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//===----------------------------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
// UNSUPPORTED: c++03, c++11, c++14, c++17, c++20, c++23
// <complex>
// template<size_t I, class T> struct tuple_element;
#include <cassert>
#include <complex>
#include <concepts>
template <std::size_t I, typename C>
concept HasTupleElement = requires { std::tuple_element<I, C>{}; };
struct SomeObject {};
static_assert(!HasTupleElement<0, SomeObject>);
static_assert(!HasTupleElement<1, SomeObject>);
static_assert(!HasTupleElement<3, SomeObject>);
template <typename T>
void test() {
using C = std::complex<T>;
static_assert(HasTupleElement<0, C>);
static_assert(HasTupleElement<1, C>);
static_assert(std::same_as<typename std::tuple_element<0, C>::type, T>);
static_assert(std::same_as<typename std::tuple_element<1, C>::type, T>);
}
void test() {
test<float>();
test<double>();
test<long double>();
}
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