| 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 |
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| 10 | |
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| 11 | // struct from_range_t { explicit from_range_t() = default; }; // Since C++23 |
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| 12 | // inline constexpr from_range_t from_range{}; // Since C++23 |
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| 13 | |
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| 14 | #include <ranges> |
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| 15 | |
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| 16 | template <class T> |
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| 17 | void check(std::from_range_t); |
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| 18 | |
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| 19 | template <class T> |
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| 20 | concept IsCtrNonexplicit = requires { |
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| 21 | check<T>({}); |
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| 22 | }; |
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| 23 | |
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| 24 | // Verify that the constructor is `explicit`. |
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| 25 | static_assert(!IsCtrNonexplicit<std::from_range_t>); |
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| 26 | |
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