98 lines
3.4 KiB
C++
98 lines
3.4 KiB
C++
/**
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This file is a part of rexy's general purpose library
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Copyright (C) 2022 rexy712
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef REXY_DETAIL_FORMAT_CONTEXT_HANDLER_HPP
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#define REXY_DETAIL_FORMAT_CONTEXT_HANDLER_HPP
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#include <cstddef> //size_t
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#include "standard_types.hpp"
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#include "internal_types.hpp"
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#include "format_context.hpp"
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#include "parse_context.hpp"
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#include "format_args.hpp"
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#include "../../string_view.hpp"
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#include <locale> //locale
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namespace rexy::fmt::detail{
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//Holds the format and parse contexts and performs parse+format calls for replacement fields
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template<class Char>
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struct format_handler
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{
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public:
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using char_type = Char;
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using fmt_ctx_t = fmt_context_t<char_type>;
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using parse_ctx_t = parse_context_t<char_type>;
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using out_it_t = output_iterator_t<char_type>;
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using fmt_it_t = typename parse_ctx_t::iterator;
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using handle_t = typename basic_format_arg<fmt_ctx_t>::handle;
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template<class T>
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using fmter_t = typename fmt_ctx_t::template formatter_type<T>;
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public:
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fmt_ctx_t fmt_ctx;
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parse_ctx_t parse_ctx;
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public:
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format_handler(out_it_t output, basic_string_view<char_type> fmt, basic_format_args<fmt_ctx_t> args);
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format_handler(out_it_t output, basic_string_view<char_type> fmt, basic_format_args<fmt_ctx_t> args, const std::locale& l);
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constexpr fmt_it_t do_raw(fmt_it_t start, fmt_it_t fin);
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constexpr fmt_it_t do_format_spec(fmt_it_t start, fmt_it_t fin, std::size_t id);
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constexpr fmt_it_t do_empty_format(fmt_it_t start, fmt_it_t last, std::size_t id);
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constexpr std::size_t on_arg_id(void);
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constexpr std::size_t on_arg_id(std::size_t i);
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constexpr std::size_t on_arg_id(fmt_it_t start, fmt_it_t last);
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};
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template<class Char>
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format_handler(output_iterator_t<Char>, basic_string_view<Char>, basic_format_args<fmt_context_t<Char>>) -> format_handler<Char>;
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//Constant-evaluated version of format_handler. Does not perform formatting but will complete a parsing
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//pass during compile
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template<class Char, class... Args>
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class format_checker
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{
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public:
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using char_type = Char;
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using parse_ctx_t = parse_context_t<char_type>;
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using fmt_it_t = typename parse_ctx_t::iterator;
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parse_ctx_t parse_ctx;
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consteval format_checker(void) = default;
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consteval format_checker(basic_string_view<char_type> fmt, std::size_t numargs = 0);
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constexpr fmt_it_t do_raw(fmt_it_t, fmt_it_t last);
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constexpr fmt_it_t do_format_spec(fmt_it_t start, fmt_it_t last, std::size_t id);
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constexpr void do_empty_format(fmt_it_t, fmt_it_t, std::size_t);
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constexpr std::size_t on_arg_id(void);
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constexpr std::size_t on_arg_id(std::size_t i);
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constexpr std::size_t on_arg_id(fmt_it_t start, fmt_it_t last);
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private:
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template<std::size_t I, class FArg, class... FArgs>
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constexpr fmt_it_t do_format_spec_impl(fmt_it_t start, fmt_it_t last, std::size_t id);
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};
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}
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#endif
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