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Remove unwrapping in error Is methods #2269

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merged 3 commits into from
Aug 3, 2023

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triarius
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@triarius triarius commented Aug 3, 2023

I was doing some "light reading" of the go standard library, and noticed this:

// ... An Is method should only shallowly
// compare err and the target and not call Unwrap on either.

In the former implementations, calling errors.As could unwrap the errors, so this PR fixes this.

@triarius triarius marked this pull request as ready for review August 3, 2023 06:03
@triarius triarius requested a review from a team August 3, 2023 06:03
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While we're here, you could update Errors to be Unwrap that returns []error. I don't think any call sites of Errors use anything other than the Error method.

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Done

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@DrJosh9000 DrJosh9000 left a comment

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Otherwise LGTM!

@triarius triarius force-pushed the pdp-1424-fix-error-is-method-unwraps branch from d0f5c92 to 2ee34ab Compare August 3, 2023 07:21
Comment on lines +43 to +46
out := make([]error, 0, len(errs))
for i := range errs {
out = append(out, &errs[i])
}
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I guess the alternative is to make errs have type []error, then type-assert everything in the sort.Slice closure...

Hang on, does anything use the order of e.errs?

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I think it's nice for the user. I wrote tests for it, so they will break

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Hmm. Maybe I didn't 🤷‍♂️. Still think it's nice for the user.

@triarius triarius merged commit ead9ebc into main Aug 3, 2023
@triarius triarius deleted the pdp-1424-fix-error-is-method-unwraps branch August 3, 2023 23:23
@DrJosh9000 DrJosh9000 added the cleanup Cleaning up code, refactoring, etc label Aug 7, 2023
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2 participants