ceph/src/boost/libs/numeric/ublas/include/boost/numeric/ublas/operation/num_columns.hpp

   1 /**
   2  * -*- c++ -*-
   3  *
   4  * \file num_columns.hpp
   5  *
   6  * \brief The \c num_columns operation.
   7  *
   8  * Copyright (c) 2009, Marco Guazzone
   9  *
  10  * Distributed under the Boost Software License, Version 1.0. (See
  11  * accompanying file LICENSE_1_0.txt or copy at
  12  * http://www.boost.org/LICENSE_1_0.txt)
  13  *
  14  * \author Marco Guazzone, marco.guazzone@gmail.com
  15  */
  16
  17
  18 #ifndef BOOST_NUMERIC_UBLAS_OPERATION_NUM_COLUMNS_HPP
  19 #define BOOST_NUMERIC_UBLAS_OPERATION_NUM_COLUMNS_HPP
  20
  21
  22 #include <boost/numeric/ublas/detail/config.hpp>
  23 #include <boost/numeric/ublas/expression_types.hpp>
  24 #include <boost/numeric/ublas/traits.hpp>
  25
  26
  27 namespace boost { namespace numeric { namespace ublas {
  28
  29     /**
  30      * \brief Return the number of columns.
  31      * \tparam MatrixExprT A type which models the matrix expression concept.
  32      * \param m A matrix expression.
  33      * \return The number of columns.
  34      */
  35     template <typename MatrixExprT>
  36     BOOST_UBLAS_INLINE
  37     typename matrix_traits<MatrixExprT>::size_type num_columns(matrix_expression<MatrixExprT> const& me)
  38     {
  39         return me().size2();
  40     }
  41
  42 }}} // Namespace boost::numeric::ublas
  43
  44
  45 #endif // BOOST_NUMERIC_UBLAS_OPERATION_NUM_COLUMNS_HPP