ublas/operation/num_columns.hpp

0001 /**
0002  * -*- c++ -*-
0003  *
0004  * \file num_columns.hpp
0005  *
0006  * \brief The \c num_columns operation.
0007  *
0008  * Copyright (c) 2009, Marco Guazzone
0009  *
0010  * Distributed under the Boost Software License, Version 1.0. (See
0011  * accompanying file LICENSE_1_0.txt or copy at
0012  * http://www.boost.org/LICENSE_1_0.txt)
0013  *
0014  * \author Marco Guazzone, marco.guazzone@gmail.com
0015  */
0016
0017
0018 #ifndef BOOST_NUMERIC_UBLAS_OPERATION_NUM_COLUMNS_HPP
0019 #define BOOST_NUMERIC_UBLAS_OPERATION_NUM_COLUMNS_HPP
0020
0021
0022 #include <boost/numeric/ublas/detail/config.hpp>
0023 #include <boost/numeric/ublas/expression_types.hpp>
0024 #include <boost/numeric/ublas/traits.hpp>
0025
0026
0027 namespace boost { namespace numeric { namespace ublas {
0028
0029     /**
0030      * \brief Return the number of columns.
0031      * \tparam MatrixExprT A type which models the matrix expression concept.
0032      * \param m A matrix expression.
0033      * \return The number of columns.
0034      */
0035     template <typename MatrixExprT>
0036     BOOST_UBLAS_INLINE
0037     typename matrix_traits<MatrixExprT>::size_type num_columns(matrix_expression<MatrixExprT> const& me)
0038     {
0039         return me().size2();
0040     }
0041
0042 }}} // Namespace boost::numeric::ublas
0043
0044
0045 #endif // BOOST_NUMERIC_UBLAS_OPERATION_NUM_COLUMNS_HPP