/// <summary>
/// Initializes a new instance of the <see cref = "RegExp" /> class from a string.
/// </summary>
/// <param name = "s">A string with the regular expression.</param>
/// <param name = "syntaxFlags">Boolean 'or' of optional syntax constructs to be enabled.</param>
internal RegExp(string s, RegExpSyntaxOptions syntaxFlags)
{
this.b = RegExp.ReplaceShorthandCharacterClasses(s);
this.flags = syntaxFlags;
RegExp e;
if (s.Length == 0)
{
e = RegExp.MakeString(string.Empty);
}
else
{
e = this.ParseUnionExp();
if (this.pos < this.b.Length)
{
throw new ArgumentException("end-of-string expected at position " + this.pos);
}
}
this.kind = e.kind;
this.exp1 = e.exp1;
this.exp2 = e.exp2;
this.s = e.s;
this.c = e.c;
this.min = e.min;
this.max = e.max;
this.digits = e.digits;
this.from = e.from;
this.to = e.to;
this.b = null;
}
