// Returns NExprBitShift or any of subproduction nodes
public Node ExprBitShift()
{
Node resultingNode = ExprAdd();
while (CurrentToken == TokenCategory.SHIFT_LEFT || CurrentToken == TokenCategory.SHIFT_RIGHT || CurrentToken == TokenCategory.SHIFT_RIGHT_ALT)
{
NExprBitShift tmp = new NExprBitShift();
tmp.Add(resultingNode);
resultingNode = tmp;
switch (CurrentToken)
{
case TokenCategory.SHIFT_LEFT: {
resultingNode.AnchorToken = Expect(TokenCategory.SHIFT_LEFT);
resultingNode.Add(ExprAdd());
break;
}
case TokenCategory.SHIFT_RIGHT: {
resultingNode.AnchorToken = Expect(TokenCategory.SHIFT_RIGHT);
resultingNode.Add(ExprAdd());
break;
}
case TokenCategory.SHIFT_RIGHT_ALT: {
resultingNode.AnchorToken = Expect(TokenCategory.SHIFT_RIGHT_ALT);
resultingNode.Add(ExprAdd());
break;
}
// Default case would be unreachable
}
}
return(resultingNode);
}
public string Visit(NExprBitShift nExprBitShift)
{
string retVal = "";
if (nExprBitShift.children.Count == 1)
{
retVal += Visit((dynamic)nExprBitShift[0]);
}
else
{
retVal += Visit((dynamic)nExprBitShift[0]);
retVal += Visit((dynamic)nExprBitShift[1]);
retVal += "\t\tconv.i4\n";
if (nExprBitShift.AnchorToken.Category == TokenCategory.SHIFT_LEFT)
{
retVal += "\t\tshl\n";
}
else if (nExprBitShift.AnchorToken.Category == TokenCategory.SHIFT_RIGHT)
{
retVal += "\t\tshr\n";
}
else if (nExprBitShift.AnchorToken.Category == TokenCategory.SHIFT_RIGHT_ALT)
{
retVal += "\t\tshr.un\n";
}
}
return(retVal);
}
//------------------------------------------------------------
public void Visit(NExprBitShift node)
{
Console.WriteLine($"+++++++++++++++ NExprBitShift ++++++++++++++++");
//VisitChildren(node);
}
public void Visit(NExprBitShift nExprBitShift)
{
GenericChildVisitor(nExprBitShift);
}
