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linx64/include/boost/geometry/iterators/has_one_element.hpp

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+// Boost.Geometry (aka GGL, Generic Geometry Library)
+
+// Copyright (c) 2014, Oracle and/or its affiliates.
+
+// Contributed and/or modified by Menelaos Karavelas, on behalf of Oracle
+
+// Licensed under the Boost Software License version 1.0.
+// http://www.boost.org/users/license.html
+
+#ifndef BOOST_GEOMETRY_ITERATORS_HAS_ONE_ELEMENT_HPP
+#define BOOST_GEOMETRY_ITERATORS_HAS_ONE_ELEMENT_HPP
+
+
+namespace boost { namespace geometry
+{
+
+
+// free function to test if an iterator range has a single element
+template <typename Iterator>
+inline bool has_one_element(Iterator first, Iterator beyond)
+{
+    return first != beyond && ++first == beyond;
+}
+
+
+}} // namespace boost::geometry
+
+
+#endif // BOOST_GEOMETRY_ITERATORS_HAS_ONE_ELEMENT_HPP