/*-----------------------------------------------------*/
bool NOMAD::Cache::erase ( const NOMAD::Eval_Point & x )
{
    // check the eval types:
    if ( x.get_eval_type() != _eval_type )
        throw NOMAD::Cache::Cache_Error ( "Cache.cpp" , __LINE__ ,
                                         "NOMAD::Cache:erase(x): x.eval_type != cache.eval_type" );
    
    std::set<NOMAD::Cache_Point>::iterator it;
    NOMAD::cache_index_type       cache_index;
    
    // search in cache:
    const NOMAD::Eval_Point * cache_x = find ( x , it , cache_index );
    
    // the point has been found:
    if ( cache_x ) {
        
        // remove the point from the list of extern points:
        if ( cache_x->get_current_run() || x.get_current_run() ) {
            std::list<const NOMAD::Eval_Point*>::const_iterator end2 = _extern_pts.end();
            std::list<const NOMAD::Eval_Point*>::iterator       it2  = _extern_pts.begin();
            while ( it2 != end2 ) {
                if ( *it2 == cache_x || *it2 == &x ) {
                    _extern_pts.erase ( it2 );
                    break;
                }
                ++it2;
            }
        }
        
        // erase the point in cache if its address is different from &x:
        if ( cache_x != &x )
            delete cache_x;
        
        // remove the point from the cache:
        _sizeof -= x.size_of();
        
        switch ( cache_index ) {
            case NOMAD::CACHE_1:
                _cache1.erase ( it );
                break;
            case NOMAD::CACHE_2:
                _cache2.erase ( it );
                break;
            case NOMAD::CACHE_3:
                _cache3.erase ( it );
                break;
            case NOMAD::UNDEFINED_CACHE:
                break;
        }
        return true;
    }
    return false;
}
/*---------------------------------------------------------------------*/
void NOMAD::Cache::insert_extern_point ( const NOMAD::Eval_Point & x ) const
{
    if ( !x.get_current_run() )
        _extern_pts.push_front ( &x );
}