diff options
Diffstat (limited to '')
| -rw-r--r-- | lib/protocols/Relation.ml | 2 | ||||
| -rw-r--r-- | lib/protocols/Relation.mli | 2 |
2 files changed, 4 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 diff --git a/lib/protocols/Relation.mli b/lib/protocols/Relation.mli index 47d1d3e..28dfdff 100644 --- a/lib/protocols/Relation.mli +++ b/lib/protocols/Relation.mli @@ -2,12 +2,14 @@ type t class type implementation = object method contains : Concepts.Tuple.t -> (bool, Concepts.Condition.condition) result + method modes : (Concepts.Mode.t, Concepts.Condition.condition) result end val make : #implementation -> Handle.protocol val from : Handle.t -> t Handle.interface option val require : Handle.t -> (t Handle.interface, Concepts.Condition.condition) result val contains : t Handle.interface -> Concepts.Tuple.t -> (bool, Concepts.Condition.condition) result +val modes : t Handle.interface -> (Concepts.Mode.t, Concepts.Condition.condition) result (** the heading a relation describes itself with. *) val heading : Handle.t -> (Schematics.relation_description, Concepts.Condition.condition) result |