1 //===----------------------------------------------------------------------===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is dual licensed under the MIT and the University of Illinois Open 6 // Source Licenses. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 10 // <complex> 11 12 // template<Arithmetic T> 13 // T 14 // real(const T& x); 15 16 #include <complex> 17 #include <type_traits> 18 #include <cassert> 19 20 #include "../cases.h" 21 22 template <class T, int x> 23 void 24 test(typename std::enable_if<std::is_integral<T>::value>::type* = 0) 25 { 26 static_assert((std::is_same<decltype(std::real(T(x))), double>::value), ""); 27 assert(std::real(x) == x); 28 #if _LIBCPP_STD_VER > 11 29 constexpr T val {x}; 30 static_assert(std::real(val) == val, ""); 31 constexpr std::complex<T> t{val, val}; 32 static_assert(t.real() == x, "" ); 33 #endif 34 } 35 36 template <class T, int x> 37 void 38 test(typename std::enable_if<!std::is_integral<T>::value>::type* = 0) 39 { 40 static_assert((std::is_same<decltype(std::real(T(x))), T>::value), ""); 41 assert(std::real(x) == x); 42 #if _LIBCPP_STD_VER > 11 43 constexpr T val {x}; 44 static_assert(std::real(val) == val, ""); 45 constexpr std::complex<T> t{val, val}; 46 static_assert(t.real() == x, "" ); 47 #endif 48 } 49 50 template <class T> 51 void 52 test() 53 { 54 test<T, 0>(); 55 test<T, 1>(); 56 test<T, 10>(); 57 } 58 59 int main() 60 { 61 test<float>(); 62 test<double>(); 63 test<long double>(); 64 test<int>(); 65 test<unsigned>(); 66 test<long long>(); 67 } 68
