| //===----------------------------------------------------------------------===// |
| // |
| // 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 |
| |
| // struct from_range_t { explicit from_range_t() = default; }; // Since C++23 |
| // inline constexpr from_range_t from_range{}; // Since C++23 |
| |
| #include <ranges> |
| |
| template <class T> |
| void check(std::from_range_t); |
| |
| template <class T> |
| concept IsCtrNonexplicit = requires { |
| check<T>({}); |
| }; |
| |
| // Verify that the constructor is `explicit`. |
| static_assert(!IsCtrNonexplicit<std::from_range_t>); |
