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//== unittests/Sema/SemaNoloadLookupTest.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
//
//===----------------------------------------------------------------------===//
#include "clang/AST/DeclLookups.h"
#include "clang/AST/DeclarationName.h"
#include "clang/ASTMatchers/ASTMatchFinder.h"
#include "clang/ASTMatchers/ASTMatchers.h"
#include "clang/Frontend/CompilerInstance.h"
#include "clang/Frontend/FrontendAction.h"
#include "clang/Frontend/FrontendActions.h"
#include "clang/Parse/ParseAST.h"
#include "clang/Sema/Lookup.h"
#include "clang/Sema/Sema.h"
#include "clang/Sema/SemaConsumer.h"
#include "clang/Tooling/Tooling.h"
#include "gtest/gtest.h"
using namespace llvm;
using namespace clang;
using namespace clang::tooling;
namespace {
class NoloadLookupTest : public ::testing::Test {
void SetUp() override {
ASSERT_FALSE(
sys::fs::createUniqueDirectory("modules-no-comments-test", TestDir));
}
void TearDown() override { sys::fs::remove_directories(TestDir); }
public:
SmallString<256> TestDir;
void addFile(StringRef Path, StringRef Contents) {
ASSERT_FALSE(sys::path::is_absolute(Path));
SmallString<256> AbsPath(TestDir);
sys::path::append(AbsPath, Path);
ASSERT_FALSE(
sys::fs::create_directories(llvm::sys::path::parent_path(AbsPath)));
std::error_code EC;
llvm::raw_fd_ostream OS(AbsPath, EC);
ASSERT_FALSE(EC);
OS << Contents;
}
std::string GenerateModuleInterface(StringRef ModuleName,
StringRef Contents) {
std::string FileName = llvm::Twine(ModuleName + ".cppm").str();
addFile(FileName, Contents);
IntrusiveRefCntPtr<DiagnosticsEngine> Diags =
CompilerInstance::createDiagnostics(new DiagnosticOptions());
CreateInvocationOptions CIOpts;
CIOpts.Diags = Diags;
CIOpts.VFS = llvm::vfs::createPhysicalFileSystem();
std::string CacheBMIPath =
llvm::Twine(TestDir + "/" + ModuleName + ".pcm").str();
std::string PrebuiltModulePath =
"-fprebuilt-module-path=" + TestDir.str().str();
const char *Args[] = {"clang++",
"-std=c++20",
"--precompile",
PrebuiltModulePath.c_str(),
"-working-directory",
TestDir.c_str(),
"-I",
TestDir.c_str(),
FileName.c_str()};
std::shared_ptr<CompilerInvocation> Invocation =
createInvocation(Args, CIOpts);
EXPECT_TRUE(Invocation);
CompilerInstance Instance;
Instance.setDiagnostics(Diags.get());
Instance.setInvocation(Invocation);
Instance.getFrontendOpts().OutputFile = CacheBMIPath;
GenerateReducedModuleInterfaceAction Action;
EXPECT_TRUE(Instance.ExecuteAction(Action));
EXPECT_FALSE(Diags->hasErrorOccurred());
return CacheBMIPath;
}
};
struct TrivialVisibleDeclConsumer : public VisibleDeclConsumer {
TrivialVisibleDeclConsumer() {}
void EnteredContext(DeclContext *Ctx) override {}
void FoundDecl(NamedDecl *ND, NamedDecl *Hiding, DeclContext *Ctx,
bool InBaseClass) override {
FoundNum++;
}
int FoundNum = 0;
};
class NoloadLookupConsumer : public SemaConsumer {
public:
void InitializeSema(Sema &S) override { SemaPtr = &S; }
bool HandleTopLevelDecl(DeclGroupRef D) override {
if (!D.isSingleDecl())
return true;
Decl *TD = D.getSingleDecl();
auto *ID = dyn_cast<ImportDecl>(TD);
if (!ID)
return true;
clang::Module *M = ID->getImportedModule();
assert(M);
if (M->Name != "R")
return true;
auto *Std = SemaPtr->getStdNamespace();
EXPECT_TRUE(Std);
TrivialVisibleDeclConsumer Consumer;
SemaPtr->LookupVisibleDecls(Std, Sema::LookupNameKind::LookupOrdinaryName,
Consumer,
/*IncludeGlobalScope=*/true,
/*IncludeDependentBases=*/false,
/*LoadExternal=*/false);
EXPECT_EQ(Consumer.FoundNum, 1);
return true;
}
private:
Sema *SemaPtr = nullptr;
};
class NoloadLookupAction : public ASTFrontendAction {
std::unique_ptr<ASTConsumer>
CreateASTConsumer(CompilerInstance &CI, StringRef /*Unused*/) override {
return std::make_unique<NoloadLookupConsumer>();
}
};
TEST_F(NoloadLookupTest, NonModulesTest) {
GenerateModuleInterface("M", R"cpp(
module;
namespace std {
int What();
void bar(int x = What()) {
}
}
export module M;
export using std::bar;
)cpp");
GenerateModuleInterface("R", R"cpp(
module;
namespace std {
class Another;
int What(Another);
int What();
}
export module R;
)cpp");
const char *test_file_contents = R"cpp(
import M;
namespace std {
void use() {
bar();
}
}
import R;
)cpp";
std::string DepArg = "-fprebuilt-module-path=" + TestDir.str().str();
EXPECT_TRUE(runToolOnCodeWithArgs(std::make_unique<NoloadLookupAction>(),
test_file_contents,
{
"-std=c++20",
DepArg.c_str(),
"-I",
TestDir.c_str(),
},
"test.cpp"));
}
} // namespace
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