public double Visit(MinusOpNode caller)
{
double left = caller.LeftSon.Accept(this);
double right = caller.RightSon.Accept(this);
return(left - right);
}
public int Visit(MinusOpNode caller)
{
int left = caller.LeftSon.Accept(this);
int right = caller.RightSon.Accept(this);
return(checked (left - right));
}
public string Visit(MinusOpNode 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 string Visit(MinusOpNode visited)
{
var sb = new StringBuilder();
// - has lowest priority - no need for parentheses around left child
sb.Append(visited.LeftSon.Accept(this));
sb.Append("-");
// - is not associative - parentheses needed if right child has same priority
int thisPriority = visited.Accept(priorityGetter);
int rightSonPriority = visited.RightSon.Accept(priorityGetter);
if (rightSonPriority <= thisPriority)
{
sb.Append("(");
}
sb.Append(visited.RightSon.Accept(this));
if (rightSonPriority <= thisPriority)
{
sb.Append(")");
}
return(sb.ToString());
}
public int Visit(MinusOpNode visited)
{
return(0);
}