72 Ambiguous erf(Ambiguous){ return Ambiguous(); }  in erf()  function
923     static_assert((std::is_same<decltype(std::erf((float)0)), float>::value), "");  in test_erf()
924     static_assert((std::is_same<decltype(std::erf((bool)0)), double>::value), "");  in test_erf()
925     static_assert((std::is_same<decltype(std::erf((unsigned short)0)), double>::value), "");  in test_erf()
926     static_assert((std::is_same<decltype(std::erf((int)0)), double>::value), "");  in test_erf()
927     static_assert((std::is_same<decltype(std::erf((unsigned int)0)), double>::value), "");  in test_erf()
928     static_assert((std::is_same<decltype(std::erf((long)0)), double>::value), "");  in test_erf()
929     static_assert((std::is_same<decltype(std::erf((unsigned long)0)), double>::value), "");  in test_erf()
930     static_assert((std::is_same<decltype(std::erf((long long)0)), double>::value), "");  in test_erf()
931     static_assert((std::is_same<decltype(std::erf((unsigned long long)0)), double>::value), "");  in test_erf()
932     static_assert((std::is_same<decltype(std::erf((double)0)), double>::value), "");  in test_erf()
933     static_assert((std::is_same<decltype(std::erf((long double)0)), long double>::value), "");  in test_erf()
936     static_assert((std::is_same<decltype(erf(Ambiguous())), Ambiguous>::value), "");  in test_erf()
937     assert(std::erf(0) == 0);  in test_erf()