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 <__availability>
15 #include <__config>
16 #include <__debug>
17 #include <__format/format_error.h>
18 #include <__format/format_fwd.h>
19 #include <__format/format_parse_context.h>
20 #include <__format/formatter.h>
21 #include <__format/formatter_integral.h>
22 #include <__format/parser_std_format_spec.h>
23 #include <__utility/unreachable.h>
24 #include <string_view>
25 
26 #ifndef _LIBCPP_HAS_NO_LOCALIZATION
27 #  include <locale>
28 #endif
29 
30 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
31 #  pragma GCC system_header
32 #endif
33 
34 _LIBCPP_BEGIN_NAMESPACE_STD
35 
36 #if _LIBCPP_STD_VER > 17
37 
38 template <__formatter::__char_type _CharT>
39 struct _LIBCPP_TEMPLATE_VIS _LIBCPP_AVAILABILITY_FORMAT formatter<bool, _CharT> {
40 public:
41   _LIBCPP_HIDE_FROM_ABI constexpr auto
42   parse(basic_format_parse_context<_CharT>& __parse_ctx) -> decltype(__parse_ctx.begin()) {
43     auto __result = __parser_.__parse(__parse_ctx, __format_spec::__fields_integral);
44     __format_spec::__process_parsed_bool(__parser_);
45     return __result;
46   }
47 
48   _LIBCPP_HIDE_FROM_ABI auto format(bool __value, auto& __ctx) const -> decltype(__ctx.out()) {
49     switch (__parser_.__type_) {
50     case __format_spec::__type::__default:
51     case __format_spec::__type::__string:
52       return __formatter::__format_bool(__value, __ctx, __parser_.__get_parsed_std_specifications(__ctx));
53 
54     case __format_spec::__type::__binary_lower_case:
55     case __format_spec::__type::__binary_upper_case:
56     case __format_spec::__type::__octal:
57     case __format_spec::__type::__decimal:
58     case __format_spec::__type::__hexadecimal_lower_case:
59     case __format_spec::__type::__hexadecimal_upper_case:
60       // Promotes bool to an integral type. This reduces the number of
61       // instantiations of __format_integer reducing code size.
62       return __formatter::__format_integer(
63           static_cast<unsigned>(__value), __ctx, __parser_.__get_parsed_std_specifications(__ctx));
64 
65     default:
66       _LIBCPP_ASSERT(false, "The parse function should have validated the type");
67       __libcpp_unreachable();
68     }
69   }
70 
71   __format_spec::__parser<_CharT> __parser_;
72 };
73 
74 #endif //_LIBCPP_STD_VER > 17
75 
76 _LIBCPP_END_NAMESPACE_STD
77 
78 #endif // _LIBCPP___FORMAT_FORMATTER_BOOL_H
79