remove usage of @@species pattern from %TypedArray% and ArrayBuffer methods

tc39/ecma262#3450

Author: zloirock

CHANGELOG.md

@@ -30,6 +30,14 @@
   - Moved to stage 3, [October 2024 TC39 meeting](https://x.com/robpalmer2/status/1843829675036160179)
   - Added `/actual/` namespace entries, unconditional forced replacement changed to feature detection
 - [Extractors proposal](https://github.com/tc39/proposal-extractors) moved to stage 2, [October 2024 TC39 meeting](https://github.com/tc39/proposals/commit/11bc489049fc5ce59b21e98a670a84f153a29a80)
+- Usage of `@@species` pattern removed from `%TypedArray%` and `ArrayBuffer` methods, [tc39/ecma262/3450](https://github.com/tc39/ecma262/pull/3450):
+  - Built-ins:
+    - `%TypedArray%.prototype.filter`
+    - `%TypedArray%.prototype.filterReject`
+    - `%TypedArray%.prototype.map`
+    - `%TypedArray%.prototype.slice`
+    - `%TypedArray%.prototype.subarray`
+    - `ArrayBuffer.prototype.slice`
 - Compat data improvements:
   - [`JSON.parse` source text access proposal](https://github.com/tc39/proposal-json-parse-with-source) features marked as [shipped from FF132](https://bugzilla.mozilla.org/show_bug.cgi?id=1913085)
   - [`Uint8Array` to / from base64 and hex proposal](https://github.com/tc39/proposal-arraybuffer-base64) methods marked as [shipped from FF133](https://bugzilla.mozilla.org/show_bug.cgi?id=1917885#c9)

packages/core-js/internals/typed-array-from-same-type-and-list.js

@@ -0,0 +1,7 @@
+'use strict';
+var arrayFromConstructorAndList = require('../internals/array-from-constructor-and-list');
+var getTypedArrayConstructor = require('../internals/array-buffer-view-core').getTypedArrayConstructor;
+
+module.exports = function (instance, list) {
+  return arrayFromConstructorAndList(getTypedArrayConstructor(instance), list);
+};

packages/core-js/internals/typed-array-from-species-and-list.js

@@ -6,7 +6,6 @@ var ArrayBufferModule = require('../internals/array-buffer');
 var anObject = require('../internals/an-object');
 var toAbsoluteIndex = require('../internals/to-absolute-index');
 var toLength = require('../internals/to-length');
-var speciesConstructor = require('../internals/species-constructor');
 
 var ArrayBuffer = ArrayBufferModule.ArrayBuffer;
 var DataView = ArrayBufferModule.DataView;
@@ -29,7 +28,7 @@ $({ target: 'ArrayBuffer', proto: true, unsafe: true, forced: INCORRECT_SLICE },
     var length = anObject(this).byteLength;
     var first = toAbsoluteIndex(start, length);
     var fin = toAbsoluteIndex(end === undefined ? length : end, length);
-    var result = new (speciesConstructor(this, ArrayBuffer))(toLength(fin - first));
+    var result = new ArrayBuffer(toLength(fin - first));
     var viewSource = new DataView(this);
     var viewTarget = new DataView(result);
     var index = 0;

packages/core-js/internals/typed-array-species-constructor.js

@@ -1,7 +1,7 @@
 'use strict';
 var ArrayBufferViewCore = require('../internals/array-buffer-view-core');
 var $filter = require('../internals/array-iteration').filter;
-var fromSpeciesAndList = require('../internals/typed-array-from-species-and-list');
+var fromSameTypeAndList = require('../internals/typed-array-from-same-type-and-list');
 
 var aTypedArray = ArrayBufferViewCore.aTypedArray;
 var exportTypedArrayMethod = ArrayBufferViewCore.exportTypedArrayMethod;
@@ -10,5 +10,5 @@ var exportTypedArrayMethod = ArrayBufferViewCore.exportTypedArrayMethod;
 // https://tc39.es/ecma262/#sec-%typedarray%.prototype.filter
 exportTypedArrayMethod('filter', function filter(callbackfn /* , thisArg */) {
   var list = $filter(aTypedArray(this), callbackfn, arguments.length > 1 ? arguments[1] : undefined);
-  return fromSpeciesAndList(this, list);
+  return fromSameTypeAndList(this, list);
 });

packages/core-js/modules/es.array-buffer.slice.js

@@ -1,15 +1,15 @@
 'use strict';
 var ArrayBufferViewCore = require('../internals/array-buffer-view-core');
 var $map = require('../internals/array-iteration').map;
-var typedArraySpeciesConstructor = require('../internals/typed-array-species-constructor');
 
 var aTypedArray = ArrayBufferViewCore.aTypedArray;
+var getTypedArrayConstructor = ArrayBufferViewCore.getTypedArrayConstructor;
 var exportTypedArrayMethod = ArrayBufferViewCore.exportTypedArrayMethod;
 
 // `%TypedArray%.prototype.map` method
 // https://tc39.es/ecma262/#sec-%typedarray%.prototype.map
 exportTypedArrayMethod('map', function map(mapfn /* , thisArg */) {
   return $map(aTypedArray(this), mapfn, arguments.length > 1 ? arguments[1] : undefined, function (O, length) {
-    return new (typedArraySpeciesConstructor(O))(length);
+    return new (getTypedArrayConstructor(O))(length);
   });
 });

packages/core-js/modules/es.typed-array.filter.js

@@ -1,10 +1,10 @@
 'use strict';
 var ArrayBufferViewCore = require('../internals/array-buffer-view-core');
-var typedArraySpeciesConstructor = require('../internals/typed-array-species-constructor');
 var fails = require('../internals/fails');
 var arraySlice = require('../internals/array-slice');
 
 var aTypedArray = ArrayBufferViewCore.aTypedArray;
+var getTypedArrayConstructor = ArrayBufferViewCore.getTypedArrayConstructor;
 var exportTypedArrayMethod = ArrayBufferViewCore.exportTypedArrayMethod;
 
 var FORCED = fails(function () {
@@ -16,7 +16,7 @@ var FORCED = fails(function () {
 // https://tc39.es/ecma262/#sec-%typedarray%.prototype.slice
 exportTypedArrayMethod('slice', function slice(start, end) {
   var list = arraySlice(aTypedArray(this), start, end);
-  var C = typedArraySpeciesConstructor(this);
+  var C = getTypedArrayConstructor(this);
   var index = 0;
   var length = list.length;
   var result = new C(length);

packages/core-js/modules/es.typed-array.map.js

@@ -2,9 +2,9 @@
 var ArrayBufferViewCore = require('../internals/array-buffer-view-core');
 var toLength = require('../internals/to-length');
 var toAbsoluteIndex = require('../internals/to-absolute-index');
-var typedArraySpeciesConstructor = require('../internals/typed-array-species-constructor');
 
 var aTypedArray = ArrayBufferViewCore.aTypedArray;
+var getTypedArrayConstructor = ArrayBufferViewCore.getTypedArrayConstructor;
 var exportTypedArrayMethod = ArrayBufferViewCore.exportTypedArrayMethod;
 
 // `%TypedArray%.prototype.subarray` method
@@ -13,7 +13,7 @@ exportTypedArrayMethod('subarray', function subarray(begin, end) {
   var O = aTypedArray(this);
   var length = O.length;
   var beginIndex = toAbsoluteIndex(begin, length);
-  var C = typedArraySpeciesConstructor(O);
+  var C = getTypedArrayConstructor(O);
   return new C(
     O.buffer,
     O.byteOffset + beginIndex * O.BYTES_PER_ELEMENT,

packages/core-js/modules/es.typed-array.slice.js

@@ -2,7 +2,7 @@
 // TODO: Remove from `core-js@4`
 var ArrayBufferViewCore = require('../internals/array-buffer-view-core');
 var $filterReject = require('../internals/array-iteration').filterReject;
-var fromSpeciesAndList = require('../internals/typed-array-from-species-and-list');
+var fromSameTypeAndList = require('../internals/typed-array-from-same-type-and-list');
 
 var aTypedArray = ArrayBufferViewCore.aTypedArray;
 var exportTypedArrayMethod = ArrayBufferViewCore.exportTypedArrayMethod;
@@ -11,5 +11,5 @@ var exportTypedArrayMethod = ArrayBufferViewCore.exportTypedArrayMethod;
 // https://github.com/tc39/proposal-array-filtering
 exportTypedArrayMethod('filterOut', function filterOut(callbackfn /* , thisArg */) {
   var list = $filterReject(aTypedArray(this), callbackfn, arguments.length > 1 ? arguments[1] : undefined);
-  return fromSpeciesAndList(this, list);
+  return fromSameTypeAndList(this, list);
 }, true);

packages/core-js/modules/es.typed-array.subarray.js

@@ -1,7 +1,7 @@
 'use strict';
 var ArrayBufferViewCore = require('../internals/array-buffer-view-core');
 var $filterReject = require('../internals/array-iteration').filterReject;
-var fromSpeciesAndList = require('../internals/typed-array-from-species-and-list');
+var fromSameTypeAndList = require('../internals/typed-array-from-same-type-and-list');
 
 var aTypedArray = ArrayBufferViewCore.aTypedArray;
 var exportTypedArrayMethod = ArrayBufferViewCore.exportTypedArrayMethod;
@@ -10,5 +10,5 @@ var exportTypedArrayMethod = ArrayBufferViewCore.exportTypedArrayMethod;
 // https://github.com/tc39/proposal-array-filtering
 exportTypedArrayMethod('filterReject', function filterReject(callbackfn /* , thisArg */) {
   var list = $filterReject(aTypedArray(this), callbackfn, arguments.length > 1 ? arguments[1] : undefined);
-  return fromSpeciesAndList(this, list);
+  return fromSameTypeAndList(this, list);
 }, true);

packages/core-js/modules/esnext.typed-array.filter-out.js

@@ -2,14 +2,14 @@
 // TODO: Remove from `core-js@4`
 var ArrayBufferViewCore = require('../internals/array-buffer-view-core');
 var $group = require('../internals/array-group');
-var typedArraySpeciesConstructor = require('../internals/typed-array-species-constructor');
 
 var aTypedArray = ArrayBufferViewCore.aTypedArray;
+var getTypedArrayConstructor = ArrayBufferViewCore.getTypedArrayConstructor;
 var exportTypedArrayMethod = ArrayBufferViewCore.exportTypedArrayMethod;
 
 // `%TypedArray%.prototype.groupBy` method
 // https://github.com/tc39/proposal-array-grouping
 exportTypedArrayMethod('groupBy', function groupBy(callbackfn /* , thisArg */) {
   var thisArg = arguments.length > 1 ? arguments[1] : undefined;
-  return $group(aTypedArray(this), callbackfn, thisArg, typedArraySpeciesConstructor);
+  return $group(aTypedArray(this), callbackfn, thisArg, getTypedArrayConstructor);
 }, true);