1 // Copyright Kevlin Henney, 2000-2005. 2 // Copyright Alexander Nasonov, 2006-2010. 3 // Copyright Antony Polukhin, 2011-2021. 4 // 5 // Distributed under the Boost Software License, Version 1.0. (See 6 // accompanying file LICENSE_1_0.txt or copy at 7 // http://www.boost.org/LICENSE_1_0.txt) 8 // 9 // what: lexical_cast custom keyword cast 10 // who: contributed by Kevlin Henney, 11 // enhanced with contributions from Terje Slettebo, 12 // with additional fixes and suggestions from Gennaro Prota, 13 // Beman Dawes, Dave Abrahams, Daryle Walker, Peter Dimov, 14 // Alexander Nasonov, Antony Polukhin, Justin Viiret, Michael Hofmann, 15 // Cheng Yang, Matthew Bradbury, David W. Birdsall, Pavel Korzh and other Boosters 16 // when: November 2000, March 2003, June 2005, June 2006, March 2011 - 2014 17 18 #ifndef BOOST_LEXICAL_CAST_DETAIL_LCAST_CHAR_CONSTANTS_HPP 19 #define BOOST_LEXICAL_CAST_DETAIL_LCAST_CHAR_CONSTANTS_HPP 20 21 #include <boost/config.hpp> 22 #ifdef BOOST_HAS_PRAGMA_ONCE 23 # pragma once 24 #endif 25 26 namespace boost 27 { 28 namespace detail // '0', '-', '+', 'e', 'E' and '.' constants 29 { 30 template < typename Char > 31 struct lcast_char_constants { 32 // We check in tests assumption that static casted character is 33 // equal to correctly written C++ literal: U'0' == static_cast<char32_t>('0') 34 BOOST_STATIC_CONSTANT(Char, zero = static_cast<Char>('0')); 35 BOOST_STATIC_CONSTANT(Char, minus = static_cast<Char>('-')); 36 BOOST_STATIC_CONSTANT(Char, plus = static_cast<Char>('+')); 37 BOOST_STATIC_CONSTANT(Char, lowercase_e = static_cast<Char>('e')); 38 BOOST_STATIC_CONSTANT(Char, capital_e = static_cast<Char>('E')); 39 BOOST_STATIC_CONSTANT(Char, c_decimal_separator = static_cast<Char>('.')); 40 }; 41 } 42 } // namespace boost 43 44 45 #endif // BOOST_LEXICAL_CAST_DETAIL_LCAST_CHAR_CONSTANTS_HPP 46 47