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Allow metadata to be used for curried functions that have _.ary and or _.rearg applied.

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John-David Dalton
2014-12-06 10:48:48 -08:00
parent 3ea129b4f8
commit fdbec5b0d2
1 changed files with 43 additions and 18 deletions
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61
lodash.js
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@@ -17,9 +17,9 @@
/** Used to compose bitmasks for wrapper metadata. */
var BIND_FLAG = 1,
BIND_KEY_FLAG = 2,
CURRY_FLAG = 4,
CURRY_RIGHT_FLAG = 8,
CURRY_BOUND_FLAG = 16,
CURRY_BOUND_FLAG = 4,
CURRY_FLAG = 8,
CURRY_RIGHT_FLAG = 16,
PARTIAL_FLAG = 32,
PARTIAL_RIGHT_FLAG = 64,
ARY_FLAG = 128,
@@ -2970,8 +2970,8 @@
isBind = bitmask & BIND_FLAG,
isBindKey = bitmask & BIND_KEY_FLAG,
isCurry = bitmask & CURRY_FLAG,
isCurryRight = bitmask & CURRY_RIGHT_FLAG,
isCurryBound = bitmask & CURRY_BOUND_FLAG;
isCurryBound = bitmask & CURRY_BOUND_FLAG,
isCurryRight = bitmask & CURRY_RIGHT_FLAG;
var Ctor = !isBindKey && createCtorWrapper(func),
key = func;
@@ -2986,12 +2986,6 @@
while (index--) {
args[index] = arguments[index];
}
if (argPos) {
args = arrayReduceRight(argPos, reorder, args);
}
if (isAry && ary < length) {
args.length = ary;
}
if (partials) {
args = composeArgs(args, partials, holders);
}
@@ -3026,6 +3020,12 @@
if (isBindKey) {
func = thisBinding[key];
}
if (argPos) {
args = arrayReduceRight(argPos, reorder, args);
}
if (isAry && ary < args.length) {
args.length = ary;
}
return (this instanceof wrapper ? (Ctor || createCtorWrapper(func)) : func).apply(thisBinding, args);
}
return wrapper;
@@ -3100,9 +3100,9 @@
* The bitmask may be composed of the following flags:
* 1 - `_.bind`
* 2 - `_.bindKey`
* 4 - `_.curry`
* 8 - `_.curryRight`
* 16 - `_.curry` or `_.curryRight` of a bound function
* 4 - `_.curry` or `_.curryRight` of a bound function
* 8 - `_.curry`
* 16 - `_.curryRight`
* 32 - `_.partial`
* 64 - `_.partialRight`
* 128 - `_.ary`
@@ -3137,10 +3137,35 @@
var data = !isBindKey && getData(func),
newData = [func, bitmask, thisArg, partials, holders, partialsRight, holdersRight, argPos, arity, ary];
if (data && data !== true &&
!(bitmask > 127 && data[1] > 3) &&
!((bitmask > 3 && bitmask < 128) && data[1] > 127)) {
newData = mergeData(newData, data);
if (data && data !== true) {
var srcBitmask = data[1],
newBitmask = bitmask | srcBitmask;
var arityFlags = ARY_FLAG | REARG_FLAG,
bindFlags = BIND_FLAG | BIND_KEY_FLAG,
comboFlags = arityFlags | bindFlags | CURRY_BOUND_FLAG | CURRY_RIGHT_FLAG;
var isAry = bitmask & ARY_FLAG && !(srcBitmask & ARY_FLAG),
isRearg = bitmask & REARG_FLAG && !(srcBitmask & REARG_FLAG),
argPosValue = isRearg ? argPos : data[6],
aryValue = isAry ? ary : data[9];
var isCommon = !(bitmask >= ARY_FLAG && srcBitmask > bindFlags) &&
!(bitmask > bindFlags && srcBitmask >= ARY_FLAG);
var isCombo = (newBitmask >= arityFlags && newBitmask <= comboFlags) &&
(bitmask < ARY_FLAG || ((isRearg || isAry) && argPosValue.length <= aryValue));
// Metadata is used to reduce the number of wrapper functions around `func`.
// This is possible because methods like `_.bind`, `_.curry`, and `_.partial`
// may be applied regardless of order. Methods like `_.ary` and `_.rearg`
// augment arguments, making the order in which they are applied important,
// preventing their use with metadata. However, we make an exception for
// a safe common case where curried functions have `_.ary` and or `_.rearg`
// applied.
if (isCommon || isCombo) {
newData = mergeData(newData, data);
}
}
newData[8] = newData[8] == null
? (isBindKey ? 0 : newData[0].length)