Welcome to mirror list, hosted at ThFree Co, Russian Federation.

OrdinarySetPrototypeOf.js « 2016 « es-abstract « node_modules - github.com/npm/cli.git - Unnamed repository; edit this file 'description' to name the repository.
summaryrefslogtreecommitdiff
blob: 3541331cae71e37621baa348008325fb75fe4fe0 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
'use strict';

var GetIntrinsic = require('../GetIntrinsic');

var $TypeError = GetIntrinsic('%TypeError%');

var $setProto = require('../helpers/setProto');

var OrdinaryGetPrototypeOf = require('./OrdinaryGetPrototypeOf');
var Type = require('./Type');

// https://ecma-international.org/ecma-262/7.0/#sec-ordinarysetprototypeof

module.exports = function OrdinarySetPrototypeOf(O, V) {
	if (Type(V) !== 'Object' && Type(V) !== 'Null') {
		throw new $TypeError('Assertion failed: V must be Object or Null');
	}
	/*
    var extensible = IsExtensible(O);
    var current = OrdinaryGetPrototypeOf(O);
    if (SameValue(V, current)) {
        return true;
    }
    if (!extensible) {
        return false;
    }
    */
	try {
		$setProto(O, V);
	} catch (e) {
		return false;
	}
	return OrdinaryGetPrototypeOf(O) === V;
	/*
    var p = V;
    var done = false;
    while (!done) {
        if (p === null) {
            done = true;
        } else if (SameValue(p, O)) {
            return false;
        } else {
            if (wat) {
                done = true;
            } else {
                p = p.[[Prototype]];
            }
        }
     }
     O.[[Prototype]] = V;
     return true;
     */
};