Index

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

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

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

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