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v7.3.1 - December 5, 2020
* [`fef6f4a`](https://github.com/eslint/espree/commit/fef6f4a2803d959304c6961527044bd9da39ac92) Upgrade: acorn-jsx@5.3.1 (#459) (Milos Djermanovic)
* [`0e09d9a`](https://github.com/eslint/espree/commit/0e09d9a4f213cb87073a6a87cb7d6317b77d1a23) Chore: Add tests for ecmaVersion default value (#460) (Milos Djermanovic)
* [`4c70052`](https://github.com/eslint/espree/commit/4c70052df0b0ba903602c1f838918cbc07ee5eca) Docs: Fix some minor typos in the READMEs (#455) (Noah Doersing)
v7.3.0 - August 22, 2020
* [`4ba3eef`](https://github.com/eslint/espree/commit/4ba3eefdc4b32784565822b34f11977e99ca1a19) Chore: move to GitHub Actions (#449) (Kai Cataldo)
* [`bd0a405`](https://github.com/eslint/espree/commit/bd0a405ffbe4962bcf5aa225ed3861a6a15cb827) Update: support logical assignment and numeric separators (#448) (Toru Nagashima)
v7.2.0 - July 17, 2020
* [`91c2d58`](https://github.com/eslint/espree/commit/91c2d5896889042058399cd64de4b218c5add0eb) Docs: Add security policy (#447) (Nicholas C. Zakas)
* [`872645c`](https://github.com/eslint/espree/commit/872645cea0bee08960b93c097f84153d44b44d7f) Update: support optional chaining (#446) (Toru Nagashima)
* [`0cc7800`](https://github.com/eslint/espree/commit/0cc78007c933564f32fd849bd8022992845c3ac1) Docs: Clean up LICENSE file (#445) (Nicholas C. Zakas)
v7.1.0 - June 4, 2020
* [`75e80bc`](https://github.com/eslint/espree/commit/75e80bc1b5a100f64b09b2c7bf47c5168417d890) Update: support `??` operator, `import.meta`, and `export * as ns` (#441) (Toru Nagashima)
* [`ad0543c`](https://github.com/eslint/espree/commit/ad0543c8b9f6981857ebebf23a37589a656e61a6) Chore: added fixlint in Makefile.js (#440) (Anix)
v7.0.0 - May 7, 2020
* [`8fe2efc`](https://github.com/eslint/espree/commit/8fe2efc00902e7f1680af00a6279e1aecb3c5b47) Breaking: drop Node v8 support (#429) (Kai Cataldo)
* [`6048bfe`](https://github.com/eslint/espree/commit/6048bfe3939fa7dc162c0b3c4b043bb410736b0b) Docs: documenting public API (fixes #431) (#442) (Anix)
* [`9a4cff3`](https://github.com/eslint/espree/commit/9a4cff3626d50a88428ca1b66610a2bdedd774dd) Chore: added tests for options normalize (#439) (Anix)
* [`99707f3`](https://github.com/eslint/espree/commit/99707f3f9d337ca719dce5720106f98b65bba7b1) Chore: added lockfiles to .gitignore (#438) (Anix)
* [`9b91bcc`](https://github.com/eslint/espree/commit/9b91bccacea15c75025a62bae828f83598aef5fe) Docs: new site for docs (#436) (Anix)
v6.2.1 - March 10, 2020
* [`d6d7480`](https://github.com/eslint/espree/commit/d6d7480e424960159007caea86f209f696138734) Upgrade: acorn 7.1.1, Regex DOS vuln (fixes #435) (#434) (James)
v6.2.0 - March 2, 2020
* [`ced1b68`](https://github.com/eslint/espree/commit/ced1b6810b991531e6d3788ebd5a322fc5c7d463) Update: update acorn-jsx and fix failing test (#432) (Kai Cataldo)
* [`acb8776`](https://github.com/eslint/espree/commit/acb8776d369abf9e02f79142879e9b1a4774f938) Update: add latestEcmaVersion & supportedEcmaVersions (#430) (Kai Cataldo)
v6.1.2 - October 20, 2019
* [`70c4970`](https://github.com/eslint/espree/commit/70c4970e5eba6f060e1e32a22d231647f2d0e0f8) Fix: misuse token types (fixes #393, refs eslint/eslint#11018) (#426) (Toru Nagashima)
v6.1.1 - August 23, 2019
* [`ba81546`](https://github.com/eslint/espree/commit/ba81546e8552ec0f779aae7e03668c334630484e) Upgrade: dev deps to latest (#424) (薛定谔的猫)
* [`bbe0119`](https://github.com/eslint/espree/commit/bbe01195fb57e24634d18825d39b820ed1767e95) Upgrade: acorn-jsx@5.0.2 (#423) (薛定谔的猫)
* [`c0635ba`](https://github.com/eslint/espree/commit/c0635bac4cd891cb612fb81655012e2579f4e2b1) Docs: update readme to mention ES2020 (#422) (Kai Cataldo)
v6.1.0 - August 18, 2019
* [`9870c55`](https://github.com/eslint/espree/commit/9870c553efd3eb1bd22b4b3bb5220896c5cb6933) Update: improve error messaging when validating ecmaVersion (#421) (Kai Cataldo)
* [`3f49224`](https://github.com/eslint/espree/commit/3f49224eb05f6b8cb1b996ce424a99c40978b389) Fix: tokenize the latest right curly brace (fixes #403) (#419) (finico)
* [`f5e58cc`](https://github.com/eslint/espree/commit/f5e58cc5e9030793baca3426366b8d7286ef5b89) Update: support bigint and dynamic import (#415) (Toru Nagashima)
v6.0.0 - June 21, 2019
* [`a988a36`](https://github.com/eslint/espree/commit/a988a36e436a1ab6c84005ba0adb6cf9c262c1ec) Build: add node 12 (#414) (薛定谔的猫)
v6.0.0-alpha.0 - April 12, 2019
* [`493d464`](https://github.com/eslint/espree/commit/493d464e1564aea0ea33000389771d42ddece2cb) Breaking: validate parser options (fixes #384) (#412) (薛定谔的猫)
v5.0.1 - February 15, 2019
* [`c40e2fc`](https://github.com/eslint/espree/commit/c40e2fcedf81ff06151e82bdf655d2d0d29e71b8) Upgrade: acorn@6.0.7 (#407) (Kai Cataldo)
v5.0.0 - December 5, 2018
* [`1bcd563`](https://github.com/eslint/espree/commit/1bcd563d4eb4b4032d2662cc5ccd3bfd841b39d7) Breaking: remove attachComment (#405) (Kai Cataldo)
* [`35623ee`](https://github.com/eslint/espree/commit/35623ee07289c9199eef8b735c97cb3d3d08d5b8) Chore: update linting config (#406) (Kai Cataldo)
* [`4b86a7d`](https://github.com/eslint/espree/commit/4b86a7dc7c447c11bb6530e46dc43428ce2bd372) Build: add node 11 (#400) (薛定谔的猫)
* [`7c278d6`](https://github.com/eslint/espree/commit/7c278d6acc6b5db86b803d0cd21b830deb6f569e) Fix: build failing due to incorrectly super() call (fixes #398) (#399) (薛定谔的猫)
* [`6ebc219`](https://github.com/eslint/espree/commit/6ebc21947166399a0b4918d4a1beb9d610650336) Upgrade: eslint & eslint-config-eslint (#387) (薛定谔的猫)
v4.1.0 - October 24, 2018
* 8eadb88 Upgrade: acorn 6, acorn-jsx 5, and istanbul (#391) (Toru Nagashima)
* 0f2edb8 Upgrade: eslint-release@1.0.0 (#392) (Teddy Katz)
* 560b6f7 Update: VisitorKeys depend on eslint-visitor-keys (#389) (othree)
* 6bf2ebf Docs: Fix some typos in the README (#386) (Hugo Locurcio)
v4.0.0 - June 21, 2018
v4.0.0-rc.0 - June 9, 2018
* d8224c4 Build: Adding rc release script to package.json (#383) (Kevin Partington)
* 4207773 Build: add node 10 (#381) (薛定谔的猫)
* cd9da7e Update: upgrade acorn to support two ES2019 syntax (#380) (Toru Nagashima)
* 8cb3ceb Chore: remove Object.assign polyfill (#382) (薛定谔的猫)
v4.0.0-alpha.1 - May 28, 2018
* 56c5a9c Fix: remove workarounds for acorn < 4 (#372) (Rouven Weßling)
* fd305e5 Upgrade: eslint-release to v0.11.1 (#376) (Teddy Katz)
v4.0.0-alpha.0 - March 30, 2018
* 95fa890 Build: fix typos in package.json release scripts (#375) (Teddy Katz)
* 6284e09 Breaking: remove experimentalObjectRestSpread option (#374) (Teddy Katz)
* 0df063f Breaking: require Node.js 6+, upgrade acorn-jsx@4.1.1 (fixes #345) (#371) (薛定谔的猫)
* 0252144 Upgrade: acorn 5.5.1 (#370) (Rouven Weßling)
v3.5.4 - March 4, 2018
* 706167b Upgrade: acorn 5.5.0 (#369) (Toru Nagashima)
v3.5.3 - February 2, 2018
* 70f9859 Upgrade: acorn 5.4.0 (#367) (Toru Nagashima)
* cea4823 Chore: Adding .gitattributes file (#366) (Kevin Partington)
* 4160aee Upgrade: acorn v5.3.0 (#365) (Toru Nagashima)
v3.5.2 - November 10, 2017
* 019b70a Fix: Remove blockBindings from docs (fixes #307, fixes #339) (#356) (Jan Pilzer)
* b2016cb Chore: refactoring rest/spread properties (#361) (Toru Nagashima)
* 59c9d06 Chore: upgrade acorn@5.2 (fixes #358) (#360) (Toru Nagashima)
* 06c35c9 Chore: add .npmrc (#359) (Toru Nagashima)
v3.5.1 - September 15, 2017
* 5eb1388 Fix: Fix parsing of async keyword-named object methods (#352) (#353) (Mark Banner)
v3.5.0 - August 5, 2017
* 4d442a1 Update: add initial support for ES2018 (#348) (Teddy Katz)
* d4bdcb6 Fix: Make template token objects adhere to token object structure (#343) (Ian Christian Myers)
* 9ac671a Upgrade: acorn to 5.1.1 (#347) (Teddy Katz)
* 16e1fec Docs: Specify default values of options (fixes #325) (#342) (Jan Pilzer)
* be85b8e Fix: async shorthand properties (fixes #340) (#341) (Toru Nagashima)
v3.4.3 - May 5, 2017
* 343590a Fix: add AwaitExpression to espree.Syntax (fixes #331) (#332) (Teddy Katz)
v3.4.2 - April 21, 2017
* c99e436 Upgrade: eslint to 2.13.1 (#328) (Teddy Katz)
* 628cf3a Fix: don't mutate user-provided configs (fixes #329) (#330) (Teddy Katz)
v3.4.1 - March 31, 2017
* a3ae0bd Upgrade: acorn to 5.0.1 (#327) (Teddy Katz)
* 15ef24f Docs: Add badges (#326) (Jan Pilzer)
* 652990a Fix: raise error for trailing commas after rest properties (fixes #310) (#323) (Teddy Katz)
* 9d86ba5 Upgrade: acorn to ^4.0.11 (#317) (Toru Nagashima)
* a3442b5 Chore: fix tests for Node 6+ (#315) (Teddy Katz)
v3.4.0 - February 2, 2017
* f55fa51 Build: Lock acorn to v4.0.4 (#314) (Kai Cataldo)
* 58f75be Fix:generic error for invalid ecmaVersion(fixes eslint#7405) (#303) (Scott Stern)
* d6b383d Docs: Update license copyright (Nicholas C. Zakas)
* e5df542 Update: To support year in ecmaVersion number (fixes #300) (#301) (Gyandeep Singh)
v3.3.2 - September 29, 2016
* 7d3e2fc Fix: reset `isAsync` flag for each property (fixes #298) (#299) (Toru Nagashima)
v3.3.1 - September 26, 2016
* 80abdce Fix: `}` token followed by template had been lost (fixes #293) (#294) (Toru Nagashima)
* 9810bab Fix: parsing error on `async` as property name. (#295) (Toru Nagashima)
v3.3.0 - September 20, 2016
* 92b04b1 Update: create-test script (fixes #291) (#292) (Jamund Ferguson)
v3.2.0 - September 16, 2016
* 5a37f80 Build: Update release tool (Nicholas C. Zakas)
* 9bbcad8 Update: Upgrade Acorn to support ES2017 (fixes #287) (#290) (Jamund Ferguson)
* 8d9767d Build: Add CI release scripts (Nicholas C. Zakas)
v3.1.7 - July 29, 2016
* 8f6cfbd Build: Add CI release (Nicholas C. Zakas)
* ff15922 Fix: Catch ES2016 invalid syntax (fixes #284) (#285) (Nicholas C. Zakas)
v3.1.6 - June 15, 2016
* a90edc2 Upgrade: acorn 3.2.0 (fixes #279) (#280) (Toru Nagashima)
v3.1.5 - May 27, 2016
* 7df2e4a Fix: Convert ~ and ! prefix tokens to esprima (fixes #274) (#276) (Daniel Tschinder)
v3.1.4 - April 21, 2016
* e044705 Fix: remove extra leading comments at node level (fixes #264) (Kai Cataldo)
* 25c27fb Chore: Remove jQuery copyright from header of each file (Kai Cataldo)
* 10709f0 Chore: Add jQuery Foundation copyright (Nicholas C. Zakas)
* d754b32 Upgrade: Acorn 3.1.0 (fixes #270) (Toru Nagashima)
* 3a90886 Docs: replace a dead link with the correct contributing guide URL (Shinnosuke Watanabe)
* 55184a2 Build: replace optimist with a simple native method (Shinnosuke Watanabe)
* c7e5a13 Fix: Disallow namespaces objects in JSX (fixes #261) (Kai Cataldo)
* 22290b9 Fix: Add test for leading comments (fixes #136) (Kai Cataldo)
v3.1.3 - March 18, 2016
* 98441cb Fix: Fix behavior of ignoring comments within previous nodes (refs #256) (Kai Cataldo)
v3.1.2 - March 14, 2016
* a2b23ca Fix: Ensure 'var let' works (fixes #149) (Nicholas C. Zakas)
* 5783282 Fix: Make obj.await work in modules (fixes #258) (Nicholas C. Zakas)
* d1b4929 Fix: leading comments added from previous node (fixes #256) (Kai Cataldo)
v3.1.1 - February 26, 2016
* 3614e81 Fix: exponentiation operator token (fixes #254) (Nicholas C. Zakas)
v3.1.0 - February 25, 2016
* da35d98 New: Support ecmaVersion 7 (fixes #246) (Nicholas C. Zakas)
v3.0.2 - February 19, 2016
* 0973cda Build: Update release script (Nicholas C. Zakas)
* 106000f Fix: use the plugins feature of acorn (fixes #250) (Toru Nagashima)
* 36d84c7 Build: Add tests (fixes #243) (Nicholas C. Zakas)
v3.0.1 - February 2, 2016
* ecfe4c8 Upgrade: eslint-config-eslint to 3.0.0 (Nicholas C. Zakas)
* ea6261e Fix: Object rest/spread in assign (fixes #247) (Nicholas C. Zakas)
* 7e57ee0 Docs: fix `options.comment` typo (xuezu)
* dd5863e Build: Add prerelease script (Nicholas C. Zakas)
* 0b409ee Upgrade: eslint-release to 0.2.0 (Nicholas C. Zakas)
v3.0.0 - January 20, 2016
* 5ff65f6 Upgrade: Change Esprima version to latest (Nicholas C. Zakas)
* a8badcc Upgrade: eslint-release to 0.1.4 (Nicholas C. Zakas)
* 34d195b Build: Switch to eslint-release (Nicholas C. Zakas)
* a0ddc30 Breaking: Remove binary scripts (Nicholas C. Zakas)
* 02b5284 Build: Fix package.json dependencies (Nicholas C. Zakas)
* b07696f Fix: tests for importing keywords (fixes #225) (Toru Nagashima)
* 2e2808a Build: Add node@5 to CI (fixes #237) (alberto)
* 445c685 Update: Unrecognized license format in package.json (fixes #234) (alberto)
* 61cb5ee Update: Remove duplicated acorn-jsx dep (fixes #232) (alberto)
* df5b71c Upgrade: eslint and eslint-config-eslint (fixes #231) (alberto)
* ef7a06d Fix: lastToken not reset between calls to parse (fixes #229) (alberto)
* cdf8407 New: ecmaFeatures.impliedStrict (fixes: #227) (Nick Evans)
v3.0.0-alpha-2 - December 9, 2015
* 3.0.0-alpha-2 (Nicholas C. Zakas)
* Breaking: move ecmaFeatures into ecmaVersion (fixes #222) (Nicholas C. Zakas)
* New: Export VisitorKeys (fixes #220) (Nicholas C. Zakas)
v3.0.0-alpha-1 - December 1, 2015
* 3.0.0-alpha-1 (Nicholas C. Zakas)
* Fix: parse unicode escapes in identifiers (fixes #181) (Nicholas C. Zakas)
* Fix: Ensur object rest works in destructed arg (fixes #213) (Nicholas C. Zakas)
* Breaking: Switch to Acorn (fixes #200) (Nicholas C. Zakas)
* Update: Add tokens to tests (fixes #203) (Nicholas C. Zakas)
* Docs: Update README (Nicholas C. Zakas)
v2.2.5 - September 15, 2015
* 2.2.5 (Nicholas C. Zakas)
* Fix: Ensure node type is correct for destructured (fixes #195) (Nicholas C. Zakas)
v2.2.4 - August 13, 2015
* 2.2.4 (Nicholas C. Zakas)
* Fix: newlines in arrow functions (fixes #172) (Jamund Ferguson)
* Fix: nested arrow function as default param (fixes #145) (Jamund Ferguson)
* Fix: Rest Params & Arrow Functions (fixes #187) (Jamund Ferguson)
* Fix: trailing commas in import/export (fixes #148) (Jamund Ferguson)
* Build: Added sudo false to Travis to build faster (fixes #177) (KahWee Teng)
v2.2.3 - July 22, 2015
* 2.2.3 (Nicholas C. Zakas)
* Fix: Incorrect error location (fixes #173) (Nicholas C. Zakas)
v2.2.2 - July 16, 2015
* 2.2.2 (Nicholas C. Zakas)
* 2.2.1 (Nicholas C. Zakas)
* Fix: Yield as identifier in arrow func args (fixes #165) (Nicholas C. Zakas)
* Fix: Allow AssignmentExpression in object spread (fixes #167) (Nicholas C. Zakas)
v2.2.1 - July 16, 2015
* 2.2.1 (Nicholas C. Zakas)
v2.2.0 - July 15, 2015
* 2.2.0 (Nicholas C. Zakas)
* New: Add experimental object rest/spread (fixes #163) (Nicholas C. Zakas)
* Fix: npm browserify (fixes #156) (Jason Laster)
v2.1.0 - July 10, 2015
* 2.1.0 (Nicholas C. Zakas)
* Fix: Leading comments for anonymous classes (fixes #155, fixes #158) (Toru Nagashima)
* New: Add newTarget option (fixes #157) (Nicholas C. Zakas)
v2.0.4 - June 26, 2015
* 2.0.4 (Nicholas C. Zakas)
* Docs: added missing `ecmaFeatures.superInFunctions` option from doc (Clément Fiorio)
* Fix: "await" is a future reserved word (fixes #151) (Jose Roberto Vidal)
v2.0.3 - June 2, 2015
* 2.0.3 (Nicholas C. Zakas)
* Fix: Incomplete Switch Statement Hangs (Fixes #146) (Jamund Ferguson)
* Docs: Clarify ecmaFeatures usage (Dan Wolff)
v2.0.2 - April 28, 2015
* 2.0.2 (Nicholas C. Zakas)
* Fix: Allow yield without value as function param (fixes #134) (Nicholas C. Zakas)
* Fix: Allow computed generators in classes (fixes #123) (Nicholas C. Zakas)
* Fix: Don't allow arrow function rest param (fixes #130) (Nicholas C. Zakas)
v2.0.1 - April 11, 2015
* 2.0.1 (Nicholas C. Zakas)
* Fix: Yield should parse without an argument (fixes #121) (Nicholas C. Zakas)
v2.0.0 - April 4, 2015
* 2.0.0 (Nicholas C. Zakas)
* Docs: Update README with latest info (Nicholas C. Zakas)
* Breaking: Use ESTree format for default params (fixes #114) (Nicholas C. Zakas)
* New: Add Super node (fixes #115) (Nicholas C. Zakas)
* Breaking: Switch to RestElement for rest args (fixes #84) (Nicholas C. Zakas)
* Docs: Correct license info on README (fixes #117) (AJ Ortega)
* Breaking: Remove guardedHandlers/handlers from try (fixes #71) (Nicholas C. Zakas)
v1.12.3 - March 28, 2015
* 1.12.3 (Nicholas C. Zakas)
* Fix: Tagged template strings (fixes #110) (Nicholas C. Zakas)
v1.12.2 - March 21, 2015
* 1.12.2 (Nicholas C. Zakas)
* Fix: Destructured arg for catch (fixes #105) (Nicholas C. Zakas)
v1.12.1 - March 21, 2015
* 1.12.1 (Nicholas C. Zakas)
* Fix: Disallow octals in template strings (fixes #96) (Nicholas C. Zakas)
* Fix: Template string parsing (fixes #95) (Nicholas C. Zakas)
* Fix: shorthand properties named get or set (fixes #100) (Brandon Mills)
* Fix: bad error in parsing invalid class setter (fixes #98) (Marsup)
v1.12.0 - March 14, 2015
* 1.12.0 (Nicholas C. Zakas)
* Fix: Update broken tests (Nicholas C. Zakas)
* New: Add sourceType to Program node (fixes #93) (Nicholas C. Zakas)
* Allow spread in more places (fixes #89) (Nicholas C. Zakas)
* Fix: Deeply nested template literals (fixes #86) (Nicholas C. Zakas)
* Fix: Allow super in classes by default (fixes #87) (Nicholas C. Zakas)
* Fix: generator methods in classes (fixes #85) (Jamund Ferguson)
* Remove XJS note from Esprima-FB incompatibilities (Joe Lencioni)
v1.11.0 - March 7, 2015
* 1.11.0 (Nicholas C. Zakas)
* Fix: Don't allow default export class by mistake (fixes #82) (Nicholas C. Zakas)
* Fix: Export default function should be FunctionDeclaration (fixes #81) (Nicholas C. Zakas)
* Fix: Ensure class declarations must have IDs outside of exports (refs #72) (Nicholas C. Zakas)
* Fix: export class expression support (refs #72) (Jamund Ferguson)
* Update: Add tests for sourceType=module (refs #72) (Nicholas C. Zakas)
* Fix: Class name should be id (fixes #78) (Nicholas C. Zakas)
* Fix: disallow import/export in functions (refs #72) (Jamund Ferguson)
* Test: strict mode enforced in modules (refs #72) (Jamund Ferguson)
* New: Add modules feature flag (refs #72) (Nicholas C. Zakas)
* merging upstream and solving conflicts for PR #43 (Caridy Patino)
* New: Add ES6 module support (fixes #35) (Caridy Patino)
* Update: Add TryStatement.handler (fixes #69) (Brandon Mills)
* Fix: Destructured Defaults (fixes #56) (Jamund Ferguson)
* Update: Refactor out comment attachment logic (Nicholas C. Zakas)
v1.10.0 - March 1, 2015
* 1.10.0 (Nicholas C. Zakas)
* New: Support ES6 classes (refs #10) (Nicholas C. Zakas)
* Docs: Update README.md (Jamund Ferguson)
v1.9.1 - February 21, 2015
* 1.9.1 (Nicholas C. Zakas)
* Fix: Allow let/const in switchcase (fixes #54) (Nicholas C. Zakas)
v1.9.0 - February 21, 2015
* 1.9.0 (Nicholas C. Zakas)
* Fix: Extend property method range and loc to include params (fixes #36) (Brandon Mills)
* New: spread operator (refs #10) (Jamund Ferguson)
* Fix: incorrectly parsed arrow fragment (refs #58) (Jamund Ferguson)
* New: Rest Parameter (refs: #10) (Jamund Ferguson)
* New: Destructuring (refs #10) (Jamund Ferguson)
v1.8.1 - February 7, 2015
* 1.8.1 (Nicholas C. Zakas)
* Build: Add Node.js 0.12 testing (Nicholas C. Zakas)
* Fix: Actuall fix tokenization issue with templates (fixes #44) (Nicholas C. Zakas)
v1.8.0 - February 6, 2015
* 1.8.0 (Nicholas C. Zakas)
* New: Support for Arrow Functions (refs #10) (Jamund Ferguson)
* New: Allow super references in functions (refs #10) (Nicholas C. Zakas)
* Update create-test.js (Jamund Ferguson)
* Fix: Tokenization for template strings (fixes #44) (Nicholas C. Zakas)
* New: Allow return in global scope (fixes #46) (Nicholas C. Zakas)
v1.7.1 - January 23, 2015
* 1.7.1 (Nicholas C. Zakas)
* Fix: When ecmaFeatures.forOf is true, check for operater is "undefined" when match keyword is "in" (fixes #39) (Peter Chanthamynavong)
v1.7.0 - January 23, 2015
* 1.7.0 (Nicholas C. Zakas)
* New: Add support for template strings (FredKSchott)
* New: Add support for default parameters (refs #10) (Jamund Ferguson)
* New: Add support for unicode code point escape sequences (FredKSchott)
v1.6.0 - January 10, 2015
* 1.6.0 (Nicholas C. Zakas)
* Update: Make comment attachment tests look at whole AST (Nicholas C. Zakas)
* Docs: Update README to reflect feature flags (Nicholas C. Zakas)
* Docs: Add a couple more FAQs to README (Nicholas C. Zakas)
* New: Add support for duplicate object literal properties (FredKSchott)
* New: Implement generators (refs #10) (Nicholas C. Zakas)
v1.5.0 - December 29, 2014
* 1.5.0 (Nicholas C. Zakas)
* Docs: Update README with compat info (Nicholas C. Zakas)
* Update: Add regex parsing test (Nicholas C. Zakas)
* Update: s/XJS/JSX/g (Nicholas C. Zakas)
* Build: Update release script (Nicholas C. Zakas)
* Update: Move SyntaxTree to ast-node-factory.js (FredKSchott)
* New: Add JSX parsing (fixes #26) (Nicholas C. Zakas)
* Update: Switch location marker logic (fixes #15) (Nicholas C. Zakas)
* 1.4.0 (Nicholas C. Zakas)
v1.4.0 - December 23, 2014
* 1.4.0 (Nicholas C. Zakas)
* Fix: Parsing issues with property methods (fixes #21) (Nicholas C. Zakas)
* New: Add support for shorthand properties (refs #10) (Nicholas C. Zakas)
* New: Add support for object literal method shorthand (refs #10) (Nicholas C. Zakas)
* Fix: Ensure comments are attached for return (fixes #2) (Nicholas C. Zakas)
* Build: Ensure CHANGELOG.md is committed on release (Nicholas C. Zakas)
* 1.3.1 (Nicholas C. Zakas)
v1.3.1 - December 22, 2014
* 1.3.1 (Nicholas C. Zakas)
* Fix: Add all files to npm package (fixes #17) (Nicholas C. Zakas)
* Update: Move Messages to separate file (Nicholas C. Zakas)
* Docs: Removed unnecessary comment (Nicholas C. Zakas)
* 1.3.0 (Nicholas C. Zakas)
v1.3.0 - December 21, 2014
* 1.3.0 (Nicholas C. Zakas)
* Build: Add release scripts (Nicholas C. Zakas)
* New: Add computed object literal properties (refs #10) (Nicholas C. Zakas)
* Build: Fix commands in Makefile.js (Nicholas C. Zakas)
* Docs: Add FAQ to README (Nicholas C. Zakas)
* Fix: Don't allow let/const in for loops (fixes #14) (Nicholas C. Zakas)
* New: Support for-of loops (refs #10) (Nicholas C. Zakas)
* Update: Change .ast.js files to .result.js files (Nicholas C. Zakas)
* New: Support ES6 octal literals (Nicholas C. Zakas)
* New: Ability to parse binary literals (Nicholas C. Zakas)
* Update: More tests for regex u flag (Nicholas C. Zakas)
* Update: Switch to using ecmaFeatures (Nicholas C. Zakas)
* Update: Add comment attachment tests (Nicholas C. Zakas)
* Update README.md (Jamund Ferguson)
* New: Add u and y regex flags (refs #10) (Nicholas C. Zakas)
* Update: Cleanup tests (Nicholas C. Zakas)
* New: Add ecmascript flag (fixes #7) (Nicholas C. Zakas)
* Docs: Update README with build commands (Nicholas C. Zakas)
* Update: Move some things around (Nicholas C. Zakas)
* Update: Read version number from package.json (Nicholas C. Zakas)
* Update: Move AST node types to separate file (Nicholas C. Zakas)
* Update: Remove duplicate file (Nicholas C. Zakas)
* Update: Move token information to a separate file (Nicholas C. Zakas)
* Update: Bring in Makefile.js for linting and browserify (Nicholas C. Zakas)
* Update: Fix ESLint warnings, remove check-version (Nicholas C. Zakas)
* Update: Move Position and SourceLocation to separate file (Nicholas C. Zakas)
* Update: Move syntax checks into separate file (Nicholas C. Zakas)
* Update: Remove UMD format (Nicholas C. Zakas)
* Docs: Update README with more info (Nicholas C. Zakas)
* Update: remove npm-debug.log from tracked files (Brandon Mills)
* Docs: Remove redundant 'features' in readme (Matthias Oßwald)
* Docs: Fix a link to Wikipedia (Ryuichi Okumura)
* Update: Split parsing tests into smaller files (Nicholas C. Zakas)
* Update: Normalize values in tests (Nicholas C. Zakas)
* Update: CommonJSify test file (Nicholas C. Zakas)

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BSD 2-Clause License
Copyright (c) Open JS Foundation
All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:
1. Redistributions of source code must retain the above copyright notice, this
list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright notice,
this list of conditions and the following disclaimer in the documentation
and/or other materials provided with the distribution.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

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[![npm version](https://img.shields.io/npm/v/espree.svg)](https://www.npmjs.com/package/espree)
[![Build Status](https://travis-ci.org/eslint/espree.svg?branch=master)](https://travis-ci.org/eslint/espree)
[![npm downloads](https://img.shields.io/npm/dm/espree.svg)](https://www.npmjs.com/package/espree)
[![Bountysource](https://www.bountysource.com/badge/tracker?tracker_id=9348450)](https://www.bountysource.com/trackers/9348450-eslint?utm_source=9348450&utm_medium=shield&utm_campaign=TRACKER_BADGE)
# Espree
Espree started out as a fork of [Esprima](http://esprima.org) v1.2.2, the last stable published released of Esprima before work on ECMAScript 6 began. Espree is now built on top of [Acorn](https://github.com/ternjs/acorn), which has a modular architecture that allows extension of core functionality. The goal of Espree is to produce output that is similar to Esprima with a similar API so that it can be used in place of Esprima.
## Usage
Install:
```
npm i espree
```
And in your Node.js code:
```javascript
const espree = require("espree");
const ast = espree.parse(code);
```
## API
### `parse()`
`parse` parses the given code and returns a abstract syntax tree (AST). It takes two parameters.
- `code` [string]() - the code which needs to be parsed.
- `options (Optional)` [Object]() - read more about this [here](#options).
```javascript
const espree = require("espree");
const ast = espree.parse(code, options);
```
**Example :**
```js
const ast = espree.parse('let foo = "bar"', { ecmaVersion: 6 });
console.log(ast);
```
<details><summary>Output</summary>
<p>
```
Node {
type: 'Program',
start: 0,
end: 15,
body: [
Node {
type: 'VariableDeclaration',
start: 0,
end: 15,
declarations: [Array],
kind: 'let'
}
],
sourceType: 'script'
}
```
</p>
</details>
### `tokenize()`
`tokenize` returns the tokens of a given code. It takes two parameters.
- `code` [string]() - the code which needs to be parsed.
- `options (Optional)` [Object]() - read more about this [here](#options).
Even if `options` is empty or undefined or `options.tokens` is `false`, it assigns it to `true` in order to get the `tokens` array
**Example :**
```js
const tokens = espree.tokenize('let foo = "bar"', { ecmaVersion: 6 });
console.log(tokens);
```
<details><summary>Output</summary>
<p>
```
Token { type: 'Keyword', value: 'let', start: 0, end: 3 },
Token { type: 'Identifier', value: 'foo', start: 4, end: 7 },
Token { type: 'Punctuator', value: '=', start: 8, end: 9 },
Token { type: 'String', value: '"bar"', start: 10, end: 15 }
```
</p>
</details>
### `version`
Returns the current `espree` version
### `VisitorKeys`
Returns all visitor keys for traversing the AST from [eslint-visitor-keys](https://github.com/eslint/eslint-visitor-keys)
### `latestEcmaVersion`
Returns the latest ECMAScript supported by `espree`
### `supportedEcmaVersions`
Returns an array of all supported ECMAScript versions
## Options
```js
const options = {
// attach range information to each node
range: false,
// attach line/column location information to each node
loc: false,
// create a top-level comments array containing all comments
comment: false,
// create a top-level tokens array containing all tokens
tokens: false,
// Set to 3, 5 (default), 6, 7, 8, 9, 10, 11, or 12 to specify the version of ECMAScript syntax you want to use.
// You can also set to 2015 (same as 6), 2016 (same as 7), 2017 (same as 8), 2018 (same as 9), 2019 (same as 10), 2020 (same as 11), or 2021 (same as 12) to use the year-based naming.
ecmaVersion: 5,
// specify which type of script you're parsing ("script" or "module")
sourceType: "script",
// specify additional language features
ecmaFeatures: {
// enable JSX parsing
jsx: false,
// enable return in global scope
globalReturn: false,
// enable implied strict mode (if ecmaVersion >= 5)
impliedStrict: false
}
}
```
## Esprima Compatibility Going Forward
The primary goal is to produce the exact same AST structure and tokens as Esprima, and that takes precedence over anything else. (The AST structure being the [ESTree](https://github.com/estree/estree) API with JSX extensions.) Separate from that, Espree may deviate from what Esprima outputs in terms of where and how comments are attached, as well as what additional information is available on AST nodes. That is to say, Espree may add more things to the AST nodes than Esprima does but the overall AST structure produced will be the same.
Espree may also deviate from Esprima in the interface it exposes.
## Contributing
Issues and pull requests will be triaged and responded to as quickly as possible. We operate under the [ESLint Contributor Guidelines](http://eslint.org/docs/developer-guide/contributing), so please be sure to read them before contributing. If you're not sure where to dig in, check out the [issues](https://github.com/eslint/espree/issues).
Espree is licensed under a permissive BSD 2-clause license.
## Security Policy
We work hard to ensure that Espree is safe for everyone and that security issues are addressed quickly and responsibly. Read the full [security policy](https://github.com/eslint/.github/blob/master/SECURITY.md).
## Build Commands
* `npm test` - run all linting and tests
* `npm run lint` - run all linting
* `npm run browserify` - creates a version of Espree that is usable in a browser
## Differences from Espree 2.x
* The `tokenize()` method does not use `ecmaFeatures`. Any string will be tokenized completely based on ECMAScript 6 semantics.
* Trailing whitespace no longer is counted as part of a node.
* `let` and `const` declarations are no longer parsed by default. You must opt-in by using an `ecmaVersion` newer than `5` or setting `sourceType` to `module`.
* The `esparse` and `esvalidate` binary scripts have been removed.
* There is no `tolerant` option. We will investigate adding this back in the future.
## Known Incompatibilities
In an effort to help those wanting to transition from other parsers to Espree, the following is a list of noteworthy incompatibilities with other parsers. These are known differences that we do not intend to change.
### Esprima 1.2.2
* Esprima counts trailing whitespace as part of each AST node while Espree does not. In Espree, the end of a node is where the last token occurs.
* Espree does not parse `let` and `const` declarations by default.
* Error messages returned for parsing errors are different.
* There are two addition properties on every node and token: `start` and `end`. These represent the same data as `range` and are used internally by Acorn.
### Esprima 2.x
* Esprima 2.x uses a different comment attachment algorithm that results in some comments being added in different places than Espree. The algorithm Espree uses is the same one used in Esprima 1.2.2.
## Frequently Asked Questions
### Why another parser
[ESLint](http://eslint.org) had been relying on Esprima as its parser from the beginning. While that was fine when the JavaScript language was evolving slowly, the pace of development increased dramatically and Esprima had fallen behind. ESLint, like many other tools reliant on Esprima, has been stuck in using new JavaScript language features until Esprima updates, and that caused our users frustration.
We decided the only way for us to move forward was to create our own parser, bringing us inline with JSHint and JSLint, and allowing us to keep implementing new features as we need them. We chose to fork Esprima instead of starting from scratch in order to move as quickly as possible with a compatible API.
With Espree 2.0.0, we are no longer a fork of Esprima but rather a translation layer between Acorn and Esprima syntax. This allows us to put work back into a community-supported parser (Acorn) that is continuing to grow and evolve while maintaining an Esprima-compatible parser for those utilities still built on Esprima.
### Have you tried working with Esprima?
Yes. Since the start of ESLint, we've regularly filed bugs and feature requests with Esprima and will continue to do so. However, there are some different philosophies around how the projects work that need to be worked through. The initial goal was to have Espree track Esprima and eventually merge the two back together, but we ultimately decided that building on top of Acorn was a better choice due to Acorn's plugin support.
### Why don't you just use Acorn?
Acorn is a great JavaScript parser that produces an AST that is compatible with Esprima. Unfortunately, ESLint relies on more than just the AST to do its job. It relies on Esprima's tokens and comment attachment features to get a complete picture of the source code. We investigated switching to Acorn, but the inconsistencies between Esprima and Acorn created too much work for a project like ESLint.
We are building on top of Acorn, however, so that we can contribute back and help make Acorn even better.
### What ECMAScript features do you support?
Espree supports all ECMAScript 2020 features and partially supports ECMAScript 2021 features.
Because ECMAScript 2021 is still under development, we are implementing features as they are finalized. Currently, Espree supports:
* [Logical Assignment Operators](https://github.com/tc39/proposal-logical-assignment)
* [Numeric Separators](https://github.com/tc39/proposal-numeric-separator)
See [finished-proposals.md](https://github.com/tc39/proposals/blob/master/finished-proposals.md) to know what features are finalized.
### How do you determine which experimental features to support?
In general, we do not support experimental JavaScript features. We may make exceptions from time to time depending on the maturity of the features.

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/**
* @fileoverview Main Espree file that converts Acorn into Esprima output.
*
* This file contains code from the following MIT-licensed projects:
* 1. Acorn
* 2. Babylon
* 3. Babel-ESLint
*
* This file also contains code from Esprima, which is BSD licensed.
*
* Acorn is Copyright 2012-2015 Acorn Contributors (https://github.com/marijnh/acorn/blob/master/AUTHORS)
* Babylon is Copyright 2014-2015 various contributors (https://github.com/babel/babel/blob/master/packages/babylon/AUTHORS)
* Babel-ESLint is Copyright 2014-2015 Sebastian McKenzie <sebmck@gmail.com>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL <COPYRIGHT HOLDER> BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* Esprima is Copyright (c) jQuery Foundation, Inc. and Contributors, All Rights Reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL <COPYRIGHT HOLDER> BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/* eslint no-undefined:0, no-use-before-define: 0 */
"use strict";
const acorn = require("acorn");
const jsx = require("acorn-jsx");
const astNodeTypes = require("./lib/ast-node-types");
const espree = require("./lib/espree");
const { getLatestEcmaVersion, getSupportedEcmaVersions } = require("./lib/options");
// To initialize lazily.
const parsers = {
_regular: null,
_jsx: null,
get regular() {
if (this._regular === null) {
this._regular = acorn.Parser.extend(espree());
}
return this._regular;
},
get jsx() {
if (this._jsx === null) {
this._jsx = acorn.Parser.extend(jsx(), espree());
}
return this._jsx;
},
get(options) {
const useJsx = Boolean(
options &&
options.ecmaFeatures &&
options.ecmaFeatures.jsx
);
return useJsx ? this.jsx : this.regular;
}
};
//------------------------------------------------------------------------------
// Tokenizer
//------------------------------------------------------------------------------
/**
* Tokenizes the given code.
* @param {string} code The code to tokenize.
* @param {Object} options Options defining how to tokenize.
* @returns {Token[]} An array of tokens.
* @throws {SyntaxError} If the input code is invalid.
* @private
*/
function tokenize(code, options) {
const Parser = parsers.get(options);
// Ensure to collect tokens.
if (!options || options.tokens !== true) {
options = Object.assign({}, options, { tokens: true }); // eslint-disable-line no-param-reassign
}
return new Parser(options, code).tokenize();
}
//------------------------------------------------------------------------------
// Parser
//------------------------------------------------------------------------------
/**
* Parses the given code.
* @param {string} code The code to tokenize.
* @param {Object} options Options defining how to tokenize.
* @returns {ASTNode} The "Program" AST node.
* @throws {SyntaxError} If the input code is invalid.
*/
function parse(code, options) {
const Parser = parsers.get(options);
return new Parser(options, code).parse();
}
//------------------------------------------------------------------------------
// Public
//------------------------------------------------------------------------------
exports.version = require("./package.json").version;
exports.tokenize = tokenize;
exports.parse = parse;
// Deep copy.
/* istanbul ignore next */
exports.Syntax = (function() {
let name,
types = {};
if (typeof Object.create === "function") {
types = Object.create(null);
}
for (name in astNodeTypes) {
if (Object.hasOwnProperty.call(astNodeTypes, name)) {
types[name] = astNodeTypes[name];
}
}
if (typeof Object.freeze === "function") {
Object.freeze(types);
}
return types;
}());
/* istanbul ignore next */
exports.VisitorKeys = (function() {
return require("eslint-visitor-keys").KEYS;
}());
exports.latestEcmaVersion = getLatestEcmaVersion();
exports.supportedEcmaVersions = getSupportedEcmaVersions();

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/**
* @fileoverview The AST node types produced by the parser.
* @author Nicholas C. Zakas
*/
"use strict";
//------------------------------------------------------------------------------
// Requirements
//------------------------------------------------------------------------------
// None!
//------------------------------------------------------------------------------
// Public
//------------------------------------------------------------------------------
module.exports = {
AssignmentExpression: "AssignmentExpression",
AssignmentPattern: "AssignmentPattern",
ArrayExpression: "ArrayExpression",
ArrayPattern: "ArrayPattern",
ArrowFunctionExpression: "ArrowFunctionExpression",
AwaitExpression: "AwaitExpression",
BlockStatement: "BlockStatement",
BinaryExpression: "BinaryExpression",
BreakStatement: "BreakStatement",
CallExpression: "CallExpression",
CatchClause: "CatchClause",
ClassBody: "ClassBody",
ClassDeclaration: "ClassDeclaration",
ClassExpression: "ClassExpression",
ConditionalExpression: "ConditionalExpression",
ContinueStatement: "ContinueStatement",
DoWhileStatement: "DoWhileStatement",
DebuggerStatement: "DebuggerStatement",
EmptyStatement: "EmptyStatement",
ExpressionStatement: "ExpressionStatement",
ForStatement: "ForStatement",
ForInStatement: "ForInStatement",
ForOfStatement: "ForOfStatement",
FunctionDeclaration: "FunctionDeclaration",
FunctionExpression: "FunctionExpression",
Identifier: "Identifier",
IfStatement: "IfStatement",
Literal: "Literal",
LabeledStatement: "LabeledStatement",
LogicalExpression: "LogicalExpression",
MemberExpression: "MemberExpression",
MetaProperty: "MetaProperty",
MethodDefinition: "MethodDefinition",
NewExpression: "NewExpression",
ObjectExpression: "ObjectExpression",
ObjectPattern: "ObjectPattern",
Program: "Program",
Property: "Property",
RestElement: "RestElement",
ReturnStatement: "ReturnStatement",
SequenceExpression: "SequenceExpression",
SpreadElement: "SpreadElement",
Super: "Super",
SwitchCase: "SwitchCase",
SwitchStatement: "SwitchStatement",
TaggedTemplateExpression: "TaggedTemplateExpression",
TemplateElement: "TemplateElement",
TemplateLiteral: "TemplateLiteral",
ThisExpression: "ThisExpression",
ThrowStatement: "ThrowStatement",
TryStatement: "TryStatement",
UnaryExpression: "UnaryExpression",
UpdateExpression: "UpdateExpression",
VariableDeclaration: "VariableDeclaration",
VariableDeclarator: "VariableDeclarator",
WhileStatement: "WhileStatement",
WithStatement: "WithStatement",
YieldExpression: "YieldExpression",
JSXIdentifier: "JSXIdentifier",
JSXNamespacedName: "JSXNamespacedName",
JSXMemberExpression: "JSXMemberExpression",
JSXEmptyExpression: "JSXEmptyExpression",
JSXExpressionContainer: "JSXExpressionContainer",
JSXElement: "JSXElement",
JSXClosingElement: "JSXClosingElement",
JSXOpeningElement: "JSXOpeningElement",
JSXAttribute: "JSXAttribute",
JSXSpreadAttribute: "JSXSpreadAttribute",
JSXText: "JSXText",
ExportDefaultDeclaration: "ExportDefaultDeclaration",
ExportNamedDeclaration: "ExportNamedDeclaration",
ExportAllDeclaration: "ExportAllDeclaration",
ExportSpecifier: "ExportSpecifier",
ImportDeclaration: "ImportDeclaration",
ImportSpecifier: "ImportSpecifier",
ImportDefaultSpecifier: "ImportDefaultSpecifier",
ImportNamespaceSpecifier: "ImportNamespaceSpecifier"
};

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"use strict";
/* eslint-disable no-param-reassign*/
const TokenTranslator = require("./token-translator");
const { normalizeOptions } = require("./options");
const STATE = Symbol("espree's internal state");
const ESPRIMA_FINISH_NODE = Symbol("espree's esprimaFinishNode");
/**
* Converts an Acorn comment to a Esprima comment.
* @param {boolean} block True if it's a block comment, false if not.
* @param {string} text The text of the comment.
* @param {int} start The index at which the comment starts.
* @param {int} end The index at which the comment ends.
* @param {Location} startLoc The location at which the comment starts.
* @param {Location} endLoc The location at which the comment ends.
* @returns {Object} The comment object.
* @private
*/
function convertAcornCommentToEsprimaComment(block, text, start, end, startLoc, endLoc) {
const comment = {
type: block ? "Block" : "Line",
value: text
};
if (typeof start === "number") {
comment.start = start;
comment.end = end;
comment.range = [start, end];
}
if (typeof startLoc === "object") {
comment.loc = {
start: startLoc,
end: endLoc
};
}
return comment;
}
module.exports = () => Parser => {
const tokTypes = Object.assign({}, Parser.acorn.tokTypes);
if (Parser.acornJsx) {
Object.assign(tokTypes, Parser.acornJsx.tokTypes);
}
return class Espree extends Parser {
constructor(opts, code) {
if (typeof opts !== "object" || opts === null) {
opts = {};
}
if (typeof code !== "string" && !(code instanceof String)) {
code = String(code);
}
const options = normalizeOptions(opts);
const ecmaFeatures = options.ecmaFeatures || {};
const tokenTranslator =
options.tokens === true
? new TokenTranslator(tokTypes, code)
: null;
// Initialize acorn parser.
super({
// TODO: use {...options} when spread is supported(Node.js >= 8.3.0).
ecmaVersion: options.ecmaVersion,
sourceType: options.sourceType,
ranges: options.ranges,
locations: options.locations,
// Truthy value is true for backward compatibility.
allowReturnOutsideFunction: Boolean(ecmaFeatures.globalReturn),
// Collect tokens
onToken: token => {
if (tokenTranslator) {
// Use `tokens`, `ecmaVersion`, and `jsxAttrValueToken` in the state.
tokenTranslator.onToken(token, this[STATE]);
}
if (token.type !== tokTypes.eof) {
this[STATE].lastToken = token;
}
},
// Collect comments
onComment: (block, text, start, end, startLoc, endLoc) => {
if (this[STATE].comments) {
const comment = convertAcornCommentToEsprimaComment(block, text, start, end, startLoc, endLoc);
this[STATE].comments.push(comment);
}
}
}, code);
// Initialize internal state.
this[STATE] = {
tokens: tokenTranslator ? [] : null,
comments: options.comment === true ? [] : null,
impliedStrict: ecmaFeatures.impliedStrict === true && this.options.ecmaVersion >= 5,
ecmaVersion: this.options.ecmaVersion,
jsxAttrValueToken: false,
lastToken: null
};
}
tokenize() {
do {
this.next();
} while (this.type !== tokTypes.eof);
// Consume the final eof token
this.next();
const extra = this[STATE];
const tokens = extra.tokens;
if (extra.comments) {
tokens.comments = extra.comments;
}
return tokens;
}
finishNode(...args) {
const result = super.finishNode(...args);
return this[ESPRIMA_FINISH_NODE](result);
}
finishNodeAt(...args) {
const result = super.finishNodeAt(...args);
return this[ESPRIMA_FINISH_NODE](result);
}
parse() {
const extra = this[STATE];
const program = super.parse();
program.sourceType = this.options.sourceType;
if (extra.comments) {
program.comments = extra.comments;
}
if (extra.tokens) {
program.tokens = extra.tokens;
}
/*
* Adjust opening and closing position of program to match Esprima.
* Acorn always starts programs at range 0 whereas Esprima starts at the
* first AST node's start (the only real difference is when there's leading
* whitespace or leading comments). Acorn also counts trailing whitespace
* as part of the program whereas Esprima only counts up to the last token.
*/
if (program.range) {
program.range[0] = program.body.length ? program.body[0].range[0] : program.range[0];
program.range[1] = extra.lastToken ? extra.lastToken.range[1] : program.range[1];
}
if (program.loc) {
program.loc.start = program.body.length ? program.body[0].loc.start : program.loc.start;
program.loc.end = extra.lastToken ? extra.lastToken.loc.end : program.loc.end;
}
return program;
}
parseTopLevel(node) {
if (this[STATE].impliedStrict) {
this.strict = true;
}
return super.parseTopLevel(node);
}
/**
* Overwrites the default raise method to throw Esprima-style errors.
* @param {int} pos The position of the error.
* @param {string} message The error message.
* @throws {SyntaxError} A syntax error.
* @returns {void}
*/
raise(pos, message) {
const loc = Parser.acorn.getLineInfo(this.input, pos);
const err = new SyntaxError(message);
err.index = pos;
err.lineNumber = loc.line;
err.column = loc.column + 1; // acorn uses 0-based columns
throw err;
}
/**
* Overwrites the default raise method to throw Esprima-style errors.
* @param {int} pos The position of the error.
* @param {string} message The error message.
* @throws {SyntaxError} A syntax error.
* @returns {void}
*/
raiseRecoverable(pos, message) {
this.raise(pos, message);
}
/**
* Overwrites the default unexpected method to throw Esprima-style errors.
* @param {int} pos The position of the error.
* @throws {SyntaxError} A syntax error.
* @returns {void}
*/
unexpected(pos) {
let message = "Unexpected token";
if (pos !== null && pos !== void 0) {
this.pos = pos;
if (this.options.locations) {
while (this.pos < this.lineStart) {
this.lineStart = this.input.lastIndexOf("\n", this.lineStart - 2) + 1;
--this.curLine;
}
}
this.nextToken();
}
if (this.end > this.start) {
message += ` ${this.input.slice(this.start, this.end)}`;
}
this.raise(this.start, message);
}
/*
* Esprima-FB represents JSX strings as tokens called "JSXText", but Acorn-JSX
* uses regular tt.string without any distinction between this and regular JS
* strings. As such, we intercept an attempt to read a JSX string and set a flag
* on extra so that when tokens are converted, the next token will be switched
* to JSXText via onToken.
*/
jsx_readString(quote) { // eslint-disable-line camelcase
const result = super.jsx_readString(quote);
if (this.type === tokTypes.string) {
this[STATE].jsxAttrValueToken = true;
}
return result;
}
/**
* Performs last-minute Esprima-specific compatibility checks and fixes.
* @param {ASTNode} result The node to check.
* @returns {ASTNode} The finished node.
*/
[ESPRIMA_FINISH_NODE](result) {
// Acorn doesn't count the opening and closing backticks as part of templates
// so we have to adjust ranges/locations appropriately.
if (result.type === "TemplateElement") {
// additional adjustment needed if ${ is the last token
const terminalDollarBraceL = this.input.slice(result.end, result.end + 2) === "${";
if (result.range) {
result.range[0]--;
result.range[1] += (terminalDollarBraceL ? 2 : 1);
}
if (result.loc) {
result.loc.start.column--;
result.loc.end.column += (terminalDollarBraceL ? 2 : 1);
}
}
if (result.type.indexOf("Function") > -1 && !result.generator) {
result.generator = false;
}
return result;
}
};
};

29
app_vue/node_modules/espree/lib/features.js generated vendored Normal file
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/**
* @fileoverview The list of feature flags supported by the parser and their default
* settings.
* @author Nicholas C. Zakas
*/
"use strict";
//------------------------------------------------------------------------------
// Requirements
//------------------------------------------------------------------------------
// None!
//------------------------------------------------------------------------------
// Public
//------------------------------------------------------------------------------
module.exports = {
// React JSX parsing
jsx: false,
// allow return statement in global scope
globalReturn: false,
// allow implied strict mode
impliedStrict: false
};

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app_vue/node_modules/espree/lib/options.js generated vendored Normal file
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/**
* @fileoverview A collection of methods for processing Espree's options.
* @author Kai Cataldo
*/
"use strict";
//------------------------------------------------------------------------------
// Helpers
//------------------------------------------------------------------------------
const DEFAULT_ECMA_VERSION = 5;
const SUPPORTED_VERSIONS = [
3,
5,
6,
7,
8,
9,
10,
11,
12
];
/**
* Normalize ECMAScript version from the initial config
* @param {number} ecmaVersion ECMAScript version from the initial config
* @throws {Error} throws an error if the ecmaVersion is invalid.
* @returns {number} normalized ECMAScript version
*/
function normalizeEcmaVersion(ecmaVersion = DEFAULT_ECMA_VERSION) {
if (typeof ecmaVersion !== "number") {
throw new Error(`ecmaVersion must be a number. Received value of type ${typeof ecmaVersion} instead.`);
}
let version = ecmaVersion;
// Calculate ECMAScript edition number from official year version starting with
// ES2015, which corresponds with ES6 (or a difference of 2009).
if (version >= 2015) {
version -= 2009;
}
if (!SUPPORTED_VERSIONS.includes(version)) {
throw new Error("Invalid ecmaVersion.");
}
return version;
}
/**
* Normalize sourceType from the initial config
* @param {string} sourceType to normalize
* @throws {Error} throw an error if sourceType is invalid
* @returns {string} normalized sourceType
*/
function normalizeSourceType(sourceType = "script") {
if (sourceType === "script" || sourceType === "module") {
return sourceType;
}
throw new Error("Invalid sourceType.");
}
/**
* Normalize parserOptions
* @param {Object} options the parser options to normalize
* @throws {Error} throw an error if found invalid option.
* @returns {Object} normalized options
*/
function normalizeOptions(options) {
const ecmaVersion = normalizeEcmaVersion(options.ecmaVersion);
const sourceType = normalizeSourceType(options.sourceType);
const ranges = options.range === true;
const locations = options.loc === true;
if (sourceType === "module" && ecmaVersion < 6) {
throw new Error("sourceType 'module' is not supported when ecmaVersion < 2015. Consider adding `{ ecmaVersion: 2015 }` to the parser options.");
}
return Object.assign({}, options, { ecmaVersion, sourceType, ranges, locations });
}
/**
* Get the latest ECMAScript version supported by Espree.
* @returns {number} The latest ECMAScript version.
*/
function getLatestEcmaVersion() {
return SUPPORTED_VERSIONS[SUPPORTED_VERSIONS.length - 1];
}
/**
* Get the list of ECMAScript versions supported by Espree.
* @returns {number[]} An array containing the supported ECMAScript versions.
*/
function getSupportedEcmaVersions() {
return [...SUPPORTED_VERSIONS];
}
//------------------------------------------------------------------------------
// Public
//------------------------------------------------------------------------------
module.exports = {
normalizeOptions,
getLatestEcmaVersion,
getSupportedEcmaVersions
};

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/**
* @fileoverview Translates tokens between Acorn format and Esprima format.
* @author Nicholas C. Zakas
*/
/* eslint no-underscore-dangle: 0 */
"use strict";
//------------------------------------------------------------------------------
// Requirements
//------------------------------------------------------------------------------
// none!
//------------------------------------------------------------------------------
// Private
//------------------------------------------------------------------------------
// Esprima Token Types
const Token = {
Boolean: "Boolean",
EOF: "<end>",
Identifier: "Identifier",
Keyword: "Keyword",
Null: "Null",
Numeric: "Numeric",
Punctuator: "Punctuator",
String: "String",
RegularExpression: "RegularExpression",
Template: "Template",
JSXIdentifier: "JSXIdentifier",
JSXText: "JSXText"
};
/**
* Converts part of a template into an Esprima token.
* @param {AcornToken[]} tokens The Acorn tokens representing the template.
* @param {string} code The source code.
* @returns {EsprimaToken} The Esprima equivalent of the template token.
* @private
*/
function convertTemplatePart(tokens, code) {
const firstToken = tokens[0],
lastTemplateToken = tokens[tokens.length - 1];
const token = {
type: Token.Template,
value: code.slice(firstToken.start, lastTemplateToken.end)
};
if (firstToken.loc) {
token.loc = {
start: firstToken.loc.start,
end: lastTemplateToken.loc.end
};
}
if (firstToken.range) {
token.start = firstToken.range[0];
token.end = lastTemplateToken.range[1];
token.range = [token.start, token.end];
}
return token;
}
/**
* Contains logic to translate Acorn tokens into Esprima tokens.
* @param {Object} acornTokTypes The Acorn token types.
* @param {string} code The source code Acorn is parsing. This is necessary
* to correct the "value" property of some tokens.
* @constructor
*/
function TokenTranslator(acornTokTypes, code) {
// token types
this._acornTokTypes = acornTokTypes;
// token buffer for templates
this._tokens = [];
// track the last curly brace
this._curlyBrace = null;
// the source code
this._code = code;
}
TokenTranslator.prototype = {
constructor: TokenTranslator,
/**
* Translates a single Esprima token to a single Acorn token. This may be
* inaccurate due to how templates are handled differently in Esprima and
* Acorn, but should be accurate for all other tokens.
* @param {AcornToken} token The Acorn token to translate.
* @param {Object} extra Espree extra object.
* @returns {EsprimaToken} The Esprima version of the token.
*/
translate(token, extra) {
const type = token.type,
tt = this._acornTokTypes;
if (type === tt.name) {
token.type = Token.Identifier;
// TODO: See if this is an Acorn bug
if (token.value === "static") {
token.type = Token.Keyword;
}
if (extra.ecmaVersion > 5 && (token.value === "yield" || token.value === "let")) {
token.type = Token.Keyword;
}
} else if (type === tt.semi || type === tt.comma ||
type === tt.parenL || type === tt.parenR ||
type === tt.braceL || type === tt.braceR ||
type === tt.dot || type === tt.bracketL ||
type === tt.colon || type === tt.question ||
type === tt.bracketR || type === tt.ellipsis ||
type === tt.arrow || type === tt.jsxTagStart ||
type === tt.incDec || type === tt.starstar ||
type === tt.jsxTagEnd || type === tt.prefix ||
type === tt.questionDot ||
(type.binop && !type.keyword) ||
type.isAssign) {
token.type = Token.Punctuator;
token.value = this._code.slice(token.start, token.end);
} else if (type === tt.jsxName) {
token.type = Token.JSXIdentifier;
} else if (type.label === "jsxText" || type === tt.jsxAttrValueToken) {
token.type = Token.JSXText;
} else if (type.keyword) {
if (type.keyword === "true" || type.keyword === "false") {
token.type = Token.Boolean;
} else if (type.keyword === "null") {
token.type = Token.Null;
} else {
token.type = Token.Keyword;
}
} else if (type === tt.num) {
token.type = Token.Numeric;
token.value = this._code.slice(token.start, token.end);
} else if (type === tt.string) {
if (extra.jsxAttrValueToken) {
extra.jsxAttrValueToken = false;
token.type = Token.JSXText;
} else {
token.type = Token.String;
}
token.value = this._code.slice(token.start, token.end);
} else if (type === tt.regexp) {
token.type = Token.RegularExpression;
const value = token.value;
token.regex = {
flags: value.flags,
pattern: value.pattern
};
token.value = `/${value.pattern}/${value.flags}`;
}
return token;
},
/**
* Function to call during Acorn's onToken handler.
* @param {AcornToken} token The Acorn token.
* @param {Object} extra The Espree extra object.
* @returns {void}
*/
onToken(token, extra) {
const that = this,
tt = this._acornTokTypes,
tokens = extra.tokens,
templateTokens = this._tokens;
/**
* Flushes the buffered template tokens and resets the template
* tracking.
* @returns {void}
* @private
*/
function translateTemplateTokens() {
tokens.push(convertTemplatePart(that._tokens, that._code));
that._tokens = [];
}
if (token.type === tt.eof) {
// might be one last curlyBrace
if (this._curlyBrace) {
tokens.push(this.translate(this._curlyBrace, extra));
}
return;
}
if (token.type === tt.backQuote) {
// if there's already a curly, it's not part of the template
if (this._curlyBrace) {
tokens.push(this.translate(this._curlyBrace, extra));
this._curlyBrace = null;
}
templateTokens.push(token);
// it's the end
if (templateTokens.length > 1) {
translateTemplateTokens();
}
return;
}
if (token.type === tt.dollarBraceL) {
templateTokens.push(token);
translateTemplateTokens();
return;
}
if (token.type === tt.braceR) {
// if there's already a curly, it's not part of the template
if (this._curlyBrace) {
tokens.push(this.translate(this._curlyBrace, extra));
}
// store new curly for later
this._curlyBrace = token;
return;
}
if (token.type === tt.template || token.type === tt.invalidTemplate) {
if (this._curlyBrace) {
templateTokens.push(this._curlyBrace);
this._curlyBrace = null;
}
templateTokens.push(token);
return;
}
if (this._curlyBrace) {
tokens.push(this.translate(this._curlyBrace, extra));
this._curlyBrace = null;
}
tokens.push(this.translate(token, extra));
}
};
//------------------------------------------------------------------------------
// Public
//------------------------------------------------------------------------------
module.exports = TokenTranslator;

123
app_vue/node_modules/espree/lib/visitor-keys.js generated vendored Normal file
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/**
* @fileoverview The visitor keys for the node types Espree supports
* @author Nicholas C. Zakas
*
* This file contains code from estraverse-fb.
*
* The MIT license. Copyright (c) 2014 Ingvar Stepanyan
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
"use strict";
//------------------------------------------------------------------------------
// Requirements
//------------------------------------------------------------------------------
// None!
//------------------------------------------------------------------------------
// Public
//------------------------------------------------------------------------------
module.exports = {
// ECMAScript
AssignmentExpression: ["left", "right"],
AssignmentPattern: ["left", "right"],
ArrayExpression: ["elements"],
ArrayPattern: ["elements"],
ArrowFunctionExpression: ["params", "body"],
BlockStatement: ["body"],
BinaryExpression: ["left", "right"],
BreakStatement: ["label"],
CallExpression: ["callee", "arguments"],
CatchClause: ["param", "body"],
ClassBody: ["body"],
ClassDeclaration: ["id", "superClass", "body"],
ClassExpression: ["id", "superClass", "body"],
ConditionalExpression: ["test", "consequent", "alternate"],
ContinueStatement: ["label"],
DebuggerStatement: [],
DirectiveStatement: [],
DoWhileStatement: ["body", "test"],
EmptyStatement: [],
ExportAllDeclaration: ["source"],
ExportDefaultDeclaration: ["declaration"],
ExportNamedDeclaration: ["declaration", "specifiers", "source"],
ExportSpecifier: ["exported", "local"],
ExpressionStatement: ["expression"],
ForStatement: ["init", "test", "update", "body"],
ForInStatement: ["left", "right", "body"],
ForOfStatement: ["left", "right", "body"],
FunctionDeclaration: ["id", "params", "body"],
FunctionExpression: ["id", "params", "body"],
Identifier: [],
IfStatement: ["test", "consequent", "alternate"],
ImportDeclaration: ["specifiers", "source"],
ImportDefaultSpecifier: ["local"],
ImportNamespaceSpecifier: ["local"],
ImportSpecifier: ["imported", "local"],
Literal: [],
LabeledStatement: ["label", "body"],
LogicalExpression: ["left", "right"],
MemberExpression: ["object", "property"],
MetaProperty: ["meta", "property"],
MethodDefinition: ["key", "value"],
ModuleSpecifier: [],
NewExpression: ["callee", "arguments"],
ObjectExpression: ["properties"],
ObjectPattern: ["properties"],
Program: ["body"],
Property: ["key", "value"],
RestElement: ["argument"],
ReturnStatement: ["argument"],
SequenceExpression: ["expressions"],
SpreadElement: ["argument"],
Super: [],
SwitchStatement: ["discriminant", "cases"],
SwitchCase: ["test", "consequent"],
TaggedTemplateExpression: ["tag", "quasi"],
TemplateElement: [],
TemplateLiteral: ["quasis", "expressions"],
ThisExpression: [],
ThrowStatement: ["argument"],
TryStatement: ["block", "handler", "finalizer"],
UnaryExpression: ["argument"],
UpdateExpression: ["argument"],
VariableDeclaration: ["declarations"],
VariableDeclarator: ["id", "init"],
WhileStatement: ["test", "body"],
WithStatement: ["object", "body"],
YieldExpression: ["argument"],
// JSX
JSXIdentifier: [],
JSXNamespacedName: ["namespace", "name"],
JSXMemberExpression: ["object", "property"],
JSXEmptyExpression: [],
JSXExpressionContainer: ["expression"],
JSXElement: ["openingElement", "closingElement", "children"],
JSXClosingElement: ["name"],
JSXOpeningElement: ["name", "attributes"],
JSXAttribute: ["name", "value"],
JSXText: null,
JSXSpreadAttribute: ["argument"]
};

16
app_vue/node_modules/espree/node_modules/.bin/acorn generated vendored Normal file
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#!/bin/sh
basedir=$(dirname "$(echo "$0" | sed -e 's,\\,/,g')")
case `uname` in
*CYGWIN*|*MINGW*|*MSYS*)
if command -v cygpath > /dev/null 2>&1; then
basedir=`cygpath -w "$basedir"`
fi
;;
esac
if [ -x "$basedir/node" ]; then
exec "$basedir/node" "$basedir/../acorn/bin/acorn" "$@"
else
exec node "$basedir/../acorn/bin/acorn" "$@"
fi

17
app_vue/node_modules/espree/node_modules/.bin/acorn.cmd generated vendored Normal file
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@ -0,0 +1,17 @@
@ECHO off
GOTO start
:find_dp0
SET dp0=%~dp0
EXIT /b
:start
SETLOCAL
CALL :find_dp0
IF EXIST "%dp0%\node.exe" (
SET "_prog=%dp0%\node.exe"
) ELSE (
SET "_prog=node"
SET PATHEXT=%PATHEXT:;.JS;=;%
)
endLocal & goto #_undefined_# 2>NUL || title %COMSPEC% & "%_prog%" "%dp0%\..\acorn\bin\acorn" %*

28
app_vue/node_modules/espree/node_modules/.bin/acorn.ps1 generated vendored Normal file
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#!/usr/bin/env pwsh
$basedir=Split-Path $MyInvocation.MyCommand.Definition -Parent
$exe=""
if ($PSVersionTable.PSVersion -lt "6.0" -or $IsWindows) {
# Fix case when both the Windows and Linux builds of Node
# are installed in the same directory
$exe=".exe"
}
$ret=0
if (Test-Path "$basedir/node$exe") {
# Support pipeline input
if ($MyInvocation.ExpectingInput) {
$input | & "$basedir/node$exe" "$basedir/../acorn/bin/acorn" $args
} else {
& "$basedir/node$exe" "$basedir/../acorn/bin/acorn" $args
}
$ret=$LASTEXITCODE
} else {
# Support pipeline input
if ($MyInvocation.ExpectingInput) {
$input | & "node$exe" "$basedir/../acorn/bin/acorn" $args
} else {
& "node$exe" "$basedir/../acorn/bin/acorn" $args
}
$ret=$LASTEXITCODE
}
exit $ret

620
app_vue/node_modules/espree/node_modules/acorn/CHANGELOG.md generated vendored Normal file
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## 7.4.0 (2020-08-03)
### New features
Add support for logical assignment operators.
Add support for numeric separators.
## 7.3.1 (2020-06-11)
### Bug fixes
Make the string in the `version` export match the actual library version.
## 7.3.0 (2020-06-11)
### Bug fixes
Fix a bug that caused parsing of object patterns with a property named `set` that had a default value to fail.
### New features
Add support for optional chaining (`?.`).
## 7.2.0 (2020-05-09)
### Bug fixes
Fix precedence issue in parsing of async arrow functions.
### New features
Add support for nullish coalescing.
Add support for `import.meta`.
Support `export * as ...` syntax.
Upgrade to Unicode 13.
## 6.4.1 (2020-03-09)
### Bug fixes
More carefully check for valid UTF16 surrogate pairs in regexp validator.
## 7.1.1 (2020-03-01)
### Bug fixes
Treat `\8` and `\9` as invalid escapes in template strings.
Allow unicode escapes in property names that are keywords.
Don't error on an exponential operator expression as argument to `await`.
More carefully check for valid UTF16 surrogate pairs in regexp validator.
## 7.1.0 (2019-09-24)
### Bug fixes
Disallow trailing object literal commas when ecmaVersion is less than 5.
### New features
Add a static `acorn` property to the `Parser` class that contains the entire module interface, to allow plugins to access the instance of the library that they are acting on.
## 7.0.0 (2019-08-13)
### Breaking changes
Changes the node format for dynamic imports to use the `ImportExpression` node type, as defined in [ESTree](https://github.com/estree/estree/blob/master/es2020.md#importexpression).
Makes 10 (ES2019) the default value for the `ecmaVersion` option.
## 6.3.0 (2019-08-12)
### New features
`sourceType: "module"` can now be used even when `ecmaVersion` is less than 6, to parse module-style code that otherwise conforms to an older standard.
## 6.2.1 (2019-07-21)
### Bug fixes
Fix bug causing Acorn to treat some characters as identifier characters that shouldn't be treated as such.
Fix issue where setting the `allowReserved` option to `"never"` allowed reserved words in some circumstances.
## 6.2.0 (2019-07-04)
### Bug fixes
Improve valid assignment checking in `for`/`in` and `for`/`of` loops.
Disallow binding `let` in patterns.
### New features
Support bigint syntax with `ecmaVersion` >= 11.
Support dynamic `import` syntax with `ecmaVersion` >= 11.
Upgrade to Unicode version 12.
## 6.1.1 (2019-02-27)
### Bug fixes
Fix bug that caused parsing default exports of with names to fail.
## 6.1.0 (2019-02-08)
### Bug fixes
Fix scope checking when redefining a `var` as a lexical binding.
### New features
Split up `parseSubscripts` to use an internal `parseSubscript` method to make it easier to extend with plugins.
## 6.0.7 (2019-02-04)
### Bug fixes
Check that exported bindings are defined.
Don't treat `\u180e` as a whitespace character.
Check for duplicate parameter names in methods.
Don't allow shorthand properties when they are generators or async methods.
Forbid binding `await` in async arrow function's parameter list.
## 6.0.6 (2019-01-30)
### Bug fixes
The content of class declarations and expressions is now always parsed in strict mode.
Don't allow `let` or `const` to bind the variable name `let`.
Treat class declarations as lexical.
Don't allow a generator function declaration as the sole body of an `if` or `else`.
Ignore `"use strict"` when after an empty statement.
Allow string line continuations with special line terminator characters.
Treat `for` bodies as part of the `for` scope when checking for conflicting bindings.
Fix bug with parsing `yield` in a `for` loop initializer.
Implement special cases around scope checking for functions.
## 6.0.5 (2019-01-02)
### Bug fixes
Fix TypeScript type for `Parser.extend` and add `allowAwaitOutsideFunction` to options type.
Don't treat `let` as a keyword when the next token is `{` on the next line.
Fix bug that broke checking for parentheses around an object pattern in a destructuring assignment when `preserveParens` was on.
## 6.0.4 (2018-11-05)
### Bug fixes
Further improvements to tokenizing regular expressions in corner cases.
## 6.0.3 (2018-11-04)
### Bug fixes
Fix bug in tokenizing an expression-less return followed by a function followed by a regular expression.
Remove stray symlink in the package tarball.
## 6.0.2 (2018-09-26)
### Bug fixes
Fix bug where default expressions could fail to parse inside an object destructuring assignment expression.
## 6.0.1 (2018-09-14)
### Bug fixes
Fix wrong value in `version` export.
## 6.0.0 (2018-09-14)
### Bug fixes
Better handle variable-redefinition checks for catch bindings and functions directly under if statements.
Forbid `new.target` in top-level arrow functions.
Fix issue with parsing a regexp after `yield` in some contexts.
### New features
The package now comes with TypeScript definitions.
### Breaking changes
The default value of the `ecmaVersion` option is now 9 (2018).
Plugins work differently, and will have to be rewritten to work with this version.
The loose parser and walker have been moved into separate packages (`acorn-loose` and `acorn-walk`).
## 5.7.3 (2018-09-10)
### Bug fixes
Fix failure to tokenize regexps after expressions like `x.of`.
Better error message for unterminated template literals.
## 5.7.2 (2018-08-24)
### Bug fixes
Properly handle `allowAwaitOutsideFunction` in for statements.
Treat function declarations at the top level of modules like let bindings.
Don't allow async function declarations as the only statement under a label.
## 5.7.0 (2018-06-15)
### New features
Upgraded to Unicode 11.
## 5.6.0 (2018-05-31)
### New features
Allow U+2028 and U+2029 in string when ECMAVersion >= 10.
Allow binding-less catch statements when ECMAVersion >= 10.
Add `allowAwaitOutsideFunction` option for parsing top-level `await`.
## 5.5.3 (2018-03-08)
### Bug fixes
A _second_ republish of the code in 5.5.1, this time with yarn, to hopefully get valid timestamps.
## 5.5.2 (2018-03-08)
### Bug fixes
A republish of the code in 5.5.1 in an attempt to solve an issue with the file timestamps in the npm package being 0.
## 5.5.1 (2018-03-06)
### Bug fixes
Fix misleading error message for octal escapes in template strings.
## 5.5.0 (2018-02-27)
### New features
The identifier character categorization is now based on Unicode version 10.
Acorn will now validate the content of regular expressions, including new ES9 features.
## 5.4.0 (2018-02-01)
### Bug fixes
Disallow duplicate or escaped flags on regular expressions.
Disallow octal escapes in strings in strict mode.
### New features
Add support for async iteration.
Add support for object spread and rest.
## 5.3.0 (2017-12-28)
### Bug fixes
Fix parsing of floating point literals with leading zeroes in loose mode.
Allow duplicate property names in object patterns.
Don't allow static class methods named `prototype`.
Disallow async functions directly under `if` or `else`.
Parse right-hand-side of `for`/`of` as an assignment expression.
Stricter parsing of `for`/`in`.
Don't allow unicode escapes in contextual keywords.
### New features
Parsing class members was factored into smaller methods to allow plugins to hook into it.
## 5.2.1 (2017-10-30)
### Bug fixes
Fix a token context corruption bug.
## 5.2.0 (2017-10-30)
### Bug fixes
Fix token context tracking for `class` and `function` in property-name position.
Make sure `%*` isn't parsed as a valid operator.
Allow shorthand properties `get` and `set` to be followed by default values.
Disallow `super` when not in callee or object position.
### New features
Support [`directive` property](https://github.com/estree/estree/compare/b3de58c9997504d6fba04b72f76e6dd1619ee4eb...1da8e603237144f44710360f8feb7a9977e905e0) on directive expression statements.
## 5.1.2 (2017-09-04)
### Bug fixes
Disable parsing of legacy HTML-style comments in modules.
Fix parsing of async methods whose names are keywords.
## 5.1.1 (2017-07-06)
### Bug fixes
Fix problem with disambiguating regexp and division after a class.
## 5.1.0 (2017-07-05)
### Bug fixes
Fix tokenizing of regexps in an object-desctructuring `for`/`of` loop and after `yield`.
Parse zero-prefixed numbers with non-octal digits as decimal.
Allow object/array patterns in rest parameters.
Don't error when `yield` is used as a property name.
Allow `async` as a shorthand object property.
### New features
Implement the [template literal revision proposal](https://github.com/tc39/proposal-template-literal-revision) for ES9.
## 5.0.3 (2017-04-01)
### Bug fixes
Fix spurious duplicate variable definition errors for named functions.
## 5.0.2 (2017-03-30)
### Bug fixes
A binary operator after a parenthesized arrow expression is no longer incorrectly treated as an error.
## 5.0.0 (2017-03-28)
### Bug fixes
Raise an error for duplicated lexical bindings.
Fix spurious error when an assignement expression occurred after a spread expression.
Accept regular expressions after `of` (in `for`/`of`), `yield` (in a generator), and braced arrow functions.
Allow labels in front or `var` declarations, even in strict mode.
### Breaking changes
Parse declarations following `export default` as declaration nodes, not expressions. This means that class and function declarations nodes can now have `null` as their `id`.
## 4.0.11 (2017-02-07)
### Bug fixes
Allow all forms of member expressions to be parenthesized as lvalue.
## 4.0.10 (2017-02-07)
### Bug fixes
Don't expect semicolons after default-exported functions or classes, even when they are expressions.
Check for use of `'use strict'` directives in non-simple parameter functions, even when already in strict mode.
## 4.0.9 (2017-02-06)
### Bug fixes
Fix incorrect error raised for parenthesized simple assignment targets, so that `(x) = 1` parses again.
## 4.0.8 (2017-02-03)
### Bug fixes
Solve spurious parenthesized pattern errors by temporarily erring on the side of accepting programs that our delayed errors don't handle correctly yet.
## 4.0.7 (2017-02-02)
### Bug fixes
Accept invalidly rejected code like `(x).y = 2` again.
Don't raise an error when a function _inside_ strict code has a non-simple parameter list.
## 4.0.6 (2017-02-02)
### Bug fixes
Fix exponential behavior (manifesting itself as a complete hang for even relatively small source files) introduced by the new 'use strict' check.
## 4.0.5 (2017-02-02)
### Bug fixes
Disallow parenthesized pattern expressions.
Allow keywords as export names.
Don't allow the `async` keyword to be parenthesized.
Properly raise an error when a keyword contains a character escape.
Allow `"use strict"` to appear after other string literal expressions.
Disallow labeled declarations.
## 4.0.4 (2016-12-19)
### Bug fixes
Fix crash when `export` was followed by a keyword that can't be
exported.
## 4.0.3 (2016-08-16)
### Bug fixes
Allow regular function declarations inside single-statement `if` branches in loose mode. Forbid them entirely in strict mode.
Properly parse properties named `async` in ES2017 mode.
Fix bug where reserved words were broken in ES2017 mode.
## 4.0.2 (2016-08-11)
### Bug fixes
Don't ignore period or 'e' characters after octal numbers.
Fix broken parsing for call expressions in default parameter values of arrow functions.
## 4.0.1 (2016-08-08)
### Bug fixes
Fix false positives in duplicated export name errors.
## 4.0.0 (2016-08-07)
### Breaking changes
The default `ecmaVersion` option value is now 7.
A number of internal method signatures changed, so plugins might need to be updated.
### Bug fixes
The parser now raises errors on duplicated export names.
`arguments` and `eval` can now be used in shorthand properties.
Duplicate parameter names in non-simple argument lists now always produce an error.
### New features
The `ecmaVersion` option now also accepts year-style version numbers
(2015, etc).
Support for `async`/`await` syntax when `ecmaVersion` is >= 8.
Support for trailing commas in call expressions when `ecmaVersion` is >= 8.
## 3.3.0 (2016-07-25)
### Bug fixes
Fix bug in tokenizing of regexp operator after a function declaration.
Fix parser crash when parsing an array pattern with a hole.
### New features
Implement check against complex argument lists in functions that enable strict mode in ES7.
## 3.2.0 (2016-06-07)
### Bug fixes
Improve handling of lack of unicode regexp support in host
environment.
Properly reject shorthand properties whose name is a keyword.
### New features
Visitors created with `visit.make` now have their base as _prototype_, rather than copying properties into a fresh object.
## 3.1.0 (2016-04-18)
### Bug fixes
Properly tokenize the division operator directly after a function expression.
Allow trailing comma in destructuring arrays.
## 3.0.4 (2016-02-25)
### Fixes
Allow update expressions as left-hand-side of the ES7 exponential operator.
## 3.0.2 (2016-02-10)
### Fixes
Fix bug that accidentally made `undefined` a reserved word when parsing ES7.
## 3.0.0 (2016-02-10)
### Breaking changes
The default value of the `ecmaVersion` option is now 6 (used to be 5).
Support for comprehension syntax (which was dropped from the draft spec) has been removed.
### Fixes
`let` and `yield` are now “contextual keywords”, meaning you can mostly use them as identifiers in ES5 non-strict code.
A parenthesized class or function expression after `export default` is now parsed correctly.
### New features
When `ecmaVersion` is set to 7, Acorn will parse the exponentiation operator (`**`).
The identifier character ranges are now based on Unicode 8.0.0.
Plugins can now override the `raiseRecoverable` method to override the way non-critical errors are handled.
## 2.7.0 (2016-01-04)
### Fixes
Stop allowing rest parameters in setters.
Disallow `y` rexexp flag in ES5.
Disallow `\00` and `\000` escapes in strict mode.
Raise an error when an import name is a reserved word.
## 2.6.2 (2015-11-10)
### Fixes
Don't crash when no options object is passed.
## 2.6.0 (2015-11-09)
### Fixes
Add `await` as a reserved word in module sources.
Disallow `yield` in a parameter default value for a generator.
Forbid using a comma after a rest pattern in an array destructuring.
### New features
Support parsing stdin in command-line tool.
## 2.5.0 (2015-10-27)
### Fixes
Fix tokenizer support in the command-line tool.
Stop allowing `new.target` outside of functions.
Remove legacy `guard` and `guardedHandler` properties from try nodes.
Stop allowing multiple `__proto__` properties on an object literal in strict mode.
Don't allow rest parameters to be non-identifier patterns.
Check for duplicate paramter names in arrow functions.

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MIT License
Copyright (C) 2012-2018 by various contributors (see AUTHORS)
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.

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# Acorn
A tiny, fast JavaScript parser written in JavaScript.
## Community
Acorn is open source software released under an
[MIT license](https://github.com/acornjs/acorn/blob/master/acorn/LICENSE).
You are welcome to
[report bugs](https://github.com/acornjs/acorn/issues) or create pull
requests on [github](https://github.com/acornjs/acorn). For questions
and discussion, please use the
[Tern discussion forum](https://discuss.ternjs.net).
## Installation
The easiest way to install acorn is from [`npm`](https://www.npmjs.com/):
```sh
npm install acorn
```
Alternately, you can download the source and build acorn yourself:
```sh
git clone https://github.com/acornjs/acorn.git
cd acorn
npm install
```
## Interface
**parse**`(input, options)` is the main interface to the library. The
`input` parameter is a string, `options` can be undefined or an object
setting some of the options listed below. The return value will be an
abstract syntax tree object as specified by the [ESTree
spec](https://github.com/estree/estree).
```javascript
let acorn = require("acorn");
console.log(acorn.parse("1 + 1"));
```
When encountering a syntax error, the parser will raise a
`SyntaxError` object with a meaningful message. The error object will
have a `pos` property that indicates the string offset at which the
error occurred, and a `loc` object that contains a `{line, column}`
object referring to that same position.
Options can be provided by passing a second argument, which should be
an object containing any of these fields:
- **ecmaVersion**: Indicates the ECMAScript version to parse. Must be
either 3, 5, 6 (2015), 7 (2016), 8 (2017), 9 (2018), 10 (2019) or 11
(2020, partial support). This influences support for strict mode,
the set of reserved words, and support for new syntax features.
Default is 10.
**NOTE**: Only 'stage 4' (finalized) ECMAScript features are being
implemented by Acorn. Other proposed new features can be implemented
through plugins.
- **sourceType**: Indicate the mode the code should be parsed in. Can be
either `"script"` or `"module"`. This influences global strict mode
and parsing of `import` and `export` declarations.
**NOTE**: If set to `"module"`, then static `import` / `export` syntax
will be valid, even if `ecmaVersion` is less than 6.
- **onInsertedSemicolon**: If given a callback, that callback will be
called whenever a missing semicolon is inserted by the parser. The
callback will be given the character offset of the point where the
semicolon is inserted as argument, and if `locations` is on, also a
`{line, column}` object representing this position.
- **onTrailingComma**: Like `onInsertedSemicolon`, but for trailing
commas.
- **allowReserved**: If `false`, using a reserved word will generate
an error. Defaults to `true` for `ecmaVersion` 3, `false` for higher
versions. When given the value `"never"`, reserved words and
keywords can also not be used as property names (as in Internet
Explorer's old parser).
- **allowReturnOutsideFunction**: By default, a return statement at
the top level raises an error. Set this to `true` to accept such
code.
- **allowImportExportEverywhere**: By default, `import` and `export`
declarations can only appear at a program's top level. Setting this
option to `true` allows them anywhere where a statement is allowed.
- **allowAwaitOutsideFunction**: By default, `await` expressions can
only appear inside `async` functions. Setting this option to
`true` allows to have top-level `await` expressions. They are
still not allowed in non-`async` functions, though.
- **allowHashBang**: When this is enabled (off by default), if the
code starts with the characters `#!` (as in a shellscript), the
first line will be treated as a comment.
- **locations**: When `true`, each node has a `loc` object attached
with `start` and `end` subobjects, each of which contains the
one-based line and zero-based column numbers in `{line, column}`
form. Default is `false`.
- **onToken**: If a function is passed for this option, each found
token will be passed in same format as tokens returned from
`tokenizer().getToken()`.
If array is passed, each found token is pushed to it.
Note that you are not allowed to call the parser from the
callback—that will corrupt its internal state.
- **onComment**: If a function is passed for this option, whenever a
comment is encountered the function will be called with the
following parameters:
- `block`: `true` if the comment is a block comment, false if it
is a line comment.
- `text`: The content of the comment.
- `start`: Character offset of the start of the comment.
- `end`: Character offset of the end of the comment.
When the `locations` options is on, the `{line, column}` locations
of the comment’s start and end are passed as two additional
parameters.
If array is passed for this option, each found comment is pushed
to it as object in Esprima format:
```javascript
{
"type": "Line" | "Block",
"value": "comment text",
"start": Number,
"end": Number,
// If `locations` option is on:
"loc": {
"start": {line: Number, column: Number}
"end": {line: Number, column: Number}
},
// If `ranges` option is on:
"range": [Number, Number]
}
```
Note that you are not allowed to call the parser from the
callback—that will corrupt its internal state.
- **ranges**: Nodes have their start and end characters offsets
recorded in `start` and `end` properties (directly on the node,
rather than the `loc` object, which holds line/column data. To also
add a
[semi-standardized](https://bugzilla.mozilla.org/show_bug.cgi?id=745678)
`range` property holding a `[start, end]` array with the same
numbers, set the `ranges` option to `true`.
- **program**: It is possible to parse multiple files into a single
AST by passing the tree produced by parsing the first file as the
`program` option in subsequent parses. This will add the toplevel
forms of the parsed file to the "Program" (top) node of an existing
parse tree.
- **sourceFile**: When the `locations` option is `true`, you can pass
this option to add a `source` attribute in every node’s `loc`
object. Note that the contents of this option are not examined or
processed in any way; you are free to use whatever format you
choose.
- **directSourceFile**: Like `sourceFile`, but a `sourceFile` property
will be added (regardless of the `location` option) directly to the
nodes, rather than the `loc` object.
- **preserveParens**: If this option is `true`, parenthesized expressions
are represented by (non-standard) `ParenthesizedExpression` nodes
that have a single `expression` property containing the expression
inside parentheses.
**parseExpressionAt**`(input, offset, options)` will parse a single
expression in a string, and return its AST. It will not complain if
there is more of the string left after the expression.
**tokenizer**`(input, options)` returns an object with a `getToken`
method that can be called repeatedly to get the next token, a `{start,
end, type, value}` object (with added `loc` property when the
`locations` option is enabled and `range` property when the `ranges`
option is enabled). When the token's type is `tokTypes.eof`, you
should stop calling the method, since it will keep returning that same
token forever.
In ES6 environment, returned result can be used as any other
protocol-compliant iterable:
```javascript
for (let token of acorn.tokenizer(str)) {
// iterate over the tokens
}
// transform code to array of tokens:
var tokens = [...acorn.tokenizer(str)];
```
**tokTypes** holds an object mapping names to the token type objects
that end up in the `type` properties of tokens.
**getLineInfo**`(input, offset)` can be used to get a `{line,
column}` object for a given program string and offset.
### The `Parser` class
Instances of the **`Parser`** class contain all the state and logic
that drives a parse. It has static methods `parse`,
`parseExpressionAt`, and `tokenizer` that match the top-level
functions by the same name.
When extending the parser with plugins, you need to call these methods
on the extended version of the class. To extend a parser with plugins,
you can use its static `extend` method.
```javascript
var acorn = require("acorn");
var jsx = require("acorn-jsx");
var JSXParser = acorn.Parser.extend(jsx());
JSXParser.parse("foo(<bar/>)");
```
The `extend` method takes any number of plugin values, and returns a
new `Parser` class that includes the extra parser logic provided by
the plugins.
## Command line interface
The `bin/acorn` utility can be used to parse a file from the command
line. It accepts as arguments its input file and the following
options:
- `--ecma3|--ecma5|--ecma6|--ecma7|--ecma8|--ecma9|--ecma10`: Sets the ECMAScript version
to parse. Default is version 9.
- `--module`: Sets the parsing mode to `"module"`. Is set to `"script"` otherwise.
- `--locations`: Attaches a "loc" object to each node with "start" and
"end" subobjects, each of which contains the one-based line and
zero-based column numbers in `{line, column}` form.
- `--allow-hash-bang`: If the code starts with the characters #! (as
in a shellscript), the first line will be treated as a comment.
- `--compact`: No whitespace is used in the AST output.
- `--silent`: Do not output the AST, just return the exit status.
- `--help`: Print the usage information and quit.
The utility spits out the syntax tree as JSON data.
## Existing plugins
- [`acorn-jsx`](https://github.com/RReverser/acorn-jsx): Parse [Facebook JSX syntax extensions](https://github.com/facebook/jsx)
Plugins for ECMAScript proposals:
- [`acorn-stage3`](https://github.com/acornjs/acorn-stage3): Parse most stage 3 proposals, bundling:
- [`acorn-class-fields`](https://github.com/acornjs/acorn-class-fields): Parse [class fields proposal](https://github.com/tc39/proposal-class-fields)
- [`acorn-import-meta`](https://github.com/acornjs/acorn-import-meta): Parse [import.meta proposal](https://github.com/tc39/proposal-import-meta)
- [`acorn-private-methods`](https://github.com/acornjs/acorn-private-methods): parse [private methods, getters and setters proposal](https://github.com/tc39/proposal-private-methods)n

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#!/usr/bin/env node
'use strict';
require('../dist/bin.js');

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export as namespace acorn
export = acorn
declare namespace acorn {
function parse(input: string, options?: Options): Node
function parseExpressionAt(input: string, pos?: number, options?: Options): Node
function tokenizer(input: string, options?: Options): {
getToken(): Token
[Symbol.iterator](): Iterator<Token>
}
interface Options {
ecmaVersion?: 3 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 2015 | 2016 | 2017 | 2018 | 2019 | 2020
sourceType?: 'script' | 'module'
onInsertedSemicolon?: (lastTokEnd: number, lastTokEndLoc?: Position) => void
onTrailingComma?: (lastTokEnd: number, lastTokEndLoc?: Position) => void
allowReserved?: boolean | 'never'
allowReturnOutsideFunction?: boolean
allowImportExportEverywhere?: boolean
allowAwaitOutsideFunction?: boolean
allowHashBang?: boolean
locations?: boolean
onToken?: ((token: Token) => any) | Token[]
onComment?: ((
isBlock: boolean, text: string, start: number, end: number, startLoc?: Position,
endLoc?: Position
) => void) | Comment[]
ranges?: boolean
program?: Node
sourceFile?: string
directSourceFile?: string
preserveParens?: boolean
}
class Parser {
constructor(options: Options, input: string, startPos?: number)
parse(this: Parser): Node
static parse(this: typeof Parser, input: string, options?: Options): Node
static parseExpressionAt(this: typeof Parser, input: string, pos: number, options?: Options): Node
static tokenizer(this: typeof Parser, input: string, options?: Options): {
getToken(): Token
[Symbol.iterator](): Iterator<Token>
}
static extend(this: typeof Parser, ...plugins: ((BaseParser: typeof Parser) => typeof Parser)[]): typeof Parser
}
interface Position { line: number; column: number; offset: number }
const defaultOptions: Options
function getLineInfo(input: string, offset: number): Position
class SourceLocation {
start: Position
end: Position
source?: string | null
constructor(p: Parser, start: Position, end: Position)
}
class Node {
type: string
start: number
end: number
loc?: SourceLocation
sourceFile?: string
range?: [number, number]
constructor(parser: Parser, pos: number, loc?: SourceLocation)
}
class TokenType {
label: string
keyword: string
beforeExpr: boolean
startsExpr: boolean
isLoop: boolean
isAssign: boolean
prefix: boolean
postfix: boolean
binop: number
updateContext?: (prevType: TokenType) => void
constructor(label: string, conf?: any)
}
const tokTypes: {
num: TokenType
regexp: TokenType
string: TokenType
name: TokenType
eof: TokenType
bracketL: TokenType
bracketR: TokenType
braceL: TokenType
braceR: TokenType
parenL: TokenType
parenR: TokenType
comma: TokenType
semi: TokenType
colon: TokenType
dot: TokenType
question: TokenType
arrow: TokenType
template: TokenType
ellipsis: TokenType
backQuote: TokenType
dollarBraceL: TokenType
eq: TokenType
assign: TokenType
incDec: TokenType
prefix: TokenType
logicalOR: TokenType
logicalAND: TokenType
bitwiseOR: TokenType
bitwiseXOR: TokenType
bitwiseAND: TokenType
equality: TokenType
relational: TokenType
bitShift: TokenType
plusMin: TokenType
modulo: TokenType
star: TokenType
slash: TokenType
starstar: TokenType
_break: TokenType
_case: TokenType
_catch: TokenType
_continue: TokenType
_debugger: TokenType
_default: TokenType
_do: TokenType
_else: TokenType
_finally: TokenType
_for: TokenType
_function: TokenType
_if: TokenType
_return: TokenType
_switch: TokenType
_throw: TokenType
_try: TokenType
_var: TokenType
_const: TokenType
_while: TokenType
_with: TokenType
_new: TokenType
_this: TokenType
_super: TokenType
_class: TokenType
_extends: TokenType
_export: TokenType
_import: TokenType
_null: TokenType
_true: TokenType
_false: TokenType
_in: TokenType
_instanceof: TokenType
_typeof: TokenType
_void: TokenType
_delete: TokenType
}
class TokContext {
constructor(token: string, isExpr: boolean, preserveSpace: boolean, override?: (p: Parser) => void)
}
const tokContexts: {
b_stat: TokContext
b_expr: TokContext
b_tmpl: TokContext
p_stat: TokContext
p_expr: TokContext
q_tmpl: TokContext
f_expr: TokContext
}
function isIdentifierStart(code: number, astral?: boolean): boolean
function isIdentifierChar(code: number, astral?: boolean): boolean
interface AbstractToken {
}
interface Comment extends AbstractToken {
type: string
value: string
start: number
end: number
loc?: SourceLocation
range?: [number, number]
}
class Token {
type: TokenType
value: any
start: number
end: number
loc?: SourceLocation
range?: [number, number]
constructor(p: Parser)
}
function isNewLine(code: number): boolean
const lineBreak: RegExp
const lineBreakG: RegExp
const version: string
}

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import * as acorn from "./acorn";
export = acorn;

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'use strict';
var path = require('path');
var fs = require('fs');
var acorn = require('./acorn.js');
var infile, forceFile, silent = false, compact = false, tokenize = false;
var options = {};
function help(status) {
var print = (status === 0) ? console.log : console.error;
print("usage: " + path.basename(process.argv[1]) + " [--ecma3|--ecma5|--ecma6|--ecma7|--ecma8|--ecma9|...|--ecma2015|--ecma2016|--ecma2017|--ecma2018|...]");
print(" [--tokenize] [--locations] [---allow-hash-bang] [--compact] [--silent] [--module] [--help] [--] [infile]");
process.exit(status);
}
for (var i = 2; i < process.argv.length; ++i) {
var arg = process.argv[i];
if ((arg === "-" || arg[0] !== "-") && !infile) { infile = arg; }
else if (arg === "--" && !infile && i + 2 === process.argv.length) { forceFile = infile = process.argv[++i]; }
else if (arg === "--locations") { options.locations = true; }
else if (arg === "--allow-hash-bang") { options.allowHashBang = true; }
else if (arg === "--silent") { silent = true; }
else if (arg === "--compact") { compact = true; }
else if (arg === "--help") { help(0); }
else if (arg === "--tokenize") { tokenize = true; }
else if (arg === "--module") { options.sourceType = "module"; }
else {
var match = arg.match(/^--ecma(\d+)$/);
if (match)
{ options.ecmaVersion = +match[1]; }
else
{ help(1); }
}
}
function run(code) {
var result;
try {
if (!tokenize) {
result = acorn.parse(code, options);
} else {
result = [];
var tokenizer = acorn.tokenizer(code, options), token;
do {
token = tokenizer.getToken();
result.push(token);
} while (token.type !== acorn.tokTypes.eof)
}
} catch (e) {
console.error(infile && infile !== "-" ? e.message.replace(/\(\d+:\d+\)$/, function (m) { return m.slice(0, 1) + infile + " " + m.slice(1); }) : e.message);
process.exit(1);
}
if (!silent) { console.log(JSON.stringify(result, null, compact ? null : 2)); }
}
if (forceFile || infile && infile !== "-") {
run(fs.readFileSync(infile, "utf8"));
} else {
var code = "";
process.stdin.resume();
process.stdin.on("data", function (chunk) { return code += chunk; });
process.stdin.on("end", function () { return run(code); });
}

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{
"name": "acorn",
"description": "ECMAScript parser",
"homepage": "https://github.com/acornjs/acorn",
"main": "dist/acorn.js",
"types": "dist/acorn.d.ts",
"module": "dist/acorn.mjs",
"version": "7.4.1",
"engines": {"node": ">=0.4.0"},
"maintainers": [
{
"name": "Marijn Haverbeke",
"email": "marijnh@gmail.com",
"web": "https://marijnhaverbeke.nl"
},
{
"name": "Ingvar Stepanyan",
"email": "me@rreverser.com",
"web": "https://rreverser.com/"
},
{
"name": "Adrian Heine",
"web": "http://adrianheine.de"
}
],
"repository": {
"type": "git",
"url": "https://github.com/acornjs/acorn.git"
},
"license": "MIT",
"scripts": {
"prepare": "cd ..; npm run build:main && npm run build:bin"
},
"bin": {"acorn": "./bin/acorn"}
}

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v1.3.0 - June 19, 2020
* [`c92dd7f`](https://github.com/eslint/eslint-visitor-keys/commit/c92dd7ff96f0044dba12d681406a025b92b4c437) Update: add `ChainExpression` node (#12) (Toru Nagashima)
v1.2.0 - June 4, 2020
* [`21f28bf`](https://github.com/eslint/eslint-visitor-keys/commit/21f28bf11be5329d740a8bf6bdbcd0ef13bbf1a2) Update: added exported in exportAllDeclaration key (#10) (Anix)
v1.1.0 - August 13, 2019
* [`9331cc0`](https://github.com/eslint/eslint-visitor-keys/commit/9331cc09e756e65b9044c9186445a474b037fac6) Update: add ImportExpression (#8) (Toru Nagashima)
* [`5967f58`](https://github.com/eslint/eslint-visitor-keys/commit/5967f583b04f17fba9226aaa394e45d476d2b8af) Chore: add supported Node.js versions to CI (#7) (Kai Cataldo)
* [`6f7c60f`](https://github.com/eslint/eslint-visitor-keys/commit/6f7c60fef2ceec9f6323202df718321cec45cab0) Upgrade: eslint-release@1.0.0 (#5) (Teddy Katz)
v1.0.0 - December 18, 2017
* 1f6bd38 Breaking: update keys (#4) (Toru Nagashima)
v0.1.0 - November 17, 2017
* 17b4a88 Chore: update `repository` field in package.json (#3) (Toru Nagashima)
* a5a026b New: eslint-visitor-keys (#1) (Toru Nagashima)
* a1a48b8 Update: Change license to Apache 2 (#2) (Ilya Volodin)
* 2204715 Initial commit (Toru Nagashima)

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# eslint-visitor-keys
[![npm version](https://img.shields.io/npm/v/eslint-visitor-keys.svg)](https://www.npmjs.com/package/eslint-visitor-keys)
[![Downloads/month](https://img.shields.io/npm/dm/eslint-visitor-keys.svg)](http://www.npmtrends.com/eslint-visitor-keys)
[![Build Status](https://travis-ci.org/eslint/eslint-visitor-keys.svg?branch=master)](https://travis-ci.org/eslint/eslint-visitor-keys)
[![Dependency Status](https://david-dm.org/eslint/eslint-visitor-keys.svg)](https://david-dm.org/eslint/eslint-visitor-keys)
Constants and utilities about visitor keys to traverse AST.
## 💿 Installation
Use [npm] to install.
```bash
$ npm install eslint-visitor-keys
```
### Requirements
- [Node.js] 4.0.0 or later.
## 📖 Usage
```js
const evk = require("eslint-visitor-keys")
```
### evk.KEYS
> type: `{ [type: string]: string[] | undefined }`
Visitor keys. This keys are frozen.
This is an object. Keys are the type of [ESTree] nodes. Their values are an array of property names which have child nodes.
For example:
```
console.log(evk.KEYS.AssignmentExpression) // → ["left", "right"]
```
### evk.getKeys(node)
> type: `(node: object) => string[]`
Get the visitor keys of a given AST node.
This is similar to `Object.keys(node)` of ES Standard, but some keys are excluded: `parent`, `leadingComments`, `trailingComments`, and names which start with `_`.
This will be used to traverse unknown nodes.
For example:
```
const node = {
type: "AssignmentExpression",
left: { type: "Identifier", name: "foo" },
right: { type: "Literal", value: 0 }
}
console.log(evk.getKeys(node)) // → ["type", "left", "right"]
```
### evk.unionWith(additionalKeys)
> type: `(additionalKeys: object) => { [type: string]: string[] | undefined }`
Make the union set with `evk.KEYS` and the given keys.
- The order of keys is, `additionalKeys` is at first, then `evk.KEYS` is concatenated after that.
- It removes duplicated keys as keeping the first one.
For example:
```
console.log(evk.unionWith({
MethodDefinition: ["decorators"]
})) // → { ..., MethodDefinition: ["decorators", "key", "value"], ... }
```
## 📰 Change log
See [GitHub releases](https://github.com/eslint/eslint-visitor-keys/releases).
## 🍻 Contributing
Welcome. See [ESLint contribution guidelines](https://eslint.org/docs/developer-guide/contributing/).
### Development commands
- `npm test` runs tests and measures code coverage.
- `npm run lint` checks source codes with ESLint.
- `npm run coverage` opens the code coverage report of the previous test with your default browser.
- `npm run release` publishes this package to [npm] registory.
[npm]: https://www.npmjs.com/
[Node.js]: https://nodejs.org/en/
[ESTree]: https://github.com/estree/estree

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/**
* @author Toru Nagashima <https://github.com/mysticatea>
* See LICENSE file in root directory for full license.
*/
"use strict";
const KEYS = require("./visitor-keys.json");
// Types.
const NODE_TYPES = Object.freeze(Object.keys(KEYS));
// Freeze the keys.
for (const type of NODE_TYPES) {
Object.freeze(KEYS[type]);
}
Object.freeze(KEYS);
// List to ignore keys.
const KEY_BLACKLIST = new Set([
"parent",
"leadingComments",
"trailingComments"
]);
/**
* Check whether a given key should be used or not.
* @param {string} key The key to check.
* @returns {boolean} `true` if the key should be used.
*/
function filterKey(key) {
return !KEY_BLACKLIST.has(key) && key[0] !== "_";
}
//------------------------------------------------------------------------------
// Public interfaces
//------------------------------------------------------------------------------
module.exports = Object.freeze({
/**
* Visitor keys.
* @type {{ [type: string]: string[] | undefined }}
*/
KEYS,
/**
* Get visitor keys of a given node.
* @param {Object} node The AST node to get keys.
* @returns {string[]} Visitor keys of the node.
*/
getKeys(node) {
return Object.keys(node).filter(filterKey);
},
// Disable valid-jsdoc rule because it reports syntax error on the type of @returns.
// eslint-disable-next-line valid-jsdoc
/**
* Make the union set with `KEYS` and given keys.
* @param {Object} additionalKeys The additional keys.
* @returns {{ [type: string]: string[] | undefined }} The union set.
*/
unionWith(additionalKeys) {
const retv = Object.assign({}, KEYS);
for (const type of Object.keys(additionalKeys)) {
if (retv.hasOwnProperty(type)) {
const keys = new Set(additionalKeys[type]);
for (const key of retv[type]) {
keys.add(key);
}
retv[type] = Object.freeze(Array.from(keys));
} else {
retv[type] = Object.freeze(Array.from(additionalKeys[type]));
}
}
return Object.freeze(retv);
}
});

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{
"AssignmentExpression": [
"left",
"right"
],
"AssignmentPattern": [
"left",
"right"
],
"ArrayExpression": [
"elements"
],
"ArrayPattern": [
"elements"
],
"ArrowFunctionExpression": [
"params",
"body"
],
"AwaitExpression": [
"argument"
],
"BlockStatement": [
"body"
],
"BinaryExpression": [
"left",
"right"
],
"BreakStatement": [
"label"
],
"CallExpression": [
"callee",
"arguments"
],
"CatchClause": [
"param",
"body"
],
"ChainExpression": [
"expression"
],
"ClassBody": [
"body"
],
"ClassDeclaration": [
"id",
"superClass",
"body"
],
"ClassExpression": [
"id",
"superClass",
"body"
],
"ConditionalExpression": [
"test",
"consequent",
"alternate"
],
"ContinueStatement": [
"label"
],
"DebuggerStatement": [],
"DoWhileStatement": [
"body",
"test"
],
"EmptyStatement": [],
"ExportAllDeclaration": [
"exported",
"source"
],
"ExportDefaultDeclaration": [
"declaration"
],
"ExportNamedDeclaration": [
"declaration",
"specifiers",
"source"
],
"ExportSpecifier": [
"exported",
"local"
],
"ExpressionStatement": [
"expression"
],
"ExperimentalRestProperty": [
"argument"
],
"ExperimentalSpreadProperty": [
"argument"
],
"ForStatement": [
"init",
"test",
"update",
"body"
],
"ForInStatement": [
"left",
"right",
"body"
],
"ForOfStatement": [
"left",
"right",
"body"
],
"FunctionDeclaration": [
"id",
"params",
"body"
],
"FunctionExpression": [
"id",
"params",
"body"
],
"Identifier": [],
"IfStatement": [
"test",
"consequent",
"alternate"
],
"ImportDeclaration": [
"specifiers",
"source"
],
"ImportDefaultSpecifier": [
"local"
],
"ImportExpression": [
"source"
],
"ImportNamespaceSpecifier": [
"local"
],
"ImportSpecifier": [
"imported",
"local"
],
"JSXAttribute": [
"name",
"value"
],
"JSXClosingElement": [
"name"
],
"JSXElement": [
"openingElement",
"children",
"closingElement"
],
"JSXEmptyExpression": [],
"JSXExpressionContainer": [
"expression"
],
"JSXIdentifier": [],
"JSXMemberExpression": [
"object",
"property"
],
"JSXNamespacedName": [
"namespace",
"name"
],
"JSXOpeningElement": [
"name",
"attributes"
],
"JSXSpreadAttribute": [
"argument"
],
"JSXText": [],
"JSXFragment": [
"openingFragment",
"children",
"closingFragment"
],
"Literal": [],
"LabeledStatement": [
"label",
"body"
],
"LogicalExpression": [
"left",
"right"
],
"MemberExpression": [
"object",
"property"
],
"MetaProperty": [
"meta",
"property"
],
"MethodDefinition": [
"key",
"value"
],
"NewExpression": [
"callee",
"arguments"
],
"ObjectExpression": [
"properties"
],
"ObjectPattern": [
"properties"
],
"Program": [
"body"
],
"Property": [
"key",
"value"
],
"RestElement": [
"argument"
],
"ReturnStatement": [
"argument"
],
"SequenceExpression": [
"expressions"
],
"SpreadElement": [
"argument"
],
"Super": [],
"SwitchStatement": [
"discriminant",
"cases"
],
"SwitchCase": [
"test",
"consequent"
],
"TaggedTemplateExpression": [
"tag",
"quasi"
],
"TemplateElement": [],
"TemplateLiteral": [
"quasis",
"expressions"
],
"ThisExpression": [],
"ThrowStatement": [
"argument"
],
"TryStatement": [
"block",
"handler",
"finalizer"
],
"UnaryExpression": [
"argument"
],
"UpdateExpression": [
"argument"
],
"VariableDeclaration": [
"declarations"
],
"VariableDeclarator": [
"id",
"init"
],
"WhileStatement": [
"test",
"body"
],
"WithStatement": [
"object",
"body"
],
"YieldExpression": [
"argument"
]
}

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{
"name": "eslint-visitor-keys",
"version": "1.3.0",
"description": "Constants and utilities about visitor keys to traverse AST.",
"main": "lib/index.js",
"files": [
"lib"
],
"engines": {
"node": ">=4"
},
"dependencies": {},
"devDependencies": {
"eslint": "^4.7.2",
"eslint-config-eslint": "^4.0.0",
"eslint-release": "^1.0.0",
"mocha": "^3.5.3",
"nyc": "^11.2.1",
"opener": "^1.4.3"
},
"scripts": {
"lint": "eslint lib tests/lib",
"pretest": "npm run -s lint",
"test": "nyc mocha tests/lib",
"coverage": "nyc report --reporter lcov && opener coverage/lcov-report/index.html",
"generate-release": "eslint-generate-release",
"generate-alpharelease": "eslint-generate-prerelease alpha",
"generate-betarelease": "eslint-generate-prerelease beta",
"generate-rcrelease": "eslint-generate-prerelease rc",
"publish-release": "eslint-publish-release"
},
"repository": "eslint/eslint-visitor-keys",
"keywords": [],
"author": "Toru Nagashima (https://github.com/mysticatea)",
"license": "Apache-2.0",
"bugs": {
"url": "https://github.com/eslint/eslint-visitor-keys/issues"
},
"homepage": "https://github.com/eslint/eslint-visitor-keys#readme"
}

64
app_vue/node_modules/espree/package.json generated vendored Normal file
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@ -0,0 +1,64 @@
{
"name": "espree",
"description": "An Esprima-compatible JavaScript parser built on Acorn",
"author": "Nicholas C. Zakas <nicholas+npm@nczconsulting.com>",
"homepage": "https://github.com/eslint/espree",
"main": "espree.js",
"version": "7.3.1",
"files": [
"lib",
"espree.js"
],
"engines": {
"node": "^10.12.0 || >=12.0.0"
},
"repository": "eslint/espree",
"bugs": {
"url": "http://github.com/eslint/espree.git"
},
"license": "BSD-2-Clause",
"dependencies": {
"acorn": "^7.4.0",
"acorn-jsx": "^5.3.1",
"eslint-visitor-keys": "^1.3.0"
},
"devDependencies": {
"browserify": "^16.5.0",
"chai": "^4.2.0",
"eslint": "^6.0.1",
"eslint-config-eslint": "^5.0.1",
"eslint-plugin-node": "^9.1.0",
"eslint-release": "^1.0.0",
"esprima": "latest",
"esprima-fb": "^8001.2001.0-dev-harmony-fb",
"json-diff": "^0.5.4",
"leche": "^2.3.0",
"mocha": "^6.2.0",
"nyc": "^14.1.1",
"regenerate": "^1.4.0",
"shelljs": "^0.3.0",
"shelljs-nodecli": "^0.1.1",
"unicode-6.3.0": "^0.7.5"
},
"keywords": [
"ast",
"ecmascript",
"javascript",
"parser",
"syntax",
"acorn"
],
"scripts": {
"generate-regex": "node tools/generate-identifier-regex.js",
"test": "npm run-script lint && node Makefile.js test",
"lint": "node Makefile.js lint",
"fixlint": "node Makefile.js lint --fix",
"sync-docs": "node Makefile.js docs",
"browserify": "node Makefile.js browserify",
"generate-release": "eslint-generate-release",
"generate-alpharelease": "eslint-generate-prerelease alpha",
"generate-betarelease": "eslint-generate-prerelease beta",
"generate-rcrelease": "eslint-generate-prerelease rc",
"publish-release": "eslint-publish-release"
}
}