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Rename to {u,i}*::reinterpret_{signed,unsigned} from cast #136489

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@tbu- tbu- commented Feb 3, 2025

The previous names did not communicate what happens to values of unsigned integers that do not fit into the target integer values.

We're reinterpreting the bits as an unsigned integer, but "cast" does not say that. E.g. casting from integer to float does not reinterpret the bits, casting from i8 to i32 does not solely reinterpret the bits either, it sign-extends them. So "cast" doesn't tell me what happens.

CC #125882 (comment)

The previous names did not communicate what happens to values of
unsigned integers that do not fit into the target integer values.

We're reinterpreting the bits as an unsigned integer, but "cast" does
not say that. E.g. casting from integer to float does not reinterpret
the bits, casting from `i8` to `i32` does not solely reinterpret the
bits either, it sign-extends them. So "cast" doesn't tell me what
happens.
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rustbot commented Feb 3, 2025

r? @Amanieu

rustbot has assigned @Amanieu.
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@rustbot rustbot added S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. T-libs Relevant to the library team, which will review and decide on the PR/issue. labels Feb 3, 2025
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tbu- commented Feb 3, 2025

Blocked on the discussion that just started in #125882.

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tbu- commented Feb 3, 2025

@rustbot blocked

@rustbot rustbot added S-blocked Status: Blocked on something else such as an RFC or other implementation work. and removed S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. labels Feb 3, 2025
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