Add new lint iter_not_returning_iterator
#7610
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r? @camsteffen (rust-highfive has picked a reviewer for you, use r? to override) |
| let parameters = fn_sig.decl.inputs; | ||
| if parameters.is_empty() || parameters.len() > 1 { | ||
| return; | ||
| } |
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Why check for number of parameters?
Shouldn't this lint work for an iter that takes parameters other than self?
Or maybe this is covered by another lint?
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I think it should only detect fn iter(&self) -> _ before, because I think if it has more parameters it may have a different meaning, so this lint may not suit it.
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You can use if let [param] = fn_sig.decl.inputs. The if_chains can be collapsed. Can you also check that the parameter is &self?
| if parameters.is_empty() || parameters.len() > 1 { | ||
| return; | ||
| } | ||
| let iter_trait_id = get_trait_def_id(cx, &paths::ITERATOR).unwrap(); |
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This will crash on any no_std crate or maybe even when linting the standard library itself. You should just return when this trait can't be found.
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@Labelray Thanks for the PR. This is a good idea. I do have one concern though... When GAT arrives (coming soon according to this blog post), iterators that are not |
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Shouldn't this be covered by |
I think not. [ |
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☔ The latest upstream changes (presumably #7604) made this pull request unmergeable. Please resolve the merge conflicts. |
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I think it's fine to have this lint until GATs arrive; the streaming iter trait might end up using a different signature, or we can check for both. Bit concerned the lint name is too long though. |
Will it be a good idea to name it as |
| let parameters = fn_sig.decl.inputs; | ||
| if parameters.is_empty() || parameters.len() > 1 { | ||
| return; | ||
| } |
There was a problem hiding this comment.
You can use if let [param] = fn_sig.decl.inputs. The if_chains can be collapsed. Can you also check that the parameter is &self?
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Can you do a rebase, not a merge? |
returned_iter_not_implementing_iteratoriter_not_returning_iterator
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Thanks! @bors r+ |
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📌 Commit 8f88acd has been approved by |
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☀️ Test successful - checks-action_dev_test, checks-action_remark_test, checks-action_test |
Add new lint [
iter_not_returning_iterator] to detect methoditer()oriter_mut()returning a type not implementingIteratorchangelog: Add new lint [
iter_not_returning_iterator]