Sha256: 08d79bfd7e091dff8f24368eab12dc2e1a61a70053cb432b61658229e75d4a98
Contents?: true
Size: 1.44 KB
Versions: 10
Compression:
Stored size: 1.44 KB
Contents
var NATIVE_WEAK_MAP = require('../internals/native-weak-map');
var global = require('../internals/global');
var isObject = require('../internals/is-object');
var hide = require('../internals/hide');
var objectHas = require('../internals/has');
var sharedKey = require('../internals/shared-key');
var hiddenKeys = require('../internals/hidden-keys');
var WeakMap = global.WeakMap;
var set, get, has;
var enforce = function (it) {
return has(it) ? get(it) : set(it, {});
};
var getterFor = function (TYPE) {
return function (it) {
var state;
if (!isObject(it) || (state = get(it)).type !== TYPE) {
throw TypeError('Incompatible receiver, ' + TYPE + ' required');
} return state;
};
};
if (NATIVE_WEAK_MAP) {
var store = new WeakMap();
var wmget = store.get;
var wmhas = store.has;
var wmset = store.set;
set = function (it, metadata) {
wmset.call(store, it, metadata);
return metadata;
};
get = function (it) {
return wmget.call(store, it) || {};
};
has = function (it) {
return wmhas.call(store, it);
};
} else {
var STATE = sharedKey('state');
hiddenKeys[STATE] = true;
set = function (it, metadata) {
hide(it, STATE, metadata);
return metadata;
};
get = function (it) {
return objectHas(it, STATE) ? it[STATE] : {};
};
has = function (it) {
return objectHas(it, STATE);
};
}
module.exports = {
set: set,
get: get,
has: has,
enforce: enforce,
getterFor: getterFor
};
Version data entries
10 entries across 10 versions & 3 rubygems