[Bug c++/98992] attribute malloc error associating a member deallocator with an allocator

[rdiezmail-gcc at yahoo dot de]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98992

R. Diez <rdiezmail-gcc at yahoo dot de> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |rdiezmail-gcc at yahoo dot de

--- Comment #1 from R. Diez <rdiezmail-gcc at yahoo dot de> ---
I have been using the following up to GCC 11.3:

struct MyClass
{
  static void FreeMemory ( const void * pMem ) throw();

  #if __GNUC_PREREQ(11, 0)
    __attribute__ (( malloc, malloc( MyClass::FreeMemory, 1 ) ))
  #else
    __attribute__ (( malloc ))
  #endif

  static void * AllocMemory ( size_t Size ) throw();

  [...]
};

However, GCC 12.1 does not want to accept it anymore:

error: 'malloc' attribute argument 1 does not name a function

I tried placing the attribute outside the class, like this:

__attribute__ (( malloc, malloc( MyClass::FreeMemory, 1 ) ))
void * MyClass::AllocMemory ( size_t Size ) throw()
{
  return malloc( Size );
}

But then I got 2 errors:

error: 'static void MyClass::FreeMemory(const void*)' is protected within this
context
  710 | __attribute__ (( malloc, malloc( MyClass::FreeMemory, 1 ) ))
      |                                           ^~~~~~~~~~

error: 'malloc' attribute argument 1 does not name a function

That cannot be right. GCC should not insist that the deallocator is public.
After all, the allocator AllocMemory is not public.