Ignore synthetic annotation classes generated in-place for instantiation

Fixes #71

src/main/kotlin/api/AsmMetadataLoading.kt

@@ -27,18 +27,19 @@ fun isStatic(access: Int) = access and Opcodes.ACC_STATIC != 0
 fun isFinal(access: Int) = access and Opcodes.ACC_FINAL != 0
 fun isSynthetic(access: Int) = access and Opcodes.ACC_SYNTHETIC != 0
 
-
 fun ClassNode.isEffectivelyPublic(classVisibility: ClassVisibility?) =
     isPublic(access)
             && !isLocal()
             && !isWhenMappings()
+            && !isSyntheticAnnotationClass()
             && (classVisibility?.isPublic(isPublishedApi()) ?: true)
 
 
 val ClassNode.innerClassNode: InnerClassNode? get() = innerClasses.singleOrNull { it.name == name }
 fun ClassNode.isLocal() = outerMethod != null
 fun ClassNode.isInner() = innerClassNode != null
 fun ClassNode.isWhenMappings() = isSynthetic(access) && name.endsWith("\$WhenMappings")
+fun ClassNode.isSyntheticAnnotationClass() = isSynthetic(access) && name.contains("\$annotationImpl\$")
 
 val ClassNode.effectiveAccess: Int get() = innerClassNode?.access ?: access
 val ClassNode.outerClassName: String? get() = innerClassNode?.outerName

src/test/kotlin/cases/annotations/annotation.kt

@@ -0,0 +1,12 @@
+/*
+ * Copyright 2016-2021 JetBrains s.r.o.
+ * Use of this source code is governed by the Apache 2.0 License that can be found in the LICENSE.txt file.
+ */
+
+package cases.annotations
+
+annotation class Foo(val i: Int)
+
+private class Bar {
+    val foo: Foo = Foo(1)
+}

src/test/kotlin/cases/annotations/annotations.txt

@@ -0,0 +1,4 @@
+public abstract interface annotation class cases/annotations/Foo : java/lang/annotation/Annotation {
+	public abstract fun i ()I
+}
+

src/test/kotlin/tests/CasesPublicAPITest.kt

@@ -24,6 +24,8 @@ class CasesPublicAPITest {
     @[Rule JvmField]
     val testName = TestName()
 
+    @Test fun annotations() { snapshotAPIAndCompare(testName.methodName) }
+
     @Test fun companions() { snapshotAPIAndCompare(testName.methodName) }
 
     @Test fun default() { snapshotAPIAndCompare(testName.methodName) }