private RegExp ParseCharClassExp()
{
if (this.Match('['))
{
bool negate = false;
if (this.Match('^'))
{
negate = true;
}
RegExp e = this.ParseCharClasses();
if (negate)
{
e = RegExp.MakeIntersection(RegExp.MakeAnyChar(), RegExp.MakeComplement(e));
}
if (!this.Match(']'))
{
throw new ArgumentException("expected ']' at position " + this.pos);
}
return(e);
}
return(this.ParseSimpleExp());
}
private RegExp ParseInterExp()
{
RegExp e = this.ParseConcatExp();
if (this.Check(RegExpSyntaxOptions.Intersection) && this.Match('&'))
{
e = RegExp.MakeIntersection(e, this.ParseInterExp());
}
return(e);
}