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-module(badmap_17).
-export([update/1]).
%% Compile this source file with OTP 17.0.
update(Map) ->
try
update_1(Map),
error(update_did_not_fail)
catch
error:{badmap,Map} ->
ok
end,
try
update_2(Map),
error(update_did_not_fail)
catch
error:{badmap,Map} ->
ok
end,
try
update_3(Map),
error(update_did_not_fail)
catch
error:{badmap,Map} ->
ok
end,
ok = update_4(Map),
ok = update_5(Map),
ok.
update_1(M) ->
M#{a=>42}.
update_2(M) ->
M#{a:=42}.
update_3(M) ->
id(M),
M#{a=>42}.
update_4(M) when M#{a=>b} =:= M ->
did_not_fail;
update_4(_) ->
ok.
update_5(M) ->
id(M),
case id(true) of
true when M#{a=>b} =:= M ->
did_not_fail;
true ->
ok
end.
id(I) ->
I.
|
