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Use vars to store bitmask flags to improve readability.

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John-David Dalton
2014-01-15 23:46:05 -08:00
parent c6557e5078
commit 999dfb84ee
8 changed files with 448 additions and 412 deletions
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47
dist/lodash.underscore.js vendored
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@@ -18,6 +18,14 @@
/** Used by methods to exit iteration */
var breakIndicator = '__lodash_break_1335248838000__';
/** Used to compose bitmasks for `__bindData__` */
var BIND_FLAG = 1,
BIND_KEY_FLAG = 2,
CURRY_FLAG = 4,
CURRY_BOUND_FLAG = 8,
PARTIAL_FLAG = 16,
PARTIAL_RIGHT_FLAG = 32;
/** Used to match HTML entities and HTML characters */
var reEscapedHtml = /&(?:amp|lt|gt|quot|#x27);/g,
reUnescapedHtml = /[&<>"']/g;
@@ -509,10 +517,10 @@
thisArg = bindData[4],
arity = bindData[5];
var isBind = bitmask & 1,
isBindKey = bitmask & 2,
isCurry = bitmask & 4,
isCurryBound = bitmask & 8,
var isBind = bitmask & BIND_FLAG,
isBindKey = bitmask & BIND_KEY_FLAG,
isCurry = bitmask & CURRY_FLAG,
isCurryBound = bitmask & CURRY_BOUND_FLAG,
key = func;
function bound() {
@@ -527,8 +535,9 @@
push.apply(args, partialRightArgs);
}
if (isCurry && args.length < arity) {
bitmask |= 16 & ~32;
return baseCreateWrapper([func, (isCurryBound ? bitmask : bitmask & ~3), args, null, thisArg, arity]);
bitmask |= PARTIAL_FLAG;
bitmask &= ~PARTIAL_RIGHT_FLAG;
return baseCreateWrapper([func, (isCurryBound ? bitmask : bitmask & ~(BIND_FLAG | BIND_KEY_FLAG)), args, null, thisArg, arity]);
}
}
args || (args = arguments);
@@ -819,7 +828,7 @@
*
* @private
* @param {Function|string} func The function or method name to reference.
* @param {number} bitmask The bitmask of method flags to compose.
* @param {number} bitmask The bitmask of flags to compose.
* The bitmask may be composed of the following flags:
* 1 - `_.bind`
* 2 - `_.bindKey`
@@ -836,12 +845,12 @@
* @returns {Function} Returns the new function.
*/
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;
var isBind = bitmask & BIND_FLAG,
isBindKey = bitmask & BIND_KEY_FLAG,
isCurry = bitmask & CURRY_FLAG,
isCurryBound = bitmask & CURRY_BOUND_FLAG,
isPartial = bitmask & PARTIAL_FLAG,
isPartialRight = bitmask & PARTIAL_RIGHT_FLAG;
if (!isBindKey && !isFunction(func)) {
throw new TypeError;
@@ -855,7 +864,7 @@
isPartialRight = partialRightArgs = false;
}
// fast path for `_.bind`
var creater = (bitmask == 1 || bitmask === 17) ? baseBind : baseCreateWrapper;
var creater = (bitmask == BIND_FLAG || bitmask == (BIND_FLAG | PARTIAL_FLAG)) ? baseBind : baseCreateWrapper;
return creater([func, bitmask, partialArgs, partialRightArgs, thisArg, arity]);
}
@@ -3073,8 +3082,8 @@
*/
function bind(func, thisArg) {
return arguments.length > 2
? createWrapper(func, 17, slice(arguments, 2), null, thisArg)
: createWrapper(func, 1, null, null, thisArg);
? createWrapper(func, BIND_FLAG | PARTIAL_FLAG, slice(arguments, 2), null, thisArg)
: createWrapper(func, BIND_FLAG, null, null, thisArg);
}
/**
@@ -3110,7 +3119,7 @@
while (++index < length) {
var key = funcs[index];
object[key] = createWrapper(object[key], 1, null, null, object);
object[key] = createWrapper(object[key], BIND_FLAG, null, null, object);
}
return object;
}
@@ -3458,7 +3467,7 @@
* // => 'hi fred'
*/
function partial(func) {
return createWrapper(func, 16, slice(arguments, 1));
return createWrapper(func, PARTIAL_FLAG, slice(arguments, 1));
}
/**
@@ -3535,7 +3544,7 @@
* // => '<p>fred, barney, &amp; pebbles</p>'
*/
function wrap(value, wrapper) {
return createWrapper(wrapper, 16, [value]);
return createWrapper(wrapper, PARTIAL_FLAG, [value]);
}
/*--------------------------------------------------------------------------*/