bool Overlap(Action a, Action b)
{
CharSet seta, setb;
if (a.typ == Node.chr)
{
if (b.typ == Node.chr)
{
return(a.sym == b.sym);
}
else
{
setb = tab.CharClassSet(b.sym); return(setb[a.sym]);
}
}
else
{
seta = tab.CharClassSet(a.sym);
if (b.typ == Node.chr)
{
return(seta[b.sym]);
}
else
{
setb = tab.CharClassSet(b.sym); return(seta.Intersects(setb));
}
}
}
public CharSet Symbols(Tab tab)
{
CharSet s;
if (typ == Node.clas)
{
s = tab.CharClassSet(sym).Clone();
}
else
{
s = new CharSet(); s.Set(sym);
}
return(s);
}
public CharSet Symbols(Tab tab)
{
CharSet s;
if (typ == Node.clas)
s = tab.CharClassSet(sym).Clone();
else {
s = new CharSet(); s.Set(sym);
}
return s;
}