1  var createWrap = require('./_createWrap');
 2  
 3  /** Used to compose bitmasks for function metadata. */
 4  var WRAP_CURRY_FLAG = 8;
 5  
 6  /**
 7   * Creates a function that accepts arguments of `func` and either invokes
 8   * `func` returning its result, if at least `arity` number of arguments have
 9   * been provided, or returns a function that accepts the remaining `func`
10   * arguments, and so on. The arity of `func` may be specified if `func.length`
11   * is not sufficient.
12   *
13   * The `_.curry.placeholder` value, which defaults to `_` in monolithic builds,
14   * may be used as a placeholder for provided arguments.
15   *
16   * **Note:** This method doesn't set the "length" property of curried functions.
17   *
18   * @static
19   * @memberOf _
20   * @since 2.0.0
21   * @category Function
22   * @param {Function} func The function to curry.
23   * @param {number} [arity=func.length] The arity of `func`.
24   * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
25   * @returns {Function} Returns the new curried function.
26   * @example
27   *
28   * var abc = function(a, b, c) {
29   *   return [a, b, c];
30   * };
31   *
32   * var curried = _.curry(abc);
33   *
34   * curried(1)(2)(3);
35   * // => [1, 2, 3]
36   *
37   * curried(1, 2)(3);
38   * // => [1, 2, 3]
39   *
40   * curried(1, 2, 3);
41   * // => [1, 2, 3]
42   *
43   * // Curried with placeholders.
44   * curried(1)(_, 3)(2);
45   * // => [1, 2, 3]
46   */
47  function curry(func, arity, guard) {
48    arity = guard ? undefined : arity;
49    var result = createWrap(func, WRAP_CURRY_FLAG, undefined, undefined, undefined, undefined, undefined, arity);
50    result.placeholder = curry.placeholder;
51    return result;
52  }
53  
54  // Assign default placeholders.
55  curry.placeholder = {};
56  
57  module.exports = curry;