73 Ambiguous erf(Ambiguous){ return Ambiguous(); }  in erf()  function
811     static_assert((std::is_same<decltype(std::erf((float)0)), float>::value), "");  in test_erf()
812     static_assert((std::is_same<decltype(std::erf((bool)0)), double>::value), "");  in test_erf()
813     static_assert((std::is_same<decltype(std::erf((unsigned short)0)), double>::value), "");  in test_erf()
814     static_assert((std::is_same<decltype(std::erf((int)0)), double>::value), "");  in test_erf()
815     static_assert((std::is_same<decltype(std::erf((unsigned int)0)), double>::value), "");  in test_erf()
816     static_assert((std::is_same<decltype(std::erf((long)0)), double>::value), "");  in test_erf()
817     static_assert((std::is_same<decltype(std::erf((unsigned long)0)), double>::value), "");  in test_erf()
818     static_assert((std::is_same<decltype(std::erf((long long)0)), double>::value), "");  in test_erf()
819     static_assert((std::is_same<decltype(std::erf((unsigned long long)0)), double>::value), "");  in test_erf()
820     static_assert((std::is_same<decltype(std::erf((double)0)), double>::value), "");  in test_erf()
821     static_assert((std::is_same<decltype(std::erf((long double)0)), long double>::value), "");  in test_erf()
824     static_assert((std::is_same<decltype(erf(Ambiguous())), Ambiguous>::value), "");  in test_erf()
825     assert(std::erf(0) == 0);  in test_erf()