%%
%% %CopyrightBegin%
%% 
%% Copyright Ericsson AB 2004-2009. 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.
%% You may obtain a copy of the License at
%%
%%     http://www.apache.org/licenses/LICENSE-2.0
%%
%% Unless required by applicable law or agreed to in writing, software
%% distributed under the License is distributed on an "AS IS" BASIS,
%% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
%% See the License for the specific language governing permissions and
%% limitations under the License.
%% 
%% %CopyrightEnd%
%%
-module(otp_5092).
-export([?MODULE/0]).

?MODULE() ->
    [] = t(),
    [] = t2(),
    [t] = t4(),
    [] = t5(),
    ok.

t() ->
    [t || {C=D}={_,_} <- []].
    
t2() ->
    [X || {X,{Y}={X,X}} <- []].

t4() ->
    [t || "a"++"b" = "ab" <- ["ab"]].

t5() ->
    [{X,Y} || {X} <- [], begin Y = X, Y =:= X end].