examples/include/valarray.h

/**************************************************************************
 *
 * valarray.h -- Header for valarray examples.
 *               Provides a valarray stream inserter.
 *
 * $Id: //stdlib/dev/examples/stdlib/include/valarray.h#13 $
 *
 ***************************************************************************
 *
 * Copyright (c) 1994-2005 Quovadx,  Inc., acting through its  Rogue Wave
 * Software division. Licensed under the Apache License, Version 2.0 (the
 * "License");  you may  not use this file except  in compliance with the
 * License.    You    may   obtain   a   copy   of    the   License    at
 * http://www.apache.org/licenses/LICENSE-2.0.    Unless   required    by
 * applicable law  or agreed to  in writing,  software  distributed under
 * the License is distributed on an "AS IS" BASIS,  WITHOUT WARRANTIES OR
 * CONDITIONS OF  ANY KIND, either  express or implied.  See  the License
 * for the specific language governing permissions  and limitations under
 * the License.
 * 
 **************************************************************************/

#ifndef VALARRAY_H_INCLUDED
#define VALARRAY_H_INCLUDED


#include <valarray>
#include <ostream>

#include <examples.h>

template<class T> 
inline std::ostream&
insert_valarray (std::ostream &out, const std::valarray<T> &v)
{
    out << "[";
    for (std::size_t i = 0; i < v.size (); i++) {
        out << v [i];
        if (i < v.size () - 1)
            out << ",";
    }
    return out << "]";
}

// Non-templatized insertion operators necessary for implicit
// conversion from slice_array<T> (etc.) to valarray<T>. (the
// conversion won't work in template argument deduction).
inline std::ostream& operator<< (std::ostream &out, const std::valarray<int> &v)
{
    return insert_valarray (out, v);
}

std::ostream& operator<< (std::ostream &out, const std::valarray<bool> &v)
{
    return insert_valarray (out, v);
}

#endif   // VALARRAY_H_INCLUDED