30#ifndef _GLIBCXX_FORMAT_FWD_H
31#define _GLIBCXX_FORMAT_FWD_H 1
34#pragma GCC system_header
38#ifdef __glibcxx_format
40namespace std _GLIBCXX_VISIBILITY(default)
42_GLIBCXX_BEGIN_NAMESPACE_VERSION
45 template<
typename _Out,
typename _CharT>
class basic_format_context;
48 template<
typename _CharT>
class basic_format_parse_context;
51 template<
typename _Tp,
typename _CharT =
char>
struct formatter;
55#ifdef _GLIBCXX_USE_WCHAR_T
56 template<
typename _CharT>
57 concept __char = same_as<_CharT, char> || same_as<_CharT, wchar_t>;
59 template<
typename _CharT>
60 concept __char = same_as<_CharT, char>;
63 template<__
char _CharT>
64 struct __formatter_int;
67_GLIBCXX_END_NAMESPACE_VERSION
70#pragma GCC diagnostic pop
ISO C++ entities toplevel namespace is std.