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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(match_SUITE).
+
+-export([all/1,
+ pmatch/1,mixed/1,aliases/1,match_in_call/1,
+ untuplify/1,shortcut_boolean/1,letify_guard/1,
+ selectify/1]).
+
+-include("test_server.hrl").
+
+all(suite) ->
+ test_lib:recompile(?MODULE),
+ [pmatch,mixed,aliases,match_in_call,untuplify,shortcut_boolean,
+ letify_guard,selectify].
+
+pmatch(Config) when is_list(Config) ->
+ ?line ok = doit(1),
+ ?line ok = doit(2),
+ ?line {error,baz} = doit(3),
+ ?line {error,foobar} = doit(4),
+ ok.
+
+%% Thanks to Tobias Lindahl (HiPE).
+-define(FOO(X),
+ case X of
+ 1 -> foo;
+ 2 -> bar;
+ 3 -> baz;
+ 4 -> foobar
+ end).
+
+doit(X) ->
+ case ?FOO(X) of
+ foo -> ok;
+ bar -> ok;
+ Other -> {error, Other}
+ end.
+
+mixed(Config) when is_list(Config) ->
+ ?line glufs = mixit(1),
+ ?line klafs = mixit(2),
+ ?line fnurra = mixit(3),
+ ?line usch = mixit(4),
+ ?line {error,blurf} = mixit(5),
+ ?line {error,87987987} = mixit(6),
+ ?line {error,{a,b,c}} = mixit(7),
+ ok.
+
+mixit(X) ->
+ case case X of
+ 1 -> a;
+ 2 -> b;
+ 3 -> 42;
+ 4 -> 77;
+ 5 -> blurf;
+ 6 -> 87987987;
+ 7 -> {a,b,c}
+ end of
+ a -> glufs;
+ b -> klafs;
+ 42 -> fnurra;
+ 77 -> usch;
+ Other -> {error,Other}
+ end.
+
+aliases(Config) when is_list(Config) ->
+ %% Lists/strings.
+ ?line ok = str_alias("abc"),
+ ?line ok = str_alias("def"),
+ ?line ok = str_alias("ghi"),
+ ?line ok = str_alias("klm"),
+ ?line ok = str_alias("qrs"),
+ ?line ok = str_alias("xy"),
+ ?line ok = str_alias(""),
+ ?line ok = str_alias([]),
+ ?line error = str_alias("blurf"),
+
+ %% Characters/integers.
+ ?line ok = char_alias($v),
+ ?line ok = char_alias(118),
+ ?line ok = char_alias($w),
+ ?line ok = char_alias(119),
+ ?line ok = char_alias(42),
+ ?line ok = char_alias(3.0),
+ ?line error = char_alias($_),
+ ?line error = char_alias(0),
+
+ ?line {42,42,42} = three(42),
+
+ ?line {1,42,99,1,42,99} = tuple_alias({1,42,99}),
+ ?line {-10,20,-10,20,-10,20} = tuple_alias({-10,20}),
+ ?line 6 = tup_lit_alias({1,2,3}),
+ ?line 6 = tup_lit_alias_rev({1,2,3}),
+
+ ?line {42,42,42,42} = multiple_aliases_1(42),
+ ?line {7,7,7} = multiple_aliases_2(7),
+ ?line {{a,b},{a,b},{a,b}} = multiple_aliases_3({a,b}),
+ ok.
+
+str_alias(V) ->
+ Res = str_alias_1(V),
+ Res = str_alias_2(V).
+
+str_alias_1([$a,$b,$c]="abc"="a"++[$b,$c]=[97,98,99]) -> ok;
+str_alias_1([$d|"ef"]="def") -> ok;
+str_alias_1([$g|"hi"]="g"++"hi"="gh"++"i"="ghi"++"") -> ok;
+str_alias_1("k"++"lm"=[$k|"lm"]) -> ok;
+str_alias_1([113,114,115]="qrs"=[$q,$r,$s]="q"++"r"++"s") -> ok;
+str_alias_1([$x,$y]="xy") -> ok;
+str_alias_1(""=[]) -> ok;
+str_alias_1(_) -> error.
+
+%% Make sure that different line numbers do not matter.
+
+str_alias_2([$a,$b,$c]=
+ "abc"=
+ "a"++[$b,$c
+ ]=
+ [97,98,99
+ ]) -> ok;
+str_alias_2([$d|"ef"]=
+ "def") -> ok;
+str_alias_2([$g|"hi"]=
+ "g"++"hi"=
+ "gh"++"i"=
+ "ghi"++"") -> ok;
+str_alias_2("k"++"lm"=
+ [$k|"lm"
+ ]) -> ok;
+str_alias_2([113,114,115]=
+ "qrs"=[$q,$r,$s
+ ]=
+ "q"++"r"++"s") -> ok;
+str_alias_2([$x,$y]=
+ "xy") -> ok;
+str_alias_2(""=
+ []) -> ok;
+str_alias_2(_) -> error.
+
+char_alias(V) ->
+ Res = char_alias_1(V),
+ Res = char_alias_2(V).
+
+char_alias_1(118=$v) -> ok;
+char_alias_1($w=119) -> ok;
+char_alias_1(42=42) -> ok;
+char_alias_1(3.0=3.0) -> ok;
+char_alias_1(_) -> error.
+
+char_alias_2(118=
+ $v) -> ok;
+char_alias_2($w=
+ 119) -> ok;
+char_alias_2(42=
+ 42) -> ok;
+char_alias_2(3.0=
+ 3.0) -> ok;
+char_alias_2(_) -> error.
+
+three(V) ->
+ Res = three_1(V),
+ Res = three_2(V).
+
+three_1(A=B=C) ->
+ {A,B,C}.
+
+three_2(A=
+ B=
+ C) ->
+ {A,B,C}.
+
+tuple_alias({A,B,C}={X,Y,Z}) ->
+ {A,B,C,X,Y,Z};
+tuple_alias({A,B}={C,D}={E,F}) ->
+ {A,B,C,D,E,F}.
+
+tup_lit_alias({A,B,C}={1,2,3}) ->
+ A+B+C.
+
+tup_lit_alias_rev({1,2,3}={A,B,C}) ->
+ A+B+C.
+
+multiple_aliases_1((A=B)=(C=D)) ->
+ {A,B,C,D}.
+
+multiple_aliases_2((A=B)=(A=C)) ->
+ {A,B,C}.
+
+multiple_aliases_3((A={_,_}=B)={_,_}=C) ->
+ {A,B,C}.
+
+%% OTP-7018.
+
+match_in_call(Config) when is_list(Config) ->
+ ?line mac_a(0),
+ ?line mac_b(1),
+ ?line mac_c(42),
+ ?line mac_d(42),
+ ?line mac_e({gurka,42}),
+
+ ?line [{2,2},{2,2}] = mac_lc([{2,any},{2,2}]),
+ ?line {'EXIT',_} = (catch mac_lc([{1,1}])),
+
+ ok.
+
+mac_a(X) ->
+ id(_Gurka = {gurka,X}),
+ ok.
+
+mac_b(X) ->
+ id(Gurka = {gurka,X}),
+ gurka(Gurka, X),
+ ok.
+
+mac_c(X) ->
+ id(Gurka = Yxa = {gurka,X}),
+ id({Gurka,Yxa}),
+ ok.
+
+mac_d(X) ->
+ id({gurka,42} = {gurka,X}),
+ ok.
+
+mac_e(X) ->
+ id({gurka,42} = X),
+ ok.
+
+mac_lc(E) ->
+ Res = mac_lc1(E),
+ Res = mac_lc2(E).
+
+mac_lc1(E) ->
+ [{X,Y} ||
+ {X,_} <- E,
+ (Y = X) =:= (Y = 1 + 1)].
+
+mac_lc2(E) ->
+ [{X,Y} ||
+ {X,_} <- E,
+ (Y = X) =:= (Y = 2)].
+
+gurka({gurka,X}, X) -> ok.
+
+
+untuplify(Config) when is_list(Config) ->
+ %% We do this to cover sys_core_fold:unalias_pat/1.
+ ?line {1,2,3,4,alias,{[1,2],{3,4},alias}} = untuplify_1([1,2], {3,4}, alias),
+ ?line error = untuplify_1([1,2], {3,4}, 42),
+ ok.
+
+untuplify_1(A, B, C) ->
+ case {A,B,C} of
+ {[X,Y],{Z,W},alias=Alias}=Top ->
+ {X,Y,Z,W,Alias,Top};
+ [_,_]=CantMatch ->
+ CantMatch;
+ _ ->
+ error
+ end.
+
+%% Coverage of beam_dead:shortcut_boolean_label/4.
+shortcut_boolean(Config) when is_list(Config) ->
+ ?line false = shortcut_boolean_1([0]),
+ ?line true = shortcut_boolean_1({42}),
+ ?line maybe = shortcut_boolean_1(self()),
+ ?line {'EXIT',_} = (catch shortcut_boolean_1([a,b])),
+ ?line {'EXIT',_} = (catch shortcut_boolean_1({a,b})),
+ ok.
+
+shortcut_boolean_1(X) ->
+ Outer = case not is_pid(X) of
+ true ->
+ V = case X of
+ [_] -> true;
+ {_} -> false
+ end,
+ not V;
+ false ->
+ maybe
+ end,
+ id(Outer).
+
+
+%% Test sys_core_fold:letify_guard/3.
+letify_guard(Config) when is_list(Config) ->
+ ?line {-15,a} = letify_guard(-15, a),
+ ?line 5 = letify_guard(2, 3),
+ ok.
+
+letify_guard(A, B) ->
+ case {A,B} of
+ %% The tuple will be built in the guard...
+ Z when tuple_size(Z) =:= 2, element(1, Z) < 0 ->
+ %% ... and again here.
+ Z;
+ {X,Y} -> X+Y
+ end.
+
+%% Test combining of is_eq_exact instructions to select_val
+%% instructions in beam_dead and beam_peep.
+
+selectify(Config) when is_list(Config) ->
+ ?line integer = sel_different_types({r,42}),
+ ?line atom = sel_different_types({r,forty_two}),
+ ?line none = sel_different_types({r,18}),
+ ?line {'EXIT',_} = (catch sel_different_types([a,b,c])),
+
+ ?line integer = sel_same_value({r,42}),
+ ?line error = sel_same_value({r,100}),
+ ?line error = sel_same_value(a),
+
+ ?line integer42 = sel_same_value2(42),
+ ?line integer43 = sel_same_value2(43),
+ ?line error = sel_same_value2(44),
+ ok.
+
+sel_different_types({r,_}=T) when element(2, T) =:= forty_two ->
+ atom;
+sel_different_types({r,_}=T) when element(2, T) =:= 42 ->
+ integer;
+sel_different_types({r,_}) ->
+ none.
+
+sel_same_value({r,V}) when V =:= 42 ->
+ integer;
+sel_same_value({r,V}) when V =:= 42 ->
+ integer42;
+sel_same_value(_) ->
+ error.
+
+sel_same_value2(V) when V =:= 42 ->
+ integer42;
+sel_same_value2(V) when V =:= 42; V =:= 43 ->
+ integer43;
+sel_same_value2(_) ->
+ error.
+
+id(I) -> I.
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