new DIP47: Outlining member functions of aggregates

[Tove]

Wouldn't this style be an acceptable compromise instead? with 
both declaration and definition 100% identical.

struct S
{
   // member function declarations
   static int mfunc1(int a, int b = 5) pure;
   static int mfunc2(int a, int b = 5) pure;
   static int mfunc3(int a, int b = 5) pure;

   // member function definitions
   static int mfunc1(int a, int b = 5) pure
   {
   }
   static int mfunc2(int a, int b = 5) pure
   {
   }
   static int mfunc3(int a, int b = 5) pure
   {
   }
}