%%
%% %CopyrightBegin%
%% 
%% Copyright Ericsson AB 1998-2009. All Rights Reserved.
%% 
%% The contents of this file are subject to the Erlang Public License,
%% Version 1.1, (the "License"); you may not use this file except in
%% compliance with the License. You should have received a copy of the
%% Erlang Public License along with this software. If not, it can be
%% retrieved online at http://www.erlang.org/.
%% 
%% Software distributed under the License is distributed on an "AS IS"
%% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
%% the License for the specific language governing rights and limitations
%% under the License.
%% 
%% %CopyrightEnd%
%%
-module(mac).

-compile(export_all).

-define(A, ?A + ?A).

-define(a, ?a + ?a).
-define(b, x + ?c(2)).
-define(c(Y), x + Y).
-define(d(X), X X).

bar() ->
    1 ?d(?d(?d(?d(?d(?d(?d(+1))))))).

foo1() ->
    ?a.

foo2() ->
    ?b.

foo3() ->
    ?A.

-define( this, ?that).
-define( that, ?this).

talkAbout()->
    ?this==?that.