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<Arithmetic T>
12// T
13// arg(T x);
14
15#include <complex>
16#include <type_traits>
17#include <cassert>
18
19#include "test_macros.h"
20#include "../cases.h"
21
22template <class T>
23void
24test(T x, typename std::enable_if<std::is_integral<T>::value>::type* = 0)
25{
26 static_assert((std::is_same<decltype(std::arg(x)), double>::value), "");
27 assert(std::arg(x) == arg(std::complex<double>(static_cast<double>(x), 0)));
28}
29
30template <class T>
31void
32test(T x, typename std::enable_if<!std::is_integral<T>::value>::type* = 0)
33{
34 static_assert((std::is_same<decltype(std::arg(x)), T>::value), "");
35 assert(std::arg(x) == arg(std::complex<T>(x, 0)));
36}
37
38template <class T>
39void
40test()
41{
42 test<T>(0);
43 test<T>(1);
44 test<T>(10);
45}
46
47int main(int, char**)
48{
49 test<float>();
50 test<double>();
51 test<long double>();
52 test<int>();
53 test<unsigned>();
54 test<long long>();
55
56 return 0;
57}
58

source code of libcxx/test/std/numerics/complex.number/cmplx.over/arg.pass.cpp