motion/node_modules/flint-babel-core/lib/transformation/helpers/remap-async-to-generator.js

motion - moving development forward

"use strict";

exports.__esModule = true;
// istanbul ignore next

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)) newObj[key] = obj[key]; } } newObj["default"] = obj; return newObj; } }

var _types = require("../../types");

var t = _interopRequireWildcard(_types);

/**
 * [Please add a description.]
 */

var awaitVisitor = {

  /**
   * [Please add a description.]
   */

  Function: function Function() {
    this.skip();
  },

  /**
   * [Please add a description.]
   */

  AwaitExpression: function AwaitExpression(node) {
    node.type = "YieldExpression";

    if (node.all) {
      // await* foo; -> yield Promise.all(foo);
      node.all = false;
      node.argument = t.callExpression(t.memberExpression(t.identifier("Promise"), t.identifier("all")), [node.argument]);
    }
  }
};

/**
 * [Please add a description.]
 */

var referenceVisitor = {

  /**
   * [Please add a description.]
   */

  ReferencedIdentifier: function ReferencedIdentifier(node, parent, scope, state) {
    var name = state.id.name;
    if (node.name === name && scope.bindingIdentifierEquals(name, state.id)) {
      return state.ref = state.ref || scope.generateUidIdentifier(name);
    }
  }
};

/**
 * [Please add a description.]
 */

exports["default"] = function (path, callId) {
  var node = path.node;

  node.async = false;
  node.generator = true;

  path.traverse(awaitVisitor, state);

  var call = t.callExpression(callId, [node]);

  var id = node.id;
  node.id = null;

  if (t.isFunctionDeclaration(node)) {
    var declar = t.variableDeclaration("let", [t.variableDeclarator(id, call)]);
    declar._blockHoist = true;
    return declar;
  } else {
    if (id) {
      var state = { id: id };
      path.traverse(referenceVisitor, state);

      if (state.ref) {
        path.scope.parent.push({ id: state.ref });
        return t.assignmentExpression("=", state.ref, call);
      }
    }

    return call;
  }
};

module.exports = exports["default"];