protected BinaryOperator(Rollable left, Rollable right)
{
if (left == null)
{
throw new ArgumentNullException(nameof(left));
}
if (right == null)
{
throw new ArgumentNullException(nameof(right));
}
this.Left = left;
this.Right = right;
}
private bool needsParenthesis(Rollable child) => (child as BinaryOperator)?.OperatorPrecedence < this.OperatorPrecedence;
public abstract Rollable With(Rollable left, Rollable right);
public Rollable Times(Rollable right) => this * right;
public Rollable Minus(Rollable right) => this - right;
public Rollable Plus(Rollable right) => this + right;
