.config/coc/extensions/node_modules/coc-prettier/node_modules/core-js/modules/esnext.async-iterator.flat-map.js

   1 'use strict';
   2 // https://github.com/tc39/proposal-iterator-helpers
   3 var $ = require('../internals/export');
   4 var call = require('../internals/function-call');
   5 var aCallable = require('../internals/a-callable');
   6 var anObject = require('../internals/an-object');
   7 var createAsyncIteratorProxy = require('../internals/async-iterator-create-proxy');
   8 var getAsyncIterator = require('../internals/get-async-iterator');
   9
  10 var AsyncIteratorProxy = createAsyncIteratorProxy(function (Promise) {
  11   var state = this;
  12   var mapper = state.mapper;
  13   var innerIterator;
  14
  15   return new Promise(function (resolve, reject) {
  16     var outerLoop = function () {
  17       try {
  18         Promise.resolve(anObject(call(state.next, state.iterator))).then(function (step) {
  19           try {
  20             if (anObject(step).done) {
  21               state.done = true;
  22               resolve({ done: true, value: undefined });
  23             } else {
  24               Promise.resolve(mapper(step.value)).then(function (mapped) {
  25                 try {
  26                   state.innerIterator = innerIterator = getAsyncIterator(mapped);
  27                   state.innerNext = aCallable(innerIterator.next);
  28                   return innerLoop();
  29                 } catch (error2) { reject(error2); }
  30               }, reject);
  31             }
  32           } catch (error1) { reject(error1); }
  33         }, reject);
  34       } catch (error) { reject(error); }
  35     };
  36
  37     var innerLoop = function () {
  38       if (innerIterator = state.innerIterator) {
  39         try {
  40           Promise.resolve(anObject(call(state.innerNext, innerIterator))).then(function (result) {
  41             try {
  42               if (anObject(result).done) {
  43                 state.innerIterator = state.innerNext = null;
  44                 outerLoop();
  45               } else resolve({ done: false, value: result.value });
  46             } catch (error1) { reject(error1); }
  47           }, reject);
  48         } catch (error) { reject(error); }
  49       } else outerLoop();
  50     };
  51
  52     innerLoop();
  53   });
  54 });
  55
  56 $({ target: 'AsyncIterator', proto: true, real: true }, {
  57   flatMap: function flatMap(mapper) {
  58     return new AsyncIteratorProxy({
  59       iterator: anObject(this),
  60       mapper: aCallable(mapper),
  61       innerIterator: null,
  62       innerNext: null
  63     });
  64   }
  65 });