Fix sindresorhus#846

jarpoole · Nov 27, 2024 · b7796c7 · b7796c7
1 parent 1d44863
commit b7796c7
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Showing 2 changed files with 8 additions and 1 deletion.
diff --git a/source/is-any.d.ts b/source/is-any.d.ts
@@ -26,4 +26,4 @@ const anyA = get(anyObject, 'a');
 @category Type Guard
 @category Utilities
 */
-export type IsAny<T> = 0 extends 1 & T ? true : false;
+export type IsAny<T> = 0 extends 1 & NoInfer<T> ? true : false;
diff --git a/test-d/is-any.ts b/test-d/is-any.ts
@@ -18,3 +18,10 @@ expectType<IsAny<void>>(false);
 // Missing generic parameter
 // @ts-expect-error
 type A = IsAny;
+
+// Verify that are no circular reference issues   
+// https://github.com/sindresorhus/type-fest/issues/846
+type OnlyAny<T extends IsAny<T> extends true ? any : never> = T;
+type B = OnlyAny<any>
+// @ts-expect-error
+type C = OnlyAny<string>