70 lines
1.6 KiB
C++
70 lines
1.6 KiB
C++
//===----------------------------------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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// <complex>
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// template<Arithmetic T>
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// T
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// imag(const T& x);
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#include <complex>
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#include <type_traits>
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#include <cassert>
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#include "test_macros.h"
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#include "../cases.h"
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template <class T, int x>
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void
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test(typename std::enable_if<std::is_integral<T>::value>::type* = 0)
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{
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static_assert((std::is_same<decltype(std::imag(T(x))), double>::value), "");
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assert(std::imag(x) == 0);
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#if TEST_STD_VER > 11
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constexpr T val {x};
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static_assert(std::imag(val) == 0, "");
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constexpr std::complex<T> t{val, val};
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static_assert(t.imag() == x, "" );
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#endif
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}
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template <class T, int x>
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void
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test(typename std::enable_if<!std::is_integral<T>::value>::type* = 0)
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{
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static_assert((std::is_same<decltype(std::imag(T(x))), T>::value), "");
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assert(std::imag(x) == 0);
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#if TEST_STD_VER > 11
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constexpr T val {x};
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static_assert(std::imag(val) == 0, "");
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constexpr std::complex<T> t{val, val};
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static_assert(t.imag() == x, "" );
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#endif
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}
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template <class T>
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void
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test()
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{
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test<T, 0>();
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test<T, 1>();
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test<T, 10>();
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}
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int main(int, char**)
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{
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test<float>();
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test<double>();
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test<long double>();
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test<int>();
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test<unsigned>();
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test<long long>();
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return 0;
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}
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