mirror of
https://github.com/bolero-MURAKAMI/Sprout.git
synced 2024-12-25 21:35:41 +00:00
97 lines
3.2 KiB
C++
97 lines
3.2 KiB
C++
/*=============================================================================
|
|
Copyright (c) 2011-2013 Bolero MURAKAMI
|
|
https://github.com/bolero-MURAKAMI/Sprout
|
|
|
|
Distributed under the Boost Software License, Version 1.0. (See accompanying
|
|
file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
|
|
=============================================================================*/
|
|
#ifndef SPROUT_WEED_PARSER_DIRECTIVE_AS_TUPLE_HPP
|
|
#define SPROUT_WEED_PARSER_DIRECTIVE_AS_TUPLE_HPP
|
|
|
|
#include <cstddef>
|
|
#include <sprout/config.hpp>
|
|
#include <sprout/tuple/tuple.hpp>
|
|
#include <sprout/type_traits/identity.hpp>
|
|
#include <sprout/weed/parser_result.hpp>
|
|
#include <sprout/weed/expr/make_terminal_or_expr.hpp>
|
|
#include <sprout/weed/expr/eval.hpp>
|
|
#include <sprout/weed/parser/parser_base.hpp>
|
|
#include <sprout/weed/traits/type/is_unused.hpp>
|
|
#include <sprout/weed/traits/expr/terminal_or_expr_of.hpp>
|
|
#include <sprout/weed/traits/parser/attribute_of.hpp>
|
|
|
|
namespace sprout {
|
|
namespace weed {
|
|
//
|
|
// as_tuple_p
|
|
//
|
|
template<typename Parser>
|
|
struct as_tuple_p
|
|
: public sprout::weed::parser_base
|
|
{
|
|
public:
|
|
template<typename Context, typename Iterator>
|
|
struct attribute {
|
|
private:
|
|
typedef typename sprout::weed::traits::attribute_of<Parser, Iterator, Context>::type attr_type;
|
|
private:
|
|
static_assert(!sprout::weed::traits::is_unused<attr_type>::value, "invalid attribute : unused");
|
|
public:
|
|
typedef sprout::tuples::tuple<attr_type> type;
|
|
};
|
|
template<typename Context, typename Iterator>
|
|
struct result
|
|
: public sprout::identity<sprout::weed::parser_result<Iterator, typename attribute<Context, Iterator>::type> >
|
|
{};
|
|
private:
|
|
typedef typename sprout::weed::traits::terminal_or_expr_of<Parser>::type expr_type;
|
|
private:
|
|
expr_type expr_;
|
|
private:
|
|
template<typename Context, typename Iterator, typename Result>
|
|
SPROUT_CONSTEXPR typename result<Context, Iterator>::type call(
|
|
Iterator first,
|
|
Result const& res
|
|
) const
|
|
{
|
|
typedef typename result<Context, Iterator>::type result_type;
|
|
typedef typename attribute<Context, Iterator>::type attribute_type;
|
|
return res.success()
|
|
? result_type(true, res.current(), attribute_type(res.attr()))
|
|
: result_type(false, first, attribute_type())
|
|
;
|
|
}
|
|
public:
|
|
as_tuple_p() = default;
|
|
explicit SPROUT_CONSTEXPR as_tuple_p(
|
|
Parser const& p
|
|
)
|
|
: expr_(sprout::weed::make_terminal_or_expr(p))
|
|
{}
|
|
template<typename Context, typename Iterator>
|
|
SPROUT_CONSTEXPR typename result<Context, Iterator>::type operator()(
|
|
Iterator first, Iterator,
|
|
Context const& ctx
|
|
) const
|
|
{
|
|
return call<Context>(first, sprout::weed::eval(expr_, ctx));
|
|
}
|
|
};
|
|
//
|
|
// as_tuple_d
|
|
//
|
|
struct as_tuple_d {
|
|
public:
|
|
template<typename Parser>
|
|
SPROUT_CONSTEXPR sprout::weed::as_tuple_p<Parser> operator[](Parser const& p) const {
|
|
return sprout::weed::as_tuple_p<Parser>(p);
|
|
}
|
|
};
|
|
//
|
|
// as_tuple
|
|
//
|
|
SPROUT_CONSTEXPR sprout::weed::as_tuple_d as_tuple = sprout::weed::as_tuple_d();
|
|
} // namespace weed
|
|
} // namespace sprout
|
|
|
|
#endif // #ifndef SPROUT_WEED_PARSER_DIRECTIVE_AS_TUPLE_HPP
|