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-rw-r--r--src/pretty_print_coq.ml4
1 files changed, 4 insertions, 0 deletions
diff --git a/src/pretty_print_coq.ml b/src/pretty_print_coq.ml
index 4596f23f..27484560 100644
--- a/src/pretty_print_coq.ml
+++ b/src/pretty_print_coq.ml
@@ -1775,6 +1775,10 @@ let doc_exp, doc_let =
| E_aux (E_if (c', t', e'), _)
| E_aux (E_cast (_, E_aux (E_if (c', t', e'), _)), _) ->
if_exp ctxt true c' t' e'
+ (* Special case to prevent current arm decoder becoming a staircase *)
+ (* TODO: replace with smarter pretty printing *)
+ | E_aux (E_internal_plet (pat,exp1,E_aux (E_cast (typ, (E_aux (E_if (_, _, _), _) as exp2)),_)),ann) when Typ.compare typ unit_typ == 0 ->
+ string "else" ^/^ top_exp ctxt false (E_aux (E_internal_plet (pat,exp1,exp2),ann))
| _ -> prefix 2 1 (string "else") (top_exp ctxt false e)
in
(prefix 2 1