1 //===--- MultiplexExternalSemaSource.h - External Sema Interface-*- C++ -*-===//
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
7 //===----------------------------------------------------------------------===//
9 // This file defines ExternalSemaSource interface, dispatching to all clients
11 //===----------------------------------------------------------------------===//
12 #ifndef LLVM_CLANG_SEMA_MULTIPLEXEXTERNALSEMASOURCE_H
13 #define LLVM_CLANG_SEMA_MULTIPLEXEXTERNALSEMASOURCE_H
15 #include "clang/Sema/ExternalSemaSource.h"
16 #include "clang/Sema/Weak.h"
17 #include "llvm/ADT/SmallVector.h"
22 class CXXConstructorDecl;
25 struct ExternalVTableUse;
30 class TypedefNameDecl;
35 /// An abstract interface that should be implemented by
36 /// external AST sources that also provide information for semantic
38 class MultiplexExternalSemaSource : public ExternalSemaSource {
41 SmallVector<ExternalSemaSource *, 2> Sources; // doesn't own them.
45 ///Constructs a new multiplexing external sema source and appends the
46 /// given element to it.
48 ///\param[in] s1 - A non-null (old) ExternalSemaSource.
49 ///\param[in] s2 - A non-null (new) ExternalSemaSource.
51 MultiplexExternalSemaSource(ExternalSemaSource& s1, ExternalSemaSource& s2);
53 ~MultiplexExternalSemaSource() override;
55 ///Appends new source to the source list.
57 ///\param[in] source - An ExternalSemaSource.
59 void addSource(ExternalSemaSource &source);
61 //===--------------------------------------------------------------------===//
63 //===--------------------------------------------------------------------===//
65 /// Resolve a declaration ID into a declaration, potentially
66 /// building a new declaration.
67 Decl *GetExternalDecl(uint32_t ID) override;
69 /// Complete the redeclaration chain if it's been extended since the
70 /// previous generation of the AST source.
71 void CompleteRedeclChain(const Decl *D) override;
73 /// Resolve a selector ID into a selector.
74 Selector GetExternalSelector(uint32_t ID) override;
76 /// Returns the number of selectors known to the external AST
78 uint32_t GetNumExternalSelectors() override;
80 /// Resolve the offset of a statement in the decl stream into
82 Stmt *GetExternalDeclStmt(uint64_t Offset) override;
84 /// Resolve the offset of a set of C++ base specifiers in the decl
85 /// stream into an array of specifiers.
86 CXXBaseSpecifier *GetExternalCXXBaseSpecifiers(uint64_t Offset) override;
88 /// Resolve a handle to a list of ctor initializers into the list of
89 /// initializers themselves.
90 CXXCtorInitializer **GetExternalCXXCtorInitializers(uint64_t Offset) override;
92 ExtKind hasExternalDefinitions(const Decl *D) override;
94 /// Find all declarations with the given name in the
96 bool FindExternalVisibleDeclsByName(const DeclContext *DC,
97 DeclarationName Name) override;
99 /// Ensures that the table of all visible declarations inside this
100 /// context is up to date.
101 void completeVisibleDeclsMap(const DeclContext *DC) override;
103 /// Finds all declarations lexically contained within the given
104 /// DeclContext, after applying an optional filter predicate.
106 /// \param IsKindWeWant a predicate function that returns true if the passed
107 /// declaration kind is one we are looking for.
109 FindExternalLexicalDecls(const DeclContext *DC,
110 llvm::function_ref<bool(Decl::Kind)> IsKindWeWant,
111 SmallVectorImpl<Decl *> &Result) override;
113 /// Get the decls that are contained in a file in the Offset/Length
114 /// range. \p Length can be 0 to indicate a point at \p Offset instead of
116 void FindFileRegionDecls(FileID File, unsigned Offset,unsigned Length,
117 SmallVectorImpl<Decl *> &Decls) override;
119 /// Gives the external AST source an opportunity to complete
120 /// an incomplete type.
121 void CompleteType(TagDecl *Tag) override;
123 /// Gives the external AST source an opportunity to complete an
124 /// incomplete Objective-C class.
126 /// This routine will only be invoked if the "externally completed" bit is
127 /// set on the ObjCInterfaceDecl via the function
128 /// \c ObjCInterfaceDecl::setExternallyCompleted().
129 void CompleteType(ObjCInterfaceDecl *Class) override;
131 /// Loads comment ranges.
132 void ReadComments() override;
134 /// Notify ExternalASTSource that we started deserialization of
135 /// a decl or type so until FinishedDeserializing is called there may be
136 /// decls that are initializing. Must be paired with FinishedDeserializing.
137 void StartedDeserializing() override;
139 /// Notify ExternalASTSource that we finished the deserialization of
140 /// a decl or type. Must be paired with StartedDeserializing.
141 void FinishedDeserializing() override;
143 /// Function that will be invoked when we begin parsing a new
144 /// translation unit involving this external AST source.
145 void StartTranslationUnit(ASTConsumer *Consumer) override;
147 /// Print any statistics that have been gathered regarding
148 /// the external AST source.
149 void PrintStats() override;
151 /// Retrieve the module that corresponds to the given module ID.
152 Module *getModule(unsigned ID) override;
154 bool DeclIsFromPCHWithObjectFile(const Decl *D) override;
156 /// Perform layout on the given record.
158 /// This routine allows the external AST source to provide an specific
159 /// layout for a record, overriding the layout that would normally be
160 /// constructed. It is intended for clients who receive specific layout
161 /// details rather than source code (such as LLDB). The client is expected
162 /// to fill in the field offsets, base offsets, virtual base offsets, and
163 /// complete object size.
165 /// \param Record The record whose layout is being requested.
167 /// \param Size The final size of the record, in bits.
169 /// \param Alignment The final alignment of the record, in bits.
171 /// \param FieldOffsets The offset of each of the fields within the record,
172 /// expressed in bits. All of the fields must be provided with offsets.
174 /// \param BaseOffsets The offset of each of the direct, non-virtual base
175 /// classes. If any bases are not given offsets, the bases will be laid
176 /// out according to the ABI.
178 /// \param VirtualBaseOffsets The offset of each of the virtual base classes
179 /// (either direct or not). If any bases are not given offsets, the bases will
180 /// be laid out according to the ABI.
182 /// \returns true if the record layout was provided, false otherwise.
184 layoutRecordType(const RecordDecl *Record,
185 uint64_t &Size, uint64_t &Alignment,
186 llvm::DenseMap<const FieldDecl *, uint64_t> &FieldOffsets,
187 llvm::DenseMap<const CXXRecordDecl *, CharUnits> &BaseOffsets,
188 llvm::DenseMap<const CXXRecordDecl *,
189 CharUnits> &VirtualBaseOffsets) override;
191 /// Return the amount of memory used by memory buffers, breaking down
192 /// by heap-backed versus mmap'ed memory.
193 void getMemoryBufferSizes(MemoryBufferSizes &sizes) const override;
195 //===--------------------------------------------------------------------===//
196 // ExternalSemaSource.
197 //===--------------------------------------------------------------------===//
199 /// Initialize the semantic source with the Sema instance
200 /// being used to perform semantic analysis on the abstract syntax
202 void InitializeSema(Sema &S) override;
204 /// Inform the semantic consumer that Sema is no longer available.
205 void ForgetSema() override;
207 /// Load the contents of the global method pool for a given
209 void ReadMethodPool(Selector Sel) override;
211 /// Load the contents of the global method pool for a given
212 /// selector if necessary.
213 void updateOutOfDateSelector(Selector Sel) override;
215 /// Load the set of namespaces that are known to the external source,
216 /// which will be used during typo correction.
218 ReadKnownNamespaces(SmallVectorImpl<NamespaceDecl*> &Namespaces) override;
220 /// Load the set of used but not defined functions or variables with
221 /// internal linkage, or used but not defined inline functions.
222 void ReadUndefinedButUsed(
223 llvm::MapVector<NamedDecl *, SourceLocation> &Undefined) override;
225 void ReadMismatchingDeleteExpressions(llvm::MapVector<
226 FieldDecl *, llvm::SmallVector<std::pair<SourceLocation, bool>, 4>> &
229 /// 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 /// 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 /// 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 /// 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 /// 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 /// Read the set of potentially unused typedefs known to the source.
279 /// The external source should append its own potentially unused local
280 /// typedefs to the given vector of declarations. Note that this routine may
281 /// be invoked multiple times; the external source should take care not to
282 /// introduce the same declarations repeatedly.
283 void ReadUnusedLocalTypedefNameCandidates(
284 llvm::SmallSetVector<const TypedefNameDecl *, 4> &Decls) override;
286 /// Read the set of referenced selectors known to the
287 /// external Sema source.
289 /// The external source should append its own referenced selectors to the
290 /// given vector of selectors. Note that this routine
291 /// may be invoked multiple times; the external source should take care not
292 /// to introduce the same selectors repeatedly.
293 void ReadReferencedSelectors(SmallVectorImpl<std::pair<Selector,
294 SourceLocation> > &Sels) override;
296 /// Read the set of weak, undeclared identifiers known to the
297 /// external Sema source.
299 /// The external source should append its own weak, undeclared identifiers to
300 /// the given vector. Note that this routine may be invoked multiple times;
301 /// the external source should take care not to introduce the same identifiers
303 void ReadWeakUndeclaredIdentifiers(
304 SmallVectorImpl<std::pair<IdentifierInfo*, WeakInfo> > &WI) override;
306 /// Read the set of used vtables known to the external Sema source.
308 /// The external source should append its own used vtables to the given
309 /// vector. Note that this routine may be invoked multiple times; the external
310 /// source should take care not to introduce the same vtables repeatedly.
311 void ReadUsedVTables(SmallVectorImpl<ExternalVTableUse> &VTables) override;
313 /// Read the set of pending instantiations known to the external
316 /// The external source should append its own pending instantiations to the
317 /// given vector. Note that this routine may be invoked multiple times; the
318 /// external source should take care not to introduce the same instantiations
320 void ReadPendingInstantiations(
321 SmallVectorImpl<std::pair<ValueDecl*, SourceLocation> >& Pending) override;
323 /// Read the set of late parsed template functions for this source.
325 /// The external source should insert its own late parsed template functions
326 /// into the map. Note that this routine may be invoked multiple times; the
327 /// external source should take care not to introduce the same map entries
329 void ReadLateParsedTemplates(
330 llvm::MapVector<const FunctionDecl *, std::unique_ptr<LateParsedTemplate>>
333 /// \copydoc ExternalSemaSource::CorrectTypo
334 /// \note Returns the first nonempty correction.
335 TypoCorrection CorrectTypo(const DeclarationNameInfo &Typo,
336 int LookupKind, Scope *S, CXXScopeSpec *SS,
337 CorrectionCandidateCallback &CCC,
338 DeclContext *MemberContext,
339 bool EnteringContext,
340 const ObjCObjectPointerType *OPT) override;
342 /// Produces a diagnostic note if one of the attached sources
343 /// contains a complete definition for \p T. Queries the sources in list
344 /// order until the first one claims that a diagnostic was produced.
346 /// \param Loc the location at which a complete type was required but not
349 /// \param T the \c QualType that should have been complete at \p Loc
351 /// \return true if a diagnostic was produced, false otherwise.
352 bool MaybeDiagnoseMissingCompleteType(SourceLocation Loc,
353 QualType T) override;
355 // isa/cast/dyn_cast support
356 static bool classof(const MultiplexExternalSemaSource*) { return true; }
357 //static bool classof(const ExternalSemaSource*) { return true; }
360 } // end namespace clang