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-module(ets_use).
-export([t1/0, t2/0, t3/0, t4/0]).
t1() ->
case n() of
T when is_atom(T) -> atm;
T when is_integer(T) -> int
end.
t2() ->
case n() of
T when is_integer(T) -> int;
T when is_atom(T) -> atm
end.
t3() ->
is_atom(n()). % no warning since atom() is possible
t4() ->
is_integer(n()). % opaque warning since ets:tid() is opaque
n() -> ets:new(n, [named_table]). % -> atom() | ets:tid()
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