Bump to v4.1.0.

_createHybridWrapper.js

@@ -0,0 +1,84 @@
+var composeArgs = require('./_composeArgs'),
+    composeArgsRight = require('./_composeArgsRight'),
+    createCtorWrapper = require('./_createCtorWrapper'),
+    createRecurryWrapper = require('./_createRecurryWrapper'),
+    reorder = require('./_reorder'),
+    replaceHolders = require('./_replaceHolders');
+
+/** Used to compose bitmasks for wrapper metadata. */
+var BIND_FLAG = 1,
+    BIND_KEY_FLAG = 2,
+    CURRY_FLAG = 8,
+    CURRY_RIGHT_FLAG = 16,
+    ARY_FLAG = 128,
+    FLIP_FLAG = 512;
+
+/**
+ * Creates a function that wraps `func` to invoke it with optional `this`
+ * binding of `thisArg`, partial application, and currying.
+ *
+ * @private
+ * @param {Function|string} func The function or method name to wrap.
+ * @param {number} bitmask The bitmask of wrapper flags. See `createWrapper` for more details.
+ * @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} [partialsRight] The arguments to append to those provided to the new function.
+ * @param {Array} [holdersRight] The `partialsRight` 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 createHybridWrapper(func, bitmask, thisArg, partials, holders, partialsRight, holdersRight, argPos, ary, arity) {
+  var isAry = bitmask & ARY_FLAG,
+      isBind = bitmask & BIND_FLAG,
+      isBindKey = bitmask & BIND_KEY_FLAG,
+      isCurry = bitmask & CURRY_FLAG,
+      isCurryRight = bitmask & CURRY_RIGHT_FLAG,
+      isFlip = bitmask & FLIP_FLAG,
+      Ctor = isBindKey ? undefined : createCtorWrapper(func);
+
+  function wrapper() {
+    var length = arguments.length,
+        index = length,
+        args = Array(length);
+
+    while (index--) {
+      args[index] = arguments[index];
+    }
+    if (partials) {
+      args = composeArgs(args, partials, holders);
+    }
+    if (partialsRight) {
+      args = composeArgsRight(args, partialsRight, holdersRight);
+    }
+    if (isCurry || isCurryRight) {
+      var placeholder = wrapper.placeholder,
+          argsHolders = replaceHolders(args, placeholder);
+
+      length -= argsHolders.length;
+      if (length < arity) {
+        return createRecurryWrapper(func, bitmask, createHybridWrapper, placeholder, thisArg, args, argsHolders, argPos, ary, arity - length);
+      }
+    }
+    var thisBinding = isBind ? thisArg : this,
+        fn = isBindKey ? thisBinding[func] : func;
+
+    if (argPos) {
+      args = reorder(args, argPos);
+    } else if (isFlip && args.length > 1) {
+      args.reverse();
+    }
+    if (isAry && ary < args.length) {
+      args.length = ary;
+    }
+    if (this && this !== global && this instanceof wrapper) {
+      fn = Ctor || createCtorWrapper(fn);
+    }
+    return fn.apply(thisBinding, args);
+  }
+  return wrapper;
+}
+
+module.exports = createHybridWrapper;