FIR checker: introduce member function checker

compiler/testData/diagnostics/tests/multiplatform/headerClass/expectClassWithExplicitAbstractMember.fir.kt

@@ -1,23 +0,0 @@
-// !LANGUAGE: +MultiPlatformProjects
-// MODULE: m1-common
-// FILE: common.kt
-
-interface Foo {
-    fun foo()
-}
-
-expect class NonAbstractClass : Foo {
-    abstract fun bar()
-
-    <!ABSTRACT_PROPERTY_IN_NON_ABSTRACT_CLASS!>abstract<!> val baz: Int
-
-    abstract override fun foo()
-}
-
-expect abstract class AbstractClass : Foo {
-    abstract fun bar()
-
-    abstract val baz: Int
-
-    abstract override fun foo()
-}

compiler/testData/diagnostics/tests/multiplatform/headerClass/expectClassWithExplicitAbstractMember.kt

@@ -1,3 +1,4 @@
+// FIR_IDENTICAL
 // !LANGUAGE: +MultiPlatformProjects
 // MODULE: m1-common
 // FILE: common.kt

compiler/testData/diagnostics/tests/multiplatform/headerFunInNonHeaderClass.fir.kt

@@ -3,7 +3,7 @@
 // FILE: common.kt
 
 class Foo {
-    expect fun bar(): String
+    <!NON_ABSTRACT_FUNCTION_WITH_NO_BODY!>expect fun bar(): String<!>
 }
 
 // MODULE: m1-jvm(m1-common)

compiler/testData/diagnostics/tests/multiplatform/modifierApplicability.fir.kt

@@ -9,7 +9,7 @@ class Outer expect constructor() {
 
     expect init {}
 
-    expect fun foo()
+    <!NON_ABSTRACT_FUNCTION_WITH_NO_BODY!>expect fun foo()<!>
     expect val bar: Int
 }