2012-09-21 06:43:30 +00:00
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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/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/iterator/transform_iterator.hpp>
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#include <sprout/range/range_container.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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namespace sprout {
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namespace adaptors {
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namespace detail {
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template<typename T>
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class replace_value {
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public:
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typedef T const& result_type;
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typedef T const& first_argument_type;
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private:
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T old_;
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T new_;
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public:
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SPROUT_CONSTEXPR replace_value(T const& old_value, T 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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2012-11-24 06:57:50 +00:00
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SPROUT_CONSTEXPR T operator()(T const& value) const {
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2012-09-21 06:43:30 +00:00
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return (value == old_) ? new_ : value;
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}
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};
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} // namespace detail
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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::range::range_container<
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sprout::transform_iterator<
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sprout::adaptors::detail::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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, public sprout::detail::container_nosy_static_size<Range>
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, public sprout::detail::container_nosy_fixed_size<Range>
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{
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public:
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typedef Range range_type;
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typedef sprout::range::range_container<
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sprout::transform_iterator<
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sprout::adaptors::detail::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::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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explicit 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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2012-11-24 06:57:50 +00:00
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SPROUT_CONSTEXPR value_type const& old_value() const {
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2012-09-21 06:43:30 +00:00
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return old_;
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}
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2012-11-24 06:57:50 +00:00
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SPROUT_CONSTEXPR value_type const& new_value() const {
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2012-09-21 06:43:30 +00:00
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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) {
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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:
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typedef typename sprout::container_construct_traits<Range>::copied_type copied_type;
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public:
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template<typename Cont>
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static SPROUT_CONSTEXPR copied_type deep_copy(Cont&& cont) {
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return sprout::range::fixed::copy(sprout::forward<Cont>(cont), sprout::pit<copied_type>());
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}
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template<typename... Args>
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static SPROUT_CONSTEXPR copied_type make(Args&&... args) {
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return sprout::make<copied_type>(sprout::forward<Args>(args)...);
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}
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template<typename Cont, typename... Args>
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static SPROUT_CONSTEXPR copied_type remake(
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Cont&& cont,
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typename sprout::container_traits<sprout::adaptors::replaced_range<Range> >::difference_type size,
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Args&&... args
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)
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{
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return sprout::remake<copied_type>(sprout::forward<Cont>(cont), size, sprout::forward<Args>(args)...);
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}
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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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