Last change
on this file since fa375fe was 6a3a178, checked in by Ema <ema_spirova@…>, 3 years ago |
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[6a3a178] | 1 | var createCtor = require('./_createCtor'),
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| 2 | root = require('./_root');
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| 3 |
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| 4 | /** Used to compose bitmasks for function metadata. */
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| 5 | var WRAP_BIND_FLAG = 1;
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| 6 |
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| 7 | /**
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| 8 | * Creates a function that wraps `func` to invoke it with the optional `this`
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| 9 | * binding of `thisArg`.
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| 10 | *
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| 11 | * @private
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| 12 | * @param {Function} func The function to wrap.
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| 13 | * @param {number} bitmask The bitmask flags. See `createWrap` for more details.
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| 14 | * @param {*} [thisArg] The `this` binding of `func`.
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| 15 | * @returns {Function} Returns the new wrapped function.
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| 16 | */
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| 17 | function createBind(func, bitmask, thisArg) {
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| 18 | var isBind = bitmask & WRAP_BIND_FLAG,
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| 19 | Ctor = createCtor(func);
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| 20 |
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| 21 | function wrapper() {
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| 22 | var fn = (this && this !== root && this instanceof wrapper) ? Ctor : func;
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| 23 | return fn.apply(isBind ? thisArg : this, arguments);
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| 24 | }
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| 25 | return wrapper;
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| 26 | }
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| 27 |
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| 28 | module.exports = createBind;
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