From 57d4e78d54dbb37f891f98942105224ddee6d976 Mon Sep 17 00:00:00 2001
From: bolero-MURAKAMI <bolero.murakami@gmail.com>
Date: Sat, 5 Apr 2014 21:56:06 +0900
Subject: [PATCH] add C++14 constexpr bogo_sort, bozo_sort

---
 sprout/algorithm/cxx14.hpp             |  7 ++---
 sprout/algorithm/cxx14/bogo_sort.hpp   | 35 ++++++++++++++++++++++++
 sprout/algorithm/cxx14/bozo_sort.hpp   | 35 ++++++++++++++++++++++++
 sprout/algorithm/cxx14/random_swap.hpp | 38 ++++++++++++++++++++++++++
 sprout/algorithm/cxx14/shuffle.hpp     |  5 ++--
 5 files changed, 114 insertions(+), 6 deletions(-)
 create mode 100644 sprout/algorithm/cxx14/bogo_sort.hpp
 create mode 100644 sprout/algorithm/cxx14/bozo_sort.hpp
 create mode 100644 sprout/algorithm/cxx14/random_swap.hpp

diff --git a/sprout/algorithm/cxx14.hpp b/sprout/algorithm/cxx14.hpp
index 710e471d..9953d372 100644
--- a/sprout/algorithm/cxx14.hpp
+++ b/sprout/algorithm/cxx14.hpp
@@ -62,9 +62,8 @@
 #include <sprout/algorithm/cxx14/copy_while.hpp>
 #include <sprout/algorithm/cxx14/copy_until.hpp>
 #include <sprout/algorithm/cxx14/clamp_range.hpp>
-//#include <sprout/algorithm/cxx14/bogo_sort.hpp>
-//#include <sprout/algorithm/cxx14/bogo_sort_result.hpp>
-//#include <sprout/algorithm/cxx14/bozo_sort.hpp>
-//#include <sprout/algorithm/cxx14/bozo_sort_result.hpp>
+#include <sprout/algorithm/fixed/random_swap.hpp>
+#include <sprout/algorithm/cxx14/bogo_sort.hpp>
+#include <sprout/algorithm/cxx14/bozo_sort.hpp>
 
 #endif	// #ifndef SPROUT_ALGORITHM_CXX14_HPP
diff --git a/sprout/algorithm/cxx14/bogo_sort.hpp b/sprout/algorithm/cxx14/bogo_sort.hpp
new file mode 100644
index 00000000..87af4282
--- /dev/null
+++ b/sprout/algorithm/cxx14/bogo_sort.hpp
@@ -0,0 +1,35 @@
+/*=============================================================================
+  Copyright (c) 2011-2014 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_ALGORITHM_CXX14_BOGO_SORT_HPP
+#define SPROUT_ALGORITHM_CXX14_BOGO_SORT_HPP
+
+#include <sprout/config.hpp>
+#include <sprout/algorithm/is_sorted.hpp>
+#include <sprout/algorithm/cxx14/shuffle.hpp>
+
+namespace sprout {
+	//
+	// bogo_sort
+	//
+	template<typename RandomAccessIterator, typename UniformRandomNumberGenerator>
+	inline SPROUT_CXX14_CONSTEXPR void
+	bogo_sort(RandomAccessIterator first, RandomAccessIterator last, UniformRandomNumberGenerator&& g) {
+		while (!sprout::is_sorted(first, last)) {
+			sprout::shuffle(first, last, g);
+		}
+	}
+	template<typename RandomAccessIterator, typename UniformRandomNumberGenerator, typename Compare>
+	inline SPROUT_CXX14_CONSTEXPR void
+	bogo_sort(RandomAccessIterator first, RandomAccessIterator last, UniformRandomNumberGenerator&& g, Compare comp) {
+		while (!sprout::is_sorted(first, last, comp)) {
+			sprout::shuffle(first, last, g);
+		}
+	}
+}	// namespace sprout
+
+#endif	// #ifndef SPROUT_ALGORITHM_CXX14_BOGO_SORT_HPP
diff --git a/sprout/algorithm/cxx14/bozo_sort.hpp b/sprout/algorithm/cxx14/bozo_sort.hpp
new file mode 100644
index 00000000..af72626f
--- /dev/null
+++ b/sprout/algorithm/cxx14/bozo_sort.hpp
@@ -0,0 +1,35 @@
+/*=============================================================================
+  Copyright (c) 2011-2014 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_ALGORITHM_CXX14_BOZO_SORT_HPP
+#define SPROUT_ALGORITHM_CXX14_BOZO_SORT_HPP
+
+#include <sprout/config.hpp>
+#include <sprout/algorithm/is_sorted.hpp>
+#include <sprout/algorithm/cxx14/random_swap.hpp>
+
+namespace sprout {
+	//
+	// bozo_sort
+	//
+	template<typename RandomAccessIterator, typename UniformRandomNumberGenerator>
+	inline SPROUT_CXX14_CONSTEXPR void
+	bozo_sort(RandomAccessIterator first, RandomAccessIterator last, UniformRandomNumberGenerator&& g) {
+		while (!sprout::is_sorted(first, last)) {
+			sprout::random_swap(first, last, g);
+		}
+	}
+	template<typename RandomAccessIterator, typename UniformRandomNumberGenerator, typename Compare>
+	inline SPROUT_CXX14_CONSTEXPR void
+	bozo_sort(RandomAccessIterator first, RandomAccessIterator last, UniformRandomNumberGenerator&& g, Compare comp) {
+		while (!sprout::is_sorted(first, last, comp)) {
+			sprout::random_swap(first, last, g);
+		}
+	}
+}	// namespace sprout
+
+#endif	// #ifndef SPROUT_ALGORITHM_CXX14_BOZO_SORT_HPP
diff --git a/sprout/algorithm/cxx14/random_swap.hpp b/sprout/algorithm/cxx14/random_swap.hpp
new file mode 100644
index 00000000..892b94f1
--- /dev/null
+++ b/sprout/algorithm/cxx14/random_swap.hpp
@@ -0,0 +1,38 @@
+/*=============================================================================
+  Copyright (c) 2011-2014 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_ALGORITHM_CXX14_RANDOM_SWAP_HPP
+#define SPROUT_ALGORITHM_CXX14_RANDOM_SWAP_HPP
+
+#include <cstddef>
+#include <iterator>
+#include <sprout/config.hpp>
+#include <sprout/algorithm/cxx14/iter_swap.hpp>
+#include <sprout/workaround/detail/uniform_int_distribution.hpp>
+
+namespace sprout {
+	//
+	// random_swap
+	//
+	template<typename RandomAccessIterator, typename UniformRandomNumberGenerator>
+	inline SPROUT_CXX14_CONSTEXPR void
+	random_swap(RandomAccessIterator first, RandomAccessIterator last, UniformRandomNumberGenerator&& g) {
+		typedef typename std::iterator_traits<RandomAccessIterator>::difference_type difference_type;
+		typedef SPROUT_WORKAROUND_DETAIL_UNIFORM_INT_DISTRIBUTION<std::ptrdiff_t> distribution_type;
+		difference_type d = last - first;
+		if (d > 1) {
+			distribution_type dist(0, d);
+			difference_type i = dist(g);
+			difference_type j = dist(g);
+			if (i != j) {
+				sprout::iter_swap(first + i, first + j);
+			}
+		}
+	}
+}	// namespace sprout
+
+#endif	// #ifndef SPROUT_ALGORITHM_CXX14_RANDOM_SWAP_HPP
diff --git a/sprout/algorithm/cxx14/shuffle.hpp b/sprout/algorithm/cxx14/shuffle.hpp
index 15ac44b4..889c5912 100644
--- a/sprout/algorithm/cxx14/shuffle.hpp
+++ b/sprout/algorithm/cxx14/shuffle.hpp
@@ -8,9 +8,9 @@
 #ifndef SPROUT_ALGORITHM_CXX14_SHUFFLE_HPP
 #define SPROUT_ALGORITHM_CXX14_SHUFFLE_HPP
 
+#include <cstddef>
 #include <iterator>
 #include <sprout/config.hpp>
-#include <sprout/iterator/distance.hpp>
 #include <sprout/algorithm/cxx14/iter_swap.hpp>
 #include <sprout/workaround/detail/uniform_int_distribution.hpp>
 
@@ -29,8 +29,9 @@ namespace sprout {
 			distribution_type dist;
 			for (--last, --d; first < last; ++first, --d) {
 				difference_type i = dist(g, param_type(0, d));
-				if (i != difference_type(0))
+				if (i != difference_type(0)) {
 					sprout::iter_swap(first, first + i);
+				}
 			}
 		}
 	}