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sprout/weed/parser/numeric/* 更新

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bolero-MURAKAMI 2011-11-14 13:22:04 +09:00
parent 34e2c4d45a
commit ad94c0b247
11 changed files with 603 additions and 107 deletions
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157
sprout/weed/parser/numeric/uint_p.hpp Normal file
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#ifndef SPROUT_WEED_PARSER_NUMERIC_UINT_P_HPP
#define SPROUT_WEED_PARSER_NUMERIC_UINT_P_HPP
#include <cstddef>
#include <sprout/config.hpp>
#include <sprout/iterator/next.hpp>
#include <sprout/tuple/tuple.hpp>
#include <sprout/integer/integer_digits.hpp>
#include <sprout/weed/unused.hpp>
#include <sprout/weed/parser_result.hpp>
#include <sprout/weed/parser/parser_base.hpp>
#include <sprout/weed/detail/ndigits.hpp>
namespace sprout {
namespace weed {
//
// uint_p
//
template<
typename IntType,
std::size_t Radix,
std::size_t MinDigits = 1,
std::size_t MaxDigits = sprout::integer_digits<IntType, Radix>::value
>
struct uint_p
: public sprout::weed::parser_base
{
public:
template<typename Context, typename Iterator>
struct attribute {
public:
typedef IntType type;
};
template<typename Context, typename Iterator>
struct result {
public:
typedef sprout::weed::parser_result<Iterator, typename attribute<Context, Iterator>::type> type;
};
private:
template<std::size_t N, typename Context, typename Iterator, typename PResult>
SPROUT_CONSTEXPR typename std::enable_if<
N == MaxDigits,
typename result<Context, Iterator>::type
>::type call_1(
Iterator first,
Iterator last,
Iterator temp_first,
IntType t,
PResult const& res
) const
{
typedef typename result<Context, Iterator>::type result_type;
typedef typename attribute<Context, Iterator>::type attribute_type;
return sprout::tuples::get<1>(res)
? result_type(
true,
sprout::next(first),
static_cast<IntType>(t * Radix | sprout::tuples::get<0>(res))
)
: N < MinDigits
? result_type(false, temp_first, attribute_type())
: result_type(true, first, t)
;
}
template<std::size_t N, typename Context, typename Iterator, typename PResult>
SPROUT_CONSTEXPR typename std::enable_if<
N != MaxDigits,
typename result<Context, Iterator>::type
>::type call_1(
Iterator first,
Iterator last,
Iterator temp_first,
IntType t,
PResult const& res
) const
{
typedef typename result<Context, Iterator>::type result_type;
typedef typename attribute<Context, Iterator>::type attribute_type;
return sprout::tuples::get<1>(res)
? call_0<N, Context>(
sprout::next(first),
last, temp_first,
static_cast<IntType>(t * Radix | sprout::tuples::get<0>(res))
)
: N < MinDigits
? result_type(false, temp_first, attribute_type())
: result_type(true, first, t)
;
}
template<std::size_t N, typename Context, typename Iterator>
SPROUT_CONSTEXPR typename result<Context, Iterator>::type call_0(
Iterator first,
Iterator last,
Iterator temp_first,
IntType t
) const
{
typedef typename result<Context, Iterator>::type result_type;
typedef typename attribute<Context, Iterator>::type attribute_type;
return first != last
? call_1<N + 1, Context>(
first,
last,
temp_first,
t,
sprout::weed::detail::from_ndigit<Radix, IntType>(*first)
)
: N < MinDigits
? result_type(false, temp_first, attribute_type())
: result_type(true, first, t)
;
}
template<typename Context, typename Iterator, typename PResult>
SPROUT_CONSTEXPR typename result<Context, Iterator>::type call(
Iterator first,
Iterator last,
Iterator temp_first,
PResult const& res
) const
{
typedef typename result<Context, Iterator>::type result_type;
typedef typename attribute<Context, Iterator>::type attribute_type;
return sprout::tuples::get<1>(res)
? call_0<1, Context>(
sprout::next(first),
last,
temp_first,
sprout::tuples::get<0>(res)
)
: result_type(false, temp_first, attribute_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
? call<Context>(
first,
last,
first,
sprout::weed::detail::from_ndigit<Radix, IntType>(*first)
)
: result_type(false, first, attribute_type())
;
}
};
} // namespace weed
} // namespace sprout
#endif // #ifndef SPROUT_WEED_PARSER_NUMERIC_UINT_P_HPP