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+
+//  (C) Copyright Edward Diener 2011-2015
+//  Use, modification and distribution are 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).
+
+#if !defined(BOOST_VMD_NOT_EQUAL_HPP)
+#define BOOST_VMD_NOT_EQUAL_HPP
+
+#include <boost/vmd/detail/setup.hpp>
+
+#if BOOST_PP_VARIADICS
+
+#include <boost/preprocessor/logical/compl.hpp>
+#include <boost/vmd/equal.hpp>
+
+/*
+
+  The succeeding comments in this file are in doxygen format.
+
+*/
+
+/** \file
+*/
+
+/** \def BOOST_VMD_NOT_EQUAL(sequence,...)
+
+    \brief Tests any two sequences for inequality.
+
+    sequence     = First sequence.
+    ...          = variadic parameters, maximum of 2.
+    
+    The first variadic parameter is required and is the second sequence to test.
+    The optional second variadic parameter is a VMD type as a filter.
+    
+    The macro tests any two sequences for inequality. For sequences to be unequal 
+    either the VMD types of each sequence must be unequal or the individual elements of the
+    sequence must be unequal. 
+    
+    The single optional parameter is a filter. The filter is a VMD type which specifies
+    that both sequences to test must be of that VMD type, as well as being equal to
+    each other, for the test to fail, else it succeeds.
+    
+    returns   = 1 upon success or 0 upon failure. Success means that the sequences are
+                unequal or, if the optional parameter is specified, that the sequences are
+                not of the optional VMD type; otherwise 0 is returned if the sequences
+                are equal.
+                
+    The macro is implemented as the complement of BOOST_VMD_EQUAL, so that whenever
+    BOOST_VMD_EQUAL would return 1 the macro returns 0 and whenever BOOST_VMD_EQUAL
+    would return 0 the macro would return 1.
+    
+*/
+
+#define BOOST_VMD_NOT_EQUAL(sequence,...) \
+    BOOST_PP_COMPL(BOOST_VMD_EQUAL(sequence,__VA_ARGS__)) \
+/**/
+
+/** \def BOOST_VMD_NOT_EQUAL_D(d,sequence,...)
+
+    \brief Tests any two sequences for inequality. Re-entrant version.
+
+    d         = The next available BOOST_PP_WHILE iteration. 
+    sequence  = First sequence.
+    ...       = variadic parameters, maximum of 2.
+    
+    The first variadic parameter is required and is the second sequence to test.
+    The optional second variadic parameter is a VMD type as a filter.
+    
+    The macro tests any two sequences for inequality. For sequences to be unequal 
+    either the VMD types of each sequence must be unequal or the individual elements of the
+    sequence must be unequal. 
+    
+    The single optional parameter is a filter. The filter is a VMD type which specifies
+    that both sequences to test must be of that VMD type, as well as being equal to
+    each other, for the test to fail, else it succeeds.
+    
+    returns   = 1 upon success or 0 upon failure. Success means that the sequences are
+                unequal or, if the optional parameter is specified, that the sequences are
+                not of the optional VMD type; otherwise 0 is returned if the sequences
+                are equal.
+                
+    The macro is implemented as the complement of BOOST_VMD_EQUAL, so that whenever
+    BOOST_VMD_EQUAL would return 1 the macro returns 0 and whenever BOOST_VMD_EQUAL
+    would return 0 the macro would return 1.
+    
+*/
+
+#define BOOST_VMD_NOT_EQUAL_D(d,sequence,...) \
+    BOOST_PP_COMPL(BOOST_VMD_EQUAL_D(d,sequence,__VA_ARGS__)) \
+/**/
+
+#endif /* BOOST_PP_VARIADICS */
+#endif /* BOOST_VMD_NOT_EQUAL_HPP */