regex backwar looking assertion

[anonymous]

The perl expression (?<=.{3,3}).{6,6} passed in to boost regex results in Unmatched [ or [

?<= signifies a backward looking positive assertion so a pattern match should be returning 6 characters starting at offset 4 This works fine in perl. Any idea what part of the pattern is causing the issue?

thanks

Mark

[Steven Watanabe]

What compiler? It works for me with Visual Studio 2008 and Boost 1.36.0

#include <boost/regex.hpp>
#include <iostream>

int main() {
    boost::regex r("(?<=.{3,3}).{6,6}");

    std::cout << boost::regex_search("...122340", r) << std::endl;
}

[anonymous]

Works for me too, closing this for now, please reopen if you have a test case that demonstrates the issue with Boost-1.38.

John Maddock