pub const Block = struct {
    name: String,
    incoming: u32,
    branches: u32 = 0,
    instructions: std.ArrayListUnmanaged(Instruction.Index),

    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;
        }
    };
}