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feat(eslint-plugin): add `no-unnecessary-type-constraint` rule #2516


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@JoshuaKGoldberg JoshuaKGoldberg commented Sep 8, 2020

Fixes #2107.

If a type parameter inside a type parameter declaration includes a constraint and that constraint includes the Any or Unknown flag, that's an error.

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@typescript-eslint typescript-eslint bot commented Sep 8, 2020

Thanks for the PR, @JoshuaKGoldberg!

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@JoshuaKGoldberg JoshuaKGoldberg force-pushed the JoshuaKGoldberg:no-unnecessary-type-constraint branch from e0ee9ae to 23e14f2 Sep 8, 2020
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@codecov codecov bot commented Sep 8, 2020

Codecov Report

Merging #2516 into master will decrease coverage by 0.06%.
The diff coverage is 91.78%.

@@            Coverage Diff             @@
##           master    #2516      +/-   ##
- Coverage   92.81%   92.75%   -0.07%     
  Files         290      296       +6     
  Lines        9453     9739     +286     
  Branches     2647     2733      +86     
+ Hits         8774     9033     +259     
- Misses        322      332      +10     
- Partials      357      374      +17     
Flag Coverage Δ
#unittest 92.75% <91.78%> (-0.07%) ⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files Coverage Δ
packages/eslint-plugin/src/configs/all.ts 100.00% <ø> (ø) 86.48% <ø> (ø)
...nt-plugin/src/rules/lines-between-class-members.ts 85.71% <ø> (ø)
...-plugin/src/rules/no-unnecessary-type-assertion.ts 97.10% <ø> (ø)
...plugin/src/rules/prefer-string-starts-ends-with.ts 97.86% <ø> (ø)
...ges/experimental-utils/src/ts-eslint/RuleTester.ts 100.00% <ø> (ø)
packages/eslint-plugin/src/rules/dot-notation.ts 84.21% <66.66%> (-2.46%) ⬇️
...ackages/eslint-plugin/src/rules/no-implied-eval.ts 93.75% <66.66%> (-2.81%) ⬇️
.../eslint-plugin/src/rules/method-signature-style.ts 87.20% <78.04%> (-5.65%) ⬇️ 92.50% <80.00%> (-1.87%) ⬇️
... and 33 more
@JoshuaKGoldberg JoshuaKGoldberg force-pushed the JoshuaKGoldberg:no-unnecessary-type-constraint branch from 23e14f2 to 592e282 Sep 8, 2020
@JoshuaKGoldberg JoshuaKGoldberg marked this pull request as ready for review Sep 8, 2020
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@bradzacher bradzacher left a comment

the logic itself LGTM - a few minor comments.
Thanks for working on this

@bradzacher bradzacher changed the title feat(eslint-plugin): add no-unnecessary-type-constraint rule feat(eslint-plugin): add `no-unnecessary-type-constraint` rule Sep 28, 2020
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@bradzacher bradzacher left a comment

one last minor comment then we're good to go!

@bradzacher bradzacher merged commit 880ac75 into typescript-eslint:master Oct 26, 2020
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Unit tests Unit tests
Code style and lint
Run integration tests on primary Node.js version
Run unit tests on other Node.js versions (10.x)
Run unit tests on other Node.js versions (14.x)
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Semantic Pull Request ready to be squashed
@JoshuaKGoldberg JoshuaKGoldberg deleted the JoshuaKGoldberg:no-unnecessary-type-constraint branch Oct 26, 2020
This was referenced Oct 26, 2020
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