a.dist.js

"use strict";

function asyncGeneratorStep(gen, resolve, reject, _next, _throw, key, arg) { try { var info = gen[key](arg); var value = info.value; } catch (error) { reject(error); return; } if (info.done) { resolve(value); } else { Promise.resolve(value).then(_next, _throw); } }

function _asyncToGenerator(fn) { return function () { var self = this, args = arguments; return new Promise(function (resolve, reject) { var gen = fn.apply(self, args); function _next(value) { asyncGeneratorStep(gen, resolve, reject, _next, _throw, "next", value); } function _throw(err) { asyncGeneratorStep(gen, resolve, reject, _next, _throw, "throw", err); } _next(undefined); }); }; }

(function () {
  var _ref = _asyncToGenerator(
  /*#__PURE__*/
  regeneratorRuntime.mark(function _callee(p) {
    var r;
    return regeneratorRuntime.wrap(function _callee$(_context) {
      while (1) {
        switch (_context.prev = _context.next) {
          case 0:
            _context.next = 2;
            return p();

          case 2:
            r = _context.sent;
            return _context.abrupt("return", r);

          case 4:
          case "end":
            return _context.stop();
        }
      }
    }, _callee, this);
  }));

  return function (_x) {
    return _ref.apply(this, arguments);
  };
})()(function () {
  return Promise.resolve(1);
});

a.js

// @flow
(async p => {
  const r = await p();
  return r;
})(() => Promise.resolve(1));

b.dist.js

"use strict";

function asyncGeneratorStep(gen, resolve, reject, _next, _throw, key, arg) { try { var info = gen[key](arg); var value = info.value; } catch (error) { reject(error); return; } if (info.done) { resolve(value); } else { Promise.resolve(value).then(_next, _throw); } }

function _asyncToGenerator(fn) { return function () { var self = this, args = arguments; return new Promise(function (resolve, reject) { var gen = fn.apply(self, args); function _next(value) { asyncGeneratorStep(gen, resolve, reject, _next, _throw, "next", value); } function _throw(err) { asyncGeneratorStep(gen, resolve, reject, _next, _throw, "throw", err); } _next(undefined); }); }; }

(function () {
  var _ref = _asyncToGenerator(
  /*#__PURE__*/
  regeneratorRuntime.mark(function _callee(p) {
    var r1, r2;
    return regeneratorRuntime.wrap(function _callee$(_context) {
      while (1) {
        switch (_context.prev = _context.next) {
          case 0:
            _context.next = 2;
            return p();

          case 2:
            r1 = _context.sent;
            _context.next = 5;
            return p();

          case 5:
            r2 = _context.sent;
            return _context.abrupt("return", r1 + r2);

          case 7:
          case "end":
            return _context.stop();
        }
      }
    }, _callee, this);
  }));

  return function (_x) {
    return _ref.apply(this, arguments);
  };
})()(function () {
  return Promise.resolve(1);
});

b.js

// @flow
(async p => {
  const r1 = await p();
  const r2 = await p();
  return r1 + r2;
})(() => Promise.resolve(1));