// -*- C++ -*-
//===----------------------------------------------------------------------===//
//
// 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
//
//===----------------------------------------------------------------------===//

#ifndef _LIBCPP___FWD_FORMAT_H
#define _LIBCPP___FWD_FORMAT_H

#include <__config>

#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
#  pragma GCC system_header
#endif

#if _LIBCPP_STD_VER >= 20

_LIBCPP_BEGIN_NAMESPACE_STD

template <class _Context>
class basic_format_arg;

template <class _OutIt, class _CharT>
class basic_format_context;

template <class _Tp, class _CharT = char>
struct formatter;

#  if _LIBCPP_STD_VER >= 23

_LIBCPP_DIAGNOSTIC_PUSH
_LIBCPP_CLANG_DIAGNOSTIC_IGNORED("-Wshadow")
_LIBCPP_GCC_DIAGNOSTIC_IGNORED("-Wshadow")
// This shadows map, set, and string.
enum class range_format { disabled, map, set, sequence, string, debug_string };
_LIBCPP_DIAGNOSTIC_POP

template <class _Rp>
constexpr range_format format_kind = [] {
  // [format.range.fmtkind]/1
  // A program that instantiates the primary template of format_kind is ill-formed.
  static_assert(sizeof(_Rp) != sizeof(_Rp), "create a template specialization of format_kind for your type");
  return range_format::disabled;
}();

#  endif // _LIBCPP_STD_VER >= 23

_LIBCPP_END_NAMESPACE_STD

#endif // _LIBCPP_STD_VER >= 20

#endif // _LIBCPP___FWD_FORMAT_H
