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Lint unnecessary int-to-int and float-to-float casts #6187

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merged 6 commits into from
Oct 24, 2020

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geoffreycopin
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This is an implementation of a lint that detects unnecessary casts of number literals, as discussed here:
#6116


changelog: lint unnecessary as-casts of literals when they could be written using literal syntax.

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Thanks for the pull request, and welcome! The Rust team is excited to review your changes, and you should hear from @ebroto (or someone else) soon.

If any changes to this PR are deemed necessary, please add them as extra commits. This ensures that the reviewer can see what has changed since they last reviewed the code. Due to the way GitHub handles out-of-date commits, this should also make it reasonably obvious what issues have or haven't been addressed. Large or tricky changes may require several passes of review and changes.

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@rust-highfive rust-highfive added the S-waiting-on-review Status: Awaiting review from the assignee but also interested parties label Oct 17, 2020
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Could you add a short note about the new behavior in the lint documentation?

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@ebroto ebroto added S-waiting-on-author Status: This is awaiting some action from the author. (Use `@rustbot ready` to update this status) and removed S-waiting-on-review Status: Awaiting review from the assignee but also interested parties labels Oct 18, 2020
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ebroto commented Oct 22, 2020

The problem with the CI is that the fixed file fails to compile. You can avoid the error by using a let binding, e.g.

let _ = -1 as i32;

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ebroto commented Oct 24, 2020

@bors r+

Thanks!

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bors commented Oct 24, 2020

📌 Commit d46edd9 has been approved by ebroto

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bors commented Oct 24, 2020

⌛ Testing commit d46edd9 with merge 4a2d09a...

bors added a commit that referenced this pull request Oct 24, 2020
Lint unnecessary int-to-int and float-to-float casts

This is an implementation of a lint that detects unnecessary casts of number literals, as discussed here:
#6116

---

changelog: lint unnecessary as-casts of literals when they could be written using literal syntax.
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bors commented Oct 24, 2020

💔 Test failed - checks-action_test

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ebroto commented Oct 24, 2020

It seems keeping the separators broke tests for another lint.

I think that's an improvement so we should just update the stderr files for that lint

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ebroto commented Oct 24, 2020

@bors r+

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bors commented Oct 24, 2020

📌 Commit 71ac0c0 has been approved by ebroto

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bors commented Oct 24, 2020

⌛ Testing commit 71ac0c0 with merge b06856e...

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bors commented Oct 24, 2020

☀️ Test successful - checks-action_dev_test, checks-action_remark_test, checks-action_test
Approved by: ebroto
Pushing b06856e to master...

@bors bors merged commit b06856e into rust-lang:master Oct 24, 2020
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