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Fix: no-useless-computed-key invalid autofix for getters and setters #8335

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merged 1 commit into from Mar 28, 2017

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What is the purpose of this pull request? (put an "X" next to item)

[x] Bug fix

Tell us about your environment

  • ESLint Version: master
  • Node Version: 7.7.4
  • npm Version: 4.1.2

What parser (default, Babel-ESLint, etc.) are you using?

default

Please show your full configuration:

rules:
  no-useless-computed-key: error

What did you do? Please include the actual source code causing the issue.

({ get[0]() {} });

What did you expect to happen?

I expected the code to be autofixed to

({ get 0() {} });

What actually happened? Please include the actual, raw output from ESLint.

The code was autofixed to

({ get0() {} });

What changes did you make? (Give an overview)

Previously, the no-useless-computed-key autofixer could sometimes place a key next to get, set, or async identifier in a property, causing the identifier and the key to combine and become a new identifier. This commit updates the autofixer to insert a space whenever that would happen to prevent the identifiers from combining.

Is there anything you'd like reviewers to focus on?

Nothing in particular

@not-an-aardvark not-an-aardvark added accepted There is consensus among the team that this change meets the criteria for inclusion bug ESLint is working incorrectly rule Relates to ESLint's core rules labels Mar 26, 2017
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@not-an-aardvark, thanks for your PR! By analyzing the history of the files in this pull request, we identified @BYK, @mysticatea and @kaicataldo to be potential reviewers.

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LGTM

Previously, the no-useless-computed-key autofixer could sometimes place a key next to `get`, `set`, or `async` identifier in a property, causing the identifier and the key to combine and become a new identifier. This commit updates the autofixer to insert a space whenever that would happen to prevent the identifiers from combining.
@not-an-aardvark not-an-aardvark force-pushed the no-useless-computed-key-identifier-joining branch from e30d1b2 to c79463a Compare March 27, 2017 00:08
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LGTM

// Insert a space before the key to avoid changing identifiers, e.g. ({ get[2]() {} }) to ({ get2() {} })
const needsSpaceBeforeKey = tokenBeforeLeftBracket.range[1] === leftSquareBracket.range[0] &&
esUtils.code.isIdentifierPartES6(tokenBeforeLeftBracket.value.slice(-1).charCodeAt(0)) &&
esUtils.code.isIdentifierPartES6(key.raw.charCodeAt(0));
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I think this logic might need to be extracted to ast-utils or similar (I've seen this in two PRs today).

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That's probably a good idea. I'll make a separate PR for it though.

@not-an-aardvark not-an-aardvark merged commit 29f4ba5 into master Mar 28, 2017
@not-an-aardvark not-an-aardvark deleted the no-useless-computed-key-identifier-joining branch March 28, 2017 19:49
@eslint-deprecated eslint-deprecated bot locked and limited conversation to collaborators Feb 6, 2018
@eslint-deprecated eslint-deprecated bot added the archived due to age This issue has been archived; please open a new issue for any further discussion label Feb 6, 2018
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6 participants