// Returns NExprAdd or any of subproduction nodes
public Node ExprAdd()
{
Node resultingNode = ExprMul();
while (CurrentToken == TokenCategory.SUBTRACTION || CurrentToken == TokenCategory.ADDITION)
{
NExprAdd tmp = new NExprAdd();
tmp.Add(resultingNode);
resultingNode = tmp;
switch (CurrentToken)
{
case TokenCategory.SUBTRACTION: {
resultingNode.AnchorToken = Expect(TokenCategory.SUBTRACTION);
resultingNode.Add(ExprMul());
break;
}
case TokenCategory.ADDITION: {
resultingNode.AnchorToken = Expect(TokenCategory.ADDITION);
resultingNode.Add(ExprMul());
break;
}
// Default case would be unreachable
}
}
return(resultingNode);
}
public string Visit(NExprAdd nExprAdd)
{
string retVal = "";
if (nExprAdd.children.Count == 1)
{
retVal += Visit((dynamic)nExprAdd[0]);
}
else
{
switch (nExprAdd.AnchorToken.Lexeme)
{
case "+": {
retVal += Visit((dynamic)nExprAdd[0]);
retVal += Visit((dynamic)nExprAdd[1]);
retVal += "\t\tadd\n";
break;
}
case "-": {
retVal += Visit((dynamic)nExprAdd[0]);
retVal += Visit((dynamic)nExprAdd[1]);
retVal += "\t\tsub\n";
break;
}
}
}
return(retVal);
}
//-----------------------------------------------------------
public void Visit(NExprAdd node)
{
Console.WriteLine($"+++++++++++++++ NExprAdd ++++++++++++++++");
VisitBinaryOperator('+', node /*, Type.INT*/);
}
public void Visit(NExprAdd nExprAdd)
{
GenericChildVisitor(nExprAdd);
}
