Rollup of 4 pull requests #70402
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Rollup of 4 pull requests #70402
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The former `done` flag was roughly similar to an `Option` tag, but left
the possibity of misuse. By using a real `Option`, we can set `None`
when the iterator is exhausted, removing any way to call it again. We
also allow niche layout this way, so the `Fuse` may be smaller.
The `FusedIterator` specialization does want to ignore the possibility
of exhaustion though, so it uses `unsafe { intrinsics::unreachable() }`
to optimize that branch away. The entire `Fuse` implementation is now
isolated in its own module to contain that unsafety.
InterpCtx => InterpCx (rustc_mir::interpret::InterpCx)
correctly normalize constants closes rust-lang#70317 implements rust-lang#70125 (comment) r? eddyb cc @varkor
Implement Fuse with Option
The former `done` flag was roughly similar to an `Option` tag, but left
the possibity of misuse. By using a real `Option`, we can set `None`
when the iterator is exhausted, removing any way to call it again. We
also allow niche layout this way, so the `Fuse` may be smaller.
The `FusedIterator` specialization does want to ignore the possibility
of exhaustion though, so it uses `unsafe { intrinsics::unreachable() }`
to optimize that branch away. The entire `Fuse` implementation is now
isolated in its own module to contain that unsafety.
r? @scottmcm
avoid catching InterpError Avoid raising and then capturing `InterpError` for the definedness check. Cc rust-lang#69297 r? @oli-obk
fix incorrect type name in doc comments Change : `InterpCtx` => `InterpCx` (`rustc_mir::interpret::InterpCx`)
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@bors r+ rollup=never p=4 |
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📌 Commit 43a4b69 has been approved by |
bors
added
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S-waiting-on-bors
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@bors r- |
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r? @ghost