1  var baseGetTag = require('./_baseGetTag'),
 2      isObject = require('./isObject');
 3  
 4  /** `Object#toString` result references. */
 5  var 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   */
27  function 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  
37  module.exports = isFunction;