From a6d46d4ffa4088a0b527a212a3ecdff605467812 Mon Sep 17 00:00:00 2001
From: bolero-MURAKAMI <bolero.murakami@gmail.com>
Date: Fri, 15 Apr 2016 01:47:14 +0900
Subject: [PATCH] change begin, end traits

---
 sprout/container/begin.hpp                    |   4 +-
 sprout/container/container_range_traits.hpp   | 269 +++++++++++++++++-
 sprout/container/end.hpp                      |   6 +-
 sprout/type_traits.hpp                        |   1 +
 sprout/type_traits/is_within_namespace.hpp    |  15 +
 .../type_traits/is_within_namespace_boost.hpp |  60 ++++
 .../is_within_namespace_sprout.hpp            |  60 ++++
 sprout/utility/as_non_const.hpp               |  34 +++
 sprout/utility/cast.hpp                       |   1 +
 9 files changed, 445 insertions(+), 5 deletions(-)
 create mode 100644 sprout/type_traits/is_within_namespace.hpp
 create mode 100644 sprout/type_traits/is_within_namespace_boost.hpp
 create mode 100644 sprout/type_traits/is_within_namespace_sprout.hpp
 create mode 100644 sprout/utility/as_non_const.hpp

diff --git a/sprout/container/begin.hpp b/sprout/container/begin.hpp
index c33c792c..66d9083b 100644
--- a/sprout/container/begin.hpp
+++ b/sprout/container/begin.hpp
@@ -23,7 +23,9 @@ namespace sprout {
 	//			ADL callable range_begin(cont) -> range_begin(cont)
 	//			[default]
 	//				Container is T[N] -> iterator(cont)
-	//				otherwise -> cont.begin()
+	//				otherwise, ADL callable begin(cont) -> begin(cont)
+	//				otherwise, callabe cont.begin() -> cont.begin()
+	//				otherwise -> std::begin(cont)
 	//
 	template<typename Container>
 	inline SPROUT_CONSTEXPR typename sprout::container_traits<Container>::iterator
diff --git a/sprout/container/container_range_traits.hpp b/sprout/container/container_range_traits.hpp
index 8fdf00fb..62698769 100644
--- a/sprout/container/container_range_traits.hpp
+++ b/sprout/container/container_range_traits.hpp
@@ -8,12 +8,14 @@
 #ifndef SPROUT_CONTAINER_CONTAINER_RANGE_TRAITS_HPP
 #define SPROUT_CONTAINER_CONTAINER_RANGE_TRAITS_HPP
 
+#include <iterator>
 #include <utility>
 #include <type_traits>
 #include <sprout/workaround/std/cstddef.hpp>
 #include <sprout/config.hpp>
 #include <sprout/type_traits/integral_constant.hpp>
 #include <sprout/type_traits/identity.hpp>
+#include <sprout/type_traits/is_within_namespace_sprout.hpp>
 #include <sprout/container/traits_fwd.hpp>
 #include <sprout/container/container_traits.hpp>
 #include <sprout/container/range_functions_fwd.hpp>
@@ -21,6 +23,9 @@
 #include <sprout/adl/not_found.hpp>
 
 namespace sprout_adl {
+	sprout::not_found_via_adl begin(...);
+	sprout::not_found_via_adl end(...);
+
 	sprout::not_found_via_adl range_begin(...);
 	sprout::not_found_via_adl range_end(...);
 	sprout::not_found_via_adl range_size(...);
@@ -33,8 +38,266 @@ namespace sprout_adl {
 	sprout::not_found_via_adl range_data(...);
 }	// namespace sprout_adl
 
+
+namespace sprout_container_range_detail {
+	using sprout_adl::begin;
+	using sprout_adl::end;
+
+	template<typename T>
+	struct has_adl_begin_test {
+	public:
+		template<
+			typename U = T,
+			typename R = typename sprout::identity<decltype(begin(std::declval<U>()))>::type
+		>
+		static sprout::is_found_via_adl<R> test(int);
+		static sprout::false_type test(...);
+	};
+
+	template<typename Container>
+	inline SPROUT_CONSTEXPR typename sprout::container_traits<Container>::iterator
+	range_adl_begin(Container& cont) {
+		return begin(cont);
+	}
+	template<typename Container>
+	inline SPROUT_CONSTEXPR typename sprout::container_traits<Container const>::iterator
+	range_adl_begin(Container const& cont) {
+		return begin(cont);
+	}
+
+	template<typename T>
+	struct has_adl_end_test {
+	public:
+		template<
+			typename U = T,
+			typename R = typename sprout::identity<decltype(end(std::declval<U>()))>::type
+		>
+		static sprout::is_found_via_adl<R> test(int);
+		static sprout::false_type test(...);
+	};
+
+	template<typename Container>
+	inline SPROUT_CONSTEXPR typename sprout::container_traits<Container>::iterator
+	range_adl_end(Container& cont) {
+		return end(cont);
+	}
+	template<typename Container>
+	inline SPROUT_CONSTEXPR typename sprout::container_traits<Container const>::iterator
+	range_adl_end(Container const& cont) {
+		return end(cont);
+	}
+}	// namespace sprout_container_range_detail
+
 namespace sprout {
 	namespace detail {
+#if defined(_MSC_VER) && (_MSC_VER > 1900)
+		template<typename T, typename Base_ = typename sprout::identity<decltype(sprout_container_range_detail::has_adl_begin_test<T>::test(0))>::type>
+		struct has_adl_begin
+			: public Base_
+		{};
+#else
+		template<typename T>
+		struct has_adl_begin
+			: public sprout::identity<decltype(sprout_container_range_detail::has_adl_begin_test<T>::test(0))>::type
+		{};
+#endif
+		template<typename T, bool = sprout::is_within_namespace_sprout<T>::value>
+		struct has_adl_begin_without_sprout
+			: public sprout::false_type
+		{};
+		template<typename T>
+		struct has_adl_begin_without_sprout<T, false>
+			: public sprout::detail::has_adl_begin<T>
+		{};
+
+		template<typename T>
+		struct has_mem_begin_test {
+		public:
+			template<
+				typename U = T,
+				typename = typename sprout::identity<decltype(std::declval<U>().begin())>::type
+			>
+			static sprout::true_type test(int);
+			static sprout::false_type test(...);
+		};
+#if defined(_MSC_VER) && (_MSC_VER > 1900)
+		template<typename T, typename Base_ = typename sprout::identity<decltype(sprout::detail::has_mem_begin_test<T>::test(0))>::type>
+		struct has_mem_begin
+			: public Base_
+		{};
+#else
+		template<typename T>
+		struct has_mem_begin
+			: public sprout::identity<decltype(sprout::detail::has_mem_begin_test<T>::test(0))>::type
+		{};
+#endif
+
+		template<typename Container>
+		inline SPROUT_CONSTEXPR typename sprout::container_traits<Container>::iterator
+		range_adl_begin(Container& cont) {
+			using std::begin;
+			return begin(cont);
+		}
+		template<typename Container>
+		inline SPROUT_CONSTEXPR typename sprout::container_traits<Container const>::iterator
+		range_adl_begin(Container const& cont) {
+			using std::begin;
+			return begin(cont);
+		}
+
+		template<typename Container>
+		inline SPROUT_CONSTEXPR typename std::enable_if<
+			sprout::detail::has_adl_begin_without_sprout<Container&>::value,
+			typename sprout::container_traits<Container>::iterator
+		>::type
+		range_begin_impl(Container& cont) {
+			return sprout_container_range_detail::range_adl_begin(cont);
+		}
+		template<typename Container>
+		inline SPROUT_CONSTEXPR typename std::enable_if<
+			!sprout::detail::has_adl_begin_without_sprout<Container&>::value && sprout::detail::has_mem_begin<Container>::value,
+			typename sprout::container_traits<Container>::iterator
+		>::type
+		range_begin_impl(Container& cont) {
+			return cont.begin();
+		}
+		template<typename Container>
+		inline SPROUT_CONSTEXPR typename std::enable_if<
+			!sprout::detail::has_adl_begin_without_sprout<Container&>::value && !sprout::detail::has_mem_begin<Container>::value,
+			typename sprout::container_traits<Container>::iterator
+		>::type
+		range_begin_impl(Container& cont) {
+			return std::begin(cont);
+		}
+		template<typename Container>
+		inline SPROUT_CONSTEXPR typename std::enable_if<
+			sprout::detail::has_adl_begin_without_sprout<Container const&>::value,
+			typename sprout::container_traits<Container const>::iterator
+		>::type
+		range_begin_impl(Container const& cont) {
+			return sprout_container_range_detail::range_adl_begin(cont);
+		}
+		template<typename Container>
+		inline SPROUT_CONSTEXPR typename std::enable_if<
+			!sprout::detail::has_adl_begin_without_sprout<Container const&>::value && sprout::detail::has_mem_begin<Container const>::value,
+			typename sprout::container_traits<Container const>::iterator
+		>::type
+		range_begin_impl(Container const& cont) {
+			return cont.begin();
+		}
+		template<typename Container>
+		inline SPROUT_CONSTEXPR typename std::enable_if<
+			!sprout::detail::has_adl_begin_without_sprout<Container const&>::value && !sprout::detail::has_mem_begin<Container const>::value,
+			typename sprout::container_traits<Container const>::iterator
+		>::type
+		range_begin_impl(Container const& cont) {
+			return std::begin(cont);
+		}
+
+#if defined(_MSC_VER) && (_MSC_VER > 1900)
+		template<typename T, typename Base_ = typename sprout::identity<decltype(sprout_container_range_detail::has_adl_end_test<T>::test(0))>::type>
+		struct has_adl_end
+			: public Base_
+		{};
+#else
+		template<typename T>
+		struct has_adl_end
+			: public sprout::identity<decltype(sprout_container_range_detail::has_adl_end_test<T>::test(0))>::type
+		{};
+#endif
+		template<typename T, bool = sprout::is_within_namespace_sprout<T>::value>
+		struct has_adl_end_without_sprout
+			: public sprout::false_type
+		{};
+		template<typename T>
+		struct has_adl_end_without_sprout<T, false>
+			: public sprout::detail::has_adl_end<T>
+		{};
+
+		template<typename T>
+		struct has_mem_end_test {
+		public:
+			template<
+				typename U = T,
+				typename = typename sprout::identity<decltype(std::declval<U>().end())>::type
+			>
+			static sprout::true_type test(int);
+			static sprout::false_type test(...);
+		};
+#if defined(_MSC_VER) && (_MSC_VER > 1900)
+		template<typename T, typename Base_ = typename sprout::identity<decltype(sprout::detail::has_mem_end_test<T>::test(0))>::type>
+		struct has_mem_end
+			: public Base_
+		{};
+#else
+		template<typename T>
+		struct has_mem_end
+			: public sprout::identity<decltype(sprout::detail::has_mem_end_test<T>::test(0))>::type
+		{};
+#endif
+
+		template<typename Container>
+		inline SPROUT_CONSTEXPR typename sprout::container_traits<Container>::iterator
+		range_adl_end(Container& cont) {
+			using std::end;
+			return end(cont);
+		}
+		template<typename Container>
+		inline SPROUT_CONSTEXPR typename sprout::container_traits<Container const>::iterator
+		range_adl_end(Container const& cont) {
+			using std::end;
+			return end(cont);
+		}
+
+		template<typename Container>
+		inline SPROUT_CONSTEXPR typename std::enable_if<
+			sprout::detail::has_adl_end_without_sprout<Container&>::value,
+			typename sprout::container_traits<Container>::iterator
+		>::type
+		range_end_impl(Container& cont) {
+			return sprout_container_range_detail::range_adl_end(cont);
+		}
+		template<typename Container>
+		inline SPROUT_CONSTEXPR typename std::enable_if<
+			!sprout::detail::has_adl_end_without_sprout<Container&>::value && sprout::detail::has_mem_end<Container>::value,
+			typename sprout::container_traits<Container>::iterator
+		>::type
+		range_end_impl(Container& cont) {
+			return cont.end();
+		}
+		template<typename Container>
+		inline SPROUT_CONSTEXPR typename std::enable_if<
+			!sprout::detail::has_adl_end_without_sprout<Container&>::value && !sprout::detail::has_mem_end<Container>::value,
+			typename sprout::container_traits<Container>::iterator
+		>::type
+		range_end_impl(Container& cont) {
+			return std::end(cont);
+		}
+		template<typename Container>
+		inline SPROUT_CONSTEXPR typename std::enable_if<
+			sprout::detail::has_adl_end_without_sprout<Container const&>::value,
+			typename sprout::container_traits<Container const>::iterator
+		>::type
+		range_end_impl(Container const& cont) {
+			return sprout_container_range_detail::range_adl_end(cont);
+		}
+		template<typename Container>
+		inline SPROUT_CONSTEXPR typename std::enable_if<
+			!sprout::detail::has_adl_end_without_sprout<Container const&>::value && sprout::detail::has_mem_end<Container const>::value,
+			typename sprout::container_traits<Container const>::iterator
+		>::type
+		range_end_impl(Container const& cont) {
+			return cont.end();
+		}
+		template<typename Container>
+		inline SPROUT_CONSTEXPR typename std::enable_if<
+			!sprout::detail::has_adl_end_without_sprout<Container const&>::value && !sprout::detail::has_mem_end<Container const>::value,
+			typename sprout::container_traits<Container const>::iterator
+		>::type
+		range_end_impl(Container const& cont) {
+			return std::end(cont);
+		}
+
 		template<typename T>
 		struct has_mem_size_test {
 		public:
@@ -394,12 +657,14 @@ namespace sprout_container_range_detail {
 	template<typename Container>
 	inline SPROUT_CONSTEXPR typename sprout::container_traits<Container>::iterator
 	range_begin(Container& cont) {
-		return cont.begin();
+		return sprout::detail::range_begin_impl(cont);
+//		return cont.begin();
 	}
 	template<typename Container>
 	inline SPROUT_CONSTEXPR typename sprout::container_traits<Container const>::iterator
 	range_begin(Container const& cont) {
-		return cont.begin();
+		return sprout::detail::range_begin_impl(cont);
+//		return cont.begin();
 	}
 
 	template<typename Container>
diff --git a/sprout/container/end.hpp b/sprout/container/end.hpp
index 70de7ab8..13addd04 100644
--- a/sprout/container/end.hpp
+++ b/sprout/container/end.hpp
@@ -22,8 +22,10 @@ namespace sprout {
 	//		[default]
 	//			ADL callable range_end(cont) -> range_end(cont)
 	//			[default]
-	//				Container is T[N] -> iterator(cont) + N
-	//				otherwise -> cont.end()
+	//				Container is T[N] -> iterator(cont)
+	//				otherwise, ADL callable end(cont) -> end(cont)
+	//				otherwise, callabe cont.end() -> cont.end()
+	//				otherwise -> std::end(cont)
 	//
 	template<typename Container>
 	inline SPROUT_CONSTEXPR typename sprout::container_traits<Container>::iterator
diff --git a/sprout/type_traits.hpp b/sprout/type_traits.hpp
index 7247a443..08e8fdd5 100644
--- a/sprout/type_traits.hpp
+++ b/sprout/type_traits.hpp
@@ -12,6 +12,7 @@
 #include <sprout/type_traits/std.hpp>
 #include <sprout/type_traits/composite_modification.hpp>
 #include <sprout/type_traits/has_operator.hpp>
+#include <sprout/type_traits/is_within_namespace.hpp>
 #include <sprout/type_traits/introspection.hpp>
 
 #endif	// #ifndef SPROUT_TYPE_TRAITS_HPP
diff --git a/sprout/type_traits/is_within_namespace.hpp b/sprout/type_traits/is_within_namespace.hpp
new file mode 100644
index 00000000..a20de099
--- /dev/null
+++ b/sprout/type_traits/is_within_namespace.hpp
@@ -0,0 +1,15 @@
+/*=============================================================================
+  Copyright (c) 2011-2016 Bolero MURAKAMI
+  https://github.com/bolero-MURAKAMI/Sprout
+
+  Distributed under the Boost Software License, Version 1.0. (See accompanying
+  file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+=============================================================================*/
+#ifndef SPROUT_TYPE_TRAITS_IS_WITHIN_NAMESPACE_HPP
+#define SPROUT_TYPE_TRAITS_IS_WITHIN_NAMESPACE_HPP
+
+#include <sprout/config.hpp>
+#include <sprout/type_traits/is_within_namespace_sprout.hpp>
+#include <sprout/type_traits/is_within_namespace_boost.hpp>
+
+#endif	// #ifndef SPROUT_TYPE_TRAITS_IS_WITHIN_NAMESPACE_HPP
diff --git a/sprout/type_traits/is_within_namespace_boost.hpp b/sprout/type_traits/is_within_namespace_boost.hpp
new file mode 100644
index 00000000..f7a6d27c
--- /dev/null
+++ b/sprout/type_traits/is_within_namespace_boost.hpp
@@ -0,0 +1,60 @@
+/*=============================================================================
+  Copyright (c) 2011-2016 Bolero MURAKAMI
+  https://github.com/bolero-MURAKAMI/Sprout
+
+  Distributed under the Boost Software License, Version 1.0. (See accompanying
+  file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+=============================================================================*/
+#ifndef SPROUT_TYPE_TRAITS_IS_WITHIN_NAMESPACE_BOOST_HPP
+#define SPROUT_TYPE_TRAITS_IS_WITHIN_NAMESPACE_BOOST_HPP
+
+#include <utility>
+#include <sprout/config.hpp>
+#include <sprout/type_traits/integral_constant.hpp>
+#include <sprout/type_traits/identity.hpp>
+#include <sprout/adl/not_found.hpp>
+
+namespace sprout_adl {
+	sprout::not_found_via_adl sprout_adl_tester_namespace_boost(...);
+}	// namespace sprout_adl
+
+namespace boost {
+	template<typename T>
+	void sprout_adl_tester_namespace_boost(T&&);
+}	// namespace boost
+
+namespace sprout_adl_tester_detail {
+	using sprout_adl::sprout_adl_tester_namespace_boost;
+
+	template<typename T>
+	struct is_within_namespace_boost_test {
+	public:
+		template<
+			typename U = T,
+			typename R = typename sprout::identity<decltype(sprout_adl_tester_namespace_boost(std::declval<U>()))>::type
+		>
+		static sprout::is_found_via_adl<R> test(int);
+		static sprout::false_type test(...);
+	};
+}	// namespace sprout_adl_tester_detail
+
+namespace sprout {
+#if defined(_MSC_VER) && (_MSC_VER > 1900)
+	template<typename T, typename Base_ = typename sprout::identity<decltype(sprout_adl_tester_detail::is_within_namespace_boost_test<T>::test(0))>::type>
+	struct is_within_namespace_boost
+		: public Base_
+	{};
+#else
+	template<typename T>
+	struct is_within_namespace_boost
+		: public sprout::identity<decltype(sprout_adl_tester_detail::is_within_namespace_boost_test<T>::test(0))>::type
+	{};
+#endif
+
+#if SPROUT_USE_VARIABLE_TEMPLATES
+	template<typename T>
+	SPROUT_STATIC_CONSTEXPR bool is_within_namespace_boost_v = sprout::is_within_namespace_boost<T>::value;
+#endif	// #if SPROUT_USE_VARIABLE_TEMPLATES
+}	// namespace sprout
+
+#endif	// #ifndef SPROUT_TYPE_TRAITS_IS_WITHIN_NAMESPACE_BOOST_HPP
diff --git a/sprout/type_traits/is_within_namespace_sprout.hpp b/sprout/type_traits/is_within_namespace_sprout.hpp
new file mode 100644
index 00000000..3538c229
--- /dev/null
+++ b/sprout/type_traits/is_within_namespace_sprout.hpp
@@ -0,0 +1,60 @@
+/*=============================================================================
+  Copyright (c) 2011-2016 Bolero MURAKAMI
+  https://github.com/bolero-MURAKAMI/Sprout
+
+  Distributed under the Boost Software License, Version 1.0. (See accompanying
+  file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+=============================================================================*/
+#ifndef SPROUT_TYPE_TRAITS_IS_WITHIN_NAMESPACE_SPROUT_HPP
+#define SPROUT_TYPE_TRAITS_IS_WITHIN_NAMESPACE_SPROUT_HPP
+
+#include <utility>
+#include <sprout/config.hpp>
+#include <sprout/type_traits/integral_constant.hpp>
+#include <sprout/type_traits/identity.hpp>
+#include <sprout/adl/not_found.hpp>
+
+namespace sprout_adl {
+	sprout::not_found_via_adl sprout_adl_tester_namespace_sprout(...);
+}	// namespace sprout_adl
+
+namespace sprout {
+	template<typename T>
+	void sprout_adl_tester_namespace_sprout(T&&);
+}	// namespace sprout
+
+namespace sprout_adl_tester_detail {
+	using sprout_adl::sprout_adl_tester_namespace_sprout;
+
+	template<typename T>
+	struct is_within_namespace_sprout_test {
+	public:
+		template<
+			typename U = T,
+			typename R = typename sprout::identity<decltype(sprout_adl_tester_namespace_sprout(std::declval<U>()))>::type
+		>
+		static sprout::is_found_via_adl<R> test(int);
+		static sprout::false_type test(...);
+	};
+}	// namespace sprout_adl_tester_detail
+
+namespace sprout {
+#if defined(_MSC_VER) && (_MSC_VER > 1900)
+	template<typename T, typename Base_ = typename sprout::identity<decltype(sprout_adl_tester_detail::is_within_namespace_sprout_test<T>::test(0))>::type>
+	struct is_within_namespace_sprout
+		: public Base_
+	{};
+#else
+	template<typename T>
+	struct is_within_namespace_sprout
+		: public sprout::identity<decltype(sprout_adl_tester_detail::is_within_namespace_sprout_test<T>::test(0))>::type
+	{};
+#endif
+
+#if SPROUT_USE_VARIABLE_TEMPLATES
+	template<typename T>
+	SPROUT_STATIC_CONSTEXPR bool is_within_namespace_sprout_v = sprout::is_within_namespace_sprout<T>::value;
+#endif	// #if SPROUT_USE_VARIABLE_TEMPLATES
+}	// namespace sprout
+
+#endif	// #ifndef SPROUT_TYPE_TRAITS_IS_WITHIN_NAMESPACE_SPROUT_HPP
diff --git a/sprout/utility/as_non_const.hpp b/sprout/utility/as_non_const.hpp
new file mode 100644
index 00000000..27df6eba
--- /dev/null
+++ b/sprout/utility/as_non_const.hpp
@@ -0,0 +1,34 @@
+/*=============================================================================
+  Copyright (c) 2011-2016 Bolero MURAKAMI
+  https://github.com/bolero-MURAKAMI/Sprout
+
+  Distributed under the Boost Software License, Version 1.0. (See accompanying
+  file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+=============================================================================*/
+#ifndef SPROUT_UTILITY_AS_NON_CONST_HPP
+#define SPROUT_UTILITY_AS_NON_CONST_HPP
+
+#include <type_traits>
+#include <sprout/config.hpp>
+
+namespace sprout {
+	//
+	// as_non_const
+	//
+	template<typename T>
+	inline SPROUT_CONSTEXPR typename std::conditional<
+		std::is_lvalue_reference<T>::value,
+		typename std::remove_const<typename std::remove_reference<T>::type>::type&,
+		typename std::remove_const<typename std::remove_reference<T>::type>::type&&
+	>::type
+	as_non_const(T&& t) {
+		typedef typename std::conditional<
+			std::is_lvalue_reference<T>::value,
+			typename std::remove_const<typename std::remove_reference<T>::type>::type&,
+			typename std::remove_const<typename std::remove_reference<T>::type>::type&&
+		>::type type;
+		return const_cast<type>(t);
+	}
+}	// namespace sprout
+
+#endif	// #ifndef SPROUT_UTILITY_AS_NON_CONST_HPP
diff --git a/sprout/utility/cast.hpp b/sprout/utility/cast.hpp
index 34e237e8..5147f44c 100644
--- a/sprout/utility/cast.hpp
+++ b/sprout/utility/cast.hpp
@@ -11,6 +11,7 @@
 #include <sprout/config.hpp>
 #include <sprout/utility/as_lvalue.hpp>
 #include <sprout/utility/as_const.hpp>
+#include <sprout/utility/as_non_const.hpp>
 #include <sprout/utility/lvalue_forward.hpp>
 #include <sprout/utility/unmove.hpp>
 #include <sprout/utility/pass_through.hpp>