Prevent ReportUndocumentedTransformer.kt from reporting "componentN" functions fromd data classes

2 files changed, 48 insertions, 7 deletions

diff --git a/plugins/base/src/main/kotlin/transformers/documentables/ReportUndocumentedTransformer.kt b/plugins/base/src/main/kotlin/transformers/documentables/ReportUndocumentedTransformer.kt
index bb26ceef..7d475571 100644
--- a/plugins/base/src/main/kotlin/transformers/documentables/ReportUndocumentedTransformer.kt
+++ b/plugins/base/src/main/kotlin/transformers/documentables/ReportUndocumentedTransformer.kt
@@ -7,6 +7,7 @@ import org.jetbrains.dokka.plugability.DokkaContext
 import org.jetbrains.dokka.transformers.documentation.DocumentableTransformer
 import org.jetbrains.kotlin.descriptors.CallableMemberDescriptor
 import org.jetbrains.kotlin.descriptors.CallableMemberDescriptor.Kind.FAKE_OVERRIDE
+import org.jetbrains.kotlin.descriptors.CallableMemberDescriptor.Kind.SYNTHESIZED
 import org.jetbrains.kotlin.utils.addToStdlib.safeAs
 
 internal class ReportUndocumentedTransformer : DocumentableTransformer {
@@ -45,6 +46,10 @@ internal class ReportUndocumentedTransformer : DocumentableTransformer {
             return false
         }
 
+        if (isSynthesized(documentable, sourceSet)) {
+            return false
+        }
+
         if (isPrivateOrInternalApi(documentable, sourceSet)) {
             return false
         }
@@ -124,16 +129,23 @@ internal class ReportUndocumentedTransformer : DocumentableTransformer {
     }
 
     private fun isFakeOverride(documentable: Documentable, sourceSet: SourceSetData): Boolean {
+        return callableMemberDescriptorOrNull(documentable, sourceSet)?.kind == FAKE_OVERRIDE
+    }
+
+    private fun isSynthesized(documentable: Documentable, sourceSet: SourceSetData): Boolean {
+        return callableMemberDescriptorOrNull(documentable, sourceSet)?.kind == SYNTHESIZED
+    }
+
+    private fun callableMemberDescriptorOrNull(
+        documentable: Documentable, sourceSet: SourceSetData
+    ): CallableMemberDescriptor? {
         if (documentable is WithExpectActual) {
-            val callableMemberDescriptor = documentable.sources[sourceSet]
+            return documentable.sources[sourceSet]
                 .safeAs<DescriptorDocumentableSource>()?.descriptor
-                .safeAs<CallableMemberDescriptor>()
-
-            if (callableMemberDescriptor?.kind == FAKE_OVERRIDE) {
-                return true
-            }
+                .safeAs()
         }
-        return false
+
+        return null
     }
 
     private fun isPrivateOrInternalApi(documentable: Documentable, sourceSet: SourceSetData): Boolean {
diff --git a/plugins/base/src/test/kotlin/transformers/ReportUndocumentedTransformerTest.kt b/plugins/base/src/test/kotlin/transformers/ReportUndocumentedTransformerTest.kt
index 5be60109..fac1e060 100644
--- a/plugins/base/src/test/kotlin/transformers/ReportUndocumentedTransformerTest.kt
+++ b/plugins/base/src/test/kotlin/transformers/ReportUndocumentedTransformerTest.kt
@@ -150,6 +150,35 @@ class ReportUndocumentedTransformerTest : AbstractCoreTest() {
         }
     }
 
+    @Test
+    fun `data class component functions do not get reported`() {
+        val configuration = dokkaConfiguration {
+            passes {
+                pass {
+                    reportUndocumented = true
+                    sourceRoots = listOf("src/main/kotlin")
+                }
+            }
+        }
+
+        testInline(
+            """
+            |/src/main/kotlin/Test.kt    
+            |package sample
+            |
+            |/** Documented */
+            |data class X(val x: Int) {
+            |}
+            """.trimIndent(),
+            configuration
+        ) {
+            pagesTransformationStage = {
+                assertNoUndocumentedReport(Regex("component"))
+                assertNumberOfUndocumentedReports(1)
+            }
+        }
+    }
+
     @Disabled
     @Test
     fun `undocumented secondary constructor gets reported`() {