Update functions in Result and Either to be iterator-based #8471
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added 3 commits
August 13, 2013 16:20
Remove the only use of either::partition since it was better accomplished with vector methods. Update either::partition so that it sizes the vectors correctly before it starts.
Replace these with three functions based on iterators: collect, fold, and fold_. The mapping part is replaced by iterator .map(), so the part that these functions do is to accumulate the final Result<,> value. * `result::collect` gathers `Iterator<Result<V, U>>` to `Result<~[V], U>` * `result::fold` folds `Iterator<Result<T, E>>` to `Result<V, E>` * `result::fold_` folds `Iterator<Result<T, E>>` to `Result<(), E>`
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Rebased to squash together some changes to the PR. Keep |
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rollup candidate |
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bors
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Aug 16, 2013
Retry of PR #8471 Replace the remaining functions marked for issue #8228 with similar functions that are iterator-based. Change `either::{lefts, rights}` to be iterator-filtering instead of returning a vector. Replace `map_vec`, `map_vec2`, `iter_vec2` in std::result with three functions: * `result::collect` gathers `Iterator<Result<V, U>>` to `Result<~[V], U>` * `result::fold` folds `Iterator<Result<T, E>>` to `Result<V, E>` * `result::fold_` folds `Iterator<Result<T, E>>` to `Result<(), E>`
flip1995
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Mar 14, 2022
new lint that detects useless match expression fixes rust-lang#7040 changelog: Add new lint [`needless_match`] under complexity lint group
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Replace the remaining functions marked for issue #8228 with similar functions that are iterator-based.
Change
either::{lefts, rights}to be iterator-filtering instead of returning a vector.Replace
map_vec,map_vec2,iter_vec2in std::result with three functions:result::collectgathersIterator<Result<V, U>>toResult<~[V], U>result::foldfoldsIterator<Result<T, E>>toResult<V, E>result::fold_foldsIterator<Result<T, E>>toResult<(), E>