Is there a way to get the PREMATCH ($`) and POSTMATCH ($') from pcrecpp?
- by Eric Peers
Is there a way to obtain the C++ equivalent of Perl's PREMATCH ($`) and POSTMATCH ($') from pcrecpp? I would be happy with a string, a char *, or pairs indices/startpos+length that point at this.
StringPiece seems like it might accomplish part of this, but I'm not certain how to get it.
in perl:
$_ = "Hello world";
if (/lo\s/) {
$pre = $`; #should be "Hel"
$post = $'; #should be "world"
}
in C++ I would have something like:
string mystr = "Hello world"; //do I need to map this in a StringPiece?
if (pcrecpp::RE("lo\s").PartialMatch(mystr)) { //should I use Consume or FindAndConsume?
//What should I do here to get pre+post matches???
}
pcre plainjane c seems to have the ability to return the vector with the matches including the "end" portion of the string, so I could theoretically extract such a pre/post variable, but that seems like a lot of work. I like the simplicty of the pcrecpp interface.
Suggestions? Thanks!
--Eric
