evaluator and program protocols

2 files changed, 38 insertions, 0 deletions

diff --git a/lib/protocols/Program.ml b/lib/protocols/Program.ml
new file mode 100644
index 0000000..b82cafc
--- /dev/null
+++ b/lib/protocols/Program.ml
@@ -0,0 +1,17 @@
+class type implementation = object
+  method entry_points : string BatFingerTree.t
+
+  method invoke :
+    entry:string ->
+    bindings:Concepts.Tuple.t ->
+    Context.t ->
+    (Handle.t, Concepts.Condition.condition) result
+end
+
+type Handle.protocol += Program of implementation
+type t = implementation
+
+let make impl = Program (impl :> implementation)
+let from handle = Handle.into handle (function Program impl -> Some impl | _ -> None)
+let entry_points i = Handle.invoke i (fun o -> o#entry_points)
+let invoke i ~entry ~bindings ctx = Handle.invoke i (fun o -> o#invoke ~entry ~bindings ctx)
diff --git a/lib/protocols/Program.mli b/lib/protocols/Program.mli
new file mode 100644
index 0000000..a795f16
--- /dev/null
+++ b/lib/protocols/Program.mli
@@ -0,0 +1,21 @@
+type t
+
+class type implementation = object
+  method entry_points : string BatFingerTree.t
+  method invoke :
+    entry:string ->
+    bindings:Concepts.Tuple.t ->
+    Context.t ->
+    (Handle.t, Concepts.Condition.condition) result
+end
+
+val make : #implementation -> Handle.protocol
+val from : Handle.t -> t Handle.interface option
+val entry_points : t Handle.interface -> string BatFingerTree.t
+
+val invoke :
+  t Handle.interface ->
+  entry:string ->
+  bindings:Concepts.Tuple.t ->
+  Context.t ->
+  (Handle.t, Concepts.Condition.condition) result