var isLaziable = require('./_isLaziable'), setData = require('./_setData'); /** Used to compose bitmasks for wrapper metadata. */ var BIND_FLAG = 1, BIND_KEY_FLAG = 2, CURRY_BOUND_FLAG = 4, CURRY_FLAG = 8, PARTIAL_FLAG = 32, PARTIAL_RIGHT_FLAG = 64; /** * Creates a function that wraps `func` to continue currying. * * @private * @param {Function} func The function to wrap. * @param {number} bitmask The bitmask of wrapper flags. See `createWrapper` * for more details. * @param {Function} wrapFunc The function to create the `func` wrapper. * @param {*} placeholder The placeholder value. * @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} [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 createRecurryWrapper(func, bitmask, wrapFunc, placeholder, thisArg, partials, holders, argPos, ary, arity) { var isCurry = bitmask & CURRY_FLAG, newHolders = isCurry ? holders : undefined, newHoldersRight = isCurry ? undefined : holders, newPartials = isCurry ? partials : undefined, newPartialsRight = isCurry ? undefined : partials; bitmask |= (isCurry ? PARTIAL_FLAG : PARTIAL_RIGHT_FLAG); bitmask &= ~(isCurry ? PARTIAL_RIGHT_FLAG : PARTIAL_FLAG); if (!(bitmask & CURRY_BOUND_FLAG)) { bitmask &= ~(BIND_FLAG | BIND_KEY_FLAG); } var newData = [ func, bitmask, thisArg, newPartials, newHolders, newPartialsRight, newHoldersRight, argPos, ary, arity ]; var result = wrapFunc.apply(undefined, newData); if (isLaziable(func)) { setData(result, newData); } result.placeholder = placeholder; return result; } module.exports = createRecurryWrapper;