Is Block_copy recursive?

Question

I have some code that essentially boils down to this:

-(void)doSomethingWithBlock:(BlockTypedef)block
{
    [Foo doSomethingElseWithBlock:^() {
        block         


        

Answer 1

I quote the Blocks Programming Topics guide on Apple's developer documentation site:

When you copy a block, any references to other blocks from within that block are copied if necessary—an entire tree may be copied (from the top). If you have block variables and you reference a block from within the block, that block will be copied.

When you copy a stack-based block, you get a new block. If you copy a heap-based block, however, you simply increment the retain count of that block and get it back as the returned value of the copy function or method.