[K2] Disappeared UNSUPPORTED_FEATURE (2)

Added a check for the enabled context receivers feature flag for declaration.

^KT-59913

compiler/testData/diagnostics/tests/extensions/contextReceivers/labelsFromClassNameForbidden.fir.kt

@@ -3,11 +3,11 @@ fun List<Int>.f() {
     this@List.size
 }
 
-context(String)
+<!UNSUPPORTED_FEATURE!>context(String)<!>
 fun Int.f() {
     this@String.length
     this@Int.toDouble()
 }
 
-context(String)
+<!UNSUPPORTED_FEATURE!>context(String)<!>
 val p: String get() = this@String

compiler/testData/diagnostics/tests/extensions/contextReceivers/unsupported.fir.kt

@@ -1,6 +1,6 @@
 // !DIAGNOSTICS: -UNCHECKED_CAST
 
-context(Any)
+<!UNSUPPORTED_FEATURE!>context(Any)<!>
 fun f(g: <!UNSUPPORTED_FEATURE!>context(Any) () -> Unit<!>, value: Any): <!UNSUPPORTED_FEATURE!>context(A) () -> Unit<!> {
     return value as <!UNSUPPORTED_FEATURE!>(context(A) () -> Unit)<!>
 }
@@ -9,19 +9,25 @@ fun f(g: () -> Unit, value: Any) : () -> Unit {
     return g
 }
 
-context(Any)
+<!UNSUPPORTED_FEATURE!>context(Any)<!>
 fun sameAsFWithoutNonContextualCounterpart(g: () -> Unit, value: Any) : () -> Unit {
     return g
 }
 
-context(Any) val p get() = 42
+<!UNSUPPORTED_FEATURE!>context(Any)<!> val p get() = 42
 
-context(String, Int)
+<!UNSUPPORTED_FEATURE!>context(String, Int)<!>
+class D constructor(){}
+
+<!UNSUPPORTED_FEATURE!>context(String, Int)<!>
+class C(){}
+
+<!UNSUPPORTED_FEATURE!>context(String, Int)<!>
 class A {
-    context(Any)
+    <!UNSUPPORTED_FEATURE!>context(Any)<!>
     val p: Any get() = 42
 
-    context(String, Int)
+    <!UNSUPPORTED_FEATURE!>context(String, Int)<!>
     fun m() {}
 }
 

compiler/testData/diagnostics/tests/extensions/contextReceivers/unsupported.kt

@@ -16,6 +16,12 @@ fun sameAsFWithoutNonContextualCounterpart(g: () -> Unit, value: Any) : () -> Un
 
 <!UNSUPPORTED_FEATURE!>context(Any)<!> val p get() = 42
 
+<!UNSUPPORTED_FEATURE!>context(String, Int)<!>
+class D constructor(){}
+
+<!UNSUPPORTED_FEATURE!>context(String, Int)<!>
+class C(){}
+
 <!UNSUPPORTED_FEATURE!>context(String, Int)<!>
 class A {
     <!UNSUPPORTED_FEATURE!>context(Any)<!>

compiler/testData/diagnostics/tests/extensions/contextReceivers/unsupported.txt

@@ -14,3 +14,18 @@ context(kotlin.String, kotlin.Int) public final class A {
     context(kotlin.String, kotlin.Int) public final fun m(): kotlin.Unit
     public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
 }
+
+context(kotlin.String, kotlin.Int) public final class C {
+    public constructor C()
+    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
+}
+
+context(kotlin.String, kotlin.Int) public final class D {
+    public constructor D()
+    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/testsWithJvmBackend/contextReceivers/kt59590WithContextReceiver.fir.diag.txt

@@ -2,6 +2,8 @@
     context(O) val INSTANCE: O? defined in O
     val INSTANCE: O defined in O
 
+/kt59590WithContextReceiver.fir.kt:5:5: error: The feature "context receivers" is experimental and should be enabled explicitly
+
 /kt59590WithContextReceiver.fir.kt:5:5: error: Platform declaration clash: The following declarations have the same JVM signature (INSTANCELO;):
     context(O) val INSTANCE: O? defined in O
     val INSTANCE: O defined in O

compiler/testData/diagnostics/testsWithJvmBackend/contextReceivers/kt59590WithContextReceiver.fir.kt

@@ -2,7 +2,7 @@
 // !RENDER_ALL_DIAGNOSTICS_FULL_TEXT
 
 <!CONFLICTING_JVM_DECLARATIONS!>object O {
-    <!CONFLICTING_JVM_DECLARATIONS!>context(O)
+    <!CONFLICTING_JVM_DECLARATIONS!><!UNSUPPORTED_FEATURE!>context(O)<!>
     @JvmField
     val INSTANCE: O? = null<!>
-}<!>
+}<!>