OpenTTD Source  20241108-master-g80f628063a
format.hpp
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1 /*
2  * This file is part of OpenTTD.
3  * OpenTTD is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, version 2.
4  * OpenTTD is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
5  * See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>.
6  */
7 
10 #ifndef FORMAT_HPP
11 #define FORMAT_HPP
12 
13 #include "../3rdparty/fmt/format.h"
14 #include "strong_typedef_type.hpp"
15 
16 template <typename E, typename Char>
17 struct fmt::formatter<E, Char, std::enable_if_t<std::is_enum<E>::value>> : fmt::formatter<typename std::underlying_type<E>::type> {
18  using underlying_type = typename std::underlying_type<E>::type;
19  using parent = typename fmt::formatter<underlying_type>;
20 
21  constexpr fmt::format_parse_context::iterator parse(fmt::format_parse_context &ctx)
22  {
23  return parent::parse(ctx);
24  }
25 
26  fmt::format_context::iterator format(const E &e, format_context &ctx) const
27  {
28  return parent::format(underlying_type(e), ctx);
29  }
30 };
31 
32 template <typename T, typename Char>
33 struct fmt::formatter<T, Char, std::enable_if_t<std::is_base_of<StrongTypedefBase, T>::value>> : fmt::formatter<typename T::BaseType> {
34  using underlying_type = typename T::BaseType;
35  using parent = typename fmt::formatter<underlying_type>;
36 
37  constexpr fmt::format_parse_context::iterator parse(fmt::format_parse_context &ctx)
38  {
39  return parent::parse(ctx);
40  }
41 
42  fmt::format_context::iterator format(const T &t, format_context &ctx) const
43  {
44  return parent::format(t.base(), ctx);
45  }
46 };
47 
48 #endif /* FORMAT_HPP */
Type (helpers) for making a strong typedef that is a distinct type.