1 // -*- C++ -*- 2 //===----------------------------------------------------------------------===// 3 // 4 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 5 // See https://llvm.org/LICENSE.txt for license information. 6 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 7 // 8 //===----------------------------------------------------------------------===// 9 10 #ifndef _LIBCPP___FORMAT_FORMAT_TO_N_RESULT_H 11 #define _LIBCPP___FORMAT_FORMAT_TO_N_RESULT_H 12 13 #include <__config> 14 #include <__iterator/incrementable_traits.h> 15 16 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 17 # pragma GCC system_header 18 #endif 19 20 _LIBCPP_BEGIN_NAMESPACE_STD 21 22 #if _LIBCPP_STD_VER > 17 23 24 // TODO FMT Remove this once we require compilers with proper C++20 support. 25 // If the compiler has no concepts support, the format header will be disabled. 26 // Without concepts support enable_if needs to be used and that too much effort 27 // to support compilers with partial C++20 support. 28 #if !defined(_LIBCPP_HAS_NO_CONCEPTS) 29 30 template <class _OutIt> 31 struct _LIBCPP_TEMPLATE_VIS format_to_n_result { 32 _OutIt out; 33 iter_difference_t<_OutIt> size; 34 }; 35 36 #endif // !defined(_LIBCPP_HAS_NO_CONCEPTS) 37 #endif //_LIBCPP_STD_VER > 17 38 39 _LIBCPP_END_NAMESPACE_STD 40 41 #endif // _LIBCPP___FORMAT_FORMAT_TO_N_RESULT_H 42