[ObjCExport] Add translation of functions and properties extensions

KT-65630

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() {}
+}