incorrect token type for negated regexp

[KaelWD]

See vuejs/eslint-plugin-vue#349

Original code:

return (
  // it's inside node_modules
  /node_modules/.test(module.context) &&
  // and not a CSS file (due to extract-text-webpack-plugin limitation)
  !/\.css$/.test(module.request)
)

The token passed into isComment: (it's the ! before the regexp)

{
  "type": {
    "label": "!",
    "beforeExpr": true,
    "startsExpr": true,
    "rightAssociative": false,
    "isLoop": false,
    "isAssign": false,
    "prefix": true,
    "postfix": false,
    "binop": null,
    "updateContext": null
  },
  "value": "!",
  "start": 963,
  "end": 964,
  "loc": {
    "start": {
      "line": 26,
      "column": 10
    },
    "end": {
      "line": 26,
      "column": 11
    }
  },
  "range": [
    963,
    964
  ]
}

As ESLint AST spec, the type must be a string
— mysticatea

[mysticatea]

Hi, thank you for the report.

I confirmed that I can reproduce it. I'll investigate this.

[KaelWD]

Oh, you're actually a member of both. Nice. I guess I can close that PR after all.

[mysticatea]

Hmm, I'm suspecting a bug of Babylon (the upstream of babel-eslint). It expected require("babylon").tokTypes.prefix to match to ! and ~ tokens but not in fact.

EDIT: this is a bug of babel-eslint.