From 34a651ea2ed36063fbe58d5de0d0c41ae9fbd980 Mon Sep 17 00:00:00 2001
From: David Sherret <dsherret@users.noreply.github.com>
Date: Tue, 26 Mar 2024 21:59:24 -0400
Subject: feat: type declarations for new Set methods (#23090)

Closes #22851
---
 cli/tsc/dts/lib.esnext.collection.d.ts | 31 +++++++++++++++++++++++++++++++
 1 file changed, 31 insertions(+)

(limited to 'cli/tsc')

diff --git a/cli/tsc/dts/lib.esnext.collection.d.ts b/cli/tsc/dts/lib.esnext.collection.d.ts
index a48fd93d5..834b1a6b1 100644
--- a/cli/tsc/dts/lib.esnext.collection.d.ts
+++ b/cli/tsc/dts/lib.esnext.collection.d.ts
@@ -27,3 +27,34 @@ interface MapConstructor {
         keySelector: (item: T, index: number) => K,
     ): Map<K, T[]>;
 }
+
+interface Set<T> {
+    /**
+     * @returns a new Set containing all the elements in this Set and also all the elements in the argument.
+     */
+    union<U>(other: Set<U>): Set<T | U>;
+    /**
+     * @returns a new Set containing all the elements which are both in this Set and in the argument.
+     */
+    intersection<U>(other: Set<U>): Set<T & U>;
+    /**
+     * @returns a new Set containing all the elements in this Set which are not also in the argument.
+     */
+    difference<U>(other: Set<U>): Set<T>;
+    /**
+     * @returns a new Set containing all the elements which are in either this Set or in the argument, but not in both.
+     */
+    symmetricDifference<U>(other: Set<U>): Set<T | U>;
+    /**
+     * @returns a boolean indicating whether all the elements in this Set are also in the argument.
+     */
+    isSubsetOf(other: Set<unknown>): boolean;
+    /**
+     * @returns a boolean indicating whether all the elements in the argument are also in this Set.
+     */
+    isSupersetOf(other: Set<unknown>): boolean;
+    /**
+     * @returns a boolean indicating whether this Set has no elements in common with the argument.
+     */
+    isDisjointFrom(other: Set<unknown>): boolean;
+}
-- 
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