More operators inside `is(...)` expressions

[Simen Kjærås]

On Tuesday, 1 September 2020 at 09:05:27 UTC, Jacob Carlborg 
wrote:
> On Tuesday, 1 September 2020 at 07:11:45 UTC, Ogi wrote:
>
>> Why use `version` then?
>
> Because that's set automatically by the compiler. Here's a list 
> of the predefined version identifiers set by the compiler [1].
>
> [1] https://dlang.org/spec/version.html#predefined-versions


Also, more versions can be set via the -version compiler flag:

https://dlang.org/dmd-windows.html#switch--version

Perhaps an even more useful version of the above trick:

struct Version {
     template opDispatch(string name) {
         mixin("version ("~name~") enum opDispatch = true; else 
enum opDispatch = false;");
     }
}

static if (Version.Windows) pragma(msg, "Windows machine");
static if (Version.linux) pragma(msg, "Linux machine");

--
   Simen