Re: 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