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https://github.com/bolero-MURAKAMI/Sprout.git
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108 lines
3.4 KiB
C++
108 lines
3.4 KiB
C++
#ifndef SPROUT_ALGORITHM_STRING_JOIN_HPP
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#define SPROUT_ALGORITHM_STRING_JOIN_HPP
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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/operation/fixed/append_back.hpp>
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namespace sprout {
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namespace algorithm {
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namespace result_of {
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//
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// join
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//
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template<typename ContainerContainer, typename Separator>
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struct join {
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public:
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typedef typename sprout::rebind_fixed_size<
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typename sprout::fixed_container_traits<ContainerContainer>::value_type
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>::template apply<
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sprout::fixed_container_traits<ContainerContainer>::fixed_size != 0
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? (
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sprout::fixed_container_traits<
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typename sprout::fixed_container_traits<ContainerContainer>::value_type
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>::fixed_size
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+ (sprout::fixed_container_traits<ContainerContainer>::fixed_size - 1) * (
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sprout::fixed_container_traits<Separator>::fixed_size
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+ sprout::fixed_container_traits<
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typename sprout::fixed_container_traits<ContainerContainer>::value_type
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>::fixed_size
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)
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)
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: 0
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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 ContainerIterator, typename Separator, typename Container>
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SPROUT_CONSTEXPR inline typename std::enable_if<
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(sprout::fixed_container_traits<Container>::fixed_size == sprout::fixed_container_traits<Result>::fixed_size),
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Result
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>::type join_impl_1(
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ContainerIterator first,
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ContainerIterator last,
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Separator const& separator,
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Container const& current
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)
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{
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return current;
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}
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template<typename Result, typename ContainerIterator, typename Separator, typename Container>
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SPROUT_CONSTEXPR inline typename std::enable_if<
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(sprout::fixed_container_traits<Container>::fixed_size < sprout::fixed_container_traits<Result>::fixed_size),
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Result
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>::type join_impl_1(
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ContainerIterator first,
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ContainerIterator last,
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Separator const& separator,
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Container const& current
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)
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{
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return sprout::algorithm::detail::join_impl_1<Result>(
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sprout::next(first),
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last,
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separator,
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sprout::fixed::append_back(sprout::fixed::append_back(current, separator), *first)
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);
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}
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template<typename Result, typename ContainerIterator, typename Separator>
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SPROUT_CONSTEXPR inline Result join_impl(
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ContainerIterator first,
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ContainerIterator last,
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Separator const& separator
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)
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{
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return first != last
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? sprout::algorithm::detail::join_impl_1<Result>(
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sprout::next(first),
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last,
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separator,
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*first
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)
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: sprout::make_clone<Result>()
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;
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}
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} // namespace detail
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//
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// join
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//
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template<typename ContainerContainer, typename Separator>
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SPROUT_CONSTEXPR inline typename sprout::algorithm::result_of::join<ContainerContainer, Separator>::type join(
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ContainerContainer const& cont_cont,
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Separator const& separator
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)
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{
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return sprout::algorithm::detail::join_impl<typename sprout::algorithm::result_of::join<ContainerContainer, Separator>::type>(
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sprout::begin(cont_cont),
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sprout::end(cont_cont),
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separator
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);
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}
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} // namespace algorithm
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} // namespace sprout
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#endif // #ifndef SPROUT_ALGORITHM_STRING_JOIN_HPP
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