mirror of
https://github.com/bolero-MURAKAMI/Sprout.git
synced 2024-11-14 10:39:05 +00:00
91 lines
2.8 KiB
C++
91 lines
2.8 KiB
C++
#ifndef SPROUT_WEED_PARSER_DIRECTIVE_AS_ARRAY_HPP
|
|
#define SPROUT_WEED_PARSER_DIRECTIVE_AS_ARRAY_HPP
|
|
|
|
#include <cstddef>
|
|
#include <sprout/config.hpp>
|
|
#include <sprout/array.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_array_p
|
|
//
|
|
template<typename Parser>
|
|
struct as_array_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::array<attr_type, 1> type;
|
|
};
|
|
template<typename Context, typename Iterator>
|
|
struct result {
|
|
public:
|
|
typedef sprout::weed::parser_result<Iterator, typename attribute<Context, Iterator>::type> 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_array_p() = default;
|
|
SPROUT_CONSTEXPR explicit as_array_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 last,
|
|
Context const& ctx
|
|
) const
|
|
{
|
|
return call<Context>(first, sprout::weed::eval(expr_, ctx));
|
|
}
|
|
};
|
|
//
|
|
// as_array_d
|
|
//
|
|
struct as_array_d {
|
|
public:
|
|
template<typename Parser>
|
|
SPROUT_CONSTEXPR sprout::weed::as_array_p<Parser> operator[](Parser const& p) const {
|
|
return sprout::weed::as_array_p<Parser>(p);
|
|
}
|
|
};
|
|
//
|
|
// as_array
|
|
//
|
|
SPROUT_CONSTEXPR sprout::weed::as_array_d as_array = sprout::weed::as_array_d();
|
|
} // namespace weed
|
|
} // namespace sprout
|
|
|
|
#endif // #ifndef SPROUT_WEED_PARSER_DIRECTIVE_AS_ARRAY_HPP
|