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- 'use strict';
- var $TypeError = require('es-errors/type');
- var CompletionRecord = require('./CompletionRecord');
- var CreateIteratorResultObject = require('./CreateIteratorResultObject');
- var GeneratorValidate = require('./GeneratorValidate');
- var NormalCompletion = require('./NormalCompletion');
- var SLOT = require('internal-slot');
- // https://262.ecma-international.org/16.0/#sec-generatorresumeabrupt
- module.exports = function GeneratorResumeAbrupt(generator, abruptCompletion, generatorBrand) {
- if (
- !(abruptCompletion instanceof CompletionRecord)
- || (abruptCompletion.type() !== 'return' && abruptCompletion.type() !== 'throw')
- ) {
- throw new $TypeError('Assertion failed: abruptCompletion must be a `return` or `throw` Completion Record');
- }
- var state = GeneratorValidate(generator, generatorBrand); // step 1
- if (state === 'SUSPENDED-START') { // step 2
- SLOT.set(generator, '[[GeneratorState]]', 'COMPLETED'); // step 3.a
- SLOT.set(generator, '[[GeneratorContext]]', null); // step 3.b
- state = 'COMPLETED'; // step 3.c
- }
- var value = abruptCompletion.value();
- if (state === 'COMPLETED') { // step 3
- return CreateIteratorResultObject(value, true); // steps 3.a-b
- }
- if (state !== 'SUSPENDED-YIELD') {
- throw new $TypeError('Assertion failed: generator state is unexpected: ' + state); // step 4
- }
- if (abruptCompletion.type() === 'return') {
- // due to representing `GeneratorContext` as a function, we can't safely re-invoke it, so we can't support sending it a return completion
- return CreateIteratorResultObject(SLOT.get(generator, '[[CloseIfAbrupt]]')(NormalCompletion(abruptCompletion.value())), true);
- }
- var genContext = SLOT.get(generator, '[[GeneratorContext]]'); // step 5
- SLOT.set(generator, '[[GeneratorState]]', 'EXECUTING'); // step 8
- var result = genContext(value); // steps 6-7, 8-11
- return result; // step 12
- };
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