| 1 | //===----------------------------------------------------------------------===// |
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| 2 | // |
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| 3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
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| 4 | // See https://llvm.org/LICENSE.txt for license information. |
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| 5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
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| 6 | // |
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| 7 | //===----------------------------------------------------------------------===// |
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| 8 | |
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| 9 | // UNSUPPORTED: c++03, c++11, c++14, c++17, c++20, c++23 |
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| 10 | |
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| 11 | // <complex> |
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| 12 | |
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| 13 | // template<class T> struct tuple_size; |
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| 14 | |
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| 15 | #include <cassert> |
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| 16 | #include <complex> |
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| 17 | #include <concepts> |
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| 18 | |
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| 19 | template <typename C> |
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| 20 | concept HasTupleSize = requires { std::tuple_size<C>{}; }; |
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| 21 | |
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| 22 | struct SomeObject {}; |
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| 23 | |
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| 24 | static_assert(!HasTupleSize<SomeObject>); |
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| 25 | |
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| 26 | template <typename T> |
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| 27 | void test() { |
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| 28 | using C = std::complex<T>; |
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| 29 | |
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| 30 | static_assert(HasTupleSize<C>); |
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| 31 | static_assert(std::same_as<typename std::tuple_size<C>::value_type, size_t>); |
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| 32 | static_assert(std::tuple_size<C>() == 2); |
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| 33 | } |
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| 34 | |
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| 35 | void test() { |
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| 36 | test<float>(); |
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| 37 | test<double>(); |
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| 38 | test<long double>(); |
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| 39 | } |
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| 40 | |
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