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-rw-r--r--library/summary.mli2
1 files changed, 2 insertions, 0 deletions
diff --git a/library/summary.mli b/library/summary.mli
index a6ad49950..d093d95f2 100644
--- a/library/summary.mli
+++ b/library/summary.mli
@@ -14,6 +14,8 @@ type marshallable =
| `No (* Full data will be store in memory, e.g. for Undo *)
| `Shallow ] (* Only part of the data will be marshalled to a slave process *)
+(** Types of global Coq states. The ['a] type should be pure and marshallable by
+ the standard OCaml marshalling function. *)
type 'a summary_declaration = {
(** freeze_function [true] is for marshalling to disk.
* e.g. lazy must be forced *)