avoid generator functions

packages/svelte/src/reactivity/map.js

@@ -2,6 +2,7 @@ import { DEV } from 'esm-env';
 import { source, set } from '../internal/client/reactivity/sources.js';
 import { get } from '../internal/client/runtime.js';
 import { UNINITIALIZED } from '../internal/client/constants.js';
+import { map } from './utils.js';
 
 /**
  * @template K
@@ -133,20 +134,17 @@ export class ReactiveMap extends Map {
 		return this.#sources.keys();
 	}
 
-	*values() {
+	values() {
 		get(this.#version);
-
-		for (var source of this.#sources.values()) {
-			yield get(source);
-		}
+		return map(this.#sources.values(), get);
 	}
 
-	*entries() {
+	entries() {
 		get(this.#version);
-
-		for (var [key, source] of this.#sources.entries()) {
-			yield /** @type {[K, V]} */ ([key, get(source)]);
-		}
+		return map(
+			this.#sources.entries(),
+			([key, source]) => /** @type {[K, V]} */ ([key, get(source)])
+		);
 	}
 
 	[Symbol.iterator]() {

packages/svelte/src/reactivity/set.js

@@ -1,6 +1,7 @@
 import { DEV } from 'esm-env';
 import { source, set } from '../internal/client/reactivity/sources.js';
 import { get } from '../internal/client/runtime.js';
+import { map } from './utils.js';
 
 var read_methods = ['forEach', 'isDisjointFrom', 'isSubsetOf', 'isSupersetOf'];
 var set_like_methods = ['difference', 'intersection', 'symmetricDifference', 'union'];
@@ -141,10 +142,8 @@ export class ReactiveSet extends Set {
 		return this.keys();
 	}
 
-	*entries() {
-		for (var key of this.keys()) {
-			yield /** @type {[T, T]} */ ([key, key]);
-		}
+	entries() {
+		return map(this.keys(), (key) => /** @type {[T, T]} */ ([key, key]));
 	}
 
 	[Symbol.iterator]() {

packages/svelte/src/reactivity/utils.js

@@ -0,0 +1,24 @@
+/**
+ * @template T
+ * @template U
+ * @param {Iterable<T>} iterable
+ * @param {(value: T) => U} fn
+ * @returns {IterableIterator<U>}
+ */
+export function map(iterable, fn) {
+	return {
+		[Symbol.iterator]: get_this,
+		next() {
+			for (const value of iterable) {
+				return { done: false, value: fn(value) };
+			}
+
+			return { done: true, value: undefined };
+		}
+	};
+}
+
+/** @this {any} */
+function get_this() {
+	return this;
+}