Hello, I discovered this bug by accident

https://svn.boost.org/trac/boost/changeset/68866

which was only linked via the ticket mentioned below,

The code below demonstrates that ANY wide-character string of the same length resolves to the same UUID !

Thats pretty darn serious, I expected to see a much more serious mention in the Changelog in boost 1.47.0... for UUID, there was only a mention of a few tickets

including this one:

https://svn.boost.org/trac/boost/ticket/5145

which only mentioned a WARNING in the description !

"Fixed warning: use of logical && with constant operand; switch to bitwise & or remove constant [-Wconstant-logical-operand]"

Surely it should say something like "UUIDs for wide character strings are totally wrong"

Note also that the Changelog link for UUID goes to Utility, not UUID.

The code:

#include <boost/uuid/name_generator.hpp>

#include <boost/uuid/nil_generator.hpp>

#include <boost/uuid/uuid_io.hpp>

#include <iostream>

using namespace boost::uuids;

using namespace std;

int main()

{

cout << "WIDE" << endl;

const wchar_t* a = L"one long string that is something like this and that blahh";

const wchar_t* b = L"hello there you long long string that looks nothing like t";

nil_generator nil;

name_generator na(nil());

name_generator nb(nil());

uuid ua = na(a);

uuid ub = nb(b);

cout << to_string(ua) << endl;

cout << to_string(ub) << endl;

}

{

cout << "NARROW" << endl;

const char* a = "one long string that is something like this and that blahh";

const char* b = "hello there you long long string that looks nothing like t";

nil_generator nil;

name_generator na(nil());

name_generator nb(nil());

uuid ua = na(a);

uuid ub = nb(b);

cout << to_string(ua) << endl;

cout << to_string(ub) << endl;

}

return 0;

}

the result:

$ g++ main.cpp && ./a.out

WIDE

4ffa48af-9685-5089-97ac-fe6627ead94c

NARROW

73030b72-a864-5c7b-9963-c0bedff1283e

da8943a6-26c9-5641-bd37-427b1b70d619

The two different wchar_t strings resolve to the same uuid !!!

What am I doing wrong?

thanks

Paul