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-rw-r--r--test/typecheck/pass/mutrec.sail12
1 files changed, 12 insertions, 0 deletions
diff --git a/test/typecheck/pass/mutrec.sail b/test/typecheck/pass/mutrec.sail
new file mode 100644
index 00000000..26dbf729
--- /dev/null
+++ b/test/typecheck/pass/mutrec.sail
@@ -0,0 +1,12 @@
+$include <prelude.sail>
+
+val f : list(int) -> int
+val g : list(int) -> int
+
+function f([| |]) = 0
+and f(h::t) = h + g(t)
+function g([||]) = 0
+and g(h::t) = f(t) - h
+
+val test : unit -> int
+function test() = f([|1,2,3|])