index.js

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = annotateAsPure;

function t() {
  const data = _interopRequireWildcard(require("@babel/types"));

  t = function () {
    return data;
  };

  return data;
}

function _interopRequireWildcard(obj) { if (obj && obj.__esModule) { return obj; } else { var newObj = {}; if (obj != null) { for (var key in obj) { if (Object.prototype.hasOwnProperty.call(obj, key)) { var desc = Object.defineProperty && Object.getOwnPropertyDescriptor ? Object.getOwnPropertyDescriptor(obj, key) : {}; if (desc.get || desc.set) { Object.defineProperty(newObj, key, desc); } else { newObj[key] = obj[key]; } } } } newObj.default = obj; return newObj; } }

const PURE_ANNOTATION = "#__PURE__";

const isPureAnnotated = ({
  leadingComments
}) => !!leadingComments && leadingComments.some(comment => /[@#]__PURE__/.test(comment.value));

function annotateAsPure(pathOrNode) {
  const node = pathOrNode.node || pathOrNode;

  if (isPureAnnotated(node)) {
    return;
  }

  t().addComment(node, "leading", PURE_ANNOTATION);
}