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Simplify isCommon and isCombo checks in mergeData.

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jdalton
2015-03-13 00:12:51 -07:00
parent 78d4812b0e
commit ac1e436339
1 changed files with 8 additions and 17 deletions
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25
lodash.src.js
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@@ -22,8 +22,8 @@
CURRY_RIGHT_FLAG = 16,
PARTIAL_FLAG = 32,
PARTIAL_RIGHT_FLAG = 64,
REARG_FLAG = 128,
ARY_FLAG = 256;
ARY_FLAG = 128,
REARG_FLAG = 256;
/** Used as default options for `_.trunc`. */
var DEFAULT_TRUNC_LENGTH = 30,
@@ -3997,22 +3997,13 @@
function mergeData(data, source) {
var bitmask = data[1],
srcBitmask = source[1],
newBitmask = bitmask | srcBitmask;
newBitmask = bitmask | srcBitmask,
isCommon = newBitmask < ARY_FLAG;
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),
argPos = (isRearg ? data : source)[7],
ary = (isAry ? data : source)[8];
var isCommon = !(bitmask >= REARG_FLAG && srcBitmask > bindFlags) &&
!(bitmask > bindFlags && srcBitmask >= REARG_FLAG);
var isCombo = (newBitmask >= arityFlags && newBitmask <= comboFlags) &&
(bitmask < REARG_FLAG || ((isRearg || isAry) && argPos.length <= ary));
var isCombo =
(srcBitmask == ARY_FLAG && bitmask == CURRY_FLAG) ||
(srcBitmask == ARY_FLAG && bitmask == REARG_FLAG && data[7].length <= source[8]) ||
(srcBitmask == (ARY_FLAG | REARG_FLAG) && bitmask == CURRY_FLAG);
// Exit early if metadata can't be merged.
if (!(isCommon || isCombo)) {