mirror of
https://github.com/bolero-MURAKAMI/Sprout.git
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89 lines
2.9 KiB
C++
89 lines
2.9 KiB
C++
#ifndef SPROUT_OPERATION_FIXED_ERASE_HPP
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#define SPROUT_OPERATION_FIXED_ERASE_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/fixed_container/traits.hpp>
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#include <sprout/fixed_container/functions.hpp>
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#include HDR_ITERATOR_SSCRISK_CEL_OR_SPROUT_DETAIL
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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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// erase
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//
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template<typename Container>
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struct erase {
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static_assert(sprout::fixed_container_traits<Container>::fixed_size >= 1, "fixed_size >= 1");
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public:
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typedef typename sprout::rebind_fixed_size<
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Container
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>::template apply<
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sprout::fixed_container_traits<Container>::fixed_size - 1
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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, std::ptrdiff_t... Indexes>
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SPROUT_CONSTEXPR inline Result erase_impl(
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Container const& cont,
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sprout::index_tuple<Indexes...>,
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typename sprout::fixed_container_traits<Container>::difference_type pos
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)
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{
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return sprout::remake_clone<Result, Container>(
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cont,
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sprout::size(cont) - 1,
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(Indexes < sprout::fixed_container_traits<Container>::fixed_size - 1
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? (Indexes < pos
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? *(sprout::fixed_begin(cont) + Indexes)
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: *(sprout::fixed_begin(cont) + Indexes + 1)
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)
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: typename sprout::fixed_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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// erase
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//
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template<typename Container>
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SPROUT_CONSTEXPR inline typename sprout::fixed::result_of::erase<Container>::type erase(
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Container const& cont,
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typename sprout::fixed_container_traits<Container>::const_iterator pos
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)
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{
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return sprout::fixed::detail::erase_impl<typename sprout::fixed::result_of::erase<Container>::type>(
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cont,
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typename sprout::index_range<0, sprout::fixed_container_traits<typename sprout::fixed::result_of::erase<Container>::type>::fixed_size>::type(),
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NS_SSCRISK_CEL_OR_SPROUT_DETAIL::distance(sprout::fixed_begin(cont), pos)
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);
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}
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//
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// erase
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//
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template<typename Container>
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SPROUT_CONSTEXPR inline typename sprout::fixed::result_of::erase<Container>::type erase(
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Container const& cont,
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typename sprout::fixed_container_traits<Container>::difference_type pos
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)
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{
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return sprout::fixed::detail::erase_impl<typename sprout::fixed::result_of::erase<Container>::type>(
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cont,
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typename sprout::index_range<0, sprout::fixed_container_traits<typename sprout::fixed::result_of::erase<Container>::type>::fixed_size>::type(),
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NS_SSCRISK_CEL_OR_SPROUT_DETAIL::distance(sprout::fixed_begin(cont), sprout::begin(cont) + pos)
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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::erase;
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} // namespace result_of
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using sprout::fixed::erase;
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} // namespace sprout
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#endif // #ifndef SPROUT_OPERATION_FIXED_ERASE_HPP
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