translate a macro to D

[teo]

On Wed, 06 Jul 2011 16:21:31 +0200, Trass3r wrote:

> Am 06.07.2011, 16:15 Uhr, schrieb teo <teo.ubuntu at yahoo.com>:
> 
>> What is the best way to translate following to D?
>>
>> #define MAKELONG(a, b) \
>>     ((LONG) (((WORD) (a)) | ((DWORD) ((WORD) (b))) << 16))
>>
>> The point is I would like to be able to use that at compile-time. The
>> macro is supposed to define some constants.
> 
> Just turn it into a function.
> If you assign it to an enum or use it as an initializer for global
> immutables it should be evaluated at compile-time.

Thank you. That did the trick.
However I am facing another problem:

There is a macro, which obtains the size of a type
#define TYPESIZE(t) (sizeof(t))

Example:
printf("%ld\n", TYPESIZE(short));
printf("%ld\n", TYPESIZE(struct A));

The  TYPESIZE macro is used within another macro which defines constants.
#define M(a,b,size) \
	 ((a) << SHIFT_A) | \
	 ((b)   << SHIFT_B) | \
	 ((size) << SHIFT_SIZE))
#define MM(a,b,type)	    M((a),(b),(TYPESIZE(type)))

Example:
#define C1    MM(1, 2, struct A)
#define C2    MM(3, 4, struct B)

How can I translate that to D?