I love it. Easily one of my favorite things about the language.

Example: shifting more than the width of the shifted integer is illegal behavior in Zig: therefore, the, what, shiftand? let's go with that, the shiftand for a u64 must be a u6 or smaller.

Sounds annoying? No, it's great! Check this out:

    const CodeUnitKind = enum(u2) {
        low, 
        high,
        follow,
        lead,
    };

    const CodeUnit = packed struct(u8) {
        val: u6,
        kind: CodeUnitKind,
    };

It's really nice!