Re: How can a function pointer required to be extern(C)?

[rempas via Digitalmars-d-learn]

On Wednesday, 12 April 2023 at 20:36:59 UTC, H. S. Teoh wrote:

IMO this is a bug either in D's syntax or in the parser.  I'd 
file an enhancement request.

In the meantime, you can use alias as a workaround:


-------snip-------
extern(C) void* abc(void*) {return null;}

alias FuncPtr = typeof(&abc);
pragma(msg, typeof(abc));
pragma(msg, typeof(&abc));

//void wrapper(extern(C) void* function(void*) callback) {} // 
NG
void wrapper(FuncPtr callback) {} // OK

pragma(msg, typeof(wrapper));
-------snip-------


T

Thank you! As long as there is a way to do it with aliases, I 
don't think that there is a reason to even bother the developers. 
I mean, it will just save me 1 line of code in my whole project 
(because I don't think I'll use this even again somewhere else) 
so I don't think it's worth it. Thank you for your help. Best 
thing with Dlang is the community ;) I wish you to have an 
amazing day!