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%%---------------------------------------------------------------------------
%% From: Per Hedeland <[email protected]>
%% Date: 11 Feb 2010
%%
%% The code below demonstrates a bug in dialyzer - it produces the warning:
%% Clause guard cannot succeed.
%% The variable Cs was matched against the type any()
%% for the first test/1 clause, but of course the claim can easily be easily
%% refuted by calling test(#cs{}).
%%---------------------------------------------------------------------------
-module(or_bug).
-export([test/1]).
-record(cs, {children = [], actions = []}).
-define(is_internal(X), ((X#cs.children =/= []) or
(X#cs.actions =/= []))).
-define(has_children(X), (X#cs.children /= [])).
test(Cs) when not ?is_internal(Cs) -> foo;
test(Cs) when not ?has_children(Cs) -> bar;
test(Cs) when Cs#cs.children =/= [] -> baz.
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