[llvm] [clang-tidy] Add performance-move-smart-pointer-contents check. (PR #66139)

[via llvm-commits]

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+.. title:: clang-tidy - performance-move-smart-pointer-contents
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+performance-move-smart-pointer-contents
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+Given a smart pointer containing a movable type, such as a
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pizzud wrote:

Done.

https://github.com/llvm/llvm-project/pull/66139