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sprout/weed.hpp 追加

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bolero-MURAKAMI 2011-11-13 17:54:38 +09:00
parent 8103682fdb
commit ecfc2b297a
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sprout/weed/parser/char/char.hpp Normal file
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#ifndef SPROUT_WEED_PARSER_CHAR_CHAR_HPP
#define SPROUT_WEED_PARSER_CHAR_CHAR_HPP
#include <iterator>
#include <type_traits>
#include <sprout/config.hpp>
#include <sprout/iterator/next.hpp>
#include <sprout/weed/unused.hpp>
#include <sprout/weed/parser_result.hpp>
#include <sprout/weed/parser/parser_base.hpp>
#include <sprout/weed/parser/lit.hpp>
#include <sprout/weed/traits/type/is_char_type.hpp>
namespace sprout {
namespace weed {
//
// lit_char_p
//
template<typename T>
struct lit_char_p
: public sprout::weed::parser_base
{
public:
template<typename Context, typename Iterator>
struct attribute {
public:
typedef sprout::weed::unused type;
};
template<typename Context, typename Iterator>
struct result {
public:
typedef sprout::weed::parser_result<Iterator, typename attribute<Context, Iterator>::type> type;
};
private:
T t_;
public:
lit_char_p() = default;
SPROUT_CONSTEXPR explicit lit_char_p(T const& t)
: t_(t)
{}
template<typename Context, typename Iterator>
SPROUT_CONSTEXPR typename result<Context, Iterator>::type operator()(
Iterator first,
Iterator last,
Context const&
) const
{
typedef typename result<Context, Iterator>::type result_type;
typedef typename attribute<Context, Iterator>::type attribute_type;
typedef typename std::iterator_traits<Iterator>::value_type elem_type;
return first != last && *first == elem_type(t_)
? result_type(true, sprout::next(first), attribute_type())
: result_type(false, first, typename attribute<Context, Iterator>::type())
;
}
};
//
// lit_g
//
template<typename T>
struct lit_g::eval<
T,
typename std::enable_if<
sprout::weed::traits::is_char_type<T>::value
>::type
> {
public:
typedef sprout::weed::lit_char_p<T> result_type;
public:
SPROUT_CONSTEXPR result_type operator()(T const& t) const {
return result_type(t);
}
};
//
// char_p
//
template<typename T>
struct char_p
: public sprout::weed::parser_base
{
public:
template<typename Context, typename Iterator>
struct attribute {
public:
typedef typename std::iterator_traits<Iterator>::value_type type;
};
template<typename Context, typename Iterator>
struct result {
public:
typedef sprout::weed::parser_result<Iterator, typename attribute<Context, Iterator>::type> type;
};
private:
T t_;
public:
char_p() = default;
SPROUT_CONSTEXPR explicit char_p(T const& t)
: t_(t)
{}
template<typename Context, typename Iterator>
SPROUT_CONSTEXPR typename result<Context, Iterator>::type operator()(
Iterator first,
Iterator last,
Context const&
) const
{
typedef typename result<Context, Iterator>::type result_type;
typedef typename attribute<Context, Iterator>::type attribute_type;
typedef typename std::iterator_traits<Iterator>::value_type elem_type;
return first != last && *first == elem_type(t_)
? result_type(true, sprout::next(first), *first)
: result_type(false, first, attribute_type())
;
}
};
//
// any_char_p
//
struct any_char_p
: public sprout::weed::parser_base
{
public:
template<typename Context, typename Iterator>
struct attribute {
public:
typedef typename std::iterator_traits<Iterator>::value_type type;
};
template<typename Context, typename Iterator>
struct result {
public:
typedef sprout::weed::parser_result<Iterator, typename attribute<Context, Iterator>::type> type;
};
public:
template<typename Context, typename Iterator>
SPROUT_CONSTEXPR typename result<Context, Iterator>::type operator()(
Iterator first,
Iterator last,
Context const&
) const
{
typedef typename result<Context, Iterator>::type result_type;
typedef typename attribute<Context, Iterator>::type attribute_type;
return first != last
? result_type(true, sprout::next(first), *first)
: result_type(false, first, attribute_type())
;
}
template<typename T>
SPROUT_CONSTEXPR sprout::weed::char_p<T> operator()(T const& t) const {
return sprout::weed::char_p<T>(t);
}
};
//
// char_
//
SPROUT_STATIC_CONSTEXPR sprout::weed::any_char_p char_ = sprout::weed::any_char_p();
} // namespace weed
} // namespace sprout
#endif // #ifndef SPROUT_WEED_PARSER_CHAR_CHAR_HPP