1 //===--- MultiplexExternalSemaSource.h - External Sema Interface-*- C++ -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file defines ExternalSemaSource interface, dispatching to all clients
12 //===----------------------------------------------------------------------===//
13 #ifndef LLVM_CLANG_SEMA_MULTIPLEX_EXTERNAL_SEMA_SOURCE_H
14 #define LLVM_CLANG_SEMA_MULTIPLEX_EXTERNAL_SEMA_SOURCE_H
16 #include "clang/Sema/ExternalSemaSource.h"
17 #include "clang/Sema/Weak.h"
18 #include "llvm/ADT/SmallVector.h"
23 class CXXConstructorDecl;
26 struct ExternalVTableUse;
31 class TypedefNameDecl;
36 /// \brief An abstract interface that should be implemented by
37 /// external AST sources that also provide information for semantic
39 class MultiplexExternalSemaSource : public ExternalSemaSource {
42 SmallVector<ExternalSemaSource *, 2> Sources; // doesn't own them.
46 ///\brief Constructs a new multiplexing external sema source and appends the
47 /// given element to it.
49 ///\param[in] s1 - A non-null (old) ExternalSemaSource.
50 ///\param[in] s2 - A non-null (new) ExternalSemaSource.
52 MultiplexExternalSemaSource(ExternalSemaSource& s1, ExternalSemaSource& s2);
54 ~MultiplexExternalSemaSource();
56 ///\brief Appends new source to the source list.
58 ///\param[in] source - An ExternalSemaSource.
60 void addSource(ExternalSemaSource &source);
62 //===--------------------------------------------------------------------===//
64 //===--------------------------------------------------------------------===//
66 /// \brief Resolve a declaration ID into a declaration, potentially
67 /// building a new declaration.
68 Decl *GetExternalDecl(uint32_t ID) override;
70 /// \brief Complete the redeclaration chain if it's been extended since the
71 /// previous generation of the AST source.
72 void CompleteRedeclChain(const Decl *D) override;
74 /// \brief Resolve a selector ID into a selector.
75 Selector GetExternalSelector(uint32_t ID) override;
77 /// \brief Returns the number of selectors known to the external AST
79 uint32_t GetNumExternalSelectors() override;
81 /// \brief Resolve the offset of a statement in the decl stream into
83 Stmt *GetExternalDeclStmt(uint64_t Offset) override;
85 /// \brief Resolve the offset of a set of C++ base specifiers in the decl
86 /// stream into an array of specifiers.
87 CXXBaseSpecifier *GetExternalCXXBaseSpecifiers(uint64_t Offset) override;
89 /// \brief Find all declarations with the given name in the
92 FindExternalVisibleDeclsByName(const DeclContext *DC, DeclarationName Name) override;
94 /// \brief Ensures that the table of all visible declarations inside this
95 /// context is up to date.
96 void completeVisibleDeclsMap(const DeclContext *DC) override;
98 /// \brief Finds all declarations lexically contained within the given
99 /// DeclContext, after applying an optional filter predicate.
101 /// \param isKindWeWant a predicate function that returns true if the passed
102 /// declaration kind is one we are looking for. If NULL, all declarations
105 /// \return an indication of whether the load succeeded or failed.
106 ExternalLoadResult FindExternalLexicalDecls(const DeclContext *DC,
107 bool (*isKindWeWant)(Decl::Kind),
108 SmallVectorImpl<Decl*> &Result) override;
110 /// \brief Finds all declarations lexically contained within the given
113 /// \return true if an error occurred
114 ExternalLoadResult FindExternalLexicalDecls(const DeclContext *DC,
115 SmallVectorImpl<Decl*> &Result) {
116 return FindExternalLexicalDecls(DC, nullptr, Result);
119 template <typename DeclTy>
120 ExternalLoadResult FindExternalLexicalDeclsBy(const DeclContext *DC,
121 SmallVectorImpl<Decl*> &Result) {
122 return FindExternalLexicalDecls(DC, DeclTy::classofKind, Result);
125 /// \brief Get the decls that are contained in a file in the Offset/Length
126 /// range. \p Length can be 0 to indicate a point at \p Offset instead of
128 void FindFileRegionDecls(FileID File, unsigned Offset,unsigned Length,
129 SmallVectorImpl<Decl *> &Decls) override;
131 /// \brief Gives the external AST source an opportunity to complete
132 /// an incomplete type.
133 void CompleteType(TagDecl *Tag) override;
135 /// \brief Gives the external AST source an opportunity to complete an
136 /// incomplete Objective-C class.
138 /// This routine will only be invoked if the "externally completed" bit is
139 /// set on the ObjCInterfaceDecl via the function
140 /// \c ObjCInterfaceDecl::setExternallyCompleted().
141 void CompleteType(ObjCInterfaceDecl *Class) override;
143 /// \brief Loads comment ranges.
144 void ReadComments() override;
146 /// \brief Notify ExternalASTSource that we started deserialization of
147 /// a decl or type so until FinishedDeserializing is called there may be
148 /// decls that are initializing. Must be paired with FinishedDeserializing.
149 void StartedDeserializing() override;
151 /// \brief Notify ExternalASTSource that we finished the deserialization of
152 /// a decl or type. Must be paired with StartedDeserializing.
153 void FinishedDeserializing() override;
155 /// \brief Function that will be invoked when we begin parsing a new
156 /// translation unit involving this external AST source.
157 void StartTranslationUnit(ASTConsumer *Consumer) override;
159 /// \brief Print any statistics that have been gathered regarding
160 /// the external AST source.
161 void PrintStats() override;
164 /// \brief Perform layout on the given record.
166 /// This routine allows the external AST source to provide an specific
167 /// layout for a record, overriding the layout that would normally be
168 /// constructed. It is intended for clients who receive specific layout
169 /// details rather than source code (such as LLDB). The client is expected
170 /// to fill in the field offsets, base offsets, virtual base offsets, and
171 /// complete object size.
173 /// \param Record The record whose layout is being requested.
175 /// \param Size The final size of the record, in bits.
177 /// \param Alignment The final alignment of the record, in bits.
179 /// \param FieldOffsets The offset of each of the fields within the record,
180 /// expressed in bits. All of the fields must be provided with offsets.
182 /// \param BaseOffsets The offset of each of the direct, non-virtual base
183 /// classes. If any bases are not given offsets, the bases will be laid
184 /// out according to the ABI.
186 /// \param VirtualBaseOffsets The offset of each of the virtual base classes
187 /// (either direct or not). If any bases are not given offsets, the bases will
188 /// be laid out according to the ABI.
190 /// \returns true if the record layout was provided, false otherwise.
192 layoutRecordType(const RecordDecl *Record,
193 uint64_t &Size, uint64_t &Alignment,
194 llvm::DenseMap<const FieldDecl *, uint64_t> &FieldOffsets,
195 llvm::DenseMap<const CXXRecordDecl *, CharUnits> &BaseOffsets,
196 llvm::DenseMap<const CXXRecordDecl *,
197 CharUnits> &VirtualBaseOffsets) override;
199 /// Return the amount of memory used by memory buffers, breaking down
200 /// by heap-backed versus mmap'ed memory.
201 void getMemoryBufferSizes(MemoryBufferSizes &sizes) const override;
203 //===--------------------------------------------------------------------===//
204 // ExternalSemaSource.
205 //===--------------------------------------------------------------------===//
207 /// \brief Initialize the semantic source with the Sema instance
208 /// being used to perform semantic analysis on the abstract syntax
210 void InitializeSema(Sema &S) override;
212 /// \brief Inform the semantic consumer that Sema is no longer available.
213 void ForgetSema() override;
215 /// \brief Load the contents of the global method pool for a given
217 void ReadMethodPool(Selector Sel) override;
219 /// \brief Load the set of namespaces that are known to the external source,
220 /// which will be used during typo correction.
222 ReadKnownNamespaces(SmallVectorImpl<NamespaceDecl*> &Namespaces) override;
224 /// \brief Load the set of used but not defined functions or variables with
225 /// internal linkage, or used but not defined inline functions.
226 void ReadUndefinedButUsed(
227 llvm::DenseMap<NamedDecl*, SourceLocation> &Undefined) override;
229 /// \brief Do last resort, unqualified lookup on a LookupResult that
230 /// Sema cannot find.
232 /// \param R a LookupResult that is being recovered.
234 /// \param S the Scope of the identifier occurrence.
236 /// \return true to tell Sema to recover using the LookupResult.
237 bool LookupUnqualified(LookupResult &R, Scope *S) override;
239 /// \brief Read the set of tentative definitions known to the external Sema
242 /// The external source should append its own tentative definitions to the
243 /// given vector of tentative definitions. Note that this routine may be
244 /// invoked multiple times; the external source should take care not to
245 /// introduce the same declarations repeatedly.
246 void ReadTentativeDefinitions(SmallVectorImpl<VarDecl*> &Defs) override;
248 /// \brief Read the set of unused file-scope declarations known to the
249 /// external Sema source.
251 /// The external source should append its own unused, filed-scope to the
252 /// given vector of declarations. Note that this routine may be
253 /// invoked multiple times; the external source should take care not to
254 /// introduce the same declarations repeatedly.
255 void ReadUnusedFileScopedDecls(
256 SmallVectorImpl<const DeclaratorDecl*> &Decls) override;
258 /// \brief Read the set of delegating constructors known to the
259 /// external Sema source.
261 /// The external source should append its own delegating constructors to the
262 /// given vector of declarations. Note that this routine may be
263 /// invoked multiple times; the external source should take care not to
264 /// introduce the same declarations repeatedly.
265 void ReadDelegatingConstructors(
266 SmallVectorImpl<CXXConstructorDecl*> &Decls) override;
268 /// \brief Read the set of ext_vector type declarations known to the
269 /// external Sema source.
271 /// The external source should append its own ext_vector type declarations to
272 /// the given vector of declarations. Note that this routine may be
273 /// invoked multiple times; the external source should take care not to
274 /// introduce the same declarations repeatedly.
275 void ReadExtVectorDecls(SmallVectorImpl<TypedefNameDecl*> &Decls) override;
277 /// \brief Read the set of dynamic classes known to the external Sema source.
279 /// The external source should append its own dynamic classes to
280 /// the given vector of declarations. Note that this routine may be
281 /// invoked multiple times; the external source should take care not to
282 /// introduce the same declarations repeatedly.
283 void ReadDynamicClasses(SmallVectorImpl<CXXRecordDecl*> &Decls) override;
285 /// \brief Read the set of locally-scoped extern "C" declarations known to the
286 /// external Sema source.
288 /// The external source should append its own locally-scoped external
289 /// declarations to the given vector of declarations. Note that this routine
290 /// may be invoked multiple times; the external source should take care not
291 /// to introduce the same declarations repeatedly.
292 void ReadLocallyScopedExternCDecls(
293 SmallVectorImpl<NamedDecl*> &Decls) override;
295 /// \brief Read the set of referenced selectors known to the
296 /// external Sema source.
298 /// The external source should append its own referenced selectors to the
299 /// given vector of selectors. Note that this routine
300 /// may be invoked multiple times; the external source should take care not
301 /// to introduce the same selectors repeatedly.
302 void ReadReferencedSelectors(SmallVectorImpl<std::pair<Selector,
303 SourceLocation> > &Sels) override;
305 /// \brief Read the set of weak, undeclared identifiers known to the
306 /// external Sema source.
308 /// The external source should append its own weak, undeclared identifiers to
309 /// the given vector. Note that this routine may be invoked multiple times;
310 /// the external source should take care not to introduce the same identifiers
312 void ReadWeakUndeclaredIdentifiers(
313 SmallVectorImpl<std::pair<IdentifierInfo*, WeakInfo> > &WI) override;
315 /// \brief Read the set of used vtables known to the external Sema source.
317 /// The external source should append its own used vtables to the given
318 /// vector. Note that this routine may be invoked multiple times; the external
319 /// source should take care not to introduce the same vtables repeatedly.
320 void ReadUsedVTables(SmallVectorImpl<ExternalVTableUse> &VTables) override;
322 /// \brief Read the set of pending instantiations known to the external
325 /// The external source should append its own pending instantiations to the
326 /// given vector. Note that this routine may be invoked multiple times; the
327 /// external source should take care not to introduce the same instantiations
329 void ReadPendingInstantiations(
330 SmallVectorImpl<std::pair<ValueDecl*, SourceLocation> >& Pending) override;
332 /// \brief Read the set of late parsed template functions for this source.
334 /// The external source should insert its own late parsed template functions
335 /// into the map. Note that this routine may be invoked multiple times; the
336 /// external source should take care not to introduce the same map entries
338 void ReadLateParsedTemplates(
339 llvm::DenseMap<const FunctionDecl *,
340 LateParsedTemplate *> &LPTMap) override;
342 /// \copydoc ExternalSemaSource::CorrectTypo
343 /// \note Returns the first nonempty correction.
344 TypoCorrection CorrectTypo(const DeclarationNameInfo &Typo,
345 int LookupKind, Scope *S, CXXScopeSpec *SS,
346 CorrectionCandidateCallback &CCC,
347 DeclContext *MemberContext,
348 bool EnteringContext,
349 const ObjCObjectPointerType *OPT) override;
351 /// \brief Produces a diagnostic note if one of the attached sources
352 /// contains a complete definition for \p T. Queries the sources in list
353 /// order until the first one claims that a diagnostic was produced.
355 /// \param Loc the location at which a complete type was required but not
358 /// \param T the \c QualType that should have been complete at \p Loc
360 /// \return true if a diagnostic was produced, false otherwise.
361 bool MaybeDiagnoseMissingCompleteType(SourceLocation Loc,
362 QualType T) override;
364 // isa/cast/dyn_cast support
365 static bool classof(const MultiplexExternalSemaSource*) { return true; }
366 //static bool classof(const ExternalSemaSource*) { return true; }
369 } // end namespace clang
371 #endif // LLVM_CLANG_SEMA_MULTIPLEX_EXTERNAL_SEMA_SOURCE_H