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Added from_over_into lint #6476

Merged
merged 5 commits into from
Dec 22, 2020
Merged

Added from_over_into lint #6476

merged 5 commits into from
Dec 22, 2020

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1c3t3a
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@1c3t3a 1c3t3a commented Dec 19, 2020 •
edited by llogiq
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Closes #6456
Added a lint that searches for implementations of Into<..> and suggests to implement From<..> instead, as it comes with a default implementation of Into. Category: style.

changelog: added from_over_into lint

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r? @llogiq

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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 Dec 19, 2020
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Only one nit and one suggestion for improvement. If you change the message, I'd be OK with merging and improving the span later.

clippy_lints/src/from_over_into.rs Outdated Show resolved Hide resolved
clippy_lints/src/from_over_into.rs
span_lint_and_help(
cx,
FROM_OVER_INTO,
item.span,
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That item might be quite large. We may want to reduce the span to the impl header.

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How exactly would I extract the impl header? Didn't find a proper span while looking through documentation.

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It's OK, we can do this as a follow-up PR.

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Oke. If it's fine with you I could work on this, I might just need a hint on extracting the imp header Span.

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ghost commented Dec 20, 2020

Does this require a MSRV setting? The From docs suggest that Into might be needed if supporting a version prior to 1.41.

Only implement Into when targeting a version prior to Rust 1.41 and converting to a type outside the current crate. From was not able to do these types of conversions in earlier versions because of Rust's orphaning rules. See Into for more details.

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1c3t3a commented Dec 20, 2020

Does this require a MSRV setting? The From docs suggest that Into might be needed if supporting a version prior to 1.41.

Only implement Into when targeting a version prior to Rust 1.41 and converting to a type outside the current crate. From was not able to do these types of conversions in earlier versions because of Rust's orphaning rules. See Into for more details.

That's a good point, I've missed that!

@1c3t3a 1c3t3a requested a review from llogiq December 20, 2020 15:45
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I forgot that we want items/types marked up as code in error messages. Once that is taken care of, I'll have this merged. Thank you!

@1c3t3a 1c3t3a requested a review from llogiq December 20, 2020 19:11
@llogiq @giraffate
Update clippy_lints/src/from_over_into.rs
0d6c128 
Co-authored-by: Takayuki Nakata <f.seasons017@gmail.com>
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llogiq commented Dec 21, 2020

Thanks everyone! @bors r+

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bors commented Dec 21, 2020

📌 Commit 0d6c128 has been approved by llogiq

bors added a commit that referenced this pull request Dec 21, 2020
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Auto merge of #6476 - 1c3t3a:1c3t3a-from-over-into, r=llogiq
74bce2d 
Added from_over_into lint

Closes #6456
Added a lint that searches for implementations of `Into<..>` and suggests to implement `From<..>` instead, as it comes with a default implementation of `Into`. Category: style.
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bors commented Dec 21, 2020

⌛ Testing commit 0d6c128 with merge 74bce2d...

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bors commented Dec 21, 2020

💔 Test failed - checks-action_test

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We need to update .stderr file to pass a test.

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llogiq commented Dec 22, 2020

@bors r+

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bors commented Dec 22, 2020

📌 Commit 53f4d43 has been approved by llogiq

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bors commented Dec 22, 2020

⌛ Testing commit 53f4d43 with merge 6d73885...

bors added a commit that referenced this pull request Dec 22, 2020
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Auto merge of #6476 - 1c3t3a:1c3t3a-from-over-into, r=llogiq
6d73885 
Added from_over_into lint

Closes #6456
Added a lint that searches for implementations of `Into<..>` and suggests to implement `From<..>` instead, as it comes with a default implementation of `Into`. Category: style.
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bors commented Dec 22, 2020

💔 Test failed - checks-action_test

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Oh, a test seems to fail due to lack of changelog: in PR.

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1c3t3a commented Dec 22, 2020

Oh, a test seems to fail due to lack of changelog: in PR.

Ahh I forgot to add the comment. I edited my PR opening comment, is that enough to make bors happy?

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llogiq commented Dec 22, 2020

Let's see. @bors r+

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bors commented Dec 22, 2020

💡 This pull request was already approved, no need to approve it again.

  • This pull request previously failed. You should add more commits to fix the bug, or use retry to trigger a build again.

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bors commented Dec 22, 2020

📌 Commit 53f4d43 has been approved by llogiq

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bors commented Dec 22, 2020

⌛ Testing commit 53f4d43 with merge 25e9acb...

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bors commented Dec 22, 2020

☀️ Test successful - checks-action_dev_test, checks-action_remark_test, checks-action_test
Approved by: llogiq
Pushing 25e9acb to master...

@bors bors merged commit 25e9acb into rust-lang:master Dec 22, 2020
@giraffate giraffate mentioned this pull request Jan 8, 2021
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bors added a commit that referenced this pull request Jan 8, 2021
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Auto merge of #6566 - giraffate:reduce_the_span_in_from_over_into, r=…
2950c8e 
…Manishearth

Reduce the span in `from_over_into` to impl header

A follow up of #6476 (comment)
> That item might be quite large. We may want to reduce the span to the `impl` header.

changelog: none
@Fishrock123 Fishrock123 mentioned this pull request Jan 19, 2021
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@camsteffen camsteffen mentioned this pull request Oct 26, 2021
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New lint: Implement From instead of Into
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