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1 : //===-- DeclBase.h - Base Classes for representing declarations -*- C++ -*-===//
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 defines the Decl and DeclContext interfaces.
11 : //
12 : //===----------------------------------------------------------------------===//
13 :
14 : #ifndef LLVM_CLANG_AST_DECLBASE_H
15 : #define LLVM_CLANG_AST_DECLBASE_H
16 :
17 : #include "clang/AST/AttrIterator.h"
18 : #include "clang/AST/DeclarationName.h"
19 : #include "clang/Basic/Specifiers.h"
20 : #include "llvm/ADT/PointerUnion.h"
21 : #include "llvm/ADT/iterator.h"
22 : #include "llvm/ADT/iterator_range.h"
23 : #include "llvm/Support/Compiler.h"
24 : #include "llvm/Support/PrettyStackTrace.h"
25 :
26 : namespace clang {
27 : class ASTMutationListener;
28 : class BlockDecl;
29 : class CXXRecordDecl;
30 : class CompoundStmt;
31 : class DeclContext;
32 : class DeclarationName;
33 : class DependentDiagnostic;
34 : class EnumDecl;
35 : class FunctionDecl;
36 : class FunctionType;
37 : enum Linkage : unsigned char;
38 : class LinkageComputer;
39 : class LinkageSpecDecl;
40 : class Module;
41 : class NamedDecl;
42 : class NamespaceDecl;
43 : class ObjCCategoryDecl;
44 : class ObjCCategoryImplDecl;
45 : class ObjCContainerDecl;
46 : class ObjCImplDecl;
47 : class ObjCImplementationDecl;
48 : class ObjCInterfaceDecl;
49 : class ObjCMethodDecl;
50 : class ObjCProtocolDecl;
51 : struct PrintingPolicy;
52 : class RecordDecl;
53 : class Stmt;
54 : class StoredDeclsMap;
55 : class TranslationUnitDecl;
56 : class UsingDirectiveDecl;
57 : }
58 :
59 : namespace clang {
60 :
61 : /// \brief Captures the result of checking the availability of a
62 : /// declaration.
63 : enum AvailabilityResult {
64 : AR_Available = 0,
65 : AR_NotYetIntroduced,
66 : AR_Deprecated,
67 : AR_Unavailable
68 : };
69 :
70 : /// Decl - This represents one declaration (or definition), e.g. a variable,
71 : /// typedef, function, struct, etc.
72 : ///
73 : class Decl {
74 : public:
75 : /// \brief Lists the kind of concrete classes of Decl.
76 : enum Kind {
77 : #define DECL(DERIVED, BASE) DERIVED,
78 : #define ABSTRACT_DECL(DECL)
79 : #define DECL_RANGE(BASE, START, END) \
80 : first##BASE = START, last##BASE = END,
81 : #define LAST_DECL_RANGE(BASE, START, END) \
82 : first##BASE = START, last##BASE = END
83 : #include "clang/AST/DeclNodes.inc"
84 : };
85 :
86 : /// \brief A placeholder type used to construct an empty shell of a
87 : /// decl-derived type that will be filled in later (e.g., by some
88 : /// deserialization method).
89 : struct EmptyShell { };
90 :
91 : /// IdentifierNamespace - The different namespaces in which
92 : /// declarations may appear. According to C99 6.2.3, there are
93 : /// four namespaces, labels, tags, members and ordinary
94 : /// identifiers. C++ describes lookup completely differently:
95 : /// certain lookups merely "ignore" certain kinds of declarations,
96 : /// usually based on whether the declaration is of a type, etc.
97 : ///
98 : /// These are meant as bitmasks, so that searches in
99 : /// C++ can look into the "tag" namespace during ordinary lookup.
100 : ///
101 : /// Decl currently provides 15 bits of IDNS bits.
102 : enum IdentifierNamespace {
103 : /// Labels, declared with 'x:' and referenced with 'goto x'.
104 : IDNS_Label = 0x0001,
105 :
106 : /// Tags, declared with 'struct foo;' and referenced with
107 : /// 'struct foo'. All tags are also types. This is what
108 : /// elaborated-type-specifiers look for in C.
109 : IDNS_Tag = 0x0002,
110 :
111 : /// Types, declared with 'struct foo', typedefs, etc.
112 : /// This is what elaborated-type-specifiers look for in C++,
113 : /// but note that it's ill-formed to find a non-tag.
114 : IDNS_Type = 0x0004,
115 :
116 : /// Members, declared with object declarations within tag
117 : /// definitions. In C, these can only be found by "qualified"
118 : /// lookup in member expressions. In C++, they're found by
119 : /// normal lookup.
120 : IDNS_Member = 0x0008,
121 :
122 : /// Namespaces, declared with 'namespace foo {}'.
123 : /// Lookup for nested-name-specifiers find these.
124 : IDNS_Namespace = 0x0010,
125 :
126 : /// Ordinary names. In C, everything that's not a label, tag,
127 : /// or member ends up here.
128 : IDNS_Ordinary = 0x0020,
129 :
130 : /// Objective C \@protocol.
131 : IDNS_ObjCProtocol = 0x0040,
132 :
133 : /// This declaration is a friend function. A friend function
134 : /// declaration is always in this namespace but may also be in
135 : /// IDNS_Ordinary if it was previously declared.
136 : IDNS_OrdinaryFriend = 0x0080,
137 :
138 : /// This declaration is a friend class. A friend class
139 : /// declaration is always in this namespace but may also be in
140 : /// IDNS_Tag|IDNS_Type if it was previously declared.
141 : IDNS_TagFriend = 0x0100,
142 :
143 : /// This declaration is a using declaration. A using declaration
144 : /// *introduces* a number of other declarations into the current
145 : /// scope, and those declarations use the IDNS of their targets,
146 : /// but the actual using declarations go in this namespace.
147 : IDNS_Using = 0x0200,
148 :
149 : /// This declaration is a C++ operator declared in a non-class
150 : /// context. All such operators are also in IDNS_Ordinary.
151 : /// C++ lexical operator lookup looks for these.
152 : IDNS_NonMemberOperator = 0x0400,
153 :
154 : /// This declaration is a function-local extern declaration of a
155 : /// variable or function. This may also be IDNS_Ordinary if it
156 : /// has been declared outside any function.
157 : IDNS_LocalExtern = 0x0800
158 : };
159 :
160 : /// ObjCDeclQualifier - 'Qualifiers' written next to the return and
161 : /// parameter types in method declarations. Other than remembering
162 : /// them and mangling them into the method's signature string, these
163 : /// are ignored by the compiler; they are consumed by certain
164 : /// remote-messaging frameworks.
165 : ///
166 : /// in, inout, and out are mutually exclusive and apply only to
167 : /// method parameters. bycopy and byref are mutually exclusive and
168 : /// apply only to method parameters (?). oneway applies only to
169 : /// results. All of these expect their corresponding parameter to
170 : /// have a particular type. None of this is currently enforced by
171 : /// clang.
172 : ///
173 : /// This should be kept in sync with ObjCDeclSpec::ObjCDeclQualifier.
174 : enum ObjCDeclQualifier {
175 : OBJC_TQ_None = 0x0,
176 : OBJC_TQ_In = 0x1,
177 : OBJC_TQ_Inout = 0x2,
178 : OBJC_TQ_Out = 0x4,
179 : OBJC_TQ_Bycopy = 0x8,
180 : OBJC_TQ_Byref = 0x10,
181 : OBJC_TQ_Oneway = 0x20,
182 :
183 : /// The nullability qualifier is set when the nullability of the
184 : /// result or parameter was expressed via a context-sensitive
185 : /// keyword.
186 : OBJC_TQ_CSNullability = 0x40
187 : };
188 :
189 : protected:
190 : // Enumeration values used in the bits stored in NextInContextAndBits.
191 : enum {
192 : /// \brief Whether this declaration is a top-level declaration (function,
193 : /// global variable, etc.) that is lexically inside an objc container
194 : /// definition.
195 : TopLevelDeclInObjCContainerFlag = 0x01,
196 :
197 : /// \brief Whether this declaration is private to the module in which it was
198 : /// defined.
199 : ModulePrivateFlag = 0x02
200 : };
201 :
202 : /// \brief The next declaration within the same lexical
203 : /// DeclContext. These pointers form the linked list that is
204 : /// traversed via DeclContext's decls_begin()/decls_end().
205 : ///
206 : /// The extra two bits are used for the TopLevelDeclInObjCContainer and
207 : /// ModulePrivate bits.
208 : llvm::PointerIntPair<Decl *, 2, unsigned> NextInContextAndBits;
209 :
210 : private:
211 : friend class DeclContext;
212 :
213 : struct MultipleDC {
214 : DeclContext *SemanticDC;
215 : DeclContext *LexicalDC;
216 : };
217 :
218 :
219 : /// DeclCtx - Holds either a DeclContext* or a MultipleDC*.
220 : /// For declarations that don't contain C++ scope specifiers, it contains
221 : /// the DeclContext where the Decl was declared.
222 : /// For declarations with C++ scope specifiers, it contains a MultipleDC*
223 : /// with the context where it semantically belongs (SemanticDC) and the
224 : /// context where it was lexically declared (LexicalDC).
225 : /// e.g.:
226 : ///
227 : /// namespace A {
228 : /// void f(); // SemanticDC == LexicalDC == 'namespace A'
229 : /// }
230 : /// void A::f(); // SemanticDC == namespace 'A'
231 : /// // LexicalDC == global namespace
232 : llvm::PointerUnion<DeclContext*, MultipleDC*> DeclCtx;
233 :
234 : inline bool isInSemaDC() const { return DeclCtx.is<DeclContext*>(); }
235 : inline bool isOutOfSemaDC() const { return DeclCtx.is<MultipleDC*>(); }
236 : inline MultipleDC *getMultipleDC() const {
237 : return DeclCtx.get<MultipleDC*>();
238 : }
239 : inline DeclContext *getSemanticDC() const {
240 : return DeclCtx.get<DeclContext*>();
241 : }
242 :
243 : /// Loc - The location of this decl.
244 : SourceLocation Loc;
245 :
246 : /// DeclKind - This indicates which class this is.
247 : unsigned DeclKind : 8;
248 :
249 : /// InvalidDecl - This indicates a semantic error occurred.
250 : unsigned InvalidDecl : 1;
251 :
252 : /// HasAttrs - This indicates whether the decl has attributes or not.
253 : unsigned HasAttrs : 1;
254 :
255 : /// Implicit - Whether this declaration was implicitly generated by
256 : /// the implementation rather than explicitly written by the user.
257 : unsigned Implicit : 1;
258 :
259 : /// \brief Whether this declaration was "used", meaning that a definition is
260 : /// required.
261 : unsigned Used : 1;
262 :
263 : /// \brief Whether this declaration was "referenced".
264 : /// The difference with 'Used' is whether the reference appears in a
265 : /// evaluated context or not, e.g. functions used in uninstantiated templates
266 : /// are regarded as "referenced" but not "used".
267 : unsigned Referenced : 1;
268 :
269 : /// \brief Whether statistic collection is enabled.
270 : static bool StatisticsEnabled;
271 :
272 : protected:
273 : /// Access - Used by C++ decls for the access specifier.
274 : // NOTE: VC++ treats enums as signed, avoid using the AccessSpecifier enum
275 : unsigned Access : 2;
276 : friend class CXXClassMemberWrapper;
277 :
278 : /// \brief Whether this declaration was loaded from an AST file.
279 : unsigned FromASTFile : 1;
280 :
281 : /// \brief Whether this declaration is hidden from normal name lookup, e.g.,
282 : /// because it is was loaded from an AST file is either module-private or
283 : /// because its submodule has not been made visible.
284 : unsigned Hidden : 1;
285 :
286 : /// IdentifierNamespace - This specifies what IDNS_* namespace this lives in.
287 : unsigned IdentifierNamespace : 12;
288 :
289 : /// \brief If 0, we have not computed the linkage of this declaration.
290 : /// Otherwise, it is the linkage + 1.
291 : mutable unsigned CacheValidAndLinkage : 3;
292 :
293 : friend class ASTDeclWriter;
294 : friend class ASTDeclReader;
295 : friend class ASTReader;
296 : friend class LinkageComputer;
297 :
298 : template<typename decl_type> friend class Redeclarable;
299 :
300 : /// \brief Allocate memory for a deserialized declaration.
301 : ///
302 : /// This routine must be used to allocate memory for any declaration that is
303 : /// deserialized from a module file.
304 : ///
305 : /// \param Size The size of the allocated object.
306 : /// \param Ctx The context in which we will allocate memory.
307 : /// \param ID The global ID of the deserialized declaration.
308 : /// \param Extra The amount of extra space to allocate after the object.
309 : void *operator new(std::size_t Size, const ASTContext &Ctx, unsigned ID,
310 : std::size_t Extra = 0);
311 :
312 : /// \brief Allocate memory for a non-deserialized declaration.
313 : void *operator new(std::size_t Size, const ASTContext &Ctx,
314 : DeclContext *Parent, std::size_t Extra = 0);
315 :
316 : private:
317 : bool AccessDeclContextSanity() const;
318 :
319 : protected:
320 :
321 : Decl(Kind DK, DeclContext *DC, SourceLocation L)
322 : : NextInContextAndBits(), DeclCtx(DC),
323 : Loc(L), DeclKind(DK), InvalidDecl(0),
324 : HasAttrs(false), Implicit(false), Used(false), Referenced(false),
325 : Access(AS_none), FromASTFile(0), Hidden(DC && cast<Decl>(DC)->Hidden),
326 : IdentifierNamespace(getIdentifierNamespaceForKind(DK)),
327 : CacheValidAndLinkage(0)
328 : {
329 : if (StatisticsEnabled) add(DK);
330 : }
331 :
332 : Decl(Kind DK, EmptyShell Empty)
333 : : NextInContextAndBits(), DeclKind(DK), InvalidDecl(0),
334 : HasAttrs(false), Implicit(false), Used(false), Referenced(false),
335 : Access(AS_none), FromASTFile(0), Hidden(0),
336 : IdentifierNamespace(getIdentifierNamespaceForKind(DK)),
337 : CacheValidAndLinkage(0)
338 : {
339 : if (StatisticsEnabled) add(DK);
340 : }
341 :
342 : virtual ~Decl();
343 :
344 : /// \brief Update a potentially out-of-date declaration.
345 : void updateOutOfDate(IdentifierInfo &II) const;
346 :
347 : Linkage getCachedLinkage() const {
348 : return Linkage(CacheValidAndLinkage - 1);
349 : }
350 :
351 : void setCachedLinkage(Linkage L) const {
352 : CacheValidAndLinkage = L + 1;
353 : }
354 :
355 : bool hasCachedLinkage() const {
356 : return CacheValidAndLinkage;
357 : }
358 :
359 : public:
360 :
361 : /// \brief Source range that this declaration covers.
362 : virtual SourceRange getSourceRange() const LLVM_READONLY {
363 : return SourceRange(getLocation(), getLocation());
364 : }
365 : SourceLocation getLocStart() const LLVM_READONLY {
366 : return getSourceRange().getBegin();
367 : }
368 : SourceLocation getLocEnd() const LLVM_READONLY {
369 : return getSourceRange().getEnd();
370 : }
371 :
372 32 : SourceLocation getLocation() const { return Loc; }
373 : void setLocation(SourceLocation L) { Loc = L; }
374 :
375 333 : Kind getKind() const { return static_cast<Kind>(DeclKind); }
376 : const char *getDeclKindName() const;
377 :
378 112 : Decl *getNextDeclInContext() { return NextInContextAndBits.getPointer(); }
379 : const Decl *getNextDeclInContext() const {return NextInContextAndBits.getPointer();}
380 :
381 : DeclContext *getDeclContext() {
382 : if (isInSemaDC())
383 : return getSemanticDC();
384 : return getMultipleDC()->SemanticDC;
385 : }
386 : const DeclContext *getDeclContext() const {
387 : return const_cast<Decl*>(this)->getDeclContext();
388 : }
389 :
390 : /// Find the innermost non-closure ancestor of this declaration,
391 : /// walking up through blocks, lambdas, etc. If that ancestor is
392 : /// not a code context (!isFunctionOrMethod()), returns null.
393 : ///
394 : /// A declaration may be its own non-closure context.
395 : Decl *getNonClosureContext();
396 : const Decl *getNonClosureContext() const {
397 : return const_cast<Decl*>(this)->getNonClosureContext();
398 : }
399 :
400 : TranslationUnitDecl *getTranslationUnitDecl();
401 : const TranslationUnitDecl *getTranslationUnitDecl() const {
402 : return const_cast<Decl*>(this)->getTranslationUnitDecl();
403 : }
404 :
405 : bool isInAnonymousNamespace() const;
406 :
407 : bool isInStdNamespace() const;
408 :
409 : ASTContext &getASTContext() const LLVM_READONLY;
410 :
411 : void setAccess(AccessSpecifier AS) {
412 : Access = AS;
413 : assert(AccessDeclContextSanity());
414 : }
415 :
416 : AccessSpecifier getAccess() const {
417 : assert(AccessDeclContextSanity());
418 : return AccessSpecifier(Access);
419 : }
420 :
421 : /// \brief Retrieve the access specifier for this declaration, even though
422 : /// it may not yet have been properly set.
423 : AccessSpecifier getAccessUnsafe() const {
424 : return AccessSpecifier(Access);
425 : }
426 :
427 138 : bool hasAttrs() const { return HasAttrs; }
428 : void setAttrs(const AttrVec& Attrs) {
429 : return setAttrsImpl(Attrs, getASTContext());
430 : }
431 : AttrVec &getAttrs() {
432 : return const_cast<AttrVec&>(const_cast<const Decl*>(this)->getAttrs());
433 : }
434 : const AttrVec &getAttrs() const;
435 : void dropAttrs();
436 :
437 : void addAttr(Attr *A) {
438 : if (hasAttrs())
439 : getAttrs().push_back(A);
440 : else
441 : setAttrs(AttrVec(1, A));
442 : }
443 :
444 : typedef AttrVec::const_iterator attr_iterator;
445 : typedef llvm::iterator_range<attr_iterator> attr_range;
446 :
447 : attr_range attrs() const {
448 69 : return attr_range(attr_begin(), attr_end());
449 : }
450 :
451 : attr_iterator attr_begin() const {
452 207 : return hasAttrs() ? getAttrs().begin() : nullptr;
453 : }
454 : attr_iterator attr_end() const {
455 207 : return hasAttrs() ? getAttrs().end() : nullptr;
456 : }
457 :
458 : template <typename T>
459 : void dropAttr() {
460 : if (!HasAttrs) return;
461 :
462 : AttrVec &Vec = getAttrs();
463 : Vec.erase(std::remove_if(Vec.begin(), Vec.end(), isa<T, Attr*>), Vec.end());
464 :
465 : if (Vec.empty())
466 : HasAttrs = false;
467 : }
468 :
469 : template <typename T>
470 : llvm::iterator_range<specific_attr_iterator<T>> specific_attrs() const {
471 : return llvm::iterator_range<specific_attr_iterator<T>>(
472 : specific_attr_begin<T>(), specific_attr_end<T>());
473 : }
474 :
475 : template <typename T>
476 : specific_attr_iterator<T> specific_attr_begin() const {
477 : return specific_attr_iterator<T>(attr_begin());
478 : }
479 : template <typename T>
480 : specific_attr_iterator<T> specific_attr_end() const {
481 : return specific_attr_iterator<T>(attr_end());
482 : }
483 :
484 : template<typename T> T *getAttr() const {
485 : return hasAttrs() ? getSpecificAttr<T>(getAttrs()) : nullptr;
486 : }
487 : template<typename T> bool hasAttr() const {
488 : return hasAttrs() && hasSpecificAttr<T>(getAttrs());
489 : }
490 :
491 : /// getMaxAlignment - return the maximum alignment specified by attributes
492 : /// on this decl, 0 if there are none.
493 : unsigned getMaxAlignment() const;
494 :
495 : /// setInvalidDecl - Indicates the Decl had a semantic error. This
496 : /// allows for graceful error recovery.
497 : void setInvalidDecl(bool Invalid = true);
498 : bool isInvalidDecl() const { return (bool) InvalidDecl; }
499 :
500 : /// isImplicit - Indicates whether the declaration was implicitly
501 : /// generated by the implementation. If false, this declaration
502 : /// was written explicitly in the source code.
503 132 : bool isImplicit() const { return Implicit; }
504 : void setImplicit(bool I = true) { Implicit = I; }
505 :
506 : /// \brief Whether this declaration was used, meaning that a definition
507 : /// is required.
508 : ///
509 : /// \param CheckUsedAttr When true, also consider the "used" attribute
510 : /// (in addition to the "used" bit set by \c setUsed()) when determining
511 : /// whether the function is used.
512 : bool isUsed(bool CheckUsedAttr = true) const;
513 :
514 : /// \brief Set whether the declaration is used, in the sense of odr-use.
515 : ///
516 : /// This should only be used immediately after creating a declaration.
517 : void setIsUsed() { Used = true; }
518 :
519 : /// \brief Mark the declaration used, in the sense of odr-use.
520 : ///
521 : /// This notifies any mutation listeners in addition to setting a bit
522 : /// indicating the declaration is used.
523 : void markUsed(ASTContext &C);
524 :
525 : /// \brief Whether any declaration of this entity was referenced.
526 : bool isReferenced() const;
527 :
528 : /// \brief Whether this declaration was referenced. This should not be relied
529 : /// upon for anything other than debugging.
530 : bool isThisDeclarationReferenced() const { return Referenced; }
531 :
532 : void setReferenced(bool R = true) { Referenced = R; }
533 :
534 : /// \brief Whether this declaration is a top-level declaration (function,
535 : /// global variable, etc.) that is lexically inside an objc container
536 : /// definition.
537 : bool isTopLevelDeclInObjCContainer() const {
538 : return NextInContextAndBits.getInt() & TopLevelDeclInObjCContainerFlag;
539 : }
540 :
541 : void setTopLevelDeclInObjCContainer(bool V = true) {
542 : unsigned Bits = NextInContextAndBits.getInt();
543 : if (V)
544 : Bits |= TopLevelDeclInObjCContainerFlag;
545 : else
546 : Bits &= ~TopLevelDeclInObjCContainerFlag;
547 : NextInContextAndBits.setInt(Bits);
548 : }
549 :
550 : /// \brief Whether this declaration was marked as being private to the
551 : /// module in which it was defined.
552 : bool isModulePrivate() const {
553 : return NextInContextAndBits.getInt() & ModulePrivateFlag;
554 : }
555 :
556 : protected:
557 : /// \brief Specify whether this declaration was marked as being private
558 : /// to the module in which it was defined.
559 : void setModulePrivate(bool MP = true) {
560 : unsigned Bits = NextInContextAndBits.getInt();
561 : if (MP)
562 : Bits |= ModulePrivateFlag;
563 : else
564 : Bits &= ~ModulePrivateFlag;
565 : NextInContextAndBits.setInt(Bits);
566 : }
567 :
568 : /// \brief Set the owning module ID.
569 : void setOwningModuleID(unsigned ID) {
570 : assert(isFromASTFile() && "Only works on a deserialized declaration");
571 : *((unsigned*)this - 2) = ID;
572 : }
573 :
574 : public:
575 :
576 : /// \brief Determine the availability of the given declaration.
577 : ///
578 : /// This routine will determine the most restrictive availability of
579 : /// the given declaration (e.g., preferring 'unavailable' to
580 : /// 'deprecated').
581 : ///
582 : /// \param Message If non-NULL and the result is not \c
583 : /// AR_Available, will be set to a (possibly empty) message
584 : /// describing why the declaration has not been introduced, is
585 : /// deprecated, or is unavailable.
586 : AvailabilityResult getAvailability(std::string *Message = nullptr) const;
587 :
588 : /// \brief Determine whether this declaration is marked 'deprecated'.
589 : ///
590 : /// \param Message If non-NULL and the declaration is deprecated,
591 : /// this will be set to the message describing why the declaration
592 : /// was deprecated (which may be empty).
593 : bool isDeprecated(std::string *Message = nullptr) const {
594 : return getAvailability(Message) == AR_Deprecated;
595 : }
596 :
597 : /// \brief Determine whether this declaration is marked 'unavailable'.
598 : ///
599 : /// \param Message If non-NULL and the declaration is unavailable,
600 : /// this will be set to the message describing why the declaration
601 : /// was made unavailable (which may be empty).
602 : bool isUnavailable(std::string *Message = nullptr) const {
603 : return getAvailability(Message) == AR_Unavailable;
604 : }
605 :
606 : /// \brief Determine whether this is a weak-imported symbol.
607 : ///
608 : /// Weak-imported symbols are typically marked with the
609 : /// 'weak_import' attribute, but may also be marked with an
610 : /// 'availability' attribute where we're targing a platform prior to
611 : /// the introduction of this feature.
612 : bool isWeakImported() const;
613 :
614 : /// \brief Determines whether this symbol can be weak-imported,
615 : /// e.g., whether it would be well-formed to add the weak_import
616 : /// attribute.
617 : ///
618 : /// \param IsDefinition Set to \c true to indicate that this
619 : /// declaration cannot be weak-imported because it has a definition.
620 : bool canBeWeakImported(bool &IsDefinition) const;
621 :
622 : /// \brief Determine whether this declaration came from an AST file (such as
623 : /// a precompiled header or module) rather than having been parsed.
624 : bool isFromASTFile() const { return FromASTFile; }
625 :
626 : /// \brief Retrieve the global declaration ID associated with this
627 : /// declaration, which specifies where in the
628 : unsigned getGlobalID() const {
629 : if (isFromASTFile())
630 : return *((const unsigned*)this - 1);
631 : return 0;
632 : }
633 :
634 : /// \brief Retrieve the global ID of the module that owns this particular
635 : /// declaration.
636 : unsigned getOwningModuleID() const {
637 : if (isFromASTFile())
638 : return *((const unsigned*)this - 2);
639 :
640 : return 0;
641 : }
642 :
643 : private:
644 : Module *getOwningModuleSlow() const;
645 : protected:
646 : bool hasLocalOwningModuleStorage() const;
647 :
648 : public:
649 : /// \brief Get the imported owning module, if this decl is from an imported
650 : /// (non-local) module.
651 : Module *getImportedOwningModule() const {
652 : if (!isFromASTFile())
653 : return nullptr;
654 :
655 : return getOwningModuleSlow();
656 : }
657 :
658 : /// \brief Get the local owning module, if known. Returns nullptr if owner is
659 : /// not yet known or declaration is not from a module.
660 : Module *getLocalOwningModule() const {
661 : if (isFromASTFile() || !Hidden)
662 : return nullptr;
663 : return reinterpret_cast<Module *const *>(this)[-1];
664 : }
665 : void setLocalOwningModule(Module *M) {
666 : assert(!isFromASTFile() && Hidden && hasLocalOwningModuleStorage() &&
667 : "should not have a cached owning module");
668 : reinterpret_cast<Module **>(this)[-1] = M;
669 : }
670 :
671 : unsigned getIdentifierNamespace() const {
672 : return IdentifierNamespace;
673 : }
674 : bool isInIdentifierNamespace(unsigned NS) const {
675 : return getIdentifierNamespace() & NS;
676 : }
677 : static unsigned getIdentifierNamespaceForKind(Kind DK);
678 :
679 : bool hasTagIdentifierNamespace() const {
680 : return isTagIdentifierNamespace(getIdentifierNamespace());
681 : }
682 : static bool isTagIdentifierNamespace(unsigned NS) {
683 : // TagDecls have Tag and Type set and may also have TagFriend.
684 : return (NS & ~IDNS_TagFriend) == (IDNS_Tag | IDNS_Type);
685 : }
686 :
687 : /// getLexicalDeclContext - The declaration context where this Decl was
688 : /// lexically declared (LexicalDC). May be different from
689 : /// getDeclContext() (SemanticDC).
690 : /// e.g.:
691 : ///
692 : /// namespace A {
693 : /// void f(); // SemanticDC == LexicalDC == 'namespace A'
694 : /// }
695 : /// void A::f(); // SemanticDC == namespace 'A'
696 : /// // LexicalDC == global namespace
697 : DeclContext *getLexicalDeclContext() {
698 : if (isInSemaDC())
699 : return getSemanticDC();
700 : return getMultipleDC()->LexicalDC;
701 : }
702 : const DeclContext *getLexicalDeclContext() const {
703 : return const_cast<Decl*>(this)->getLexicalDeclContext();
704 : }
705 :
706 : /// Determine whether this declaration is declared out of line (outside its
707 : /// semantic context).
708 : virtual bool isOutOfLine() const;
709 :
710 : /// setDeclContext - Set both the semantic and lexical DeclContext
711 : /// to DC.
712 : void setDeclContext(DeclContext *DC);
713 :
714 : void setLexicalDeclContext(DeclContext *DC);
715 :
716 : /// isDefinedOutsideFunctionOrMethod - This predicate returns true if this
717 : /// scoped decl is defined outside the current function or method. This is
718 : /// roughly global variables and functions, but also handles enums (which
719 : /// could be defined inside or outside a function etc).
720 : bool isDefinedOutsideFunctionOrMethod() const {
721 : return getParentFunctionOrMethod() == nullptr;
722 : }
723 :
724 : /// \brief If this decl is defined inside a function/method/block it returns
725 : /// the corresponding DeclContext, otherwise it returns null.
726 : const DeclContext *getParentFunctionOrMethod() const;
727 : DeclContext *getParentFunctionOrMethod() {
728 : return const_cast<DeclContext*>(
729 : const_cast<const Decl*>(this)->getParentFunctionOrMethod());
730 : }
731 :
732 : /// \brief Retrieves the "canonical" declaration of the given declaration.
733 : virtual Decl *getCanonicalDecl() { return this; }
734 : const Decl *getCanonicalDecl() const {
735 0 : return const_cast<Decl*>(this)->getCanonicalDecl();
736 : }
737 :
738 : /// \brief Whether this particular Decl is a canonical one.
739 0 : bool isCanonicalDecl() const { return getCanonicalDecl() == this; }
740 :
741 : protected:
742 : /// \brief Returns the next redeclaration or itself if this is the only decl.
743 : ///
744 : /// Decl subclasses that can be redeclared should override this method so that
745 : /// Decl::redecl_iterator can iterate over them.
746 : virtual Decl *getNextRedeclarationImpl() { return this; }
747 :
748 : /// \brief Implementation of getPreviousDecl(), to be overridden by any
749 : /// subclass that has a redeclaration chain.
750 : virtual Decl *getPreviousDeclImpl() { return nullptr; }
751 :
752 : /// \brief Implementation of getMostRecentDecl(), to be overridden by any
753 : /// subclass that has a redeclaration chain.
754 : virtual Decl *getMostRecentDeclImpl() { return this; }
755 :
756 : public:
757 : /// \brief Iterates through all the redeclarations of the same decl.
758 : class redecl_iterator {
759 : /// Current - The current declaration.
760 : Decl *Current;
761 : Decl *Starter;
762 :
763 : public:
764 : typedef Decl *value_type;
765 : typedef const value_type &reference;
766 : typedef const value_type *pointer;
767 : typedef std::forward_iterator_tag iterator_category;
768 : typedef std::ptrdiff_t difference_type;
769 :
770 : redecl_iterator() : Current(nullptr) { }
771 : explicit redecl_iterator(Decl *C) : Current(C), Starter(C) { }
772 :
773 : reference operator*() const { return Current; }
774 : value_type operator->() const { return Current; }
775 :
776 : redecl_iterator& operator++() {
777 : assert(Current && "Advancing while iterator has reached end");
778 : // Get either previous decl or latest decl.
779 : Decl *Next = Current->getNextRedeclarationImpl();
780 : assert(Next && "Should return next redeclaration or itself, never null!");
781 : Current = (Next != Starter) ? Next : nullptr;
782 : return *this;
783 : }
784 :
785 : redecl_iterator operator++(int) {
786 : redecl_iterator tmp(*this);
787 : ++(*this);
788 : return tmp;
789 : }
790 :
791 : friend bool operator==(redecl_iterator x, redecl_iterator y) {
792 : return x.Current == y.Current;
793 : }
794 : friend bool operator!=(redecl_iterator x, redecl_iterator y) {
795 : return x.Current != y.Current;
796 : }
797 : };
798 :
799 : typedef llvm::iterator_range<redecl_iterator> redecl_range;
800 :
801 : /// \brief Returns an iterator range for all the redeclarations of the same
802 : /// decl. It will iterate at least once (when this decl is the only one).
803 : redecl_range redecls() const {
804 : return redecl_range(redecls_begin(), redecls_end());
805 : }
806 :
807 : redecl_iterator redecls_begin() const {
808 : return redecl_iterator(const_cast<Decl *>(this));
809 : }
810 : redecl_iterator redecls_end() const { return redecl_iterator(); }
811 :
812 : /// \brief Retrieve the previous declaration that declares the same entity
813 : /// as this declaration, or NULL if there is no previous declaration.
814 : Decl *getPreviousDecl() { return getPreviousDeclImpl(); }
815 :
816 : /// \brief Retrieve the most recent declaration that declares the same entity
817 : /// as this declaration, or NULL if there is no previous declaration.
818 : const Decl *getPreviousDecl() const {
819 : return const_cast<Decl *>(this)->getPreviousDeclImpl();
820 : }
821 :
822 : /// \brief True if this is the first declaration in its redeclaration chain.
823 : bool isFirstDecl() const {
824 : return getPreviousDecl() == nullptr;
825 : }
826 :
827 : /// \brief Retrieve the most recent declaration that declares the same entity
828 : /// as this declaration (which may be this declaration).
829 : Decl *getMostRecentDecl() { return getMostRecentDeclImpl(); }
830 :
831 : /// \brief Retrieve the most recent declaration that declares the same entity
832 : /// as this declaration (which may be this declaration).
833 : const Decl *getMostRecentDecl() const {
834 : return const_cast<Decl *>(this)->getMostRecentDeclImpl();
835 : }
836 :
837 : /// getBody - If this Decl represents a declaration for a body of code,
838 : /// such as a function or method definition, this method returns the
839 : /// top-level Stmt* of that body. Otherwise this method returns null.
840 : virtual Stmt* getBody() const { return nullptr; }
841 :
842 : /// \brief Returns true if this \c Decl represents a declaration for a body of
843 : /// code, such as a function or method definition.
844 : /// Note that \c hasBody can also return true if any redeclaration of this
845 : /// \c Decl represents a declaration for a body of code.
846 : virtual bool hasBody() const { return getBody() != nullptr; }
847 :
848 : /// getBodyRBrace - Gets the right brace of the body, if a body exists.
849 : /// This works whether the body is a CompoundStmt or a CXXTryStmt.
850 : SourceLocation getBodyRBrace() const;
851 :
852 : // global temp stats (until we have a per-module visitor)
853 : static void add(Kind k);
854 : static void EnableStatistics();
855 : static void PrintStats();
856 :
857 : /// isTemplateParameter - Determines whether this declaration is a
858 : /// template parameter.
859 : bool isTemplateParameter() const;
860 :
861 : /// isTemplateParameter - Determines whether this declaration is a
862 : /// template parameter pack.
863 : bool isTemplateParameterPack() const;
864 :
865 : /// \brief Whether this declaration is a parameter pack.
866 : bool isParameterPack() const;
867 :
868 : /// \brief returns true if this declaration is a template
869 : bool isTemplateDecl() const;
870 :
871 : /// \brief Whether this declaration is a function or function template.
872 : bool isFunctionOrFunctionTemplate() const {
873 : return (DeclKind >= Decl::firstFunction &&
874 : DeclKind <= Decl::lastFunction) ||
875 : DeclKind == FunctionTemplate;
876 : }
877 :
878 : /// \brief Returns the function itself, or the templated function if this is a
879 : /// function template.
880 : FunctionDecl *getAsFunction() LLVM_READONLY;
881 :
882 : const FunctionDecl *getAsFunction() const {
883 : return const_cast<Decl *>(this)->getAsFunction();
884 : }
885 :
886 : /// \brief Changes the namespace of this declaration to reflect that it's
887 : /// a function-local extern declaration.
888 : ///
889 : /// These declarations appear in the lexical context of the extern
890 : /// declaration, but in the semantic context of the enclosing namespace
891 : /// scope.
892 : void setLocalExternDecl() {
893 : assert((IdentifierNamespace == IDNS_Ordinary ||
894 : IdentifierNamespace == IDNS_OrdinaryFriend) &&
895 : "namespace is not ordinary");
896 :
897 : Decl *Prev = getPreviousDecl();
898 : IdentifierNamespace &= ~IDNS_Ordinary;
899 :
900 : IdentifierNamespace |= IDNS_LocalExtern;
901 : if (Prev && Prev->getIdentifierNamespace() & IDNS_Ordinary)
902 : IdentifierNamespace |= IDNS_Ordinary;
903 : }
904 :
905 : /// \brief Determine whether this is a block-scope declaration with linkage.
906 : /// This will either be a local variable declaration declared 'extern', or a
907 : /// local function declaration.
908 : bool isLocalExternDecl() {
909 : return IdentifierNamespace & IDNS_LocalExtern;
910 : }
911 :
912 : /// \brief Changes the namespace of this declaration to reflect that it's
913 : /// the object of a friend declaration.
914 : ///
915 : /// These declarations appear in the lexical context of the friending
916 : /// class, but in the semantic context of the actual entity. This property
917 : /// applies only to a specific decl object; other redeclarations of the
918 : /// same entity may not (and probably don't) share this property.
919 : void setObjectOfFriendDecl(bool PerformFriendInjection = false) {
920 : unsigned OldNS = IdentifierNamespace;
921 : assert((OldNS & (IDNS_Tag | IDNS_Ordinary |
922 : IDNS_TagFriend | IDNS_OrdinaryFriend |
923 : IDNS_LocalExtern)) &&
924 : "namespace includes neither ordinary nor tag");
925 : assert(!(OldNS & ~(IDNS_Tag | IDNS_Ordinary | IDNS_Type |
926 : IDNS_TagFriend | IDNS_OrdinaryFriend |
927 : IDNS_LocalExtern)) &&
928 : "namespace includes other than ordinary or tag");
929 :
930 : Decl *Prev = getPreviousDecl();
931 : IdentifierNamespace &= ~(IDNS_Ordinary | IDNS_Tag | IDNS_Type);
932 :
933 : if (OldNS & (IDNS_Tag | IDNS_TagFriend)) {
934 : IdentifierNamespace |= IDNS_TagFriend;
935 : if (PerformFriendInjection ||
936 : (Prev && Prev->getIdentifierNamespace() & IDNS_Tag))
937 : IdentifierNamespace |= IDNS_Tag | IDNS_Type;
938 : }
939 :
940 : if (OldNS & (IDNS_Ordinary | IDNS_OrdinaryFriend | IDNS_LocalExtern)) {
941 : IdentifierNamespace |= IDNS_OrdinaryFriend;
942 : if (PerformFriendInjection ||
943 : (Prev && Prev->getIdentifierNamespace() & IDNS_Ordinary))
944 : IdentifierNamespace |= IDNS_Ordinary;
945 : }
946 : }
947 :
948 : enum FriendObjectKind {
949 : FOK_None, ///< Not a friend object.
950 : FOK_Declared, ///< A friend of a previously-declared entity.
951 : FOK_Undeclared ///< A friend of a previously-undeclared entity.
952 : };
953 :
954 : /// \brief Determines whether this declaration is the object of a
955 : /// friend declaration and, if so, what kind.
956 : ///
957 : /// There is currently no direct way to find the associated FriendDecl.
958 : FriendObjectKind getFriendObjectKind() const {
959 : unsigned mask =
960 : (IdentifierNamespace & (IDNS_TagFriend | IDNS_OrdinaryFriend));
961 : if (!mask) return FOK_None;
962 : return (IdentifierNamespace & (IDNS_Tag | IDNS_Ordinary) ? FOK_Declared
963 : : FOK_Undeclared);
964 : }
965 :
966 : /// Specifies that this declaration is a C++ overloaded non-member.
967 : void setNonMemberOperator() {
968 : assert(getKind() == Function || getKind() == FunctionTemplate);
969 : assert((IdentifierNamespace & IDNS_Ordinary) &&
970 : "visible non-member operators should be in ordinary namespace");
971 : IdentifierNamespace |= IDNS_NonMemberOperator;
972 : }
973 :
974 : static bool classofKind(Kind K) { return true; }
975 : static DeclContext *castToDeclContext(const Decl *);
976 : static Decl *castFromDeclContext(const DeclContext *);
977 :
978 : void print(raw_ostream &Out, unsigned Indentation = 0,
979 : bool PrintInstantiation = false) const;
980 : void print(raw_ostream &Out, const PrintingPolicy &Policy,
981 : unsigned Indentation = 0, bool PrintInstantiation = false) const;
982 : static void printGroup(Decl** Begin, unsigned NumDecls,
983 : raw_ostream &Out, const PrintingPolicy &Policy,
984 : unsigned Indentation = 0);
985 : // Debuggers don't usually respect default arguments.
986 : void dump() const;
987 : // Same as dump(), but forces color printing.
988 : void dumpColor() const;
989 : void dump(raw_ostream &Out) const;
990 :
991 : /// \brief Looks through the Decl's underlying type to extract a FunctionType
992 : /// when possible. Will return null if the type underlying the Decl does not
993 : /// have a FunctionType.
994 : const FunctionType *getFunctionType(bool BlocksToo = true) const;
995 :
996 : private:
997 : void setAttrsImpl(const AttrVec& Attrs, ASTContext &Ctx);
998 : void setDeclContextsImpl(DeclContext *SemaDC, DeclContext *LexicalDC,
999 : ASTContext &Ctx);
1000 :
1001 : protected:
1002 : ASTMutationListener *getASTMutationListener() const;
1003 : };
1004 :
1005 : /// \brief Determine whether two declarations declare the same entity.
1006 : inline bool declaresSameEntity(const Decl *D1, const Decl *D2) {
1007 : if (!D1 || !D2)
1008 : return false;
1009 :
1010 : if (D1 == D2)
1011 : return true;
1012 :
1013 : return D1->getCanonicalDecl() == D2->getCanonicalDecl();
1014 : }
1015 :
1016 : /// PrettyStackTraceDecl - If a crash occurs, indicate that it happened when
1017 : /// doing something to a specific decl.
1018 : class PrettyStackTraceDecl : public llvm::PrettyStackTraceEntry {
1019 : const Decl *TheDecl;
1020 : SourceLocation Loc;
1021 : SourceManager &SM;
1022 : const char *Message;
1023 : public:
1024 : PrettyStackTraceDecl(const Decl *theDecl, SourceLocation L,
1025 : SourceManager &sm, const char *Msg)
1026 : : TheDecl(theDecl), Loc(L), SM(sm), Message(Msg) {}
1027 :
1028 : void print(raw_ostream &OS) const override;
1029 : };
1030 :
1031 : /// \brief The results of name lookup within a DeclContext. This is either a
1032 : /// single result (with no stable storage) or a collection of results (with
1033 : /// stable storage provided by the lookup table).
1034 : class DeclContextLookupResult {
1035 : typedef ArrayRef<NamedDecl *> ResultTy;
1036 : ResultTy Result;
1037 : // If there is only one lookup result, it would be invalidated by
1038 : // reallocations of the name table, so store it separately.
1039 : NamedDecl *Single;
1040 :
1041 : static NamedDecl *const SingleElementDummyList;
1042 :
1043 : public:
1044 : DeclContextLookupResult() : Result(), Single() {}
1045 : DeclContextLookupResult(ArrayRef<NamedDecl *> Result)
1046 : : Result(Result), Single() {}
1047 : DeclContextLookupResult(NamedDecl *Single)
1048 : : Result(SingleElementDummyList), Single(Single) {}
1049 :
1050 : class iterator;
1051 : typedef llvm::iterator_adaptor_base<iterator, ResultTy::iterator,
1052 : std::random_access_iterator_tag,
1053 : NamedDecl *const> IteratorBase;
1054 : class iterator : public IteratorBase {
1055 : value_type SingleElement;
1056 :
1057 : public:
1058 : iterator() : IteratorBase(), SingleElement() {}
1059 : explicit iterator(pointer Pos, value_type Single = nullptr)
1060 : : IteratorBase(Pos), SingleElement(Single) {}
1061 :
1062 : reference operator*() const {
1063 : return SingleElement ? SingleElement : IteratorBase::operator*();
1064 : }
1065 : };
1066 : typedef iterator const_iterator;
1067 : typedef iterator::pointer pointer;
1068 : typedef iterator::reference reference;
1069 :
1070 : iterator begin() const { return iterator(Result.begin(), Single); }
1071 : iterator end() const { return iterator(Result.end(), Single); }
1072 :
1073 : bool empty() const { return Result.empty(); }
1074 : pointer data() const { return Single ? &Single : Result.data(); }
1075 : size_t size() const { return Single ? 1 : Result.size(); }
1076 : reference front() const { return Single ? Single : Result.front(); }
1077 : reference back() const { return Single ? Single : Result.back(); }
1078 : reference operator[](size_t N) const { return Single ? Single : Result[N]; }
1079 :
1080 : // FIXME: Remove this from the interface
1081 : DeclContextLookupResult slice(size_t N) const {
1082 : DeclContextLookupResult Sliced = Result.slice(N);
1083 : Sliced.Single = Single;
1084 : return Sliced;
1085 : }
1086 : };
1087 :
1088 : /// DeclContext - This is used only as base class of specific decl types that
1089 : /// can act as declaration contexts. These decls are (only the top classes
1090 : /// that directly derive from DeclContext are mentioned, not their subclasses):
1091 : ///
1092 : /// TranslationUnitDecl
1093 : /// NamespaceDecl
1094 : /// FunctionDecl
1095 : /// TagDecl
1096 : /// ObjCMethodDecl
1097 : /// ObjCContainerDecl
1098 : /// LinkageSpecDecl
1099 : /// BlockDecl
1100 : ///
1101 : class DeclContext {
1102 : /// DeclKind - This indicates which class this is.
1103 : unsigned DeclKind : 8;
1104 :
1105 : /// \brief Whether this declaration context also has some external
1106 : /// storage that contains additional declarations that are lexically
1107 : /// part of this context.
1108 : mutable bool ExternalLexicalStorage : 1;
1109 :
1110 : /// \brief Whether this declaration context also has some external
1111 : /// storage that contains additional declarations that are visible
1112 : /// in this context.
1113 : mutable bool ExternalVisibleStorage : 1;
1114 :
1115 : /// \brief Whether this declaration context has had external visible
1116 : /// storage added since the last lookup. In this case, \c LookupPtr's
1117 : /// invariant may not hold and needs to be fixed before we perform
1118 : /// another lookup.
1119 : mutable bool NeedToReconcileExternalVisibleStorage : 1;
1120 :
1121 : /// \brief If \c true, this context may have local lexical declarations
1122 : /// that are missing from the lookup table.
1123 : mutable bool HasLazyLocalLexicalLookups : 1;
1124 :
1125 : /// \brief If \c true, the external source may have lexical declarations
1126 : /// that are missing from the lookup table.
1127 : mutable bool HasLazyExternalLexicalLookups : 1;
1128 :
1129 : /// \brief Pointer to the data structure used to lookup declarations
1130 : /// within this context (or a DependentStoredDeclsMap if this is a
1131 : /// dependent context). We maintain the invariant that, if the map
1132 : /// contains an entry for a DeclarationName (and we haven't lazily
1133 : /// omitted anything), then it contains all relevant entries for that
1134 : /// name (modulo the hasExternalDecls() flag).
1135 : mutable StoredDeclsMap *LookupPtr;
1136 :
1137 : protected:
1138 : /// FirstDecl - The first declaration stored within this declaration
1139 : /// context.
1140 : mutable Decl *FirstDecl;
1141 :
1142 : /// LastDecl - The last declaration stored within this declaration
1143 : /// context. FIXME: We could probably cache this value somewhere
1144 : /// outside of the DeclContext, to reduce the size of DeclContext by
1145 : /// another pointer.
1146 : mutable Decl *LastDecl;
1147 :
1148 : friend class ExternalASTSource;
1149 : friend class ASTDeclReader;
1150 : friend class ASTWriter;
1151 :
1152 : /// \brief Build up a chain of declarations.
1153 : ///
1154 : /// \returns the first/last pair of declarations.
1155 : static std::pair<Decl *, Decl *>
1156 : BuildDeclChain(ArrayRef<Decl*> Decls, bool FieldsAlreadyLoaded);
1157 :
1158 : DeclContext(Decl::Kind K)
1159 : : DeclKind(K), ExternalLexicalStorage(false),
1160 : ExternalVisibleStorage(false),
1161 : NeedToReconcileExternalVisibleStorage(false),
1162 : HasLazyLocalLexicalLookups(false), HasLazyExternalLexicalLookups(false),
1163 : LookupPtr(nullptr), FirstDecl(nullptr), LastDecl(nullptr) {}
1164 :
1165 : public:
1166 : ~DeclContext();
1167 :
1168 : Decl::Kind getDeclKind() const {
1169 : return static_cast<Decl::Kind>(DeclKind);
1170 : }
1171 : const char *getDeclKindName() const;
1172 :
1173 : /// getParent - Returns the containing DeclContext.
1174 : DeclContext *getParent() {
1175 : return cast<Decl>(this)->getDeclContext();
1176 : }
1177 : const DeclContext *getParent() const {
1178 : return const_cast<DeclContext*>(this)->getParent();
1179 : }
1180 :
1181 : /// getLexicalParent - Returns the containing lexical DeclContext. May be
1182 : /// different from getParent, e.g.:
1183 : ///
1184 : /// namespace A {
1185 : /// struct S;
1186 : /// }
1187 : /// struct A::S {}; // getParent() == namespace 'A'
1188 : /// // getLexicalParent() == translation unit
1189 : ///
1190 : DeclContext *getLexicalParent() {
1191 : return cast<Decl>(this)->getLexicalDeclContext();
1192 : }
1193 : const DeclContext *getLexicalParent() const {
1194 : return const_cast<DeclContext*>(this)->getLexicalParent();
1195 : }
1196 :
1197 : DeclContext *getLookupParent();
1198 :
1199 : const DeclContext *getLookupParent() const {
1200 : return const_cast<DeclContext*>(this)->getLookupParent();
1201 : }
1202 :
1203 : ASTContext &getParentASTContext() const {
1204 : return cast<Decl>(this)->getASTContext();
1205 : }
1206 :
1207 : bool isClosure() const {
1208 : return DeclKind == Decl::Block;
1209 : }
1210 :
1211 : bool isObjCContainer() const {
1212 : switch (DeclKind) {
1213 : case Decl::ObjCCategory:
1214 : case Decl::ObjCCategoryImpl:
1215 : case Decl::ObjCImplementation:
1216 : case Decl::ObjCInterface:
1217 : case Decl::ObjCProtocol:
1218 : return true;
1219 : }
1220 : return false;
1221 : }
1222 :
1223 : bool isFunctionOrMethod() const {
1224 : switch (DeclKind) {
1225 : case Decl::Block:
1226 : case Decl::Captured:
1227 : case Decl::ObjCMethod:
1228 : return true;
1229 : default:
1230 : return DeclKind >= Decl::firstFunction && DeclKind <= Decl::lastFunction;
1231 : }
1232 : }
1233 :
1234 : /// \brief Test whether the context supports looking up names.
1235 : bool isLookupContext() const {
1236 : return !isFunctionOrMethod() && DeclKind != Decl::LinkageSpec;
1237 : }
1238 :
1239 : bool isFileContext() const {
1240 : return DeclKind == Decl::TranslationUnit || DeclKind == Decl::Namespace;
1241 : }
1242 :
1243 : bool isTranslationUnit() const {
1244 : return DeclKind == Decl::TranslationUnit;
1245 : }
1246 :
1247 : bool isRecord() const {
1248 : return DeclKind >= Decl::firstRecord && DeclKind <= Decl::lastRecord;
1249 : }
1250 :
1251 : bool isNamespace() const {
1252 : return DeclKind == Decl::Namespace;
1253 : }
1254 :
1255 : bool isStdNamespace() const;
1256 :
1257 : bool isInlineNamespace() const;
1258 :
1259 : /// \brief Determines whether this context is dependent on a
1260 : /// template parameter.
1261 : bool isDependentContext() const;
1262 :
1263 : /// isTransparentContext - Determines whether this context is a
1264 : /// "transparent" context, meaning that the members declared in this
1265 : /// context are semantically declared in the nearest enclosing
1266 : /// non-transparent (opaque) context but are lexically declared in
1267 : /// this context. For example, consider the enumerators of an
1268 : /// enumeration type:
1269 : /// @code
1270 : /// enum E {
1271 : /// Val1
1272 : /// };
1273 : /// @endcode
1274 : /// Here, E is a transparent context, so its enumerator (Val1) will
1275 : /// appear (semantically) that it is in the same context of E.
1276 : /// Examples of transparent contexts include: enumerations (except for
1277 : /// C++0x scoped enums), and C++ linkage specifications.
1278 : bool isTransparentContext() const;
1279 :
1280 : /// \brief Determines whether this context or some of its ancestors is a
1281 : /// linkage specification context that specifies C linkage.
1282 : bool isExternCContext() const;
1283 :
1284 : /// \brief Determines whether this context or some of its ancestors is a
1285 : /// linkage specification context that specifies C++ linkage.
1286 : bool isExternCXXContext() const;
1287 :
1288 : /// \brief Determine whether this declaration context is equivalent
1289 : /// to the declaration context DC.
1290 : bool Equals(const DeclContext *DC) const {
1291 : return DC && this->getPrimaryContext() == DC->getPrimaryContext();
1292 : }
1293 :
1294 : /// \brief Determine whether this declaration context encloses the
1295 : /// declaration context DC.
1296 : bool Encloses(const DeclContext *DC) const;
1297 :
1298 : /// \brief Find the nearest non-closure ancestor of this context,
1299 : /// i.e. the innermost semantic parent of this context which is not
1300 : /// a closure. A context may be its own non-closure ancestor.
1301 : Decl *getNonClosureAncestor();
1302 : const Decl *getNonClosureAncestor() const {
1303 : return const_cast<DeclContext*>(this)->getNonClosureAncestor();
1304 : }
1305 :
1306 : /// getPrimaryContext - There may be many different
1307 : /// declarations of the same entity (including forward declarations
1308 : /// of classes, multiple definitions of namespaces, etc.), each with
1309 : /// a different set of declarations. This routine returns the
1310 : /// "primary" DeclContext structure, which will contain the
1311 : /// information needed to perform name lookup into this context.
1312 : DeclContext *getPrimaryContext();
1313 : const DeclContext *getPrimaryContext() const {
1314 : return const_cast<DeclContext*>(this)->getPrimaryContext();
1315 : }
1316 :
1317 : /// getRedeclContext - Retrieve the context in which an entity conflicts with
1318 : /// other entities of the same name, or where it is a redeclaration if the
1319 : /// two entities are compatible. This skips through transparent contexts.
1320 : DeclContext *getRedeclContext();
1321 : const DeclContext *getRedeclContext() const {
1322 : return const_cast<DeclContext *>(this)->getRedeclContext();
1323 : }
1324 :
1325 : /// \brief Retrieve the nearest enclosing namespace context.
1326 : DeclContext *getEnclosingNamespaceContext();
1327 : const DeclContext *getEnclosingNamespaceContext() const {
1328 : return const_cast<DeclContext *>(this)->getEnclosingNamespaceContext();
1329 : }
1330 :
1331 : /// \brief Retrieve the outermost lexically enclosing record context.
1332 : RecordDecl *getOuterLexicalRecordContext();
1333 : const RecordDecl *getOuterLexicalRecordContext() const {
1334 : return const_cast<DeclContext *>(this)->getOuterLexicalRecordContext();
1335 : }
1336 :
1337 : /// \brief Test if this context is part of the enclosing namespace set of
1338 : /// the context NS, as defined in C++0x [namespace.def]p9. If either context
1339 : /// isn't a namespace, this is equivalent to Equals().
1340 : ///
1341 : /// The enclosing namespace set of a namespace is the namespace and, if it is
1342 : /// inline, its enclosing namespace, recursively.
1343 : bool InEnclosingNamespaceSetOf(const DeclContext *NS) const;
1344 :
1345 : /// \brief Collects all of the declaration contexts that are semantically
1346 : /// connected to this declaration context.
1347 : ///
1348 : /// For declaration contexts that have multiple semantically connected but
1349 : /// syntactically distinct contexts, such as C++ namespaces, this routine
1350 : /// retrieves the complete set of such declaration contexts in source order.
1351 : /// For example, given:
1352 : ///
1353 : /// \code
1354 : /// namespace N {
1355 : /// int x;
1356 : /// }
1357 : /// namespace N {
1358 : /// int y;
1359 : /// }
1360 : /// \endcode
1361 : ///
1362 : /// The \c Contexts parameter will contain both definitions of N.
1363 : ///
1364 : /// \param Contexts Will be cleared and set to the set of declaration
1365 : /// contexts that are semanticaly connected to this declaration context,
1366 : /// in source order, including this context (which may be the only result,
1367 : /// for non-namespace contexts).
1368 : void collectAllContexts(SmallVectorImpl<DeclContext *> &Contexts);
1369 :
1370 : /// decl_iterator - Iterates through the declarations stored
1371 : /// within this context.
1372 : class decl_iterator {
1373 : /// Current - The current declaration.
1374 : Decl *Current;
1375 :
1376 : public:
1377 : typedef Decl *value_type;
1378 : typedef const value_type &reference;
1379 : typedef const value_type *pointer;
1380 : typedef std::forward_iterator_tag iterator_category;
1381 : typedef std::ptrdiff_t difference_type;
1382 :
1383 25 : decl_iterator() : Current(nullptr) { }
1384 : explicit decl_iterator(Decl *C) : Current(C) { }
1385 :
1386 112 : reference operator*() const { return Current; }
1387 : // This doesn't meet the iterator requirements, but it's convenient
1388 : value_type operator->() const { return Current; }
1389 :
1390 : decl_iterator& operator++() {
1391 112 : Current = Current->getNextDeclInContext();
1392 112 : return *this;
1393 : }
1394 :
1395 : decl_iterator operator++(int) {
1396 : decl_iterator tmp(*this);
1397 : ++(*this);
1398 : return tmp;
1399 : }
1400 :
1401 : friend bool operator==(decl_iterator x, decl_iterator y) {
1402 : return x.Current == y.Current;
1403 : }
1404 : friend bool operator!=(decl_iterator x, decl_iterator y) {
1405 137 : return x.Current != y.Current;
1406 : }
1407 : };
1408 :
1409 : typedef llvm::iterator_range<decl_iterator> decl_range;
1410 :
1411 : /// decls_begin/decls_end - Iterate over the declarations stored in
1412 : /// this context.
1413 25 : decl_range decls() const { return decl_range(decls_begin(), decls_end()); }
1414 : decl_iterator decls_begin() const;
1415 25 : decl_iterator decls_end() const { return decl_iterator(); }
1416 : bool decls_empty() const;
1417 :
1418 : /// noload_decls_begin/end - Iterate over the declarations stored in this
1419 : /// context that are currently loaded; don't attempt to retrieve anything
1420 : /// from an external source.
1421 : decl_range noload_decls() const {
1422 : return decl_range(noload_decls_begin(), noload_decls_end());
1423 : }
1424 : decl_iterator noload_decls_begin() const { return decl_iterator(FirstDecl); }
1425 : decl_iterator noload_decls_end() const { return decl_iterator(); }
1426 :
1427 : /// specific_decl_iterator - Iterates over a subrange of
1428 : /// declarations stored in a DeclContext, providing only those that
1429 : /// are of type SpecificDecl (or a class derived from it). This
1430 : /// iterator is used, for example, to provide iteration over just
1431 : /// the fields within a RecordDecl (with SpecificDecl = FieldDecl).
1432 : template<typename SpecificDecl>
1433 : class specific_decl_iterator {
1434 : /// Current - The current, underlying declaration iterator, which
1435 : /// will either be NULL or will point to a declaration of
1436 : /// type SpecificDecl.
1437 : DeclContext::decl_iterator Current;
1438 :
1439 : /// SkipToNextDecl - Advances the current position up to the next
1440 : /// declaration of type SpecificDecl that also meets the criteria
1441 : /// required by Acceptable.
1442 : void SkipToNextDecl() {
1443 : while (*Current && !isa<SpecificDecl>(*Current))
1444 : ++Current;
1445 : }
1446 :
1447 : public:
1448 : typedef SpecificDecl *value_type;
1449 : // TODO: Add reference and pointer typedefs (with some appropriate proxy
1450 : // type) if we ever have a need for them.
1451 : typedef void reference;
1452 : typedef void pointer;
1453 : typedef std::iterator_traits<DeclContext::decl_iterator>::difference_type
1454 : difference_type;
1455 : typedef std::forward_iterator_tag iterator_category;
1456 :
1457 : specific_decl_iterator() : Current() { }
1458 :
1459 : /// specific_decl_iterator - Construct a new iterator over a
1460 : /// subset of the declarations the range [C,
1461 : /// end-of-declarations). If A is non-NULL, it is a pointer to a
1462 : /// member function of SpecificDecl that should return true for
1463 : /// all of the SpecificDecl instances that will be in the subset
1464 : /// of iterators. For example, if you want Objective-C instance
1465 : /// methods, SpecificDecl will be ObjCMethodDecl and A will be
1466 : /// &ObjCMethodDecl::isInstanceMethod.
1467 : explicit specific_decl_iterator(DeclContext::decl_iterator C) : Current(C) {
1468 : SkipToNextDecl();
1469 : }
1470 :
1471 : value_type operator*() const { return cast<SpecificDecl>(*Current); }
1472 : // This doesn't meet the iterator requirements, but it's convenient
1473 : value_type operator->() const { return **this; }
1474 :
1475 : specific_decl_iterator& operator++() {
1476 : ++Current;
1477 : SkipToNextDecl();
1478 : return *this;
1479 : }
1480 :
1481 : specific_decl_iterator operator++(int) {
1482 : specific_decl_iterator tmp(*this);
1483 : ++(*this);
1484 : return tmp;
1485 : }
1486 :
1487 : friend bool operator==(const specific_decl_iterator& x,
1488 : const specific_decl_iterator& y) {
1489 : return x.Current == y.Current;
1490 : }
1491 :
1492 : friend bool operator!=(const specific_decl_iterator& x,
1493 : const specific_decl_iterator& y) {
1494 : return x.Current != y.Current;
1495 : }
1496 : };
1497 :
1498 : /// \brief Iterates over a filtered subrange of declarations stored
1499 : /// in a DeclContext.
1500 : ///
1501 : /// This iterator visits only those declarations that are of type
1502 : /// SpecificDecl (or a class derived from it) and that meet some
1503 : /// additional run-time criteria. This iterator is used, for
1504 : /// example, to provide access to the instance methods within an
1505 : /// Objective-C interface (with SpecificDecl = ObjCMethodDecl and
1506 : /// Acceptable = ObjCMethodDecl::isInstanceMethod).
1507 : template<typename SpecificDecl, bool (SpecificDecl::*Acceptable)() const>
1508 : class filtered_decl_iterator {
1509 : /// Current - The current, underlying declaration iterator, which
1510 : /// will either be NULL or will point to a declaration of
1511 : /// type SpecificDecl.
1512 : DeclContext::decl_iterator Current;
1513 :
1514 : /// SkipToNextDecl - Advances the current position up to the next
1515 : /// declaration of type SpecificDecl that also meets the criteria
1516 : /// required by Acceptable.
1517 : void SkipToNextDecl() {
1518 : while (*Current &&
1519 : (!isa<SpecificDecl>(*Current) ||
1520 : (Acceptable && !(cast<SpecificDecl>(*Current)->*Acceptable)())))
1521 : ++Current;
1522 : }
1523 :
1524 : public:
1525 : typedef SpecificDecl *value_type;
1526 : // TODO: Add reference and pointer typedefs (with some appropriate proxy
1527 : // type) if we ever have a need for them.
1528 : typedef void reference;
1529 : typedef void pointer;
1530 : typedef std::iterator_traits<DeclContext::decl_iterator>::difference_type
1531 : difference_type;
1532 : typedef std::forward_iterator_tag iterator_category;
1533 :
1534 : filtered_decl_iterator() : Current() { }
1535 :
1536 : /// filtered_decl_iterator - Construct a new iterator over a
1537 : /// subset of the declarations the range [C,
1538 : /// end-of-declarations). If A is non-NULL, it is a pointer to a
1539 : /// member function of SpecificDecl that should return true for
1540 : /// all of the SpecificDecl instances that will be in the subset
1541 : /// of iterators. For example, if you want Objective-C instance
1542 : /// methods, SpecificDecl will be ObjCMethodDecl and A will be
1543 : /// &ObjCMethodDecl::isInstanceMethod.
1544 : explicit filtered_decl_iterator(DeclContext::decl_iterator C) : Current(C) {
1545 : SkipToNextDecl();
1546 : }
1547 :
1548 : value_type operator*() const { return cast<SpecificDecl>(*Current); }
1549 : value_type operator->() const { return cast<SpecificDecl>(*Current); }
1550 :
1551 : filtered_decl_iterator& operator++() {
1552 : ++Current;
1553 : SkipToNextDecl();
1554 : return *this;
1555 : }
1556 :
1557 : filtered_decl_iterator operator++(int) {
1558 : filtered_decl_iterator tmp(*this);
1559 : ++(*this);
1560 : return tmp;
1561 : }
1562 :
1563 : friend bool operator==(const filtered_decl_iterator& x,
1564 : const filtered_decl_iterator& y) {
1565 : return x.Current == y.Current;
1566 : }
1567 :
1568 : friend bool operator!=(const filtered_decl_iterator& x,
1569 : const filtered_decl_iterator& y) {
1570 : return x.Current != y.Current;
1571 : }
1572 : };
1573 :
1574 : /// @brief Add the declaration D into this context.
1575 : ///
1576 : /// This routine should be invoked when the declaration D has first
1577 : /// been declared, to place D into the context where it was
1578 : /// (lexically) defined. Every declaration must be added to one
1579 : /// (and only one!) context, where it can be visited via
1580 : /// [decls_begin(), decls_end()). Once a declaration has been added
1581 : /// to its lexical context, the corresponding DeclContext owns the
1582 : /// declaration.
1583 : ///
1584 : /// If D is also a NamedDecl, it will be made visible within its
1585 : /// semantic context via makeDeclVisibleInContext.
1586 : void addDecl(Decl *D);
1587 :
1588 : /// @brief Add the declaration D into this context, but suppress
1589 : /// searches for external declarations with the same name.
1590 : ///
1591 : /// Although analogous in function to addDecl, this removes an
1592 : /// important check. This is only useful if the Decl is being
1593 : /// added in response to an external search; in all other cases,
1594 : /// addDecl() is the right function to use.
1595 : /// See the ASTImporter for use cases.
1596 : void addDeclInternal(Decl *D);
1597 :
1598 : /// @brief Add the declaration D to this context without modifying
1599 : /// any lookup tables.
1600 : ///
1601 : /// This is useful for some operations in dependent contexts where
1602 : /// the semantic context might not be dependent; this basically
1603 : /// only happens with friends.
1604 : void addHiddenDecl(Decl *D);
1605 :
1606 : /// @brief Removes a declaration from this context.
1607 : void removeDecl(Decl *D);
1608 :
1609 : /// @brief Checks whether a declaration is in this context.
1610 : bool containsDecl(Decl *D) const;
1611 :
1612 : typedef DeclContextLookupResult lookup_result;
1613 : typedef lookup_result::iterator lookup_iterator;
1614 :
1615 : /// lookup - Find the declarations (if any) with the given Name in
1616 : /// this context. Returns a range of iterators that contains all of
1617 : /// the declarations with this name, with object, function, member,
1618 : /// and enumerator names preceding any tag name. Note that this
1619 : /// routine will not look into parent contexts.
1620 : lookup_result lookup(DeclarationName Name) const;
1621 :
1622 : /// \brief Find the declarations with the given name that are visible
1623 : /// within this context; don't attempt to retrieve anything from an
1624 : /// external source.
1625 : lookup_result noload_lookup(DeclarationName Name);
1626 :
1627 : /// \brief A simplistic name lookup mechanism that performs name lookup
1628 : /// into this declaration context without consulting the external source.
1629 : ///
1630 : /// This function should almost never be used, because it subverts the
1631 : /// usual relationship between a DeclContext and the external source.
1632 : /// See the ASTImporter for the (few, but important) use cases.
1633 : ///
1634 : /// FIXME: This is very inefficient; replace uses of it with uses of
1635 : /// noload_lookup.
1636 : void localUncachedLookup(DeclarationName Name,
1637 : SmallVectorImpl<NamedDecl *> &Results);
1638 :
1639 : /// @brief Makes a declaration visible within this context.
1640 : ///
1641 : /// This routine makes the declaration D visible to name lookup
1642 : /// within this context and, if this is a transparent context,
1643 : /// within its parent contexts up to the first enclosing
1644 : /// non-transparent context. Making a declaration visible within a
1645 : /// context does not transfer ownership of a declaration, and a
1646 : /// declaration can be visible in many contexts that aren't its
1647 : /// lexical context.
1648 : ///
1649 : /// If D is a redeclaration of an existing declaration that is
1650 : /// visible from this context, as determined by
1651 : /// NamedDecl::declarationReplaces, the previous declaration will be
1652 : /// replaced with D.
1653 : void makeDeclVisibleInContext(NamedDecl *D);
1654 :
1655 : /// all_lookups_iterator - An iterator that provides a view over the results
1656 : /// of looking up every possible name.
1657 : class all_lookups_iterator;
1658 :
1659 : typedef llvm::iterator_range<all_lookups_iterator> lookups_range;
1660 :
1661 : lookups_range lookups() const;
1662 : lookups_range noload_lookups() const;
1663 :
1664 : /// \brief Iterators over all possible lookups within this context.
1665 : all_lookups_iterator lookups_begin() const;
1666 : all_lookups_iterator lookups_end() const;
1667 :
1668 : /// \brief Iterators over all possible lookups within this context that are
1669 : /// currently loaded; don't attempt to retrieve anything from an external
1670 : /// source.
1671 : all_lookups_iterator noload_lookups_begin() const;
1672 : all_lookups_iterator noload_lookups_end() const;
1673 :
1674 : struct udir_iterator;
1675 : typedef llvm::iterator_adaptor_base<udir_iterator, lookup_iterator,
1676 : std::random_access_iterator_tag,
1677 : UsingDirectiveDecl *> udir_iterator_base;
1678 : struct udir_iterator : udir_iterator_base {
1679 : udir_iterator(lookup_iterator I) : udir_iterator_base(I) {}
1680 : UsingDirectiveDecl *operator*() const;
1681 : };
1682 :
1683 : typedef llvm::iterator_range<udir_iterator> udir_range;
1684 :
1685 : udir_range using_directives() const;
1686 :
1687 : // These are all defined in DependentDiagnostic.h.
1688 : class ddiag_iterator;
1689 : typedef llvm::iterator_range<DeclContext::ddiag_iterator> ddiag_range;
1690 :
1691 : inline ddiag_range ddiags() const;
1692 :
1693 : // Low-level accessors
1694 :
1695 : /// \brief Mark that there are external lexical declarations that we need
1696 : /// to include in our lookup table (and that are not available as external
1697 : /// visible lookups). These extra lookup results will be found by walking
1698 : /// the lexical declarations of this context. This should be used only if
1699 : /// setHasExternalLexicalStorage() has been called on any decl context for
1700 : /// which this is the primary context.
1701 : void setMustBuildLookupTable() {
1702 : assert(this == getPrimaryContext() &&
1703 : "should only be called on primary context");
1704 : HasLazyExternalLexicalLookups = true;
1705 : }
1706 :
1707 : /// \brief Retrieve the internal representation of the lookup structure.
1708 : /// This may omit some names if we are lazily building the structure.
1709 : StoredDeclsMap *getLookupPtr() const { return LookupPtr; }
1710 :
1711 : /// \brief Ensure the lookup structure is fully-built and return it.
1712 : StoredDeclsMap *buildLookup();
1713 :
1714 : /// \brief Whether this DeclContext has external storage containing
1715 : /// additional declarations that are lexically in this context.
1716 : bool hasExternalLexicalStorage() const { return ExternalLexicalStorage; }
1717 :
1718 : /// \brief State whether this DeclContext has external storage for
1719 : /// declarations lexically in this context.
1720 : void setHasExternalLexicalStorage(bool ES = true) {
1721 : ExternalLexicalStorage = ES;
1722 : }
1723 :
1724 : /// \brief Whether this DeclContext has external storage containing
1725 : /// additional declarations that are visible in this context.
1726 : bool hasExternalVisibleStorage() const { return ExternalVisibleStorage; }
1727 :
1728 : /// \brief State whether this DeclContext has external storage for
1729 : /// declarations visible in this context.
1730 : void setHasExternalVisibleStorage(bool ES = true) {
1731 : ExternalVisibleStorage = ES;
1732 : if (ES && LookupPtr)
1733 : NeedToReconcileExternalVisibleStorage = true;
1734 : }
1735 :
1736 : /// \brief Determine whether the given declaration is stored in the list of
1737 : /// declarations lexically within this context.
1738 : bool isDeclInLexicalTraversal(const Decl *D) const {
1739 : return D && (D->NextInContextAndBits.getPointer() || D == FirstDecl ||
1740 : D == LastDecl);
1741 : }
1742 :
1743 : static bool classof(const Decl *D);
1744 : static bool classof(const DeclContext *D) { return true; }
1745 :
1746 : void dumpDeclContext() const;
1747 : void dumpLookups() const;
1748 : void dumpLookups(llvm::raw_ostream &OS, bool DumpDecls = false) const;
1749 :
1750 : private:
1751 : void reconcileExternalVisibleStorage() const;
1752 : bool LoadLexicalDeclsFromExternalStorage() const;
1753 :
1754 : /// @brief Makes a declaration visible within this context, but
1755 : /// suppresses searches for external declarations with the same
1756 : /// name.
1757 : ///
1758 : /// Analogous to makeDeclVisibleInContext, but for the exclusive
1759 : /// use of addDeclInternal().
1760 : void makeDeclVisibleInContextInternal(NamedDecl *D);
1761 :
1762 : friend class DependentDiagnostic;
1763 : StoredDeclsMap *CreateStoredDeclsMap(ASTContext &C) const;
1764 :
1765 : void buildLookupImpl(DeclContext *DCtx, bool Internal);
1766 : void makeDeclVisibleInContextWithFlags(NamedDecl *D, bool Internal,
1767 : bool Rediscoverable);
1768 : void makeDeclVisibleInContextImpl(NamedDecl *D, bool Internal);
1769 : };
1770 :
1771 : inline bool Decl::isTemplateParameter() const {
1772 : return getKind() == TemplateTypeParm || getKind() == NonTypeTemplateParm ||
1773 : getKind() == TemplateTemplateParm;
1774 : }
1775 :
1776 : // Specialization selected when ToTy is not a known subclass of DeclContext.
1777 : template <class ToTy,
1778 : bool IsKnownSubtype = ::std::is_base_of<DeclContext, ToTy>::value>
1779 : struct cast_convert_decl_context {
1780 : static const ToTy *doit(const DeclContext *Val) {
1781 : return static_cast<const ToTy*>(Decl::castFromDeclContext(Val));
1782 : }
1783 :
1784 : static ToTy *doit(DeclContext *Val) {
1785 : return static_cast<ToTy*>(Decl::castFromDeclContext(Val));
1786 : }
1787 : };
1788 :
1789 : // Specialization selected when ToTy is a known subclass of DeclContext.
1790 : template <class ToTy>
1791 : struct cast_convert_decl_context<ToTy, true> {
1792 : static const ToTy *doit(const DeclContext *Val) {
1793 : return static_cast<const ToTy*>(Val);
1794 : }
1795 :
1796 : static ToTy *doit(DeclContext *Val) {
1797 : return static_cast<ToTy*>(Val);
1798 : }
1799 : };
1800 :
1801 :
1802 : } // end clang.
1803 :
1804 : namespace llvm {
1805 :
1806 : /// isa<T>(DeclContext*)
1807 : template <typename To>
1808 : struct isa_impl<To, ::clang::DeclContext> {
1809 : static bool doit(const ::clang::DeclContext &Val) {
1810 : return To::classofKind(Val.getDeclKind());
1811 : }
1812 : };
1813 :
1814 : /// cast<T>(DeclContext*)
1815 : template<class ToTy>
1816 : struct cast_convert_val<ToTy,
1817 : const ::clang::DeclContext,const ::clang::DeclContext> {
1818 : static const ToTy &doit(const ::clang::DeclContext &Val) {
1819 : return *::clang::cast_convert_decl_context<ToTy>::doit(&Val);
1820 : }
1821 : };
1822 : template<class ToTy>
1823 : struct cast_convert_val<ToTy, ::clang::DeclContext, ::clang::DeclContext> {
1824 : static ToTy &doit(::clang::DeclContext &Val) {
1825 : return *::clang::cast_convert_decl_context<ToTy>::doit(&Val);
1826 : }
1827 : };
1828 : template<class ToTy>
1829 : struct cast_convert_val<ToTy,
1830 : const ::clang::DeclContext*, const ::clang::DeclContext*> {
1831 : static const ToTy *doit(const ::clang::DeclContext *Val) {
1832 : return ::clang::cast_convert_decl_context<ToTy>::doit(Val);
1833 : }
1834 : };
1835 : template<class ToTy>
1836 : struct cast_convert_val<ToTy, ::clang::DeclContext*, ::clang::DeclContext*> {
1837 : static ToTy *doit(::clang::DeclContext *Val) {
1838 : return ::clang::cast_convert_decl_context<ToTy>::doit(Val);
1839 : }
1840 : };
1841 :
1842 : /// Implement cast_convert_val for Decl -> DeclContext conversions.
1843 : template<class FromTy>
1844 : struct cast_convert_val< ::clang::DeclContext, FromTy, FromTy> {
1845 : static ::clang::DeclContext &doit(const FromTy &Val) {
1846 : return *FromTy::castToDeclContext(&Val);
1847 : }
1848 : };
1849 :
1850 : template<class FromTy>
1851 : struct cast_convert_val< ::clang::DeclContext, FromTy*, FromTy*> {
1852 : static ::clang::DeclContext *doit(const FromTy *Val) {
1853 25 : return FromTy::castToDeclContext(Val);
1854 : }
1855 : };
1856 :
1857 : template<class FromTy>
1858 : struct cast_convert_val< const ::clang::DeclContext, FromTy, FromTy> {
1859 : static const ::clang::DeclContext &doit(const FromTy &Val) {
1860 : return *FromTy::castToDeclContext(&Val);
1861 : }
1862 : };
1863 :
1864 : template<class FromTy>
1865 : struct cast_convert_val< const ::clang::DeclContext, FromTy*, FromTy*> {
1866 : static const ::clang::DeclContext *doit(const FromTy *Val) {
1867 : return FromTy::castToDeclContext(Val);
1868 : }
1869 : };
1870 :
1871 : } // end namespace llvm
1872 :
1873 : #endif
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