1  /*!
 2   * depd
 3   * Copyright(c) 2015 Douglas Christopher Wilson
 4   * MIT Licensed
 5   */
 6  
 7  'use strict'
 8  
 9  /**
10   * Module exports.
11   * @public
12   */
13  
14  module.exports = depd
15  
16  /**
17   * Create deprecate for namespace in caller.
18   */
19  
20  function depd (namespace) {
21    if (!namespace) {
22      throw new TypeError('argument namespace is required')
23    }
24  
25    function deprecate (message) {
26      // no-op in browser
27    }
28  
29    deprecate._file = undefined
30    deprecate._ignored = true
31    deprecate._namespace = namespace
32    deprecate._traced = false
33    deprecate._warned = Object.create(null)
34  
35    deprecate.function = wrapfunction
36    deprecate.property = wrapproperty
37  
38    return deprecate
39  }
40  
41  /**
42   * Return a wrapped function in a deprecation message.
43   *
44   * This is a no-op version of the wrapper, which does nothing but call
45   * validation.
46   */
47  
48  function wrapfunction (fn, message) {
49    if (typeof fn !== 'function') {
50      throw new TypeError('argument fn must be a function')
51    }
52  
53    return fn
54  }
55  
56  /**
57   * Wrap property in a deprecation message.
58   *
59   * This is a no-op version of the wrapper, which does nothing but call
60   * validation.
61   */
62  
63  function wrapproperty (obj, prop, message) {
64    if (!obj || (typeof obj !== 'object' && typeof obj !== 'function')) {
65      throw new TypeError('argument obj must be object')
66    }
67  
68    var descriptor = Object.getOwnPropertyDescriptor(obj, prop)
69  
70    if (!descriptor) {
71      throw new TypeError('must call property on owner object')
72    }
73  
74    if (!descriptor.configurable) {
75      throw new TypeError('property must be configurable')
76    }
77  }