Question

I have the following method in some nemerle code:

private static getLinks(text : string) : array[string] {         def linkrx = Regex(@'<a\shref=['|\'](.*?)['|\'].*?>');         def m = linkrx.Matches(text);         mutable txmatches : array[string];         for (mutable i = 0; i < m.Count; ++i) {             txmatches[i] = m[i].Value;         }         txmatches     } 

the problem is that the compiler for some reason is trying to parse the brackets inside the regex statement and its causing the program to not compile. If i remove the @, (which i was told to put there) i get an invalid escape character error on the ‘\s’

Heres the compiler output:

NCrawler.n:23:21:23:22: ←[01;31merror←[0m: when parsing this `(' brace group NCrawler.n:23:38:23:39: ←[01;31merror←[0m: unexpected closing bracket `]' NCrawler.n:22:57:22:58: ←[01;31merror←[0m: when parsing this `{' brace group NCrawler.n:23:38:23:39: ←[01;31merror←[0m: unexpected closing bracket `]' NCrawler.n:8:1:8:2: ←[01;31merror←[0m: when parsing this `{' brace group NCrawler.n:23:38:23:39: ←[01;31merror←[0m: unexpected closing bracket `]' NCrawler.n:23:38:23:39: ←[01;31merror←[0m: unexpected closing bracket `]' 

(line 23 is the line with the regex code on it)

What should I do?

Answer 1

I don’t know Nemerle, but it seems like using @ disables all escapes, including the escape for the '.

Try one of these:

def linkrx = Regex('<a\\shref=['\'](.*?)['\'].*?>');  def linkrx = Regex(@'<a\shref=['''](.*?)['''].*?>');  def linkrx = Regex(@'<a\shref=['\x22](.*?)['\x22].*?>');