forked from OSchip/llvm-project
128 lines
3.8 KiB
C++
128 lines
3.8 KiB
C++
//===- ExternalASTSource.cpp - Abstract External AST Interface ------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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//
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// This file provides the default implementation of the ExternalASTSource
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// interface, which enables construction of AST nodes from some external
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// source.
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//
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//===----------------------------------------------------------------------===//
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#include "clang/AST/ExternalASTSource.h"
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#include "clang/AST/ASTContext.h"
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#include "clang/AST/DeclarationName.h"
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#include "clang/Basic/FileManager.h"
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#include "clang/Basic/IdentifierTable.h"
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#include "clang/Basic/LLVM.h"
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#include "clang/Basic/Module.h"
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#include "clang/Basic/SourceManager.h"
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#include "llvm/ADT/None.h"
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#include "llvm/Support/ErrorHandling.h"
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#include <cstdint>
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using namespace clang;
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char ExternalASTSource::ID;
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ExternalASTSource::~ExternalASTSource() = default;
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llvm::Optional<ASTSourceDescriptor>
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ExternalASTSource::getSourceDescriptor(unsigned ID) {
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return None;
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}
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ExternalASTSource::ExtKind
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ExternalASTSource::hasExternalDefinitions(const Decl *D) {
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return EK_ReplyHazy;
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}
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void ExternalASTSource::FindFileRegionDecls(FileID File, unsigned Offset,
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unsigned Length,
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SmallVectorImpl<Decl *> &Decls) {}
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void ExternalASTSource::CompleteRedeclChain(const Decl *D) {}
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void ExternalASTSource::CompleteType(TagDecl *Tag) {}
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void ExternalASTSource::CompleteType(ObjCInterfaceDecl *Class) {}
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void ExternalASTSource::ReadComments() {}
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void ExternalASTSource::StartedDeserializing() {}
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void ExternalASTSource::FinishedDeserializing() {}
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void ExternalASTSource::StartTranslationUnit(ASTConsumer *Consumer) {}
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void ExternalASTSource::PrintStats() {}
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bool ExternalASTSource::layoutRecordType(
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const RecordDecl *Record, uint64_t &Size, uint64_t &Alignment,
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llvm::DenseMap<const FieldDecl *, uint64_t> &FieldOffsets,
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llvm::DenseMap<const CXXRecordDecl *, CharUnits> &BaseOffsets,
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llvm::DenseMap<const CXXRecordDecl *, CharUnits> &VirtualBaseOffsets) {
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return false;
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}
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Decl *ExternalASTSource::GetExternalDecl(uint32_t ID) {
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return nullptr;
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}
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Selector ExternalASTSource::GetExternalSelector(uint32_t ID) {
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return Selector();
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}
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uint32_t ExternalASTSource::GetNumExternalSelectors() {
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return 0;
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}
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Stmt *ExternalASTSource::GetExternalDeclStmt(uint64_t Offset) {
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return nullptr;
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}
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CXXCtorInitializer **
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ExternalASTSource::GetExternalCXXCtorInitializers(uint64_t Offset) {
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return nullptr;
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}
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CXXBaseSpecifier *
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ExternalASTSource::GetExternalCXXBaseSpecifiers(uint64_t Offset) {
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return nullptr;
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}
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bool
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ExternalASTSource::FindExternalVisibleDeclsByName(const DeclContext *DC,
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DeclarationName Name) {
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return false;
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}
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void ExternalASTSource::completeVisibleDeclsMap(const DeclContext *DC) {}
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void ExternalASTSource::FindExternalLexicalDecls(
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const DeclContext *DC, llvm::function_ref<bool(Decl::Kind)> IsKindWeWant,
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SmallVectorImpl<Decl *> &Result) {}
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void ExternalASTSource::getMemoryBufferSizes(MemoryBufferSizes &sizes) const {}
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uint32_t ExternalASTSource::incrementGeneration(ASTContext &C) {
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uint32_t OldGeneration = CurrentGeneration;
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// Make sure the generation of the topmost external source for the context is
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// incremented. That might not be us.
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auto *P = C.getExternalSource();
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if (P && P != this)
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CurrentGeneration = P->incrementGeneration(C);
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else {
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// FIXME: Only bump the generation counter if the current generation number
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// has been observed?
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if (!++CurrentGeneration)
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llvm::report_fatal_error("generation counter overflowed", false);
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}
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return OldGeneration;
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}
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