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//===- unittests/Frontend/ASTUnitTest.cpp - ASTUnit tests -----------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include <fstream>
#include "clang/Frontend/ASTUnit.h"
#include "clang/Frontend/CompilerInstance.h"
#include "clang/Frontend/CompilerInvocation.h"
#include "clang/Frontend/PCHContainerOperations.h"
#include "llvm/Support/FileSystem.h"
#include "llvm/Support/Path.h"
#include "llvm/Support/ToolOutputFile.h"
#include "gtest/gtest.h"
using namespace llvm;
using namespace clang;
namespace {
TEST(ASTUnit, SaveLoadPreservesLangOptionsInPrintingPolicy) {
// Check that the printing policy is restored with the correct language
// options when loading an ASTUnit from a file. To this end, an ASTUnit
// for a C++ translation unit is set up and written to a temporary file.
// By default `UseVoidForZeroParams` is true for non-C++ language options,
// thus we can check this field after loading the ASTUnit to deduce whether
// the correct (C++) language options were used when setting up the printing
// policy.
{
PrintingPolicy PolicyWithDefaultLangOpt(LangOptions{});
EXPECT_TRUE(PolicyWithDefaultLangOpt.UseVoidForZeroParams);
}
int FD;
llvm::SmallString<256> InputFileName;
ASSERT_FALSE(llvm::sys::fs::createTemporaryFile("ast-unit", "cpp", FD, InputFileName));
ToolOutputFile input_file(InputFileName, FD);
input_file.os() << "";
const char* Args[] = {"clang", "-xc++", InputFileName.c_str()};
IntrusiveRefCntPtr<DiagnosticsEngine> Diags =
CompilerInstance::createDiagnostics(new DiagnosticOptions());
std::shared_ptr<CompilerInvocation> CInvok =
createInvocationFromCommandLine(Args, Diags);
if (!CInvok)
FAIL() << "could not create compiler invocation";
FileManager *FileMgr =
new FileManager(FileSystemOptions(), vfs::getRealFileSystem());
auto PCHContainerOps = std::make_shared<PCHContainerOperations>();
std::unique_ptr<ASTUnit> AST = ASTUnit::LoadFromCompilerInvocation(
CInvok, PCHContainerOps, Diags, FileMgr);
if (!AST)
FAIL() << "failed to create ASTUnit";
EXPECT_FALSE(AST->getASTContext().getPrintingPolicy().UseVoidForZeroParams);
llvm::SmallString<256> ASTFileName;
ASSERT_FALSE(llvm::sys::fs::createTemporaryFile("ast-unit", "ast", FD, ASTFileName));
ToolOutputFile ast_file(ASTFileName, FD);
AST->Save(ASTFileName.str());
EXPECT_TRUE(llvm::sys::fs::exists(ASTFileName));
std::unique_ptr<ASTUnit> AU = ASTUnit::LoadFromASTFile(
ASTFileName.str(), PCHContainerOps->getRawReader(), ASTUnit::LoadEverything, Diags,
FileSystemOptions(), /*UseDebugInfo=*/false);
if (!AU)
FAIL() << "failed to load ASTUnit";
EXPECT_FALSE(AU->getASTContext().getPrintingPolicy().UseVoidForZeroParams);
}
} // anonymous namespace
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