Fix @hidden on function implementations

Resolves #2634

CHANGELOG.md

@@ -7,6 +7,7 @@
 -   If a relative linked image is referenced multiple times, TypeDoc will no longer sometimes produce invalid links to the image #2627.
 -   `@link` tags will now be validated in referenced markdown documents, #2629.
 -   `@link` tags are now resolved in project documents, #2629.
+-   `@hidden` is now properly applied when placed in a function implementation comment.
 -   Comments on re-exports are now rendered.
 
 ### Thanks!

src/lib/converter/plugins/CommentPlugin.ts

@@ -634,14 +634,12 @@ export class CommentPlugin extends ConverterComponent {
             (comment.hasModifier("@internal") && this.excludeInternal);
 
         if (
-            isHidden &&
+            !isHidden &&
             reflection.kindOf(ReflectionKind.ContainsCallSignatures)
         ) {
             return (reflection as DeclarationReflection)
                 .getNonIndexSignatures()
-                .every((sig) => {
-                    return !sig.comment || this.isHidden(sig);
-                });
+                .every((sig) => this.isHidden(sig));
         }
 
         return isHidden;

src/test/converter2/issues/gh2634.ts

@@ -0,0 +1,23 @@
+/**
+ * @param a - Number param.
+ */
+export function hidden(a: number): void;
+
+/**
+ * @param a - String param.
+ */
+export function hidden(a: string): void;
+
+/** @hidden */
+export function hidden(a: string | number): void {
+    console.log(a);
+}
+
+/** @hidden */
+export function implicitlyHidden(x: string): void;
+/** @hidden */
+export function implicitlyHidden(x: number): void;
+export function implicitlyHidden() {}
+
+/** @hidden */
+export const hiddenVariableFunc = () => 1;

src/test/issues.c2.test.ts

@@ -1636,4 +1636,9 @@ describe("Issue Tests", () => {
 
         logger.expectNoOtherMessages();
     });
+
+    it("#2634 handles @hidden on function implementations", () => {
+        const project = convert();
+        equal(project.children?.map((c) => c.name) || [], []);
+    });
 });