public Node ExprAnd()
{
//‹expr-comp› (&& ‹expr-comp›)*
var n1 = ExprComp();
while (CurrentToken == TokenCategory.AND)
{
var n2 = new ExprAnd()
{
AnchorToken = Expect(TokenCategory.AND)
};
n2.Add(n1);
n2.Add(ExprComp());
n1 = n2;
}
return(n1);
}
public string Visit(ExprAnd node)
{
var result = "";
var lbl = GenerateLabel();
var lbl2 = GenerateLabel();
if (node.AnchorToken.Category == TokenCategory.AND)
{
foreach (var n in node)
{
result +=
Visit((dynamic)n)
+ Line(Indent() + "ldc.i4 42")
+ Line(Indent() + "bne.un '" + lbl + "'");
}
return(result
+ Line(Indent() + "ldc.i4 42")
+ Line(Indent() + "br " + lbl2)
+ Line(Indent() + lbl + ":")
+ Line(Indent() + "ldc.i4.0 ")
+ Line(Indent() + lbl2 + ":"));
}
return(node.ToString() + "\n" + VisitChildren(node));
}
public void Visit(ExprAnd node)
{
VisitChildren(node);
}
