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node_modules/core-js/modules/esnext.async-iterator.take.js

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+'use strict';
+var $ = require('../internals/export');
+var call = require('../internals/function-call');
+var anObject = require('../internals/an-object');
+var getIteratorDirect = require('../internals/get-iterator-direct');
+var notANaN = require('../internals/not-a-nan');
+var toPositiveInteger = require('../internals/to-positive-integer');
+var createAsyncIteratorProxy = require('../internals/async-iterator-create-proxy');
+var createIterResultObject = require('../internals/create-iter-result-object');
+var IS_PURE = require('../internals/is-pure');
+
+var AsyncIteratorProxy = createAsyncIteratorProxy(function (Promise) {
+  var state = this;
+  var iterator = state.iterator;
+  var returnMethod;
+
+  if (!state.remaining--) {
+    var resultDone = createIterResultObject(undefined, true);
+    state.done = true;
+    returnMethod = iterator['return'];
+    if (returnMethod !== undefined) {
+      return Promise.resolve(call(returnMethod, iterator, undefined)).then(function () {
+        return resultDone;
+      });
+    }
+    return resultDone;
+  } return Promise.resolve(call(state.next, iterator)).then(function (step) {
+    if (anObject(step).done) {
+      state.done = true;
+      return createIterResultObject(undefined, true);
+    } return createIterResultObject(step.value, false);
+  }).then(null, function (error) {
+    state.done = true;
+    throw error;
+  });
+});
+
+// `AsyncIterator.prototype.take` method
+// https://github.com/tc39/proposal-async-iterator-helpers
+$({ target: 'AsyncIterator', proto: true, real: true, forced: IS_PURE }, {
+  take: function take(limit) {
+    anObject(this);
+    var remaining = toPositiveInteger(notANaN(+limit));
+    return new AsyncIteratorProxy(getIteratorDirect(this), {
+      remaining: remaining
+    });
+  }
+});