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import { DEV } from 'esm-env';
import { source, set } from '../internal/client/reactivity/sources.js';
import { get } from '../internal/client/runtime.js';
import { increment } from './utils.js';
var read_methods = ['forEach', 'isDisjointFrom', 'isSubsetOf', 'isSupersetOf'];
var set_like_methods = ['difference', 'intersection', 'symmetricDifference', 'union'];
var inited = false;
/**
* @template T
* @extends {Set<T>}
*/
export class SvelteSet extends Set {
/** @type {Map<T, Source<boolean>>} */
#sources = new Map();
#version = source(0);
#size = source(0);
/**
* @param {Iterable<T> | null | undefined} [value]
*/
constructor(value) {
super();
// If the value is invalid then the native exception will fire here
if (DEV) new Set(value);
if (value) {
for (var element of value) {
super.add(element);
}
this.#size.v = super.size;
}
if (!inited) this.#init();
}
// We init as part of the first instance so that we can treeshake this class
#init() {
inited = true;
var proto = SvelteSet.prototype;
var set_proto = Set.prototype;
for (const method of read_methods) {
// @ts-ignore
proto[method] = function (...v) {
get(this.#version);
// @ts-ignore
return set_proto[method].apply(this, v);
};
}
for (const method of set_like_methods) {
// @ts-ignore
proto[method] = function (...v) {
get(this.#version);
// @ts-ignore
var set = /** @type {Set<T>} */ (set_proto[method].apply(this, v));
return new SvelteSet(set);
};
}
}
/** @param {T} value */
has(value) {
var has = super.has(value);
var sources = this.#sources;
var s = sources.get(value);
if (s === undefined) {
if (!has) {
// If the value doesn't exist, track the version in case it's added later
// but don't create sources willy-nilly to track all possible values
get(this.#version);
return false;
}
s = source(true);
sources.set(value, s);
}
get(s);
return has;
}
/** @param {T} value */
add(value) {
if (!super.has(value)) {
super.add(value);
set(this.#size, super.size);
increment(this.#version);
}
return this;
}
/** @param {T} value */
delete(value) {
var deleted = super.delete(value);
var sources = this.#sources;
var s = sources.get(value);
if (s !== undefined) {
sources.delete(value);
set(s, false);
}
if (deleted) {
set(this.#size, super.size);
increment(this.#version);
}
return deleted;
}
clear() {
if (super.size === 0) {
return;
}
// Clear first, so we get nice console.log outputs with $inspect
super.clear();
var sources = this.#sources;
for (var s of sources.values()) {
set(s, false);
}
sources.clear();
set(this.#size, 0);
increment(this.#version);
}
keys() {
return this.values();
}
values() {
get(this.#version);
return super.values();
}
entries() {
get(this.#version);
return super.entries();
}
[Symbol.iterator]() {
return this.keys();
}
get size() {
return get(this.#size);
}
}
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