clang  3.9.0
ExternalASTSource.cpp
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1 //===- ExternalASTSource.cpp - Abstract External AST Interface --*- 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 provides the default implementation of the ExternalASTSource
11 // interface, which enables construction of AST nodes from some external
12 // source.
13 //
14 //===----------------------------------------------------------------------===//
15 
17 #include "clang/AST/ASTContext.h"
19 #include "clang/Basic/Module.h"
20 #include "llvm/Support/ErrorHandling.h"
21 
22 using namespace clang;
23 
25 
28  return None;
29 }
30 
32  : Signature(M.Signature), ClangModule(&M) {
33  if (M.Directory)
34  Path = M.Directory->getName();
35  if (auto *File = M.getASTFile())
36  ASTFile = File->getName();
37 }
38 
40  if (ClangModule)
41  return ClangModule->Name;
42  else
43  return PCHModuleName;
44 }
45 
47  unsigned Length,
48  SmallVectorImpl<Decl *> &Decls) {}
49 
51 
53 
55 
57 
59 
61 
63 
65 
67  const RecordDecl *Record, uint64_t &Size, uint64_t &Alignment,
68  llvm::DenseMap<const FieldDecl *, uint64_t> &FieldOffsets,
69  llvm::DenseMap<const CXXRecordDecl *, CharUnits> &BaseOffsets,
70  llvm::DenseMap<const CXXRecordDecl *, CharUnits> &VirtualBaseOffsets) {
71  return false;
72 }
73 
75  return nullptr;
76 }
77 
79  return Selector();
80 }
81 
83  return 0;
84 }
85 
87  return nullptr;
88 }
89 
92  return nullptr;
93 }
94 
97  return nullptr;
98 }
99 
100 bool
103  return false;
104 }
105 
107 
109  const DeclContext *DC, llvm::function_ref<bool(Decl::Kind)> IsKindWeWant,
111 
113 
115  uint32_t OldGeneration = CurrentGeneration;
116 
117  // Make sure the generation of the topmost external source for the context is
118  // incremented. That might not be us.
119  auto *P = C.getExternalSource();
120  if (P && P != this)
121  CurrentGeneration = P->incrementGeneration(C);
122  else {
123  // FIXME: Only bump the generation counter if the current generation number
124  // has been observed?
125  if (!++CurrentGeneration)
126  llvm::report_fatal_error("generation counter overflowed", false);
127  }
128 
129  return OldGeneration;
130 }
virtual void FindExternalLexicalDecls(const DeclContext *DC, llvm::function_ref< bool(Decl::Kind)> IsKindWeWant, SmallVectorImpl< Decl * > &Result)
Finds all declarations lexically contained within the given DeclContext, after applying an optional f...
Defines the clang::ASTContext interface.
Smart pointer class that efficiently represents Objective-C method names.
unsigned Length
virtual Decl * GetExternalDecl(uint32_t ID)
Resolve a declaration ID into a declaration, potentially building a new declaration.
ASTConsumer - This is an abstract interface that should be implemented by clients that read ASTs...
Definition: ASTConsumer.h:36
Defines the clang::Module class, which describes a module in the source code.
StringRef P
virtual uint32_t GetNumExternalSelectors()
Returns the number of selectors known to the external AST source.
virtual bool layoutRecordType(const RecordDecl *Record, uint64_t &Size, uint64_t &Alignment, llvm::DenseMap< const FieldDecl *, uint64_t > &FieldOffsets, llvm::DenseMap< const CXXRecordDecl *, CharUnits > &BaseOffsets, llvm::DenseMap< const CXXRecordDecl *, CharUnits > &VirtualBaseOffsets)
Perform layout on the given record.
virtual void PrintStats()
Print any statistics that have been gathered regarding the external AST source.
const FileEntry * getASTFile() const
The serialized AST file for this module, if one was created.
Definition: Basic/Module.h:384
virtual void CompleteRedeclChain(const Decl *D)
Gives the external AST source an opportunity to complete the redeclaration chain for a declaration...
virtual Selector GetExternalSelector(uint32_t ID)
Resolve a selector ID into a selector.
virtual void StartedDeserializing()
Notify ExternalASTSource that we started deserialization of a decl or type so until FinishedDeseriali...
MemoryBufferSizes getMemoryBufferSizes() const
Return the amount of memory used by memory buffers, breaking down by heap-backed versus mmap'ed memor...
RecordDecl - Represents a struct/union/class.
Definition: Decl.h:3253
class LLVM_ALIGNAS(8) DependentTemplateSpecializationType const IdentifierInfo * Name
Represents a template specialization type whose template cannot be resolved, e.g. ...
Definition: Type.h:4549
Holds long-lived AST nodes (such as types and decls) that can be referred to throughout the semantic ...
Definition: ASTContext.h:92
uint32_t incrementGeneration(ASTContext &C)
Increment the current generation.
virtual CXXBaseSpecifier * GetExternalCXXBaseSpecifiers(uint64_t Offset)
Resolve the offset of a set of C++ base specifiers in the decl stream into an array of specifiers...
Describes a module or submodule.
Definition: Basic/Module.h:47
virtual void FindFileRegionDecls(FileID File, unsigned Offset, unsigned Length, SmallVectorImpl< Decl * > &Decls)
Get the decls that are contained in a file in the Offset/Length range.
virtual bool FindExternalVisibleDeclsByName(const DeclContext *DC, DeclarationName Name)
Find all declarations with the given name in the given context, and add them to the context by callin...
uint32_t Offset
Definition: CacheTokens.cpp:44
virtual void FinishedDeserializing()
Notify ExternalASTSource that we finished the deserialization of a decl or type.
Represents an ObjC class declaration.
Definition: DeclObjC.h:1091
virtual void completeVisibleDeclsMap(const DeclContext *DC)
Ensures that the table of all visible declarations inside this context is up to date.
The result type of a method or function.
const DirectoryEntry * Directory
The build directory of this module.
Definition: Basic/Module.h:62
Kind
ExternalASTSource * getExternalSource() const
Retrieve a pointer to the external AST source associated with this AST context, if any...
Definition: ASTContext.h:943
virtual Stmt * GetExternalDeclStmt(uint64_t Offset)
Resolve the offset of a statement in the decl stream into a statement.
const std::string ID
TagDecl - Represents the declaration of a struct/union/class/enum.
Definition: Decl.h:2727
const char * getName() const
Definition: FileManager.h:45
An opaque identifier used by SourceManager which refers to a source file (MemoryBuffer) along with it...
DeclContext - This is used only as base class of specific decl types that can act as declaration cont...
Definition: DeclBase.h:1135
virtual void StartTranslationUnit(ASTConsumer *Consumer)
Function that will be invoked when we begin parsing a new translation unit involving this external AS...
virtual void ReadComments()
Loads comment ranges.
DeclarationName - The name of a declaration.
virtual CXXCtorInitializer ** GetExternalCXXCtorInitializers(uint64_t Offset)
Resolve the offset of a set of C++ constructor initializers in the decl stream into an array of initi...
Represents a C++ base or member initializer.
Definition: DeclCXX.h:1922
virtual void CompleteType(TagDecl *Tag)
Gives the external AST source an opportunity to complete an incomplete type.
Represents a base class of a C++ class.
Definition: DeclCXX.h:159
virtual llvm::Optional< ASTSourceDescriptor > getSourceDescriptor(unsigned ID)
Return a descriptor for the corresponding module, if one exists.