mirror of
https://github.com/bolero-MURAKAMI/Sprout.git
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113 lines
3.3 KiB
C++
113 lines
3.3 KiB
C++
#ifndef SPROUT_RANGE_ADAPTOR_COPIED_HPP
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#define SPROUT_RANGE_ADAPTOR_COPIED_HPP
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#include <type_traits>
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#include <sprout/config.hpp>
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#include <sprout/pit.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/algorithm/fixed/result_of.hpp>
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#include <sprout/range/adaptor/detail/adapted_range_default.hpp>
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#include <sprout/range/algorithm/copy.hpp>
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#include <sprout/type_traits/lvalue_reference.hpp>
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#include <sprout/utility/forward.hpp>
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#include <sprout/utility/lvalue_forward.hpp>
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#include <sprout/utility/value_holder.hpp>
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namespace sprout {
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namespace adaptors {
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//
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// copied_range
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//
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template<typename Range>
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class copied_range
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: public sprout::adaptors::detail::adapted_range_default<Range>
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{
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public:
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typedef sprout::adaptors::detail::adapted_range_default<Range> base_type;
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typedef typename base_type::range_type range_type;
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public:
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copied_range() = default;
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copied_range(copied_range const&) = default;
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explicit SPROUT_CONSTEXPR copied_range(range_type& range)
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: base_type(
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sprout::begin(range),
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sprout::end(range)
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)
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{}
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template<typename Result>
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SPROUT_CONSTEXPR operator Result() const {
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return sprout::range::fixed::copy(*this, sprout::pit<Result>());
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}
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};
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//
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// copy_holder
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//
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template<typename Result>
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class copy_holder {
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public:
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typedef Result result_type;
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private:
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sprout::value_holder<result_type&> result_;
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public:
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copy_holder() = default;
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copy_holder(copy_holder const&) = default;
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explicit SPROUT_CONSTEXPR copy_holder(result_type& result)
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: result_(result)
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{}
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SPROUT_CONSTEXPR result_type const& result() const {
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return result_;
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}
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};
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//
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// copied_forwarder
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//
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class copied_forwarder {
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public:
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template<typename Result>
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SPROUT_CONSTEXPR typename sprout::adaptors::copy_holder<Result const>
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operator()(Result const& result) {
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return typename sprout::adaptors::copy_holder<Result const>(result);
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}
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};
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//
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// copied
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//
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namespace {
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SPROUT_STATIC_CONSTEXPR sprout::adaptors::copied_forwarder copied{};
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} // anonymous-namespace
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//
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// operator|
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//
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template<typename Range, typename Result>
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inline SPROUT_CONSTEXPR typename sprout::fixed::result_of::algorithm<Result>::type
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operator|(Range&& lhs, sprout::adaptors::copy_holder<Result> const& rhs) {
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return sprout::range::fixed::copy(sprout::lvalue_forward<Range>(lhs), rhs.result());
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}
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template<typename Range>
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inline SPROUT_CONSTEXPR sprout::adaptors::copied_range<
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typename std::remove_reference<typename sprout::lvalue_reference<Range>::type>::type
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>
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operator|(Range&& lhs, sprout::adaptors::copied_forwarder const& rhs) {
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return sprout::adaptors::copied_range<
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typename std::remove_reference<typename sprout::lvalue_reference<Range>::type>::type
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>(
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sprout::lvalue_forward<Range>(lhs)
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);
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}
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} // namespace adaptors
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//
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// container_construct_traits
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//
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template<typename Range>
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struct container_construct_traits<sprout::adaptors::copied_range<Range> >
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: public sprout::container_construct_traits<typename sprout::adaptors::copied_range<Range>::base_type>
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{};
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} // namespace sprout
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#endif // #ifndef SPROUT_RANGE_ADAPTOR_COPIED_HPP
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