public string Visit(NExprUnary nExprUnary)
{
var retVal = "";
Token anchorToken = nExprUnary.AnchorToken;
retVal += Visit((dynamic)nExprUnary[0]);
if (anchorToken != null)
{
switch (anchorToken.Category)
{
case TokenCategory.ADDITION: {
// Do nothing
break;
}
case TokenCategory.SUBTRACTION: {
// Multiply times -1
retVal += "\t\tldc.i8 -1\n";
retVal += "\t\tmul\n";
break;
}
case TokenCategory.NOT /*!*/: {
string pushTrueValue = GenerateLabel();
string pushFalseValue = GenerateLabel();
string exitExpression = GenerateLabel();
retVal += "\t\tbrfalse " + pushTrueValue + "\n";
retVal += "\t\tbr " + pushFalseValue + "\n";
retVal += pushTrueValue + ":\n";
retVal += "\t\tldc.i8 1\n";
retVal += "\t\tbr " + exitExpression + "\n";
retVal += pushFalseValue + ":\n";
retVal += "\t\tldc.i8 0\n";
retVal += exitExpression + ":\n";
break;
}
case TokenCategory.BIT_NOT /*~*/: {
retVal += "\t\tnot\n";
break;
}
}
}
return(retVal);
}
// Returns NExprUnary or any of subproduction nodes
public Node ExprUnary()
{
NExprUnary nExprUnary = new NExprUnary();
if (firstOfUnary.Contains(CurrentToken))
{
switch (CurrentToken)
{
case TokenCategory.ADDITION: {
nExprUnary.AnchorToken = Expect(TokenCategory.ADDITION);
nExprUnary.Add(ExprUnary());
break;
}
case TokenCategory.SUBTRACTION: {
nExprUnary.AnchorToken = Expect(TokenCategory.SUBTRACTION);
nExprUnary.Add(ExprUnary());
break;
}
case TokenCategory.NOT: {
nExprUnary.AnchorToken = Expect(TokenCategory.NOT);
nExprUnary.Add(ExprUnary());
break;
}
case TokenCategory.BIT_NOT: {
nExprUnary.AnchorToken = Expect(TokenCategory.BIT_NOT);
nExprUnary.Add(ExprUnary());
break;
}
// Default case would be unreachable
}
}
else if (firstOfExprPrimary.Contains(CurrentToken))
{
return(ExprPrimary());
}
else
{
return(null);
}
return(nExprUnary);
}
//-----------------------------------------------------------
public void Visit(NExprUnary node)
{
Console.WriteLine($"+++++++++++++++ NExprUnary ++++++++++++++++");
//VisitBinaryOperator('*', node /*, Type.INT*/);
VisitChildren(node);
}
public void Visit(NExprUnary nExprUnary)
{
GenericChildVisitor(nExprUnary);
}
