forked from OSchip/llvm-project
83 lines
2.7 KiB
C++
83 lines
2.7 KiB
C++
//===- unittest/AST/ExternalASTSourceTest.cpp -----------------------------===//
|
|
//
|
|
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
|
|
// See https://llvm.org/LICENSE.txt for license information.
|
|
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// This file contains tests for Clang's ExternalASTSource.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include "clang/AST/ASTConsumer.h"
|
|
#include "clang/AST/ASTContext.h"
|
|
#include "clang/AST/ExternalASTSource.h"
|
|
#include "clang/Frontend/CompilerInstance.h"
|
|
#include "clang/Frontend/CompilerInvocation.h"
|
|
#include "clang/Frontend/FrontendActions.h"
|
|
#include "clang/Lex/PreprocessorOptions.h"
|
|
#include "gtest/gtest.h"
|
|
|
|
using namespace clang;
|
|
using namespace llvm;
|
|
|
|
|
|
class TestFrontendAction : public ASTFrontendAction {
|
|
public:
|
|
TestFrontendAction(ExternalASTSource *Source) : Source(Source) {}
|
|
|
|
private:
|
|
void ExecuteAction() override {
|
|
getCompilerInstance().getASTContext().setExternalSource(Source);
|
|
getCompilerInstance().getASTContext().getTranslationUnitDecl()
|
|
->setHasExternalVisibleStorage();
|
|
return ASTFrontendAction::ExecuteAction();
|
|
}
|
|
|
|
std::unique_ptr<ASTConsumer> CreateASTConsumer(CompilerInstance &CI,
|
|
StringRef InFile) override {
|
|
return std::make_unique<ASTConsumer>();
|
|
}
|
|
|
|
IntrusiveRefCntPtr<ExternalASTSource> Source;
|
|
};
|
|
|
|
bool testExternalASTSource(ExternalASTSource *Source,
|
|
StringRef FileContents) {
|
|
CompilerInstance Compiler;
|
|
Compiler.createDiagnostics();
|
|
|
|
auto Invocation = std::make_shared<CompilerInvocation>();
|
|
Invocation->getPreprocessorOpts().addRemappedFile(
|
|
"test.cc", MemoryBuffer::getMemBuffer(FileContents).release());
|
|
const char *Args[] = { "test.cc" };
|
|
CompilerInvocation::CreateFromArgs(*Invocation, Args,
|
|
Compiler.getDiagnostics());
|
|
Compiler.setInvocation(std::move(Invocation));
|
|
|
|
TestFrontendAction Action(Source);
|
|
return Compiler.ExecuteAction(Action);
|
|
}
|
|
|
|
|
|
// Ensure that a failed name lookup into an external source only occurs once.
|
|
TEST(ExternalASTSourceTest, FailedLookupOccursOnce) {
|
|
struct TestSource : ExternalASTSource {
|
|
TestSource(unsigned &Calls) : Calls(Calls) {}
|
|
|
|
bool FindExternalVisibleDeclsByName(const DeclContext *,
|
|
DeclarationName Name) override {
|
|
if (Name.getAsString() == "j")
|
|
++Calls;
|
|
return false;
|
|
}
|
|
|
|
unsigned &Calls;
|
|
};
|
|
|
|
unsigned Calls = 0;
|
|
ASSERT_TRUE(testExternalASTSource(new TestSource(Calls), "int j, k = j;"));
|
|
EXPECT_EQ(1u, Calls);
|
|
}
|