//===----------------------------------------------------------------------===//
//
// This file defines the ExternalASTSource interface, which enables
-// construction of AST nodes from some external source.x
+// construction of AST nodes from some external source.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_CLANG_AST_EXTERNAL_AST_SOURCE_H
#include "clang/AST/DeclBase.h"
#include <cassert>
-#include <vector>
namespace llvm {
template <class T> class SmallVectorImpl;
class ASTConsumer;
class CXXBaseSpecifier;
-class Decl;
-class DeclContext;
-class DeclContextLookupResult;
class DeclarationName;
class ExternalSemaSource; // layering violation required for downcasting
class NamedDecl;
///
/// This method only needs to be implemented if the AST source ever
/// passes back decl sets as VisibleDeclaration objects.
- virtual Decl *GetExternalDecl(uint32_t ID) = 0;
+ ///
+ /// The default implementation of this method is a no-op.
+ virtual Decl *GetExternalDecl(uint32_t ID);
/// \brief Resolve a selector ID into a selector.
///
/// This operation only needs to be implemented if the AST source
/// returns non-zero for GetNumKnownSelectors().
- virtual Selector GetExternalSelector(uint32_t ID) = 0;
+ ///
+ /// The default implementation of this method is a no-op.
+ virtual Selector GetExternalSelector(uint32_t ID);
/// \brief Returns the number of selectors known to the external AST
/// source.
- virtual uint32_t GetNumExternalSelectors() = 0;
+ ///
+ /// The default implementation of this method is a no-op.
+ virtual uint32_t GetNumExternalSelectors();
/// \brief Resolve the offset of a statement in the decl stream into
/// a statement.
/// This operation is meant to be used via a LazyOffsetPtr. It only
/// needs to be implemented if the AST source uses methods like
/// FunctionDecl::setLazyBody when building decls.
- virtual Stmt *GetExternalDeclStmt(uint64_t Offset) = 0;
+ ///
+ /// The default implementation of this method is a no-op.
+ virtual Stmt *GetExternalDeclStmt(uint64_t Offset);
/// \brief Resolve the offset of a set of C++ base specifiers in the decl
/// stream into an array of specifiers.
- virtual CXXBaseSpecifier *GetExternalCXXBaseSpecifiers(uint64_t Offset) = 0;
-
+ ///
+ /// The default implementation of this method is a no-op.
+ virtual CXXBaseSpecifier *GetExternalCXXBaseSpecifiers(uint64_t Offset);
+
/// \brief Finds all declarations with the given name in the
/// given context.
///
/// Generally the final step of this method is either to call
/// SetExternalVisibleDeclsForName or to recursively call lookup on
/// the DeclContext after calling SetExternalVisibleDecls.
+ ///
+ /// The default implementation of this method is a no-op.
virtual DeclContextLookupResult
- FindExternalVisibleDeclsByName(const DeclContext *DC,
- DeclarationName Name) = 0;
+ FindExternalVisibleDeclsByName(const DeclContext *DC, DeclarationName Name);
/// \brief Deserialize all the visible declarations from external storage.
///
/// may not have a complete name lookup table. This function deserializes
/// the rest of visible declarations from the external storage and completes
/// the name lookup table of the DeclContext.
- virtual void MaterializeVisibleDecls(const DeclContext *DC) = 0;
+ ///
+ /// The default implementation of this method is a no-op.
+ virtual void MaterializeVisibleDecls(const DeclContext *DC);
/// \brief Finds all declarations lexically contained within the given
/// DeclContext, after applying an optional filter predicate.
/// are returned.
///
/// \return true if an error occurred
+ ///
+ /// The default implementation of this method is a no-op.
virtual bool FindExternalLexicalDecls(const DeclContext *DC,
bool (*isKindWeWant)(Decl::Kind),
- llvm::SmallVectorImpl<Decl*> &Result) = 0;
+ llvm::SmallVectorImpl<Decl*> &Result);
/// \brief Finds all declarations lexically contained within the given
/// DeclContext.
/// set on the ObjCInterfaceDecl via the function
/// \c ObjCInterfaceDecl::setExternallyCompleted().
virtual void CompleteType(ObjCInterfaceDecl *Class) { }
-
+
/// \brief Notify ExternalASTSource that we started deserialization of
/// a decl or type so until FinishedDeserializing is called there may be
/// decls that are initializing. Must be paired with FinishedDeserializing.
typedef LazyOffsetPtr<CXXBaseSpecifier, uint64_t,
&ExternalASTSource::GetExternalCXXBaseSpecifiers>
LazyCXXBaseSpecifiersPtr;
-
+
} // end namespace clang
#endif // LLVM_CLANG_AST_EXTERNAL_AST_SOURCE_H
--- /dev/null
+//===- ExternalASTSource.cpp - Abstract External AST Interface --*- C++ -*-===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file provides the default implementation of the ExternalASTSource
+// interface, which enables construction of AST nodes from some external
+// source.
+//
+//===----------------------------------------------------------------------===//
+
+#include "clang/AST/ExternalASTSource.h"
+#include "clang/AST/DeclarationName.h"
+
+using namespace clang;
+
+ExternalASTSource::~ExternalASTSource() { }
+
+void ExternalASTSource::PrintStats() { }
+
+Decl *ExternalASTSource::GetExternalDecl(uint32_t ID) {
+ return 0;
+}
+
+Selector ExternalASTSource::GetExternalSelector(uint32_t ID) {
+ return Selector();
+}
+
+uint32_t ExternalASTSource::GetNumExternalSelectors() {
+ return 0;
+}
+
+Stmt *ExternalASTSource::GetExternalDeclStmt(uint64_t Offset) {
+ return 0;
+}
+
+CXXBaseSpecifier *
+ExternalASTSource::GetExternalCXXBaseSpecifiers(uint64_t Offset) {
+ return 0;
+}
+
+DeclContextLookupResult
+ExternalASTSource::FindExternalVisibleDeclsByName(const DeclContext *DC,
+ DeclarationName Name) {
+ return DeclContext::lookup_result();
+}
+
+void ExternalASTSource::MaterializeVisibleDecls(const DeclContext *DC) { }
+
+bool
+ExternalASTSource::FindExternalLexicalDecls(const DeclContext *DC,
+ bool (*isKindWeWant)(Decl::Kind),
+ llvm::SmallVectorImpl<Decl*> &Result) {
+ return true;
+}