/// <summary>
/// Constructs a regular expression.
/// </summary>
/// <param name="src"> The regular expression. </param>
public RegEx(string src)
{
ASTExpr ast = Parser.Parse(src);
if (ast == null)
{
throw new ArgumentException("Can't parse this regex. Sorry~");
}
NFATable nfaTable = ast.ToNFATable();
DFATable dfaTable = nfaTable.ToDFATable();
dfa = dfaTable.ToDFA();
}
