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%%
%% %CopyrightBegin%
%%
%% Copyright Ericsson AB 2004-2009. 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(pmod_basic, [Props]).
-export([lookup/1,or_props/1,prepend/1,append/1,stupid_sum/0]).
-export([bar/1,bar_bar/1]).
lookup(Key) ->
proplists:lookup(Key, Props).
or_props(Keys) ->
Res = or_props_1(Keys, false),
true = is_bool(Res), %is_bool/1 does not use Props.
Res.
prepend(Term) ->
new([Term|Props]).
append(Term) ->
pmod_basic:new(Props++[Term]).
or_props_1([K|Ks], Acc) ->
or_props_1(Ks, proplists:get_bool(K, Props) or Acc);
or_props_1([], Acc) -> Acc.
is_bool(true) -> true;
is_bool(false) -> true;
is_bool(_) -> false.
stupid_sum() ->
put(counter, 0),
Res = stupid_sum_1(Props, 0),
{Res,get(counter)}.
stupid_sum_1([H|T], Sum0) ->
try add(Sum0, H) of
Sum -> stupid_sum_1(T, Sum)
catch
error:_ -> stupid_sum_1(T, Sum0)
after
bump()
end;
stupid_sum_1([], Sum) -> Sum.
bump() ->
put(counter, get(counter)+1).
add(A, B) ->
A+B.
-record(s, {a}).
bar(S) when S#s.a == 0 -> ok.
bar_bar(S) when is_record(S, s) -> ok;
bar_bar(_) -> error.
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