Retrieve the return type of the current function

Jacob Carlborg doob at me.com
Wed May 6 08:04:16 UTC 2020


On 2020-05-05 19:11, learner wrote:
> On Tuesday, 5 May 2020 at 16:41:06 UTC, Adam D. Ruppe wrote:
> 
>> typeof(return)
> 
> Thank you, that was indeed easy!
> 
> Is it possible to retrieve also the caller return type? Something like:

Yes, kind of:

void foo(string caller = __FUNCTION__)()
{
     import std.traits : ReturnType;

     alias R = ReturnType!(mixin(caller));
     static assert(is(R == int));
}

int bar()
{
     foo();
     return 0;
}


-- 
/Jacob Carlborg


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