Bump to v4.1.0.

_createRecurryWrapper.js

@@ -0,0 +1,53 @@
+var copyArray = require('./_copyArray'),
+    isLaziable = require('./_isLaziable'),
+    setData = require('./_setData');
+
+/** Used to compose bitmasks for wrapper metadata. */
+var BIND_FLAG = 1,
+    BIND_KEY_FLAG = 2,
+    CURRY_BOUND_FLAG = 4,
+    CURRY_FLAG = 8,
+    PARTIAL_FLAG = 32,
+    PARTIAL_RIGHT_FLAG = 64;
+
+/**
+ * Creates a function that wraps `func` to continue currying.
+ *
+ * @private
+ * @param {Function} func The function to wrap.
+ * @param {number} bitmask The bitmask of wrapper flags. See `createWrapper` for more details.
+ * @param {Function} wrapFunc The function to create the `func` wrapper.
+ * @param {*} placeholder The placeholder to replace.
+ * @param {*} [thisArg] The `this` binding of `func`.
+ * @param {Array} [partials] The arguments to prepend to those provided to the new function.
+ * @param {Array} [holders] The `partials` placeholder indexes.
+ * @param {Array} [argPos] The argument positions of the new function.
+ * @param {number} [ary] The arity cap of `func`.
+ * @param {number} [arity] The arity of `func`.
+ * @returns {Function} Returns the new wrapped function.
+ */
+function createRecurryWrapper(func, bitmask, wrapFunc, placeholder, thisArg, partials, holders, argPos, ary, arity) {
+  var isCurry = bitmask & CURRY_FLAG,
+      newArgPos = argPos ? copyArray(argPos) : undefined,
+      newsHolders = isCurry ? holders : undefined,
+      newHoldersRight = isCurry ? undefined : holders,
+      newPartials = isCurry ? partials : undefined,
+      newPartialsRight = isCurry ? undefined : partials;
+
+  bitmask |= (isCurry ? PARTIAL_FLAG : PARTIAL_RIGHT_FLAG);
+  bitmask &= ~(isCurry ? PARTIAL_RIGHT_FLAG : PARTIAL_FLAG);
+
+  if (!(bitmask & CURRY_BOUND_FLAG)) {
+    bitmask &= ~(BIND_FLAG | BIND_KEY_FLAG);
+  }
+  var newData = [func, bitmask, thisArg, newPartials, newsHolders, newPartialsRight, newHoldersRight, newArgPos, ary, arity],
+      result = wrapFunc.apply(undefined, newData);
+
+  if (isLaziable(func)) {
+    setData(result, newData);
+  }
+  result.placeholder = placeholder;
+  return result;
+}
+
+module.exports = createRecurryWrapper;