kind) { | |||
3021 | default: llvm_unreachable("Not a known unary expression trait.")::llvm::llvm_unreachable_internal("Not a known unary expression trait." , "/build/llvm-toolchain-snapshot-8~svn345461/tools/clang/lib/Parse/ParseExprCXX.cpp" , 3021); | |||
3022 | case tok::kw___is_lvalue_expr: return ET_IsLValueExpr; | |||
3023 | case tok::kw___is_rvalue_expr: return ET_IsRValueExpr; | |||
3024 | } | |||
3025 | } | |||
3026 | ||||
3027 | static unsigned TypeTraitArity(tok::TokenKind kind) { | |||
3028 | switch (kind) { | |||
3029 | default: llvm_unreachable("Not a known type trait")::llvm::llvm_unreachable_internal("Not a known type trait", "/build/llvm-toolchain-snapshot-8~svn345461/tools/clang/lib/Parse/ParseExprCXX.cpp" , 3029); | |||
3030 | #define TYPE_TRAIT(N,Spelling,K) case tok::kw_##Spelling: return N; | |||
3031 | #include "clang/Basic/TokenKinds.def" | |||
3032 | } | |||
3033 | } | |||
3034 | ||||
3035 | /// Parse the built-in type-trait pseudo-functions that allow | |||
3036 | /// implementation of the TR1/C++11 type traits templates. | |||
3037 | /// | |||
3038 | /// primary-expression: | |||
3039 | /// unary-type-trait '(' type-id ')' | |||
3040 | /// binary-type-trait '(' type-id ',' type-id ')' | |||
3041 | /// type-trait '(' type-id-seq ')' | |||
3042 | /// | |||
3043 | /// type-id-seq: | |||
3044 | /// type-id ...[opt] type-id-seq[opt] | |||
3045 | /// | |||
3046 | ExprResult Parser::ParseTypeTrait() { | |||
3047 | tok::TokenKind Kind = Tok.getKind(); | |||
3048 | unsigned Arity = TypeTraitArity(Kind); | |||
3049 | ||||
3050 | SourceLocation Loc = ConsumeToken(); | |||
3051 | ||||
3052 | BalancedDelimiterTracker Parens(*this, tok::l_paren); | |||
3053 | if (Parens.expectAndConsume()) | |||
3054 | return ExprError(); | |||
3055 | ||||
3056 | SmallVector<ParsedType, 2> Args; | |||
3057 | do { | |||
3058 | // Parse the next type. | |||
3059 | TypeResult Ty = ParseTypeName(); | |||
3060 | if (Ty.isInvalid()) { | |||
3061 | Parens.skipToEnd(); | |||
3062 | return ExprError(); | |||
3063 | } | |||
3064 | ||||
3065 | // Parse the ellipsis, if present. | |||
3066 | if (Tok.is(tok::ellipsis)) { | |||
3067 | Ty = Actions.ActOnPackExpansion(Ty.get(), ConsumeToken()); | |||
3068 | if (Ty.isInvalid()) { | |||
3069 | Parens.skipToEnd(); | |||
3070 | return ExprError(); | |||
3071 | } | |||
3072 | } | |||
3073 | ||||
3074 | // Add this type to the list of arguments. | |||
3075 | Args.push_back(Ty.get()); | |||
3076 | } while (TryConsumeToken(tok::comma)); | |||
3077 | ||||
3078 | if (Parens.consumeClose()) | |||
3079 | return ExprError(); | |||
3080 | ||||
3081 | SourceLocation EndLoc = Parens.getCloseLocation(); | |||
3082 | ||||
3083 | if (Arity && Args.size() != Arity) { | |||
3084 | Diag(EndLoc, diag::err_type_trait_arity) | |||
3085 | << Arity << 0 << (Arity > 1) << (int)Args.size() << SourceRange(Loc); | |||
3086 | return ExprError(); | |||
3087 | } | |||
3088 | ||||
3089 | if (!Arity && Args.empty()) { | |||
3090 | Diag(EndLoc, diag::err_type_trait_arity) | |||
3091 | << 1 << 1 << 1 << (int)Args.size() << SourceRange(Loc); | |||
3092 | return ExprError(); | |||
3093 | } | |||
3094 | ||||
3095 | return Actions.ActOnTypeTrait(TypeTraitFromTokKind(Kind), Loc, Args, EndLoc); | |||
3096 | } | |||
3097 | ||||
3098 | /// ParseArrayTypeTrait - Parse the built-in array type-trait | |||
3099 | /// pseudo-functions. | |||
3100 | /// | |||
3101 | /// primary-expression: | |||
3102 | /// [Embarcadero] '__array_rank' '(' type-id ')' | |||
3103 | /// [Embarcadero] '__array_extent' '(' type-id ',' expression ')' | |||
3104 | /// | |||
3105 | ExprResult Parser::ParseArrayTypeTrait() { | |||
3106 | ArrayTypeTrait ATT = ArrayTypeTraitFromTokKind(Tok.getKind()); | |||
3107 | SourceLocation Loc = ConsumeToken(); | |||
3108 | ||||
3109 | BalancedDelimiterTracker T(*this, tok::l_paren); | |||
3110 | if (T.expectAndConsume()) | |||
3111 | return ExprError(); | |||
3112 | ||||
3113 | TypeResult Ty = ParseTypeName(); | |||
3114 | if (Ty.isInvalid()) { | |||
3115 | SkipUntil(tok::comma, StopAtSemi); | |||
3116 | SkipUntil(tok::r_paren, StopAtSemi); | |||
3117 | return ExprError(); | |||
3118 | } | |||
3119 | ||||
3120 | switch (ATT) { | |||
3121 | case ATT_ArrayRank: { | |||
3122 | T.consumeClose(); | |||
3123 | return Actions.ActOnArrayTypeTrait(ATT, Loc, Ty.get(), nullptr, | |||
3124 | T.getCloseLocation()); | |||
3125 | } | |||
3126 | case ATT_ArrayExtent: { | |||
3127 | if (ExpectAndConsume(tok::comma)) { | |||
3128 | SkipUntil(tok::r_paren, StopAtSemi); | |||
3129 | return ExprError(); | |||
3130 | } | |||
3131 | ||||
3132 | ExprResult DimExpr = ParseExpression(); | |||
3133 | T.consumeClose(); | |||
3134 | ||||
3135 | return Actions.ActOnArrayTypeTrait(ATT, Loc, Ty.get(), DimExpr.get(), | |||
3136 | T.getCloseLocation()); | |||
3137 | } | |||
3138 | } | |||
3139 | llvm_unreachable("Invalid ArrayTypeTrait!")::llvm::llvm_unreachable_internal("Invalid ArrayTypeTrait!", "/build/llvm-toolchain-snapshot-8~svn345461/tools/clang/lib/Parse/ParseExprCXX.cpp" , 3139); | |||
3140 | } | |||
3141 | ||||
3142 | /// ParseExpressionTrait - Parse built-in expression-trait | |||
3143 | /// pseudo-functions like __is_lvalue_expr( xxx ). | |||
3144 | /// | |||
3145 | /// primary-expression: | |||
3146 | /// [Embarcadero] expression-trait '(' expression ')' | |||
3147 | /// | |||
3148 | ExprResult Parser::ParseExpressionTrait() { | |||
3149 | ExpressionTrait ET = ExpressionTraitFromTokKind(Tok.getKind()); | |||
3150 | SourceLocation Loc = ConsumeToken(); | |||
3151 | ||||
3152 | BalancedDelimiterTracker T(*this, tok::l_paren); | |||
3153 | if (T.expectAndConsume()) | |||
3154 | return ExprError(); | |||
3155 | ||||
3156 | ExprResult Expr = ParseExpression(); | |||
3157 | ||||
3158 | T.consumeClose(); | |||
3159 | ||||
3160 | return Actions.ActOnExpressionTrait(ET, Loc, Expr.get(), | |||
3161 | T.getCloseLocation()); | |||
3162 | } | |||
3163 | ||||
3164 | ||||
3165 | /// ParseCXXAmbiguousParenExpression - We have parsed the left paren of a | |||
3166 | /// parenthesized ambiguous type-id. This uses tentative parsing to disambiguate | |||
3167 | /// based on the context past the parens. | |||
3168 | ExprResult | |||
3169 | Parser::ParseCXXAmbiguousParenExpression(ParenParseOption &ExprType, | |||
3170 | ParsedType &CastTy, | |||
3171 | BalancedDelimiterTracker &Tracker, | |||
3172 | ColonProtectionRAIIObject &ColonProt) { | |||
3173 | assert(getLangOpts().CPlusPlus && "Should only be called for C++!")((getLangOpts().CPlusPlus && "Should only be called for C++!" ) ? static_cast<void> (0) : __assert_fail ("getLangOpts().CPlusPlus && \"Should only be called for C++!\"" , "/build/llvm-toolchain-snapshot-8~svn345461/tools/clang/lib/Parse/ParseExprCXX.cpp" , 3173, __PRETTY_FUNCTION__)); | |||
3174 | assert(ExprType == CastExpr && "Compound literals are not ambiguous!")((ExprType == CastExpr && "Compound literals are not ambiguous!" ) ? static_cast<void> (0) : __assert_fail ("ExprType == CastExpr && \"Compound literals are not ambiguous!\"" , "/build/llvm-toolchain-snapshot-8~svn345461/tools/clang/lib/Parse/ParseExprCXX.cpp" , 3174, __PRETTY_FUNCTION__)); | |||
3175 | assert(isTypeIdInParens() && "Not a type-id!")((isTypeIdInParens() && "Not a type-id!") ? static_cast <void> (0) : __assert_fail ("isTypeIdInParens() && \"Not a type-id!\"" , "/build/llvm-toolchain-snapshot-8~svn345461/tools/clang/lib/Parse/ParseExprCXX.cpp" , 3175, __PRETTY_FUNCTION__)); | |||
3176 | ||||
3177 | ExprResult Result(true); | |||
3178 | CastTy = nullptr; | |||
3179 | ||||
3180 | // We need to disambiguate a very ugly part of the C++ syntax: | |||
3181 | // | |||
3182 | // (T())x; - type-id | |||
3183 | // (T())*x; - type-id | |||
3184 | // (T())/x; - expression | |||
3185 | // (T()); - expression | |||
3186 | // | |||
3187 | // The bad news is that we cannot use the specialized tentative parser, since | |||
3188 | // it can only verify that the thing inside the parens can be parsed as | |||
3189 | // type-id, it is not useful for determining the context past the parens. | |||
3190 | // | |||
3191 | // The good news is that the parser can disambiguate this part without | |||
3192 | // making any unnecessary Action calls. | |||
3193 | // | |||
3194 | // It uses a scheme similar to parsing inline methods. The parenthesized | |||
3195 | // tokens are cached, the context that follows is determined (possibly by | |||
3196 | // parsing a cast-expression), and then we re-introduce the cached tokens | |||
3197 | // into the token stream and parse them appropriately. | |||
3198 | ||||
3199 | ParenParseOption ParseAs; | |||
3200 | CachedTokens Toks; | |||
3201 | ||||
3202 | // Store the tokens of the parentheses. We will parse them after we determine | |||
3203 | // the context that follows them. | |||
3204 | if (!ConsumeAndStoreUntil(tok::r_paren, Toks)) { | |||
3205 | // We didn't find the ')' we expected. | |||
3206 | Tracker.consumeClose(); | |||
3207 | return ExprError(); | |||
3208 | } | |||
3209 | ||||
3210 | if (Tok.is(tok::l_brace)) { | |||
3211 | ParseAs = CompoundLiteral; | |||
3212 | } else { | |||
3213 | bool NotCastExpr; | |||
3214 | if (Tok.is(tok::l_paren) && NextToken().is(tok::r_paren)) { | |||
3215 | NotCastExpr = true; | |||
3216 | } else { | |||
3217 | // Try parsing the cast-expression that may follow. | |||
3218 | // If it is not a cast-expression, NotCastExpr will be true and no token | |||
3219 | // will be consumed. | |||
3220 | ColonProt.restore(); | |||
3221 | Result = ParseCastExpression(false/*isUnaryExpression*/, | |||
3222 | false/*isAddressofOperand*/, | |||
3223 | NotCastExpr, | |||
3224 | // type-id has priority. | |||
3225 | IsTypeCast); | |||
3226 | } | |||
3227 | ||||
3228 | // If we parsed a cast-expression, it's really a type-id, otherwise it's | |||
3229 | // an expression. | |||
3230 | ParseAs = NotCastExpr ? SimpleExpr : CastExpr; | |||
3231 | } | |||
3232 | ||||
3233 | // Create a fake EOF to mark end of Toks buffer. | |||
3234 | Token AttrEnd; | |||
3235 | AttrEnd.startToken(); | |||
3236 | AttrEnd.setKind(tok::eof); | |||
3237 | AttrEnd.setLocation(Tok.getLocation()); | |||
3238 | AttrEnd.setEofData(Toks.data()); | |||
3239 | Toks.push_back(AttrEnd); | |||
3240 | ||||
3241 | // The current token should go after the cached tokens. | |||
3242 | Toks.push_back(Tok); | |||
3243 | // Re-enter the stored parenthesized tokens into the token stream, so we may | |||
3244 | // parse them now. | |||
3245 | PP.EnterTokenStream(Toks, true /*DisableMacroExpansion*/); | |||
3246 | // Drop the current token and bring the first cached one. It's the same token | |||
3247 | // as when we entered this function. | |||
3248 | ConsumeAnyToken(); | |||
3249 | ||||
3250 | if (ParseAs >= CompoundLiteral) { | |||
3251 | // Parse the type declarator. | |||
3252 | DeclSpec DS(AttrFactory); | |||
3253 | Declarator DeclaratorInfo(DS, DeclaratorContext::TypeNameContext); | |||
3254 | { | |||
3255 | ColonProtectionRAIIObject InnerColonProtection(*this); | |||
3256 | ParseSpecifierQualifierList(DS); | |||
3257 | ParseDeclarator(DeclaratorInfo); | |||
3258 | } | |||
3259 | ||||
3260 | // Match the ')'. | |||
3261 | Tracker.consumeClose(); | |||
3262 | ColonProt.restore(); | |||
3263 | ||||
3264 | // Consume EOF marker for Toks buffer. | |||
3265 | assert(Tok.is(tok::eof) && Tok.getEofData() == AttrEnd.getEofData())((Tok.is(tok::eof) && Tok.getEofData() == AttrEnd.getEofData ()) ? static_cast<void> (0) : __assert_fail ("Tok.is(tok::eof) && Tok.getEofData() == AttrEnd.getEofData()" , "/build/llvm-toolchain-snapshot-8~svn345461/tools/clang/lib/Parse/ParseExprCXX.cpp" , 3265, __PRETTY_FUNCTION__)); | |||
3266 | ConsumeAnyToken(); | |||
3267 | ||||
3268 | if (ParseAs == CompoundLiteral) { | |||
3269 | ExprType = CompoundLiteral; | |||
3270 | if (DeclaratorInfo.isInvalidType()) | |||
3271 | return ExprError(); | |||
3272 | ||||
3273 | TypeResult Ty = Actions.ActOnTypeName(getCurScope(), DeclaratorInfo); | |||
3274 | return ParseCompoundLiteralExpression(Ty.get(), | |||
3275 | Tracker.getOpenLocation(), | |||
3276 | Tracker.getCloseLocation()); | |||
3277 | } | |||
3278 | ||||
3279 | // We parsed '(' type-id ')' and the thing after it wasn't a '{'. | |||
3280 | assert(ParseAs == CastExpr)((ParseAs == CastExpr) ? static_cast<void> (0) : __assert_fail ("ParseAs == CastExpr", "/build/llvm-toolchain-snapshot-8~svn345461/tools/clang/lib/Parse/ParseExprCXX.cpp" , 3280, __PRETTY_FUNCTION__)); | |||
3281 | ||||
3282 | if (DeclaratorInfo.isInvalidType()) | |||
3283 | return ExprError(); | |||
3284 | ||||
3285 | // Result is what ParseCastExpression returned earlier. | |||
3286 | if (!Result.isInvalid()) | |||
3287 | Result = Actions.ActOnCastExpr(getCurScope(), Tracker.getOpenLocation(), | |||
3288 | DeclaratorInfo, CastTy, | |||
3289 | Tracker.getCloseLocation(), Result.get()); | |||
3290 | return Result; | |||
3291 | } | |||
3292 | ||||
3293 | // Not a compound literal, and not followed by a cast-expression. | |||
3294 | assert(ParseAs == SimpleExpr)((ParseAs == SimpleExpr) ? static_cast<void> (0) : __assert_fail ("ParseAs == SimpleExpr", "/build/llvm-toolchain-snapshot-8~svn345461/tools/clang/lib/Parse/ParseExprCXX.cpp" , 3294, __PRETTY_FUNCTION__)); | |||
3295 | ||||
3296 | ExprType = SimpleExpr; | |||
3297 | Result = ParseExpression(); | |||
3298 | if (!Result.isInvalid() && Tok.is(tok::r_paren)) | |||
3299 | Result = Actions.ActOnParenExpr(Tracker.getOpenLocation(), | |||
3300 | Tok.getLocation(), Result.get()); | |||
3301 | ||||
3302 | // Match the ')'. | |||
3303 | if (Result.isInvalid()) { | |||
3304 | while (Tok.isNot(tok::eof)) | |||
3305 | ConsumeAnyToken(); | |||
3306 | assert(Tok.getEofData() == AttrEnd.getEofData())((Tok.getEofData() == AttrEnd.getEofData()) ? static_cast< void> (0) : __assert_fail ("Tok.getEofData() == AttrEnd.getEofData()" , "/build/llvm-toolchain-snapshot-8~svn345461/tools/clang/lib/Parse/ParseExprCXX.cpp" , 3306, __PRETTY_FUNCTION__)); | |||
3307 | ConsumeAnyToken(); | |||
3308 | return ExprError(); | |||
3309 | } | |||
3310 | ||||
3311 | Tracker.consumeClose(); | |||
3312 | // Consume EOF marker for Toks buffer. | |||
3313 | assert(Tok.is(tok::eof) && Tok.getEofData() == AttrEnd.getEofData())((Tok.is(tok::eof) && Tok.getEofData() == AttrEnd.getEofData ()) ? static_cast<void> (0) : __assert_fail ("Tok.is(tok::eof) && Tok.getEofData() == AttrEnd.getEofData()" , "/build/llvm-toolchain-snapshot-8~svn345461/tools/clang/lib/Parse/ParseExprCXX.cpp" , 3313, __PRETTY_FUNCTION__)); | |||
3314 | ConsumeAnyToken(); | |||
3315 | return Result; | |||
3316 | } |