add adaptors::counting

sprout/iterator/counting_iterator.hpp

@@ -0,0 +1,243 @@
+#ifndef SPROUT_ITERATOR_COUNTING_ITERATOR_HPP
+#define SPROUT_ITERATOR_COUNTING_ITERATOR_HPP
+
+#include <cstddef>
+#include <iterator>
+#include <utility>
+#include <type_traits>
+#include <sprout/config.hpp>
+#include <sprout/iterator/next.hpp>
+#include <sprout/iterator/prev.hpp>
+#include <sprout/iterator/distance.hpp>
+
+namespace sprout {
+	//
+	// counting_iterator
+	//
+	template<typename Incrementable>
+	class counting_iterator
+		: public std::iterator<
+			std::random_access_iterator_tag,
+			Incrementable,
+			std::ptrdiff_t,
+			Incrementable*,
+			Incrementable
+		>
+	{
+	public:
+		typedef std::random_access_iterator_tag iterator_category;
+		typedef Incrementable value_type;
+		typedef std::ptrdiff_t difference_type;
+		typedef value_type* pointer;
+		typedef value_type reference;
+	private:
+		value_type current_;
+	private:
+	public:
+		counting_iterator() = default;
+		counting_iterator(counting_iterator const&) = default;
+		explicit SPROUT_CONSTEXPR counting_iterator(value_type const& v)
+			: current_(v)
+		{}
+		template<typename U>
+		SPROUT_CONSTEXPR counting_iterator(counting_iterator<U> const& it)
+			: current_(it.current_)
+		{}
+		template<typename U>
+		counting_iterator& operator=(counting_iterator<U> const& it) {
+			counting_iterator temp(it);
+			temp.swap(*this);
+			return *this;
+		}
+		SPROUT_CONSTEXPR reference operator*() const {
+			return current_;
+		}
+		SPROUT_CONSTEXPR pointer operator->() const {
+			return &current_;
+		}
+		counting_iterator& operator++() {
+			++current_;
+			return *this;
+		}
+		counting_iterator operator++(int) {
+			counting_iterator result(*this);
+			++current_;
+			return result;
+		}
+		counting_iterator& operator--() {
+			--current_;
+			return *this;
+		}
+		counting_iterator operator--(int) {
+			counting_iterator temp(*this);
+			--current_;
+			return temp;
+		}
+		SPROUT_CONSTEXPR counting_iterator operator+(difference_type n) const {
+			return counting_iterator(current_ + n);
+		}
+		SPROUT_CONSTEXPR counting_iterator operator-(difference_type n) const {
+			return counting_iterator(current_ - n);
+		}
+		counting_iterator& operator+=(difference_type n) {
+			counting_iterator temp(current_ + n);
+			temp.swap(*this);
+			return *this;
+		}
+		counting_iterator& operator-=(difference_type n) {
+			counting_iterator temp(current_ - n);
+			temp.swap(*this);
+			return *this;
+		}
+		SPROUT_CONSTEXPR reference operator[](difference_type n) const {
+			return current_ + n;
+		}
+		SPROUT_CONSTEXPR counting_iterator next() const {
+			return counting_iterator(current_ + 1);
+		}
+		SPROUT_CONSTEXPR counting_iterator prev() const {
+			return counting_iterator(current_ - 1);
+		}
+		void swap(counting_iterator& other) {
+			using std::swap;
+			swap(current_, other.current_);
+		}
+	};
+
+	template<typename Incrementable1, typename Incrementable2>
+	SPROUT_CONSTEXPR bool operator==(
+		sprout::counting_iterator<Incrementable1> const& lhs,
+		sprout::counting_iterator<Incrementable2> const& rhs
+		)
+	{
+		return *lhs == *rhs;
+	}
+	template<typename Incrementable1, typename Incrementable2>
+	SPROUT_CONSTEXPR bool operator!=(
+		sprout::counting_iterator<Incrementable1> const& lhs,
+		sprout::counting_iterator<Incrementable2> const& rhs
+		)
+	{
+		return !(lhs == rhs);
+	}
+	template<typename Incrementable1, typename Incrementable2>
+	SPROUT_CONSTEXPR bool operator<(
+		sprout::counting_iterator<Incrementable1> const& lhs,
+		sprout::counting_iterator<Incrementable2> const& rhs
+		)
+	{
+		return *lhs < *rhs;
+	}
+	template<typename Incrementable1, typename Incrementable2>
+	SPROUT_CONSTEXPR bool operator>(
+		sprout::counting_iterator<Incrementable1> const& lhs,
+		sprout::counting_iterator<Incrementable2> const& rhs
+		)
+	{
+		return rhs < lhs;
+	}
+	template<typename Incrementable1, typename Incrementable2>
+	SPROUT_CONSTEXPR bool operator<=(
+		sprout::counting_iterator<Incrementable1> const& lhs,
+		sprout::counting_iterator<Incrementable2> const& rhs
+		)
+	{
+		return !(rhs < lhs);
+	}
+	template<typename Incrementable1, typename Incrementable2>
+	SPROUT_CONSTEXPR bool operator>=(
+		sprout::counting_iterator<Incrementable1> const& lhs,
+		sprout::counting_iterator<Incrementable2> const& rhs
+		)
+	{
+		return !(lhs < rhs);
+	}
+	template<typename Incrementable1, typename Incrementable2>
+	SPROUT_CONSTEXPR typename sprout::counting_iterator<Incrementable1>::difference_type operator-(
+		sprout::counting_iterator<Incrementable1> const& lhs,
+		sprout::counting_iterator<Incrementable2> const& rhs
+		)
+	{
+		return static_cast<typename sprout::counting_iterator<Incrementable1>::difference_type>(*lhs - *rhs);
+	}
+	template<typename Incrementable>
+	SPROUT_CONSTEXPR sprout::counting_iterator<Incrementable> operator+(
+		typename sprout::counting_iterator<Incrementable>::difference_type n,
+		sprout::counting_iterator<Incrementable> const& it
+		)
+	{
+		return it + n;
+	}
+
+	//
+	// make_counting_iterator
+	//
+	template<typename Incrementable>
+	SPROUT_CONSTEXPR sprout::counting_iterator<Incrementable>
+	make_counting_iterator(Incrementable const& v) {
+		return sprout::counting_iterator<Incrementable>(v);
+	}
+
+	//
+	// swap
+	//
+	template<typename Incrementable>
+	void swap(sprout::counting_iterator<Incrementable>& lhs, sprout::counting_iterator<Incrementable>& rhs)
+	SPROUT_NOEXCEPT_EXPR(SPROUT_NOEXCEPT_EXPR(lhs.swap(rhs)))
+	{
+		lhs.swap(rhs);
+	}
+
+	//
+	// next
+	//
+	template<typename Incrementable>
+	SPROUT_CONSTEXPR sprout::counting_iterator<Incrementable> next(
+		sprout::counting_iterator<Incrementable> const& it
+		)
+	{
+		return it.next();
+	}
+	template<typename Incrementable>
+	SPROUT_CONSTEXPR sprout::counting_iterator<Incrementable> next(
+		sprout::counting_iterator<Incrementable> const& it,
+		typename sprout::counting_iterator<Incrementable>::difference_type n
+		)
+	{
+		return it + n;
+	}
+
+	//
+	// prev
+	//
+	template<typename Incrementable>
+	SPROUT_CONSTEXPR sprout::counting_iterator<Incrementable> prev(
+		sprout::counting_iterator<Incrementable> const& it
+		)
+	{
+		return it.prev();
+	}
+	template<typename Incrementable>
+	SPROUT_CONSTEXPR sprout::counting_iterator<Incrementable> prev(
+		sprout::counting_iterator<Incrementable> const& it,
+		typename sprout::counting_iterator<Incrementable>::difference_type n
+		)
+	{
+		return it - n;
+	}
+
+	//
+	// distance
+	//
+	template<typename Incrementable>
+	SPROUT_CONSTEXPR typename std::iterator_traits<sprout::counting_iterator<Incrementable> >::difference_type
+	distance(
+		sprout::counting_iterator<Incrementable> first,
+		sprout::counting_iterator<Incrementable> last
+		)
+	{
+		return last - first;
+	}
+}	// namespace sprout
+
+#endif	// #ifndef SPROUT_ITERATOR_COUNTING_ITERATOR_HPP

sprout/range/adaptor.hpp

@@ -4,6 +4,7 @@
 #include <sprout/config.hpp>
 #include <sprout/range/adaptor/copied.hpp>
 #include <sprout/range/adaptor/transformed.hpp>
+#include <sprout/range/adaptor/size_enumed.hpp>
 #include <sprout/range/adaptor/sinusoidal.hpp>
 
 #endif	// #ifndef SPROUT_RANGE_ADAPTOR_HPP

sprout/range/adaptor/counting.hpp

@@ -0,0 +1,174 @@
+#ifndef SPROUT_RANGE_ADAPTOR_COUNTING_HPP
+#define SPROUT_RANGE_ADAPTOR_COUNTING_HPP
+
+#include <limits>
+#include <type_traits>
+#include <sprout/config.hpp>
+#include <sprout/pit.hpp>
+#include <sprout/container/traits.hpp>
+#include <sprout/container/functions.hpp>
+#include <sprout/iterator/counting_iterator.hpp>
+#include <sprout/range/range_container.hpp>
+#include <sprout/range/algorithm/copy.hpp>
+#include <sprout/type_traits/lvalue_reference.hpp>
+#include <sprout/utility/forward.hpp>
+#include <sprout/utility/lvalue_forward.hpp>
+
+namespace sprout {
+	namespace adaptors {
+		//
+		// counting_range
+		//
+		template<typename Incrementable, typename Range = void>
+		class counting_range
+			: public sprout::range::range_container<
+				sprout::counting_iterator<Incrementable>
+			>
+			, public sprout::detail::container_nosy_static_size<Range>
+			, public sprout::detail::container_nosy_fixed_size<Range>
+		{
+		public:
+			typedef Range range_type;
+			typedef sprout::range::range_container<
+				sprout::counting_iterator<Incrementable>
+			> base_type;
+			typedef typename base_type::iterator iterator;
+			typedef typename base_type::value_type value_type;
+			typedef typename base_type::difference_type difference_type;
+		public:
+			counting_range() = default;
+			counting_range(counting_range const&) = default;
+			explicit SPROUT_CONSTEXPR counting_range(range_type& range)
+				: base_type(
+					iterator(),
+					sprout::next(iterator(), sprout::size(range))
+					)
+			{}
+			SPROUT_CONSTEXPR counting_range(
+				range_type& range,
+				value_type const& first
+				)
+				: base_type(
+					iterator(first),
+					sprout::next(iterator(first), sprout::size(range))
+					)
+			{}
+			SPROUT_CONSTEXPR counting_range(
+				range_type& range,
+				value_type const& first,
+				value_type const& last
+				)
+				: base_type(
+					iterator(first),
+					sprout::size(range) < last - first ? sprout::next(iterator(first), sprout::size(range))
+						: iterator(last)
+					)
+			{}
+		};
+
+		template<typename Incrementable>
+		class counting_range<Incrementable, void>
+			: public sprout::range::range_container<
+				sprout::counting_iterator<Incrementable>
+			>
+		{
+		public:
+			typedef sprout::range::range_container<
+				sprout::counting_iterator<Incrementable>
+			> base_type;
+			typedef typename base_type::iterator iterator;
+			typedef typename base_type::value_type value_type;
+			typedef typename base_type::difference_type difference_type;
+		public:
+			counting_range() = default;
+			counting_range(counting_range const&) = default;
+			explicit SPROUT_CONSTEXPR counting_range(value_type const& first)
+				: base_type(
+					iterator(first),
+					iterator(std::numeric_limits<value_type>::max())
+					)
+			{}
+			SPROUT_CONSTEXPR counting_range(
+				value_type const& first,
+				value_type const& last
+				)
+				: base_type(
+					iterator(first),
+					iterator(last)
+					)
+			{}
+		};
+
+		//
+		// counting_forwarder
+		//
+		class counting_forwarder {
+		public:
+			template<typename Incrementable>
+			SPROUT_CONSTEXPR sprout::adaptors::counting_range<Incrementable>
+			operator()(Incrementable const& first) const {
+				return sprout::adaptors::counting_range<Incrementable>(first);
+			}
+			template<typename Incrementable>
+			SPROUT_CONSTEXPR sprout::adaptors::counting_range<Incrementable>
+			operator()(Incrementable const& first, Incrementable const& last) const {
+				return sprout::adaptors::counting_range<Incrementable>(first, last);
+			}
+		};
+
+		//
+		// counting
+		//
+		namespace {
+			SPROUT_STATIC_CONSTEXPR sprout::adaptors::counting_forwarder counting{};
+		}	// anonymous-namespace
+
+		//
+		// operator|
+		//
+		template<typename Range, typename Incrementable>
+		inline SPROUT_CONSTEXPR sprout::adaptors::counting_range<
+			Incrementable,
+			typename std::remove_reference<typename sprout::lvalue_reference<Range>::type>::type
+		>
+		operator|(Range&& lhs, sprout::adaptors::counting_range<Incrementable> const& rhs) {
+			return sprout::adaptors::counting_range<
+				Incrementable,
+				typename std::remove_reference<typename sprout::lvalue_reference<Range>::type>::type
+			>(
+				sprout::lvalue_forward<Range>(lhs),
+				*rhs.begin(),
+				*rhs.end()
+				);
+		}
+	}	// namespace adaptors
+
+	//
+	// container_construct_traits
+	//
+	template<typename Incrementable, typename Range>
+	struct container_construct_traits<sprout::adaptors::counting_range<Incrementable, Range> > {
+	public:
+		typedef typename sprout::container_construct_traits<Range>::copied_type copied_type;
+	public:
+		template<typename Cont>
+		static SPROUT_CONSTEXPR copied_type deep_copy(Cont&& cont) {
+			return sprout::range::fixed::copy(sprout::forward<Cont>(cont), sprout::pit<copied_type>());
+		}
+		template<typename... Args>
+		static SPROUT_CONSTEXPR copied_type make(Args&&... args) {
+			return sprout::make<copied_type>(sprout::forward<Args>(args)...);
+		}
+		template<typename Cont, typename... Args>
+		static SPROUT_CONSTEXPR copied_type remake(
+			Cont&& cont,
+			typename sprout::container_traits<sprout::adaptors::counting_range<Incrementable, Range> >::difference_type size,
+			Args&&... args
+			)
+		{
+			return sprout::remake<copied_type>(sprout::forward<Cont>(cont), size, sprout::forward<Args>(args)...);
+		}
+	};
+}	// namespace sprout
+
+#endif	// #ifndef SPROUT_RANGE_ADAPTOR_COUNTING_HPP

sprout/range/adaptor/transformed.hpp

@@ -45,8 +45,8 @@ namespace sprout {
 			typedef typename base_type::iterator iterator;
 			typedef typename base_type::size_type size_type;
 		public:
-			SPROUT_CONSTEXPR transformed_range() = default;
+			transformed_range() = default;
-			SPROUT_CONSTEXPR transformed_range(transformed_range const&) = default;
+			transformed_range(transformed_range const&) = default;
 			SPROUT_CONSTEXPR transformed_range(functor_type func, range_type& range1, range2_type& range2)
 				: base_type(
 					iterator(sprout::begin(range1), sprout::begin(range2), func),
@@ -77,8 +77,8 @@ namespace sprout {
 			> base_type;
 			typedef typename base_type::iterator iterator;
 		public:
-			SPROUT_CONSTEXPR transformed_range() = default;
+			transformed_range() = default;
-			SPROUT_CONSTEXPR transformed_range(transformed_range const&) = default;
+			transformed_range(transformed_range const&) = default;
 			SPROUT_CONSTEXPR transformed_range(functor_type func, range_type& range)
 				: base_type(
 					iterator(sprout::begin(range), func),