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_MULTIPLEXEXTERNALSEMASOURCE_H
14 #define LLVM_CLANG_SEMA_MULTIPLEXEXTERNALSEMASOURCE_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 /// 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 ///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() override;
56 ///Appends new source to the source list.
58 ///\param[in] source - An ExternalSemaSource.
60 void addSource(ExternalSemaSource &source);
62 //===--------------------------------------------------------------------===//
64 //===--------------------------------------------------------------------===//
66 /// Resolve a declaration ID into a declaration, potentially
67 /// building a new declaration.
68 Decl *GetExternalDecl(uint32_t ID) override;
70 /// 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 /// Resolve a selector ID into a selector.
75 Selector GetExternalSelector(uint32_t ID) override;
77 /// Returns the number of selectors known to the external AST
79 uint32_t GetNumExternalSelectors() override;
81 /// Resolve the offset of a statement in the decl stream into
83 Stmt *GetExternalDeclStmt(uint64_t Offset) override;
85 /// 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 /// Resolve a handle to a list of ctor initializers into the list of
90 /// initializers themselves.
91 CXXCtorInitializer **GetExternalCXXCtorInitializers(uint64_t Offset) override;
93 ExtKind hasExternalDefinitions(const Decl *D) override;
95 /// Find all declarations with the given name in the
97 bool FindExternalVisibleDeclsByName(const DeclContext *DC,
98 DeclarationName Name) override;
100 /// Ensures that the table of all visible declarations inside this
101 /// context is up to date.
102 void completeVisibleDeclsMap(const DeclContext *DC) override;
104 /// Finds all declarations lexically contained within the given
105 /// DeclContext, after applying an optional filter predicate.
107 /// \param IsKindWeWant a predicate function that returns true if the passed
108 /// declaration kind is one we are looking for.
110 FindExternalLexicalDecls(const DeclContext *DC,
111 llvm::function_ref<bool(Decl::Kind)> IsKindWeWant,
112 SmallVectorImpl<Decl *> &Result) override;
114 /// Get the decls that are contained in a file in the Offset/Length
115 /// range. \p Length can be 0 to indicate a point at \p Offset instead of
117 void FindFileRegionDecls(FileID File, unsigned Offset,unsigned Length,
118 SmallVectorImpl<Decl *> &Decls) override;
120 /// Gives the external AST source an opportunity to complete
121 /// an incomplete type.
122 void CompleteType(TagDecl *Tag) override;
124 /// Gives the external AST source an opportunity to complete an
125 /// incomplete Objective-C class.
127 /// This routine will only be invoked if the "externally completed" bit is
128 /// set on the ObjCInterfaceDecl via the function
129 /// \c ObjCInterfaceDecl::setExternallyCompleted().
130 void CompleteType(ObjCInterfaceDecl *Class) override;
132 /// Loads comment ranges.
133 void ReadComments() override;
135 /// Notify ExternalASTSource that we started deserialization of
136 /// a decl or type so until FinishedDeserializing is called there may be
137 /// decls that are initializing. Must be paired with FinishedDeserializing.
138 void StartedDeserializing() override;
140 /// Notify ExternalASTSource that we finished the deserialization of
141 /// a decl or type. Must be paired with StartedDeserializing.
142 void FinishedDeserializing() override;
144 /// Function that will be invoked when we begin parsing a new
145 /// translation unit involving this external AST source.
146 void StartTranslationUnit(ASTConsumer *Consumer) override;
148 /// Print any statistics that have been gathered regarding
149 /// the external AST source.
150 void PrintStats() override;
152 /// Retrieve the module that corresponds to the given module ID.
153 Module *getModule(unsigned ID) override;
155 bool DeclIsFromPCHWithObjectFile(const Decl *D) override;
157 /// Perform layout on the given record.
159 /// This routine allows the external AST source to provide an specific
160 /// layout for a record, overriding the layout that would normally be
161 /// constructed. It is intended for clients who receive specific layout
162 /// details rather than source code (such as LLDB). The client is expected
163 /// to fill in the field offsets, base offsets, virtual base offsets, and
164 /// complete object size.
166 /// \param Record The record whose layout is being requested.
168 /// \param Size The final size of the record, in bits.
170 /// \param Alignment The final alignment of the record, in bits.
172 /// \param FieldOffsets The offset of each of the fields within the record,
173 /// expressed in bits. All of the fields must be provided with offsets.
175 /// \param BaseOffsets The offset of each of the direct, non-virtual base
176 /// classes. If any bases are not given offsets, the bases will be laid
177 /// out according to the ABI.
179 /// \param VirtualBaseOffsets The offset of each of the virtual base classes
180 /// (either direct or not). If any bases are not given offsets, the bases will
181 /// be laid out according to the ABI.
183 /// \returns true if the record layout was provided, false otherwise.
185 layoutRecordType(const RecordDecl *Record,
186 uint64_t &Size, uint64_t &Alignment,
187 llvm::DenseMap<const FieldDecl *, uint64_t> &FieldOffsets,
188 llvm::DenseMap<const CXXRecordDecl *, CharUnits> &BaseOffsets,
189 llvm::DenseMap<const CXXRecordDecl *,
190 CharUnits> &VirtualBaseOffsets) override;
192 /// Return the amount of memory used by memory buffers, breaking down
193 /// by heap-backed versus mmap'ed memory.
194 void getMemoryBufferSizes(MemoryBufferSizes &sizes) const override;
196 //===--------------------------------------------------------------------===//
197 // ExternalSemaSource.
198 //===--------------------------------------------------------------------===//
200 /// Initialize the semantic source with the Sema instance
201 /// being used to perform semantic analysis on the abstract syntax
203 void InitializeSema(Sema &S) override;
205 /// Inform the semantic consumer that Sema is no longer available.
206 void ForgetSema() override;
208 /// Load the contents of the global method pool for a given
210 void ReadMethodPool(Selector Sel) override;
212 /// Load the contents of the global method pool for a given
213 /// selector if necessary.
214 void updateOutOfDateSelector(Selector Sel) override;
216 /// Load the set of namespaces that are known to the external source,
217 /// which will be used during typo correction.
219 ReadKnownNamespaces(SmallVectorImpl<NamespaceDecl*> &Namespaces) override;
221 /// Load the set of used but not defined functions or variables with
222 /// internal linkage, or used but not defined inline functions.
223 void ReadUndefinedButUsed(
224 llvm::MapVector<NamedDecl *, SourceLocation> &Undefined) override;
226 void ReadMismatchingDeleteExpressions(llvm::MapVector<
227 FieldDecl *, llvm::SmallVector<std::pair<SourceLocation, bool>, 4>> &
230 /// Do last resort, unqualified lookup on a LookupResult that
231 /// Sema cannot find.
233 /// \param R a LookupResult that is being recovered.
235 /// \param S the Scope of the identifier occurrence.
237 /// \return true to tell Sema to recover using the LookupResult.
238 bool LookupUnqualified(LookupResult &R, Scope *S) override;
240 /// Read the set of tentative definitions known to the external Sema
243 /// The external source should append its own tentative definitions to the
244 /// given vector of tentative definitions. Note that this routine may be
245 /// invoked multiple times; the external source should take care not to
246 /// introduce the same declarations repeatedly.
247 void ReadTentativeDefinitions(SmallVectorImpl<VarDecl*> &Defs) override;
249 /// Read the set of unused file-scope declarations known to the
250 /// external Sema source.
252 /// The external source should append its own unused, filed-scope to the
253 /// given vector of declarations. Note that this routine may be
254 /// invoked multiple times; the external source should take care not to
255 /// introduce the same declarations repeatedly.
256 void ReadUnusedFileScopedDecls(
257 SmallVectorImpl<const DeclaratorDecl*> &Decls) override;
259 /// Read the set of delegating constructors known to the
260 /// external Sema source.
262 /// The external source should append its own delegating constructors to the
263 /// given vector of declarations. Note that this routine may be
264 /// invoked multiple times; the external source should take care not to
265 /// introduce the same declarations repeatedly.
266 void ReadDelegatingConstructors(
267 SmallVectorImpl<CXXConstructorDecl*> &Decls) override;
269 /// Read the set of ext_vector type declarations known to the
270 /// external Sema source.
272 /// The external source should append its own ext_vector type declarations to
273 /// the given vector of declarations. Note that this routine may be
274 /// invoked multiple times; the external source should take care not to
275 /// introduce the same declarations repeatedly.
276 void ReadExtVectorDecls(SmallVectorImpl<TypedefNameDecl*> &Decls) override;
278 /// Read the set of potentially unused typedefs known to the source.
280 /// The external source should append its own potentially unused local
281 /// typedefs to the given vector of declarations. Note that this routine may
282 /// be invoked multiple times; the external source should take care not to
283 /// introduce the same declarations repeatedly.
284 void ReadUnusedLocalTypedefNameCandidates(
285 llvm::SmallSetVector<const TypedefNameDecl *, 4> &Decls) override;
287 /// Read the set of referenced selectors known to the
288 /// external Sema source.
290 /// The external source should append its own referenced selectors to the
291 /// given vector of selectors. Note that this routine
292 /// may be invoked multiple times; the external source should take care not
293 /// to introduce the same selectors repeatedly.
294 void ReadReferencedSelectors(SmallVectorImpl<std::pair<Selector,
295 SourceLocation> > &Sels) override;
297 /// Read the set of weak, undeclared identifiers known to the
298 /// external Sema source.
300 /// The external source should append its own weak, undeclared identifiers to
301 /// the given vector. Note that this routine may be invoked multiple times;
302 /// the external source should take care not to introduce the same identifiers
304 void ReadWeakUndeclaredIdentifiers(
305 SmallVectorImpl<std::pair<IdentifierInfo*, WeakInfo> > &WI) override;
307 /// Read the set of used vtables known to the external Sema source.
309 /// The external source should append its own used vtables to the given
310 /// vector. Note that this routine may be invoked multiple times; the external
311 /// source should take care not to introduce the same vtables repeatedly.
312 void ReadUsedVTables(SmallVectorImpl<ExternalVTableUse> &VTables) override;
314 /// Read the set of pending instantiations known to the external
317 /// The external source should append its own pending instantiations to the
318 /// given vector. Note that this routine may be invoked multiple times; the
319 /// external source should take care not to introduce the same instantiations
321 void ReadPendingInstantiations(
322 SmallVectorImpl<std::pair<ValueDecl*, SourceLocation> >& Pending) override;
324 /// Read the set of late parsed template functions for this source.
326 /// The external source should insert its own late parsed template functions
327 /// into the map. Note that this routine may be invoked multiple times; the
328 /// external source should take care not to introduce the same map entries
330 void ReadLateParsedTemplates(
331 llvm::MapVector<const FunctionDecl *, std::unique_ptr<LateParsedTemplate>>
334 /// \copydoc ExternalSemaSource::CorrectTypo
335 /// \note Returns the first nonempty correction.
336 TypoCorrection CorrectTypo(const DeclarationNameInfo &Typo,
337 int LookupKind, Scope *S, CXXScopeSpec *SS,
338 CorrectionCandidateCallback &CCC,
339 DeclContext *MemberContext,
340 bool EnteringContext,
341 const ObjCObjectPointerType *OPT) override;
343 /// Produces a diagnostic note if one of the attached sources
344 /// contains a complete definition for \p T. Queries the sources in list
345 /// order until the first one claims that a diagnostic was produced.
347 /// \param Loc the location at which a complete type was required but not
350 /// \param T the \c QualType that should have been complete at \p Loc
352 /// \return true if a diagnostic was produced, false otherwise.
353 bool MaybeDiagnoseMissingCompleteType(SourceLocation Loc,
354 QualType T) override;
356 // isa/cast/dyn_cast support
357 static bool classof(const MultiplexExternalSemaSource*) { return true; }
358 //static bool classof(const ExternalSemaSource*) { return true; }
361 } // end namespace clang