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_FORMATTER_BOOL_H
11 #define _LIBCPP___FORMAT_FORMATTER_BOOL_H
12 
13 #include <__algorithm/copy.h>
14 #include <__assert>
15 #include <__availability>
16 #include <__config>
17 #include <__format/concepts.h>
18 #include <__format/format_parse_context.h>
19 #include <__format/formatter.h>
20 #include <__format/formatter_integral.h>
21 #include <__format/parser_std_format_spec.h>
22 #include <__utility/unreachable.h>
23 
24 #ifndef _LIBCPP_HAS_NO_LOCALIZATION
25 #  include <locale>
26 #endif
27 
28 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
29 #  pragma GCC system_header
30 #endif
31 
32 _LIBCPP_BEGIN_NAMESPACE_STD
33 
34 #if _LIBCPP_STD_VER >= 20
35 
36 template <__fmt_char_type _CharT>
37 struct _LIBCPP_TEMPLATE_VIS formatter<bool, _CharT> {
38 public:
39   template <class _ParseContext>
40   _LIBCPP_HIDE_FROM_ABI constexpr typename _ParseContext::iterator parse(_ParseContext& __ctx) {
41     typename _ParseContext::iterator __result = __parser_.__parse(__ctx, __format_spec::__fields_integral);
42     __format_spec::__process_parsed_bool(__parser_, "a bool");
43     return __result;
44   }
45 
46   template <class _FormatContext>
47   _LIBCPP_HIDE_FROM_ABI typename _FormatContext::iterator format(bool __value, _FormatContext& __ctx) const {
48     switch (__parser_.__type_) {
49     case __format_spec::__type::__default:
50     case __format_spec::__type::__string:
51       return __formatter::__format_bool(__value, __ctx, __parser_.__get_parsed_std_specifications(__ctx));
52 
53     case __format_spec::__type::__binary_lower_case:
54     case __format_spec::__type::__binary_upper_case:
55     case __format_spec::__type::__octal:
56     case __format_spec::__type::__decimal:
57     case __format_spec::__type::__hexadecimal_lower_case:
58     case __format_spec::__type::__hexadecimal_upper_case:
59       // Promotes bool to an integral type. This reduces the number of
60       // instantiations of __format_integer reducing code size.
61       return __formatter::__format_integer(
62           static_cast<unsigned>(__value), __ctx, __parser_.__get_parsed_std_specifications(__ctx));
63 
64     default:
65       _LIBCPP_ASSERT_UNCATEGORIZED(false, "The parse function should have validated the type");
66       __libcpp_unreachable();
67     }
68   }
69 
70   __format_spec::__parser<_CharT> __parser_;
71 };
72 
73 #endif //_LIBCPP_STD_VER >= 20
74 
75 _LIBCPP_END_NAMESPACE_STD
76 
77 #endif // _LIBCPP___FORMAT_FORMATTER_BOOL_H
78