Do not assume that the hash of an object is its storage address

2 files changed, 24 insertions, 0 deletions

diff --git a/lib/protocols/Addressable.ml b/lib/protocols/Addressable.ml
new file mode 100644
index 0000000..7e97f08
--- /dev/null
+++ b/lib/protocols/Addressable.ml
@@ -0,0 +1,13 @@
+class type implementation = object
+  method address : Concepts.Hash.hash
+end
+
+type Handle.protocol += Addressable of implementation
+
+type t = implementation
+
+let make impl = Addressable (impl :> implementation)
+
+let from handle = Handle.into handle (function Addressable impl -> Some impl | _ -> None)
+
+let address i = Handle.invoke i (fun o -> o#address)
diff --git a/lib/protocols/Addressable.mli b/lib/protocols/Addressable.mli
new file mode 100644
index 0000000..2d9c14d
--- /dev/null
+++ b/lib/protocols/Addressable.mli
@@ -0,0 +1,11 @@
+type t
+
+class type implementation = object
+  method address : Concepts.Hash.hash
+end
+
+val make : #implementation -> Handle.protocol
+
+val from : Handle.t -> t Handle.interface option
+
+val address : t Handle.interface -> Concepts.Hash.hash