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Rename createBound to createWrapper and break createWrapper apart.

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This commit is contained in:
John-David Dalton
2013-10-29 23:58:16 -07:00
parent e019441ede
commit 852b324819
7 changed files with 430 additions and 332 deletions
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145
lodash.js
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@@ -528,6 +528,10 @@
splice = arrayRef.splice,
unshift = arrayRef.unshift;
/** Used to detect `setImmediate` in Node.js */
var setImmediate = typeof (setImmediate = freeGlobal && moduleExports && freeGlobal.setImmediate) == 'function' &&
!reNative.test(setImmediate) && setImmediate;
/** Used to set meta data */
var defineProperty = (function() {
// IE 8 only accepts DOM elements
@@ -550,10 +554,6 @@
nativeParseInt = context.parseInt,
nativeRandom = Math.random;
/** Used to detect `setImmediate` in Node.js */
var isV8 = nativeCreate && !/\n/.test(nativeCreate) && !reNative.test(context.attachEvent),
setImmediate = typeof (setImmediate = isV8 && moduleExports && context.setImmediate) == 'function' && setImmediate;
/** Used to lookup a built-in constructor by [[Class]] */
var ctorByClass = {};
ctorByClass[arrayClass] = Array;
@@ -995,16 +995,18 @@
/*--------------------------------------------------------------------------*/
/**
* The base implementation of `_.bind` without `func` type checking or support
* for setting meta data.
* The base implementation of `_.bind` that creates the bound function and
* sets its meta data.
*
* @private
* @param {Function} func The function to bind.
* @param {*} [thisArg] The `this` binding of `func`.
* @param {Array} [partialArgs] An array of arguments to be partially applied.
* @param {Array} bindData The bind data array.
* @returns {Function} Returns the new bound function.
*/
function baseBind(func, thisArg, partialArgs) {
function baseBind(bindData) {
var func = bindData[0],
partialArgs = bindData[2],
thisArg = bindData[4];
function bound() {
// `Function#bind` spec
// http://es5.github.io/#x15.3.4.5
@@ -1022,6 +1024,7 @@
}
return func.apply(thisArg, args || arguments);
}
setBindData(bound, bindData);
return bound;
}
@@ -1197,6 +1200,61 @@
return bind(func, thisArg);
}
/**
* The base implementation of `createWrapper` that creates the wrapper and
* sets its meta data.
*
* @private
* @param {Array} bindData The bind data array.
* @returns {Function} Returns the new function.
*/
function baseCreateWrapper(bindData) {
var func = bindData[0],
bitmask = bindData[1],
partialArgs = bindData[2],
partialRightArgs = bindData[3],
thisArg = bindData[4],
arity = bindData[5];
var isBind = bitmask & 1,
isBindKey = bitmask & 2,
isCurry = bitmask & 4,
isCurryBound = bitmask & 8,
key = func;
function bound() {
var thisBinding = isBind ? thisArg : this;
if (isCurry || partialArgs || partialRightArgs) {
if (partialArgs) {
var args = partialArgs.slice();
push.apply(args, arguments);
}
if (partialRightArgs || isCurry) {
args || (args = slice(arguments));
if (partialRightArgs) {
push.apply(args, partialRightArgs);
}
if (isCurry && args.length < arity) {
bitmask |= 16 & ~32;
return baseCreateWrapper([func, (isCurryBound ? bitmask : bitmask & ~3), args, null, thisArg, arity]);
}
}
}
args || (args = arguments);
if (isBindKey) {
func = thisBinding[key];
}
if (this instanceof bound) {
thisBinding = baseCreate(func.prototype);
var result = func.apply(thisBinding, args);
return isObject(result) ? result : thisBinding;
}
return func.apply(thisBinding, args);
}
setBindData(bound, bindData);
return bound;
}
/**
* The base implementation of `_.flatten` without support for callback
* shorthands or `thisArg` binding.
@@ -1588,16 +1646,15 @@
* provided to the new function.
* @param {*} [thisArg] The `this` binding of `func`.
* @param {number} [arity] The arity of `func`.
* @returns {Function} Returns the new bound function.
* @returns {Function} Returns the new function.
*/
function createBound(func, bitmask, partialArgs, partialRightArgs, thisArg, arity) {
function createWrapper(func, bitmask, partialArgs, partialRightArgs, thisArg, arity) {
var isBind = bitmask & 1,
isBindKey = bitmask & 2,
isCurry = bitmask & 4,
isCurryBound = bitmask & 8,
isPartial = bitmask & 16,
isPartialRight = bitmask & 32,
key = func;
isPartialRight = bitmask & 32;
if (!isBindKey && !isFunction(func)) {
throw new TypeError;
@@ -1636,45 +1693,11 @@
}
// merge flags
bindData[1] |= bitmask;
return createBound.apply(null, bindData);
return createWrapper.apply(null, bindData);
}
// fast path for `_.bind`
if (bitmask == 1 || bitmask === 17) {
var bound = baseBind(func, thisArg, partialArgs);
}
else {
bound = function() {
var thisBinding = isBind ? thisArg : this;
if (isCurry || isPartial || isPartialRight) {
if (isPartial) {
var args = partialArgs.slice();
push.apply(args, arguments);
}
if (isPartialRight || isCurry) {
args || (args = slice(arguments));
if (isPartialRight) {
push.apply(args, partialRightArgs);
}
if (isCurry && args.length < arity) {
bitmask |= 16 & ~32;
return createBound(func, (isCurryBound ? bitmask : bitmask & ~3), args, null, thisArg, arity);
}
}
}
args || (args = arguments);
if (isBindKey) {
func = thisBinding[key];
}
if (this instanceof bound) {
thisBinding = baseCreate(func.prototype);
var result = func.apply(thisBinding, args);
return isObject(result) ? result : thisBinding;
}
return func.apply(thisBinding, args);
};
}
setBindData(bound, [func, bitmask, partialArgs, partialRightArgs, thisArg, arity]);
return bound;
var creater = (bitmask == 1 || bitmask === 17) ? baseBind : baseCreateWrapper;
return creater([func, bitmask, partialArgs, partialRightArgs, thisArg, arity]);
}
/**
@@ -1755,7 +1778,7 @@
*
* @private
* @param {Function} func The function to set data on.
* @param {*} value The value to set.
* @param {Array} value The data array to set.
*/
var setBindData = !defineProperty ? noop : function(func, value) {
descriptor.value = value;
@@ -5372,8 +5395,8 @@
*/
function bind(func, thisArg) {
return arguments.length > 2
? createBound(func, 17, slice(arguments, 2), null, thisArg)
: createBound(func, 1, null, null, thisArg);
? createWrapper(func, 17, slice(arguments, 2), null, thisArg)
: createWrapper(func, 1, null, null, thisArg);
}
/**
@@ -5407,7 +5430,7 @@
while (++index < length) {
var key = funcs[index];
object[key] = createBound(object[key], 1, null, null, object);
object[key] = createWrapper(object[key], 1, null, null, object);
}
return object;
}
@@ -5448,8 +5471,8 @@
*/
function bindKey(object, key) {
return arguments.length > 2
? createBound(key, 19, slice(arguments, 2), null, object)
: createBound(key, 3, null, null, object);
? createWrapper(key, 19, slice(arguments, 2), null, object)
: createWrapper(key, 3, null, null, object);
}
/**
@@ -5600,7 +5623,7 @@
*/
function curry(func, arity) {
arity = typeof arity == 'number' ? arity : (+arity || func.length);
return createBound(func, 4, null, null, null, arity);
return createWrapper(func, 4, null, null, null, arity);
}
/**
@@ -5894,7 +5917,7 @@
* // => 'hi fred'
*/
function partial(func) {
return createBound(func, 16, slice(arguments, 1));
return createWrapper(func, 16, slice(arguments, 1));
}
/**
@@ -5925,7 +5948,7 @@
* // => { '_': _, 'jq': $ }
*/
function partialRight(func) {
return createBound(func, 32, null, slice(arguments, 1));
return createWrapper(func, 32, null, slice(arguments, 1));
}
/**
@@ -6001,7 +6024,7 @@
* // => '<p>Fred, Wilma, &amp; Pebbles</p>'
*/
function wrap(value, wrapper) {
return createBound(wrapper, 16, [value]);
return createWrapper(wrapper, 16, [value]);
}
/*--------------------------------------------------------------------------*/