public int? ExampleInt(PGIntSet set)
{
if (set.IsCharSet && set.IsInverted && set.Contains('_'))
return '_';
if (set.ContainsEverything)
return 0;
if (set.IsEmptySet)
return null;
int example = int.MinValue;
int min = set.IsCharSet ? 32 : 0;
foreach (var range in set.Runs()) {
example = range.Lo < min ? range.Hi : range.Lo;
if (example > min)
break;
}
return example;
}
protected LNode GenerateSetDecl(PGIntSet set, Symbol setName)
{
var ranges = set.InternalRangeList();
IEnumerable<object> args;
Symbol method;
if (ranges.Count * 2 < set.SizeIgnoringInversion) { // use ranges
method = _NewSetOfRanges;
args = ranges.SelectMany(r => {
if (r.Lo >= 32 && r.Hi < 0xFFFC)
return new object[] { (char)r.Lo, (char)r.Hi };
else
return new object[] { r.Lo, r.Hi };
});
} else {
method = _NewSet;
args = set.IntegerSequence(false).Select(n =>
set.IsCharSet && n >= 32 && n < 0xFFFC ? (object)(char)n : (object)(int)n);
}
return
F.Attr(F.Id(S.Static), F.Id(S.Readonly),
F.Var(SetType, setName,
ApiCall(method, new RVList<LNode>(args.Select(a => F.Literal(a))), true)));
}
