protected:
SGBinaryExpression(SGExpression<T>* expr0, SGExpression<T>* expr1)
{ setOperand(0, expr0); setOperand(1, expr1); }
protected:
SGBinaryExpression(SGExpression<T>* expr0, SGExpression<T>* expr1)
{ setOperand(0, expr0); setOperand(1, expr1); }