Auto merge of #118032 - RalfJung:char-u32, r=Mark-Simulacrum

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guarantee that char and u32 are ABI-compatible

In https://github.com/rust-lang/rust/pull/116894 we added a guarantee that `char` has the same alignment as `u32`, but there is still one axis where these types could differ: function call ABI. So let's nail that down as well: in a function signature, `char` and `u32` are completely equivalent.

This is a new stable guarantee, so it will need t-lang approval.

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bors 2023-12-11 04:13:19 +00:00

parent abcf944e63 adb53357ff

commit eebafa22a1

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