Try/Catch with version condition

[aliak]

On Tuesday, 9 April 2019 at 15:03:03 UTC, Adam D. Ruppe wrote:
> On Tuesday, 9 April 2019 at 14:43:54 UTC, foo wrote:
>> But then that requires too much code duplication.
>> What would be the best way to do this?
>
> I'd simply put the try {} body into a helper function, then 
> make the versions just call that function.
>
>
> void helper() {
>    throw new Exception("");
> }
>
> version(foo) {
>   try helper();
>   catch(Exception) {}
> } else {
>   helper();
> }
>
>
> Remember that with D's nested functions, you can define helper 
> functions just about anywhere and containing the same stuff 
> you'd use directly.

Aye, I'd do the same. And if you want to generalize it then maybe 
something like:

void call(alias func)() {
     version (foo) {
         try {
             func();
         } catch (Exception e) {
             writeln(e);
         }
     } else {
         func();
     }
}

void main() {
     call!(() { throw new Exception("Boo"); } );
}

On a side note, this doesn't work: "call!(() => throw new 
Exception("Boo"))". Is there any reason throw *has* to be a 
statement and not an expression?