25 lines
767 B
Plaintext
25 lines
767 B
Plaintext
'use strict';
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var $TypeError = require('es-errors/type');
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var SLOT = require('internal-slot');
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// https://262.ecma-international.org/16.0/#sec-generatorvalidate
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module.exports = function GeneratorValidate(generator, generatorBrand) {
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SLOT.assert(generator, '[[GeneratorState]]'); // step 1
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SLOT.assert(generator, '[[GeneratorBrand]]'); // step 2
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var brand = SLOT.get(generator, '[[GeneratorBrand]]');
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if (brand !== generatorBrand) {
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throw new $TypeError('Assertion failed: generator brand is unexpected: ' + brand);
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}
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SLOT.assert(generator, '[[GeneratorContext]]'); // step 4
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var state = SLOT.get(generator, '[[GeneratorState]]'); // step 5
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if (state === 'EXECUTING') {
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throw new $TypeError('generator is executing');
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}
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return state; // step 7
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};
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