44 lines
1.2 KiB
C++
44 lines
1.2 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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// UNSUPPORTED: c++03, c++11, c++14, c++17, c++20, c++23
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// <complex>
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// template<size_t I, class T> struct tuple_element;
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#include <cassert>
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#include <complex>
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#include <concepts>
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template <std::size_t I, typename C>
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concept HasTupleElement = requires { std::tuple_element<I, C>{}; };
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struct SomeObject {};
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static_assert(!HasTupleElement<0, SomeObject>);
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static_assert(!HasTupleElement<1, SomeObject>);
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static_assert(!HasTupleElement<3, SomeObject>);
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template <typename T>
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void test() {
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using C = std::complex<T>;
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static_assert(HasTupleElement<0, C>);
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static_assert(HasTupleElement<1, C>);
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static_assert(std::same_as<typename std::tuple_element<0, C>::type, T>);
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static_assert(std::same_as<typename std::tuple_element<1, C>::type, T>);
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}
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void test() {
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test<float>();
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test<double>();
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test<long double>();
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}
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