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Fixing eta with respect to lazy evaluation. #4190

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merged 2 commits into from
Jun 10, 2019
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projedi
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@projedi projedi commented Jun 10, 2019

This fixes #4187

changelog: redundant_closure: stop linting on expressions returning a function, which is then directly used by the closure

@projedi projedi changed the title Fixing eta with respect to lazy evaluation. Closes #4187 Fixing eta with respect to lazy evaluation. Jun 10, 2019
@llogiq
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llogiq commented Jun 10, 2019

Oops. I did not see you were working on this and did (mostly) the same thing.

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projedi commented Jun 10, 2019

Oops. I did not see you were working on this and did (mostly) the same thing.

Oh, I didn't notice that you did it too. Well, I don't mind whose PR gets merged in, as long as the problem is fixed. I can close this one, if you like.

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Travis failure looks like a bug in rustfmt to me 🤔

-fn make_lazy(f: fn() -> fn(u8) -> u8) -> impl Fn(u8) -> u8 {
+fn make_lazy(f: fn() -> fn(u8) -> fn(u8) -> u8) -> impl Fn(u8) -> u8 {

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projedi commented Jun 10, 2019

Travis failure looks like a bug in rustfmt to me 🤔

-fn make_lazy(f: fn() -> fn(u8) -> u8) -> impl Fn(u8) -> u8 {
+fn make_lazy(f: fn() -> fn(u8) -> fn(u8) -> u8) -> impl Fn(u8) -> u8 {

I think you're right, opened rust-lang/rustfmt#3615 to track it. There's a workaround, though: changing type of f to impl Fn() -> fn(u8) -> u8.

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Thanks!

@bors r+

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bors commented Jun 10, 2019

📌 Commit 41a4ce5 has been approved by flip1995

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bors commented Jun 10, 2019

⌛ Testing commit 41a4ce5 with merge ba1702a...

bors added a commit that referenced this pull request Jun 10, 2019
Fixing eta with respect to lazy evaluation.

This fixes #4187

changelog: `redundant_closure`: stop linting on expressions returning a function, which is then directly used by the closure
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bors commented Jun 10, 2019

☀️ Test successful - checks-travis, status-appveyor
Approved by: flip1995
Pushing ba1702a to master...

@bors bors merged commit 41a4ce5 into rust-lang:master Jun 10, 2019
@projedi projedi deleted the fix-eta branch June 11, 2019 05:48
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clippy::redundant_closure false positive: laziness
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