Bug Summary

File:tools/clang/lib/Parse/ParseExprCXX.cpp
Warning:line 1790, column 5
Called C++ object pointer is null

Annotated Source Code

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clang -cc1 -triple x86_64-pc-linux-gnu -analyze -disable-free -disable-llvm-verifier -discard-value-names -main-file-name ParseExprCXX.cpp -analyzer-store=region -analyzer-opt-analyze-nested-blocks -analyzer-eagerly-assume -analyzer-checker=core -analyzer-checker=apiModeling -analyzer-checker=unix -analyzer-checker=deadcode -analyzer-checker=cplusplus -analyzer-checker=security.insecureAPI.UncheckedReturn -analyzer-checker=security.insecureAPI.getpw -analyzer-checker=security.insecureAPI.gets -analyzer-checker=security.insecureAPI.mktemp -analyzer-checker=security.insecureAPI.mkstemp -analyzer-checker=security.insecureAPI.vfork -analyzer-checker=nullability.NullPassedToNonnull -analyzer-checker=nullability.NullReturnedFromNonnull -analyzer-output plist -w -mrelocation-model pic -pic-level 2 -mthread-model posix -relaxed-aliasing -fmath-errno -masm-verbose -mconstructor-aliases -munwind-tables -fuse-init-array -target-cpu x86-64 -dwarf-column-info -debugger-tuning=gdb -momit-leaf-frame-pointer -ffunction-sections -fdata-sections -resource-dir /usr/lib/llvm-7/lib/clang/7.0.0 -D _DEBUG -D _GNU_SOURCE -D __STDC_CONSTANT_MACROS -D __STDC_FORMAT_MACROS -D __STDC_LIMIT_MACROS -I /build/llvm-toolchain-snapshot-7~svn338205/build-llvm/tools/clang/lib/Parse -I /build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/Parse -I /build/llvm-toolchain-snapshot-7~svn338205/tools/clang/include -I /build/llvm-toolchain-snapshot-7~svn338205/build-llvm/tools/clang/include -I /build/llvm-toolchain-snapshot-7~svn338205/build-llvm/include -I /build/llvm-toolchain-snapshot-7~svn338205/include -U NDEBUG -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/8/../../../../include/c++/8 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/8/../../../../include/x86_64-linux-gnu/c++/8 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/8/../../../../include/x86_64-linux-gnu/c++/8 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/8/../../../../include/c++/8/backward -internal-isystem /usr/include/clang/7.0.0/include/ -internal-isystem /usr/local/include -internal-isystem /usr/lib/llvm-7/lib/clang/7.0.0/include -internal-externc-isystem /usr/lib/gcc/x86_64-linux-gnu/8/include -internal-externc-isystem /usr/include/x86_64-linux-gnu -internal-externc-isystem /include -internal-externc-isystem /usr/include -O2 -Wno-unused-parameter -Wwrite-strings -Wno-missing-field-initializers -Wno-long-long -Wno-maybe-uninitialized -Wno-class-memaccess -Wno-comment -std=c++11 -fdeprecated-macro -fdebug-compilation-dir /build/llvm-toolchain-snapshot-7~svn338205/build-llvm/tools/clang/lib/Parse -ferror-limit 19 -fmessage-length 0 -fvisibility-inlines-hidden -fobjc-runtime=gcc -fno-common -fdiagnostics-show-option -vectorize-loops -vectorize-slp -analyzer-output=html -analyzer-config stable-report-filename=true -o /tmp/scan-build-2018-07-29-043837-17923-1 -x c++ /build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/Parse/ParseExprCXX.cpp -faddrsig
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
26using namespace clang;
27
28static 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-7~svn338205/tools/clang/lib/Parse/ParseExprCXX.cpp"
, 38)
;
39 }
40}
41
42// Are the two tokens adjacent in the same source file?
43bool 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.
51static 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.
80void 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
147bool 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 &&(static_cast <bool> (getLangOpts().CPlusPlus &&
"Call sites of this function should be guarded by checking for C++"
) ? void (0) : __assert_fail ("getLangOpts().CPlusPlus && \"Call sites of this function should be guarded by checking for C++\""
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/Parse/ParseExprCXX.cpp"
, 155, __extension__ __PRETTY_FUNCTION__))
155 "Call sites of this function should be guarded by checking for C++")(static_cast <bool> (getLangOpts().CPlusPlus &&
"Call sites of this function should be guarded by checking for C++"
) ? void (0) : __assert_fail ("getLangOpts().CPlusPlus && \"Call sites of this function should be guarded by checking for C++\""
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/Parse/ParseExprCXX.cpp"
, 155, __extension__ __PRETTY_FUNCTION__))
;
156
157 if (Tok.is(tok::annot_cxxscope)) {
158 assert(!LastII && "want last identifier but have already annotated scope")(static_cast <bool> (!LastII && "want last identifier but have already annotated scope"
) ? void (0) : __assert_fail ("!LastII && \"want last identifier but have already annotated scope\""
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/Parse/ParseExprCXX.cpp"
, 158, __extension__ __PRETTY_FUNCTION__))
;
159 assert(!MayBePseudoDestructor && "unexpected annot_cxxscope")(static_cast <bool> (!MayBePseudoDestructor && "unexpected annot_cxxscope"
) ? void (0) : __assert_fail ("!MayBePseudoDestructor && \"unexpected annot_cxxscope\""
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/Parse/ParseExprCXX.cpp"
, 159, __extension__ __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!")(static_cast <bool> (Tok.is(tok::coloncolon) &&
"NextToken() not working properly!") ? void (0) : __assert_fail
("Tok.is(tok::coloncolon) && \"NextToken() not working properly!\""
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/Parse/ParseExprCXX.cpp"
, 351, __extension__ __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) &&(static_cast <bool> (Tok.isOneOf(tok::coloncolon, tok::
colon) && "NextToken() not working properly!") ? void
(0) : __assert_fail ("Tok.isOneOf(tok::coloncolon, tok::colon) && \"NextToken() not working properly!\""
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/Parse/ParseExprCXX.cpp"
, 450, __extension__ __PRETTY_FUNCTION__))
450 "NextToken() not working properly!")(static_cast <bool> (Tok.isOneOf(tok::coloncolon, tok::
colon) && "NextToken() not working properly!") ? void
(0) : __assert_fail ("Tok.isOneOf(tok::coloncolon, tok::colon) && \"NextToken() not working properly!\""
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/Parse/ParseExprCXX.cpp"
, 450, __extension__ __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
547ExprResult 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///
615ExprResult 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 "(static_cast <bool> (!Result.isUnset() && "Typo correction suggested a keyword replacement "
"for a previous keyword suggestion") ? void (0) : __assert_fail
("!Result.isUnset() && \"Typo correction suggested a keyword replacement \" \"for a previous keyword suggestion\""
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/Parse/ParseExprCXX.cpp"
, 633, __extension__ __PRETTY_FUNCTION__))
633 "for a previous keyword suggestion")(static_cast <bool> (!Result.isUnset() && "Typo correction suggested a keyword replacement "
"for a previous keyword suggestion") ? void (0) : __assert_fail
("!Result.isUnset() && \"Typo correction suggested a keyword replacement \" \"for a previous keyword suggestion\""
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/Parse/ParseExprCXX.cpp"
, 633, __extension__ __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///
676ExprResult 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().
696ExprResult Parser::TryParseLambdaExpression() {
697 assert(getLangOpts().CPlusPlus11(static_cast <bool> (getLangOpts().CPlusPlus11 &&
Tok.is(tok::l_square) && "Not at the start of a possible lambda expression."
) ? void (0) : __assert_fail ("getLangOpts().CPlusPlus11 && Tok.is(tok::l_square) && \"Not at the start of a possible lambda expression.\""
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/Parse/ParseExprCXX.cpp"
, 699, __extension__ __PRETTY_FUNCTION__))
698 && Tok.is(tok::l_square)(static_cast <bool> (getLangOpts().CPlusPlus11 &&
Tok.is(tok::l_square) && "Not at the start of a possible lambda expression."
) ? void (0) : __assert_fail ("getLangOpts().CPlusPlus11 && Tok.is(tok::l_square) && \"Not at the start of a possible lambda expression.\""
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/Parse/ParseExprCXX.cpp"
, 699, __extension__ __PRETTY_FUNCTION__))
699 && "Not at the start of a possible lambda expression.")(static_cast <bool> (getLangOpts().CPlusPlus11 &&
Tok.is(tok::l_square) && "Not at the start of a possible lambda expression."
) ? void (0) : __assert_fail ("getLangOpts().CPlusPlus11 && Tok.is(tok::l_square) && \"Not at the start of a possible lambda expression.\""
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/Parse/ParseExprCXX.cpp"
, 699, __extension__ __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.
745Optional<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 '['.")(static_cast <bool> (Tok.is(tok::l_square) && "Lambda expressions begin with '['."
) ? void (0) : __assert_fail ("Tok.is(tok::l_square) && \"Lambda expressions begin with '['.\""
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/Parse/ParseExprCXX.cpp"
, 749, __extension__ __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.
1000bool 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
1031static void
1032tryConsumeMutableOrConstexprToken(Parser &P, SourceLocation &MutableLoc,
1033 SourceLocation &ConstexprLoc,
1034 SourceLocation &DeclEndLoc) {
1035 assert(MutableLoc.isInvalid())(static_cast <bool> (MutableLoc.isInvalid()) ? void (0)
: __assert_fail ("MutableLoc.isInvalid()", "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/Parse/ParseExprCXX.cpp"
, 1035, __extension__ __PRETTY_FUNCTION__))
;
1036 assert(ConstexprLoc.isInvalid())(static_cast <bool> (ConstexprLoc.isInvalid()) ? void (
0) : __assert_fail ("ConstexprLoc.isInvalid()", "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/Parse/ParseExprCXX.cpp"
, 1036, __extension__ __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
1068static void
1069addConstexprToLambdaDeclSpecifier(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 &&(static_cast <bool> (PrevSpec == nullptr && DiagID
== 0 && "Constexpr cannot have been set previously!"
) ? void (0) : __assert_fail ("PrevSpec == nullptr && DiagID == 0 && \"Constexpr cannot have been set previously!\""
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/Parse/ParseExprCXX.cpp"
, 1079, __extension__ __PRETTY_FUNCTION__))
1079 "Constexpr cannot have been set previously!")(static_cast <bool> (PrevSpec == nullptr && DiagID
== 0 && "Constexpr cannot have been set previously!"
) ? void (0) : __assert_fail ("PrevSpec == nullptr && DiagID == 0 && \"Constexpr cannot have been set previously!\""
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/Parse/ParseExprCXX.cpp"
, 1079, __extension__ __PRETTY_FUNCTION__))
;
1080 }
1081}
1082
1083/// ParseLambdaExpressionAfterIntroducer - Parse the rest of a lambda
1084/// expression.
1085ExprResult 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-7~svn338205/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///
1326ExprResult 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-7~svn338205/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///
1391ExprResult Parser::ParseCXXTypeid() {
1392 assert(Tok.is(tok::kw_typeid) && "Not 'typeid'!")(static_cast <bool> (Tok.is(tok::kw_typeid) && "Not 'typeid'!"
) ? void (0) : __assert_fail ("Tok.is(tok::kw_typeid) && \"Not 'typeid'!\""
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/Parse/ParseExprCXX.cpp"
, 1392, __extension__ __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///
1458ExprResult Parser::ParseCXXUuidof() {
1459 assert(Tok.is(tok::kw___uuidof) && "Not '__uuidof'!")(static_cast <bool> (Tok.is(tok::kw___uuidof) &&
"Not '__uuidof'!") ? void (0) : __assert_fail ("Tok.is(tok::kw___uuidof) && \"Not '__uuidof'!\""
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/Parse/ParseExprCXX.cpp"
, 1459, __extension__ __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///
1516ExprResult
1517Parser::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")(static_cast <bool> (Tok.is(tok::coloncolon) &&
"ParseOptionalCXXScopeSpecifier fail") ? void (0) : __assert_fail
("Tok.is(tok::coloncolon) &&\"ParseOptionalCXXScopeSpecifier fail\""
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/Parse/ParseExprCXX.cpp"
, 1534, __extension__ __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")(static_cast <bool> (Tok.is(tok::coloncolon) &&
"ParseOptionalCXXScopeSpecifier fail") ? void (0) : __assert_fail
("Tok.is(tok::coloncolon) &&\"ParseOptionalCXXScopeSpecifier fail\""
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/Parse/ParseExprCXX.cpp"
, 1542, __extension__ __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")(static_cast <bool> (Tok.is(tok::tilde) && "ParseOptionalCXXScopeSpecifier fail"
) ? void (0) : __assert_fail ("Tok.is(tok::tilde) && \"ParseOptionalCXXScopeSpecifier fail\""
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/Parse/ParseExprCXX.cpp"
, 1549, __extension__ __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'
1591ExprResult 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]
1600ExprResult Parser::ParseThrowExpression() {
1601 assert(Tok.is(tok::kw_throw) && "Not throw!")(static_cast <bool> (Tok.is(tok::kw_throw) && "Not throw!"
) ? void (0) : __assert_fail ("Tok.is(tok::kw_throw) && \"Not throw!\""
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/Parse/ParseExprCXX.cpp"
, 1601, __extension__ __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]
1627ExprResult Parser::ParseCoyieldExpression() {
1628 assert(Tok.is(tok::kw_co_yield) && "Not co_yield!")(static_cast <bool> (Tok.is(tok::kw_co_yield) &&
"Not co_yield!") ? void (0) : __assert_fail ("Tok.is(tok::kw_co_yield) && \"Not co_yield!\""
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/Parse/ParseExprCXX.cpp"
, 1628, __extension__ __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.
1643ExprResult Parser::ParseCXXThis() {
1644 assert(Tok.is(tok::kw_this) && "Not 'this'!")(static_cast <bool> (Tok.is(tok::kw_this) && "Not 'this'!"
) ? void (0) : __assert_fail ("Tok.is(tok::kw_this) && \"Not 'this'!\""
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/Parse/ParseExprCXX.cpp"
, 1644, __extension__ __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.
1662ExprResult
1663Parser::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) ||(static_cast <bool> ((Tok.is(tok::l_paren) || (getLangOpts
().CPlusPlus11 && Tok.is(tok::l_brace))) && "Expected '(' or '{'!"
) ? void (0) : __assert_fail ("(Tok.is(tok::l_paren) || (getLangOpts().CPlusPlus11 && Tok.is(tok::l_brace))) && \"Expected '(' or '{'!\""
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/Parse/ParseExprCXX.cpp"
, 1669, __extension__ __PRETTY_FUNCTION__))
1668 (getLangOpts().CPlusPlus11 && Tok.is(tok::l_brace)))(static_cast <bool> ((Tok.is(tok::l_paren) || (getLangOpts
().CPlusPlus11 && Tok.is(tok::l_brace))) && "Expected '(' or '{'!"
) ? void (0) : __assert_fail ("(Tok.is(tok::l_paren) || (getLangOpts().CPlusPlus11 && Tok.is(tok::l_brace))) && \"Expected '(' or '{'!\""
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/Parse/ParseExprCXX.cpp"
, 1669, __extension__ __PRETTY_FUNCTION__))
1669 && "Expected '(' or '{'!")(static_cast <bool> ((Tok.is(tok::l_paren) || (getLangOpts
().CPlusPlus11 && Tok.is(tok::l_brace))) && "Expected '(' or '{'!"
) ? void (0) : __assert_fail ("(Tok.is(tok::l_paren) || (getLangOpts().CPlusPlus11 && Tok.is(tok::l_brace))) && \"Expected '(' or '{'!\""
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/Parse/ParseExprCXX.cpp"
, 1669, __extension__ __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->getLocStart(), MultiExprArg(&InitList, 1),
1678 InitList->getLocEnd(), /*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 Actions.CodeCompleteConstructor(getCurScope(),
1689 TypeRep.get()->getCanonicalTypeInternal(),
1690 DS.getLocEnd(), Exprs);
1691 })) {
1692 SkipUntil(tok::r_paren, StopAtSemi);
1693 return ExprError();
1694 }
1695 }
1696
1697 // Match the ')'.
1698 T.consumeClose();
1699
1700 // TypeRep could be null, if it references an invalid typedef.
1701 if (!TypeRep)
1702 return ExprError();
1703
1704 assert((Exprs.size() == 0 || Exprs.size()-1 == CommaLocs.size())&&(static_cast <bool> ((Exprs.size() == 0 || Exprs.size()
-1 == CommaLocs.size())&& "Unexpected number of commas!"
) ? void (0) : __assert_fail ("(Exprs.size() == 0 || Exprs.size()-1 == CommaLocs.size())&& \"Unexpected number of commas!\""
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/Parse/ParseExprCXX.cpp"
, 1705, __extension__ __PRETTY_FUNCTION__))
1705 "Unexpected number of commas!")(static_cast <bool> ((Exprs.size() == 0 || Exprs.size()
-1 == CommaLocs.size())&& "Unexpected number of commas!"
) ? void (0) : __assert_fail ("(Exprs.size() == 0 || Exprs.size()-1 == CommaLocs.size())&& \"Unexpected number of commas!\""
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/Parse/ParseExprCXX.cpp"
, 1705, __extension__ __PRETTY_FUNCTION__))
;
1706 return Actions.ActOnCXXTypeConstructExpr(TypeRep, T.getOpenLocation(),
1707 Exprs, T.getCloseLocation(),
1708 /*ListInitialization=*/false);
1709 }
1710}
1711
1712/// ParseCXXCondition - if/switch/while condition expression.
1713///
1714/// condition:
1715/// expression
1716/// type-specifier-seq declarator '=' assignment-expression
1717/// [C++11] type-specifier-seq declarator '=' initializer-clause
1718/// [C++11] type-specifier-seq declarator braced-init-list
1719/// [Clang] type-specifier-seq ref-qualifier[opt] '[' identifier-list ']'
1720/// brace-or-equal-initializer
1721/// [GNU] type-specifier-seq declarator simple-asm-expr[opt] attributes[opt]
1722/// '=' assignment-expression
1723///
1724/// In C++1z, a condition may in some contexts be preceded by an
1725/// optional init-statement. This function will parse that too.
1726///
1727/// \param InitStmt If non-null, an init-statement is permitted, and if present
1728/// will be parsed and stored here.
1729///
1730/// \param Loc The location of the start of the statement that requires this
1731/// condition, e.g., the "for" in a for loop.
1732///
1733/// \returns The parsed condition.
1734Sema::ConditionResult Parser::ParseCXXCondition(StmtResult *InitStmt,
1735 SourceLocation Loc,
1736 Sema::ConditionKind CK) {
1737 ParenBraceBracketBalancer BalancerRAIIObj(*this);
1738
1739 if (Tok.is(tok::code_completion)) {
1
Taking false branch
5
Taking false branch
1740 Actions.CodeCompleteOrdinaryName(getCurScope(), Sema::PCC_Condition);
1741 cutOffParsing();
1742 return Sema::ConditionError();
1743 }
1744
1745 ParsedAttributesWithRange attrs(AttrFactory);
1746 MaybeParseCXX11Attributes(attrs);
1747
1748 const auto WarnOnInit = [this, &CK] {
1749 Diag(Tok.getLocation(), getLangOpts().CPlusPlus17
1750 ? diag::warn_cxx14_compat_init_statement
1751 : diag::ext_init_statement)
1752 << (CK == Sema::ConditionKind::Switch);
1753 };
1754
1755 // Determine what kind of thing we have.
1756 switch (isCXXConditionDeclarationOrInitStatement(InitStmt)) {
2
Control jumps to 'case InitStmtDecl:' at line 1784
6
Control jumps to 'case InitStmtDecl:' at line 1784
1757 case ConditionOrInitStatement::Expression: {
1758 ProhibitAttributes(attrs);
1759
1760 // We can have an empty expression here.
1761 // if (; true);
1762 if (InitStmt && Tok.is(tok::semi)) {
1763 WarnOnInit();
1764 SourceLocation SemiLoc = ConsumeToken();
1765 *InitStmt = Actions.ActOnNullStmt(SemiLoc);
1766 return ParseCXXCondition(nullptr, Loc, CK);
1767 }
1768
1769 // Parse the expression.
1770 ExprResult Expr = ParseExpression(); // expression
1771 if (Expr.isInvalid())
1772 return Sema::ConditionError();
1773
1774 if (InitStmt && Tok.is(tok::semi)) {
1775 WarnOnInit();
1776 *InitStmt = Actions.ActOnExprStmt(Expr.get());
1777 ConsumeToken();
1778 return ParseCXXCondition(nullptr, Loc, CK);
1779 }
1780
1781 return Actions.ActOnCondition(getCurScope(), Loc, Expr.get(), CK);
1782 }
1783
1784 case ConditionOrInitStatement::InitStmtDecl: {
1785 WarnOnInit();
1786 SourceLocation DeclStart = Tok.getLocation(), DeclEnd;
1787 DeclGroupPtrTy DG =
1788 ParseSimpleDeclaration(DeclaratorContext::InitStmtContext, DeclEnd,
1789 attrs, /*RequireSemi=*/true);
1790 *InitStmt = Actions.ActOnDeclStmt(DG, DeclStart, DeclEnd);
7
Called C++ object pointer is null
1791 return ParseCXXCondition(nullptr, Loc, CK);
3
Passing null pointer value via 1st parameter 'InitStmt'
4
Calling 'Parser::ParseCXXCondition'
1792 }
1793
1794 case ConditionOrInitStatement::ConditionDecl:
1795 case ConditionOrInitStatement::Error:
1796 break;
1797 }
1798
1799 // type-specifier-seq
1800 DeclSpec DS(AttrFactory);
1801 DS.takeAttributesFrom(attrs);
1802 ParseSpecifierQualifierList(DS, AS_none, DeclSpecContext::DSC_condition);
1803
1804 // declarator
1805 Declarator DeclaratorInfo(DS, DeclaratorContext::ConditionContext);
1806 ParseDeclarator(DeclaratorInfo);
1807
1808 // simple-asm-expr[opt]
1809 if (Tok.is(tok::kw_asm)) {
1810 SourceLocation Loc;
1811 ExprResult AsmLabel(ParseSimpleAsm(&Loc));
1812 if (AsmLabel.isInvalid()) {
1813 SkipUntil(tok::semi, StopAtSemi);
1814 return Sema::ConditionError();
1815 }
1816 DeclaratorInfo.setAsmLabel(AsmLabel.get());
1817 DeclaratorInfo.SetRangeEnd(Loc);
1818 }
1819
1820 // If attributes are present, parse them.
1821 MaybeParseGNUAttributes(DeclaratorInfo);
1822
1823 // Type-check the declaration itself.
1824 DeclResult Dcl = Actions.ActOnCXXConditionDeclaration(getCurScope(),
1825 DeclaratorInfo);
1826 if (Dcl.isInvalid())
1827 return Sema::ConditionError();
1828 Decl *DeclOut = Dcl.get();
1829
1830 // '=' assignment-expression
1831 // If a '==' or '+=' is found, suggest a fixit to '='.
1832 bool CopyInitialization = isTokenEqualOrEqualTypo();
1833 if (CopyInitialization)
1834 ConsumeToken();
1835
1836 ExprResult InitExpr = ExprError();
1837 if (getLangOpts().CPlusPlus11 && Tok.is(tok::l_brace)) {
1838 Diag(Tok.getLocation(),
1839 diag::warn_cxx98_compat_generalized_initializer_lists);
1840 InitExpr = ParseBraceInitializer();
1841 } else if (CopyInitialization) {
1842 InitExpr = ParseAssignmentExpression();
1843 } else if (Tok.is(tok::l_paren)) {
1844 // This was probably an attempt to initialize the variable.
1845 SourceLocation LParen = ConsumeParen(), RParen = LParen;
1846 if (SkipUntil(tok::r_paren, StopAtSemi | StopBeforeMatch))
1847 RParen = ConsumeParen();
1848 Diag(DeclOut->getLocation(),
1849 diag::err_expected_init_in_condition_lparen)
1850 << SourceRange(LParen, RParen);
1851 } else {
1852 Diag(DeclOut->getLocation(), diag::err_expected_init_in_condition);
1853 }
1854
1855 if (!InitExpr.isInvalid())
1856 Actions.AddInitializerToDecl(DeclOut, InitExpr.get(), !CopyInitialization);
1857 else
1858 Actions.ActOnInitializerError(DeclOut);
1859
1860 Actions.FinalizeDeclaration(DeclOut);
1861 return Actions.ActOnConditionVariable(DeclOut, Loc, CK);
1862}
1863
1864/// ParseCXXSimpleTypeSpecifier - [C++ 7.1.5.2] Simple type specifiers.
1865/// This should only be called when the current token is known to be part of
1866/// simple-type-specifier.
1867///
1868/// simple-type-specifier:
1869/// '::'[opt] nested-name-specifier[opt] type-name
1870/// '::'[opt] nested-name-specifier 'template' simple-template-id [TODO]
1871/// char
1872/// wchar_t
1873/// bool
1874/// short
1875/// int
1876/// long
1877/// signed
1878/// unsigned
1879/// float
1880/// double
1881/// void
1882/// [GNU] typeof-specifier
1883/// [C++0x] auto [TODO]
1884///
1885/// type-name:
1886/// class-name
1887/// enum-name
1888/// typedef-name
1889///
1890void Parser::ParseCXXSimpleTypeSpecifier(DeclSpec &DS) {
1891 DS.SetRangeStart(Tok.getLocation());
1892 const char *PrevSpec;
1893 unsigned DiagID;
1894 SourceLocation Loc = Tok.getLocation();
1895 const clang::PrintingPolicy &Policy =
1896 Actions.getASTContext().getPrintingPolicy();
1897
1898 switch (Tok.getKind()) {
1899 case tok::identifier: // foo::bar
1900 case tok::coloncolon: // ::foo::bar
1901 llvm_unreachable("Annotation token should already be formed!")::llvm::llvm_unreachable_internal("Annotation token should already be formed!"
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/Parse/ParseExprCXX.cpp"
, 1901)
;
1902 default:
1903 llvm_unreachable("Not a simple-type-specifier token!")::llvm::llvm_unreachable_internal("Not a simple-type-specifier token!"
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/Parse/ParseExprCXX.cpp"
, 1903)
;
1904
1905 // type-name
1906 case tok::annot_typename: {
1907 if (getTypeAnnotation(Tok))
1908 DS.SetTypeSpecType(DeclSpec::TST_typename, Loc, PrevSpec, DiagID,
1909 getTypeAnnotation(Tok), Policy);
1910 else
1911 DS.SetTypeSpecError();
1912
1913 DS.SetRangeEnd(Tok.getAnnotationEndLoc());
1914 ConsumeAnnotationToken();
1915
1916 DS.Finish(Actions, Policy);
1917 return;
1918 }
1919
1920 // builtin types
1921 case tok::kw_short:
1922 DS.SetTypeSpecWidth(DeclSpec::TSW_short, Loc, PrevSpec, DiagID, Policy);
1923 break;
1924 case tok::kw_long:
1925 DS.SetTypeSpecWidth(DeclSpec::TSW_long, Loc, PrevSpec, DiagID, Policy);
1926 break;
1927 case tok::kw___int64:
1928 DS.SetTypeSpecWidth(DeclSpec::TSW_longlong, Loc, PrevSpec, DiagID, Policy);
1929 break;
1930 case tok::kw_signed:
1931 DS.SetTypeSpecSign(DeclSpec::TSS_signed, Loc, PrevSpec, DiagID);
1932 break;
1933 case tok::kw_unsigned:
1934 DS.SetTypeSpecSign(DeclSpec::TSS_unsigned, Loc, PrevSpec, DiagID);
1935 break;
1936 case tok::kw_void:
1937 DS.SetTypeSpecType(DeclSpec::TST_void, Loc, PrevSpec, DiagID, Policy);
1938 break;
1939 case tok::kw_char:
1940 DS.SetTypeSpecType(DeclSpec::TST_char, Loc, PrevSpec, DiagID, Policy);
1941 break;
1942 case tok::kw_int:
1943 DS.SetTypeSpecType(DeclSpec::TST_int, Loc, PrevSpec, DiagID, Policy);
1944 break;
1945 case tok::kw___int128:
1946 DS.SetTypeSpecType(DeclSpec::TST_int128, Loc, PrevSpec, DiagID, Policy);
1947 break;
1948 case tok::kw_half:
1949 DS.SetTypeSpecType(DeclSpec::TST_half, Loc, PrevSpec, DiagID, Policy);
1950 break;
1951 case tok::kw_float:
1952 DS.SetTypeSpecType(DeclSpec::TST_float, Loc, PrevSpec, DiagID, Policy);
1953 break;
1954 case tok::kw_double:
1955 DS.SetTypeSpecType(DeclSpec::TST_double, Loc, PrevSpec, DiagID, Policy);
1956 break;
1957 case tok::kw__Float16:
1958 DS.SetTypeSpecType(DeclSpec::TST_float16, Loc, PrevSpec, DiagID, Policy);
1959 break;
1960 case tok::kw___float128:
1961 DS.SetTypeSpecType(DeclSpec::TST_float128, Loc, PrevSpec, DiagID, Policy);
1962 break;
1963 case tok::kw_wchar_t:
1964 DS.SetTypeSpecType(DeclSpec::TST_wchar, Loc, PrevSpec, DiagID, Policy);
1965 break;
1966 case tok::kw_char8_t:
1967 DS.SetTypeSpecType(DeclSpec::TST_char8, Loc, PrevSpec, DiagID, Policy);
1968 break;
1969 case tok::kw_char16_t:
1970 DS.SetTypeSpecType(DeclSpec::TST_char16, Loc, PrevSpec, DiagID, Policy);
1971 break;
1972 case tok::kw_char32_t:
1973 DS.SetTypeSpecType(DeclSpec::TST_char32, Loc, PrevSpec, DiagID, Policy);
1974 break;
1975 case tok::kw_bool:
1976 DS.SetTypeSpecType(DeclSpec::TST_bool, Loc, PrevSpec, DiagID, Policy);
1977 break;
1978 case tok::annot_decltype:
1979 case tok::kw_decltype:
1980 DS.SetRangeEnd(ParseDecltypeSpecifier(DS));
1981 return DS.Finish(Actions, Policy);
1982
1983 // GNU typeof support.
1984 case tok::kw_typeof:
1985 ParseTypeofSpecifier(DS);
1986 DS.Finish(Actions, Policy);
1987 return;
1988 }
1989 ConsumeAnyToken();
1990 DS.SetRangeEnd(PrevTokLocation);
1991 DS.Finish(Actions, Policy);
1992}
1993
1994/// ParseCXXTypeSpecifierSeq - Parse a C++ type-specifier-seq (C++
1995/// [dcl.name]), which is a non-empty sequence of type-specifiers,
1996/// e.g., "const short int". Note that the DeclSpec is *not* finished
1997/// by parsing the type-specifier-seq, because these sequences are
1998/// typically followed by some form of declarator. Returns true and
1999/// emits diagnostics if this is not a type-specifier-seq, false
2000/// otherwise.
2001///
2002/// type-specifier-seq: [C++ 8.1]
2003/// type-specifier type-specifier-seq[opt]
2004///
2005bool Parser::ParseCXXTypeSpecifierSeq(DeclSpec &DS) {
2006 ParseSpecifierQualifierList(DS, AS_none, DeclSpecContext::DSC_type_specifier);
2007 DS.Finish(Actions, Actions.getASTContext().getPrintingPolicy());
2008 return false;
2009}
2010
2011/// Finish parsing a C++ unqualified-id that is a template-id of
2012/// some form.
2013///
2014/// This routine is invoked when a '<' is encountered after an identifier or
2015/// operator-function-id is parsed by \c ParseUnqualifiedId() to determine
2016/// whether the unqualified-id is actually a template-id. This routine will
2017/// then parse the template arguments and form the appropriate template-id to
2018/// return to the caller.
2019///
2020/// \param SS the nested-name-specifier that precedes this template-id, if
2021/// we're actually parsing a qualified-id.
2022///
2023/// \param Name for constructor and destructor names, this is the actual
2024/// identifier that may be a template-name.
2025///
2026/// \param NameLoc the location of the class-name in a constructor or
2027/// destructor.
2028///
2029/// \param EnteringContext whether we're entering the scope of the
2030/// nested-name-specifier.
2031///
2032/// \param ObjectType if this unqualified-id occurs within a member access
2033/// expression, the type of the base object whose member is being accessed.
2034///
2035/// \param Id as input, describes the template-name or operator-function-id
2036/// that precedes the '<'. If template arguments were parsed successfully,
2037/// will be updated with the template-id.
2038///
2039/// \param AssumeTemplateId When true, this routine will assume that the name
2040/// refers to a template without performing name lookup to verify.
2041///
2042/// \returns true if a parse error occurred, false otherwise.
2043bool Parser::ParseUnqualifiedIdTemplateId(CXXScopeSpec &SS,
2044 SourceLocation TemplateKWLoc,
2045 IdentifierInfo *Name,
2046 SourceLocation NameLoc,
2047 bool EnteringContext,
2048 ParsedType ObjectType,
2049 UnqualifiedId &Id,
2050 bool AssumeTemplateId) {
2051 assert(Tok.is(tok::less) && "Expected '<' to finish parsing a template-id")(static_cast <bool> (Tok.is(tok::less) && "Expected '<' to finish parsing a template-id"
) ? void (0) : __assert_fail ("Tok.is(tok::less) && \"Expected '<' to finish parsing a template-id\""
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/Parse/ParseExprCXX.cpp"
, 2051, __extension__ __PRETTY_FUNCTION__))
;
2052
2053 TemplateTy Template;
2054 TemplateNameKind TNK = TNK_Non_template;
2055 switch (Id.getKind()) {
2056 case UnqualifiedIdKind::IK_Identifier:
2057 case UnqualifiedIdKind::IK_OperatorFunctionId:
2058 case UnqualifiedIdKind::IK_LiteralOperatorId:
2059 if (AssumeTemplateId) {
2060 // We defer the injected-class-name checks until we've found whether
2061 // this template-id is used to form a nested-name-specifier or not.
2062 TNK = Actions.ActOnDependentTemplateName(
2063 getCurScope(), SS, TemplateKWLoc, Id, ObjectType, EnteringContext,
2064 Template, /*AllowInjectedClassName*/ true);
2065 if (TNK == TNK_Non_template)
2066 return true;
2067 } else {
2068 bool MemberOfUnknownSpecialization;
2069 TNK = Actions.isTemplateName(getCurScope(), SS,
2070 TemplateKWLoc.isValid(), Id,
2071 ObjectType, EnteringContext, Template,
2072 MemberOfUnknownSpecialization);
2073
2074 if (TNK == TNK_Non_template && MemberOfUnknownSpecialization &&
2075 ObjectType && IsTemplateArgumentList()) {
2076 // We have something like t->getAs<T>(), where getAs is a
2077 // member of an unknown specialization. However, this will only
2078 // parse correctly as a template, so suggest the keyword 'template'
2079 // before 'getAs' and treat this as a dependent template name.
2080 std::string Name;
2081 if (Id.getKind() == UnqualifiedIdKind::IK_Identifier)
2082 Name = Id.Identifier->getName();
2083 else {
2084 Name = "operator ";
2085 if (Id.getKind() == UnqualifiedIdKind::IK_OperatorFunctionId)
2086 Name += getOperatorSpelling(Id.OperatorFunctionId.Operator);
2087 else
2088 Name += Id.Identifier->getName();
2089 }
2090 Diag(Id.StartLocation, diag::err_missing_dependent_template_keyword)
2091 << Name
2092 << FixItHint::CreateInsertion(Id.StartLocation, "template ");
2093 TNK = Actions.ActOnDependentTemplateName(
2094 getCurScope(), SS, TemplateKWLoc, Id, ObjectType, EnteringContext,
2095 Template, /*AllowInjectedClassName*/ true);
2096 if (TNK == TNK_Non_template)
2097 return true;
2098 }
2099 }
2100 break;
2101
2102 case UnqualifiedIdKind::IK_ConstructorName: {
2103 UnqualifiedId TemplateName;
2104 bool MemberOfUnknownSpecialization;
2105 TemplateName.setIdentifier(Name, NameLoc);
2106 TNK = Actions.isTemplateName(getCurScope(), SS, TemplateKWLoc.isValid(),
2107 TemplateName, ObjectType,
2108 EnteringContext, Template,
2109 MemberOfUnknownSpecialization);
2110 break;
2111 }
2112
2113 case UnqualifiedIdKind::IK_DestructorName: {
2114 UnqualifiedId TemplateName;
2115 bool MemberOfUnknownSpecialization;
2116 TemplateName.setIdentifier(Name, NameLoc);
2117 if (ObjectType) {
2118 TNK = Actions.ActOnDependentTemplateName(
2119 getCurScope(), SS, TemplateKWLoc, TemplateName, ObjectType,
2120 EnteringContext, Template, /*AllowInjectedClassName*/ true);
2121 if (TNK == TNK_Non_template)
2122 return true;
2123 } else {
2124 TNK = Actions.isTemplateName(getCurScope(), SS, TemplateKWLoc.isValid(),
2125 TemplateName, ObjectType,
2126 EnteringContext, Template,
2127 MemberOfUnknownSpecialization);
2128
2129 if (TNK == TNK_Non_template && !Id.DestructorName.get()) {
2130 Diag(NameLoc, diag::err_destructor_template_id)
2131 << Name << SS.getRange();
2132 return true;
2133 }
2134 }
2135 break;
2136 }
2137
2138 default:
2139 return false;
2140 }
2141
2142 if (TNK == TNK_Non_template)
2143 return false;
2144
2145 // Parse the enclosed template argument list.
2146 SourceLocation LAngleLoc, RAngleLoc;
2147 TemplateArgList TemplateArgs;
2148 if (ParseTemplateIdAfterTemplateName(true, LAngleLoc, TemplateArgs,
2149 RAngleLoc))
2150 return true;
2151
2152 if (Id.getKind() == UnqualifiedIdKind::IK_Identifier ||
2153 Id.getKind() == UnqualifiedIdKind::IK_OperatorFunctionId ||
2154 Id.getKind() == UnqualifiedIdKind::IK_LiteralOperatorId) {
2155 // Form a parsed representation of the template-id to be stored in the
2156 // UnqualifiedId.
2157
2158 // FIXME: Store name for literal operator too.
2159 IdentifierInfo *TemplateII =
2160 Id.getKind() == UnqualifiedIdKind::IK_Identifier ? Id.Identifier
2161 : nullptr;
2162 OverloadedOperatorKind OpKind =
2163 Id.getKind() == UnqualifiedIdKind::IK_Identifier
2164 ? OO_None
2165 : Id.OperatorFunctionId.Operator;
2166
2167 TemplateIdAnnotation *TemplateId = TemplateIdAnnotation::Create(
2168 SS, TemplateKWLoc, Id.StartLocation, TemplateII, OpKind, Template, TNK,
2169 LAngleLoc, RAngleLoc, TemplateArgs, TemplateIds);
2170
2171 Id.setTemplateId(TemplateId);
2172 return false;
2173 }
2174
2175 // Bundle the template arguments together.
2176 ASTTemplateArgsPtr TemplateArgsPtr(TemplateArgs);
2177
2178 // Constructor and destructor names.
2179 TypeResult Type
2180 = Actions.ActOnTemplateIdType(SS, TemplateKWLoc,
2181 Template, Name, NameLoc,
2182 LAngleLoc, TemplateArgsPtr, RAngleLoc,
2183 /*IsCtorOrDtorName=*/true);
2184 if (Type.isInvalid())
2185 return true;
2186
2187 if (Id.getKind() == UnqualifiedIdKind::IK_ConstructorName)
2188 Id.setConstructorName(Type.get(), NameLoc, RAngleLoc);
2189 else
2190 Id.setDestructorName(Id.StartLocation, Type.get(), RAngleLoc);
2191
2192 return false;
2193}
2194
2195/// Parse an operator-function-id or conversion-function-id as part
2196/// of a C++ unqualified-id.
2197///
2198/// This routine is responsible only for parsing the operator-function-id or
2199/// conversion-function-id; it does not handle template arguments in any way.
2200///
2201/// \code
2202/// operator-function-id: [C++ 13.5]
2203/// 'operator' operator
2204///
2205/// operator: one of
2206/// new delete new[] delete[]
2207/// + - * / % ^ & | ~
2208/// ! = < > += -= *= /= %=
2209/// ^= &= |= << >> >>= <<= == !=
2210/// <= >= && || ++ -- , ->* ->
2211/// () [] <=>
2212///
2213/// conversion-function-id: [C++ 12.3.2]
2214/// operator conversion-type-id
2215///
2216/// conversion-type-id:
2217/// type-specifier-seq conversion-declarator[opt]
2218///
2219/// conversion-declarator:
2220/// ptr-operator conversion-declarator[opt]
2221/// \endcode
2222///
2223/// \param SS The nested-name-specifier that preceded this unqualified-id. If
2224/// non-empty, then we are parsing the unqualified-id of a qualified-id.
2225///
2226/// \param EnteringContext whether we are entering the scope of the
2227/// nested-name-specifier.
2228///
2229/// \param ObjectType if this unqualified-id occurs within a member access
2230/// expression, the type of the base object whose member is being accessed.
2231///
2232/// \param Result on a successful parse, contains the parsed unqualified-id.
2233///
2234/// \returns true if parsing fails, false otherwise.
2235bool Parser::ParseUnqualifiedIdOperator(CXXScopeSpec &SS, bool EnteringContext,
2236 ParsedType ObjectType,
2237 UnqualifiedId &Result) {
2238 assert(Tok.is(tok::kw_operator) && "Expected 'operator' keyword")(static_cast <bool> (Tok.is(tok::kw_operator) &&
"Expected 'operator' keyword") ? void (0) : __assert_fail ("Tok.is(tok::kw_operator) && \"Expected 'operator' keyword\""
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/Parse/ParseExprCXX.cpp"
, 2238, __extension__ __PRETTY_FUNCTION__))
;
2239
2240 // Consume the 'operator' keyword.
2241 SourceLocation KeywordLoc = ConsumeToken();
2242
2243 // Determine what kind of operator name we have.
2244 unsigned SymbolIdx = 0;
2245 SourceLocation SymbolLocations[3];
2246 OverloadedOperatorKind Op = OO_None;
2247 switch (Tok.getKind()) {
2248 case tok::kw_new:
2249 case tok::kw_delete: {
2250 bool isNew = Tok.getKind() == tok::kw_new;
2251 // Consume the 'new' or 'delete'.
2252 SymbolLocations[SymbolIdx++] = ConsumeToken();
2253 // Check for array new/delete.
2254 if (Tok.is(tok::l_square) &&
2255 (!getLangOpts().CPlusPlus11 || NextToken().isNot(tok::l_square))) {
2256 // Consume the '[' and ']'.
2257 BalancedDelimiterTracker T(*this, tok::l_square);
2258 T.consumeOpen();
2259 T.consumeClose();
2260 if (T.getCloseLocation().isInvalid())
2261 return true;
2262
2263 SymbolLocations[SymbolIdx++] = T.getOpenLocation();
2264 SymbolLocations[SymbolIdx++] = T.getCloseLocation();
2265 Op = isNew? OO_Array_New : OO_Array_Delete;
2266 } else {
2267 Op = isNew? OO_New : OO_Delete;
2268 }
2269 break;
2270 }
2271
2272#define OVERLOADED_OPERATOR(Name,Spelling,Token,Unary,Binary,MemberOnly) \
2273 case tok::Token: \
2274 SymbolLocations[SymbolIdx++] = ConsumeToken(); \
2275 Op = OO_##Name; \
2276 break;
2277#define OVERLOADED_OPERATOR_MULTI(Name,Spelling,Unary,Binary,MemberOnly)
2278#include "clang/Basic/OperatorKinds.def"
2279
2280 case tok::l_paren: {
2281 // Consume the '(' and ')'.
2282 BalancedDelimiterTracker T(*this, tok::l_paren);
2283 T.consumeOpen();
2284 T.consumeClose();
2285 if (T.getCloseLocation().isInvalid())
2286 return true;
2287
2288 SymbolLocations[SymbolIdx++] = T.getOpenLocation();
2289 SymbolLocations[SymbolIdx++] = T.getCloseLocation();
2290 Op = OO_Call;
2291 break;
2292 }
2293
2294 case tok::l_square: {
2295 // Consume the '[' and ']'.
2296 BalancedDelimiterTracker T(*this, tok::l_square);
2297 T.consumeOpen();
2298 T.consumeClose();
2299 if (T.getCloseLocation().isInvalid())
2300 return true;
2301
2302 SymbolLocations[SymbolIdx++] = T.getOpenLocation();
2303 SymbolLocations[SymbolIdx++] = T.getCloseLocation();
2304 Op = OO_Subscript;
2305 break;
2306 }
2307
2308 case tok::code_completion: {
2309 // Code completion for the operator name.
2310 Actions.CodeCompleteOperatorName(getCurScope());
2311 cutOffParsing();
2312 // Don't try to parse any further.
2313 return true;
2314 }
2315
2316 default:
2317 break;
2318 }
2319
2320 if (Op != OO_None) {
2321 // We have parsed an operator-function-id.
2322 Result.setOperatorFunctionId(KeywordLoc, Op, SymbolLocations);
2323 return false;
2324 }
2325
2326 // Parse a literal-operator-id.
2327 //
2328 // literal-operator-id: C++11 [over.literal]
2329 // operator string-literal identifier
2330 // operator user-defined-string-literal
2331
2332 if (getLangOpts().CPlusPlus11 && isTokenStringLiteral()) {
2333 Diag(Tok.getLocation(), diag::warn_cxx98_compat_literal_operator);
2334
2335 SourceLocation DiagLoc;
2336 unsigned DiagId = 0;
2337
2338 // We're past translation phase 6, so perform string literal concatenation
2339 // before checking for "".
2340 SmallVector<Token, 4> Toks;
2341 SmallVector<SourceLocation, 4> TokLocs;
2342 while (isTokenStringLiteral()) {
2343 if (!Tok.is(tok::string_literal) && !DiagId) {
2344 // C++11 [over.literal]p1:
2345 // The string-literal or user-defined-string-literal in a
2346 // literal-operator-id shall have no encoding-prefix [...].
2347 DiagLoc = Tok.getLocation();
2348 DiagId = diag::err_literal_operator_string_prefix;
2349 }
2350 Toks.push_back(Tok);
2351 TokLocs.push_back(ConsumeStringToken());
2352 }
2353
2354 StringLiteralParser Literal(Toks, PP);
2355 if (Literal.hadError)
2356 return true;
2357
2358 // Grab the literal operator's suffix, which will be either the next token
2359 // or a ud-suffix from the string literal.
2360 IdentifierInfo *II = nullptr;
2361 SourceLocation SuffixLoc;
2362 if (!Literal.getUDSuffix().empty()) {
2363 II = &PP.getIdentifierTable().get(Literal.getUDSuffix());
2364 SuffixLoc =
2365 Lexer::AdvanceToTokenCharacter(TokLocs[Literal.getUDSuffixToken()],
2366 Literal.getUDSuffixOffset(),
2367 PP.getSourceManager(), getLangOpts());
2368 } else if (Tok.is(tok::identifier)) {
2369 II = Tok.getIdentifierInfo();
2370 SuffixLoc = ConsumeToken();
2371 TokLocs.push_back(SuffixLoc);
2372 } else {
2373 Diag(Tok.getLocation(), diag::err_expected) << tok::identifier;
2374 return true;
2375 }
2376
2377 // The string literal must be empty.
2378 if (!Literal.GetString().empty() || Literal.Pascal) {
2379 // C++11 [over.literal]p1:
2380 // The string-literal or user-defined-string-literal in a
2381 // literal-operator-id shall [...] contain no characters
2382 // other than the implicit terminating '\0'.
2383 DiagLoc = TokLocs.front();
2384 DiagId = diag::err_literal_operator_string_not_empty;
2385 }
2386
2387 if (DiagId) {
2388 // This isn't a valid literal-operator-id, but we think we know
2389 // what the user meant. Tell them what they should have written.
2390 SmallString<32> Str;
2391 Str += "\"\"";
2392 Str += II->getName();
2393 Diag(DiagLoc, DiagId) << FixItHint::CreateReplacement(
2394 SourceRange(TokLocs.front(), TokLocs.back()), Str);
2395 }
2396
2397 Result.setLiteralOperatorId(II, KeywordLoc, SuffixLoc);
2398
2399 return Actions.checkLiteralOperatorId(SS, Result);
2400 }
2401
2402 // Parse a conversion-function-id.
2403 //
2404 // conversion-function-id: [C++ 12.3.2]
2405 // operator conversion-type-id
2406 //
2407 // conversion-type-id:
2408 // type-specifier-seq conversion-declarator[opt]
2409 //
2410 // conversion-declarator:
2411 // ptr-operator conversion-declarator[opt]
2412
2413 // Parse the type-specifier-seq.
2414 DeclSpec DS(AttrFactory);
2415 if (ParseCXXTypeSpecifierSeq(DS)) // FIXME: ObjectType?
2416 return true;
2417
2418 // Parse the conversion-declarator, which is merely a sequence of
2419 // ptr-operators.
2420 Declarator D(DS, DeclaratorContext::ConversionIdContext);
2421 ParseDeclaratorInternal(D, /*DirectDeclParser=*/nullptr);
2422
2423 // Finish up the type.
2424 TypeResult Ty = Actions.ActOnTypeName(getCurScope(), D);
2425 if (Ty.isInvalid())
2426 return true;
2427
2428 // Note that this is a conversion-function-id.
2429 Result.setConversionFunctionId(KeywordLoc, Ty.get(),
2430 D.getSourceRange().getEnd());
2431 return false;
2432}
2433
2434/// Parse a C++ unqualified-id (or a C identifier), which describes the
2435/// name of an entity.
2436///
2437/// \code
2438/// unqualified-id: [C++ expr.prim.general]
2439/// identifier
2440/// operator-function-id
2441/// conversion-function-id
2442/// [C++0x] literal-operator-id [TODO]
2443/// ~ class-name
2444/// template-id
2445///
2446/// \endcode
2447///
2448/// \param SS The nested-name-specifier that preceded this unqualified-id. If
2449/// non-empty, then we are parsing the unqualified-id of a qualified-id.
2450///
2451/// \param EnteringContext whether we are entering the scope of the
2452/// nested-name-specifier.
2453///
2454/// \param AllowDestructorName whether we allow parsing of a destructor name.
2455///
2456/// \param AllowConstructorName whether we allow parsing a constructor name.
2457///
2458/// \param AllowDeductionGuide whether we allow parsing a deduction guide name.
2459///
2460/// \param ObjectType if this unqualified-id occurs within a member access
2461/// expression, the type of the base object whose member is being accessed.
2462///
2463/// \param Result on a successful parse, contains the parsed unqualified-id.
2464///
2465/// \returns true if parsing fails, false otherwise.
2466bool Parser::ParseUnqualifiedId(CXXScopeSpec &SS, bool EnteringContext,
2467 bool AllowDestructorName,
2468 bool AllowConstructorName,
2469 bool AllowDeductionGuide,
2470 ParsedType ObjectType,
2471 SourceLocation *TemplateKWLoc,
2472 UnqualifiedId &Result) {
2473 if (TemplateKWLoc)
2474 *TemplateKWLoc = SourceLocation();
2475
2476 // Handle 'A::template B'. This is for template-ids which have not
2477 // already been annotated by ParseOptionalCXXScopeSpecifier().
2478 bool TemplateSpecified = false;
2479 if (Tok.is(tok::kw_template)) {
2480 if (TemplateKWLoc && (ObjectType || SS.isSet())) {
2481 TemplateSpecified = true;
2482 *TemplateKWLoc = ConsumeToken();
2483 } else {
2484 SourceLocation TemplateLoc = ConsumeToken();
2485 Diag(TemplateLoc, diag::err_unexpected_template_in_unqualified_id)
2486 << FixItHint::CreateRemoval(TemplateLoc);
2487 }
2488 }
2489
2490 // unqualified-id:
2491 // identifier
2492 // template-id (when it hasn't already been annotated)
2493 if (Tok.is(tok::identifier)) {
2494 // Consume the identifier.
2495 IdentifierInfo *Id = Tok.getIdentifierInfo();
2496 SourceLocation IdLoc = ConsumeToken();
2497
2498 if (!getLangOpts().CPlusPlus) {
2499 // If we're not in C++, only identifiers matter. Record the
2500 // identifier and return.
2501 Result.setIdentifier(Id, IdLoc);
2502 return false;
2503 }
2504
2505 ParsedTemplateTy TemplateName;
2506 if (AllowConstructorName &&
2507 Actions.isCurrentClassName(*Id, getCurScope(), &SS)) {
2508 // We have parsed a constructor name.
2509 ParsedType Ty = Actions.getConstructorName(*Id, IdLoc, getCurScope(), SS,
2510 EnteringContext);
2511 if (!Ty)
2512 return true;
2513 Result.setConstructorName(Ty, IdLoc, IdLoc);
2514 } else if (getLangOpts().CPlusPlus17 &&
2515 AllowDeductionGuide && SS.isEmpty() &&
2516 Actions.isDeductionGuideName(getCurScope(), *Id, IdLoc,
2517 &TemplateName)) {
2518 // We have parsed a template-name naming a deduction guide.
2519 Result.setDeductionGuideName(TemplateName, IdLoc);
2520 } else {
2521 // We have parsed an identifier.
2522 Result.setIdentifier(Id, IdLoc);
2523 }
2524
2525 // If the next token is a '<', we may have a template.
2526 TemplateTy Template;
2527 if (Tok.is(tok::less))
2528 return ParseUnqualifiedIdTemplateId(
2529 SS, TemplateKWLoc ? *TemplateKWLoc : SourceLocation(), Id, IdLoc,
2530 EnteringContext, ObjectType, Result, TemplateSpecified);
2531 else if (TemplateSpecified &&
2532 Actions.ActOnDependentTemplateName(
2533 getCurScope(), SS, *TemplateKWLoc, Result, ObjectType,
2534 EnteringContext, Template,
2535 /*AllowInjectedClassName*/ true) == TNK_Non_template)
2536 return true;
2537
2538 return false;
2539 }
2540
2541 // unqualified-id:
2542 // template-id (already parsed and annotated)
2543 if (Tok.is(tok::annot_template_id)) {
2544 TemplateIdAnnotation *TemplateId = takeTemplateIdAnnotation(Tok);
2545
2546 // If the template-name names the current class, then this is a constructor
2547 if (AllowConstructorName && TemplateId->Name &&
2548 Actions.isCurrentClassName(*TemplateId->Name, getCurScope(), &SS)) {
2549 if (SS.isSet()) {
2550 // C++ [class.qual]p2 specifies that a qualified template-name
2551 // is taken as the constructor name where a constructor can be
2552 // declared. Thus, the template arguments are extraneous, so
2553 // complain about them and remove them entirely.
2554 Diag(TemplateId->TemplateNameLoc,
2555 diag::err_out_of_line_constructor_template_id)
2556 << TemplateId->Name
2557 << FixItHint::CreateRemoval(
2558 SourceRange(TemplateId->LAngleLoc, TemplateId->RAngleLoc));
2559 ParsedType Ty = Actions.getConstructorName(
2560 *TemplateId->Name, TemplateId->TemplateNameLoc, getCurScope(), SS,
2561 EnteringContext);
2562 if (!Ty)
2563 return true;
2564 Result.setConstructorName(Ty, TemplateId->TemplateNameLoc,
2565 TemplateId->RAngleLoc);
2566 ConsumeAnnotationToken();
2567 return false;
2568 }
2569
2570 Result.setConstructorTemplateId(TemplateId);
2571 ConsumeAnnotationToken();
2572 return false;
2573 }
2574
2575 // We have already parsed a template-id; consume the annotation token as
2576 // our unqualified-id.
2577 Result.setTemplateId(TemplateId);
2578 SourceLocation TemplateLoc = TemplateId->TemplateKWLoc;
2579 if (TemplateLoc.isValid()) {
2580 if (TemplateKWLoc && (ObjectType || SS.isSet()))
2581 *TemplateKWLoc = TemplateLoc;
2582 else
2583 Diag(TemplateLoc, diag::err_unexpected_template_in_unqualified_id)
2584 << FixItHint::CreateRemoval(TemplateLoc);
2585 }
2586 ConsumeAnnotationToken();
2587 return false;
2588 }
2589
2590 // unqualified-id:
2591 // operator-function-id
2592 // conversion-function-id
2593 if (Tok.is(tok::kw_operator)) {
2594 if (ParseUnqualifiedIdOperator(SS, EnteringContext, ObjectType, Result))
2595 return true;
2596
2597 // If we have an operator-function-id or a literal-operator-id and the next
2598 // token is a '<', we may have a
2599 //
2600 // template-id:
2601 // operator-function-id < template-argument-list[opt] >
2602 TemplateTy Template;
2603 if ((Result.getKind() == UnqualifiedIdKind::IK_OperatorFunctionId ||
2604 Result.getKind() == UnqualifiedIdKind::IK_LiteralOperatorId) &&
2605 Tok.is(tok::less))
2606 return ParseUnqualifiedIdTemplateId(
2607 SS, TemplateKWLoc ? *TemplateKWLoc : SourceLocation(), nullptr,
2608 SourceLocation(), EnteringContext, ObjectType, Result,
2609 TemplateSpecified);
2610 else if (TemplateSpecified &&
2611 Actions.ActOnDependentTemplateName(
2612 getCurScope(), SS, *TemplateKWLoc, Result, ObjectType,
2613 EnteringContext, Template,
2614 /*AllowInjectedClassName*/ true) == TNK_Non_template)
2615 return true;
2616
2617 return false;
2618 }
2619
2620 if (getLangOpts().CPlusPlus &&
2621 (AllowDestructorName || SS.isSet()) && Tok.is(tok::tilde)) {
2622 // C++ [expr.unary.op]p10:
2623 // There is an ambiguity in the unary-expression ~X(), where X is a
2624 // class-name. The ambiguity is resolved in favor of treating ~ as a
2625 // unary complement rather than treating ~X as referring to a destructor.
2626
2627 // Parse the '~'.
2628 SourceLocation TildeLoc = ConsumeToken();
2629
2630 if (SS.isEmpty() && Tok.is(tok::kw_decltype)) {
2631 DeclSpec DS(AttrFactory);
2632 SourceLocation EndLoc = ParseDecltypeSpecifier(DS);
2633 if (ParsedType Type =
2634 Actions.getDestructorTypeForDecltype(DS, ObjectType)) {
2635 Result.setDestructorName(TildeLoc, Type, EndLoc);
2636 return false;
2637 }
2638 return true;
2639 }
2640
2641 // Parse the class-name.
2642 if (Tok.isNot(tok::identifier)) {
2643 Diag(Tok, diag::err_destructor_tilde_identifier);
2644 return true;
2645 }
2646
2647 // If the user wrote ~T::T, correct it to T::~T.
2648 DeclaratorScopeObj DeclScopeObj(*this, SS);
2649 if (!TemplateSpecified && NextToken().is(tok::coloncolon)) {
2650 // Don't let ParseOptionalCXXScopeSpecifier() "correct"
2651 // `int A; struct { ~A::A(); };` to `int A; struct { ~A:A(); };`,
2652 // it will confuse this recovery logic.
2653 ColonProtectionRAIIObject ColonRAII(*this, false);
2654
2655 if (SS.isSet()) {
2656 AnnotateScopeToken(SS, /*NewAnnotation*/true);
2657 SS.clear();
2658 }
2659 if (ParseOptionalCXXScopeSpecifier(SS, ObjectType, EnteringContext))
2660 return true;
2661 if (SS.isNotEmpty())
2662 ObjectType = nullptr;
2663 if (Tok.isNot(tok::identifier) || NextToken().is(tok::coloncolon) ||
2664 !SS.isSet()) {
2665 Diag(TildeLoc, diag::err_destructor_tilde_scope);
2666 return true;
2667 }
2668
2669 // Recover as if the tilde had been written before the identifier.
2670 Diag(TildeLoc, diag::err_destructor_tilde_scope)
2671 << FixItHint::CreateRemoval(TildeLoc)
2672 << FixItHint::CreateInsertion(Tok.getLocation(), "~");
2673
2674 // Temporarily enter the scope for the rest of this function.
2675 if (Actions.ShouldEnterDeclaratorScope(getCurScope(), SS))
2676 DeclScopeObj.EnterDeclaratorScope();
2677 }
2678
2679 // Parse the class-name (or template-name in a simple-template-id).
2680 IdentifierInfo *ClassName = Tok.getIdentifierInfo();
2681 SourceLocation ClassNameLoc = ConsumeToken();
2682
2683 if (Tok.is(tok::less)) {
2684 Result.setDestructorName(TildeLoc, nullptr, ClassNameLoc);
2685 return ParseUnqualifiedIdTemplateId(
2686 SS, TemplateKWLoc ? *TemplateKWLoc : SourceLocation(), ClassName,
2687 ClassNameLoc, EnteringContext, ObjectType, Result, TemplateSpecified);
2688 }
2689
2690 // Note that this is a destructor name.
2691 ParsedType Ty = Actions.getDestructorName(TildeLoc, *ClassName,
2692 ClassNameLoc, getCurScope(),
2693 SS, ObjectType,
2694 EnteringContext);
2695 if (!Ty)
2696 return true;
2697
2698 Result.setDestructorName(TildeLoc, Ty, ClassNameLoc);
2699 return false;
2700 }
2701
2702 Diag(Tok, diag::err_expected_unqualified_id)
2703 << getLangOpts().CPlusPlus;
2704 return true;
2705}
2706
2707/// ParseCXXNewExpression - Parse a C++ new-expression. New is used to allocate
2708/// memory in a typesafe manner and call constructors.
2709///
2710/// This method is called to parse the new expression after the optional :: has
2711/// been already parsed. If the :: was present, "UseGlobal" is true and "Start"
2712/// is its location. Otherwise, "Start" is the location of the 'new' token.
2713///
2714/// new-expression:
2715/// '::'[opt] 'new' new-placement[opt] new-type-id
2716/// new-initializer[opt]
2717/// '::'[opt] 'new' new-placement[opt] '(' type-id ')'
2718/// new-initializer[opt]
2719///
2720/// new-placement:
2721/// '(' expression-list ')'
2722///
2723/// new-type-id:
2724/// type-specifier-seq new-declarator[opt]
2725/// [GNU] attributes type-specifier-seq new-declarator[opt]
2726///
2727/// new-declarator:
2728/// ptr-operator new-declarator[opt]
2729/// direct-new-declarator
2730///
2731/// new-initializer:
2732/// '(' expression-list[opt] ')'
2733/// [C++0x] braced-init-list
2734///
2735ExprResult
2736Parser::ParseCXXNewExpression(bool UseGlobal, SourceLocation Start) {
2737 assert(Tok.is(tok::kw_new) && "expected 'new' token")(static_cast <bool> (Tok.is(tok::kw_new) && "expected 'new' token"
) ? void (0) : __assert_fail ("Tok.is(tok::kw_new) && \"expected 'new' token\""
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/Parse/ParseExprCXX.cpp"
, 2737, __extension__ __PRETTY_FUNCTION__))
;
2738 ConsumeToken(); // Consume 'new'
2739
2740 // A '(' now can be a new-placement or the '(' wrapping the type-id in the
2741 // second form of new-expression. It can't be a new-type-id.
2742
2743 ExprVector PlacementArgs;
2744 SourceLocation PlacementLParen, PlacementRParen;
2745
2746 SourceRange TypeIdParens;
2747 DeclSpec DS(AttrFactory);
2748 Declarator DeclaratorInfo(DS, DeclaratorContext::CXXNewContext);
2749 if (Tok.is(tok::l_paren)) {
2750 // If it turns out to be a placement, we change the type location.
2751 BalancedDelimiterTracker T(*this, tok::l_paren);
2752 T.consumeOpen();
2753 PlacementLParen = T.getOpenLocation();
2754 if (ParseExpressionListOrTypeId(PlacementArgs, DeclaratorInfo)) {
2755 SkipUntil(tok::semi, StopAtSemi | StopBeforeMatch);
2756 return ExprError();
2757 }
2758
2759 T.consumeClose();
2760 PlacementRParen = T.getCloseLocation();
2761 if (PlacementRParen.isInvalid()) {
2762 SkipUntil(tok::semi, StopAtSemi | StopBeforeMatch);
2763 return ExprError();
2764 }
2765
2766 if (PlacementArgs.empty()) {
2767 // Reset the placement locations. There was no placement.
2768 TypeIdParens = T.getRange();
2769 PlacementLParen = PlacementRParen = SourceLocation();
2770 } else {
2771 // We still need the type.
2772 if (Tok.is(tok::l_paren)) {
2773 BalancedDelimiterTracker T(*this, tok::l_paren);
2774 T.consumeOpen();
2775 MaybeParseGNUAttributes(DeclaratorInfo);
2776 ParseSpecifierQualifierList(DS);
2777 DeclaratorInfo.SetSourceRange(DS.getSourceRange());
2778 ParseDeclarator(DeclaratorInfo);
2779 T.consumeClose();
2780 TypeIdParens = T.getRange();
2781 } else {
2782 MaybeParseGNUAttributes(DeclaratorInfo);
2783 if (ParseCXXTypeSpecifierSeq(DS))
2784 DeclaratorInfo.setInvalidType(true);
2785 else {
2786 DeclaratorInfo.SetSourceRange(DS.getSourceRange());
2787 ParseDeclaratorInternal(DeclaratorInfo,
2788 &Parser::ParseDirectNewDeclarator);
2789 }
2790 }
2791 }
2792 } else {
2793 // A new-type-id is a simplified type-id, where essentially the
2794 // direct-declarator is replaced by a direct-new-declarator.
2795 MaybeParseGNUAttributes(DeclaratorInfo);
2796 if (ParseCXXTypeSpecifierSeq(DS))
2797 DeclaratorInfo.setInvalidType(true);
2798 else {
2799 DeclaratorInfo.SetSourceRange(DS.getSourceRange());
2800 ParseDeclaratorInternal(DeclaratorInfo,
2801 &Parser::ParseDirectNewDeclarator);
2802 }
2803 }
2804 if (DeclaratorInfo.isInvalidType()) {
2805 SkipUntil(tok::semi, StopAtSemi | StopBeforeMatch);
2806 return ExprError();
2807 }
2808
2809 ExprResult Initializer;
2810
2811 if (Tok.is(tok::l_paren)) {
2812 SourceLocation ConstructorLParen, ConstructorRParen;
2813 ExprVector ConstructorArgs;
2814 BalancedDelimiterTracker T(*this, tok::l_paren);
2815 T.consumeOpen();
2816 ConstructorLParen = T.getOpenLocation();
2817 if (Tok.isNot(tok::r_paren)) {
2818 CommaLocsTy CommaLocs;
2819 if (ParseExpressionList(ConstructorArgs, CommaLocs, [&] {
2820 ParsedType TypeRep = Actions.ActOnTypeName(getCurScope(),
2821 DeclaratorInfo).get();
2822 Actions.CodeCompleteConstructor(getCurScope(),
2823 TypeRep.get()->getCanonicalTypeInternal(),
2824 DeclaratorInfo.getLocEnd(),
2825 ConstructorArgs);
2826 })) {
2827 SkipUntil(tok::semi, StopAtSemi | StopBeforeMatch);
2828 return ExprError();
2829 }
2830 }
2831 T.consumeClose();
2832 ConstructorRParen = T.getCloseLocation();
2833 if (ConstructorRParen.isInvalid()) {
2834 SkipUntil(tok::semi, StopAtSemi | StopBeforeMatch);
2835 return ExprError();
2836 }
2837 Initializer = Actions.ActOnParenListExpr(ConstructorLParen,
2838 ConstructorRParen,
2839 ConstructorArgs);
2840 } else if (Tok.is(tok::l_brace) && getLangOpts().CPlusPlus11) {
2841 Diag(Tok.getLocation(),
2842 diag::warn_cxx98_compat_generalized_initializer_lists);
2843 Initializer = ParseBraceInitializer();
2844 }
2845 if (Initializer.isInvalid())
2846 return Initializer;
2847
2848 return Actions.ActOnCXXNew(Start, UseGlobal, PlacementLParen,
2849 PlacementArgs, PlacementRParen,
2850 TypeIdParens, DeclaratorInfo, Initializer.get());
2851}
2852
2853/// ParseDirectNewDeclarator - Parses a direct-new-declarator. Intended to be
2854/// passed to ParseDeclaratorInternal.
2855///
2856/// direct-new-declarator:
2857/// '[' expression ']'
2858/// direct-new-declarator '[' constant-expression ']'
2859///
2860void Parser::ParseDirectNewDeclarator(Declarator &D) {
2861 // Parse the array dimensions.
2862 bool first = true;
2863 while (Tok.is(tok::l_square)) {
2864 // An array-size expression can't start with a lambda.
2865 if (CheckProhibitedCXX11Attribute())
2866 continue;
2867
2868 BalancedDelimiterTracker T(*this, tok::l_square);
2869 T.consumeOpen();
2870
2871 ExprResult Size(first ? ParseExpression()
2872 : ParseConstantExpression());
2873 if (Size.isInvalid()) {
2874 // Recover
2875 SkipUntil(tok::r_square, StopAtSemi);
2876 return;
2877 }
2878 first = false;
2879
2880 T.consumeClose();
2881
2882 // Attributes here appertain to the array type. C++11 [expr.new]p5.
2883 ParsedAttributes Attrs(AttrFactory);
2884 MaybeParseCXX11Attributes(Attrs);
2885
2886 D.AddTypeInfo(DeclaratorChunk::getArray(0,
2887 /*static=*/false, /*star=*/false,
2888 Size.get(), T.getOpenLocation(),
2889 T.getCloseLocation()),
2890 std::move(Attrs), T.getCloseLocation());
2891
2892 if (T.getCloseLocation().isInvalid())
2893 return;
2894 }
2895}
2896
2897/// ParseExpressionListOrTypeId - Parse either an expression-list or a type-id.
2898/// This ambiguity appears in the syntax of the C++ new operator.
2899///
2900/// new-expression:
2901/// '::'[opt] 'new' new-placement[opt] '(' type-id ')'
2902/// new-initializer[opt]
2903///
2904/// new-placement:
2905/// '(' expression-list ')'
2906///
2907bool Parser::ParseExpressionListOrTypeId(
2908 SmallVectorImpl<Expr*> &PlacementArgs,
2909 Declarator &D) {
2910 // The '(' was already consumed.
2911 if (isTypeIdInParens()) {
2912 ParseSpecifierQualifierList(D.getMutableDeclSpec());
2913 D.SetSourceRange(D.getDeclSpec().getSourceRange());
2914 ParseDeclarator(D);
2915 return D.isInvalidType();
2916 }
2917
2918 // It's not a type, it has to be an expression list.
2919 // Discard the comma locations - ActOnCXXNew has enough parameters.
2920 CommaLocsTy CommaLocs;
2921 return ParseExpressionList(PlacementArgs, CommaLocs);
2922}
2923
2924/// ParseCXXDeleteExpression - Parse a C++ delete-expression. Delete is used
2925/// to free memory allocated by new.
2926///
2927/// This method is called to parse the 'delete' expression after the optional
2928/// '::' has been already parsed. If the '::' was present, "UseGlobal" is true
2929/// and "Start" is its location. Otherwise, "Start" is the location of the
2930/// 'delete' token.
2931///
2932/// delete-expression:
2933/// '::'[opt] 'delete' cast-expression
2934/// '::'[opt] 'delete' '[' ']' cast-expression
2935ExprResult
2936Parser::ParseCXXDeleteExpression(bool UseGlobal, SourceLocation Start) {
2937 assert(Tok.is(tok::kw_delete) && "Expected 'delete' keyword")(static_cast <bool> (Tok.is(tok::kw_delete) && "Expected 'delete' keyword"
) ? void (0) : __assert_fail ("Tok.is(tok::kw_delete) && \"Expected 'delete' keyword\""
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/Parse/ParseExprCXX.cpp"
, 2937, __extension__ __PRETTY_FUNCTION__))
;
2938 ConsumeToken(); // Consume 'delete'
2939
2940 // Array delete?
2941 bool ArrayDelete = false;
2942 if (Tok.is(tok::l_square) && NextToken().is(tok::r_square)) {
2943 // C++11 [expr.delete]p1:
2944 // Whenever the delete keyword is followed by empty square brackets, it
2945 // shall be interpreted as [array delete].
2946 // [Footnote: A lambda expression with a lambda-introducer that consists
2947 // of empty square brackets can follow the delete keyword if
2948 // the lambda expression is enclosed in parentheses.]
2949 // FIXME: Produce a better diagnostic if the '[]' is unambiguously a
2950 // lambda-introducer.
2951 ArrayDelete = true;
2952 BalancedDelimiterTracker T(*this, tok::l_square);
2953
2954 T.consumeOpen();
2955 T.consumeClose();
2956 if (T.getCloseLocation().isInvalid())
2957 return ExprError();
2958 }
2959
2960 ExprResult Operand(ParseCastExpression(false));
2961 if (Operand.isInvalid())
2962 return Operand;
2963
2964 return Actions.ActOnCXXDelete(Start, UseGlobal, ArrayDelete, Operand.get());
2965}
2966
2967static TypeTrait TypeTraitFromTokKind(tok::TokenKind kind) {
2968 switch (kind) {
2969 default: llvm_unreachable("Not a known type trait")::llvm::llvm_unreachable_internal("Not a known type trait", "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/Parse/ParseExprCXX.cpp"
, 2969)
;
2970#define TYPE_TRAIT_1(Spelling, Name, Key) \
2971case tok::kw_ ## Spelling: return UTT_ ## Name;
2972#define TYPE_TRAIT_2(Spelling, Name, Key) \
2973case tok::kw_ ## Spelling: return BTT_ ## Name;
2974#include "clang/Basic/TokenKinds.def"
2975#define TYPE_TRAIT_N(Spelling, Name, Key) \
2976 case tok::kw_ ## Spelling: return TT_ ## Name;
2977#include "clang/Basic/TokenKinds.def"
2978 }
2979}
2980
2981static ArrayTypeTrait ArrayTypeTraitFromTokKind(tok::TokenKind kind) {
2982 switch(kind) {
2983 default: llvm_unreachable("Not a known binary type trait")::llvm::llvm_unreachable_internal("Not a known binary type trait"
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/Parse/ParseExprCXX.cpp"
, 2983)
;
2984 case tok::kw___array_rank: return ATT_ArrayRank;
2985 case tok::kw___array_extent: return ATT_ArrayExtent;
2986 }
2987}
2988
2989static ExpressionTrait ExpressionTraitFromTokKind(tok::TokenKind kind) {
2990 switch(kind) {
2991 default: llvm_unreachable("Not a known unary expression trait.")::llvm::llvm_unreachable_internal("Not a known unary expression trait."
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/Parse/ParseExprCXX.cpp"
, 2991)
;
2992 case tok::kw___is_lvalue_expr: return ET_IsLValueExpr;
2993 case tok::kw___is_rvalue_expr: return ET_IsRValueExpr;
2994 }
2995}
2996
2997static unsigned TypeTraitArity(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-7~svn338205/tools/clang/lib/Parse/ParseExprCXX.cpp"
, 2999)
;
3000#define TYPE_TRAIT(N,Spelling,K) case tok::kw_##Spelling: return N;
3001#include "clang/Basic/TokenKinds.def"
3002 }
3003}
3004
3005/// Parse the built-in type-trait pseudo-functions that allow
3006/// implementation of the TR1/C++11 type traits templates.
3007///
3008/// primary-expression:
3009/// unary-type-trait '(' type-id ')'
3010/// binary-type-trait '(' type-id ',' type-id ')'
3011/// type-trait '(' type-id-seq ')'
3012///
3013/// type-id-seq:
3014/// type-id ...[opt] type-id-seq[opt]
3015///
3016ExprResult Parser::ParseTypeTrait() {
3017 tok::TokenKind Kind = Tok.getKind();
3018 unsigned Arity = TypeTraitArity(Kind);
3019
3020 SourceLocation Loc = ConsumeToken();
3021
3022 BalancedDelimiterTracker Parens(*this, tok::l_paren);
3023 if (Parens.expectAndConsume())
3024 return ExprError();
3025
3026 SmallVector<ParsedType, 2> Args;
3027 do {
3028 // Parse the next type.
3029 TypeResult Ty = ParseTypeName();
3030 if (Ty.isInvalid()) {
3031 Parens.skipToEnd();
3032 return ExprError();
3033 }
3034
3035 // Parse the ellipsis, if present.
3036 if (Tok.is(tok::ellipsis)) {
3037 Ty = Actions.ActOnPackExpansion(Ty.get(), ConsumeToken());
3038 if (Ty.isInvalid()) {
3039 Parens.skipToEnd();
3040 return ExprError();
3041 }
3042 }
3043
3044 // Add this type to the list of arguments.
3045 Args.push_back(Ty.get());
3046 } while (TryConsumeToken(tok::comma));
3047
3048 if (Parens.consumeClose())
3049 return ExprError();
3050
3051 SourceLocation EndLoc = Parens.getCloseLocation();
3052
3053 if (Arity && Args.size() != Arity) {
3054 Diag(EndLoc, diag::err_type_trait_arity)
3055 << Arity << 0 << (Arity > 1) << (int)Args.size() << SourceRange(Loc);
3056 return ExprError();
3057 }
3058
3059 if (!Arity && Args.empty()) {
3060 Diag(EndLoc, diag::err_type_trait_arity)
3061 << 1 << 1 << 1 << (int)Args.size() << SourceRange(Loc);
3062 return ExprError();
3063 }
3064
3065 return Actions.ActOnTypeTrait(TypeTraitFromTokKind(Kind), Loc, Args, EndLoc);
3066}
3067
3068/// ParseArrayTypeTrait - Parse the built-in array type-trait
3069/// pseudo-functions.
3070///
3071/// primary-expression:
3072/// [Embarcadero] '__array_rank' '(' type-id ')'
3073/// [Embarcadero] '__array_extent' '(' type-id ',' expression ')'
3074///
3075ExprResult Parser::ParseArrayTypeTrait() {
3076 ArrayTypeTrait ATT = ArrayTypeTraitFromTokKind(Tok.getKind());
3077 SourceLocation Loc = ConsumeToken();
3078
3079 BalancedDelimiterTracker T(*this, tok::l_paren);
3080 if (T.expectAndConsume())
3081 return ExprError();
3082
3083 TypeResult Ty = ParseTypeName();
3084 if (Ty.isInvalid()) {
3085 SkipUntil(tok::comma, StopAtSemi);
3086 SkipUntil(tok::r_paren, StopAtSemi);
3087 return ExprError();
3088 }
3089
3090 switch (ATT) {
3091 case ATT_ArrayRank: {
3092 T.consumeClose();
3093 return Actions.ActOnArrayTypeTrait(ATT, Loc, Ty.get(), nullptr,
3094 T.getCloseLocation());
3095 }
3096 case ATT_ArrayExtent: {
3097 if (ExpectAndConsume(tok::comma)) {
3098 SkipUntil(tok::r_paren, StopAtSemi);
3099 return ExprError();
3100 }
3101
3102 ExprResult DimExpr = ParseExpression();
3103 T.consumeClose();
3104
3105 return Actions.ActOnArrayTypeTrait(ATT, Loc, Ty.get(), DimExpr.get(),
3106 T.getCloseLocation());
3107 }
3108 }
3109 llvm_unreachable("Invalid ArrayTypeTrait!")::llvm::llvm_unreachable_internal("Invalid ArrayTypeTrait!", "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/Parse/ParseExprCXX.cpp"
, 3109)
;
3110}
3111
3112/// ParseExpressionTrait - Parse built-in expression-trait
3113/// pseudo-functions like __is_lvalue_expr( xxx ).
3114///
3115/// primary-expression:
3116/// [Embarcadero] expression-trait '(' expression ')'
3117///
3118ExprResult Parser::ParseExpressionTrait() {
3119 ExpressionTrait ET = ExpressionTraitFromTokKind(Tok.getKind());
3120 SourceLocation Loc = ConsumeToken();
3121
3122 BalancedDelimiterTracker T(*this, tok::l_paren);
3123 if (T.expectAndConsume())
3124 return ExprError();
3125
3126 ExprResult Expr = ParseExpression();
3127
3128 T.consumeClose();
3129
3130 return Actions.ActOnExpressionTrait(ET, Loc, Expr.get(),
3131 T.getCloseLocation());
3132}
3133
3134
3135/// ParseCXXAmbiguousParenExpression - We have parsed the left paren of a
3136/// parenthesized ambiguous type-id. This uses tentative parsing to disambiguate
3137/// based on the context past the parens.
3138ExprResult
3139Parser::ParseCXXAmbiguousParenExpression(ParenParseOption &ExprType,
3140 ParsedType &CastTy,
3141 BalancedDelimiterTracker &Tracker,
3142 ColonProtectionRAIIObject &ColonProt) {
3143 assert(getLangOpts().CPlusPlus && "Should only be called for C++!")(static_cast <bool> (getLangOpts().CPlusPlus &&
"Should only be called for C++!") ? void (0) : __assert_fail
("getLangOpts().CPlusPlus && \"Should only be called for C++!\""
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/Parse/ParseExprCXX.cpp"
, 3143, __extension__ __PRETTY_FUNCTION__))
;
3144 assert(ExprType == CastExpr && "Compound literals are not ambiguous!")(static_cast <bool> (ExprType == CastExpr && "Compound literals are not ambiguous!"
) ? void (0) : __assert_fail ("ExprType == CastExpr && \"Compound literals are not ambiguous!\""
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/Parse/ParseExprCXX.cpp"
, 3144, __extension__ __PRETTY_FUNCTION__))
;
3145 assert(isTypeIdInParens() && "Not a type-id!")(static_cast <bool> (isTypeIdInParens() && "Not a type-id!"
) ? void (0) : __assert_fail ("isTypeIdInParens() && \"Not a type-id!\""
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/Parse/ParseExprCXX.cpp"
, 3145, __extension__ __PRETTY_FUNCTION__))
;
3146
3147 ExprResult Result(true);
3148 CastTy = nullptr;
3149
3150 // We need to disambiguate a very ugly part of the C++ syntax:
3151 //
3152 // (T())x; - type-id
3153 // (T())*x; - type-id
3154 // (T())/x; - expression
3155 // (T()); - expression
3156 //
3157 // The bad news is that we cannot use the specialized tentative parser, since
3158 // it can only verify that the thing inside the parens can be parsed as
3159 // type-id, it is not useful for determining the context past the parens.
3160 //
3161 // The good news is that the parser can disambiguate this part without
3162 // making any unnecessary Action calls.
3163 //
3164 // It uses a scheme similar to parsing inline methods. The parenthesized
3165 // tokens are cached, the context that follows is determined (possibly by
3166 // parsing a cast-expression), and then we re-introduce the cached tokens
3167 // into the token stream and parse them appropriately.
3168
3169 ParenParseOption ParseAs;
3170 CachedTokens Toks;
3171
3172 // Store the tokens of the parentheses. We will parse them after we determine
3173 // the context that follows them.
3174 if (!ConsumeAndStoreUntil(tok::r_paren, Toks)) {
3175 // We didn't find the ')' we expected.
3176 Tracker.consumeClose();
3177 return ExprError();
3178 }
3179
3180 if (Tok.is(tok::l_brace)) {
3181 ParseAs = CompoundLiteral;
3182 } else {
3183 bool NotCastExpr;
3184 if (Tok.is(tok::l_paren) && NextToken().is(tok::r_paren)) {
3185 NotCastExpr = true;
3186 } else {
3187 // Try parsing the cast-expression that may follow.
3188 // If it is not a cast-expression, NotCastExpr will be true and no token
3189 // will be consumed.
3190 ColonProt.restore();
3191 Result = ParseCastExpression(false/*isUnaryExpression*/,
3192 false/*isAddressofOperand*/,
3193 NotCastExpr,
3194 // type-id has priority.
3195 IsTypeCast);
3196 }
3197
3198 // If we parsed a cast-expression, it's really a type-id, otherwise it's
3199 // an expression.
3200 ParseAs = NotCastExpr ? SimpleExpr : CastExpr;
3201 }
3202
3203 // Create a fake EOF to mark end of Toks buffer.
3204 Token AttrEnd;
3205 AttrEnd.startToken();
3206 AttrEnd.setKind(tok::eof);
3207 AttrEnd.setLocation(Tok.getLocation());
3208 AttrEnd.setEofData(Toks.data());
3209 Toks.push_back(AttrEnd);
3210
3211 // The current token should go after the cached tokens.
3212 Toks.push_back(Tok);
3213 // Re-enter the stored parenthesized tokens into the token stream, so we may
3214 // parse them now.
3215 PP.EnterTokenStream(Toks, true /*DisableMacroExpansion*/);
3216 // Drop the current token and bring the first cached one. It's the same token
3217 // as when we entered this function.
3218 ConsumeAnyToken();
3219
3220 if (ParseAs >= CompoundLiteral) {
3221 // Parse the type declarator.
3222 DeclSpec DS(AttrFactory);
3223 Declarator DeclaratorInfo(DS, DeclaratorContext::TypeNameContext);
3224 {
3225 ColonProtectionRAIIObject InnerColonProtection(*this);
3226 ParseSpecifierQualifierList(DS);
3227 ParseDeclarator(DeclaratorInfo);
3228 }
3229
3230 // Match the ')'.
3231 Tracker.consumeClose();
3232 ColonProt.restore();
3233
3234 // Consume EOF marker for Toks buffer.
3235 assert(Tok.is(tok::eof) && Tok.getEofData() == AttrEnd.getEofData())(static_cast <bool> (Tok.is(tok::eof) && Tok.getEofData
() == AttrEnd.getEofData()) ? void (0) : __assert_fail ("Tok.is(tok::eof) && Tok.getEofData() == AttrEnd.getEofData()"
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/Parse/ParseExprCXX.cpp"
, 3235, __extension__ __PRETTY_FUNCTION__))
;
3236 ConsumeAnyToken();
3237
3238 if (ParseAs == CompoundLiteral) {
3239 ExprType = CompoundLiteral;
3240 if (DeclaratorInfo.isInvalidType())
3241 return ExprError();
3242
3243 TypeResult Ty = Actions.ActOnTypeName(getCurScope(), DeclaratorInfo);
3244 return ParseCompoundLiteralExpression(Ty.get(),
3245 Tracker.getOpenLocation(),
3246 Tracker.getCloseLocation());
3247 }
3248
3249 // We parsed '(' type-id ')' and the thing after it wasn't a '{'.
3250 assert(ParseAs == CastExpr)(static_cast <bool> (ParseAs == CastExpr) ? void (0) : __assert_fail
("ParseAs == CastExpr", "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/Parse/ParseExprCXX.cpp"
, 3250, __extension__ __PRETTY_FUNCTION__))
;
3251
3252 if (DeclaratorInfo.isInvalidType())
3253 return ExprError();
3254
3255 // Result is what ParseCastExpression returned earlier.
3256 if (!Result.isInvalid())
3257 Result = Actions.ActOnCastExpr(getCurScope(), Tracker.getOpenLocation(),
3258 DeclaratorInfo, CastTy,
3259 Tracker.getCloseLocation(), Result.get());
3260 return Result;
3261 }
3262
3263 // Not a compound literal, and not followed by a cast-expression.
3264 assert(ParseAs == SimpleExpr)(static_cast <bool> (ParseAs == SimpleExpr) ? void (0) :
__assert_fail ("ParseAs == SimpleExpr", "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/Parse/ParseExprCXX.cpp"
, 3264, __extension__ __PRETTY_FUNCTION__))
;
3265
3266 ExprType = SimpleExpr;
3267 Result = ParseExpression();
3268 if (!Result.isInvalid() && Tok.is(tok::r_paren))
3269 Result = Actions.ActOnParenExpr(Tracker.getOpenLocation(),
3270 Tok.getLocation(), Result.get());
3271
3272 // Match the ')'.
3273 if (Result.isInvalid()) {
3274 while (Tok.isNot(tok::eof))
3275 ConsumeAnyToken();
3276 assert(Tok.getEofData() == AttrEnd.getEofData())(static_cast <bool> (Tok.getEofData() == AttrEnd.getEofData
()) ? void (0) : __assert_fail ("Tok.getEofData() == AttrEnd.getEofData()"
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/Parse/ParseExprCXX.cpp"
, 3276, __extension__ __PRETTY_FUNCTION__))
;
3277 ConsumeAnyToken();
3278 return ExprError();
3279 }
3280
3281 Tracker.consumeClose();
3282 // Consume EOF marker for Toks buffer.
3283 assert(Tok.is(tok::eof) && Tok.getEofData() == AttrEnd.getEofData())(static_cast <bool> (Tok.is(tok::eof) && Tok.getEofData
() == AttrEnd.getEofData()) ? void (0) : __assert_fail ("Tok.is(tok::eof) && Tok.getEofData() == AttrEnd.getEofData()"
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/Parse/ParseExprCXX.cpp"
, 3283, __extension__ __PRETTY_FUNCTION__))
;
3284 ConsumeAnyToken();
3285 return Result;
3286}