impl Default for collection iterators that don't already have it
#128261
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This implements
These are trait impls and therefore instantly stable. @rfcbot fcp merge |
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Team member @Amanieu has proposed to merge this. The next step is review by the rest of the tagged team members: No concerns currently listed. Once a majority of reviewers approve (and at most 2 approvals are outstanding), this will enter its final comment period. If you spot a major issue that hasn't been raised at any point in this process, please speak up! See this document for info about what commands tagged team members can give me. |
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Implement Default for iterators See rust-lang/rust#128261 for a similar PR for some libstd iterators. In order to do a similar PR for the `HashSet` and `HashMap` types, we need to make these changes to `hashbrown` first to actually implement them. One small caveat is that I chose to only implement `Default` for `RawIter` and not `RawIterRange`, since it really exists as an implementation detail anyway, and the best implementation would involve just using the `RawIter` implementation anyway.
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The final comment period, with a disposition to merge, as per the review above, is now complete. As the automated representative of the governance process, I would like to thank the author for their work and everyone else who contributed. This will be merged soon. |
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…iaskrgr Rollup of 8 pull requests Successful merges: - rust-lang#128221 (Add implied target features to target_feature attribute) - rust-lang#128261 (impl `Default` for collection iterators that don't already have it) - rust-lang#128353 (Change generate-copyright to generate HTML, with cargo dependencies included) - rust-lang#128679 (codegen: better centralize function declaration attribute computation) - rust-lang#128732 (make `import.vis` is immutable) - rust-lang#128755 (Integrate crlf directly into related test file instead via of .gitattributes) - rust-lang#128772 (rustc_codegen_ssa: Set architecture for object crate for 32-bit SPARC) - rust-lang#128782 (unused_parens: do not lint against parens around &raw) r? `@ghost` `@rustbot` modify labels: rollup
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Rollup merge of rust-lang#128261 - clarfonthey:iter-default, r=dtolnay impl `Default` for collection iterators that don't already have it There is a pretty strong precedent for implementing `Default` for collection iterators, and this does so for some where this implementation was missed. I don't think this needs a separate ACP (since this precedent already exists, and these feel like they were just missed), however, it *will* need an FCP since these implementations are instantly stable.
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…olnay impl `Default` for `HashMap`/`HashSet` iterators that don't already have it This is a follow-up to rust-lang#128261 that isn't included in that PR because it depends on: * [x] rust-lang/hashbrown#542 (`Default`) * [x] `hashbrown` release containing above It also wasn't included in rust-lang#128261 initially and should have its own FCP, since these are also insta-stable. Changes added: * `Default for hash_map::{Iter, IterMut, IntoIter, IntoKeys, IntoValues, Keys, Values, ValuesMut}` * `Default for hash_set::{Iter, IntoIter}` Changes that were added before FCP, but are being deferred to later: * `Clone for hash_map::{IntoIter, IntoKeys, IntoValues} where K: Clone, V: Clone` * `Clone for hash_set::IntoIter where K: Clone`
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There is a pretty strong precedent for implementing
Defaultfor collection iterators, and this does so for some where this implementation was missed.I don't think this needs a separate ACP (since this precedent already exists, and these feel like they were just missed), however, it will need an FCP since these implementations are instantly stable.