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57 lines
2.1 KiB
JavaScript
57 lines
2.1 KiB
JavaScript
var isLaziable = require('./_isLaziable'),
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setData = require('./_setData'),
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setWrapToString = require('./_setWrapToString');
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/** Used to compose bitmasks for function metadata. */
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var WRAP_BIND_FLAG = 1,
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WRAP_BIND_KEY_FLAG = 2,
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WRAP_CURRY_BOUND_FLAG = 4,
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WRAP_CURRY_FLAG = 8,
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WRAP_PARTIAL_FLAG = 32,
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WRAP_PARTIAL_RIGHT_FLAG = 64;
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/**
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* Creates a function that wraps `func` to continue currying.
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*
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* @private
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* @param {Function} func The function to wrap.
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* @param {number} bitmask The bitmask flags. See `createWrap` for more details.
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* @param {Function} wrapFunc The function to create the `func` wrapper.
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* @param {*} placeholder The placeholder value.
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* @param {*} [thisArg] The `this` binding of `func`.
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* @param {Array} [partials] The arguments to prepend to those provided to
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* the new function.
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* @param {Array} [holders] The `partials` placeholder indexes.
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* @param {Array} [argPos] The argument positions of the new function.
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* @param {number} [ary] The arity cap of `func`.
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* @param {number} [arity] The arity of `func`.
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* @returns {Function} Returns the new wrapped function.
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*/
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function createRecurry(func, bitmask, wrapFunc, placeholder, thisArg, partials, holders, argPos, ary, arity) {
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var isCurry = bitmask & WRAP_CURRY_FLAG,
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newHolders = isCurry ? holders : undefined,
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newHoldersRight = isCurry ? undefined : holders,
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newPartials = isCurry ? partials : undefined,
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newPartialsRight = isCurry ? undefined : partials;
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bitmask |= (isCurry ? WRAP_PARTIAL_FLAG : WRAP_PARTIAL_RIGHT_FLAG);
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bitmask &= ~(isCurry ? WRAP_PARTIAL_RIGHT_FLAG : WRAP_PARTIAL_FLAG);
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if (!(bitmask & WRAP_CURRY_BOUND_FLAG)) {
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bitmask &= ~(WRAP_BIND_FLAG | WRAP_BIND_KEY_FLAG);
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}
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var newData = [
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func, bitmask, thisArg, newPartials, newHolders, newPartialsRight,
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newHoldersRight, argPos, ary, arity
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];
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var result = wrapFunc.apply(undefined, newData);
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if (isLaziable(func)) {
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setData(result, newData);
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}
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result.placeholder = placeholder;
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return setWrapToString(result, func, bitmask);
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}
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module.exports = createRecurry;
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