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0001 // Copyright (c) 2016-2023 Antony Polukhin 0002 // 0003 // Distributed under the Boost Software License, Version 1.0. (See accompanying 0004 // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) 0005 0006 #ifndef BOOST_PFR_FUNCTIONS_FOR_HPP 0007 #define BOOST_PFR_FUNCTIONS_FOR_HPP 0008 #pragma once 0009 0010 #include <boost/pfr/detail/config.hpp> 0011 0012 #include <boost/pfr/ops_fields.hpp> 0013 #include <boost/pfr/io_fields.hpp> 0014 0015 /// \file boost/pfr/functions_for.hpp 0016 /// Contains BOOST_PFR_FUNCTIONS_FOR macro that defined comparison and stream operators for T along with hash_value function. 0017 /// \b Example: 0018 /// \code 0019 /// #include <boost/pfr/functions_for.hpp> 0020 /// 0021 /// namespace my_namespace { 0022 /// struct my_struct { // No operators defined for that structure 0023 /// int i; short s; char data[7]; bool bl; int a,b,c,d,e,f; 0024 /// }; 0025 /// BOOST_PFR_FUNCTIONS_FOR(my_struct) 0026 /// } 0027 /// \endcode 0028 /// 0029 /// \podops for other ways to define operators and more details. 0030 /// 0031 /// \b Synopsis: 0032 0033 /// \def BOOST_PFR_FUNCTIONS_FOR(T) 0034 /// Defines comparison and stream operators for T along with hash_value function. 0035 /// 0036 /// \b Example: 0037 /// \code 0038 /// #include <boost/pfr/functions_for.hpp> 0039 /// struct comparable_struct { // No operators defined for that structure 0040 /// int i; short s; char data[7]; bool bl; int a,b,c,d,e,f; 0041 /// }; 0042 /// BOOST_PFR_FUNCTIONS_FOR(comparable_struct) 0043 /// // ... 0044 /// 0045 /// comparable_struct s1 {0, 1, "Hello", false, 6,7,8,9,10,11}; 0046 /// comparable_struct s2 {0, 1, "Hello", false, 6,7,8,9,10,11111}; 0047 /// assert(s1 < s2); 0048 /// std::cout << s1 << std::endl; // Outputs: {0, 1, H, e, l, l, o, , , 0, 6, 7, 8, 9, 10, 11} 0049 /// \endcode 0050 /// 0051 /// \podops for other ways to define operators and more details. 0052 /// 0053 /// \b Defines \b following \b for \b T: 0054 /// \code 0055 /// bool operator==(const T& lhs, const T& rhs); 0056 /// bool operator!=(const T& lhs, const T& rhs); 0057 /// bool operator< (const T& lhs, const T& rhs); 0058 /// bool operator> (const T& lhs, const T& rhs); 0059 /// bool operator<=(const T& lhs, const T& rhs); 0060 /// bool operator>=(const T& lhs, const T& rhs); 0061 /// 0062 /// template <class Char, class Traits> 0063 /// std::basic_ostream<Char, Traits>& operator<<(std::basic_ostream<Char, Traits>& out, const T& value); 0064 /// 0065 /// template <class Char, class Traits> 0066 /// std::basic_istream<Char, Traits>& operator>>(std::basic_istream<Char, Traits>& in, T& value); 0067 /// 0068 /// // helper function for Boost unordered containers and boost::hash<>. 0069 /// std::size_t hash_value(const T& value); 0070 /// \endcode 0071 0072 #define BOOST_PFR_FUNCTIONS_FOR(T) \ 0073 BOOST_PFR_MAYBE_UNUSED inline bool operator==(const T& lhs, const T& rhs) { return ::boost::pfr::eq_fields(lhs, rhs); } \ 0074 BOOST_PFR_MAYBE_UNUSED inline bool operator!=(const T& lhs, const T& rhs) { return ::boost::pfr::ne_fields(lhs, rhs); } \ 0075 BOOST_PFR_MAYBE_UNUSED inline bool operator< (const T& lhs, const T& rhs) { return ::boost::pfr::lt_fields(lhs, rhs); } \ 0076 BOOST_PFR_MAYBE_UNUSED inline bool operator> (const T& lhs, const T& rhs) { return ::boost::pfr::gt_fields(lhs, rhs); } \ 0077 BOOST_PFR_MAYBE_UNUSED inline bool operator<=(const T& lhs, const T& rhs) { return ::boost::pfr::le_fields(lhs, rhs); } \ 0078 BOOST_PFR_MAYBE_UNUSED inline bool operator>=(const T& lhs, const T& rhs) { return ::boost::pfr::ge_fields(lhs, rhs); } \ 0079 template <class Char, class Traits> \ 0080 BOOST_PFR_MAYBE_UNUSED inline ::std::basic_ostream<Char, Traits>& operator<<(::std::basic_ostream<Char, Traits>& out, const T& value) { \ 0081 return out << ::boost::pfr::io_fields(value); \ 0082 } \ 0083 template <class Char, class Traits> \ 0084 BOOST_PFR_MAYBE_UNUSED inline ::std::basic_istream<Char, Traits>& operator>>(::std::basic_istream<Char, Traits>& in, T& value) { \ 0085 return in >> ::boost::pfr::io_fields(value); \ 0086 } \ 0087 BOOST_PFR_MAYBE_UNUSED inline std::size_t hash_value(const T& v) { \ 0088 return ::boost::pfr::hash_fields(v); \ 0089 } \ 0090 /**/ 0091 0092 #endif // BOOST_PFR_FUNCTIONS_FOR_HPP 0093
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