1var baseGetTag = require('./_baseGetTag'),
2    isObject = require('./isObject');
3
4/** `Object#toString` result references. */
5var asyncTag = '[object AsyncFunction]',
6    funcTag = '[object Function]',
7    genTag = '[object GeneratorFunction]',
8    proxyTag = '[object Proxy]';
9
10/**
11 * Checks if `value` is classified as a `Function` object.
12 *
13 * @static
14 * @memberOf _
15 * @since 0.1.0
16 * @category Lang
17 * @param {*} value The value to check.
18 * @returns {boolean} Returns `true` if `value` is a function, else `false`.
19 * @example
20 *
21 * _.isFunction(_);
22 * // => true
23 *
24 * _.isFunction(/abc/);
25 * // => false
26 */
27function isFunction(value) {
28  if (!isObject(value)) {
29    return false;
30  }
31  // The use of `Object#toString` avoids issues with the `typeof` operator
32  // in Safari 9 which returns 'object' for typed arrays and other constructors.
33  var tag = baseGetTag(value);
34  return tag == funcTag || tag == genTag || tag == asyncTag || tag == proxyTag;
35}
36
37module.exports = isFunction;
38