[K/N] Implement frontend checkers for usages forward declaration type

Forward declaration type doesn't exist in runtime. This restricts its possible usages. ^KT-59764
2023-07-04 10:42:02 +02:00
parent 27043bd8a6
commit 6da3ecceab
20 changed files with 456 additions and 3 deletions
@@ -0,0 +1,104 @@
+// FIR_IDENTICAL
+// WITH_STDLIB
+
+// FILE: stdlib.kt
+
+package kotlinx.cinterop
+
+abstract class CStructVar
+interface ObjCObject
+abstract class ObjCObjectBase : ObjCObject
+
+// FILE: cnames.kt
+
+package cnames.structs
+
+class FwdStruct {}
+
+// FILE: objcnamesClasses.kt
+
+package objcnames.classes
+
+class FwdObjcClass {}
+
+// FILE: objcnamesProtocols.kt
+
+package objcnames.protocols
+
+interface FwdProtocol {}
+
+// FILE: lib.kt
+
+package lib
+
+import kotlinx.cinterop.*
+
+class FwdStruct : CStructVar()
+class FwdObjcClass : ObjCObjectBase()
+interface FwdProtocol : ObjCObject
+
+// FILE: lib2.kt
+
+package lib2
+
+class FwdStruct
+class FwdObjcClass
+interface FwdProtocol
+
+
+// FILE: main.kt
+
+// this inspections differs in K1/K2, but unrelated to what is tested in this test
+@file:Suppress("CAST_NEVER_SUCCEEDS", "UNUSED_PARAMETER", "UNUSED_EXPRESSION", "UNUSED_VARIABLE", "INCOMPATIBLE_TYPES")
+
+fun testUnckeckedAsFromAny(x: Any) {
+    <!UNCHECKED_CAST_TO_FORWARD_DECLARATION!>x as? cnames.structs.FwdStruct<!>
+    <!UNCHECKED_CAST_TO_FORWARD_DECLARATION!>x as? objcnames.classes.FwdObjcClass<!>
+    <!UNCHECKED_CAST_TO_FORWARD_DECLARATION!>x as? objcnames.protocols.FwdProtocol<!>
+    if (1 > 0) { <!UNCHECKED_CAST_TO_FORWARD_DECLARATION!>x as cnames.structs.FwdStruct<!> }
+    if (1 > 0) { <!UNCHECKED_CAST_TO_FORWARD_DECLARATION!>x as objcnames.classes.FwdObjcClass<!> }
+    if (1 > 0) { <!UNCHECKED_CAST_TO_FORWARD_DECLARATION!>x as objcnames.protocols.FwdProtocol<!> }
+}
+
+fun testIs(x: Any) : Int {
+    return when {
+        <!CANNOT_CHECK_FOR_FORWARD_DECLARATION!>x is cnames.structs.FwdStruct<!> -> 1
+        <!CANNOT_CHECK_FOR_FORWARD_DECLARATION!>x is objcnames.classes.FwdObjcClass<!> -> 2
+        <!CANNOT_CHECK_FOR_FORWARD_DECLARATION!>x is objcnames.protocols.FwdProtocol<!> -> 3
+        else -> 4
+    }
+}
+
+fun testIs2(x: lib.FwdStruct) = <!CANNOT_CHECK_FOR_FORWARD_DECLARATION!>x is cnames.structs.FwdStruct<!>
+fun testIs3(x: lib.FwdObjcClass) = <!CANNOT_CHECK_FOR_FORWARD_DECLARATION!>x is objcnames.classes.FwdObjcClass<!>
+fun testIs4(x: lib.FwdProtocol) = <!CANNOT_CHECK_FOR_FORWARD_DECLARATION!>x is objcnames.protocols.FwdProtocol<!>
+
+
+fun testClass1(x : cnames.structs.FwdStruct) = x::class
+fun testClass2(x : objcnames.classes.FwdObjcClass) = x::class
+fun testClass3(x : objcnames.protocols.FwdProtocol) = x::class
+fun testClass4() {
+    <!FORWARD_DECLARATION_AS_CLASS_LITERAL!>cnames.structs.FwdStruct::class<!>
+    <!FORWARD_DECLARATION_AS_CLASS_LITERAL!>objcnames.classes.FwdObjcClass::class<!>
+    <!FORWARD_DECLARATION_AS_CLASS_LITERAL!>objcnames.protocols.FwdProtocol::class<!>
+}
+inline fun <reified T> inlineF(x: T) {}
+
+fun testInline1(x : cnames.structs.FwdStruct) = <!FORWARD_DECLARATION_AS_REIFIED_TYPE_ARGUMENT!>inlineF<!>(x)
+fun testInline2(x : objcnames.classes.FwdObjcClass) = <!FORWARD_DECLARATION_AS_REIFIED_TYPE_ARGUMENT!>inlineF<!>(x)
+fun testInline3(x : objcnames.protocols.FwdProtocol) = <!FORWARD_DECLARATION_AS_REIFIED_TYPE_ARGUMENT!>inlineF<!>(x)
+fun testInline4() {
+    val a : (cnames.structs.FwdStruct) -> Unit = ::<!FORWARD_DECLARATION_AS_REIFIED_TYPE_ARGUMENT!>inlineF<!>
+    val b : (objcnames.classes.FwdObjcClass) -> Unit = ::<!FORWARD_DECLARATION_AS_REIFIED_TYPE_ARGUMENT!>inlineF<!>
+    val c : (objcnames.protocols.FwdProtocol) -> Unit = ::<!FORWARD_DECLARATION_AS_REIFIED_TYPE_ARGUMENT!>inlineF<!>
+}
+
+fun testCheckedAs1(x : lib.FwdStruct) = x as cnames.structs.FwdStruct
+fun testCheckedAs2(x : lib.FwdObjcClass) = x as objcnames.classes.FwdObjcClass
+fun testCheckedAs3(x : lib.FwdProtocol) = x as objcnames.protocols.FwdProtocol
+
+fun testUnCheckedAs1(x : lib2.FwdStruct) = <!UNCHECKED_CAST_TO_FORWARD_DECLARATION!>x as cnames.structs.FwdStruct<!>
+fun testUnCheckedAs2(x : lib2.FwdObjcClass) = <!UNCHECKED_CAST_TO_FORWARD_DECLARATION!>x as objcnames.classes.FwdObjcClass<!>
+fun testUnCheckedAs3(x : lib2.FwdProtocol) = <!UNCHECKED_CAST_TO_FORWARD_DECLARATION!>x as objcnames.protocols.FwdProtocol<!>
+
+fun testUnCheckedAs4(x : lib.FwdStruct) = <!UNCHECKED_CAST_TO_FORWARD_DECLARATION!>x as objcnames.classes.FwdObjcClass<!>