mirror of
https://github.com/bolero-MURAKAMI/Sprout
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72 lines
2.2 KiB
C++
72 lines
2.2 KiB
C++
#ifndef SPROUT_WEED_CONTEXT_PARSE_CONTEXT_TERMINAL_PARSER_HPP
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#define SPROUT_WEED_CONTEXT_PARSE_CONTEXT_TERMINAL_PARSER_HPP
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#include <type_traits>
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#include <sprout/config.hpp>
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#include <sprout/tuple/tuple.hpp>
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#include <sprout/weed/eval_result.hpp>
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#include <sprout/weed/expr/tag.hpp>
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#include <sprout/weed/traits/type/is_char_type.hpp>
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#include <sprout/weed/traits/type/is_string.hpp>
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#include <sprout/weed/traits/expr/tag_of.hpp>
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#include <sprout/weed/traits/parser/attribute_of.hpp>
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#include <sprout/weed/context/parse_context_fwd.hpp>
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namespace sprout {
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namespace weed {
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//
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// parse_context::eval
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//
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template<typename Iterator>
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template<typename Expr>
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struct parse_context<Iterator>::eval<
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Expr,
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typename std::enable_if<
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std::is_same<
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typename sprout::weed::traits::tag_of<Expr>::type,
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sprout::weed::tag::terminal
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>::value
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&& !sprout::weed::traits::is_char_type<
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typename sprout::tuples::tuple_element<0, typename Expr::args_type>::type
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>::value
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&& !sprout::weed::traits::is_string<
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typename sprout::tuples::tuple_element<0, typename Expr::args_type>::type
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>::value
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>::type
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> {
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private:
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typedef sprout::weed::parse_context<Iterator> context_type;
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typedef typename sprout::tuples::tuple_element<0, typename Expr::args_type>::type parser_type;
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public:
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typedef typename sprout::weed::traits::attribute_of<
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parser_type,
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Iterator,
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context_type
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>::type attribute_type;
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typedef sprout::weed::eval_result<context_type, Iterator, attribute_type> result_type;
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private:
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template<typename Result>
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SPROUT_CONSTEXPR result_type call(
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Result const& res,
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context_type const& ctx
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) const
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{
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return result_type(res, context_type(ctx, res.current()));
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}
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public:
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SPROUT_CONSTEXPR result_type operator()(
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Expr const& expr,
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context_type const& ctx
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) const
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{
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return call(
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sprout::tuples::get<0>(expr.args())
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.template operator()(ctx.begin(), ctx.end(), ctx),
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ctx
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);
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}
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};
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} // namespace weed
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} // namespace sprout
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#endif // #ifndef SPROUT_WEED_CONTEXT_PARSE_CONTEXT_TERMINAL_PARSER_HPP
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