[Bug libstdc++/71500] regex::icase only works on first character in a range

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71500

Jonathan Wakely <redi at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2017-08-29
     Ever confirmed|0                           |1

--- Comment #15 from Jonathan Wakely <redi at gcc dot gnu.org> ---


Another testcase from Bug 77492:

#include <iostream>
#include <regex>

using namespace std;

void check(const string& s, regex re) {
    cout << s << " : " << (regex_match(s, re) ? "Match" : "Nope") << endl;
}

int main() {
    regex re1 = regex("([a-z]+) \\1", regex::icase);
    check("abc abc", re1);
    check("Abc abc", re1);
    check("abc Abc", re1);
}

output:
abc abc : Match
Abc abc : Nope
abc Abc : Nope


Tim, your patch didn't change the behaviour for this - is that expected?