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author | Florian Dold <florian.dold@gmail.com> | 2016-11-03 01:33:53 +0100 |
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committer | Florian Dold <florian.dold@gmail.com> | 2016-11-03 01:33:53 +0100 |
commit | d1291f67551c58168af43698a359cb5ddfd266b0 (patch) | |
tree | 55a13ed29fe1915e3f42f1b1b7038dafa2e975a7 /node_modules/lodash/_createFlow.js | |
parent | d0a0695fb5d34996850723f7d4b1b59c3df909c2 (diff) | |
download | wallet-core-d1291f67551c58168af43698a359cb5ddfd266b0.tar.xz |
node_modules
Diffstat (limited to 'node_modules/lodash/_createFlow.js')
-rw-r--r-- | node_modules/lodash/_createFlow.js | 82 |
1 files changed, 82 insertions, 0 deletions
diff --git a/node_modules/lodash/_createFlow.js b/node_modules/lodash/_createFlow.js new file mode 100644 index 000000000..b70d1df69 --- /dev/null +++ b/node_modules/lodash/_createFlow.js @@ -0,0 +1,82 @@ +var LodashWrapper = require('./_LodashWrapper'), + flatRest = require('./_flatRest'), + getData = require('./_getData'), + getFuncName = require('./_getFuncName'), + isArray = require('./isArray'), + isLaziable = require('./_isLaziable'); + +/** Used as the size to enable large array optimizations. */ +var LARGE_ARRAY_SIZE = 200; + +/** Error message constants. */ +var FUNC_ERROR_TEXT = 'Expected a function'; + +/** Used to compose bitmasks for function metadata. */ +var CURRY_FLAG = 8, + PARTIAL_FLAG = 32, + ARY_FLAG = 128, + REARG_FLAG = 256; + +/** + * Creates a `_.flow` or `_.flowRight` function. + * + * @private + * @param {boolean} [fromRight] Specify iterating from right to left. + * @returns {Function} Returns the new flow function. + */ +function createFlow(fromRight) { + return flatRest(function(funcs) { + var length = funcs.length, + index = length, + prereq = LodashWrapper.prototype.thru; + + if (fromRight) { + funcs.reverse(); + } + while (index--) { + var func = funcs[index]; + if (typeof func != 'function') { + throw new TypeError(FUNC_ERROR_TEXT); + } + if (prereq && !wrapper && getFuncName(func) == 'wrapper') { + var wrapper = new LodashWrapper([], true); + } + } + index = wrapper ? index : length; + while (++index < length) { + func = funcs[index]; + + var funcName = getFuncName(func), + data = funcName == 'wrapper' ? getData(func) : undefined; + + if (data && isLaziable(data[0]) && + data[1] == (ARY_FLAG | CURRY_FLAG | PARTIAL_FLAG | REARG_FLAG) && + !data[4].length && data[9] == 1 + ) { + wrapper = wrapper[getFuncName(data[0])].apply(wrapper, data[3]); + } else { + wrapper = (func.length == 1 && isLaziable(func)) + ? wrapper[funcName]() + : wrapper.thru(func); + } + } + return function() { + var args = arguments, + value = args[0]; + + if (wrapper && args.length == 1 && + isArray(value) && value.length >= LARGE_ARRAY_SIZE) { + return wrapper.plant(value).value(); + } + var index = 0, + result = length ? funcs[index].apply(this, args) : value; + + while (++index < length) { + result = funcs[index].call(this, result); + } + return result; + }; + }); +} + +module.exports = createFlow; |