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@[extern "myAdd"]
opaque myAdd : UInt32 → UInt32 → UInt32

@[extern "wasd"]
opaque wasd : UInt32 → UInt32

namespace Sqlite

private opaque Nonempty : NonemptyType

private def RawConn : Type := Sqlite.Nonempty.type
private def Cursor : Type := Sqlite.Nonempty.type

structure Connection where
  path : String
  conn : RawConn

instance : ToString Connection where
  toString (conn : Connection) := s!"Connection({conn.path})"

inductive Result where
  | ok : Result
  | rows : Cursor → Result
  | error : String → Result

@[extern "lean_sqlite_initialize"]
private opaque initSqlite : IO Unit
builtin_initialize initSqlite

@[extern "lean_sqlite_open"]
private opaque openSqlite : String → IO RawConn

@[extern "lean_sqlite_exec"]
opaque execSqlite : @&RawConn → String → IO Result

def connect (s : String) : IO Connection := do
  let rawconn ← openSqlite s
  pure { path := s, conn := rawconn }

def exec (c : Connection) (query : String) : IO Result :=
  execSqlite c.conn query

end Sqlite