piecewise_construct.h 1016 B

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  1. //===----------------------------------------------------------------------===//
  2. //
  3. // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
  4. // See https://llvm.org/LICENSE.txt for license information.
  5. // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  6. //
  7. //===----------------------------------------------------------------------===//
  8. #ifndef _LIBCPP___UTILITY_PIECEWISE_CONSTRUCT_H
  9. #define _LIBCPP___UTILITY_PIECEWISE_CONSTRUCT_H
  10. #include <__config>
  11. #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
  12. # pragma GCC system_header
  13. #endif
  14. _LIBCPP_BEGIN_NAMESPACE_STD
  15. struct _LIBCPP_TEMPLATE_VIS piecewise_construct_t {
  16. explicit piecewise_construct_t() = default;
  17. };
  18. #if _LIBCPP_STD_VER >= 17
  19. inline constexpr piecewise_construct_t piecewise_construct = piecewise_construct_t();
  20. #elif !defined(_LIBCPP_CXX03_LANG)
  21. constexpr piecewise_construct_t piecewise_construct = piecewise_construct_t();
  22. #endif
  23. _LIBCPP_END_NAMESPACE_STD
  24. #endif // _LIBCPP___UTILITY_PIECEWISE_CONSTRUCT_H