Re: Getting Error Text from ifstream

coming from C, I'm used to somthing like this when opening a file

const char *foobar = "this.txt";
FILE *f;
f = fopen(foobar, "r");
if (!f) {
  fprintf(stderr, "Couldn't open %s: %s\n", foobar, strerror(errno));
  exit(EXIT_FAILURE);
}

translating that somewhat to C++ yields me with

const char *foobar = "this.txt";
std::ifstream f(foobar);
if (!f) {
  throw GenericException("Couldn't open file.");
}

So I can detect that opening the file wasn't successful, but I
don't know *why* (i.e. permissions, no such file or directory,
etc.). My guess is that strerror and errno still do what I
expect them to do, however I think that would be a very C-way
to solve things.

How can I accomplish strerror(errno) on the std::ifstream with
C++ means?