Fixup of specs in rand

Fixed bad specs introduced in commit ff568b5e818.
Also suppress improper_lists warnings.

1 files changed, 5 insertions, 11 deletions

diff --git a/lib/stdlib/src/rand.erl b/lib/stdlib/src/rand.erl
index 3b1767e731..1f457b9e0e 100644
--- a/lib/stdlib/src/rand.erl
+++ b/lib/stdlib/src/rand.erl
@@ -155,7 +155,7 @@ uniform_s(N, State0 = {#{uniform:=Uniform}, _})
 %% after a large number of call defined for each algorithm.
 %% The large number is algorithm dependent.
 
--spec jump(state()) -> {NewS :: state()}.
+-spec jump(state()) -> NewS :: state().
 jump(State = {#{jump:=Jump}, _}) ->
     Jump(State).
 
@@ -164,7 +164,7 @@ jump(State = {#{jump:=Jump}, _}) ->
 %% and write back the new value to the internal state,
 %% then returns the new value.
 
--spec jump() -> {NewS :: state()}.
+-spec jump() -> NewS :: state().
 
 jump() ->
     seed_put(jump(seed_get())).
@@ -323,16 +323,14 @@ exsplus_uniform(Max, {Alg, R}) ->
 -define(JUMPCONST2, 16#345d2a0f85f788c).
 -define(JUMPELEMLEN, 58).
 
--spec exsplus_jump(exsplus_state()) -> exsplus_state().
-
+-dialyzer({no_improper_lists, exsplus_jump/1}).
+-spec exsplus_jump(state()) -> state().
 exsplus_jump({Alg, S}) ->
     {S1, AS1} = exsplus_jump(S, [0|0], ?JUMPCONST1, ?JUMPELEMLEN),
     {_,  AS2} = exsplus_jump(S1, AS1,  ?JUMPCONST2, ?JUMPELEMLEN),
     {Alg, AS2}.
 
--spec exsplus_jump(state(), state(), pos_integer(), pos_integer()) ->
-           {state(), state()}.
-
+-dialyzer({no_improper_lists, exsplus_jump/4}).
 exsplus_jump(S, AS, _, 0) ->
     {S, AS};
 exsplus_jump(S, [AS0|AS1], J, N) ->
@@ -441,10 +439,6 @@ exs1024_jump({Alg, {L, RL}}) ->
     {ASL, ASR} = lists:split(?RINGLEN - P, AS),
     {Alg, {ASL, lists:reverse(ASR)}}.
 
--spec exs1024_jump(state(), list(non_neg_integer()),
-           list(non_neg_integer()), non_neg_integer(),
-           non_neg_integer(), non_neg_integer()) -> list(non_neg_integer()).
-
 exs1024_jump(_, AS, _, _, _, 0) ->
     AS;
 exs1024_jump(S, AS, [H|T], _, 0, TN) ->