fn_inv.hpp

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00001 // Copyright (C) 2009 NICTA
00002 // 
00003 // Authors:
00004 // - Conrad Sanderson (conradsand at ieee dot org)
00005 // 
00006 // This file is part of the Armadillo C++ library.
00007 // It is provided without any warranty of fitness
00008 // for any purpose. You can redistribute this file
00009 // and/or modify it under the terms of the GNU
00010 // Lesser General Public License (LGPL) as published
00011 // by the Free Software Foundation, either version 3
00012 // of the License or (at your option) any later version.
00013 // (see http://www.opensource.org/licenses for more info)
00014 
00015 
00016 //! \addtogroup fn_inv
00017 //! @{
00018 
00019 //! delayed matrix inverse
00020 template<typename T1>
00021 inline
00022 const Op<T1, op_inv>
00023 inv(const Base<typename T1::elem_type,T1>& X)
00024   {
00025   arma_extra_debug_sigprint();
00026   
00027   return Op<T1, op_inv>(X.get_ref());
00028   }
00029 
00030 
00031 
00032 //! remove the inverse operation if applied twice consecutively
00033 template<typename T1>
00034 inline
00035 const T1&
00036 inv(const Op<T1, op_inv>& X)
00037   {
00038   arma_extra_debug_sigprint();
00039   
00040   return X.m;
00041   }
00042 
00043 //! @}