Ignore parameters of parameters

Resolves #2154

CHANGELOG.md

@@ -9,6 +9,7 @@
 
 -   Fix crash when converting `export default undefined`, #2175.
 -   Fix error in console when clicking on headings in the readme, #2170.
+-   TypeDoc will now ignore parameters of callback parameters when validating that all parameters have documentation, #2154.
 
 ### Thanks!
 

src/lib/validation/documentation.ts

@@ -1,5 +1,6 @@
 import {
     DeclarationReflection,
+    ParameterReflection,
     ProjectReflection,
     Reflection,
     ReflectionKind,
@@ -38,11 +39,24 @@ export function validateDocumentation(
     const toProcess = project.getReflectionsByKind(kinds);
     const seen = new Set<Reflection>();
 
-    while (toProcess.length) {
+    outer: while (toProcess.length) {
         const ref = toProcess.shift()!;
         if (seen.has(ref)) continue;
         seen.add(ref);
 
+        // If there is a parameter inside another parameter, this is probably a callback function.
+        // TypeDoc doesn't support adding comments with @param to nested parameters, so it seems
+        // silly to warn about these.
+        if (ref.kindOf(ReflectionKind.Parameter)) {
+            let r: Reflection | undefined = ref.parent;
+            while (r) {
+                if (r.kindOf(ReflectionKind.Parameter)) {
+                    continue outer;
+                }
+                r = r.parent;
+            }
+        }
+
         if (ref instanceof DeclarationReflection) {
             const signatures =
                 ref.type instanceof ReflectionType

src/test/converter2/validation/callbackParameters.ts

@@ -0,0 +1,20 @@
+/**
+ * Test case from https://github.com/TypeStrong/typedoc/issues/2154
+ * @param data The data object to add equality to
+ * @param equals The equality function
+ * @param hashCode The hash code function
+ */
+export function gh2154(
+    data: unknown,
+    equals: (a: 1, b: 2) => boolean,
+    hashCode: (data: 3) => number
+) {}
+
+export class AnotherTest {
+    /**
+     * Property is documented
+     * @param a test
+     * @param b another
+     */
+    equals!: (a: 1, b: 2) => boolean;
+}

src/test/validation.test.ts

@@ -206,4 +206,12 @@ describe("validateDocumentation", () => {
         );
         logger.expectNoOtherMessages();
     });
+
+    it("Should correctly handle callback parameters", () => {
+        const project = convertValidationFile("callbackParameters.ts");
+        const logger = new TestLogger();
+        validateDocumentation(project, logger, ["Parameter", "Property"]);
+
+        logger.expectNoOtherMessages();
+    });
 });