| // -*-c++-*- |
| // vim: set ft=cpp: |
| |
| /* Distributed under the OSI-approved BSD 3-Clause License. See accompanying |
| file Copyright.txt or https://cmake.org/licensing for details. */ |
| #ifndef cm_utility |
| #define cm_utility |
| |
| #if __cplusplus >= 201703L || (defined(_MSVC_LANG) && _MSVC_LANG >= 201703L) |
| # define CMake_HAVE_CXX_IN_PLACE |
| #endif |
| |
| #include <utility> // IWYU pragma: export |
| |
| namespace cm { |
| |
| #if defined(CMake_HAVE_CXX_IN_PLACE) |
| |
| using std::in_place_t; |
| using std::in_place; |
| |
| #else |
| |
| struct in_place_t |
| { |
| explicit in_place_t() = default; |
| }; |
| |
| constexpr in_place_t in_place{}; |
| |
| #endif |
| } |
| |
| #endif |
