typedef scope!?

[ausairman]

This is probably something quite simple, but I'm having trouble declaring a typedef in my namespace scope. Here's a simplified example:

// typedefs.h
namespace MyProject
{
  typedef void (A::B::*p_type_simple_function)();
}

// class_a.h
#include "typedefs.h"
namespace MyProject
{
  class A
  {
    // some constructors, functions, variables, etc. for A
    class B
    {
      p_type_simple_function arr_fun [];
// error: static <error-type> MyProject::A::B::arr_fun[] array of functions is not allowed
    }
  }
}

Adding the typedef just prior to the declaration fixes the issue, so it seems to be some scoping/namespace problem that I just can't figure out:

// class_a.h
namespace MyProject
{
  class A
  {
    // some constructors, functions, variables, etc. for A
    class B
    {
      typedef void (A::B::*p_type_simple_function)();
      p_type_simple_function arr_fun [];
      // the above works fine
    }
  }
}

(I've written this code for the sake of this forum post so please don't mind the typos if any)

[zb0S216C]

ausairman wrote:

namespace MyProject
{
  typedef void (A::B::*p_type_simple_function)();
}

Was this before or after the declaration of "A::B"?

_Wazzak

[ausairman]

... After. Thanks.

[zb0S216C]

ausairman wrote:

// class_a.h
#include "typedefs.h"
namespace MyProject
{
  class A
  {
    // some constructors, functions, variables, etc. for A
    class B
    {
      p_type_simple_function arr_fun [];
// error: static <error-type> MyProject::A::B::arr_fun[] array of functions is not allowed
    }
  }
}

This shouldn't even compile, let alone give you: "error: static <error-type> MyProject::A::B::arr_fun[] array of functions is not allowed".

Because the declaration of "MyProject::p_type_simple_function" appears before the declaration of both "A" and "B", the compiler should complain about "A" and "B" not being declared.

When "p_type_simple_function" is declared inside of "B's" scope, the compiler knows that both "A" and "B" exists, which is why your third code snippet compiles.

_Wazzak