public double Visit(PlusOpNode caller)
{
double left = caller.LeftSon.Accept(this);
double right = caller.RightSon.Accept(this);
return(left + right);
}
public int Visit(PlusOpNode caller)
{
int left = caller.LeftSon.Accept(this);
int right = caller.RightSon.Accept(this);
return(checked (left + right));
}
public string Visit(PlusOpNode visited)
{
var sb = new StringBuilder();
// + has lowest priority and is associative - no need for parentheses around either child
sb.Append(visited.LeftSon.Accept(this));
sb.Append("+");
sb.Append(visited.RightSon.Accept(this));
return(sb.ToString());
}
public string Visit(PlusOpNode visited)
{
var sb = new StringBuilder();
sb.Append("(");
sb.Append(visited.LeftSon.Accept(this));
sb.Append("+");
sb.Append(visited.RightSon.Accept(this));
sb.Append(")");
return(sb.ToString());
}
public int Visit(PlusOpNode visited)
{
return(0);
}