"use strict";
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var getPrototypeOf = Object.getPrototypeOf
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, prototype = Object.prototype
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, objToString = prototype.toString
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, id = Object().toString();
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module.exports = function (value) {
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var proto, valueConstructor;
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if (!value || typeof value !== "object" || objToString.call(value) !== id) {
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return false;
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}
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proto = getPrototypeOf(value);
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if (proto === null) {
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valueConstructor = value.constructor;
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if (typeof valueConstructor !== "function") return true;
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return valueConstructor.prototype !== value;
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}
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return proto === prototype || getPrototypeOf(proto) === null;
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};
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