diff options
Diffstat (limited to 'lib/protocols/Relation.ml')
| -rw-r--r-- | lib/protocols/Relation.ml | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/lib/protocols/Relation.ml b/lib/protocols/Relation.ml index af1201b..c1cdfee 100644 --- a/lib/protocols/Relation.ml +++ b/lib/protocols/Relation.ml @@ -8,6 +8,7 @@ end class type implementation = object method contains : Concepts.Tuple.t -> (bool, Concepts.Condition.condition) result + method modes : (Concepts.Mode.t, Concepts.Condition.condition) result end type Handle.protocol += Relation of implementation @@ -17,6 +18,7 @@ let make impl = Relation (impl :> implementation) let from handle = Handle.into handle (function Relation impl -> Some impl | _ -> None) let require handle = from handle |> Option.to_result ~none:(Error.not_a_relation ()) let contains i tuple = Handle.invoke i (fun o -> o#contains tuple) +let modes i = Handle.invoke i (fun o -> o#modes) let heading relation = let open Utilities.Result in |