/*
* This static call constructs a RegexTree from a regular expression
* pattern string and an option string.
*
* The method creates, drives, and drops a parser instance.
*/
internal static RegexTree Parse(string re, RegexOptions op)
{
var culture = op.HasAnyFlags(RegexOptions.CultureInvariant)
? CultureInfo.InvariantCulture
: CultureInfo.CurrentCulture;
var p = new RegexParser(culture)
{
_options = op
};
p.SetPattern(re);
p.Reset(op);
var root = p.ScanRegex();
return(new RegexTree(root, op));
}