Are `T` and `[T; 1]` guaranteed to have the same memory layout?

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Title says it all really.

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Yes, this is guaranteed by the existence of std::array::from_ref. Of course T must be Sized, otherwise [T; 1] is not even well-formed.

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This is also explicitly documented.

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That's awesome thanks all. I was sure I'd read it somewhere, but couldn't find it.

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