public Node ExprPow()
{
Node expressionUnary = ExprUnary();
while (CurrentToken == TokenCategory.EXPONENTIATION)
{
Node expressionPow = new Pow()
{
AnchorToken = Expect(TokenCategory.EXPONENTIATION)
};
expressionPow.Add(expressionUnary);
expressionPow.Add(ExprUnary());
return(expressionPow);
}
return(expressionUnary);
}
public Node Pow()
{
var r = Fact();
if (Current == TokenCategory.POW)
{
var p = new Pow()
{
AnchorToken = Expect(TokenCategory.POW)
};
p.Add(r);
p.Add(Pow());
r = p;
}
return(r);
}
public Node Pow()
{
var result = Fact();
if (Current == TokenCategory.POW)
{
var node = new Pow()
{
AnchorToken = Expect(TokenCategory.POW)
};
node.Add(result);
node.Add(Pow());
result = node;
}
return(result);
}
public Node Pow()
{
var n1 = Fact();
if (Current == TokenCategory.POW)
{
var n2 = new Pow()
{
AnchorToken = Expect(TokenCategory.POW)
};
n2.Add(n1);
n2.Add(Pow());
n1 = n2;
}
return(n1);
}
public Node Pow()
{
var node1 = Fact();
if (Current == TokenCategory.POW)
{
// We need to create a new node
var node2 = new Pow() //Class Pow() : Node {}
{
AnchorToken = Expect(TokenCategory.POW)
//AnchorToken is an attribute of Node
//Useful for the production of MEANINGFUL error messages
};
node2.Add(node1); //You make node1 the child of node2
node2.Add(Pow()); //Method Node Pow()
node1 = node2; //Points the reference to the parent Pow Node
}
return(node1);
}