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Diffstat (limited to 'node_modules/lodash/_createHybrid.js')
-rw-r--r-- | node_modules/lodash/_createHybrid.js | 92 |
1 files changed, 92 insertions, 0 deletions
diff --git a/node_modules/lodash/_createHybrid.js b/node_modules/lodash/_createHybrid.js new file mode 100644 index 0000000..b671bd1 --- /dev/null +++ b/node_modules/lodash/_createHybrid.js @@ -0,0 +1,92 @@ +var composeArgs = require('./_composeArgs'), + composeArgsRight = require('./_composeArgsRight'), + countHolders = require('./_countHolders'), + createCtor = require('./_createCtor'), + createRecurry = require('./_createRecurry'), + getHolder = require('./_getHolder'), + reorder = require('./_reorder'), + replaceHolders = require('./_replaceHolders'), + root = require('./_root'); + +/** Used to compose bitmasks for function metadata. */ +var WRAP_BIND_FLAG = 1, + WRAP_BIND_KEY_FLAG = 2, + WRAP_CURRY_FLAG = 8, + WRAP_CURRY_RIGHT_FLAG = 16, + WRAP_ARY_FLAG = 128, + WRAP_FLIP_FLAG = 512; + +/** + * Creates a function that wraps `func` to invoke it with optional `this` + * binding of `thisArg`, partial application, and currying. + * + * @private + * @param {Function|string} func The function or method name to wrap. + * @param {number} bitmask The bitmask flags. See `createWrap` for more details. + * @param {*} [thisArg] The `this` binding of `func`. + * @param {Array} [partials] The arguments to prepend to those provided to + * the new function. + * @param {Array} [holders] The `partials` placeholder indexes. + * @param {Array} [partialsRight] The arguments to append to those provided + * to the new function. + * @param {Array} [holdersRight] The `partialsRight` placeholder indexes. + * @param {Array} [argPos] The argument positions of the new function. + * @param {number} [ary] The arity cap of `func`. + * @param {number} [arity] The arity of `func`. + * @returns {Function} Returns the new wrapped function. + */ +function createHybrid(func, bitmask, thisArg, partials, holders, partialsRight, holdersRight, argPos, ary, arity) { + var isAry = bitmask & WRAP_ARY_FLAG, + isBind = bitmask & WRAP_BIND_FLAG, + isBindKey = bitmask & WRAP_BIND_KEY_FLAG, + isCurried = bitmask & (WRAP_CURRY_FLAG | WRAP_CURRY_RIGHT_FLAG), + isFlip = bitmask & WRAP_FLIP_FLAG, + Ctor = isBindKey ? undefined : createCtor(func); + + function wrapper() { + var length = arguments.length, + args = Array(length), + index = length; + + while (index--) { + args[index] = arguments[index]; + } + if (isCurried) { + var placeholder = getHolder(wrapper), + holdersCount = countHolders(args, placeholder); + } + if (partials) { + args = composeArgs(args, partials, holders, isCurried); + } + if (partialsRight) { + args = composeArgsRight(args, partialsRight, holdersRight, isCurried); + } + length -= holdersCount; + if (isCurried && length < arity) { + var newHolders = replaceHolders(args, placeholder); + return createRecurry( + func, bitmask, createHybrid, wrapper.placeholder, thisArg, + args, newHolders, argPos, ary, arity - length + ); + } + var thisBinding = isBind ? thisArg : this, + fn = isBindKey ? thisBinding[func] : func; + + length = args.length; + if (argPos) { + args = reorder(args, argPos); + } else if (isFlip && length > 1) { + args.reverse(); + } + if (isAry && ary < length) { + args.length = ary; + } + if (this && this !== root && this instanceof wrapper) { + fn = Ctor || createCtor(fn); + } + return fn.apply(thisBinding, args); + } + return wrapper; +} + +module.exports = createHybrid; |