Innovenergy_trunk/frontend/node_modules/get-func-name/index.js

45 lines
1.1 KiB
JavaScript

'use strict';
/* !
* Chai - getFuncName utility
* Copyright(c) 2012-2016 Jake Luer <jake@alogicalparadox.com>
* MIT Licensed
*/
/**
* ### .getFuncName(constructorFn)
*
* Returns the name of a function.
* When a non-function instance is passed, returns `null`.
* This also includes a polyfill function if `aFunc.name` is not defined.
*
* @name getFuncName
* @param {Function} funct
* @namespace Utils
* @api public
*/
var toString = Function.prototype.toString;
var functionNameMatch = /\s*function(?:\s|\s*\/\*[^(?:*\/)]+\*\/\s*)*([^\s\(\/]+)/;
function getFuncName(aFunc) {
if (typeof aFunc !== 'function') {
return null;
}
var name = '';
if (typeof Function.prototype.name === 'undefined' && typeof aFunc.name === 'undefined') {
// Here we run a polyfill if Function does not support the `name` property and if aFunc.name is not defined
var match = toString.call(aFunc).match(functionNameMatch);
if (match) {
name = match[1];
}
} else {
// If we've got a `name` property we just use it
name = aFunc.name;
}
return name;
}
module.exports = getFuncName;