mirror of
https://github.com/bolero-MURAKAMI/Sprout.git
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100 lines
2.9 KiB
C++
100 lines
2.9 KiB
C++
#ifndef SPROUT_OPERATION_FIXED_RESIZE_HPP
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#define SPROUT_OPERATION_FIXED_RESIZE_HPP
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#include <cstddef>
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#include <sprout/config.hpp>
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#include <sprout/index_tuple.hpp>
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#include <sprout/container/traits.hpp>
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#include <sprout/container/functions.hpp>
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#include <sprout/iterator/operation.hpp>
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namespace sprout {
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namespace fixed {
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namespace result_of {
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//
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// resize
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//
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template<std::size_t N, typename Container>
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struct resize {
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public:
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typedef typename sprout::container_transform_traits<
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Container
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>::template rebind_size<
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N
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>::type type;
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};
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} // namespace result_of
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namespace detail {
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template<typename Result, typename Container, typename T, sprout::index_t... Indexes>
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inline SPROUT_CONSTEXPR Result resize_impl(
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Container const& cont,
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sprout::index_tuple<Indexes...>,
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typename sprout::container_traits<Result>::difference_type size,
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T const& v
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)
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{
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return sprout::make<Result>(
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(Indexes < size
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? *sprout::next(sprout::begin(cont), Indexes)
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: v
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)...
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);
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}
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} // namespace detail
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//
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// resize
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//
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template<std::size_t N, typename Container, typename T>
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inline SPROUT_CONSTEXPR typename sprout::fixed::result_of::resize<N, Container>::type resize(
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Container const& cont,
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T const& v
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)
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{
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return sprout::fixed::detail::resize_impl<typename sprout::fixed::result_of::resize<N, Container>::type>(
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cont,
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typename sprout::index_range<0, sprout::container_traits<typename sprout::fixed::result_of::resize<N, Container>::type>::static_size>::type(),
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sprout::size(cont),
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v
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);
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}
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namespace detail {
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template<typename Result, typename Container, sprout::index_t... Indexes>
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inline SPROUT_CONSTEXPR Result resize_impl(
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Container const& cont,
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sprout::index_tuple<Indexes...>,
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typename sprout::container_traits<Result>::difference_type size
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)
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{
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return sprout::make<Result>(
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(Indexes < size
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? *sprout::next(sprout::begin(cont), Indexes)
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: typename sprout::container_traits<Result>::value_type()
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)...
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);
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}
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} // namespace detail
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//
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// resize
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//
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template<std::size_t N, typename Container>
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inline SPROUT_CONSTEXPR typename sprout::fixed::result_of::resize<N, Container>::type resize(
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Container const& cont
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)
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{
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return sprout::fixed::detail::resize_impl<typename sprout::fixed::result_of::resize<N, Container>::type>(
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cont, typename sprout::index_range<0, sprout::container_traits<typename sprout::fixed::result_of::resize<N, Container>::type>::static_size>::type(),
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sprout::size(cont)
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);
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}
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} // namespace fixed
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namespace result_of {
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using sprout::fixed::result_of::resize;
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} // namespace result_of
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using sprout::fixed::resize;
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} // namespace sprout
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#endif // #ifndef SPROUT_OPERATION_FIXED_RESIZE_HPP
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