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#include "clang/AST/DeclarationName.h"
#include "clang/Frontend/CompilerInstance.h"
#include "clang/Frontend/FrontendAction.h"
#include "clang/Parse/ParseAST.h"
#include "clang/Sema/Lookup.h"
#include "clang/Sema/Sema.h"
#include "clang/Tooling/Tooling.h"
#include "gtest/gtest.h"
using namespace llvm;
using namespace clang;
using namespace clang::tooling;
namespace {
class LookupAction : public ASTFrontendAction {
std::unique_ptr<ASTConsumer>
CreateASTConsumer(CompilerInstance &CI, StringRef /*Unused*/) override {
return std::make_unique<clang::ASTConsumer>();
}
void ExecuteAction() override {
CompilerInstance &CI = getCompilerInstance();
ASSERT_FALSE(CI.hasSema());
CI.createSema(getTranslationUnitKind(), nullptr);
ASSERT_TRUE(CI.hasSema());
Sema &S = CI.getSema();
ParseAST(S);
ASTContext &Ctx = S.getASTContext();
auto Name = &Ctx.Idents.get("Foo");
LookupResult R_cpp(S, Name, SourceLocation(), Sema::LookupOrdinaryName);
S.LookupName(R_cpp, S.TUScope, /*AllowBuiltinCreation=*/false,
/*ForceNoCPlusPlus=*/false);
// By this point, parsing is done and S.TUScope is nullptr
// CppLookupName will perform an early return with no results if the Scope
// we pass in is nullptr. We expect to find nothing.
ASSERT_TRUE(R_cpp.empty());
// On the other hand, the non-C++ path doesn't care if the Scope passed in
// is nullptr. We'll force the non-C++ path with a flag.
LookupResult R_nocpp(S, Name, SourceLocation(), Sema::LookupOrdinaryName);
S.LookupName(R_nocpp, S.TUScope, /*AllowBuiltinCreation=*/false,
/*ForceNoCPlusPlus=*/true);
ASSERT_TRUE(!R_nocpp.empty());
}
};
TEST(SemaLookupTest, ForceNoCPlusPlusPath) {
const char *file_contents = R"objcxx(
@protocol Foo
@end
@interface Foo <Foo>
@end
)objcxx";
ASSERT_TRUE(runToolOnCodeWithArgs(std::make_unique<LookupAction>(),
file_contents, {"-x", "objective-c++"},
"test.mm"));
}
} // namespace
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