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add component for stateful lib

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This commit is contained in:
bolero-MURAKAMI 2015-05-17 08:52:34 +09:00
parent b37695f1a4
commit fa619fc1bf
6 changed files with 426 additions and 131 deletions
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69
sprout/stateful/counter.hpp
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@ -9,15 +9,11 @@
#define SPROUT_STATEFUL_COUNTER_HPP
#include <sprout/config.hpp>
#include <sprout/workaround/std/cstddef.hpp>
#include <sprout/type_traits/integral_constant.hpp>
namespace sprout {
#ifndef SPROUT_CONFIG_DISABLE_CONSTEXPR
namespace detail {
SPROUT_STATIC_CONSTEXPR std::size_t counter_default_call_limit = 128;
} // namespace detail
namespace counter_detail {
#if defined(__GNUC__) && !defined(__clang__)
# pragma GCC diagnostic push
@ -43,63 +39,54 @@ namespace sprout {
friend SPROUT_CONSTEXPR int adl_counter(sprout::counter_detail::tag<N>) {
return N;
}
SPROUT_STATIC_CONSTEXPR int value = N - 1;
SPROUT_STATIC_CONSTEXPR int value = N;
};
template<int N>
SPROUT_CONSTEXPR_OR_CONST int sprout::counter_detail::state<N>::value;
template<>
struct state<1> {
friend SPROUT_CONSTEXPR int adl_counter(sprout::counter_detail::tag<1>) {
return 1;
}
static SPROUT_CONSTEXPR int value = 0;
};
SPROUT_CONSTEXPR_OR_CONST int sprout::counter_detail::state<1>::value;
template<int N, int R = adl_counter(sprout::counter_detail::tag<N>())>
SPROUT_CONSTEXPR int counter(
int, sprout::counter_detail::tag<N>
template<int N, int = adl_counter(sprout::counter_detail::tag<N>())>
SPROUT_CONSTEXPR bool check_impl(int, sprout::counter_detail::tag<N>) {
return true;
}
template<int N>
SPROUT_CONSTEXPR bool check_impl(long, sprout::counter_detail::tag<N>) {
return false;
}
template<int N>
SPROUT_CONSTEXPR bool check(bool R = sprout::counter_detail::check_impl(0, sprout::counter_detail::tag<N>())) {
return R;
}
template<int N>
SPROUT_CONSTEXPR int counter_impl(sprout::false_type, sprout::counter_detail::tag<N>) {
return 0;
}
template<int N>
SPROUT_CONSTEXPR int counter_impl(
sprout::true_type, sprout::counter_detail::tag<N>,
int R = !sprout::counter_detail::check<N>() ? N
: counter_impl(sprout::bool_constant<sprout::counter_detail::check<N>()>(), sprout::counter_detail::tag<N + 1>())
)
{
return R;
}
SPROUT_CONSTEXPR int counter(
long, sprout::counter_detail::tag<0>
)
{
return 0;
}
template<int N>
SPROUT_CONSTEXPR int counter(
long, sprout::counter_detail::tag<N>,
int R = counter(0, sprout::counter_detail::tag<N - 1>())
)
{
template<int N = 0>
SPROUT_CONSTEXPR int counter(int R = sprout::counter_detail::counter_impl(sprout::true_type(), sprout::counter_detail::tag<N>())) {
return R;
}
} // namespace counter_detail
//
// counter
// counter_before
//
template<
std::size_t Limit = sprout::detail::counter_default_call_limit,
int N = 1,
int R = sprout::counter_detail::state<
sprout::counter_detail::counter(0, sprout::counter_detail::tag<Limit>()) + 1
sprout::counter_detail::counter() + N - 1
>::value
>
SPROUT_CONSTEXPR int counter() {
return R;
}
template<
std::size_t Limit = sprout::detail::counter_default_call_limit,
int R = sprout::counter_detail::state<
sprout::counter_detail::counter(0, sprout::counter_detail::tag<Limit>())
>::value
>
SPROUT_CONSTEXPR int counter_before() {
return R;
}
#endif
} // namespace sprout