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Lint .flat_map(|x| x) into .flatten() #4224

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LunaBorowska opened this issue Jun 21, 2019 · 1 comment · Fixed by #4231
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Lint .flat_map(|x| x) into .flatten() #4224

LunaBorowska opened this issue Jun 21, 2019 · 1 comment · Fixed by #4231
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A-lint Area: New lints good first issue These issues are a good way to get started with Clippy L-complexity Lint: Belongs in the complexity lint group L-suggestion Lint: Improving, adding or fixing lint suggestions

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@LunaBorowska
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LunaBorowska commented Jun 21, 2019 •
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Clippy should suggest using .flatten() instead of .flat_map(|x| x).
@flip1995 flip1995 added L-complexity Lint: Belongs in the complexity lint group L-suggestion Lint: Improving, adding or fixing lint suggestions good first issue These issues are a good way to get started with Clippy A-lint Area: New lints labels Jun 21, 2019
@jeremystucki jeremystucki mentioned this issue Jun 24, 2019
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@lopopolo
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.flat_map(std::convert::identity) too 😄

bors added a commit that referenced this issue Aug 14, 2019
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Auto merge of #4231 - jeremystucki:flat-map, r=flip1995
2cf7ee5 
Implement flat_map lint

Fixes #4224

changelog: New Lint `flat_map_identity` to detect unnecessary calls to `flat_map`
bors added a commit that referenced this issue Aug 14, 2019
@bors
Auto merge of #4231 - jeremystucki:flat-map, r=flip1995
4f8bdf3 
Implement flat_map lint

Fixes #4224

changelog: New Lint `flat_map_identity` to detect unnecessary calls to `flat_map`
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A-lint Area: New lints good first issue These issues are a good way to get started with Clippy L-complexity Lint: Belongs in the complexity lint group L-suggestion Lint: Improving, adding or fixing lint suggestions
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Implement flat_map lint
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@lopopolo @LunaBorowska @flip1995