Would it make sense for defer to operate on a scope-block, sort of like an if/do/while/for block instead?

That would allow us to write:

   defer close(file);

or:

   defer {
      release_hardware();
      close(port);
   }

I feel like that syntax fits very nicely with other parts of C, and could even potentially lend itself well to some very subtle/creative uses.

I feel like a very C-like defer would:

   - Trigger at the exit of the scope-level where it was declared.

   - Be able to defer a single statement, or a scope-block.

   - Be nestable, since a defer statement just runs its target
     scope-block at the exit of the scope-block where it's defined.

   - Run successive defer statements in LIFO order, allowing later
     defer statements to still use resources that will be cleaned up
     by the earlier ones.