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'use strict';
var ArraySpeciesCreate = require('es-abstract/2021/ArraySpeciesCreate');
var FlattenIntoArray = require('es-abstract/2021/FlattenIntoArray');
var Get = require('es-abstract/2021/Get');
var ToIntegerOrInfinity = require('es-abstract/2021/ToIntegerOrInfinity');
var ToLength = require('es-abstract/2021/ToLength');
var ToObject = require('es-abstract/2021/ToObject');
module.exports = function flat() {
var O = ToObject(this);
var sourceLen = ToLength(Get(O, 'length'));
var depthNum = 1;
if (arguments.length > 0 && typeof arguments[0] !== 'undefined') {
depthNum = ToIntegerOrInfinity(arguments[0]);
}
var A = ArraySpeciesCreate(O, 0);
FlattenIntoArray(A, O, sourceLen, 0, depthNum);
return A;
};