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  1. 'use strict';
  2. var $TypeError = require('es-errors/type');
  3. var ArrayBufferByteLength = require('./ArrayBufferByteLength');
  4. var IsDetachedBuffer = require('./IsDetachedBuffer');
  5. var isTypedArray = require('is-typed-array');
  6. var typedArrayBuffer = require('typed-array-buffer');
  7. // https://262.ecma-international.org/15.0/#sec-maketypedarraywithbufferwitnessrecord
  8. module.exports = function MakeTypedArrayWithBufferWitnessRecord(obj, order) {
  9. if (!isTypedArray(obj)) {
  10. throw new $TypeError('Assertion failed: `obj` must be a Typed Array');
  11. }
  12. if (order !== 'SEQ-CST' && order !== 'UNORDERED') {
  13. throw new $TypeError('Assertion failed: `order` must be ~SEQ-CST~ or ~UNORDERED~');
  14. }
  15. var buffer = typedArrayBuffer(obj); // step 1
  16. var byteLength = IsDetachedBuffer(buffer) ? 'DETACHED' : ArrayBufferByteLength(buffer, order); // steps 2 - 3
  17. return { '[[Object]]': obj, '[[CachedBufferByteLength]]': byteLength }; // step 4
  18. };