view demo/treeFun.urs @ 545:f31aa2a3a72d

DML
author Adam Chlipala <adamc@hcoop.net>
date Sun, 07 Dec 2008 10:24:23 -0500
parents b393c2fc80f8
children 1fb318c17546
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line source
functor Make(M : sig
                 type key
                 con id :: Name
                 con parent :: Name
                 con cols :: {Type}
                 constraint [id] ~ [parent]
                 constraint [id, parent] ~ cols

                 val key_inj : sql_injectable key
                 val option_key_inj : sql_injectable (option key)

                 table tab : [id = key, parent = option key] ++ cols
             end) : sig

    con id = M.id
    con parent = M.parent

    val tree : ($([id = M.key, parent = option M.key] ++ M.cols) -> xbody)
               -> option M.key
               -> transaction xbody

end