Table lookups - this is pretty definitive

[bearophile]

Andrej Mitrovic:

> Also (untested):
>
> immutable bool[256] tab2 =
>     iota(0, 0x100)
>     .map!(i => isIdentifierChar0(cast(ubyte)i))
>     .array;

Eventually this should work, and avoid the nasty cast:

immutable bool[256] tab3 =
     ubyte
     .max
     .iota!"[]"
     .map!isIdentifierChar0
     .array;


Bye,
bearophile