99 lines
3.3 KiB
JavaScript
99 lines
3.3 KiB
JavaScript
/**
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* Lo-Dash 2.3.0 (Custom Build) <http://lodash.com/>
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* Build: `lodash modularize modern exports="npm" -o ./npm/`
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* Copyright 2012-2013 The Dojo Foundation <http://dojofoundation.org/>
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* Based on Underscore.js 1.5.2 <http://underscorejs.org/LICENSE>
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* Copyright 2009-2013 Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
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* Available under MIT license <http://lodash.com/license>
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*/
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var baseBind = require('./../lodash._basebind'),
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baseCreateWrapper = require('./../lodash._basecreatewrapper'),
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isFunction = require('./../lodash.isfunction');
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/**
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* Used for `Array` method references.
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*
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* Normally `Array.prototype` would suffice, however, using an array literal
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* avoids issues in Narwhal.
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*/
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var arrayRef = [];
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/** Native method shortcuts */
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var push = arrayRef.push;
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/**
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* Creates a function that, when called, either curries or invokes `func`
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* with an optional `this` binding and partially applied arguments.
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*
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* @private
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* @param {Function|string} func The function or method name to reference.
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* @param {number} bitmask The bitmask of method flags to compose.
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* The bitmask may be composed of the following flags:
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* 1 - `_.bind`
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* 2 - `_.bindKey`
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* 4 - `_.curry`
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* 8 - `_.curry` (bound)
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* 16 - `_.partial`
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* 32 - `_.partialRight`
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* @param {Array} [partialArgs] An array of arguments to prepend to those
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* provided to the new function.
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* @param {Array} [partialRightArgs] An array of arguments to append to those
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* provided to the new function.
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* @param {*} [thisArg] The `this` binding of `func`.
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* @param {number} [arity] The arity of `func`.
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* @returns {Function} Returns the new function.
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*/
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function createWrapper(func, bitmask, partialArgs, partialRightArgs, thisArg, arity) {
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var isBind = bitmask & 1,
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isBindKey = bitmask & 2,
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isCurry = bitmask & 4,
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isCurryBound = bitmask & 8,
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isPartial = bitmask & 16,
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isPartialRight = bitmask & 32;
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if (!isBindKey && !isFunction(func)) {
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throw new TypeError;
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}
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if (isPartial && !partialArgs.length) {
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bitmask &= ~16;
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isPartial = partialArgs = false;
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}
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if (isPartialRight && !partialRightArgs.length) {
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bitmask &= ~32;
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isPartialRight = partialRightArgs = false;
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}
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var bindData = func && func.__bindData__;
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if (bindData && bindData !== true) {
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bindData = bindData.slice();
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// set `thisBinding` is not previously bound
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if (isBind && !(bindData[1] & 1)) {
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bindData[4] = thisArg;
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}
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// set if previously bound but not currently (subsequent curried functions)
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if (!isBind && bindData[1] & 1) {
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bitmask |= 8;
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}
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// set curried arity if not yet set
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if (isCurry && !(bindData[1] & 4)) {
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bindData[5] = arity;
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}
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// append partial left arguments
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if (isPartial) {
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push.apply(bindData[2] || (bindData[2] = []), partialArgs);
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}
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// append partial right arguments
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if (isPartialRight) {
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push.apply(bindData[3] || (bindData[3] = []), partialRightArgs);
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}
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// merge flags
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bindData[1] |= bitmask;
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return createWrapper.apply(null, bindData);
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}
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// fast path for `_.bind`
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var creater = (bitmask == 1 || bitmask === 17) ? baseBind : baseCreateWrapper;
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return creater([func, bitmask, partialArgs, partialRightArgs, thisArg, arity]);
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}
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module.exports = createWrapper;
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