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Subject: [boost] [1.44] [filesystem] operator +
From: Jochen Wilhelmy (j.wilhelmy_at_[hidden])
Date: 2010-08-25 05:22:51

> Note that Boost.Filesystem contains functions to retrieve and modify

>file extensions.

>In my opinion, introducing such a free + operator would be quite bad, as
>it would encourage use of it to glue on path segments in ways that may
>violate the format of paths for a platform, as in your example of an
>unconditional +"/bar", which would be horribly wrong for any platform
>that didn't use / as separator.

I know that I can exchange the current extension, but how can I add one
to a path that soes not have one? The current filename may already contain
dots therefore the addition of an extension should not check if there is
already one.
(e.g. "foo/bar.xy" + ".zw" -> "foo/")

I don't see any technical problem with + "/bar" since "/bar" is the
platform independent
notation and should therefore work on any platform. so far it is also
to do fs::path("foo/bar") where '/' is also the platform independent
therefore it should be equivalent to fs::path("foo") + "/bar".
but it would be ok to prevent this e.g. by throwing an exception.
something like path.add_extension(".bar") should be ok too.


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