[PATCH 00/12] remove some cleanups using a cleanup function
Tom Tromey
tom@tromey.com
Wed Jan 9 03:34:00 GMT 2019
This is the series to introduce a new cleanup_function class, that can
be used in situations where a simple function call is needed to do
some cleanup.
As I mentioned in the other thread, I was (and still am) uncertain as
to whether this is a good idea. My worry is just that this will be
used in ways leading to unclear code. (You can judge for yourself
whether this series has already entered that territory...)
A couple of rules I used when deciding when to use the new class:
* There should not be too many uses of the existing cleanup (one or
two). If there are more than several it should probably be a
bespoke class.
* Any lambdas should capture only a small number of things (one or
maybe two), and only capture by value should be used.
Hopefully I actually followed these.
I wonder if the new class should take a std::function rather than a
gdb::function_view. Some of the changes needs a bit of extra code to
deal with the latter.
Also I wonder if it should be possible to default-construct a
cleanup_function, and then set it later. This would eliminate some
uses of gdb::optional; and seemed maybe reasonable given that the
class already has to maintain a (sort of-) validity flag.
This series includes a couple of cleanup-related comment fixes for
things I happened to notice along the way.
Regression tested by the buildbot.
Tom
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