match_results relies on string evaluated by regex_search()

[David Klamet <davek@…>]

See example: If "text" is altered or destroyed, "matches" becomes invalid. Is this the desired behavior?

---

string pattern="
^{s*:(
S+)
s*"; string text=" :command ";}

boost::regex re(pattern);

boost::match_results<string::const_iterator> matches; bool stat=boost::regex_search(text, matches, re); text=""; Truncate string cout<<matches[1].str()<<endl; <<Throws sting iterator not dereferencable exception

[John Maddock]

This is by design: match_results store iterators, not strings.