fix: no-misleading-character-class edge cases with granular errors
#17970
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* main: chore: Split Docs CI from core CI (eslint#17897) fix: Ensure config keys are printed for config errors (eslint#17980) chore: delete relative-module-resolver.js (eslint#17981) docs: migration guide entry for `no-inner-declarations` (eslint#17977) docs: Update README feat: maintain latest ecma version in ESLint (eslint#17958) feat!: no-inner-declaration new default behaviour and option (eslint#17885) feat: add `no-useless-assignment` rule (eslint#17625) fix: `no-misleading-character-class` edge cases with granular errors (eslint#17970) feat: `no-misleading-character-class` granular errors (eslint#17515) docs: fix number of code-path events on custom rules page (eslint#17969) docs: reorder entries in v9 migration guide (eslint#17967) fix!: handle `--output-file` for empty output when saving to disk (eslint#17957)
This was referenced May 29, 2024
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Prerequisites checklist
What is the purpose of this pull request? (put an "X" next to an item)
[ ] Documentation update
[x] Bug fix (template)
[ ] New rule (template)
[ ] Changes an existing rule (template)
[ ] Add autofix to a rule
[ ] Add a CLI option
[ ] Add something to the core
[ ] Other, please explain:
Follow-up for #17515 (comment).
Tell us about your environment (
npx eslint --env-info):mainWhat parser are you using (place an "X" next to just one item)?
[x]
Default (Espree)[ ]
@typescript-eslint/parser[ ]
@babel/eslint-parser[ ]
vue-eslint-parser[ ]
@angular-eslint/template-parser[ ]
OtherPlease show your full configuration:
Configuration
What did you do? Please include the actual source code causing the issue.
What did you expect to happen?
Two errors that underline one ZWJ sequence each.
What actually happened? Please include the actual, raw output from ESLint.
One error that underlines range from the start of the first till the end of the second sequence, including unrelated characters between.
$ node bin/eslint a.js -f json [{"filePath":"C:\\projects\\eslint\\a.js","messages":[{"ruleId":"no-misleading-character-class","severity":2,"message":"Unexpected joined character sequence in character class.","line":3,"column":14,"nodeType":null,"messageId":"zwj","endLine":3,"endColumn":30}],"suppressedMessages":[],"errorCount":1,"fatalErrorCount":0,"warningCount":0,"fixableErrorCount":0,"fixableWarningCount":0,"source":"/* eslint \"no-misleading-character-class\": \"error\" */\n\nvar r = / [��] [��] /u;\n\n\n\n","usedDeprecatedRules":[]}]What changes did you make? (Give an overview)
Refactored the code and fixed the problem with reporting granular errors in patterns with multiple ZWJ sequences.
Before this change:
After this change:
Is there anything you'd like reviewers to focus on?