mirror of
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128 lines
4 KiB
C++
128 lines
4 KiB
C++
/*=============================================================================
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Copyright (c) 2011-2013 Bolero MURAKAMI
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https://github.com/bolero-MURAKAMI/Sprout
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Distributed under the Boost Software License, Version 1.0. (See accompanying
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file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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=============================================================================*/
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#ifndef SPROUT_RANGE_ADAPTOR_REPLACED_HPP
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#define SPROUT_RANGE_ADAPTOR_REPLACED_HPP
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#include <type_traits>
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#include <sprout/config.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/transform_iterator.hpp>
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#include <sprout/iterator/replace_iterator.hpp>
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#include <sprout/range/adaptor/detail/adapted_range_default.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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namespace sprout {
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namespace adaptors {
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//
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// replaced_range
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//
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template<typename Range>
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class replaced_range
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: public sprout::adaptors::detail::adapted_range_default<
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Range,
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sprout::transform_iterator<
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sprout::replace_value<typename sprout::container_traits<Range>::value_type>,
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typename sprout::container_traits<Range>::iterator
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>
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>
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{
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public:
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typedef sprout::adaptors::detail::adapted_range_default<
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Range,
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sprout::transform_iterator<
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sprout::replace_value<typename sprout::container_traits<Range>::value_type>,
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typename sprout::container_traits<Range>::iterator
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>
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> base_type;
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typedef typename base_type::range_type range_type;
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typedef typename base_type::iterator iterator;
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typedef typename base_type::value_type value_type;
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public:
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replaced_range() = default;
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replaced_range(replaced_range const&) = default;
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SPROUT_CONSTEXPR replaced_range(range_type& range, value_type const& old_value, value_type const& new_value)
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: base_type(
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iterator(sprout::begin(range), typename iterator::functor_type(old_value, new_value)),
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iterator(sprout::end(range), typename iterator::functor_type(old_value, new_value))
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)
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{}
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};
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//
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// replace_holder
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//
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template<typename T>
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class replace_holder {
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public:
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typedef T value_type;
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private:
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value_type old_;
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value_type new_;
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public:
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SPROUT_CONSTEXPR replace_holder(value_type const& old_value, value_type const& new_value)
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: old_(old_value)
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, new_(new_value)
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{}
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SPROUT_CONSTEXPR value_type const& old_value() const {
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return old_;
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}
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SPROUT_CONSTEXPR value_type const& new_value() const {
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return new_;
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}
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};
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//
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// replaced_forwarder
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//
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class replaced_forwarder {
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public:
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template<typename T>
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SPROUT_CONSTEXPR sprout::adaptors::replace_holder<T>
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operator()(T const& old_value, T const& new_value) const {
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return sprout::adaptors::replace_holder<T>(old_value, new_value);
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}
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};
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//
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// replaced
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//
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namespace {
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SPROUT_STATIC_CONSTEXPR sprout::adaptors::replaced_forwarder replaced = {};
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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 T>
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inline SPROUT_CONSTEXPR sprout::adaptors::replaced_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::replace_holder<T> const& rhs) {
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return sprout::adaptors::replaced_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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rhs.old_value(),
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rhs.new_value()
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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::replaced_range<Range> >
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: public sprout::container_construct_traits<typename sprout::adaptors::replaced_range<Range>::base_type>
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{};
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} // namespace sprout
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#endif // #ifndef SPROUT_RANGE_ADAPTOR_REPLACED_HPP
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