46 lines
1.4 KiB
JavaScript
46 lines
1.4 KiB
JavaScript
var apply = require('./_apply'),
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createCtor = require('./_createCtor'),
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createHybrid = require('./_createHybrid'),
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createRecurry = require('./_createRecurry'),
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getHolder = require('./_getHolder'),
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replaceHolders = require('./_replaceHolders'),
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root = require('./_root');
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/**
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* Creates a function that wraps `func` to enable 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 {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 createCurry(func, bitmask, arity) {
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var Ctor = createCtor(func);
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function wrapper() {
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var length = arguments.length,
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args = Array(length),
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index = length,
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placeholder = getHolder(wrapper);
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while (index--) {
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args[index] = arguments[index];
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}
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var holders = (length < 3 && args[0] !== placeholder && args[length - 1] !== placeholder)
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? []
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: replaceHolders(args, placeholder);
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length -= holders.length;
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if (length < arity) {
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return createRecurry(
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func, bitmask, createHybrid, wrapper.placeholder, undefined,
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args, holders, undefined, undefined, arity - length);
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}
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var fn = (this && this !== root && this instanceof wrapper) ? Ctor : func;
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return apply(fn, this, args);
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}
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return wrapper;
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}
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module.exports = createCurry;
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