144 lines
4.9 KiB
JavaScript
144 lines
4.9 KiB
JavaScript
'use strict';
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var dP = require('./_object-dp').f;
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var create = require('./_object-create');
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var redefineAll = require('./_redefine-all');
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var ctx = require('./_ctx');
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var anInstance = require('./_an-instance');
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var forOf = require('./_for-of');
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var $iterDefine = require('./_iter-define');
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var step = require('./_iter-step');
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var setSpecies = require('./_set-species');
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var DESCRIPTORS = require('./_descriptors');
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var fastKey = require('./_meta').fastKey;
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var validate = require('./_validate-collection');
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var SIZE = DESCRIPTORS ? '_s' : 'size';
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var getEntry = function (that, key) {
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// fast case
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var index = fastKey(key);
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var entry;
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if (index !== 'F') return that._i[index];
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// frozen object case
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for (entry = that._f; entry; entry = entry.n) {
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if (entry.k == key) return entry;
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}
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};
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module.exports = {
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getConstructor: function (wrapper, NAME, IS_MAP, ADDER) {
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var C = wrapper(function (that, iterable) {
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anInstance(that, C, NAME, '_i');
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that._t = NAME; // collection type
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that._i = create(null); // index
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that._f = undefined; // first entry
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that._l = undefined; // last entry
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that[SIZE] = 0; // size
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if (iterable != undefined) forOf(iterable, IS_MAP, that[ADDER], that);
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});
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redefineAll(C.prototype, {
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// 23.1.3.1 Map.prototype.clear()
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// 23.2.3.2 Set.prototype.clear()
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clear: function clear() {
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for (var that = validate(this, NAME), data = that._i, entry = that._f; entry; entry = entry.n) {
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entry.r = true;
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if (entry.p) entry.p = entry.p.n = undefined;
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delete data[entry.i];
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}
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that._f = that._l = undefined;
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that[SIZE] = 0;
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},
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// 23.1.3.3 Map.prototype.delete(key)
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// 23.2.3.4 Set.prototype.delete(value)
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'delete': function (key) {
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var that = validate(this, NAME);
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var entry = getEntry(that, key);
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if (entry) {
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var next = entry.n;
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var prev = entry.p;
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delete that._i[entry.i];
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entry.r = true;
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if (prev) prev.n = next;
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if (next) next.p = prev;
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if (that._f == entry) that._f = next;
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if (that._l == entry) that._l = prev;
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that[SIZE]--;
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} return !!entry;
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},
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// 23.2.3.6 Set.prototype.forEach(callbackfn, thisArg = undefined)
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// 23.1.3.5 Map.prototype.forEach(callbackfn, thisArg = undefined)
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forEach: function forEach(callbackfn /* , that = undefined */) {
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validate(this, NAME);
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var f = ctx(callbackfn, arguments.length > 1 ? arguments[1] : undefined, 3);
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var entry;
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while (entry = entry ? entry.n : this._f) {
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f(entry.v, entry.k, this);
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// revert to the last existing entry
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while (entry && entry.r) entry = entry.p;
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}
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},
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// 23.1.3.7 Map.prototype.has(key)
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// 23.2.3.7 Set.prototype.has(value)
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has: function has(key) {
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return !!getEntry(validate(this, NAME), key);
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}
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});
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if (DESCRIPTORS) dP(C.prototype, 'size', {
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get: function () {
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return validate(this, NAME)[SIZE];
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}
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});
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return C;
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},
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def: function (that, key, value) {
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var entry = getEntry(that, key);
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var prev, index;
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// change existing entry
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if (entry) {
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entry.v = value;
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// create new entry
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} else {
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that._l = entry = {
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i: index = fastKey(key, true), // <- index
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k: key, // <- key
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v: value, // <- value
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p: prev = that._l, // <- previous entry
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n: undefined, // <- next entry
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r: false // <- removed
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};
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if (!that._f) that._f = entry;
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if (prev) prev.n = entry;
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that[SIZE]++;
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// add to index
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if (index !== 'F') that._i[index] = entry;
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} return that;
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},
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getEntry: getEntry,
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setStrong: function (C, NAME, IS_MAP) {
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// add .keys, .values, .entries, [@@iterator]
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// 23.1.3.4, 23.1.3.8, 23.1.3.11, 23.1.3.12, 23.2.3.5, 23.2.3.8, 23.2.3.10, 23.2.3.11
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$iterDefine(C, NAME, function (iterated, kind) {
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this._t = validate(iterated, NAME); // target
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this._k = kind; // kind
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this._l = undefined; // previous
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}, function () {
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var that = this;
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var kind = that._k;
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var entry = that._l;
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// revert to the last existing entry
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while (entry && entry.r) entry = entry.p;
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// get next entry
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if (!that._t || !(that._l = entry = entry ? entry.n : that._t._f)) {
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// or finish the iteration
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that._t = undefined;
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return step(1);
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}
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// return step by kind
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if (kind == 'keys') return step(0, entry.k);
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if (kind == 'values') return step(0, entry.v);
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return step(0, [entry.k, entry.v]);
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}, IS_MAP ? 'entries' : 'values', !IS_MAP, true);
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// add [@@species], 23.1.2.2, 23.2.2.2
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setSpecies(NAME);
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}
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};
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