# Define "string?"
[type "string" eq?] [string?] def

# Define its friends
["i64" "f64" "command" "quote" "bool" "stab"]
[[name] ->
    [type] name push [eq?] concat  # [type "i64" eq?]
    name ["?"] enq "" join         # "i64?"
    quote enq
] map
[[def] concat do!] each!

[unquote] [...] def