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'use strict';

var functionsHaveNames = function functionsHaveNames() {
	return typeof function f() {}.name === 'string';
};

var gOPD = Object.getOwnPropertyDescriptor;
if (gOPD) {
	try {
		gOPD([], 'length');
	} catch (e) {
		// IE 8 has a broken gOPD
		gOPD = null;
	}
}

functionsHaveNames.functionsHaveConfigurableNames = function functionsHaveConfigurableNames() {
	if (!functionsHaveNames() || !gOPD) {
		return false;
	}
	var desc = gOPD(function () {}, 'name');
	return !!desc && !!desc.configurable;
};

var $bind = Function.prototype.bind;

functionsHaveNames.boundFunctionsHaveNames = function boundFunctionsHaveNames() {
	return functionsHaveNames() && typeof $bind === 'function' && function f() {}.bind().name !== '';
};

module.exports = functionsHaveNames;