const Index = enum(u32) {
    entry,
    _,

    pub fn ptr(self: Index, wip: *WipFunction) *Block {
        return &wip.blocks.items[@intFromEnum(self)];
    }

    pub fn ptrConst(self: Index, wip: *const WipFunction) *const Block {
        return &wip.blocks.items[@intFromEnum(self)];
    }

    pub fn toInst(self: Index, function: *const Function) Instruction.Index {
        return function.blocks[@intFromEnum(self)].instruction;
    }
}