Mixin operator 'if' directly

[Nicholas Wilson]

On Saturday, 22 December 2018 at 03:44:09 UTC, Timoses wrote:
> On Wednesday, 19 December 2018 at 15:40:50 UTC, Neia Neutuladh 
> wrote:
>> On Wed, 19 Dec 2018 15:12:14 +0000, bauss wrote:
>> Or while instantiating it:
>>
>> mixin template foo()
>> {
>>   int _ignoreme()
>>   {
>>     if (readln.strip == "abort") throw new AbortException;
>>     return 1;
>>   }
>>   int _alsoIgnoreMe = _ignoreme();
>> }
>> void main()
>> {
>>   mixin foo;
>> }
>
> Awesome hack!
> Being a hack, it would be even nicer if it worked ouf of the 
> box:
>
>     mixin template foo(bool b)
>     {
>         int _impl() { writeln(b); return int.init; }
>         int _ipml2 = _impl();
>     }
>
> vs
>
>     mixin template foo(bool b)
>     {
>         writeln(b);
>     }

https://issues.dlang.org/show_bug.cgi?id=19506