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Lady’s Gitweb - Pisces/blob - function.js
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1 // ♓🌟 Piscēs ∷ function.js
2 // ====================================================================
4 // Copyright © 2022 Lady [@ Lady’s Computer].
6 // This Source Code Form is subject to the terms of the Mozilla Public
7 // License, v. 2.0. If a copy of the MPL was not distributed with this
8 // file, You can obtain one at <https://mozilla.org/MPL/2.0/>.
10 import { defineOwnProperty
, isObject
} from "./object.js";
13 * Creates a bound function from the provided function using the
14 * provided this value and arguments list.
16 * ☡ As with call and construct, the arguments must be passed as an
19 export const bind
= (() => {
20 const callBind
= Function
.prototype.call
.bind(
21 Function
.prototype.bind
,
23 const bind
= ($, boundThis
, boundArgs
) =>
24 callBind($, boundThis
, ...boundArgs
);
29 * Calls the provided function with the provided this value and
32 * ☡ This is an alias for Reflect.apply—the arguments must be passed
35 export const call
= Reflect
.apply
;
38 * Constructs the provided function with the provided arguments list
41 * ☡ This is an alias for Reflect.construct—the arguments must be
44 export const construct
= Reflect
.construct
;
46 /** Returns whether the provided value is a constructor. */
47 export const isConstructor
= ($) => {
49 // The provided value is not an object.
52 // The provided value is an object.
58 ); // will throw if $ is not a constructor
67 * Returns a new function which calls the provided function with its
68 * first argument as the `this` value and the remaining arguments
71 * ※ This is effectively an alias for Function.prototype.call.bind.
73 export const makeCallable
= (() => {
74 const functionCall
= Function
.prototype.call
;
75 const callable
= ($) => defineOwnProperty(
76 bind(functionCall
, $, []),
78 { value
: $.length
+ 1 },
84 * Returns whether the provided object inherits from the prototype of
85 * the provided function.
87 export const ordinaryHasInstance
= makeCallable(
88 Function
.prototype[Symbol
.hasInstance
],
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