std.bitarray examples

[Janice Caron]

Here's another possibility you might try:

    struct BitFields
    {
        ubyte n;

        uint a() { return (n >> 6) & 3; }
        uint b() { return (n >> 4) & 3; }
        uint c() { return (n >> 2) & 3; }
        uint d() { return (n) & 3; }

        void a(uint x) { n &= 0x3F; n |= (x & 3) << 6; }
        void b(uint x) { n &= 0xCF; n |= (x & 3) << 4; }
        void c(uint x) { n &= 0xF3; n |= (x & 3) << 2; }
        void d(uint x) { n &= 0xFC; n |= (x & 3); }
    }

Viola. Bitfields in D1.