Implement P0030R1: Introduce a 3-Argument Overload to std::hypot git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@269772 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/include/cmath b/include/cmath index ebbde18..b3e9594 100644 --- a/include/cmath +++ b/include/cmath
@@ -209,6 +209,10 @@ float hypotf(float x, float y); long double hypotl(long double x, long double y); +double hypot(double x, double y, double z); // C++17 +float hypot(float x, float y, float z); // C++17 +long double hypot(long double x, long double y, long double z); // C++17 + int ilogb (arithmetic x); int ilogbf(float x); int ilogbl(long double x); @@ -548,6 +552,30 @@ using ::lgammaf; #endif // __sun__ +#if _LIBCPP_STD_VER > 14 +inline _LIBCPP_INLINE_VISIBILITY float hypot( float x, float y, float z ) { return sqrt(x*x + y*y + z*z); } +inline _LIBCPP_INLINE_VISIBILITY double hypot( double x, double y, double z ) { return sqrt(x*x + y*y + z*z); } +inline _LIBCPP_INLINE_VISIBILITY long double hypot( long double x, long double y, long double z ) { return sqrt(x*x + y*y + z*z); } + +template <class _A1, class _A2, class _A3> +inline _LIBCPP_INLINE_VISIBILITY +typename std::__lazy_enable_if +< + std::is_arithmetic<_A1>::value && + std::is_arithmetic<_A2>::value && + std::is_arithmetic<_A3>::value, + std::__promote<_A1, _A2, _A3> +>::type +hypot(_A1 __lcpp_x, _A2 __lcpp_y, _A3 __lcpp_z) _NOEXCEPT +{ + typedef typename std::__promote<_A1, _A2, _A3>::type __result_type; + static_assert((!(std::is_same<_A1, __result_type>::value && + std::is_same<_A2, __result_type>::value && + std::is_same<_A3, __result_type>::value)), ""); + return hypot((__result_type)__lcpp_x, (__result_type)__lcpp_y, (__result_type)__lcpp_z); +} +#endif + _LIBCPP_END_NAMESPACE_STD #endif // _LIBCPP_CMATH 