Multi declaration is now a separate target in KotlinTarget

compiler/frontend/src/org/jetbrains/kotlin/resolve/AnnotationChecker.kt

@@ -171,6 +171,7 @@ public class AnnotationChecker(private val additionalCheckers: Iterable<Addition
                 is JetTypeProjection ->
                     if (annotated.projectionKind == JetProjectionKind.STAR) TargetLists.T_STAR_PROJECTION else TargetLists.T_TYPE_PROJECTION
                 is JetClassInitializer -> TargetLists.T_INITIALIZER
+                is JetMultiDeclaration -> TargetLists.T_MULTI_DECLARATION
                 else -> TargetLists.EMPTY
             }
         }
@@ -182,6 +183,8 @@ public class AnnotationChecker(private val additionalCheckers: Iterable<Addition
                 onlyWithUseSiteTarget(PROPERTY, FIELD, PROPERTY_GETTER, PROPERTY_SETTER, VALUE_PARAMETER)
             }
 
+            val T_MULTI_DECLARATION = targetList(MULTI_DECLARATION)
+
             val T_MEMBER_PROPERTY = targetList(MEMBER_PROPERTY, PROPERTY) {
                 extraTargets(FIELD)
                 onlyWithUseSiteTarget(VALUE_PARAMETER, PROPERTY_GETTER, PROPERTY_SETTER)

compiler/testData/diagnostics/tests/annotations/MultiDeclaration.kt

@@ -0,0 +1,9 @@
+annotation class Ann
+
+data class Pair(val x: Int, val y: Int)
+
+fun foo(): Int {
+    <!WRONG_ANNOTATION_TARGET!>@Ann<!> val (a, b) = Pair(12, 34)
+    <!UNRESOLVED_REFERENCE!>@Err<!> val (c, d) = Pair(56, 78)
+    return a + b + c + d
+}

compiler/testData/diagnostics/tests/annotations/MultiDeclaration.txt

@@ -0,0 +1,22 @@
+package
+
+public fun foo(): kotlin.Int
+
+@kotlin.annotation.annotation() public final class Ann : kotlin.Annotation {
+    public constructor Ann()
+    public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+}
+
+@kotlin.data() public final class Pair {
+    public constructor Pair(/*0*/ x: kotlin.Int, /*1*/ y: kotlin.Int)
+    public final val x: kotlin.Int
+    public final val y: kotlin.Int
+    public final /*synthesized*/ fun component1(): kotlin.Int
+    public final /*synthesized*/ fun component2(): kotlin.Int
+    public final /*synthesized*/ fun copy(/*0*/ x: kotlin.Int = ..., /*1*/ y: kotlin.Int = ...): Pair
+    public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+}

compiler/testData/diagnostics/tests/annotations/forParameterAnnotationResolve.kt

@@ -10,5 +10,5 @@ fun foo() {
 
     for (<!WRONG_ANNOTATION_TARGET!>@Ann(3)<!> (x, @Ann(4) y) in bar()) {}
 
-    for (<!UNRESOLVED_REFERENCE, WRONG_ANNOTATION_TARGET!>@Err<!> (x,y) in bar()) {}
+    for (<!UNRESOLVED_REFERENCE!>@Err<!> (x,y) in bar()) {}
 }

compiler/tests/org/jetbrains/kotlin/checkers/JetDiagnosticsTestGenerated.java

@@ -813,6 +813,12 @@ public class JetDiagnosticsTestGenerated extends AbstractJetDiagnosticsTest {
                 doTest(fileName);
             }
 
+            @TestMetadata("MultiDeclaration.kt")
+            public void testMultiDeclaration() throws Exception {
+                String fileName = JetTestUtils.navigationMetadata("compiler/testData/diagnostics/tests/annotations/MultiDeclaration.kt");
+                doTest(fileName);
+            }
+
             @TestMetadata("MutuallyRecursivelyAnnotatedGlobalFunction.kt")
             public void testMutuallyRecursivelyAnnotatedGlobalFunction() throws Exception {
                 String fileName = JetTestUtils.navigationMetadata("compiler/testData/diagnostics/tests/annotations/MutuallyRecursivelyAnnotatedGlobalFunction.kt");

core/descriptors/src/org/jetbrains/kotlin/descriptors/annotations/KotlinTarget.kt

@@ -59,7 +59,8 @@ public enum class KotlinTarget(val description: String, val isDefault: Boolean =
     MEMBER_PROPERTY("member property", false), // includes PROPERTY_PARAMETER
     TOP_LEVEL_PROPERTY("top level property", false),
 
-    INITIALIZER("initializer", false)
+    INITIALIZER("initializer", false),
+    MULTI_DECLARATION("multi declaration", false)
     ;
 
     companion object {