source: imaps-frontend/node_modules/es-iterator-helpers/aos/GeneratorValidate.js@ d565449

'use strict';

var $TypeError = require('es-errors/type');

var SLOT = require('internal-slot');

module.exports = function GeneratorValidate(generator, generatorBrand) {
        SLOT.assert(generator, '[[GeneratorState]]'); // step 1
        SLOT.assert(generator, '[[GeneratorBrand]]'); // step 2

        var brand = SLOT.get(generator, '[[GeneratorBrand]]');
        if (brand !== generatorBrand) {
                throw new $TypeError('Assertion failed: generator brand is unexpected: ' + brand);
        }
        SLOT.assert(generator, '[[GeneratorContext]]'); // step 4
        var state = SLOT.get(generator, '[[GeneratorState]]'); // step 5
        if (state === 'executing') {
                throw new $TypeError('generator is executing');
        }

        return state; // step 7
};