in java/src/main/java/com/twitter/twittertext/Extractor.java [283:299]
public String extractReplyScreenname(String text) {
if (text == null) {
return null;
}
Matcher matcher = Regex.VALID_REPLY.matcher(text);
if (matcher.find()) {
String after = text.substring(matcher.end());
if (Regex.INVALID_MENTION_MATCH_END.matcher(after).find()) {
return null;
} else {
return matcher.group(Regex.VALID_REPLY_GROUP_USERNAME);
}
} else {
return null;
}
}