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-rw-r--r--lib/flow.sail2
1 files changed, 2 insertions, 0 deletions
diff --git a/lib/flow.sail b/lib/flow.sail
index 5c69a128..dd917b55 100644
--- a/lib/flow.sail
+++ b/lib/flow.sail
@@ -61,4 +61,6 @@ function __id forall 'n. (x: int('n)) -> int('n) = x
overload __size = {__id}
+val __deref = "reg_deref" : forall ('a : Type). register('a) -> 'a effect {rreg}
+
$endif