Merge pull request #26777 from Microsoft/recursiveTypeSignatureHelp

Add test for signature help with recursive type

tests/cases/fourslash/signatureHelpInRecursiveType.ts

@@ -0,0 +1,18 @@
+/// <reference path='fourslash.ts'/>
+
+////type Tail<T extends any[]> =
+////	((...args: T) => any) extends ((head: any, ...tail: infer R) => any) ? R : never;
+////
+////type Reverse<List extends any[]> = _Reverse<List, []>;
+////
+////type _Reverse<Source extends any[], Result extends any[] = []> = {
+////	1: Result,
+////	0: _Reverse<Tail<Source>, 0>,
+////}[Source extends [] ? 1 : 0];
+////
+////type Foo = Reverse<[0,/**/]>;
+
+verify.signatureHelp({
+    marker: "",
+    text: "Reverse<List extends any[]>",
+});