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-exception
6//
7//===----------------------------------------------------------------------===//
8
9// <complex>
10
11// template<class T>
12// complex<T>
13// operator-(const T& lhs, const complex<T>& rhs); // constexpr in C++20
14
15#include <complex>
16#include <cassert>
17
18#include "test_macros.h"
19
20template <class T>
21TEST_CONSTEXPR_CXX20
22bool
23test()
24{
25 {
26 const T lhs(1.5);
27 const std::complex<T> rhs(3.5, 4.5);
28 assert(lhs - rhs == std::complex<T>(-2.0, -4.5));
29 }
30 {
31 const T lhs(1.5);
32 const std::complex<T> rhs(-3.5, 4.5);
33 assert(lhs - rhs == std::complex<T>(5.0, -4.5));
34 }
35 return true;
36}
37
38int main(int, char**) {
39 test<float>();
40 test<double>();
41 test<long double>();
42
43#if TEST_STD_VER > 17
44 static_assert(test<float>());
45 static_assert(test<double>());
46 static_assert(test<long double>());
47#endif
48
49 return 0;
50}
51

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source code of libcxx/test/std/numerics/complex.number/complex.ops/scalar_minus_complex.pass.cpp