[ObjCExport] Add translation of functions and properties extensions

KT-65630

native/objcexport-header-generator/testData/headers/extensionFunctions/!extensionFunctions.h

@@ -24,11 +24,18 @@ __attribute__((objc_subclassing_restricted))
 @interface Foo : Base
 - (instancetype)init __attribute__((swift_name("init()"))) __attribute__((objc_designated_initializer));
 + (instancetype)new __attribute__((availability(swift, unavailable, message="use object initializers instead")));
-- (void)funA __attribute__((swift_name("funA()")));
+- (void)memberFun __attribute__((swift_name("memberFun()")));
 @end
 
 @interface Foo (Extensions)
-- (void)funB __attribute__((swift_name("funB()")));
+- (void)extensionFunA __attribute__((swift_name("extensionFunA()")));
+- (void)extensionFunB __attribute__((swift_name("extensionFunB()")));
+@end
+
+__attribute__((objc_subclassing_restricted))
+@interface FooKt : Base
++ (void)topLevelFunA __attribute__((swift_name("topLevelFunA()")));
++ (void)topLevelFunB __attribute__((swift_name("topLevelFunB()")));
 @end
 
 #pragma pop_macro("_Nullable_result")

native/objcexport-header-generator/testData/headers/extensionFunctions/Foo.kt

@@ -1,5 +1,9 @@
-class Foo {
-    fun funA() {}
-}
+fun topLevelFunA() {}
+fun topLevelFunB() {}
 
-fun Foo.funB() {}
+fun Foo.extensionFunA() {}
+fun Foo.extensionFunB() {}
+
+class Foo {
+    fun memberFun() {}
+}

native/objcexport-header-generator/testData/headers/extensionProperties/!extensionProperties.h

@@ -0,0 +1,45 @@
+#import <Foundation/NSArray.h>
+#import <Foundation/NSDictionary.h>
+#import <Foundation/NSError.h>
+#import <Foundation/NSObject.h>
+#import <Foundation/NSSet.h>
+#import <Foundation/NSString.h>
+#import <Foundation/NSValue.h>
+
+@class Foo;
+
+NS_ASSUME_NONNULL_BEGIN
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Wunknown-warning-option"
+#pragma clang diagnostic ignored "-Wincompatible-property-type"
+#pragma clang diagnostic ignored "-Wnullability"
+
+#pragma push_macro("_Nullable_result")
+#if !__has_feature(nullability_nullable_result)
+#undef _Nullable_result
+#define _Nullable_result _Nullable
+#endif
+
+__attribute__((objc_subclassing_restricted))
+@interface Foo : Base
+- (instancetype)init __attribute__((swift_name("init()"))) __attribute__((objc_designated_initializer));
++ (instancetype)new __attribute__((availability(swift, unavailable, message="use object initializers instead")));
+- (void)memberFun __attribute__((swift_name("memberFun()")));
+@end
+
+@interface Foo (Extensions)
+@property (readonly) int32_t extensionValA __attribute__((swift_name("extensionValA")));
+@property (readonly) int32_t extensionValB __attribute__((swift_name("extensionValB")));
+@property int32_t extensionVarA __attribute__((swift_name("extensionVarA")));
+@property int32_t extensionVarB __attribute__((swift_name("extensionVarB")));
+@end
+
+__attribute__((objc_subclassing_restricted))
+@interface FooKt : Base
+@property (class, readonly) int32_t topLevelPropA __attribute__((swift_name("topLevelPropA")));
+@property (class, readonly) int32_t topLevelPropB __attribute__((swift_name("topLevelPropB")));
+@end
+
+#pragma pop_macro("_Nullable_result")
+#pragma clang diagnostic pop
+NS_ASSUME_NONNULL_END

native/objcexport-header-generator/testData/headers/extensionProperties/Foo.kt

@@ -0,0 +1,18 @@
+val topLevelPropA = 0
+val topLevelPropB = 1
+
+val Foo.extensionValA
+    get() = 0
+val Foo.extensionValB
+    get() = 1
+
+var Foo.extensionVarA
+    get() = 0
+    set(value) {}
+var Foo.extensionVarB
+    get() = 1
+    set(value) {}
+
+class Foo {
+    fun memberFun() {}
+}