Parsing error: The keyword 'export' is reserved

[flisboac]

What code were you trying to parse?

I'm trying to use typescript-eslint, and I followed the Getting Started page. Unfortunately, I'm having problems to make the parser identify very basic TypeScript/JS keywords, like export.

Please see https://github.com/flisboac/ts-promise-scheduler for the project in question. The error is:

./ts-promise-scheduler/src/index.ts
  1:1  error  Parsing error: The keyword 'export' is reserved

✖ 1 problem (1 error, 0 warnings)

My .eslint.js is configured as such:

module.exports = {
    root: true,
    parser: '@typescript-eslint/parser',
    plugins: [
        '@typescript-eslint',
    ],
    extends: [
        'eslint:recommended',
        'plugin:@typescript-eslint/eslint-recommended',
        'plugin:@typescript-eslint/recommended',
    ],
    parserOptions: {
        tsconfigRootDir: "./",
        project: "tsconfig.module.json",
    },
};

And here are the first lines of the affected file

export enum JobStatus {
    PENDING,
    RUNNING,
    RESOLVED,
    REJECTED,
    CANCELED,
};

// ...

What did you expect to happen?

To accept export as a keyword, as per named/default export in TypeScript and the ES6+ standards, in the context of exporting declarations.

What actually happened?

export seems to be identified as a reserved name, regardless of context. Parsing fails.

Versions

Disclaimer:I'm using yarn.

package	version
@typescript-eslint/parser	2.16.0
TypeScript	3.7.4
ESLint	6.8.0
node	12.13.0
npm	6.12.0
yarn	1.21.1

Output of yarn versions`:

yarn versions v1.21.1
{
  yarn: '1.21.1',
  'ts-promise-scheduler': '1.0.0',
  node: '12.13.0',
  v8: '7.7.299.13-node.12',
  uv: '1.32.0',
  zlib: '1.2.11',
  brotli: '1.0.7',
  ares: '1.15.0',
  modules: '72',
  nghttp2: '1.39.2',
  napi: '5',
  llhttp: '1.1.4',
  http_parser: '2.8.0',
  openssl: '1.1.1d',
  cldr: '35.1',
  icu: '64.2',
  tz: '2019a',
  unicode: '12.1'
}

Output of yarn list:

yarn list v1.21.1
├─ @babel/code-frame@7.8.3
│  └─ @babel/highlight@^7.8.3
├─ @babel/highlight@7.8.3
│  ├─ chalk@^2.0.0
│  ├─ esutils@^2.0.2
│  └─ js-tokens@^4.0.0
├─ @types/eslint-visitor-keys@1.0.0
├─ @types/json-schema@7.0.4
├─ @typescript-eslint/eslint-plugin@2.16.0
│  ├─ @typescript-eslint/experimental-utils@2.16.0
│  ├─ eslint-utils@^1.4.3
│  ├─ functional-red-black-tree@^1.0.1
│  ├─ regexpp@^3.0.0
│  ├─ regexpp@3.0.0
│  └─ tsutils@^3.17.1
├─ @typescript-eslint/experimental-utils@2.16.0
│  ├─ @types/json-schema@^7.0.3
│  ├─ @typescript-eslint/typescript-estree@2.16.0
│  └─ eslint-scope@^5.0.0
├─ @typescript-eslint/parser@2.16.0
│  ├─ @types/eslint-visitor-keys@^1.0.0
│  ├─ @typescript-eslint/experimental-utils@2.16.0
│  ├─ @typescript-eslint/typescript-estree@2.16.0
│  └─ eslint-visitor-keys@^1.1.0
├─ @typescript-eslint/typescript-estree@2.16.0
│  ├─ debug@^4.1.1
│  ├─ eslint-visitor-keys@^1.1.0
│  ├─ glob@^7.1.6
│  ├─ is-glob@^4.0.1
│  ├─ lodash@^4.17.15
│  ├─ semver@^6.3.0
│  └─ tsutils@^3.17.1
├─ acorn-jsx@5.1.0
├─ acorn@7.1.0
├─ ajv@6.10.2
│  ├─ fast-deep-equal@^2.0.1
│  ├─ fast-json-stable-stringify@^2.0.0
│  ├─ json-schema-traverse@^0.4.1
│  └─ uri-js@^4.2.2
├─ ansi-escapes@4.3.0
│  └─ type-fest@^0.8.1
├─ ansi-regex@4.1.0
├─ ansi-styles@3.2.1
│  └─ color-convert@^1.9.0
├─ argparse@1.0.10
│  └─ sprintf-js@~1.0.2
├─ astral-regex@1.0.0
├─ balanced-match@1.0.0
├─ brace-expansion@1.1.11
│  ├─ balanced-match@^1.0.0
│  └─ concat-map@0.0.1
├─ callsites@3.1.0
├─ chalk@2.4.2
│  ├─ ansi-styles@^3.2.1
│  ├─ escape-string-regexp@^1.0.5
│  └─ supports-color@^5.3.0
├─ chardet@0.7.0
├─ cli-cursor@3.1.0
│  └─ restore-cursor@^3.1.0
├─ cli-width@2.2.0
├─ color-convert@1.9.3
│  └─ color-name@1.1.3
├─ color-name@1.1.3
├─ concat-map@0.0.1
├─ cross-spawn@6.0.5
│  ├─ nice-try@^1.0.4
│  ├─ path-key@^2.0.1
│  ├─ semver@^5.5.0
│  ├─ semver@5.7.1
│  ├─ shebang-command@^1.2.0
│  └─ which@^1.2.9
├─ debug@4.1.1
│  └─ ms@^2.1.1
├─ deep-is@0.1.3
├─ doctrine@3.0.0
│  └─ esutils@^2.0.2
├─ emoji-regex@7.0.3
├─ escape-string-regexp@1.0.5
├─ eslint-scope@5.0.0
│  ├─ esrecurse@^4.1.0
│  └─ estraverse@^4.1.1
├─ eslint-utils@1.4.3
│  └─ eslint-visitor-keys@^1.1.0
├─ eslint-visitor-keys@1.1.0
├─ eslint@6.8.0
│  ├─ @babel/code-frame@^7.0.0
│  ├─ ajv@^6.10.0
│  ├─ chalk@^2.1.0
│  ├─ cross-spawn@^6.0.5
│  ├─ debug@^4.0.1
│  ├─ doctrine@^3.0.0
│  ├─ eslint-scope@^5.0.0
│  ├─ eslint-utils@^1.4.3
│  ├─ eslint-visitor-keys@^1.1.0
│  ├─ espree@^6.1.2
│  ├─ esquery@^1.0.1
│  ├─ esutils@^2.0.2
│  ├─ file-entry-cache@^5.0.1
│  ├─ functional-red-black-tree@^1.0.1
│  ├─ glob-parent@^5.0.0
│  ├─ globals@^12.1.0
│  ├─ ignore@^4.0.6
│  ├─ import-fresh@^3.0.0
│  ├─ imurmurhash@^0.1.4
│  ├─ inquirer@^7.0.0
│  ├─ is-glob@^4.0.0
│  ├─ js-yaml@^3.13.1
│  ├─ json-stable-stringify-without-jsonify@^1.0.1
│  ├─ levn@^0.3.0
│  ├─ lodash@^4.17.14
│  ├─ minimatch@^3.0.4
│  ├─ mkdirp@^0.5.1
│  ├─ natural-compare@^1.4.0
│  ├─ optionator@^0.8.3
│  ├─ progress@^2.0.0
│  ├─ regexpp@^2.0.1
│  ├─ semver@^6.1.2
│  ├─ strip-ansi@^5.2.0
│  ├─ strip-json-comments@^3.0.1
│  ├─ table@^5.2.3
│  ├─ text-table@^0.2.0
│  └─ v8-compile-cache@^2.0.3
├─ espree@6.1.2
│  ├─ acorn-jsx@^5.1.0
│  ├─ acorn@^7.1.0
│  └─ eslint-visitor-keys@^1.1.0
├─ esprima@4.0.1
├─ esquery@1.0.1
│  └─ estraverse@^4.0.0
├─ esrecurse@4.2.1
│  └─ estraverse@^4.1.0
├─ estraverse@4.3.0
├─ esutils@2.0.3
├─ external-editor@3.1.0
│  ├─ chardet@^0.7.0
│  ├─ iconv-lite@^0.4.24
│  └─ tmp@^0.0.33
├─ fast-deep-equal@2.0.1
├─ fast-json-stable-stringify@2.1.0
├─ fast-levenshtein@2.0.6
├─ figures@3.1.0
│  └─ escape-string-regexp@^1.0.5
├─ file-entry-cache@5.0.1
│  └─ flat-cache@^2.0.1
├─ flat-cache@2.0.1
│  ├─ flatted@^2.0.0
│  ├─ rimraf@2.6.3
│  └─ write@1.0.3
├─ flatted@2.0.1
├─ fs.realpath@1.0.0
├─ functional-red-black-tree@1.0.1
├─ glob-parent@5.1.0
│  └─ is-glob@^4.0.1
├─ glob@7.1.6
│  ├─ fs.realpath@^1.0.0
│  ├─ inflight@^1.0.4
│  ├─ inherits@2
│  ├─ minimatch@^3.0.4
│  ├─ once@^1.3.0
│  └─ path-is-absolute@^1.0.0
├─ globals@12.3.0
│  └─ type-fest@^0.8.1
├─ has-flag@3.0.0
├─ iconv-lite@0.4.24
│  └─ safer-buffer@>= 2.1.2 < 3
├─ ignore@4.0.6
├─ import-fresh@3.2.1
│  ├─ parent-module@^1.0.0
│  └─ resolve-from@^4.0.0
├─ imurmurhash@0.1.4
├─ inflight@1.0.6
│  ├─ once@^1.3.0
│  └─ wrappy@1
├─ inherits@2.0.4
├─ inquirer@7.0.3
│  ├─ ansi-escapes@^4.2.1
│  ├─ ansi-regex@5.0.0
│  ├─ chalk@^2.4.2
│  ├─ cli-cursor@^3.1.0
│  ├─ cli-width@^2.0.0
│  ├─ emoji-regex@8.0.0
│  ├─ external-editor@^3.0.3
│  ├─ figures@^3.0.0
│  ├─ is-fullwidth-code-point@3.0.0
│  ├─ lodash@^4.17.15
│  ├─ mute-stream@0.0.8
│  ├─ run-async@^2.2.0
│  ├─ rxjs@^6.5.3
│  ├─ string-width@^4.1.0
│  ├─ string-width@4.2.0
│  │  ├─ emoji-regex@^8.0.0
│  │  ├─ is-fullwidth-code-point@^3.0.0
│  │  ├─ strip-ansi@^6.0.0
│  │  └─ strip-ansi@6.0.0
│  │     └─ ansi-regex@^5.0.0
│  ├─ strip-ansi@^5.1.0
│  └─ through@^2.3.6
├─ is-extglob@2.1.1
├─ is-fullwidth-code-point@2.0.0
├─ is-glob@4.0.1
│  └─ is-extglob@^2.1.1
├─ is-promise@2.1.0
├─ isexe@2.0.0
├─ js-tokens@4.0.0
├─ js-yaml@3.13.1
│  ├─ argparse@^1.0.7
│  └─ esprima@^4.0.0
├─ json-schema-traverse@0.4.1
├─ json-stable-stringify-without-jsonify@1.0.1
├─ levn@0.3.0
│  ├─ prelude-ls@~1.1.2
│  └─ type-check@~0.3.2
├─ lodash@4.17.15
├─ mimic-fn@2.1.0
├─ minimatch@3.0.4
│  └─ brace-expansion@^1.1.7
├─ minimist@0.0.8
├─ mkdirp@0.5.1
│  └─ minimist@0.0.8
├─ ms@2.1.2
├─ mute-stream@0.0.8
├─ natural-compare@1.4.0
├─ nice-try@1.0.5
├─ once@1.4.0
│  └─ wrappy@1
├─ onetime@5.1.0
│  └─ mimic-fn@^2.1.0
├─ optionator@0.8.3
│  ├─ deep-is@~0.1.3
│  ├─ fast-levenshtein@~2.0.6
│  ├─ levn@~0.3.0
│  ├─ prelude-ls@~1.1.2
│  ├─ type-check@~0.3.2
│  └─ word-wrap@~1.2.3
├─ os-tmpdir@1.0.2
├─ parent-module@1.0.1
│  └─ callsites@^3.0.0
├─ path-is-absolute@1.0.1
├─ path-key@2.0.1
├─ prelude-ls@1.1.2
├─ progress@2.0.3
├─ punycode@2.1.1
├─ regexpp@2.0.1
├─ resolve-from@4.0.0
├─ restore-cursor@3.1.0
│  ├─ onetime@^5.1.0
│  └─ signal-exit@^3.0.2
├─ rimraf@2.6.3
│  └─ glob@^7.1.3
├─ run-async@2.3.0
│  └─ is-promise@^2.1.0
├─ rxjs@6.5.4
│  └─ tslib@^1.9.0
├─ safer-buffer@2.1.2
├─ semver@6.3.0
├─ shebang-command@1.2.0
│  └─ shebang-regex@^1.0.0
├─ shebang-regex@1.0.0
├─ signal-exit@3.0.2
├─ slice-ansi@2.1.0
│  ├─ ansi-styles@^3.2.0
│  ├─ astral-regex@^1.0.0
│  └─ is-fullwidth-code-point@^2.0.0
├─ sprintf-js@1.0.3
├─ string-width@3.1.0
│  ├─ emoji-regex@^7.0.1
│  ├─ is-fullwidth-code-point@^2.0.0
│  └─ strip-ansi@^5.1.0
├─ strip-ansi@5.2.0
│  └─ ansi-regex@^4.1.0
├─ strip-json-comments@3.0.1
├─ supports-color@5.5.0
│  └─ has-flag@^3.0.0
├─ table@5.4.6
│  ├─ ajv@^6.10.2
│  ├─ lodash@^4.17.14
│  ├─ slice-ansi@^2.1.0
│  └─ string-width@^3.0.0
├─ text-table@0.2.0
├─ through@2.3.8
├─ tmp@0.0.33
│  └─ os-tmpdir@~1.0.2
├─ tslib@1.10.0
├─ tsutils@3.17.1
│  └─ tslib@^1.8.1
├─ type-check@0.3.2
│  └─ prelude-ls@~1.1.2
├─ type-fest@0.8.1
├─ typescript@3.7.4
├─ uri-js@4.2.2
│  └─ punycode@^2.1.0
├─ v8-compile-cache@2.1.0
├─ which@1.3.1
│  └─ isexe@^2.0.0
├─ word-wrap@1.2.3
├─ wrappy@1.0.2
└─ write@1.0.3
   └─ mkdirp@^0.5.1

[bradzacher]

@armano2 - our parser doesn't actually respect this parserOption - typescript has its own logic for determining this.

could you please run your lint run with the --debug flag?

[armano2]

after reviewing your source code there is issue in name of your eslint config.
it has not standard name .eslint.js (eslint is unable to locate it),
in case when you want to use js file it should be .eslintrc.js or you should provide config as console argument.

eslint . --ext .js,.jsx,.ts,.tsx -c .eslint.js
#or
eslint . --ext .js,.jsx,.ts,.tsx --config .eslint.js

^ @bradzacher you are correct, parser itself does not use this field but its used in rules and scope analysis (i'm keep forgetting about this)

[flisboac]

after reviewing your source code there is issue in name of your eslint config.
it has not standard name .eslint.js (eslint is unable to locate it),
in case when you want to use js file it should be .eslintrc.js or you should provide config as console argument.

eslint . --ext .js,.jsx,.ts,.tsx -c .eslint.js
#or
eslint . --ext .js,.jsx,.ts,.tsx --config .eslint.js

^ @bradzacher you are correct, parser itself does not use this field but its used in rules and scope analysis (i'm keep forgetting about this)

Oh god, such a stupid mistake. I'm sorry!

@armano2 @bradzacher thank you very much!