mirror of
https://github.com/bolero-MURAKAMI/Sprout.git
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197 lines
7.7 KiB
C++
197 lines
7.7 KiB
C++
#ifndef SPROUT_ALGORITHM_FIXED_GENERATE_HPP
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#define SPROUT_ALGORITHM_FIXED_GENERATE_HPP
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#include <cstddef>
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#include <type_traits>
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#include <sprout/config.hpp>
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#include <sprout/fixed_container/traits.hpp>
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#include <sprout/fixed_container/functions.hpp>
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#include <sprout/iterator/operation.hpp>
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#include <sprout/algorithm/fixed/result_of.hpp>
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namespace sprout {
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namespace fixed {
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namespace detail {
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template<std::size_t InitSize, typename Container, typename Generator, typename Head, typename... Args>
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SPROUT_CONSTEXPR inline typename std::enable_if<
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InitSize == sizeof...(Args) + 1,
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typename sprout::fixed_container_traits<Container>::value_type
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>::type call_gen(
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Generator gen,
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Head const& head,
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Args const&... args
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)
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{
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return gen(head, args...);
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}
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template<std::size_t InitSize, typename Container, typename Generator, typename Head, typename... Args>
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SPROUT_CONSTEXPR inline typename std::enable_if<
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InitSize != sizeof...(Args) + 1,
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typename sprout::fixed_container_traits<Container>::value_type
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>::type call_gen(
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Generator gen,
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Head const& head,
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Args const&... args
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)
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{
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return call_gen<InitSize, Container>(gen, args...);
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}
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template<typename Container, typename... Args>
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SPROUT_CONSTEXPR inline typename std::enable_if<
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sprout::fixed_container_traits<Container>::fixed_size == sizeof...(Args),
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typename sprout::fixed::result_of::algorithm<Container>::type
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>::type generate_impl_4(
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Container const& cont,
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Args const&... args
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)
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{
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return sprout::remake_clone<Container, Container>(cont, sprout::size(cont), args...);
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}
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template<typename Container, typename... Args>
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SPROUT_CONSTEXPR inline typename std::enable_if<
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sprout::fixed_container_traits<Container>::fixed_size != sizeof...(Args),
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typename sprout::fixed::result_of::algorithm<Container>::type
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>::type generate_impl_4(
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Container const& cont,
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Args const&... args
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)
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{
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return generate_impl_4(cont, args..., *sprout::next(sprout::fixed_begin(cont), sizeof...(Args)));
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}
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template<std::size_t InitSize, typename Container, typename Generator, typename... Args>
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SPROUT_CONSTEXPR inline typename std::enable_if<
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sprout::fixed_container_traits<Container>::fixed_size == sizeof...(Args),
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typename sprout::fixed::result_of::algorithm<Container>::type
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>::type generate_impl_3(
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Container const& cont,
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Generator gen,
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typename sprout::fixed_container_traits<Container>::difference_type offset,
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Args const&... args
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)
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{
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return sprout::remake_clone<Container, Container>(cont, sprout::size(cont), args...);
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}
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template<std::size_t InitSize, typename Container, typename Generator, typename... Args>
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SPROUT_CONSTEXPR inline typename std::enable_if<
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sprout::fixed_container_traits<Container>::fixed_size != sizeof...(Args),
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typename sprout::fixed::result_of::algorithm<Container>::type
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>::type generate_impl_3(
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Container const& cont,
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Generator gen,
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typename sprout::fixed_container_traits<Container>::difference_type offset,
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Args const&... args
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)
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{
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return sizeof...(Args) < static_cast<std::size_t>(offset)
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? generate_impl_3<InitSize>(cont, gen, offset, args..., call_gen<InitSize, Container>(gen, args...))
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: generate_impl_4(cont, args...)
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;
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}
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template<typename Container, typename Head, typename... Args>
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SPROUT_CONSTEXPR inline typename std::enable_if<
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sizeof...(Args) == 0,
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typename sprout::fixed::result_of::algorithm<Container>::type
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>::type generate_impl_2_drop(
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Container const& cont,
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typename sprout::fixed_container_traits<Container>::size_type dropped_size,
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Head const& head,
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Args const&... args
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)
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{
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return sprout::remake_clone<Container, Container>(cont, sprout::size(cont), args...);
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}
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template<typename Container, typename Head, typename... Args>
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SPROUT_CONSTEXPR inline typename std::enable_if<
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sizeof...(Args) != 0,
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typename sprout::fixed::result_of::algorithm<Container>::type
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>::type generate_impl_2_drop(
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Container const& cont,
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typename sprout::fixed_container_traits<Container>::size_type dropped_size,
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Head const& head,
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Args const&... args
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)
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{
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return sizeof...(Args) + 1 != dropped_size
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? generate_impl_2_drop(cont, dropped_size, args...)
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: generate_impl_4(cont, head, args...)
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;
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}
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template<std::size_t InitSize, typename Container, typename Generator, typename Head, typename... Args>
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SPROUT_CONSTEXPR inline typename sprout::fixed::result_of::algorithm<Container>::type generate_impl_2(
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Container const& cont,
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Generator gen,
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typename sprout::fixed_container_traits<Container>::difference_type offset,
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typename sprout::fixed_container_traits<Container>::size_type size,
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std::size_t remain,
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Head const& head,
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Args const&... args
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)
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{
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return InitSize - remain != size
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? (remain > 1
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? generate_impl_2<InitSize>(cont, gen, offset, size, remain - 1, args..., head)
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: generate_impl_3<InitSize>(cont, gen, offset + size, args..., head)
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)
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: generate_impl_2_drop(cont, offset + size, head, args...)
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;
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}
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template<std::size_t InitSize, typename Container, typename Generator, typename... Args>
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SPROUT_CONSTEXPR inline typename std::enable_if<
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sprout::fixed_container_traits<Container>::fixed_size == sizeof...(Args),
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typename sprout::fixed::result_of::algorithm<Container>::type
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>::type generate_impl_1(
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Container const& cont,
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Generator gen,
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typename sprout::fixed_container_traits<Container>::difference_type offset,
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typename sprout::fixed_container_traits<Container>::size_type size,
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Args const&... args
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)
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{
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return generate_impl_2<InitSize>(cont, gen, offset, size, InitSize, args...);
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}
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template<std::size_t InitSize, typename Container, typename Generator, typename... Args>
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SPROUT_CONSTEXPR inline typename std::enable_if<
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sprout::fixed_container_traits<Container>::fixed_size != sizeof...(Args),
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typename sprout::fixed::result_of::algorithm<Container>::type
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>::type generate_impl_1(
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Container const& cont,
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Generator gen,
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typename sprout::fixed_container_traits<Container>::difference_type offset,
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typename sprout::fixed_container_traits<Container>::size_type size,
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Args const&... args
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)
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{
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return sizeof...(Args) - InitSize < static_cast<std::size_t>(offset)
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? generate_impl_1<InitSize>(cont, gen, offset, size, args..., *sprout::next(sprout::fixed_begin(cont), sizeof...(Args) - InitSize))
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: generate_impl_2<InitSize>(cont, gen, offset, size, InitSize, args...)
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;
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}
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template<typename Container, typename Generator, typename... Inits>
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SPROUT_CONSTEXPR inline typename sprout::fixed::result_of::algorithm<Container>::type generate_impl(
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Container const& cont,
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Generator gen,
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typename sprout::fixed_container_traits<Container>::size_type size,
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Inits const&... inits
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)
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{
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return generate_impl_1<sizeof...(Inits)>(cont, gen, sprout::fixed_begin_offset(cont), size, inits...);
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}
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} // namespace detail
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//
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// generate
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//
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template<typename Container, typename Generator, typename... Inits>
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SPROUT_CONSTEXPR inline typename sprout::fixed::result_of::algorithm<Container>::type generate(
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Container const& cont,
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Generator gen,
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Inits const&... inits
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)
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{
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return sprout::fixed::detail::generate_impl(cont, gen, sprout::size(cont), inits...);
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}
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} // namespace fixed
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using sprout::fixed::generate;
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} // namespace sprout
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#endif // #ifndef SPROUT_ALGORITHM_FIXED_GENERATE_HPP
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