Objective-C blocks in C++ (this actually works!)

block.cc

int __block_invoke_1(struct __block_literal_1 *_block, ...) {
    printf("hello world\n");
    return 1;
}

struct __block_literal_1 {
    void *isa;
    int flags;
    int reserved;
    //int (*invoke)(struct __block_literal_1 *, ...);
    void *invoke;
    struct __block_descriptor_1 *descriptor;
};

static struct __block_descriptor_1 {
    unsigned long int reserved;
    unsigned long int Block_size;
} __block_descriptor_1 = { 0, sizeof(struct __block_literal_1)/*, __block_invoke_1 */};


auto block_literal_1 = new __block_literal_1;
block_literal_1->isa = _NSConcreteGlobalBlock;
block_literal_1->flags = (1<<28);
block_literal_1->invoke = (void*)(int (*) (__block_literal_1 *, ...) ) __block_invoke_1;
//block_literal_1->

// TEST
id NSArray = (id)objc_getClass("NSArray");
id NSString = (id)objc_getClass("NSString");

id str1 = objc_call(id, NSString, "stringWithUTF8String:", "banana");
id str2 = objc_call(id, NSString, "stringWithUTF8String:", "apple");

id array = objc_call(id, NSArray, "arrayWithObjects:", str1, str2);
printf("array: %s\n", description(array));

id sortedArray = objc_call(id, array, "sortedArrayUsingComparator:", block_literal_1);
printf("sorted array: %s\n", description(sortedArray));