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node_modules/core-js/internals/async-iterator-map.js

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+'use strict';
+var call = require('../internals/function-call');
+var aCallable = require('../internals/a-callable');
+var anObject = require('../internals/an-object');
+var isObject = require('../internals/is-object');
+var getIteratorDirect = require('../internals/get-iterator-direct');
+var createAsyncIteratorProxy = require('../internals/async-iterator-create-proxy');
+var createIterResultObject = require('../internals/create-iter-result-object');
+var closeAsyncIteration = require('../internals/async-iterator-close');
+
+var AsyncIteratorProxy = createAsyncIteratorProxy(function (Promise) {
+  var state = this;
+  var iterator = state.iterator;
+  var mapper = state.mapper;
+
+  return new Promise(function (resolve, reject) {
+    var doneAndReject = function (error) {
+      state.done = true;
+      reject(error);
+    };
+
+    var ifAbruptCloseAsyncIterator = function (error) {
+      closeAsyncIteration(iterator, doneAndReject, error, doneAndReject);
+    };
+
+    Promise.resolve(anObject(call(state.next, iterator))).then(function (step) {
+      try {
+        if (anObject(step).done) {
+          state.done = true;
+          resolve(createIterResultObject(undefined, true));
+        } else {
+          var value = step.value;
+          try {
+            var result = mapper(value, state.counter++);
+
+            var handler = function (mapped) {
+              resolve(createIterResultObject(mapped, false));
+            };
+
+            if (isObject(result)) Promise.resolve(result).then(handler, ifAbruptCloseAsyncIterator);
+            else handler(result);
+          } catch (error2) { ifAbruptCloseAsyncIterator(error2); }
+        }
+      } catch (error) { doneAndReject(error); }
+    }, doneAndReject);
+  });
+});
+
+// `AsyncIterator.prototype.map` method
+// https://github.com/tc39/proposal-iterator-helpers
+module.exports = function map(mapper) {
+  anObject(this);
+  aCallable(mapper);
+  return new AsyncIteratorProxy(getIteratorDirect(this), {
+    mapper: mapper
+  });
+};