%%
%% %CopyrightBegin%
%%
%% Copyright Ericsson AB 1999-2016. 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.
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%% %CopyrightEnd%
%%
%%
-module(guard_SUITE).
-export([all/0, suite/0,groups/0,init_per_group/2,end_per_group/2,
init_per_testcase/2,end_per_testcase/2,
init_per_suite/1,end_per_suite/1,
bad_arith/1,bad_tuple/1,test_heap_guards/1,guard_bifs/1,
type_tests/1,const_guard/1,
const_cond/1,basic_not/1,complex_not/1,
semicolon/1,complex_semicolon/1,comma/1,
or_guard/1,more_or_guards/1,
complex_or_guards/1,and_guard/1,
xor_guard/1,more_xor_guards/1,
old_guard_tests/1,
build_in_guard/1,gbif/1,
t_is_boolean/1,is_function_2/1,
tricky/1,rel_ops/1,
basic_andalso_orelse/1,traverse_dcd/1,
check_qlc_hrl/1,andalso_semi/1,t_tuple_size/1,binary_part/1,
bad_constants/1]).
-include_lib("common_test/include/ct.hrl").
-export([init/4]).
-import(lists, [member/2]).
suite() ->
[{ct_hooks,[ts_install_cth]},
{timetrap,{minutes,1}}].
all() ->
cases().
groups() ->
[].
init_per_group(_GroupName, Config) ->
Config.
end_per_group(_GroupName, Config) ->
Config.
cases() ->
[bad_arith, bad_tuple, test_heap_guards, guard_bifs,
type_tests, const_guard, const_cond, basic_not,
complex_not, semicolon, complex_semicolon, comma,
or_guard, more_or_guards, complex_or_guards, and_guard,
xor_guard, more_xor_guards, build_in_guard,
old_guard_tests, gbif, t_is_boolean, is_function_2,
tricky, rel_ops, basic_andalso_orelse, traverse_dcd,
check_qlc_hrl, andalso_semi, t_tuple_size, binary_part,
bad_constants].
init_per_testcase(_Case, Config) ->
test_lib:interpret(?MODULE),
Config.
end_per_testcase(_Case, _Config) ->
ok.
init_per_suite(Config) when is_list(Config) ->
test_lib:interpret(?MODULE),
true = lists:member(?MODULE, int:interpreted()),
Config.
end_per_suite(Config) when is_list(Config) ->
ok.
%% Test that a bad arithmetic operation in a guard works correctly.
bad_arith(Config) when list(Config) ->
5 = bad_arith1(2, 3),
10 = bad_arith1(1, infinity),
10 = bad_arith1(infinity, 1),
42 = bad_div(24, 0),
ok.
bad_arith1(T1, T2) when T1+T2 < 10 ->
T1+T2;
bad_arith1(_, _) ->
10.
bad_div(A, B) when A/B > 0 ->
A/B;
bad_div(A, B) when A div B > 0 ->
A div B;
bad_div(_A, _B) ->
42.
%% Test that bad arguments to element/2 are handled correctly.
bad_tuple(Config) when list(Config) ->
error = bad_tuple1(a),
error = bad_tuple1({a, b}),
x = bad_tuple1({x, b}),
y = bad_tuple1({a, b, y}),
ok.
bad_tuple1(T) when element(1, T) == x -> x;
bad_tuple1(T) when element(3, T) == y -> y;
bad_tuple1(_) -> error.
%% .
test_heap_guards(Config) when list(Config) ->
process_flag(trap_exit, true),
Tuple = {a, tuple, is, built, here, xxx},
List = [a, list, is, built, here],
try_fun(fun a_case/1, [Tuple], [Tuple]),
try_fun(fun a_case/1, [List], [List, List]),
try_fun(fun a_case/1, [a], [a]),
try_fun(fun an_if/1, [Tuple], [Tuple]),
try_fun(fun an_if/1, [List], [List, List]),
try_fun(fun an_if/1, [a], [a]),
try_fun(fun receive_test/1, [Tuple], [Tuple]),
try_fun(fun receive_test/1, [List], [List, List]),
try_fun(fun receive_test/1, [a], [a]),
ok.
a_case(V) ->
case V of
T when T == {a, tuple, is, built, here, xxx} ->
[T];
L when L == [a, list, is, built, here] ->
[L, L];
a ->
[a]
end.
an_if(V) ->
if
V == {a, tuple, is, built, here, xxx} ->
[V];
V == [a, list, is, built, here] ->
[V, V];
V == a ->
[a]
end.
receive_test(V) ->
self() ! V,
a_receive().
a_receive() ->
receive
T when T == {a, tuple, is, built, here, xxx} ->
[T];
L when L == [a, list, is, built, here] ->
[L, L];
a ->
[a]
end.
try_fun(Fun, Args, Result) ->
try_fun(16, Fun, Args, Result, []).
try_fun(0, _, _, _, _) ->
ok;
try_fun(Iter, Fun, Args, Result, Filler) ->
Pid = spawn_link(?MODULE, init, [self(),Fun,Args,list_to_tuple(Filler)]),
receive
{'EXIT',Pid,{result,Result}} ->
try_fun(Iter-1, Fun, Args, Result, [0|Filler]);
{'EXIT',Pid,{result,Other}} ->
io:format("Expected ~p; got ~p~n", [Result,Other]),
ct:fail(failed);
Other ->
ct:fail({unexpected_message,Other})
end.
init(_ReplyTo, Fun, Args, Filler) ->
Result = {result, apply(Fun, Args)},
dummy(Filler),
io:format("~p: result = ~p\n", [?LINE,Result]),
exit(Result).
dummy(_) ->
ok.
%% Test all guard bifs with nasty (but legal arguments).
guard_bifs(Config) when list(Config) ->
Big = -237849247829874297658726487367328971246284736473821617265433,
Float = 387924.874,
%% Succeding use of guard bifs.
try_gbif('abs/1', Big, -Big),
try_gbif('float/1', Big, float(Big)),
try_gbif('trunc/1', Float, 387924.0),
try_gbif('round/1', Float, 387925.0),
try_gbif('length/1', [], 0),
try_gbif('length/1', [a], 1),
try_gbif('length/1', [a, b], 2),
try_gbif('length/1', lists:seq(0, 31), 32),
try_gbif('hd/1', [a], a),
try_gbif('hd/1', [a, b], a),
try_gbif('tl/1', [a], []),
try_gbif('tl/1', [a, b], [b]),
try_gbif('tl/1', [a, b, c], [b, c]),
try_gbif('size/1', {}, 0),
try_gbif('size/1', {a}, 1),
try_gbif('size/1', {a, b}, 2),
try_gbif('size/1', {a, b, c}, 3),
try_gbif('size/1', list_to_binary([]), 0),
try_gbif('size/1', list_to_binary([1]), 1),
try_gbif('size/1', list_to_binary([1, 2]), 2),
try_gbif('size/1', list_to_binary([1, 2, 3]), 3),
try_gbif('element/2', {x}, {1, x}),
try_gbif('element/2', {x, y}, {1, x}),
try_gbif('element/2', {x, y}, {2, y}),
try_gbif('self/0', 0, self()),
try_gbif('node/0', 0, node()),
try_gbif('node/1', self(), node()),
%% Failing use of guard bifs.
try_fail_gbif('abs/1', Big, 1),
try_fail_gbif('abs/1', [], 1),
try_fail_gbif('float/1', Big, 42),
try_fail_gbif('float/1', [], 42),
try_fail_gbif('trunc/1', Float, 0.0),
try_fail_gbif('trunc/1', [], 0.0),
try_fail_gbif('round/1', Float, 1.0),
try_fail_gbif('round/1', [], a),
try_fail_gbif('length/1', [], 1),
try_fail_gbif('length/1', [a], 0),
try_fail_gbif('length/1', a, 0),
try_fail_gbif('length/1', {a}, 0),
try_fail_gbif('hd/1', [], 0),
try_fail_gbif('hd/1', [a], x),
try_fail_gbif('hd/1', x, x),
try_fail_gbif('tl/1', [], 0),
try_fail_gbif('tl/1', [a], x),
try_fail_gbif('tl/1', x, x),
try_fail_gbif('size/1', {}, 1),
try_fail_gbif('size/1', [], 0),
try_fail_gbif('size/1', [a], 1),
try_fail_gbif('element/2', {}, {1, x}),
try_fail_gbif('element/2', {x}, {1, y}),
try_fail_gbif('element/2', [], {1, z}),
try_fail_gbif('self/0', 0, list_to_pid("<0.0.0>")),
try_fail_gbif('node/0', 0, xxxx),
try_fail_gbif('node/1', self(), xxx),
try_fail_gbif('node/1', yyy, xxx),
ok.
try_gbif(Id, X, Y) ->
case guard_bif(Id, X, Y) of
{Id, X, Y} ->
io:format("guard_bif(~p, ~p, ~p) -- ok", [Id, X, Y]);
Other ->
ok = io:format("guard_bif(~p, ~p, ~p) -- bad result: ~p\n",
[Id, X, Y, Other]),
ct:fail(failed)
end.
try_fail_gbif(Id, X, Y) ->
case catch guard_bif(Id, X, Y) of
{'EXIT', {function_clause,[{?MODULE,guard_bif,[Id,X,Y],_}|_]}} ->
io:format("guard_bif(~p, ~p, ~p) -- ok", [Id,X,Y]);
Other ->
ok = io:format("guard_bif(~p, ~p, ~p) -- bad result: ~p\n",
[Id, X, Y, Other]),
ct:fail(failed)
end.
guard_bif('abs/1', X, Y) when abs(X) == Y ->
{'abs/1', X, Y};
guard_bif('float/1', X, Y) when float(X) == Y ->
{'float/1', X, Y};
guard_bif('trunc/1', X, Y) when trunc(X) == Y ->
{'trunc/1', X, Y};
guard_bif('round/1', X, Y) when round(X) == Y ->
{'round/1', X, Y};
guard_bif('length/1', X, Y) when length(X) == Y ->
{'length/1', X, Y};
guard_bif('hd/1', X, Y) when hd(X) == Y ->
{'hd/1', X, Y};
guard_bif('tl/1', X, Y) when tl(X) == Y ->
{'tl/1', X, Y};
guard_bif('size/1', X, Y) when size(X) == Y ->
{'size/1', X, Y};
guard_bif('element/2', X, {Pos, Expected}) when element(Pos, X) == Expected ->
{'element/2', X, {Pos, Expected}};
guard_bif('self/0', X, Y) when self() == Y ->
{'self/0', X, Y};
guard_bif('node/0', X, Y) when node() == Y ->
{'node/0', X, Y};
guard_bif('node/1', X, Y) when node(X) == Y ->
{'node/1', X, Y}.
%% Test the type tests.
type_tests(Config) when list(Config) ->
Types = all_types(),
Tests = type_test_desc(),
put(errors, 0),
put(violations, 0),
type_tests(Tests, Types),
case {get(errors), get(violations)} of
{0, 0} ->
ok;
{0, N} ->
{comment, integer_to_list(N) ++ " standard violation(s)"};
{Errors, Violations} ->
io:format("~p sub test(s) failed, ~p violation(s)",
[Errors, Violations]),
ct:fail(failed)
end.
type_tests([{Test, AllowedTypes}| T], AllTypes) ->
type_tests(Test, AllTypes, AllowedTypes),
type_tests(T, AllTypes);
type_tests([], _) ->
ok.
type_tests(Test, [Type|T], Allowed) ->
{TypeTag, Value} = Type,
case member(TypeTag, Allowed) of
true ->
case catch type_test(Test, Value) of
Test ->
ok;
_Other ->
io:format("Test ~p(~p) failed", [Test, Value]),
put(errors, get(errors) + 1)
end;
false ->
case catch type_test(Test, Value) of
{'EXIT',{function_clause,
[{?MODULE,type_test,[Test,Value],_}|_]}} ->
ok;
{'EXIT',Other} ->
ct:fail({unexpected_error_reason,Other});
tuple when function(Value) ->
io:format("Standard violation: Test ~p(~p) should fail",
[Test, Value]),
put(violations, get(violations) + 1);
_Other ->
io:format("Test ~p(~p) succeeded (should fail)", [Test, Value]),
put(errors, get(errors) + 1)
end
end,
type_tests(Test, T, Allowed);
type_tests(_, [], _) ->
ok.
all_types() ->
[{small, 42},
{big, 392742928742947293873938792874019287447829874290742},
{float, 3.14156},
{nil, []},
{cons, [a]},
{tuple, {a, b}},
{atom, xxxx},
{ref, make_ref()},
{pid, self()},
{port, open_port({spawn, efile}, [])},
{function, fun(X) -> X+1, "" end},
{binary, list_to_binary([])}].
type_test_desc() ->
[{integer, [small, big]},
{float, [float]},
{number, [small, big, float]},
{atom, [atom]},
{list, [cons, nil]},
{nonempty_list, [cons]},
{nil, [nil]},
{tuple, [tuple]},
{pid, [pid]},
{port, [port]},
{reference, [ref]},
{function, [function]}].
type_test(integer, X) when integer(X) ->
integer;
type_test(float, X) when float(X) ->
float;
type_test(number, X) when number(X) ->
number;
type_test(atom, X) when atom(X) ->
atom;
type_test(list, X) when list(X) ->
list;
type_test(nonempty_list, [_]) ->
nonempty_list;
type_test(nil, []) ->
nil;
type_test(tuple, X) when tuple(X) ->
tuple;
type_test(pid, X) when pid(X) ->
pid;
type_test(reference, X) when reference(X) ->
reference;
type_test(port, X) when port(X) ->
port;
type_test(binary, X) when binary(X) ->
binary;
type_test(function, X) when function(X) ->
function.
const_guard(Config) when is_list(Config) ->
if
(0 == 0) and ((0 == 0) or (0 == 0)) ->
ok
end.
const_cond(Config) when is_list(Config) ->
ok = const_cond({}, 0),
ok = const_cond({a}, 1),
error = const_cond({a,b}, 3),
error = const_cond({a}, 0),
error = const_cond({a,b}, 1),
ok.
const_cond(T, Sz) ->
case T of
_X when false -> never;
_X when tuple(T), eq == eq, size(T) == Sz -> ok;
_X when tuple(T), eq == leq, size(T) =< Sz -> ok;
_X -> error
end.
basic_not(Config) when is_list(Config) ->
True = id(true),
False = id(false),
Glurf = id(glurf),
A = id(5),
B = id(37.5),
C = id(-1),
D = id(5),
ATuple = {False,True,Glurf},
check(fun() -> if not false -> ok; true -> error end end, ok),
check(fun() -> if not true -> ok; true -> error end end, error),
check(fun() -> if not False -> ok; true -> error end end, ok),
check(fun() -> if not True -> ok; true -> error end end, error),
check(fun() -> if A > B -> gt; A < B -> lt; A == B -> eq end end, lt),
check(fun() -> if A > C -> gt; A < C -> lt; A == C -> eq end end, gt),
check(fun() -> if A > D -> gt; A < D -> lt; A == D -> eq end end, eq),
check(fun() -> if not (7 > 453) -> le; not (7 < 453) -> ge;
not (7 == 453) -> ne; true -> eq end end, le),
check(fun() -> if not (7 > -8) -> le; not (7 < -8) -> ge;
not (7 == -8) -> ne; true -> eq end end, ge),
check(fun() -> if not (7 > 7) -> le; not (7 < 7) -> ge;
not (7 == 7) -> ne; true -> eq end end, le),
check(fun() -> if not (A > B) -> le; not (A < B) -> ge;
not (A == B) -> ne; true -> eq end end, le),
check(fun() -> if not (A > C) -> le; not (A < C) -> ge;
not (A == C) -> ne; true -> eq end end, ge),
check(fun() -> if not (A > D) -> le; not (A < D) -> ge;
not (A == D) -> ne; true -> eq end end, le),
check(fun() -> if not element(1, ATuple) -> ok; true -> error end end, ok),
check(fun() -> if not element(2, ATuple) -> ok; true -> error end end, error),
check(fun() -> if not element(3, ATuple) -> ok; true -> error end end, error),
check(fun() -> if not glurf -> ok; true -> error end end, error),
check(fun() -> if not Glurf -> ok; true -> error end end, error),
ok.
complex_not(Config) when is_list(Config) ->
ATuple = id({false,true,gurka}),
check(fun() -> if not(element(1, ATuple)) -> ok; true -> error end end, ok),
check(fun() -> if not(element(2, ATuple)) -> ok; true -> error end end, error),
check(fun() -> if not(element(3, ATuple) == gurka) -> ok;
true -> error end end, error),
check(fun() -> if not(element(3, ATuple) =/= gurka) -> ok;
true -> error end end, ok),
check(fun() -> if {a,not(element(2, ATuple))} == {a,false} -> ok;
true -> error end end, ok),
check(fun() -> if {a,not(element(1, ATuple))} == {a,false} -> ok;
true -> error end end, error),
check(fun() -> if not(element(1, ATuple) or element(3, ATuple)) -> ok;
true -> error end end, error),
%% orelse
check(fun() -> if not(element(1, ATuple) orelse element(3, ATuple)) -> ok;
true -> error end end, error),
ok.
semicolon(Config) when is_list(Config) ->
%% True/false combined using ';' (literal atoms).
check(fun() -> if true; false -> ok end end, ok),
check(fun() -> if false; true -> ok end end, ok),
check(fun() -> if true; true -> ok end end, ok),
check(fun() -> if false; false -> ok; true -> error end end, error),
check(fun() ->
{'EXIT',{if_clause,_}} = (catch if false; false -> ok end),
exit
end, exit),
%% True/false combined used ';'.
True = id(true),
False = id(false),
check(fun() -> if True; False -> ok end end, ok),
check(fun() -> if False; True -> ok end end, ok),
check(fun() -> if True; True -> ok end end, ok),
check(fun() -> if False; False -> ok; true -> error end end, error),
check(fun() ->
{'EXIT',{if_clause,_}} = (catch if False; False -> ok end),
exit
end, exit),
%% Combine true/false with a non-boolean value.
Glurf = id(glurf),
check(fun() -> if True; Glurf -> ok end end, ok),
check(fun() -> if Glurf; True -> ok end end, ok),
check(fun() -> if Glurf; Glurf -> ok; true -> error end end, error),
check(fun() -> if False; Glurf -> ok; true -> error end end, error),
check(fun() -> if Glurf; False -> ok; true -> error end end, error),
check(fun() ->
{'EXIT',{if_clause,_}} = (catch if Glurf; Glurf -> ok end),
exit
end, exit),
%% Combine true/false with errors.
ATuple = id({false,true,gurka}),
check(fun() -> if True; element(42, ATuple) -> ok end end, ok),
check(fun() -> if element(42, ATuple); True -> ok end end, ok),
check(fun() -> if element(42, ATuple); element(42, ATuple) -> ok;
true -> error end end, error),
check(fun() -> if False; element(42, ATuple) -> ok;
true -> error end end, error),
check(fun() -> if element(42, ATuple);
False -> ok; true -> error end end, error),
check(fun() ->
{'EXIT',{if_clause,_}} =
(catch if element(42, ATuple);
element(42, ATuple) -> ok end),
exit
end, exit),
ok.
complex_semicolon(Config) when is_list(Config) ->
ok = csemi1(int, {blurf}),
ok = csemi1(string, {blurf}),
ok = csemi1(float, [a]),
error = csemi1(35, 42),
%% 2
ok = csemi2({}, {a,b,c}),
ok = csemi2({1,3.5}, {a,b,c}),
ok = csemi2(dum, {a,b,c}),
ok = csemi2({45,-19.3}, {}),
ok = csemi2({45,-19.3}, {dum}),
ok = csemi2({45,-19.3}, {dum,dum}),
error = csemi2({45}, {dum}),
error = csemi2([], {dum}),
error = csemi2({dum}, []),
error = csemi2([], []),
%% 3
csemi3(fun csemi3a/4),
csemi3(fun csemi3b/4),
csemi3(fun csemi3c/4),
%% 4
csemi4(fun csemi4a/4),
csemi4(fun csemi4b/4),
csemi4(fun csemi4c/4),
csemi4(fun csemi4d/4),
%% 4, 'orelse' instead of 'or'
csemi4_orelse(fun csemi4_orelse_a/4),
csemi4_orelse(fun csemi4_orelse_b/4),
csemi4_orelse(fun csemi4_orelse_c/4),
csemi4_orelse(fun csemi4_orelse_d/4),
ok.
csemi1(Type, Val) when is_list(Val), Type == float;
Type == int; Type == string -> ok;
csemi1(_, _) -> error.
csemi2(A, B) when size(A) > 1; size(B) > 2 -> ok;
csemi2(_, _) -> error.
csemi3(Csemi3) ->
ok = Csemi3({}, {a,b,c}, [0], [0]),
ok = Csemi3({1,3.5}, {a,b,c}, -1, -1),
ok = Csemi3(dum, {a,b,c}, 0.0, 0.0),
ok = Csemi3(dum, {c}, b, a),
ok = Csemi3(dum, <<1,2,3>>, 0.0, 0.0),
ok = Csemi3(<<3.5/float>>, {a,b,c}, -1, -1),
ok = Csemi3({45,-19.3}, {}, [], []),
ok = Csemi3({45,-19.3}, {dum}, 42, 42),
ok = Csemi3({45,-19.3}, {dum,dum}, 33, 33),
ok = Csemi3({45}, {dum}, 1.0, 0),
ok = Csemi3([a], {dum}, 1.0, 0),
ok = Csemi3({dum}, [], 1.0, 0),
ok = Csemi3([], [], 1.0, 0),
ok = Csemi3(blurf, {dum}, 1.0, 0),
ok = Csemi3({a}, blurf, 1.0, 0),
ok = Csemi3([a], [dum], 1.0, 0),
ok = Csemi3({dum}, [], 1.0, 0),
ok = Csemi3([], [], 1.0, 0),
error = Csemi3({45}, {dum}, 0, 0),
error = Csemi3([a], {dum}, 0, 0),
error = Csemi3({dum}, [], 0, 0),
error = Csemi3([], [], 0, 0),
ok.
csemi3a(A, B, X, Y) when X > Y; size(A) > 1; size(B) > 2 -> ok;
csemi3a(_, _, _, _) -> error.
csemi3b(A, B, X, Y) when size(A) > 1; X > Y; size(B) > 2 -> ok;
csemi3b(_, _, _, _) -> error.
csemi3c(A, B, X, Y) when size(A) > 1; size(B) > 2; X > Y -> ok;
csemi3c(_, _, _, _) -> error.
csemi4(Test) ->
ok = Test({a,b}, 2, {c,d}, 2),
ok = Test({1,2,3}, 0, [], 0),
ok = Test({}, 2, blurf, 0),
ok = Test({}, 2, {1}, 2),
error = Test([], 4, {}, 0),
error = Test({}, 0, [a,b], 4),
error = Test({}, 0, [a,b], 0),
error = Test([], 0, {}, 0),
error = Test({}, 0, {}, 0),
ok.
csemi4a(A, X, B, Y) when (size(A) > 1) or (X > 1);
(size(B) > 1) or (Y > 1) -> ok;
csemi4a(_, _, _, _) -> error.
csemi4b(A, X, B, Y) when (X > 1) or (size(A) > 1);
(size(B) > 1) or (Y > 1) -> ok;
csemi4b(_, _, _, _) -> error.
csemi4c(A, X, B, Y) when (size(A) > 1) or (X > 1);
(Y > 1) or (size(B) > 1) -> ok;
csemi4c(_, _, _, _) -> error.
csemi4d(A, X, B, Y) when (X > 1) or (size(A) > 1);
(Y > 1) or (size(B) > 1) -> ok;
csemi4d(_, _, _, _) -> error.
csemi4_orelse(Test) ->
ok = Test({a,b}, 2, {c,d}, 2),
ok = Test({1,2,3}, 0, [], 0),
ok = Test({}, 2, blurf, 0),
ok = Test({}, 2, {1}, 2),
error = Test([], 1, {}, 0),
ok.
csemi4_orelse_a(A, X, B, Y) when (size(A) > 1) orelse (X > 1);
(size(B) > 1) orelse (Y > 1) -> ok;
csemi4_orelse_a(_, _, _, _) -> error.
csemi4_orelse_b(A, X, B, Y) when (X > 1) orelse (size(A) > 1);
(size(B) > 1) orelse (Y > 1) -> ok;
csemi4_orelse_b(_, _, _, _) -> error.
csemi4_orelse_c(A, X, B, Y) when (size(A) > 1) orelse (X > 1);
(Y > 1) orelse (size(B) > 1) -> ok;
csemi4_orelse_c(_, _, _, _) -> error.
csemi4_orelse_d(A, X, B, Y) when (X > 1) or (size(A) > 1);
(Y > 1) or (size(B) > 1) -> ok;
csemi4_orelse_d(_, _, _, _) -> error.
comma(Config) when is_list(Config) ->
%% ',' combinations of literal true/false.
check(fun() -> if true, false -> ok; true -> error end end, error),
check(fun() -> if false, true -> ok; true -> error end end, error),
check(fun() -> if true, true -> ok end end, ok),
check(fun() -> if false, false -> ok; true -> error end end, error),
check(fun() ->
{'EXIT',{if_clause,_}} =
(catch if true, false -> ok;
false, true -> ok;
false, false -> ok
end),
exit
end, exit),
%% ',' combinations of true/false in variables.
True = id(true),
False = id(false),
check(fun() -> if True, False -> ok; true -> error end end, error),
check(fun() -> if False, True -> ok; true -> error end end, error),
check(fun() -> if True, True -> ok end end, ok),
check(fun() -> if False, False -> ok; true -> error end end, error),
check(fun() ->
{'EXIT',{if_clause,_}} =
(catch if True, False -> ok;
False, True -> ok;
False, False -> ok
end),
exit
end, exit),
%% ',' combinations of true/false, and non-boolean in variables.
Glurf = id(glurf),
check(fun() -> if True, Glurf -> ok; true -> error end end, error),
check(fun() -> if Glurf, True -> ok; true -> error end end, error),
check(fun() -> if True, True -> ok end end, ok),
check(fun() -> if Glurf, Glurf -> ok; true -> error end end, error),
check(fun() ->
{'EXIT',{if_clause,_}} =
(catch if True, Glurf -> ok;
Glurf, True -> ok;
Glurf, Glurf -> ok
end),
exit
end, exit),
%% ',' combinations of true/false with errors.
ATuple = id({a,b,c}),
check(fun() -> if True, element(42, ATuple) -> ok;
true -> error end end, error),
check(fun() -> if element(42, ATuple), True -> ok;
true -> error end end, error),
check(fun() -> if True, True -> ok end end, ok),
check(fun() -> if element(42, ATuple), element(42, ATuple) -> ok;
true -> error end end, error),
check(fun() ->
{'EXIT',{if_clause,_}} =
(catch if True, element(42, ATuple) -> ok;
element(42, ATuple), True -> ok;
element(42, ATuple), element(42, ATuple) -> ok
end),
exit
end, exit),
ok.
or_guard(Config) when is_list(Config) ->
True = id(true),
False = id(false),
Glurf = id(glurf),
%% 'or' combinations of literal true/false.
check(fun() -> if true or false -> ok end end, ok),
check(fun() -> if false or true -> ok end end, ok),
check(fun() -> if true or true -> ok end end, ok),
check(fun() -> if false or false -> ok; true -> error end end, error),
check(fun() -> if glurf or true -> ok; true -> error end end, error),
check(fun() -> if true or glurf -> ok; true -> error end end, error),
check(fun() -> if glurf or glurf -> ok; true -> error end end, error),
check(fun() ->
{'EXIT',{if_clause,_}} = (catch if false or false -> ok end),
exit
end, exit),
%% 'or' combinations using variables containing true/false.
check(fun() -> if True or False -> ok end end, ok),
check(fun() -> if False or True -> ok end end, ok),
check(fun() -> if True or True -> ok end end, ok),
check(fun() -> if False or False -> ok; true -> error end end, error),
check(fun() -> if True or Glurf -> ok; true -> error end end, error),
check(fun() -> if Glurf or True -> ok; true -> error end end, error),
check(fun() -> if Glurf or Glurf -> ok; true -> error end end, error),
check(fun() ->
{'EXIT',{if_clause,_}} = (catch if False or False -> ok end),
exit
end, exit),
ok.
more_or_guards(Config) when is_list(Config) ->
True = id(true),
False = id(false),
ATuple = id({false,true,gurka}),
check(fun() ->
if element(42, ATuple) or False -> ok;
true -> error end
end, error),
check(fun() ->
if False or element(42, ATuple) -> ok;
true -> error end
end, error),
check(fun() ->
if element(18, ATuple) or element(42, ATuple) -> ok;
true -> error end
end, error),
check(fun() ->
if True or element(42, ATuple) -> ok;
true -> error end
end, error),
check(fun() ->
if element(42, ATuple) or True -> ok;
true -> error end
end, error),
check(fun() ->
if element(1, ATuple) or element(42, ATuple) or True -> ok;
true -> error end
end, error),
check(fun() ->
if element(1, ATuple) or True or element(42, ATuple) -> ok;
true -> error end
end, error),
check(fun() ->
if
(<<False:8>> == <<0>>) or element(2, ATuple) -> ok;
true -> error end
end, error),
check(fun() ->
if
element(2, ATuple) or (<<True:8>> == <<1>>) -> ok;
true -> error end
end, error),
check(fun() ->
if element(2, ATuple) or element(42, ATuple) -> ok;
true -> error end
end, error),
check(fun() ->
if
element(1, ATuple) or
element(2, ATuple) or
element(19, ATuple) -> ok;
true -> error end
end, error),
ok.
complex_or_guards(Config) when is_list(Config) ->
%% complex_or_1/2
ok = complex_or_1({a,b,c,d}, {1,2,3}),
ok = complex_or_1({a,b,c,d}, {1}),
ok = complex_or_1({a}, {1,2,3}),
error = complex_or_1({a}, {1}),
error = complex_or_1(1, 2),
error = complex_or_1([], {a,b,c,d}),
error = complex_or_1({a,b,c,d}, []),
%% complex_or_2/1
ok = complex_or_2({true,{}}),
ok = complex_or_2({false,{a}}),
ok = complex_or_2({false,{a,b,c}}),
ok = complex_or_2({true,{a,b,c,d}}),
error = complex_or_2({blurf,{a,b,c}}),
error = complex_or_2({true}),
error = complex_or_2({true,no_tuple}),
error = complex_or_2({true,[]}),
%% complex_or_3/2
ok = complex_or_3({true}, {}),
ok = complex_or_3({false}, {a}),
ok = complex_or_3({false}, {a,b,c}),
ok = complex_or_3({true}, {a,b,c,d}),
ok = complex_or_3({false}, <<1,2,3>>),
ok = complex_or_3({true}, <<1,2,3,4>>),
error = complex_or_3(blurf, {a,b,c}),
error = complex_or_3({false}, <<1,2,3,4>>),
error = complex_or_3([], <<1,2>>),
error = complex_or_3({true}, 45),
error = complex_or_3(<<>>, <<>>),
%% complex_or_4/2
ok = complex_or_4(<<1,2,3>>, {true}),
ok = complex_or_4(<<1,2,3>>, {false}),
ok = complex_or_4(<<1,2,3>>, {true}),
ok = complex_or_4({1,2,3}, {true}),
error = complex_or_4({1,2,3,4}, {false}),
error = complex_or_4(<<1,2,3,4>>, []),
error = complex_or_4([], {true}),
%% complex_or_5/2
ok = complex_or_5(<<1>>, {false}),
ok = complex_or_5(<<1,2,3>>, {true}),
ok = complex_or_5(<<1,2,3,4>>, {false}),
ok = complex_or_5({1,2,3}, {false}),
ok = complex_or_5({1,2,3,4}, {false}),
error = complex_or_5(blurf, {false}),
error = complex_or_5(<<1>>, klarf),
error = complex_or_5(blurf, klarf),
%% complex_or_6/2
ok = complex_or_6({true,true}, {1,2,3,4}),
ok = complex_or_6({true,true}, <<1,2,3,4>>),
ok = complex_or_6({false,false}, <<1,2,3,4>>),
ok = complex_or_6({false,true}, <<1>>),
ok = complex_or_6({true,false}, {1}),
ok = complex_or_6({true,true}, {1}),
error = complex_or_6({false,false}, {1}),
error = complex_or_6({true}, {1,2,3,4}),
error = complex_or_6({}, {1,2,3,4}),
error = complex_or_6([], {1,2,3,4}),
error = complex_or_6([], {1,2,3,4}),
error = complex_or_6({true,false}, klurf),
ok.
complex_or_1(A, B) ->
if
((3 < size(A)) and (size(A) < 9)) or
((2 < size(B)) and (size(B) < 7)) -> ok;
true -> error
end.
complex_or_2(Tuple) ->
if
element(1, Tuple) or not (size(element(2, Tuple)) > 3) -> ok;
true -> error
end.
complex_or_3(A, B) ->
if
not (size(B) > 3) or element(1, A) -> ok;
true -> error
end.
complex_or_4(A, B) ->
if
not (is_tuple(A) and (size(A) > 3)) or element(1, B) -> ok;
true -> error
end.
complex_or_5(A, B) ->
if
not (is_tuple(A) or (size(A) > 3)) or not element(1, B) -> ok;
true -> error
end.
complex_or_6(A, B) ->
if
not (not element(1, A) and not element(2, A)) or
not (not (size(B) > 3)) -> ok;
true -> error
end.
and_guard(Config) when is_list(Config) ->
%% 'and' combinations of literal true/false.
check(fun() -> if true and false -> ok; true -> error end end, error),
check(fun() -> if false and true -> ok; true -> error end end, error),
check(fun() -> if true and true -> ok end end, ok),
check(fun() -> if false and false -> ok; true -> error end end, error),
check(fun() -> if glurf and true -> ok; true -> error end end, error),
check(fun() -> if true and glurf -> ok; true -> error end end, error),
check(fun() -> if glurf and glurf -> ok; true -> error end end, error),
check(fun() ->
{'EXIT',{if_clause,_}} =
(catch if true and false -> ok;
false and true -> ok;
false and false -> ok
end),
exit
end, exit),
%% 'and' combinations of true/false in variables.
True = id(true),
False = id(false),
check(fun() -> if True and False -> ok; true -> error end end, error),
check(fun() -> if False and True -> ok; true -> error end end, error),
check(fun() -> if True and True -> ok end end, ok),
check(fun() -> if False and False -> ok; true -> error end end, error),
check(fun() ->
{'EXIT',{if_clause,_}} =
(catch if True and False -> ok;
False and True -> ok;
False and False -> ok
end),
exit
end, exit),
%% 'and' combinations of true/false and a non-boolean in variables.
Glurf = id(glurf),
check(fun() -> if True and Glurf -> ok; true -> error end end, error),
check(fun() -> if Glurf and True -> ok; true -> error end end, error),
check(fun() -> if True and True -> ok end end, ok),
check(fun() -> if Glurf and Glurf -> ok; true -> error end end, error),
check(fun() ->
{'EXIT',{if_clause,_}} =
(catch if True and Glurf -> ok;
Glurf and True -> ok;
Glurf and Glurf -> ok
end),
exit
end, exit),
%% 'and' combinations of true/false with errors.
ATuple = id({a,b,c}),
check(fun() -> if True and element(42, ATuple) -> ok;
true -> error end end, error),
check(fun() -> if element(42, ATuple) and True -> ok;
true -> error end end, error),
check(fun() -> if True and True -> ok end end, ok),
check(fun() -> if element(42, ATuple) and element(42, ATuple) -> ok;
true -> error end end, error),
check(fun() ->
{'EXIT',{if_clause,_}} =
(catch if True and element(42, ATuple) -> ok;
element(42, ATuple) and True -> ok;
element(42, ATuple) and element(42, ATuple) -> ok
end),
exit
end, exit),
ok = relprod({'Set',a,b}, {'Set',a,b}),
ok.
relprod(R1, R2) when (erlang:size(R1) =:= 3) and (erlang:element(1,R1) =:= 'Set'), (erlang:size(R2) =:= 3) and (erlang:element(1,R2) =:= 'Set') ->
ok.
xor_guard(Config) when is_list(Config) ->
%% 'xor' combinations of literal true/false.
check(fun() -> if true xor false -> ok end end, ok),
check(fun() -> if false xor true -> ok end end, ok),
check(fun() -> if true xor true -> ok; true -> error end end, error),
check(fun() -> if false xor false -> ok; true -> error end end, error),
check(fun() ->
{'EXIT',{if_clause,_}} = (catch if false xor false -> ok end),
exit
end, exit),
check(fun() ->
{'EXIT',{if_clause,_}} = (catch if true xor true -> ok end),
exit
end, exit),
%% 'xor' combinations using variables containing true/false.
True = id(true),
False = id(false),
check(fun() -> if True xor False -> ok end end, ok),
check(fun() -> if False xor True -> ok end end, ok),
check(fun() -> if True xor True -> ok; true -> error end end, error),
check(fun() -> if False xor False -> ok; true -> error end end, error),
check(fun() ->
{'EXIT',{if_clause,_}} = (catch if False xor False -> ok end),
exit
end, exit),
check(fun() ->
{'EXIT',{if_clause,_}} = (catch if True xor True -> ok end),
exit
end, exit),
ok.
more_xor_guards(Config) when is_list(Config) ->
True = id(true),
False = id(false),
ATuple = id({false,true,gurka}),
check(fun() ->
if element(42, ATuple) xor False -> ok;
true -> error end
end, error),
check(fun() ->
if False xor element(42, ATuple) xor False -> ok;
true -> error end
end, error),
check(fun() ->
if element(18, ATuple) xor element(42, ATuple) -> ok;
true -> error end
end, error),
check(fun() ->
if True xor element(42, ATuple) -> ok;
true -> error end
end, error),
check(fun() ->
if element(42, ATuple) xor True -> ok;
true -> error end
end, error),
ok.
build_in_guard(Config) when is_list(Config) ->
SubBin = <<5.0/float>>,
B = <<1,SubBin/binary,3.5/float>>,
if
B =:= <<1,SubBin/binary,3.5/float>> -> ok
end.
old_guard_tests(Config) when list(Config) ->
%% Check that all the old guard tests are still recognized.
list = og(Config),
atom = og(an_atom),
binary = og(<<1,2>>),
float = og(3.14),
integer = og(43),
a_function = og(fun() -> ok end),
pid = og(self()),
reference = og(make_ref()),
tuple = og({}),
number = on(45.333),
number = on(-19),
ok.
og(V) when atom(V) -> atom;
og(V) when binary(V) -> binary;
og(V) when float(V) -> float;
og(V) when integer(V) -> integer;
og(V) when function(V) -> a_function;
og(V) when list(V) -> list;
og(V) when pid(V) -> pid;
og(V) when port(V) -> port;
og(V) when reference(V) -> reference;
og(V) when tuple(V) -> tuple;
og(_) -> what.
on(V) when number(V) -> number;
on(_) -> not_number.
gbif(Config) when is_list(Config) ->
error = gbif_1(1, {false,true}),
ok = gbif_1(2, {false,true}),
ok.
gbif_1(P, T) when element(P, T) -> ok;
gbif_1(_, _) -> error.
t_is_boolean(Config) when is_list(Config) ->
true = is_boolean(true),
true = is_boolean(false),
true = is_boolean(id(true)),
true = is_boolean(id(false)),
false = is_boolean(glurf),
false = is_boolean(id(glurf)),
false = is_boolean([]),
false = is_boolean(id([])),
false = is_boolean(42),
false = is_boolean(id(-42)),
false = is_boolean(math:pi()),
false = is_boolean(384793478934378924978439789873478934897),
false = is_boolean(id(self())),
false = is_boolean(id({x,y,z})),
false = is_boolean(id([a,b,c])),
false = is_boolean(id(make_ref())),
false = is_boolean(id(<<1,2,3>>)),
ok = bool(true),
ok = bool(false),
ok = bool(id(true)),
ok = bool(id(false)),
error = bool(glurf),
error = bool(id(glurf)),
error = bool([]),
error = bool(id([])),
error = bool(42),
error = bool(id(-42)),
error = bool(math:pi()),
error = bool(384793478934378924978439789873478934897),
error = bool(id(self())),
error = bool(id({x,y,z})),
error = bool(id([a,b,c])),
error = bool(id(make_ref())),
error = bool(id(<<1,2,3>>)),
ok.
bool(X) when is_boolean(X) -> ok;
bool(_) -> error.
is_function_2(Config) when is_list(Config) ->
true = is_function(id(fun ?MODULE:all/1), 1),
true = is_function(id(fun() -> ok end), 0),
false = is_function(id(fun ?MODULE:all/1), 0),
false = is_function(id(fun() -> ok end), 1),
F = fun(_) -> ok end,
if
is_function(F, 1) -> ok
end.
tricky(Config) when is_list(Config) ->
not_ok = tricky_1(1, 2),
not_ok = tricky_1(1, blurf),
not_ok = tricky_1(foo, 2),
not_ok = tricky_1(a, b),
false = rb(100000, [1], 42),
true = rb(100000, [], 42),
true = rb(555, [a,b,c], 19),
ok.
tricky_1(X, Y) when abs((X == 1) or (Y == 2)) -> ok;
tricky_1(_, _) -> not_ok.
%% From dets_v9:read_buckets/11, simplified.
rb(Size, ToRead, SoFar) when SoFar + Size < 81920; ToRead == [] -> true;
rb(_, _, _) -> false.
-define(T(Op,A,B),
ok = if A Op B -> ok; true -> error end,
ok = if not (A Op B) -> error; true -> ok end,
(fun(X, Y, True, False) ->
ok = if X Op Y -> ok; true -> error end,
ok = if False; X Op Y; False -> ok; true -> error end,
ok = if X Op Y, True -> ok; true -> error end,
ok = if not (X Op Y) -> error; true -> ok end,
ok = if False; not (X Op Y); False -> error; true -> ok end
end)(id(A), id(B), id(true), id(false))).
-define(F(Op,A,B),
ok = if A Op B -> error; true -> ok end,
ok = if not (A Op B) -> ok; true -> error end,
(fun(X, Y, True, False) ->
ok = if X Op Y -> error; true -> ok end,
ok = if False; X Op Y; False -> error; true -> ok end,
ok = if not (X Op Y); False -> ok; true -> error end,
ok = if not (X Op Y), True -> ok; true -> error end
end)(id(A), id(B), id(true), id(false))).
rel_ops(Config) when is_list(Config) ->
?T(=/=, 1, 1.0),
?F(=/=, 2, 2),
?F(=/=, {a}, {a}),
?F(/=, a, a),
?F(/=, 0, 0.0),
?T(/=, 0, 1),
?F(/=, {a}, {a}),
?T(==, 1, 1.0),
?F(==, a, {}),
?F(=:=, 1, 1.0),
?T(=:=, 42.0, 42.0),
?F(>, a, b),
?T(>, 42, 1.0),
?F(>, 42, 42.0),
?T(<, a, b),
?F(<, 42, 1.0),
?F(<, 42, 42.0),
?T(=<, 1.5, 5),
?F(=<, -9, -100.344),
?T(=<, 42, 42.0),
?T(>=, 42, 42.0),
?F(>=, a, b),
?T(>=, 1.0, 0),
ok.
-undef(TestOp).
basic_andalso_orelse(Config) when is_list(Config) ->
T = id({type,integers,23,42}),
65 = if
((element(1, T) =:= type) andalso (size(T) =:= 4) andalso
element(2, T) == integers) ->
element(3, T) + element(4, T);
true -> error
end,
65 = case [] of
[] when ((element(1, T) =:= type) andalso (size(T) =:= 4) andalso
element(2, T) == integers) ->
element(3, T) + element(4, T)
end,
42 = basic_rt({type,integers,40,2}),
5.0 = basic_rt({vector,{3.0,4.0}}),
20 = basic_rt(['+',3,7]),
{'Set',a,b} = basic_rt({{'Set',a,b},{'Set',a,b}}),
12 = basic_rt({klurf,4}),
error = basic_rt({type,integers,40,2,3}),
error = basic_rt({kalle,integers,40,2}),
error = basic_rt({kalle,integers,40,2}),
error = basic_rt({1,2}),
error = basic_rt([]),
RelProdBody =
fun(R1, R2) ->
if
(erlang:size(R1) =:= 3) andalso (erlang:element(1,R1) =:= 'Set'),
(erlang:size(R2) =:= 3) andalso (erlang:element(1,R2) =:= 'Set') ->
ok
end
end,
ok = RelProdBody({'Set',a,b}, {'Set',a,b}),
ok.
basic_rt(T) when is_tuple(T) andalso size(T) =:= 4 andalso element(1, T) =:= type andalso
element(2, T) == integers ->
element(3, T) + element(4, T);
basic_rt(T) when is_tuple(T) andalso size(T) =:= 2 andalso element(1, T) =:= vector ->
{X,Y} = element(2, T),
if
is_float(X), is_float(Y) ->
math:sqrt(X*X+Y*Y)
end;
basic_rt(['+',A,B]) ->
2*id(A+B);
basic_rt({R1,R2}) when erlang:size(R1) =:= 3 andalso erlang:element(1,R1) =:= 'Set',
erlang:size(R2) =:= 3 andalso erlang:element(1,R2) =:= 'Set' ->
R1 = id(R1),
R2 = id(R2),
R1;
basic_rt(T) when is_tuple(T) andalso size(T) =:= 2 andalso element(1, T) =:= klurf ->
3*id(element(2, T));
basic_rt(_) ->
error.
traverse_dcd(Config) when is_list(Config) ->
L0 = [{log_header,dcd_log,"1.0",a,b,c},{log_header,dcd_log,"2.0",a,b,c},
{log_header,dcd_log,"0.0",a,b,c},blurf],
{cont,[{log_header,dcd_log,"0.0",a,b,c},blurf],log,funny} =
traverse_dcd({cont,L0}, log, funny),
L1 = [{log_header,dcd_log,"1.0"}],
{cont,L1,log,funny} = traverse_dcd({cont,L1}, log, funny),
L2 = [{a,tuple}],
{cont,L2,log,funny} = traverse_dcd({cont,L2}, log, funny),
ok.
%% The function starts out with 3 arguments in {x,0}, {x,1}, {x,2}.
%% The outer match of a two tuple will places the first element in {x,3} and
%% second in {x,4}. The guard for the first clause must make ensure that all of those
%% registers are restored befor entering the second clause.
%%
%% (From mnesia_checkpoint.erl, modified.)
traverse_dcd({Cont,[LogH|Rest]},Log,Fun)
when is_tuple(LogH) andalso size(LogH) =:= 6 andalso element(1, LogH) =:= log_header
andalso erlang:element(2,LogH) == dcd_log,
is_tuple(LogH) andalso size(LogH) =:= 6 andalso element(1, LogH) =:= log_header
andalso erlang:element(3,LogH) >= "1.0" ->
traverse_dcd({Cont,Rest},Log,Fun);
traverse_dcd({Cont,Recs},Log,Fun) ->
{Cont,Recs,Log,Fun}.
check_qlc_hrl(Config) when is_list(Config) ->
St = {r1,false,dum},
foo = cqlc(qlc, q, [{lc,1,2,3}], St),
foo = cqlc(qlc, q, [{lc,1,2,3},b], St),
St = cqlc(qlc, q, [], St),
St = cqlc(qlc, blurf, [{lc,1,2,3},b], St),
St = cqlc(q, q, [{lc,1,2,3},b], St),
St = cqlc(qlc, q, [{lc,1,2,3},b,c], St),
St = cqlc(qlc, q, [a,b], St),
{r1,true,kalle} = cqlc(qlc, q, [{lc,1,2,3},b], {r1,true,kalle}),
ok.
%% From erl_lint.erl; original name was check_qlc_hrl/4.
cqlc(M, F, As, St) ->
Arity = length(As),
case As of
[{lc,_L,_E,_Qs}|_] when M =:= qlc, F =:= q,
Arity < 3,
not (((element(1, St) =:= r1) orelse fail) and (size(St) =:= 3) and element(2, St)) ->
foo;
_ ->
St
end.
%% OTP-7679: Thanks to Hunter Morris.
andalso_semi(Config) when is_list(Config) ->
ok = andalso_semi_foo(0),
ok = andalso_semi_foo(1),
fc(catch andalso_semi_foo(2)),
ok = andalso_semi_bar([a,b,c]),
ok = andalso_semi_bar(1),
fc(catch andalso_semi_bar([a,b])),
ok.
andalso_semi_foo(Bar) when is_integer(Bar) andalso Bar =:= 0; Bar =:= 1 ->
ok.
andalso_semi_bar(Bar) when is_list(Bar) andalso length(Bar) =:= 3; Bar =:= 1 ->
ok.
t_tuple_size(Config) when is_list(Config) ->
10 = do_tuple_size({1,2,3,4}),
fc(catch do_tuple_size({1,2,3})),
fc(catch do_tuple_size(42)),
error = ludicrous_tuple_size({a,b,c}),
error = ludicrous_tuple_size([a,b,c]),
ok.
do_tuple_size(T) when tuple_size(T) =:= 4 ->
{A,B,C,D} = T,
A+B+C+D.
ludicrous_tuple_size(T)
when tuple_size(T) =:= 16#7777777777777777777777777777777777 -> ok;
ludicrous_tuple_size(T)
when tuple_size(T) =:= 16#10000000000000000 -> ok;
ludicrous_tuple_size(T)
when tuple_size(T) =:= (1 bsl 64) - 1 -> ok;
ludicrous_tuple_size(T)
when tuple_size(T) =:= 16#FFFFFFFFFFFFFFFF -> ok;
ludicrous_tuple_size(_) -> error.
%%
%% The binary_part/2,3 guard BIFs
%%
-define(MASK_ERROR(EXPR),mask_error((catch (EXPR)))).
mask_error({'EXIT',{Err,_}}) ->
Err;
mask_error(Else) ->
Else.
%% Tests the binary_part/2,3 guard (GC) bif's.
binary_part(Config) when is_list(Config) ->
%% This is more or less a copy of what the guard_SUITE in emulator
%% does to cover the guard bif's
1 = bptest(<<1,2,3>>),
2 = bptest(<<2,1,3>>),
error = bptest(<<1>>),
error = bptest(<<>>),
error = bptest(apa),
3 = bptest(<<2,3,3>>),
%% With one variable (pos)
1 = bptest(<<1,2,3>>,1),
2 = bptest(<<2,1,3>>,1),
error = bptest(<<1>>,1),
error = bptest(<<>>,1),
error = bptest(apa,1),
3 = bptest(<<2,3,3>>,1),
%% With one variable (length)
1 = bptesty(<<1,2,3>>,1),
2 = bptesty(<<2,1,3>>,1),
error = bptesty(<<1>>,1),
error = bptesty(<<>>,1),
error = bptesty(apa,1),
3 = bptesty(<<2,3,3>>,2),
%% With one variable (whole tuple)
1 = bptestx(<<1,2,3>>,{1,1}),
2 = bptestx(<<2,1,3>>,{1,1}),
error = bptestx(<<1>>,{1,1}),
error = bptestx(<<>>,{1,1}),
error = bptestx(apa,{1,1}),
3 = bptestx(<<2,3,3>>,{1,2}),
%% With two variables
1 = bptest(<<1,2,3>>,1,1),
2 = bptest(<<2,1,3>>,1,1),
error = bptest(<<1>>,1,1),
error = bptest(<<>>,1,1),
error = bptest(apa,1,1),
3 = bptest(<<2,3,3>>,1,2),
%% Direct (autoimported) call, these will be evaluated by the compiler...
<<2>> = binary_part(<<1,2,3>>,1,1),
<<1>> = binary_part(<<2,1,3>>,1,1),
%% Compiler warnings due to constant evaluation expected (3)
badarg = ?MASK_ERROR(binary_part(<<1>>,1,1)),
badarg = ?MASK_ERROR(binary_part(<<>>,1,1)),
badarg = ?MASK_ERROR(binary_part(apa,1,1)),
<<3,3>> = binary_part(<<2,3,3>>,1,2),
%% Direct call through apply
<<2>> = apply(erlang,binary_part,[<<1,2,3>>,1,1]),
<<1>> = apply(erlang,binary_part,[<<2,1,3>>,1,1]),
%% Compiler warnings due to constant evaluation expected (3)
badarg = ?MASK_ERROR(apply(erlang,binary_part,[<<1>>,1,1])),
badarg = ?MASK_ERROR(apply(erlang,binary_part,[<<>>,1,1])),
badarg = ?MASK_ERROR(apply(erlang,binary_part,[apa,1,1])),
<<3,3>> = apply(erlang,binary_part,[<<2,3,3>>,1,2]),
%% Constant propagation
Bin = <<1,2,3>>,
ok = if
binary_part(Bin,1,1) =:= <<2>> ->
ok;
%% Compiler warning, clause cannot match (expected)
true ->
error
end,
ok = if
binary_part(Bin,{1,1}) =:= <<2>> ->
ok;
%% Compiler warning, clause cannot match (expected)
true ->
error
end,
ok.
bptest(B) when length(B) =:= 1337 ->
1;
bptest(B) when binary_part(B,{1,1}) =:= <<2>> ->
1;
bptest(B) when erlang:binary_part(B,1,1) =:= <<1>> ->
2;
bptest(B) when erlang:binary_part(B,{1,2}) =:= <<3,3>> ->
3;
bptest(_) ->
error.
bptest(B,A) when length(B) =:= A ->
1;
bptest(B,A) when binary_part(B,{A,1}) =:= <<2>> ->
1;
bptest(B,A) when erlang:binary_part(B,A,1) =:= <<1>> ->
2;
bptest(B,A) when erlang:binary_part(B,{A,2}) =:= <<3,3>> ->
3;
bptest(_,_) ->
error.
bptestx(B,A) when length(B) =:= A ->
1;
bptestx(B,A) when binary_part(B,A) =:= <<2>> ->
1;
bptestx(B,A) when erlang:binary_part(B,A) =:= <<1>> ->
2;
bptestx(B,A) when erlang:binary_part(B,A) =:= <<3,3>> ->
3;
bptestx(_,_) ->
error.
bptesty(B,A) when length(B) =:= A ->
1;
bptesty(B,A) when binary_part(B,{1,A}) =:= <<2>> ->
1;
bptesty(B,A) when erlang:binary_part(B,1,A) =:= <<1>> ->
2;
bptesty(B,A) when erlang:binary_part(B,{1,A}) =:= <<3,3>> ->
3;
bptesty(_,_) ->
error.
bptest(B,A,_C) when length(B) =:= A ->
1;
bptest(B,A,C) when binary_part(B,{A,C}) =:= <<2>> ->
1;
bptest(B,A,C) when erlang:binary_part(B,A,C) =:= <<1>> ->
2;
bptest(B,A,C) when erlang:binary_part(B,{A,C}) =:= <<3,3>> ->
3;
bptest(_,_,_) ->
error.
-define(FAILING(C),
if
C -> ct:fail(should_fail);
true -> ok
end,
if
true, C -> ct:fail(should_fail);
true -> ok
end).
bad_constants(Config) when is_list(Config) ->
?FAILING(false),
?FAILING([]),
?FAILING([a]),
?FAILING([Config]),
?FAILING({a,b}),
?FAILING({a,Config}),
?FAILING(<<1>>),
?FAILING(42),
?FAILING(3.14),
ok.
%% Call this function to turn off constant propagation.
id(I) -> I.
check(F, Result) ->
case F() of
Result -> ok;
Other ->
io:format("Expected: ~p\n", [Result]),
io:format(" Got: ~p\n", [Other]),
ct:fail(failed)
end.
fc({'EXIT',{function_clause,_}}) -> ok.
