Sprout/sprout/algorithm/fixed/generate.hpp
bolero-MURAKAMI 73ead93fe5 destructive change sprout::generate -> sprout::unfold
add range adapter reversed, replaced, filtered
2012-09-21 15:43:30 +09:00

87 lines
3.2 KiB
C++

#ifndef SPROUT_ALGORITHM_FIXED_GENERATE_HPP
#define SPROUT_ALGORITHM_FIXED_GENERATE_HPP
#include <type_traits>
#include <sprout/config.hpp>
#include <sprout/container/traits.hpp>
#include <sprout/container/functions.hpp>
#include <sprout/algorithm/fixed/result_of.hpp>
#include <sprout/generator/functions.hpp>
#include <sprout/detail/container_complate.hpp>
#include HDR_ITERATOR_SSCRISK_CEL_OR_SPROUT
namespace sprout {
namespace fixed {
namespace detail {
template<typename Container, typename Gen, typename... Args>
inline SPROUT_CONSTEXPR typename std::enable_if<
sprout::container_traits<Container>::static_size == sizeof...(Args) + 1,
typename sprout::fixed::result_of::algorithm<Container>::type
>::type generate_impl_1(
Container const& cont, Gen const& gen,
typename sprout::container_traits<Container>::size_type size,
Args const&... args
)
{
return sprout::remake<Container>(cont, size, args..., sprout::generators::generated_value(gen));
}
template<typename Container, typename Gen, typename... Args>
inline SPROUT_CONSTEXPR typename std::enable_if<
sprout::container_traits<Container>::static_size != sizeof...(Args) + 1,
typename sprout::fixed::result_of::algorithm<Container>::type
>::type
generate_impl_1(
Container const& cont, Gen const& gen,
typename sprout::container_traits<Container>::size_type size,
Args const&... args
)
{
return sizeof...(Args) + 1 < size
? sprout::fixed::detail::generate_impl_1(
cont, sprout::generators::next_generator(gen)(), size,
args..., sprout::generators::generated_value(gen)
)
: sprout::detail::container_complate(cont, args..., sprout::generators::generated_value(gen))
;
}
template<typename Container, typename Generator>
inline SPROUT_CONSTEXPR typename std::enable_if<
sprout::container_traits<Container>::static_size == 0,
typename sprout::fixed::result_of::algorithm<Container>::type
>::type generate_impl(
Container const& cont, Generator gen,
typename sprout::container_traits<Container>::size_type size
)
{
return sprout::remake<Container>(cont, size);
}
template<typename Container, typename Generator>
inline SPROUT_CONSTEXPR typename std::enable_if<
sprout::container_traits<Container>::static_size != 0,
typename sprout::fixed::result_of::algorithm<Container>::type
>::type
generate_impl(
Container const& cont, Generator gen,
typename sprout::container_traits<Container>::size_type size
)
{
return size != 0
? sprout::fixed::detail::generate_impl_1(cont, gen(), size)
: sprout::detail::container_complate(cont)
;
}
} // namespace detail
//
// generate
//
template<typename Container, typename Generator>
inline SPROUT_CONSTEXPR typename sprout::fixed::result_of::algorithm<Container>::type
generate(Container const& cont, Generator gen) {
return sprout::fixed::detail::generate_impl(cont, gen, sprout::size(cont));
}
} // namespace fixed
using sprout::fixed::generate;
} // namespace sprout
#endif // #ifndef SPROUT_ALGORITHM_FIXED_GENERATE_HPP