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add weed parser: char_(f, l)

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This commit is contained in:
bolero-MURAKAMI 2013-05-21 19:56:41 +09:00
parent e6420f2bbd
commit ab096d442c
5 changed files with 167 additions and 21 deletions
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55
sprout/weed/parser/char/char.hpp
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@ -111,6 +111,47 @@ namespace sprout {
}
};
//
// char_range_p
//
template<typename T>
struct char_range_p
: public sprout::weed::parser_base
{
public:
template<typename Context, typename Iterator>
struct attribute
: public sprout::identity<typename std::iterator_traits<Iterator>::value_type>
{};
template<typename Context, typename Iterator>
struct result
: public sprout::identity<sprout::weed::parser_result<Iterator, typename attribute<Context, Iterator>::type> >
{};
private:
T f_;
T l_;
public:
char_range_p() = default;
SPROUT_CONSTEXPR char_range_p(T const& f, T const& l)
: f_(f), l_(l)
{}
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(f_) && *first <= elem_type(l_)
? result_type(true, sprout::next(first), *first)
: result_type(false, first, attribute_type())
;
}
};
//
// any_char_p
//
@ -142,9 +183,21 @@ namespace sprout {
;
}
template<typename T>
SPROUT_CONSTEXPR sprout::weed::char_p<T> operator()(T const& t) const {
SPROUT_CONSTEXPR typename std::enable_if<
sprout::weed::traits::is_char_type<T>::value,
sprout::weed::char_p<T>
>::type
operator()(T const& t) const {
return sprout::weed::char_p<T>(t);
}
template<typename T>
SPROUT_CONSTEXPR typename std::enable_if<
sprout::weed::traits::is_char_type<T>::value,
sprout::weed::char_range_p<T>
>::type
operator()(T const& f, T const& l) const {
return sprout::weed::char_range_p<T>(f, l);
}
};
//
// char_