impl/error.hpp

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impl/error.hpp

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1		//
2		// Copyright (c) 2019 Vinnie Falco (vinnie.falco@gmail.com)
3		//
4		// Distributed under the Boost Software License, Version 1.0. (See accompanying
5		// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
6		//
7		// Official repository: https://github.com/boostorg/json
8		//
9
10		#ifndef BOOST_JSON_IMPL_ERROR_HPP
11		#define BOOST_JSON_IMPL_ERROR_HPP
12
13		#include <boost/system/error_category.hpp>
14		#include <type_traits>
15
16		namespace boost {
17		namespace system {
18		template<>
19		struct is_error_code_enum< ::boost::json::error >
20		{
21		static bool const value = true;
22		};
23		template<>
24		struct is_error_condition_enum< ::boost::json::condition >
25		{
26		static bool const value = true;
27		};
28		} // system
29		} // boost
30
31		namespace std {
32		template<>
33		struct is_error_code_enum< ::boost::json::error >
34		{
35		static bool const value = true;
36		};
37		template<>
38		struct is_error_condition_enum< ::boost::json::condition >
39		{
40		static bool const value = true;
41		};
42		} // std
43
44		namespace boost {
45		namespace json {
46		namespace detail {
47
48		struct error_code_category_t
49		: system::error_category
50		{
51		constexpr
52		error_code_category_t()
53		: system::error_category(0xB9A9B9922177C772)
54		{}
55
56		BOOST_JSON_DECL
57		const char*
58		name() const noexcept override;
59
60		BOOST_JSON_DECL
61		char const*
62		message( int ev, char* buf, std::size_t len ) const noexcept override;
63
64		BOOST_JSON_DECL
65		std::string
66		message( int ev ) const override;
67
68		BOOST_JSON_DECL
69		system::error_condition
70		default_error_condition( int ev ) const noexcept override;
71		};
72
73		extern
74		BOOST_JSON_DECL
75		error_code_category_t error_code_category;
76
77		struct error_condition_category_t
78		: system::error_category
79		{
80		constexpr
81		error_condition_category_t()
82		: system::error_category(0x37CEF5A036D24FD1)
83		{}
84
85		BOOST_JSON_DECL
86		const char*
87		name() const noexcept override;
88
89		BOOST_JSON_DECL
90		char const*
91		message( int ev, char*, std::size_t ) const noexcept override;
92
93		BOOST_JSON_DECL
94		std::string
95		message( int cv ) const override;
96		};
97
98		extern
99		BOOST_JSON_DECL
100		error_condition_category_t error_condition_category;
101
102		} // namespace detail
103
104		inline
105		BOOST_SYSTEM_CONSTEXPR
106		system::error_code
107	105190	make_error_code(error e) noexcept
108		{
109
110		return system::error_code(
111		static_cast<std::underlying_type<error>::type>(e),
112	105190	detail::error_code_category );
113		}
114
115		inline
116		BOOST_SYSTEM_CONSTEXPR
117		system::error_condition
118	154	make_error_condition(condition c) noexcept
119		{
120	154	return system::error_condition(
121		static_cast<std::underlying_type<condition>::type>(c),
122	154	detail::error_condition_category );
123		}
124
125		} // namespace json
126		} // namespace boost
127
128		#endif
129