How to cast pointer to unnamed struct pointer?

Question

I had this struct the other day:

struct foo_t {
  char a, b, c;
} *foo = (foo_t*)untyped_memory;

…but having a named type for it was excessive. However, its unnamed form:

struct {
  char a, b, c;
} *bar = untyped_memory;

...did not compile because of pointer types being incompatible.

Is there any way to make it work?

Answer 1

If you have access to C++11 or above then you can use decltype i.e.

struct {
  char a, b, c;
} *bar = (decltype(bar))untyped_memory;