Subject: Re: [boost] [Filesystem V3] Filesystem Version 3 beta 1 availablefor download and comment
From: Beman Dawes (bdawes_at_[hidden])
Date: 2010-02-23 17:01:06
On Tue, Feb 23, 2010 at 12:28 AM, Jeffrey Bosboom <jbosboom_at_[hidden]> wrote:
> 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';
> 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've added the above example to the reference docs.
> 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.
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