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feat(eslint-plugin): [no-shadow] add shadowed variable location to the error message #5183

merged 2 commits into from Jun 26, 2022


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@bradzacher bradzacher commented Jun 13, 2022

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I noticed that we had missed eslint/eslint#13841. This is a pretty valuable upstream change which greatly improves the error message.

Whilst I was here I also followed the same test structure for no-unused-vars where we separate the tests from upstream eslint into a separate file from our local tests.
I did this now because I noticed that someone had added tests for our logic to the "eslint tests" section - so when I pasted the upstream tests I deleted a bunch of tests!
It shouldn't be an issue in future.

@bradzacher bradzacher added the enhancement New feature or request label Jun 13, 2022
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@codecov codecov bot commented Jun 13, 2022

Codecov Report

Merging #5183 (a58c221) into main (2600f7f) will increase coverage by 2.43%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main    #5183      +/-   ##
+ Coverage   91.33%   93.76%   +2.43%     
  Files         132      287     +155     
  Lines        1488     9868    +8380     
  Branches      224     2952    +2728     
+ Hits         1359     9253    +7894     
- Misses         65      335     +270     
- Partials       64      280     +216     
Flag Coverage Δ
unittest 93.76% <100.00%> (+2.43%) ⬆️

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

Impacted Files Coverage Δ
packages/eslint-plugin/src/rules/no-shadow.ts 75.84% <100.00%> (ø)
...plugin/src/rules/naming-convention-utils/shared.ts 100.00% <0.00%> (ø)
...rc/rules/indent-new-do-not-use/BinarySearchTree.ts 100.00% <0.00%> (ø)
...ackages/eslint-plugin/src/rules/no-for-in-array.ts 100.00% <0.00%> (ø)
...slint-plugin/src/rules/no-unnecessary-condition.ts 98.30% <0.00%> (ø)
...ackages/eslint-plugin/src/rules/no-invalid-this.ts 80.00% <0.00%> (ø)
.../eslint-plugin/src/rules/promise-function-async.ts 98.03% <0.00%> (ø)
.../src/rules/sort-type-union-intersection-members.ts 90.74% <0.00%> (ø)
packages/eslint-plugin/src/rules/unbound-method.ts 92.13% <0.00%> (ø)
...src/rules/naming-convention-utils/parse-options.ts 100.00% <0.00%> (ø)
... and 146 more

JoshuaKGoldberg previously approved these changes Jun 25, 2022
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@JoshuaKGoldberg JoshuaKGoldberg left a comment

Super, thank you!

packages/eslint-plugin/src/rules/no-shadow.ts Outdated Show resolved Hide resolved
return {
global: true,
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@JoshuaKGoldberg JoshuaKGoldberg Jun 25, 2022

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Nitty nit: could be simplified to return identifier ? { ... } : { ... };.

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@bradzacher bradzacher Jun 26, 2022

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you really do love your ternaries 😄
personally I prefer to only use ternaries for when I want an expression.
I find in this case where I can do everything with statements - using an if statement is clearer and cleaner.

@bradzacher bradzacher merged commit 8ca08e9 into main Jun 26, 2022
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@bradzacher bradzacher deleted the shadowed-variable-loc branch Jun 26, 2022
crapStone pushed a commit to Calciumdibromid/CaBr2 that referenced this issue Jun 28, 2022
This PR contains the following updates:

| Package | Type | Update | Change |
| [@typescript-eslint/eslint-plugin]( | devDependencies | minor | [`5.29.0` -> `5.30.0`]( |
| [@typescript-eslint/parser]( | devDependencies | minor | [`5.29.0` -> `5.30.0`]( |


### Release Notes

<summary>typescript-eslint/typescript-eslint (@&#8203;typescript-eslint/eslint-plugin)</summary>

### [`v5.30.0`](;5300-httpsgithubcomtypescript-eslinttypescript-eslintcomparev5290v5300-2022-06-27)

[Compare Source](typescript-eslint/typescript-eslint@v5.29.0...v5.30.0)

##### Features

-   **eslint-plugin:** \[no-shadow] add shadowed variable location to the error message ([#&#8203;5183](typescript-eslint/typescript-eslint#5183)) ([8ca08e9](typescript-eslint/typescript-eslint@8ca08e9))
-   treat `this` in `typeof this` as a `ThisExpression` ([#&#8203;4382](typescript-eslint/typescript-eslint#4382)) ([b04b2ce](typescript-eslint/typescript-eslint@b04b2ce))


<summary>typescript-eslint/typescript-eslint (@&#8203;typescript-eslint/parser)</summary>

### [`v5.30.0`](;5300-httpsgithubcomtypescript-eslinttypescript-eslintcomparev5290v5300-2022-06-27)

[Compare Source](typescript-eslint/typescript-eslint@v5.29.0...v5.30.0)

**Note:** Version bump only for package [@&#8203;typescript-eslint/parser](



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 **Rebasing**: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox.

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This PR has been generated by [Renovate Bot](

Co-authored-by: cabr2-bot <>
Reviewed-by: Epsilon_02 <>
Co-authored-by: Calciumdibromid Bot <>
Co-committed-by: Calciumdibromid Bot <>
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