Re: Permitted locations of a version condition

[Phil Deets]

On Thu, 29 Oct 2009 19:32:56 -0500, Phil Deets <pjdee...@gmail.com> wrote:
enum Tag
{
    A, B, C,
    version (5) {
       D, E,
    }
    version (7) {
       F, G,
    }
    // ...
}


Thanks to Daniel Keep on the learn newsgroup, I got a workaround working.


template Version(string symbol) {
  mixin("version("~symbol~") immutable Version = true;"~
     " else immutable Version = false;");
}

mixin(q"ENUM
enum Tag
{
   A, B,
ENUM"~(Version!("symbol")?q"ENUM
   C, D,
ENUM":"")~q"ENUM
   E,
}
ENUM");

That's not pretty, but it's good enough for me; so I'll probably not do  
any compiler hacking.