Simon Giesecke e3d1db10d9 Bug 1626884 - Make RC non-copyable and declare operator= only in debug builds. r=froydnj
RC should be non-copyable. It already is non-copyable in the atomic variant,
but not in the non-atomic variant. This ensures that RefCounted is also
non-copyable, which prevents that classes deriving from RefCounted get
accidentally copied.

Also, RC's operator= should be defined only in debug builds. As already
described in a code comment, it's only used in debug builds (to assign the
dead value), and otherwise no modifications other than incrementing &
decrementing should be possible.

Differential Revision: https://phabricator.services.mozilla.com/D69332

--HG--
extra : moz-landing-system : lando
2020-04-06 09:17:34 +00:00
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