Am Mon, 28 Sep 2015 21:40:43 +0000
schrieb Freddy <[email protected]>:
> Are any D idioms you use that you like to share?
> Heres one of mine
> ---
> enum ctfe =
> {
> return 0xdead & 0xbad;
> }();
> ---
Yep, using that often, although I try to get my head around
using functional style one-line expressions where possible to
avoid the boilerplate.
static immutable ctfe = {
bool[256] result;
foreach (i; 0 .. 256)
result = isDigit(i);
return result;
}();
==>
static immutable bool[256] ctfe = iota(256).map!isDigit.array;
==>
static ctfe = ctfeArr!( iota(256).map!isDigit );
enum ctfeArr(alias r)()
{
// r.length doesn't work as static array size
enum length = r.length;
// immutable doesn't work on this (cannot modify const)
ElementType!(typeof(r))[length] result = r.array;
// Cross fingers here ...
return cast(immutable) result;
}
--
Marco
