Implement useful steps_between for all integers #59444
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r? @kennytm (rust_highfive has picked a reviewer for you, use r? to override) |
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We can use `usize::try_from` to convert steps from any size of integer. This enables a meaningful `size_hint()` for larger ranges, rather than always just `(0, None)`. Now they return the true `(len, Some(len))` when it fits, otherwise `(usize::MAX, None)` for overflow.
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r? @scottmcm |
Note, this former behavior meant that a lot of the |
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Ping from triage, @scottmcm :) |
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Implement useful steps_between for all integers We can use `usize::try_from` to convert steps from any size of integer. This enables a meaningful `size_hint()` for larger ranges, rather than always just `(0, None)`. Now they return the true `(len, Some(len))` when it fits, otherwise `(usize::MAX, None)` for overflow.
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Rollup of 8 pull requests Successful merges: - #59262 (Remove duplicated code from Iterator::{ne, lt, le, gt, ge}) - #59286 (Refactor async fn return type lowering) - #59444 (Implement useful steps_between for all integers) - #59452 (Speed up rustdoc run a bit) - #59533 (Support allocating iterators with arenas) - #59585 (Fixes for shallow borrows) - #59607 (Renames `EvalErrorKind` to `InterpError`) - #59613 (SGX target: convert a bunch of panics to aborts) Failed merges: - #59630 (Shrink `mir::Statement`.) r? @ghost
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@scottmcm great, thanks for the added background! |
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We can use
usize::try_fromto convert steps from any size of integer.This enables a meaningful
size_hint()for larger ranges, rather thanalways just
(0, None). Now they return the true(len, Some(len))when it fits, otherwise
(usize::MAX, None)for overflow.