83 lines
2.7 KiB
C++
83 lines
2.7 KiB
C++
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//===- unittest/AST/ExternalASTSourceTest.cpp -----------------------------===//
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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 contains tests for Clang's ExternalASTSource.
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//
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//===----------------------------------------------------------------------===//
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#include "clang/AST/ASTConsumer.h"
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#include "clang/AST/ASTContext.h"
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#include "clang/AST/ExternalASTSource.h"
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#include "clang/Frontend/CompilerInstance.h"
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#include "clang/Frontend/CompilerInvocation.h"
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#include "clang/Frontend/FrontendActions.h"
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#include "clang/Lex/PreprocessorOptions.h"
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#include "gtest/gtest.h"
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using namespace clang;
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using namespace llvm;
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class TestFrontendAction : public ASTFrontendAction {
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public:
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TestFrontendAction(ExternalASTSource *Source) : Source(Source) {}
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private:
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void ExecuteAction() override {
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getCompilerInstance().getASTContext().setExternalSource(Source);
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getCompilerInstance().getASTContext().getTranslationUnitDecl()
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->setHasExternalVisibleStorage();
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return ASTFrontendAction::ExecuteAction();
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}
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std::unique_ptr<ASTConsumer> CreateASTConsumer(CompilerInstance &CI,
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StringRef InFile) override {
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return std::make_unique<ASTConsumer>();
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}
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IntrusiveRefCntPtr<ExternalASTSource> Source;
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};
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bool testExternalASTSource(ExternalASTSource *Source,
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StringRef FileContents) {
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CompilerInstance Compiler;
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Compiler.createDiagnostics();
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auto Invocation = std::make_shared<CompilerInvocation>();
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Invocation->getPreprocessorOpts().addRemappedFile(
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"test.cc", MemoryBuffer::getMemBuffer(FileContents).release());
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const char *Args[] = { "test.cc" };
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CompilerInvocation::CreateFromArgs(*Invocation, Args,
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Compiler.getDiagnostics());
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Compiler.setInvocation(std::move(Invocation));
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TestFrontendAction Action(Source);
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return Compiler.ExecuteAction(Action);
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}
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// Ensure that a failed name lookup into an external source only occurs once.
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TEST(ExternalASTSourceTest, FailedLookupOccursOnce) {
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struct TestSource : ExternalASTSource {
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TestSource(unsigned &Calls) : Calls(Calls) {}
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bool FindExternalVisibleDeclsByName(const DeclContext *,
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DeclarationName Name) override {
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if (Name.getAsString() == "j")
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++Calls;
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return false;
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}
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unsigned &Calls;
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};
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unsigned Calls = 0;
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ASSERT_TRUE(testExternalASTSource(new TestSource(Calls), "int j, k = j;"));
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EXPECT_EQ(1u, Calls);
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}
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