1 files changed, 77 insertions, 0 deletions
diff --git a/lib/dialyzer/test/opaque_SUITE_data/src/para/para3.erl b/lib/dialyzer/test/opaque_SUITE_data/src/para/para3.erl
new file mode 100644
index 0000000000..792ae40d39
--- /dev/null
+++ b/lib/dialyzer/test/opaque_SUITE_data/src/para/para3.erl
@@ -0,0 +1,77 @@
+-module(para3).
+
+-export([t/0, t1/1, t2/0, ot1/1, ot2/0, t1_adt/0, t2_adt/0]).
+
+-export([exp_adt/0]).
+
+%% More opaque tests.
+
+-export_type([ot1/0, ot1/1, ot1/2, ot1/3, ot1/4, ot1/5]).
+
+-opaque ot1() :: {ot1(_)}.
+
+-opaque ot1(A) :: {ot1(A, A)}.
+
+-opaque ot1(A, B) :: {ot1(A, B, A)}.
+
+-opaque ot1(A, B, C) :: {ot1(A, B, C, A)}.
+
+-opaque ot1(A, B, C, D) :: {ot1(A, B, C, D, A)}.
+
+-opaque ot1(A, B, C, D, E) :: {A, B, C, D, E}.
+
+-spec ot1(_) -> ot1().
+
+ot1(A) ->
+    {{{{{A, A, A, A, A}}}}}.
+
+-spec ot2() -> ot1(). % invalid type spec
+
+ot2() ->
+    foo.
+
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+
+t() ->
+    {{{17}}} = t1(3). %% pattern can never match
+
+-type t1() :: {t1(_)}.
+
+-type t1(A) :: {t1(A, A)}.
+
+-type t1(A, B) :: {t1(A, B, A)}.
+
+-type t1(A, B, C) :: {t1(A, B, C, A)}.
+
+-type t1(A, B, C, D) :: {t1(A, B, C, D, A)}.
+
+-type t1(A, B, C, D, E) :: {A, B, C, D, E}.
+
+-spec t1(_) -> t1().
+
+t1(A) ->
+    {{{{{A, A, A, A, A}}}}}.
+
+-spec t2() -> t1(). % invalid type spec
+
+t2() ->
+    foo.
+
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+
+%% Shows that the list TypeNames in t_from_form must include ArgsLen.
+
+t1_adt() ->
+    {{{{{17}}}}} = para3_adt:t1(3). % breaks the opaqueness
+
+t2_adt() ->
+    {{{{17}}}} = para3_adt:t1(3). % can never match
+
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+
+-type exp() :: para3_adt:exp1(para3_adt:exp2()).
+
+-spec exp_adt() -> exp().
+
+exp_adt() ->
+    3.