protected static boolean isOperatorLR( Symbol s ) {
        if( s == null )
            return false;

        switch( s ) {
            case ELEMENT_DIVIDE:
            case ELEMENT_TIMES:
            case ELEMENT_POWER:
            case RDIVIDE:
            case LDIVIDE:
            case TIMES:
            case POWER:
            case PLUS:
            case MINUS:
            case ASSIGN:
                return true;
        }
        return false;
    }
protected static boolean isOperatorLR ( Symbol s ) { if ( s == null ) return false ; switch ( s ) { case ELEMENT_DIVIDE : case ELEMENT_TIMES : case ELEMENT_POWER : case RDIVIDE : case LDIVIDE : case TIMES : case POWER : case PLUS : case MINUS : case ASSIGN : return true ; } return false ; }
Operators which affect the variables to its left and right