[PATCH] D147495: [Clang][Attributes] Add MeaningfulToClassTemplateDefinition to unavailable attribute

[Aaron Ballman via Phabricator via cfe-commits]

aaron.ballman accepted this revision.
aaron.ballman added a comment.
This revision is now accepted and ready to land.

LGTM, though please add a release note about the fix. I don't *think* this qualifies as a potentially breaking change, though it does theoretically have the ability to cause code which previously compiled to no longer compile. At least, my search over sourcegraph didn't come up with any results (https://sourcegraph.com/search?q=context:global+lang:C%2B%2B+-file:.*test.*+template+%3Ctypename%7Cclass+.*%3E+__attribute__%5C%28%5C%28unavailable&patternType=regexp&sm=1&groupBy=repo).


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https://reviews.llvm.org/D147495