static clang::CanQualType getClangBuiltinTypeFromTypedef(
clang::Sema &sema, StringRef typedefName) {
auto &context = sema.getASTContext();
auto identifier = &context.Idents.get(typedefName);
auto found = sema.LookupSingleName(sema.TUScope, identifier,
clang::SourceLocation(),
clang::Sema::LookupOrdinaryName);
auto typedefDecl = dyn_cast_or_null<clang::TypedefDecl>(found);
if (!typedefDecl)
return {};
auto underlyingTy =
context.getCanonicalType(typedefDecl->getUnderlyingType());
if (underlyingTy->getAs<clang::BuiltinType>())
return underlyingTy;
return {};
}
