Parameter given as typeof( ({-}) ) gets unpredictable compiler error

[mlbrooks]

Is a possible blocker of a suggested approach to fixing #280.

The function declaration

void f( typeof( ({ foo(); }) ), int );

suffers from the f-actual error detailed below, while these ones

   void g( typeof( ({ 42   ; }) ), int );
   void h( typeof( ({ foo(); }) )      );

are fine.

Note that

• f has two parameters and the ({-}) wrapping a function call
• g has two parameters
• h the ({-}) wrapping a function call

f-actual: cfa -c test.cfa gives "error: invalid type void in function type". FYI it occurs after -Past, before -Pvaldecl.

f-expected, g- and h- actual and expected: cfa -c test.cfa produces a test.o.