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- // https://github.com/mbostock/internmap/ v2.0.3 Copyright 2021 Mike Bostock
- (function (global, factory) {
- typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports) :
- typeof define === 'function' && define.amd ? define(['exports'], factory) :
- (global = typeof globalThis !== 'undefined' ? globalThis : global || self, factory(global.internmap = {}));
- }(this, (function (exports) { 'use strict';
-
- class InternMap extends Map {
- constructor(entries, key = keyof) {
- super();
- Object.defineProperties(this, {_intern: {value: new Map()}, _key: {value: key}});
- if (entries != null) for (const [key, value] of entries) this.set(key, value);
- }
- get(key) {
- return super.get(intern_get(this, key));
- }
- has(key) {
- return super.has(intern_get(this, key));
- }
- set(key, value) {
- return super.set(intern_set(this, key), value);
- }
- delete(key) {
- return super.delete(intern_delete(this, key));
- }
- }
-
- class InternSet extends Set {
- constructor(values, key = keyof) {
- super();
- Object.defineProperties(this, {_intern: {value: new Map()}, _key: {value: key}});
- if (values != null) for (const value of values) this.add(value);
- }
- has(value) {
- return super.has(intern_get(this, value));
- }
- add(value) {
- return super.add(intern_set(this, value));
- }
- delete(value) {
- return super.delete(intern_delete(this, value));
- }
- }
-
- function intern_get({_intern, _key}, value) {
- const key = _key(value);
- return _intern.has(key) ? _intern.get(key) : value;
- }
-
- function intern_set({_intern, _key}, value) {
- const key = _key(value);
- if (_intern.has(key)) return _intern.get(key);
- _intern.set(key, value);
- return value;
- }
-
- function intern_delete({_intern, _key}, value) {
- const key = _key(value);
- if (_intern.has(key)) {
- value = _intern.get(key);
- _intern.delete(key);
- }
- return value;
- }
-
- function keyof(value) {
- return value !== null && typeof value === "object" ? value.valueOf() : value;
- }
-
- exports.InternMap = InternMap;
- exports.InternSet = InternSet;
-
- Object.defineProperty(exports, '__esModule', { value: true });
-
- })));
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