42 return new Sub(*
this);
BinaryOp & operator=(const BinaryOp &rhs)
This is an abstract class that models a query expression.
A base class for binary operations.
Sub & operator=(const Sub &rhs)
TE_DEFINE_VISITABLE Sub(Expression *arg1, Expression *arg2)
Constructor.
The subtraction operator.
Expression * clone() const
It creates a new copy of this expression.
The subtraction operator.