--- /dev/null
+'use strict';
+var defineProperty = require('../internals/object-define-property').f;
+var create = require('../internals/object-create');
+var redefineAll = require('../internals/redefine-all');
+var bind = require('../internals/function-bind-context');
+var anInstance = require('../internals/an-instance');
+var iterate = require('../internals/iterate');
+var defineIterator = require('../internals/define-iterator');
+var setSpecies = require('../internals/set-species');
+var DESCRIPTORS = require('../internals/descriptors');
+var fastKey = require('../internals/internal-metadata').fastKey;
+var InternalStateModule = require('../internals/internal-state');
+
+var setInternalState = InternalStateModule.set;
+var internalStateGetterFor = InternalStateModule.getterFor;
+
+module.exports = {
+ getConstructor: function (wrapper, CONSTRUCTOR_NAME, IS_MAP, ADDER) {
+ var C = wrapper(function (that, iterable) {
+ anInstance(that, C, CONSTRUCTOR_NAME);
+ setInternalState(that, {
+ type: CONSTRUCTOR_NAME,
+ index: create(null),
+ first: undefined,
+ last: undefined,
+ size: 0
+ });
+ if (!DESCRIPTORS) that.size = 0;
+ if (iterable != undefined) iterate(iterable, that[ADDER], { that: that, AS_ENTRIES: IS_MAP });
+ });
+
+ var getInternalState = internalStateGetterFor(CONSTRUCTOR_NAME);
+
+ var define = function (that, key, value) {
+ var state = getInternalState(that);
+ var entry = getEntry(that, key);
+ var previous, index;
+ // change existing entry
+ if (entry) {
+ entry.value = value;
+ // create new entry
+ } else {
+ state.last = entry = {
+ index: index = fastKey(key, true),
+ key: key,
+ value: value,
+ previous: previous = state.last,
+ next: undefined,
+ removed: false
+ };
+ if (!state.first) state.first = entry;
+ if (previous) previous.next = entry;
+ if (DESCRIPTORS) state.size++;
+ else that.size++;
+ // add to index
+ if (index !== 'F') state.index[index] = entry;
+ } return that;
+ };
+
+ var getEntry = function (that, key) {
+ var state = getInternalState(that);
+ // fast case
+ var index = fastKey(key);
+ var entry;
+ if (index !== 'F') return state.index[index];
+ // frozen object case
+ for (entry = state.first; entry; entry = entry.next) {
+ if (entry.key == key) return entry;
+ }
+ };
+
+ redefineAll(C.prototype, {
+ // 23.1.3.1 Map.prototype.clear()
+ // 23.2.3.2 Set.prototype.clear()
+ clear: function clear() {
+ var that = this;
+ var state = getInternalState(that);
+ var data = state.index;
+ var entry = state.first;
+ while (entry) {
+ entry.removed = true;
+ if (entry.previous) entry.previous = entry.previous.next = undefined;
+ delete data[entry.index];
+ entry = entry.next;
+ }
+ state.first = state.last = undefined;
+ if (DESCRIPTORS) state.size = 0;
+ else that.size = 0;
+ },
+ // 23.1.3.3 Map.prototype.delete(key)
+ // 23.2.3.4 Set.prototype.delete(value)
+ 'delete': function (key) {
+ var that = this;
+ var state = getInternalState(that);
+ var entry = getEntry(that, key);
+ if (entry) {
+ var next = entry.next;
+ var prev = entry.previous;
+ delete state.index[entry.index];
+ entry.removed = true;
+ if (prev) prev.next = next;
+ if (next) next.previous = prev;
+ if (state.first == entry) state.first = next;
+ if (state.last == entry) state.last = prev;
+ if (DESCRIPTORS) state.size--;
+ else that.size--;
+ } return !!entry;
+ },
+ // 23.2.3.6 Set.prototype.forEach(callbackfn, thisArg = undefined)
+ // 23.1.3.5 Map.prototype.forEach(callbackfn, thisArg = undefined)
+ forEach: function forEach(callbackfn /* , that = undefined */) {
+ var state = getInternalState(this);
+ var boundFunction = bind(callbackfn, arguments.length > 1 ? arguments[1] : undefined, 3);
+ var entry;
+ while (entry = entry ? entry.next : state.first) {
+ boundFunction(entry.value, entry.key, this);
+ // revert to the last existing entry
+ while (entry && entry.removed) entry = entry.previous;
+ }
+ },
+ // 23.1.3.7 Map.prototype.has(key)
+ // 23.2.3.7 Set.prototype.has(value)
+ has: function has(key) {
+ return !!getEntry(this, key);
+ }
+ });
+
+ redefineAll(C.prototype, IS_MAP ? {
+ // 23.1.3.6 Map.prototype.get(key)
+ get: function get(key) {
+ var entry = getEntry(this, key);
+ return entry && entry.value;
+ },
+ // 23.1.3.9 Map.prototype.set(key, value)
+ set: function set(key, value) {
+ return define(this, key === 0 ? 0 : key, value);
+ }
+ } : {
+ // 23.2.3.1 Set.prototype.add(value)
+ add: function add(value) {
+ return define(this, value = value === 0 ? 0 : value, value);
+ }
+ });
+ if (DESCRIPTORS) defineProperty(C.prototype, 'size', {
+ get: function () {
+ return getInternalState(this).size;
+ }
+ });
+ return C;
+ },
+ setStrong: function (C, CONSTRUCTOR_NAME, IS_MAP) {
+ var ITERATOR_NAME = CONSTRUCTOR_NAME + ' Iterator';
+ var getInternalCollectionState = internalStateGetterFor(CONSTRUCTOR_NAME);
+ var getInternalIteratorState = internalStateGetterFor(ITERATOR_NAME);
+ // add .keys, .values, .entries, [@@iterator]
+ // 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
+ defineIterator(C, CONSTRUCTOR_NAME, function (iterated, kind) {
+ setInternalState(this, {
+ type: ITERATOR_NAME,
+ target: iterated,
+ state: getInternalCollectionState(iterated),
+ kind: kind,
+ last: undefined
+ });
+ }, function () {
+ var state = getInternalIteratorState(this);
+ var kind = state.kind;
+ var entry = state.last;
+ // revert to the last existing entry
+ while (entry && entry.removed) entry = entry.previous;
+ // get next entry
+ if (!state.target || !(state.last = entry = entry ? entry.next : state.state.first)) {
+ // or finish the iteration
+ state.target = undefined;
+ return { value: undefined, done: true };
+ }
+ // return step by kind
+ if (kind == 'keys') return { value: entry.key, done: false };
+ if (kind == 'values') return { value: entry.value, done: false };
+ return { value: [entry.key, entry.value], done: false };
+ }, IS_MAP ? 'entries' : 'values', !IS_MAP, true);
+
+ // add [@@species], 23.1.2.2, 23.2.2.2
+ setSpecies(CONSTRUCTOR_NAME);
+ }
+};
projects / dotfiles / .git / blobdiff