64 lines · cpp
1//===----------------------------------------------------------------------===//2//3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.4// See https://llvm.org/LICENSE.txt for license information.5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception6//7//===----------------------------------------------------------------------===//8 9// <complex>10 11// complex& operator-=(const complex& rhs); // constexpr in C++2012 13#include <complex>14#include <cassert>15 16#include "test_macros.h"17 18template <class T>19TEST_CONSTEXPR_CXX2020bool21test()22{23 std::complex<T> c;24 const std::complex<T> c2(1.5, 2.5);25 assert(c.real() == 0);26 assert(c.imag() == 0);27 c -= c2;28 assert(c.real() == -1.5);29 assert(c.imag() == -2.5);30 c -= c2;31 assert(c.real() == -3);32 assert(c.imag() == -5);33 34 std::complex<T> c3;35 36 c3 = c;37 std::complex<int> ic (1,1);38 c3 -= ic;39 assert(c3.real() == -4);40 assert(c3.imag() == -6);41 42 c3 = c;43 std::complex<float> fc (1,1);44 c3 -= fc;45 assert(c3.real() == -4);46 assert(c3.imag() == -6);47 return true;48}49 50int main(int, char**)51{52 test<float>();53 test<double>();54 test<long double>();55 56#if TEST_STD_VER >= 2057 static_assert(test<float>());58 static_assert(test<double>());59 static_assert(test<long double>());60#endif61 62 return 0;63}64