[AA] KtAnnotationApplication: make index nullable

^KT-56046

analysis/analysis-api/src/org/jetbrains/kotlin/analysis/api/annotations/KtAnnotationApplication.kt

@@ -15,7 +15,7 @@ import org.jetbrains.kotlin.psi.KtCallElement
  * Some examples:
  * - For declarations: `@Deprecated("Should not be used") fun foo(){}`
  * - For types: `fun foo(x: List<@A Int>){}`
- * - Inside other annotation (`B` is annotation here): `@A(B()) fun foo(){}
+ * - Inside another annotation (`B` is annotation here): `@A(B()) fun foo(){}
  */
 public sealed interface KtAnnotationApplication {
     /**
@@ -24,7 +24,7 @@ public sealed interface KtAnnotationApplication {
     public val classId: ClassId?
 
     /**
-     * PsiElement which was used to apply annotation to declaration/type.
+     * [com.intellij.psi.PsiElement] which was used to apply annotation to declaration/type.
      *
      * Present only for declarations from sources. For declarations from other places (libraries, stdlib) it's `null`
      */
@@ -33,7 +33,7 @@ public sealed interface KtAnnotationApplication {
     /**
      * [AnnotationUseSiteTarget] to which annotation was applied. May be not-null only for annotation applications for declarations.
      *
-     * See in more details in [Kotlin Documentation](https://kotlinlang.org/docs/annotations.html#annotation-use-site-targets) for more information about annotation targets.
+     * See more details in [Kotlin Documentation](https://kotlinlang.org/docs/annotations.html#annotation-use-site-targets) for more information about annotation targets.
      */
     public val useSiteTarget: AnnotationUseSiteTarget?
 
@@ -43,7 +43,7 @@ public sealed interface KtAnnotationApplication {
     public val isCallWithArguments: Boolean
 
     /**
-     * An index of the annotation in an owner. Can be `-1` in case of annotation arguments
+     * An index of the annotation in an owner. `null` for annotation arguments
      */
-    public val index: Int
+    public val index: Int?
 }

analysis/analysis-api/src/org/jetbrains/kotlin/analysis/api/annotations/KtAnnotationApplicationInfo.kt

@@ -10,39 +10,16 @@ import org.jetbrains.kotlin.name.ClassId
 import org.jetbrains.kotlin.psi.KtCallElement
 
 /**
- * Overview of annotation to some declaration or type.
+ * Info of annotation to some declaration or type.
  *
  * Some examples:
  * - For declarations: `@Deprecated("Should not be used") fun foo(){}`
  * - For types: `fun foo(x: List<@A Int>){}`
  */
 public data class KtAnnotationApplicationInfo(
-    /**
-     * The [ClassId] of applied annotation. [ClassId] is a fully qualified name on annotation class.
-     */
     public override val classId: ClassId?,
-
-    /**
-     * [com.intellij.psi.PsiElement] which was used to apply annotation to declaration/type.
-     *
-     * Present only for declarations from sources. For declarations from other places (libraries, stdlib) it's `null`
-     */
     public override val psi: KtCallElement?,
-
-    /**
-     * [AnnotationUseSiteTarget] to which annotation was applied. May be not-null only for annotation applications for declarations.
-     *
-     * See in more details in [Kotlin Documentation](https://kotlinlang.org/docs/annotations.html#annotation-use-site-targets) for more information about annotation targets.
-     */
     public override val useSiteTarget: AnnotationUseSiteTarget?,
-
-    /**
-     * **true** if the annotation has any arguments
-     */
     public override val isCallWithArguments: Boolean,
-
-    /**
-     * An index of the annotation in an owner
-     */
     public override val index: Int,
 ) : KtAnnotationApplication

analysis/analysis-api/src/org/jetbrains/kotlin/analysis/api/annotations/KtAnnotationApplicationWithArgumentsInfo.kt

@@ -18,7 +18,7 @@ public data class KtAnnotationApplicationWithArgumentsInfo(
      * A list of annotation arguments which were applied when constructing annotation. Every argument is [KtAnnotationValue]
      */
     public val arguments: List<KtNamedAnnotationValue>,
-    override val index: Int,
+    override val index: Int?,
 ) : KtAnnotationApplication {
     override val isCallWithArguments: Boolean get() = arguments.isNotEmpty()
 }