Merge Boost.Algorithm to release branch

[SVN r78025]

test/partition_point_test1.cpp

@@ -0,0 +1,98 @@
+/* 
+   Copyright (c) Marshall Clow 2011-2012.
+
+   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)
+
+    For more information, see http://www.boost.org
+*/
+
+#include <iostream>
+
+#include <boost/config.hpp>
+#include <boost/algorithm/cxx11/partition_point.hpp>
+#include <boost/test/included/test_exec_monitor.hpp>
+
+#include <string>
+#include <vector>
+#include <list>
+
+namespace ba = boost::algorithm;
+// namespace ba = boost;
+
+template <typename Container>
+typename Container::iterator offset_to_iter ( Container &v, int offset ) {
+	typename Container::iterator retval;
+	
+	if ( offset >= 0 ) {
+		retval = v.begin ();
+		std::advance ( retval, offset );
+		}
+	else {
+		retval = v.end ();
+		std::advance ( retval, offset + 1 );
+		}
+	return retval;
+	}
+
+template <typename Container, typename Predicate>
+void test_sequence ( Container &v, Predicate comp, int expected ) {
+    typename Container::iterator res, exp;
+    
+    res = ba::partition_point ( v.begin (), v.end (), comp );
+    exp = offset_to_iter ( v, expected );
+    std::cout << "Expected(1): " << std::distance ( v.begin (), exp ) 
+              <<       ", got: " << std::distance ( v.begin (), res ) << std::endl;
+    BOOST_CHECK ( exp == res );
+
+//  Duplicate the last element; this checks for any even/odd problems
+    v.push_back ( * v.rbegin ());
+    res = ba::partition_point ( v.begin (), v.end (), comp );
+    exp = offset_to_iter ( v, expected );
+    std::cout << "Expected(2): " << std::distance ( v.begin (), exp ) 
+              <<       ", got: " << std::distance ( v.begin (), res ) << std::endl;
+    BOOST_CHECK ( exp == res );
+    }
+
+template <typename T>
+struct less_than {
+public:
+    less_than ( T foo ) : val ( foo ) {}
+    less_than ( const less_than &rhs ) : val ( rhs.val ) {}
+
+    bool operator () ( const T &v ) const { return v < val; }
+private:
+    less_than ();
+    less_than operator = ( const less_than &rhs );
+    T val;
+    };
+
+
+void test_sequence1 () {
+    std::vector<int> v;
+    
+    v.clear ();
+    for ( int i = 5; i < 15; ++i )
+        v.push_back ( i );
+    test_sequence ( v, less_than<int>(3),  0 ); // no elements
+    test_sequence ( v, less_than<int>(6),  1 );    // only the first element
+    test_sequence ( v, less_than<int>(10), 5 );
+    test_sequence ( v, less_than<int>(99), -1 );   // all elements satisfy 
+
+//	With bidirectional iterators.
+    std::list<int> l;
+    for ( int i = 5; i < 15; ++i )
+        l.push_back ( i );
+    test_sequence ( l, less_than<int>(3),  0 ); // no elements
+    test_sequence ( l, less_than<int>(6),  1 );    // only the first element
+    test_sequence ( l, less_than<int>(10), 5 );
+    test_sequence ( l, less_than<int>(99), -1 );   // all elements satisfy 
+
+    }
+
+
+int test_main( int , char* [] )
+{
+  test_sequence1 ();
+  return 0;
+}