How to convert C macro that calls function returning a struct*?

[Rick Mann]

I've run into a problem creating D bindings for the Mac OS X Carbon API. In particular, I'm trying to find a way to implement the following C macro (context provided):

typedef const struct __CFString * CFStringRef;
#define CFSTR(cStr)  __CFStringMakeConstantString("" cStr "")
CFStringRef  __CFStringMakeConstantString(const char *cStr);	
#define kSomeCFStringConstant      CFSTR("myCFStringConstantValue");

I tried doing this:

struct __CFString {};
typedef const __CFString* CFStringRef;
template CFSTR(char[] inS)
{
	const CFStringRef CFSTR = __CFStringMakeConstantString(inS.ptr);
}
extern (C) CFStringRef __CFStringMakeConstantString(char* cStr);

But I get the following errors:

src/d/darbon/examples/GrabBag/GrabBag.d:49: Error: non-constant expression (__CFStringMakeConstantString)("darbon.grabbag.demoview")
../../src/d/macos/corefoundation/CFString.d:152: Error: non-constant expression (__CFStringMakeConstantString)("darbon.grabbag.demoview")


The first occurs on this line:

	const CFStringRef viewID			=	CFSTR!("darbon.grabbag.demoview");

and the second error is referring to the line inside the template definition.

I'm at a loss. I need to be able to define constants that effectively call __CFStringMakeConstantString(), and I need to be able to call it directly. Any suggestions? (GDC 0.27/DMD 1.00).

Thanks!