lcast_char_constants.hpp 1.9 KB

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  1. // Copyright Kevlin Henney, 2000-2005.
  2. // Copyright Alexander Nasonov, 2006-2010.
  3. // Copyright Antony Polukhin, 2011-2019.
  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. #ifndef BOOST_LEXICAL_CAST_DETAIL_LCAST_CHAR_CONSTANTS_HPP
  18. #define BOOST_LEXICAL_CAST_DETAIL_LCAST_CHAR_CONSTANTS_HPP
  19. #include <boost/config.hpp>
  20. #ifdef BOOST_HAS_PRAGMA_ONCE
  21. # pragma once
  22. #endif
  23. namespace boost
  24. {
  25. namespace detail // '0', '-', '+', 'e', 'E' and '.' constants
  26. {
  27. template < typename Char >
  28. struct lcast_char_constants {
  29. // We check in tests assumption that static casted character is
  30. // equal to correctly written C++ literal: U'0' == static_cast<char32_t>('0')
  31. BOOST_STATIC_CONSTANT(Char, zero = static_cast<Char>('0'));
  32. BOOST_STATIC_CONSTANT(Char, minus = static_cast<Char>('-'));
  33. BOOST_STATIC_CONSTANT(Char, plus = static_cast<Char>('+'));
  34. BOOST_STATIC_CONSTANT(Char, lowercase_e = static_cast<Char>('e'));
  35. BOOST_STATIC_CONSTANT(Char, capital_e = static_cast<Char>('E'));
  36. BOOST_STATIC_CONSTANT(Char, c_decimal_separator = static_cast<Char>('.'));
  37. };
  38. }
  39. } // namespace boost
  40. #endif // BOOST_LEXICAL_CAST_DETAIL_LCAST_CHAR_CONSTANTS_HPP