Function prototype + definition in the same file

[Rainer Schuetze]

On 25.09.2012 13:53, Manu wrote:> So I have this recurring pattern, it's 
really starting to annoy me.
 > It stems from the fact that a function prototype and the definition can
 > not appear in the same file in D (as it can in C/C++)
 > Eg,
 >
[...]
 > I also have numerous more advanced cases of the same problem, and
 > becomes even more unsightly when used in structs to emulate dynamic
 > linkage to static methods of C++ classes.
 >
 > The solution is seemingly trivial; allow function prototypes and
 > definitions to exist in the same file, like in C/C++.
 >

I think this should be allowed, aswell as implementing forward declared 
enums and structs (IIRC the compiler even has some error messages that 
suggest that it is intended).

As a workaround, you could put your prototypes into a struct and 
generate the declarations for the static linking and the stubs for 
dynamic linking from their declarations and run your magic on the 
members of "prototypes":

struct prototypes
{
	void fun1(int a, int b);
	void fun2(int a, int b);
}

mixin(magic([__traits(allMembers, prototypes)])


That way you don't put the symbols into the same scope as the 
prototypes, and you will not add new symbols to the same scope that you 
are iterating over.