https://github.com/babel/acorn-to-esprima

(unmaintained) Converts acorn tokens to esprima tokens
https://github.com/babel/acorn-to-esprima

unmaintained

Last synced: 3 months ago
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(unmaintained) Converts acorn tokens to esprima tokens

• Host: GitHub
• URL: https://github.com/babel/acorn-to-esprima
• Owner: babel
• License: mit
• Archived: true
• Created: 2015-07-10T22:28:08.000Z (over 9 years ago)
• Default Branch: master
• Last Pushed: 2016-07-13T23:39:37.000Z (over 8 years ago)
• Last Synced: 2024-04-14T01:39:09.424Z (9 months ago)
• Topics: unmaintained
• Language: JavaScript
• Homepage:
• Size: 23.4 KB
• Stars: 33
• Watchers: 18
• Forks: 11
• Open Issues: 1
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

        
# acorn-to-esprima

Some functions to help transform an acorn/babel ast to esprima format.

Primarily for use in [babel-eslint](https://github.com/babel/babel-eslint), [babel-jscs](https://github.com/jscs-dev/babel-jscs), and [ast explorer](https://github.com/fkling/esprima_ast_explorer)

**There are no dependencies** (the methods were changed to pass in dependencies instead)

The current functions exposed are:

- `function attachComments(ast, comments, tokens)`

  - This modifies the comments passed in.

- `function toTokens(tokens, tt)`

  - `tt` is `require("babel-core").acorn.tokTypes`

  - Converts template string tokens (`convertTemplateType`)

  - filters out comment tokens

  - runs `toToken` over each token

- `function toToken(token, tt)`

  - Sets `token.type`, `token.range`, and `token.value`

- `function toAST(ast, traverse)`

  - `traverse` is `require("babel-core").traverse;`

  - traverses over the ast and makes any necessary changes (usually es6+)

- `function convertComments(comments)`

  - Modifies `comment.type`

How to use:

Check out the parse method of https://github.com/babel/babel-eslint/blob/master/index.js

```js

// example

exports.parse = function (code) {

  var comments = opts.onComment = [];

  var tokens = opts.onToken = [];

  var ast;

  try {

    ast = parse(code, {

        locations: true,

        ranges: true

    });

  } catch (err) { throw err; }

  tokens.pop();

  ast.tokens = acornToEsprima.toTokens(tokens, tt);

  acornToEsprima.convertComments(comments);

  ast.comments = comments;

  acornToEsprima.attachComments(ast, comments, ast.tokens);

  acornToEsprima.toAST(ast, traverse);

  return ast;

}

```