On 2/21/2010 8:00 AM, Beman Dawes wrote:
One wrinkle that I never was able to decide how to handle was multiple extensions, like ".tar.gz". Some use cases would want ".tar.gz", some would just want ".gz", and a few would even want just ".tar". Does this library provide any direct support for managing chains of extensions like that?
The design decision for stem() to return just the last extension rather than the entire chain allows a user to visit each element in the chain. For example,
path p = "foo.bar.baz.tar.bz2"; for (; !p.extension().empty(); p = p.stem()) cout<< p.extension()<< '\n';
displays:
.bz2 .tar .baz .bar
I can't find this anywhere in the documentation, and it's pretty important to note -- I wouldn't have considered that for-loop structure, probably resorting instead to finding the first period and splitting up the string. I don't think an iterator is necessary here, although it would have made the loop construction more obvious. I don't see a pressing need to pass extensions to functions that expect iterators. --Jeffrey Bosboom