GeneratorResumeAbrupt.js 1.7 KB

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  1. 'use strict';
  2. var $TypeError = require('es-errors/type');
  3. var CompletionRecord = require('es-abstract/2024/CompletionRecord');
  4. var CreateIterResultObject = require('es-abstract/2024/CreateIterResultObject');
  5. var GeneratorValidate = require('./GeneratorValidate');
  6. var NormalCompletion = require('es-abstract/2024/NormalCompletion');
  7. var SLOT = require('internal-slot');
  8. module.exports = function GeneratorResumeAbrupt(generator, abruptCompletion, generatorBrand) {
  9. if (!(abruptCompletion instanceof CompletionRecord)) {
  10. throw new $TypeError('Assertion failed: abruptCompletion must be a Completion Record');
  11. }
  12. var state = GeneratorValidate(generator, generatorBrand); // step 1
  13. if (state === 'suspendedStart') { // step 2
  14. SLOT.set(generator, '[[GeneratorState]]', 'completed'); // step 3.a
  15. SLOT.set(generator, '[[GeneratorContext]]', null); // step 3.b
  16. state = 'completed'; // step 3.c
  17. }
  18. var value = abruptCompletion.value();
  19. if (state === 'completed') { // step 3
  20. return CreateIterResultObject(value, true); // steps 3.a-b
  21. }
  22. if (state !== 'suspendedYield') {
  23. throw new $TypeError('Assertion failed: generator state is unexpected: ' + state); // step 4
  24. }
  25. if (abruptCompletion.type() === 'return') {
  26. // due to representing `GeneratorContext` as a function, we can't safely re-invoke it, so we can't support sending it a return completion
  27. return CreateIterResultObject(SLOT.get(generator, '[[CloseIfAbrupt]]')(NormalCompletion(abruptCompletion.value())), true);
  28. }
  29. var genContext = SLOT.get(generator, '[[GeneratorContext]]'); // step 5
  30. SLOT.set(generator, '[[GeneratorState]]', 'executing'); // step 8
  31. var result = genContext(value); // steps 6-7, 8-11
  32. return result; // step 12
  33. };