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-rw-r--r--src/mono_util.sml6
1 files changed, 6 insertions, 0 deletions
diff --git a/src/mono_util.sml b/src/mono_util.sml
index 9788a551..a85443d7 100644
--- a/src/mono_util.sml
+++ b/src/mono_util.sml
@@ -328,6 +328,12 @@ fun mapfoldB {typ = fc, exp = fe, bind} =
S.map2 (mfe ctx e,
fn e' =>
(ESignalReturn e', loc))
+ | ESignalBind (e1, e2) =>
+ S.bind2 (mfe ctx e1,
+ fn e1' =>
+ S.map2 (mfe ctx e2,
+ fn e2' =>
+ (ESignalBind (e1', e2'), loc)))
in
mfe
end