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-rw-r--r--lib/stdlib/src/rand.erl6
1 files changed, 5 insertions, 1 deletions
diff --git a/lib/stdlib/src/rand.erl b/lib/stdlib/src/rand.erl
index dc060e82d9..d455abf7b0 100644
--- a/lib/stdlib/src/rand.erl
+++ b/lib/stdlib/src/rand.erl
@@ -1,7 +1,7 @@
%%
%% %CopyrightBegin%
%%
-%% Copyright Ericsson AB 2015. All Rights Reserved.
+%% Copyright Ericsson AB 2015-2016. All Rights Reserved.
%%
%% Licensed under the Apache License, Version 2.0 (the "License");
%% you may not use this file except in compliance with the License.
@@ -256,6 +256,8 @@ exs64_uniform(Max, {Alg, R}) ->
%% =====================================================================
-type exsplus_state() :: nonempty_improper_list(uint58(), uint58()).
+-dialyzer({no_improper_lists, exsplus_seed/1}).
+
exsplus_seed({A1, A2, A3}) ->
{_, R1} = exsplus_next([(((A1 * 4294967197) + 1) band ?UINT58MASK)|
(((A2 * 4294967231) + 1) band ?UINT58MASK)]),
@@ -263,6 +265,8 @@ exsplus_seed({A1, A2, A3}) ->
tl(R1)]),
R2.
+-dialyzer({no_improper_lists, exsplus_next/1}).
+
%% Advance xorshift116+ state for one step and generate 58bit unsigned integer
-spec exsplus_next(exsplus_state()) -> {uint58(), exsplus_state()}.
exsplus_next([S1|S0]) ->