[boost][range] - Improved handling of temporary ranges in range algorithms.

[SVN r63904]

test/test_function/true_predicate.hpp

@@ -0,0 +1,29 @@
+// Boost.Range library
+//
+//  Copyright Neil Groves 2010. Use, modification and
+//  distribution is subject to 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/libs/range/
+//
+#ifndef BOOST_RANGE_TEST_TEST_FUNCTION_TRUE_PREDICATE_HPP_INCLUDED
+#define BOOST_RANGE_TEST_TEST_FUNCTION_TRUE_PREDICATE_HPP_INCLUDED
+
+namespace boost
+{
+    namespace range_test_function
+    {
+        struct true_predicate
+        {
+            typedef bool result_type;
+
+            bool operator()() const { return true; }
+            template<class Arg> bool operator()(Arg) const { return true; }
+            template<class Arg1, class Arg2> bool operator()(Arg1,Arg2) const { return true; }
+        };
+    }
+}
+
+#endif // include guard