Evaluators.hpp

/*
 * This file is part of bogus, a C++ sparse block matrix library.
 *
 * Copyright 2015 Gilles Daviet <gdaviet@gmail.com>
 *
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/.
*/

#ifndef BOGUS_BLOCK_EVALUATORS_HPP
#define BOGUS_BLOCK_EVALUATORS_HPP

#include "Traits.hpp"

namespace bogus {

template< typename Src, typename Dest = typename BlockMatrixTraits<Src>::PlainObjectType >
struct Evaluator ;

template< typename Src, typename Dest >
struct Evaluator {
    Dest val ;

    Evaluator( const Src& src )
        : val(src)
    {}

    const Dest& operator * ( ) const {
        return val;
    }
    const Dest* operator -> ( ) const {
        return &val;
    }
};


template< typename Src >
struct Evaluator< Src, Src > {
    const Src &val ;

    Evaluator( const Src& src )
        : val(src)
    {}

    const Src& operator * ( ) const {
        return val;
    }
    const Src* operator -> ( ) const {
        return &val;
    }
};

template< typename Src, typename Dest >
struct Evaluator< Transpose<Src>, Dest >
: public Evaluator< Src, Dest >
{
    Evaluator( const Transpose< Src >& src )
        : Evaluator< Src, Dest >( src.matrix )
    {}
} ;

}

#endif