%%
%% %CopyrightBegin%
%%
%% Copyright Ericsson AB 1998-2016. 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.
%%
%% %CopyrightEnd%
-module(erl_eval_SUITE).
-export([all/0, suite/0,groups/0,init_per_suite/1, end_per_suite/1,
init_per_testcase/2, end_per_testcase/2,
init_per_group/2,end_per_group/2]).
-export([guard_1/1, guard_2/1,
match_pattern/1,
match_bin/1,
string_plusplus/1,
pattern_expr/1,
guard_3/1, guard_4/1, guard_5/1,
lc/1,
simple_cases/1,
unary_plus/1,
apply_atom/1,
otp_5269/1,
otp_6539/1,
otp_6543/1,
otp_6787/1,
otp_6977/1,
otp_7550/1,
otp_8133/1,
otp_10622/1,
otp_13228/1,
funs/1,
try_catch/1,
eval_expr_5/1,
zero_width/1,
eep37/1,
eep43/1]).
%%
%% Define to run outside of test server
%%
%%-define(STANDALONE,1).
-import(lists,[concat/1, sort/1]).
-export([count_down/2, count_down_fun/0, do_apply/2,
local_func/3, local_func_value/2]).
-ifdef(STANDALONE).
-define(config(A,B),config(A,B)).
-export([config/2]).
-define(line, noop, ).
config(priv_dir,_) ->
".".
-else.
-include_lib("common_test/include/ct.hrl").
-endif.
init_per_testcase(_Case, Config) ->
Config.
end_per_testcase(_Case, _Config) ->
ok.
suite() ->
[{ct_hooks,[ts_install_cth]},
{timetrap,{minutes,1}}].
all() ->
[guard_1, guard_2, match_pattern, string_plusplus,
pattern_expr, match_bin, guard_3, guard_4, guard_5, lc,
simple_cases, unary_plus, apply_atom, otp_5269,
otp_6539, otp_6543, otp_6787, otp_6977, otp_7550,
otp_8133, otp_10622, otp_13228,
funs, try_catch, eval_expr_5, zero_width,
eep37, eep43].
groups() ->
[].
init_per_suite(Config) ->
Config.
end_per_suite(_Config) ->
ok.
init_per_group(_GroupName, Config) ->
Config.
end_per_group(_GroupName, Config) ->
Config.
%% OTP-2405
guard_1(Config) when is_list(Config) ->
?line {ok,Tokens ,_} =
erl_scan:string("if a+4 == 4 -> yes; true -> no end. "),
?line {ok, [Expr]} = erl_parse:parse_exprs(Tokens),
?line no = guard_1_compiled(),
?line {value, no, []} = erl_eval:expr(Expr, []),
ok.
guard_1_compiled() ->
if a+4 == 4 -> yes; true -> no end.
%% Similar to guard_1, but type-correct.
guard_2(Config) when is_list(Config) ->
?line {ok,Tokens ,_} =
erl_scan:string("if 6+4 == 4 -> yes; true -> no end. "),
?line {ok, [Expr]} = erl_parse:parse_exprs(Tokens),
?line no = guard_2_compiled(),
?line {value, no, []} = erl_eval:expr(Expr, []),
ok.
guard_2_compiled() ->
if 6+4 == 4 -> yes; true -> no end.
%% OTP-3069: syntactic sugar string ++ ...
string_plusplus(Config) when is_list(Config) ->
?line check(fun() -> case "abc" of "ab" ++ L -> L end end,
"case \"abc\" of \"ab\" ++ L -> L end. ",
"c"),
?line check(fun() -> case "abcde" of "ab" ++ "cd" ++ L -> L end end,
"case \"abcde\" of \"ab\" ++ \"cd\" ++ L -> L end. ",
"e"),
?line check(fun() -> case "abc" of [97, 98] ++ L -> L end end,
"case \"abc\" of [97, 98] ++ L -> L end. ",
"c"),
ok.
%% OTP-2983: match operator in pattern.
match_pattern(Config) when is_list(Config) ->
?line check(fun() -> case {a, b} of {a, _X}=Y -> {x,Y} end end,
"case {a, b} of {a, X}=Y -> {x,Y} end. ",
{x, {a, b}}),
?line check(fun() -> case {a, b} of Y={a, _X} -> {x,Y} end end,
"case {a, b} of Y={a, X} -> {x,Y} end. ",
{x, {a, b}}),
?line check(fun() -> case {a, b} of Y={a, _X}=Z -> {Z,Y} end end,
"case {a, b} of Y={a, X}=Z -> {Z,Y} end. ",
{{a, b}, {a, b}}),
?line check(fun() -> A = 4, B = 28, <<13:(A+(X=B))>>, X end,
"begin A = 4, B = 28, <<13:(A+(X=B))>>, X end.",
28),
ok.
%% Binary match problems.
match_bin(Config) when is_list(Config) ->
?line check(fun() -> <<"abc">> = <<"abc">> end,
"<<\"abc\">> = <<\"abc\">>. ",
<<"abc">>),
?line check(fun() ->
<<Size,B:Size/binary,Rest/binary>> = <<2,"AB","CD">>,
{Size,B,Rest}
end,
"begin <<Size,B:Size/binary,Rest/binary>> = <<2,\"AB\",\"CD\">>, "
"{Size,B,Rest} end. ",
{2,<<"AB">>,<<"CD">>}),
ok.
%% OTP-3144: compile-time expressions in pattern.
pattern_expr(Config) when is_list(Config) ->
?line check(fun() -> case 4 of 2+2 -> ok end end,
"case 4 of 2+2 -> ok end. ",
ok),
?line check(fun() -> case 2 of +2 -> ok end end,
"case 2 of +2 -> ok end. ",
ok),
ok.
%% OTP-4518.
guard_3(Config) when is_list(Config) ->
?line check(fun() -> if false -> false; true -> true end end,
"if false -> false; true -> true end.",
true),
?line check(fun() -> if <<"hej">> == <<"hopp">> -> true;
true -> false end end,
"begin if <<\"hej\">> == <<\"hopp\">> -> true;
true -> false end end.",
false),
?line check(fun() -> if <<"hej">> == <<"hej">> -> true;
true -> false end end,
"begin if <<\"hej\">> == <<\"hej\">> -> true;
true -> false end end.",
true),
ok.
%% OTP-4885.
guard_4(Config) when is_list(Config) ->
check(fun() -> if erlang:'+'(3,a) -> true ; true -> false end end,
"if erlang:'+'(3,a) -> true ; true -> false end.",
false),
check(fun() -> if erlang:is_integer(3) -> true ; true -> false end
end,
"if erlang:is_integer(3) -> true ; true -> false end.",
true),
?line check(fun() -> [X || X <- [1,2,3], erlang:is_integer(X)] end,
"[X || X <- [1,2,3], erlang:is_integer(X)].",
[1,2,3]),
?line check(fun() -> if is_atom(is_integer(a)) -> true ; true -> false end
end,
"if is_atom(is_integer(a)) -> true ; true -> false end.",
true),
check(fun() -> if erlang:is_atom(erlang:is_integer(a)) -> true;
true -> false end end,
"if erlang:is_atom(erlang:is_integer(a)) -> true; "
"true -> false end.",
true),
?line check(fun() -> if is_atom(3+a) -> true ; true -> false end end,
"if is_atom(3+a) -> true ; true -> false end.",
false),
?line check(fun() -> if erlang:is_atom(3+a) -> true ; true -> false end
end,
"if erlang:is_atom(3+a) -> true ; true -> false end.",
false),
ok.
%% Guards with erlang:'=='/2.
guard_5(Config) when is_list(Config) ->
{ok,Tokens ,_} =
erl_scan:string("case 1 of A when erlang:'=='(A, 1) -> true end."),
{ok, [Expr]} = erl_parse:parse_exprs(Tokens),
true = guard_5_compiled(),
{value, true, [{'A',1}]} = erl_eval:expr(Expr, []),
ok.
guard_5_compiled() ->
case 1 of A when erlang:'=='(A, 1) -> true end.
%% OTP-4518.
lc(Config) when is_list(Config) ->
?line check(fun() -> X = 32, [X || X <- [1,2,3]] end,
"begin X = 32, [X || X <- [1,2,3]] end.",
[1,2,3]),
?line check(fun() -> X = 32,
[X || <<X:X>> <- [<<1:32>>,<<2:32>>,<<3:8>>]] end,
%% "binsize variable" ^
"begin X = 32,
[X || <<X:X>> <- [<<1:32>>,<<2:32>>,<<3:8>>]] end.",
[1,2]),
?line check(fun() -> Y = 13,[X || {X,Y} <- [{1,2}]] end,
"begin Y = 13,[X || {X,Y} <- [{1,2}]] end.",
[1]),
?line error_check("begin [A || X <- [{1,2}], 1 == A] end.",
{unbound_var,'A'}),
?line error_check("begin X = 32,
[{Y,W} || X <- [1,2,32,Y=4], Z <- [1,2,W=3]] end.",
{unbound_var,'Y'}),
?line error_check("begin X = 32,<<A:B>> = <<100:X>> end.",
{unbound_var,'B'}),
?line check(fun() -> [X || X <- [1,2,3,4], not (X < 2)] end,
"begin [X || X <- [1,2,3,4], not (X < 2)] end.",
[2,3,4]),
?line check(fun() -> [X || X <- [true,false], X] end,
"[X || X <- [true,false], X].", [true]),
ok.
%% Simple cases, just to cover some code.
simple_cases(Config) when is_list(Config) ->
?line check(fun() -> A = $C end, "A = $C.", $C),
%% ?line check(fun() -> A = 3.14 end, "A = 3.14.", 3.14),
?line check(fun() -> self() ! a, A = receive a -> true end end,
"begin self() ! a, A = receive a -> true end end.",
true),
?line check(fun() -> c:flush(), self() ! a, self() ! b, self() ! c,
receive b -> b end,
{messages, [a,c]} =
erlang:process_info(self(), messages),
c:flush() end,
"begin c:flush(), self() ! a, self() ! b, self() ! c,"
"receive b -> b end,"
"{messages, [a,c]} ="
" erlang:process_info(self(), messages), c:flush() end.",
ok),
?line check(fun() -> self() ! a, A = receive a -> true
after 0 -> false end end,
"begin self() ! a, A = receive a -> true"
" after 0 -> false end end.",
true),
?line check(fun() -> c:flush(), self() ! a, self() ! b, self() ! c,
receive b -> b after 0 -> true end,
{messages, [a,c]} =
erlang:process_info(self(), messages),
c:flush() end,
"begin c:flush(), self() ! a, self() ! b, self() ! c,"
"receive b -> b after 0 -> true end,"
"{messages, [a,c]} ="
" erlang:process_info(self(), messages), c:flush() end.",
ok),
?line check(fun() -> receive _ -> true after 10 -> false end end,
"receive _ -> true after 10 -> false end.",
false),
?line check(fun() -> F = fun(A) -> A end, true = 3 == F(3) end,
"begin F = fun(A) -> A end, true = 3 == F(3) end.",
true),
?line check(fun() -> F = fun(A) -> A end, true = 3 == apply(F, [3]) end,
"begin F = fun(A) -> A end, true = 3 == apply(F,[3]) end.",
true),
?line check(fun() -> catch throw(a) end, "catch throw(a).", a),
?line check(fun() -> catch a end, "catch a.", a),
?line check(fun() -> 4 == 3 end, "4 == 3.", false),
?line check(fun() -> not true end, "not true.", false),
?line check(fun() -> -3 end, "-3.", -3),
?line error_check("3.0 = 4.0.", {badmatch,4.0}),
?line check(fun() -> <<(3.0+2.0):32/float>> = <<5.0:32/float>> end,
"<<(3.0+2.0):32/float>> = <<5.0:32/float>>.",
<<5.0:32/float>>),
?line check(fun() -> false andalso kludd end, "false andalso kludd.",
false),
?line check(fun() -> true andalso true end, "true andalso true.",
true),
?line check(fun() -> true andalso false end, "true andalso false.",
false),
?line check(fun() -> true andalso kludd end, "true andalso kludd.",
kludd),
?line error_check("kladd andalso kludd.", {badarg,kladd}),
?line check(fun() -> if false andalso kludd -> a; true -> b end end,
"if false andalso kludd -> a; true -> b end.",
b),
?line check(fun() -> if true andalso true -> a; true -> b end end,
"if true andalso true -> a; true -> b end.",
a),
?line check(fun() -> if true andalso false -> a; true -> b end end,
"if true andalso false -> a; true -> b end.",
b),
?line check(fun() -> true orelse kludd end,
"true orelse kludd.", true),
?line check(fun() -> false orelse false end,
"false orelse false.", false),
?line check(fun() -> false orelse true end,
"false orelse true.", true),
?line check(fun() -> false orelse kludd end,
"false orelse kludd.", kludd),
?line error_check("kladd orelse kludd.", {badarg,kladd}),
?line error_check("[X || X <- [1,2,3], begin 1 end].",{bad_filter,1}),
?line error_check("[X || X <- a].",{bad_generator,a}),
?line check(fun() -> if true orelse kludd -> a; true -> b end end,
"if true orelse kludd -> a; true -> b end.", a),
?line check(fun() -> if false orelse false -> a; true -> b end end,
"if false orelse false -> a; true -> b end.", b),
?line check(fun() -> if false orelse true -> a; true -> b end end,
"if false orelse true -> a; true -> b end.", a),
?line check(fun() -> [X || X <- [1,2,3], X+2] end,
"[X || X <- [1,2,3], X+2].", []),
?line check(fun() -> [X || X <- [1,2,3], [X] == [X || X <- [2]]] end,
"[X || X <- [1,2,3], [X] == [X || X <- [2]]].",
[2]),
?line check(fun() -> F = fun(1) -> ett; (2) -> zwei end,
ett = F(1), zwei = F(2) end,
"begin F = fun(1) -> ett; (2) -> zwei end,
ett = F(1), zwei = F(2) end.",
zwei),
?line check(fun() -> F = fun(X) when X == 1 -> ett;
(X) when X == 2 -> zwei end,
ett = F(1), zwei = F(2) end,
"begin F = fun(X) when X == 1 -> ett;
(X) when X == 2 -> zwei end,
ett = F(1), zwei = F(2) end.",
zwei),
?line error_check("begin F = fun(1) -> ett end, zwei = F(2) end.",
function_clause),
?line check(fun() -> if length([1]) == 1 -> yes;
true -> no end end,
"if length([1]) == 1 -> yes;
true -> no end.",
yes),
?line check(fun() -> if is_integer(3) -> true; true -> false end end,
"if is_integer(3) -> true; true -> false end.", true),
?line check(fun() -> if integer(3) -> true; true -> false end end,
"if integer(3) -> true; true -> false end.", true),
?line check(fun() -> if is_float(3) -> true; true -> false end end,
"if is_float(3) -> true; true -> false end.", false),
?line check(fun() -> if float(3) -> true; true -> false end end,
"if float(3) -> true; true -> false end.", false),
?line check(fun() -> if is_number(3) -> true; true -> false end end,
"if is_number(3) -> true; true -> false end.", true),
?line check(fun() -> if number(3) -> true; true -> false end end,
"if number(3) -> true; true -> false end.", true),
?line check(fun() -> if is_atom(a) -> true; true -> false end end,
"if is_atom(a) -> true; true -> false end.", true),
?line check(fun() -> if atom(a) -> true; true -> false end end,
"if atom(a) -> true; true -> false end.", true),
?line check(fun() -> if is_list([]) -> true; true -> false end end,
"if is_list([]) -> true; true -> false end.", true),
?line check(fun() -> if list([]) -> true; true -> false end end,
"if list([]) -> true; true -> false end.", true),
?line check(fun() -> if is_tuple({}) -> true; true -> false end end,
"if is_tuple({}) -> true; true -> false end.", true),
?line check(fun() -> if tuple({}) -> true; true -> false end end,
"if tuple({}) -> true; true -> false end.", true),
?line check(fun() -> if is_pid(self()) -> true; true -> false end end,
"if is_pid(self()) -> true; true -> false end.", true),
?line check(fun() -> if pid(self()) -> true; true -> false end end,
"if pid(self()) -> true; true -> false end.", true),
?line check(fun() -> R = make_ref(), if is_reference(R) -> true;
true -> false end end,
"begin R = make_ref(), if is_reference(R) -> true;"
"true -> false end end.", true),
?line check(fun() -> R = make_ref(), if reference(R) -> true;
true -> false end end,
"begin R = make_ref(), if reference(R) -> true;"
"true -> false end end.", true),
?line check(fun() -> if is_port(a) -> true; true -> false end end,
"if is_port(a) -> true; true -> false end.", false),
?line check(fun() -> if port(a) -> true; true -> false end end,
"if port(a) -> true; true -> false end.", false),
?line check(fun() -> if is_function(a) -> true; true -> false end end,
"if is_function(a) -> true; true -> false end.", false),
?line check(fun() -> if function(a) -> true; true -> false end end,
"if function(a) -> true; true -> false end.", false),
?line check(fun() -> if is_binary(<<>>) -> true; true -> false end end,
"if is_binary(<<>>) -> true; true -> false end.", true),
?line check(fun() -> if binary(<<>>) -> true; true -> false end end,
"if binary(<<>>) -> true; true -> false end.", true),
?line check(fun() -> if is_integer(a) == true -> yes;
true -> no end end,
"if is_integer(a) == true -> yes;
true -> no end.",
no),
?line check(fun() -> if [] -> true; true -> false end end,
"if [] -> true; true -> false end.", false),
?line error_check("if lists:member(1,[1]) -> true; true -> false end.",
illegal_guard_expr),
?line error_check("if false -> true end.", if_clause),
?line check(fun() -> if a+b -> true; true -> false end end,
"if a + b -> true; true -> false end.", false),
?line check(fun() -> if + b -> true; true -> false end end,
"if + b -> true; true -> false end.", false),
?line error_check("case foo of bar -> true end.", {case_clause,foo}),
?line error_check("case 4 of 2+a -> true; _ -> false end.",
illegal_pattern),
?line error_check("case 4 of +a -> true; _ -> false end.",
illegal_pattern),
?line check(fun() -> case a of
X when X == b -> one;
X when X == a -> two
end end,
"begin case a of
X when X == b -> one;
X when X == a -> two
end end.", two),
?line error_check("3 = 4.", {badmatch,4}),
?line error_check("a = 3.", {badmatch,3}),
%% ?line error_check("3.1 = 2.7.",{badmatch,2.7}),
?line error_check("$c = 4.", {badmatch,4}),
?line check(fun() -> $c = $c end, "$c = $c.", $c),
?line check(fun() -> _ = bar end, "_ = bar.", bar),
?line check(fun() -> A = 14, A = 14 end,
"begin A = 14, A = 14 end.", 14),
?line error_check("begin A = 14, A = 16 end.", {badmatch,16}),
?line error_check("\"hej\" = \"san\".", {badmatch,"san"}),
?line check(fun() -> "hej" = "hej" end,
"\"hej\" = \"hej\".", "hej"),
?line error_check("[] = [a].", {badmatch,[a]}),
?line check(fun() -> [] = [] end, "[] = [].", []),
?line error_check("[a] = [].", {badmatch,[]}),
?line error_check("{a,b} = 34.", {badmatch,34}),
?line check(fun() -> <<X:7>> = <<8:7>>, X end,
"begin <<X:7>> = <<8:7>>, X end.", 8),
?line error_check("<<34:32>> = \"hej\".", {badmatch,"hej"}),
?line check(fun() -> trunc((1 * 3 div 3 + 4 - 3) / 1) rem 2 end,
"begin trunc((1 * 3 div 3 + 4 - 3) / 1) rem 2 end.", 0),
?line check(fun() -> (2#101 band 2#10101) bor (2#110 bxor 2#010) end,
"(2#101 band 2#10101) bor (2#110 bxor 2#010).", 5),
?line check(fun() -> (2#1 bsl 4) + (2#10000 bsr 3) end,
"(2#1 bsl 4) + (2#10000 bsr 3).", 18),
?line check(fun() -> ((1<3) and ((1 =:= 2) or (1 =/= 2))) xor (1=<2) end,
"((1<3) and ((1 =:= 2) or (1 =/= 2))) xor (1=<2).", false),
?line check(fun() -> (a /= b) or (2 > 4) or (3 >= 3) end,
"(a /= b) or (2 > 4) or (3 >= 3).", true),
?line check(fun() -> "hej" ++ "san" =/= "hejsan" -- "san" end,
"\"hej\" ++ \"san\" =/= \"hejsan\" -- \"san\".", true),
?line check(fun() -> (bnot 1) < -0 end, "(bnot (+1)) < -0.", true),
ok.
%% OTP-4929. Unary plus rejects non-numbers.
unary_plus(Config) when is_list(Config) ->
?line check(fun() -> F = fun(X) -> + X end,
true = -1 == F(-1) end,
"begin F = fun(X) -> + X end,"
" true = -1 == F(-1) end.", true, ['F'], none, none),
?line error_check("+a.", badarith),
ok.
%% OTP-5064. Can no longer apply atoms.
apply_atom(Config) when is_list(Config) ->
?line error_check("[X || X <- [[1],[2]],
begin L = length, L(X) =:= 1 end].",
{badfun,length}),
ok.
%% OTP-5269. Bugs in the bit syntax.
otp_5269(Config) when is_list(Config) ->
?line check(fun() -> L = 8,
F = fun(<<A:L,B:A>>) -> B end,
F(<<16:8, 7:16>>)
end,
"begin
L = 8, F = fun(<<A:L,B:A>>) -> B end, F(<<16:8, 7:16>>)
end.",
7),
?line check(fun() -> L = 8,
F = fun(<<L:L,B:L>>) -> B end,
F(<<16:8, 7:16>>)
end,
"begin
L = 8, F = fun(<<L:L,B:L>>) -> B end, F(<<16:8, 7:16>>)
end.",
7),
?line check(fun() -> L = 8, <<A:L,B:A>> = <<16:8, 7:16>>, B end,
"begin L = 8, <<A:L,B:A>> = <<16:8, 7:16>>, B end.",
7),
?line error_check("begin L = 8, <<L:L,B:L>> = <<16:8, 7:16>> end.",
{badmatch,<<16:8,7:16>>}),
?line error_check("begin <<L:16,L:L>> = <<16:16,8:16>>, L end.",
{badmatch, <<16:16,8:16>>}),
?line check(fun() -> U = 8, (fun(<<U:U>>) -> U end)(<<32:8>>) end,
"begin U = 8, (fun(<<U:U>>) -> U end)(<<32:8>>) end.",
32),
?line check(fun() -> U = 8, [U || <<U:U>> <- [<<32:8>>]] end,
"begin U = 8, [U || <<U:U>> <- [<<32:8>>]] end.",
[32]),
?line error_check("(fun({3,<<A:32,A:32>>}) -> a end)
({3,<<17:32,19:32>>}).",
function_clause),
?line check(fun() -> [X || <<A:8,
B:A>> <- [<<16:8,19:16>>],
<<X:8>> <- [<<B:8>>]] end,
"[X || <<A:8,
B:A>> <- [<<16:8,19:16>>],
<<X:8>> <- [<<B:8>>]].",
[19]),
?line check(fun() ->
(fun (<<A:1/binary, B:8/integer, _C:B/binary>>) ->
case A of
B -> wrong;
_ -> ok
end
end)(<<1,2,3,4>>) end,
"(fun(<<A:1/binary, B:8/integer, _C:B/binary>>) ->"
" case A of B -> wrong; _ -> ok end"
" end)(<<1, 2, 3, 4>>).",
ok),
ok.
%% OTP-6539. try/catch bugs.
otp_6539(Config) when is_list(Config) ->
?line check(fun() ->
F = fun(A,B) ->
try A+B
catch _:_ -> dontthinkso
end
end,
lists:zipwith(F, [1,2], [2,3])
end,
"begin
F = fun(A,B) ->
try A+B
catch _:_ -> dontthinkso
end
end,
lists:zipwith(F, [1,2], [2,3])
end.",
[3, 5]),
ok.
%% OTP-6543. bitlevel binaries.
otp_6543(Config) when is_list(Config) ->
?line check(fun() ->
<< <<X>> || <<X>> <- [1,2,3] >>
end,
"<< <<X>> || <<X>> <- [1,2,3] >>.",
<<>>),
?line check(fun() ->
<< <<X>> || X <- [1,2,3] >>
end,
"<< <<X>> || X <- [1,2,3] >>.",
<<1,2,3>>),
?line check(fun() ->
<< <<X:8>> || <<X:2>> <= <<"hej">> >>
end,
"<< <<X:8>> || <<X:2>> <= <<\"hej\">> >>.",
<<1,2,2,0,1,2,1,1,1,2,2,2>>),
?line check(fun() ->
<< <<X:8>> ||
<<65,X:4>> <= <<65,7:4,65,3:4,66,8:4>> >>
end,
"<< <<X:8>> ||
<<65,X:4>> <= <<65,7:4,65,3:4,66,8:4>> >>.",
<<7,3>>),
?line check(fun() -> <<34:18/big>> end,
"<<34:18/big>>.",
<<0,8,2:2>>),
?line check(fun() -> <<34:18/big-unit:2>> end,
"<<34:18/big-unit:2>>.",
<<0,0,0,2,2:4>>),
?line check(fun() -> <<34:18/little>> end,
"<<34:18/little>>.",
<<34,0,0:2>>),
?line case eval_string("<<34:18/native>>.") of
<<0,8,2:2>> -> ok;
<<34,0,0:2>> -> ok
end,
?line check(fun() -> <<34:18/big-signed>> end,
"<<34:18/big-signed>>.",
<<0,8,2:2>>),
?line check(fun() -> <<34:18/little-signed>> end,
"<<34:18/little-signed>>.",
<<34,0,0:2>>),
?line case eval_string("<<34:18/native-signed>>.") of
<<0,8,2:2>> -> ok;
<<34,0,0:2>> -> ok
end,
?line check(fun() -> <<34:18/big-unsigned>> end,
"<<34:18/big-unsigned>>.",
<<0,8,2:2>>),
?line check(fun() -> <<34:18/little-unsigned>> end,
"<<34:18/little-unsigned>>.",
<<34,0,0:2>>),
?line case eval_string("<<34:18/native-unsigned>>.") of
<<0,8,2:2>> -> ok;
<<34,0,0:2>> -> ok
end,
?line check(fun() -> <<3.14:32/float-big>> end,
"<<3.14:32/float-big>>.",
<<64,72,245,195>>),
?line check(fun() -> <<3.14:32/float-little>> end,
"<<3.14:32/float-little>>.",
<<195,245,72,64>>),
?line case eval_string("<<3.14:32/float-native>>.") of
<<64,72,245,195>> -> ok;
<<195,245,72,64>> -> ok
end,
?line error_check("<<(<<17,3:2>>)/binary>>.", badarg),
?line check(fun() -> <<(<<17,3:2>>)/bitstring>> end,
"<<(<<17,3:2>>)/bitstring>>.",
<<17,3:2>>),
?line check(fun() -> <<(<<17,3:2>>):10/bitstring>> end,
"<<(<<17,3:2>>):10/bitstring>>.",
<<17,3:2>>),
?line check(fun() -> <<<<344:17>>/binary-unit:17>> end,
"<<<<344:17>>/binary-unit:17>>.",
<<344:17>>),
?line check(fun() -> <<X:18/big>> = <<34:18/big>>, X end,
"begin <<X:18/big>> = <<34:18/big>>, X end.",
34),
?line check(fun() -> <<X:18/big-unit:2>> = <<34:18/big-unit:2>>, X end,
"begin <<X:18/big-unit:2>> = <<34:18/big-unit:2>>, X end.",
34),
?line check(fun() -> <<X:18/little>> = <<34:18/little>>, X end,
"begin <<X:18/little>> = <<34:18/little>>, X end.",
34),
?line check(fun() -> <<X:18/native>> = <<34:18/native>>, X end,
"begin <<X:18/native>> = <<34:18/native>>, X end.",
34),
?line check(fun() -> <<X:18/big-signed>> = <<34:18/big-signed>>, X end,
"begin <<X:18/big-signed>> = <<34:18/big-signed>>, X end.",
34),
?line check(fun() -> <<X:18/little-signed>> = <<34:18/little-signed>>,
X end,
"begin <<X:18/little-signed>> = <<34:18/little-signed>>,
X end.",
34),
?line check(fun() -> <<X:18/native-signed>> = <<34:18/native-signed>>,
X end,
"begin <<X:18/native-signed>> = <<34:18/native-signed>>,
X end.",
34),
?line check(fun() -> <<X:18/big-unsigned>> = <<34:18/big-unsigned>>,
X end,
"begin <<X:18/big-unsigned>> = <<34:18/big-unsigned>>,
X end.",
34),
?line check(fun() ->
<<X:18/little-unsigned>> = <<34:18/little-unsigned>>,
X end,
"begin <<X:18/little-unsigned>> = <<34:18/little-unsigned>>,
X end.",
34),
?line check(fun() ->
<<X:18/native-unsigned>> = <<34:18/native-unsigned>>,
X end,
"begin <<X:18/native-unsigned>> = <<34:18/native-unsigned>>,
X end.",
34),
?line check(fun() -> <<X:32/float-big>> = <<2.0:32/float-big>>, X end,
"begin <<X:32/float-big>> = <<2.0:32/float-big>>,
X end.",
2.0),
?line check(fun() -> <<X:32/float-little>> = <<2.0:32/float-little>>,
X end,
"begin <<X:32/float-little>> = <<2.0:32/float-little>>,
X end.",
2.0),
?line check(fun() -> <<X:32/float-native>> = <<2.0:32/float-native>>,
X end,
"begin <<X:32/float-native>> = <<2.0:32/float-native>>,
X end.",
2.0),
?line check(
fun() ->
[X || <<"hej",X:8>> <= <<"hej",8,"san",9,"hej",17,"hej">>]
end,
"[X || <<\"hej\",X:8>> <=
<<\"hej\",8,\"san\",9,\"hej\",17,\"hej\">>].",
[8,17]),
?line check(
fun() ->
L = 8, << <<B:32>> || <<L:L,B:L>> <= <<16:8, 7:16>> >>
end,
"begin L = 8, << <<B:32>> || <<L:L,B:L>> <= <<16:8, 7:16>> >>
end.",
<<0,0,0,7>>),
%% Test the Value part of a binary segment.
%% "Old" bugs have been fixed (partial_eval is called on Value).
?line check(fun() -> [ 3 || <<17/float>> <= <<17.0/float>>] end,
"[ 3 || <<17/float>> <= <<17.0/float>>].",
[3]),
?line check(fun() -> [ 3 || <<17/float>> <- [<<17.0/float>>]] end,
"[ 3 || <<17/float>> <- [<<17.0/float>>]].",
[3]),
?line check(fun() -> [ X || <<17/float,X:3>> <= <<17.0/float,2:3>>] end,
"[ X || <<17/float,X:3>> <= <<17.0/float,2:3>>].",
[2]),
?line check(fun() ->
[ foo || <<(1 bsl 1023)/float>> <= <<(1 bsl 1023)/float>>]
end,
"[ foo || <<(1 bsl 1023)/float>> <= <<(1 bsl 1023)/float>>].",
[foo]),
?line check(fun() ->
[ foo || <<(1 bsl 1023)/float>> <- [<<(1 bsl 1023)/float>>]]
end,
"[ foo || <<(1 bsl 1023)/float>> <- [<<(1 bsl 1023)/float>>]].",
[foo]),
?line error_check("[ foo || <<(1 bsl 1024)/float>> <-
[<<(1 bsl 1024)/float>>]].",
badarg),
?line check(fun() ->
[ foo || <<(1 bsl 1024)/float>> <- [<<(1 bsl 1023)/float>>]]
end,
"[ foo || <<(1 bsl 1024)/float>> <-
[<<(1 bsl 1023)/float>>]].",
[]),
?line check(fun() ->
[ foo || <<(1 bsl 1024)/float>> <= <<(1 bsl 1023)/float>>]
end,
"[ foo || <<(1 bsl 1024)/float>> <=
<<(1 bsl 1023)/float>>].",
[]),
?line check(fun() ->
L = 8,
[{L,B} || <<L:L,B:L/float>> <= <<32:8,7:32/float>>]
end,
"begin L = 8,
[{L,B} || <<L:L,B:L/float>> <= <<32:8,7:32/float>>]
end.",
[{32,7.0}]),
?line check(fun() ->
L = 8,
[{L,B} || <<L:L,B:L/float>> <- [<<32:8,7:32/float>>]]
end,
"begin L = 8,
[{L,B} || <<L:L,B:L/float>> <- [<<32:8,7:32/float>>]]
end.",
[{32,7.0}]),
?line check(fun() ->
[foo || <<"s">> <= <<"st">>]
end,
"[foo || <<\"s\">> <= <<\"st\">>].",
[foo]),
?line check(fun() -> <<_:32>> = <<17:32>> end,
"<<_:32>> = <<17:32>>.",
<<17:32>>),
?line check(fun() -> [foo || <<_:32>> <= <<17:32,20:32>>] end,
"[foo || <<_:32>> <= <<17:32,20:32>>].",
[foo,foo]),
?line check(fun() -> << <<X:32>> || X <- [1,2,3], X > 1 >> end,
"<< <<X:32>> || X <- [1,2,3], X > 1 >>.",
<<0,0,0,2,0,0,0,3>>),
?line error_check("[X || <<X>> <= [a,b]].",{bad_generator,[a,b]}),
ok.
%% OTP-6787. bitlevel binaries.
otp_6787(Config) when is_list(Config) ->
?line check(
fun() -> <<16:(1024*1024)>> = <<16:(1024*1024)>> end,
"<<16:(1024*1024)>> = <<16:(1024*1024)>>.",
<<16:1048576>>),
ok.
%% OTP-6977. ++ bug.
otp_6977(Config) when is_list(Config) ->
?line check(
fun() -> (fun([$X] ++ _) -> ok end)("X") end,
"(fun([$X] ++ _) -> ok end)(\"X\").",
ok),
ok.
%% OTP-7550. Support for UTF-8, UTF-16, UTF-32.
otp_7550(Config) when is_list(Config) ->
%% UTF-8.
?line check(
fun() -> <<65>> = <<65/utf8>> end,
"<<65>> = <<65/utf8>>.",
<<65>>),
?line check(
fun() -> <<350/utf8>> = <<197,158>> end,
"<<350/utf8>> = <<197,158>>.",
<<197,158>>),
?line check(
fun() -> <<$b,$j,$\303,$\266,$r,$n>> = <<"bj\366rn"/utf8>> end,
"<<$b,$j,$\303,$\266,$r,$n>> = <<\"bj\366rn\"/utf8>>.",
<<$b,$j,$\303,$\266,$r,$n>>),
%% UTF-16.
?line check(
fun() -> <<0,65>> = <<65/utf16>> end,
"<<0,65>> = <<65/utf16>>.",
<<0,65>>),
?line check(
fun() -> <<16#D8,16#08,16#DF,16#45>> = <<16#12345/utf16>> end,
"<<16#D8,16#08,16#DF,16#45>> = <<16#12345/utf16>>.",
<<16#D8,16#08,16#DF,16#45>>),
?line check(
fun() -> <<16#08,16#D8,16#45,16#DF>> = <<16#12345/little-utf16>> end,
"<<16#08,16#D8,16#45,16#DF>> = <<16#12345/little-utf16>>.",
<<16#08,16#D8,16#45,16#DF>>),
?line check(
fun() -> <<350/utf16>> = <<1,94>> end,
"<<350/utf16>> = <<1,94>>.",
<<1,94>>),
?line check(
fun() -> <<350/little-utf16>> = <<94,1>> end,
"<<350/little-utf16>> = <<94,1>>.",
<<94,1>>),
?line check(
fun() -> <<16#12345/utf16>> = <<16#D8,16#08,16#DF,16#45>> end,
"<<16#12345/utf16>> = <<16#D8,16#08,16#DF,16#45>>.",
<<16#D8,16#08,16#DF,16#45>>),
?line check(
fun() -> <<16#12345/little-utf16>> = <<16#08,16#D8,16#45,16#DF>> end,
"<<16#12345/little-utf16>> = <<16#08,16#D8,16#45,16#DF>>.",
<<16#08,16#D8,16#45,16#DF>>),
%% UTF-32.
?line check(
fun() -> <<16#12345/utf32>> = <<16#0,16#01,16#23,16#45>> end,
"<<16#12345/utf32>> = <<16#0,16#01,16#23,16#45>>.",
<<16#0,16#01,16#23,16#45>>),
?line check(
fun() -> <<16#0,16#01,16#23,16#45>> = <<16#12345/utf32>> end,
"<<16#0,16#01,16#23,16#45>> = <<16#12345/utf32>>.",
<<16#0,16#01,16#23,16#45>>),
?line check(
fun() -> <<16#12345/little-utf32>> = <<16#45,16#23,16#01,16#00>> end,
"<<16#12345/little-utf32>> = <<16#45,16#23,16#01,16#00>>.",
<<16#45,16#23,16#01,16#00>>),
?line check(
fun() -> <<16#12345/little-utf32>> end,
"<<16#12345/little-utf32>>.",
<<16#45,16#23,16#01,16#00>>),
%% Mixed.
?line check(
fun() -> <<16#41,16#12345/utf32,16#0391:16,16#2E:8>> end,
"<<16#41,16#12345/utf32,16#0391:16,16#2E:8>>.",
<<16#41,16#00,16#01,16#23,16#45,16#03,16#91,16#2E>>),
ok.
%% OTP-8133. Bit comprehension bug.
otp_8133(Config) when is_list(Config) ->
?line check(
fun() ->
E = fun(N) ->
if
is_integer(N) -> <<N/integer>>;
true -> throw(foo)
end
end,
try << << (E(V))/binary >> || V <- [1,2,3,a] >>
catch foo -> ok
end
end,
"begin
E = fun(N) ->
if is_integer(N) -> <<N/integer>>;
true -> throw(foo)
end
end,
try << << (E(V))/binary >> || V <- [1,2,3,a] >>
catch foo -> ok
end
end.",
ok),
?line check(
fun() ->
E = fun(N) ->
if
is_integer(N) -> <<N/integer>>;
true -> erlang:error(foo)
end
end,
try << << (E(V))/binary >> || V <- [1,2,3,a] >>
catch error:foo -> ok
end
end,
"begin
E = fun(N) ->
if is_integer(N) -> <<N/integer>>;
true -> erlang:error(foo)
end
end,
try << << (E(V))/binary >> || V <- [1,2,3,a] >>
catch error:foo -> ok
end
end.",
ok),
ok.
%% OTP-10622. Bugs.
otp_10622(Config) when is_list(Config) ->
check(fun() -> <<0>> = <<"\x{400}">> end,
"<<0>> = <<\"\\x{400}\">>. ",
<<0>>),
check(fun() -> <<"\x{aa}ff"/utf8>> = <<"\x{aa}ff"/utf8>> end,
"<<\"\\x{aa}ff\"/utf8>> = <<\"\\x{aa}ff\"/utf8>>. ",
<<"Â\xaaff">>),
%% The same bug as last example:
check(fun() -> case <<"foo"/utf8>> of
<<"foo"/utf8>> -> true
end
end,
"case <<\"foo\"/utf8>> of <<\"foo\"/utf8>> -> true end.",
true),
check(fun() -> <<"\x{400}"/utf8>> = <<"\x{400}"/utf8>> end,
"<<\"\\x{400}\"/utf8>> = <<\"\\x{400}\"/utf8>>. ",
<<208,128>>),
error_check("<<\"\\x{aaa}\">> = <<\"\\x{aaa}\">>.",
{badmatch,<<"\xaa">>}),
check(fun() -> [a || <<"\x{aaa}">> <= <<2703:16>>] end,
"[a || <<\"\\x{aaa}\">> <= <<2703:16>>]. ",
[]),
check(fun() -> [a || <<"\x{aa}"/utf8>> <= <<"\x{aa}"/utf8>>] end,
"[a || <<\"\\x{aa}\"/utf8>> <= <<\"\\x{aa}\"/utf8>>]. ",
[a]),
check(fun() -> [a || <<"\x{aa}x"/utf8>> <= <<"\x{aa}y"/utf8>>] end,
"[a || <<\"\\x{aa}x\"/utf8>> <= <<\"\\x{aa}y\"/utf8>>]. ",
[]),
check(fun() -> [a || <<"\x{aaa}">> <= <<"\x{aaa}">>] end,
"[a || <<\"\\x{aaa}\">> <= <<\"\\x{aaa}\">>]. ",
[]),
check(fun() -> [a || <<"\x{aaa}"/utf8>> <= <<"\x{aaa}"/utf8>>] end,
"[a || <<\"\\x{aaa}\"/utf8>> <= <<\"\\x{aaa}\"/utf8>>]. ",
[a]),
ok.
%% OTP-13228. ERL-32: non-local function handler bug.
otp_13228(_Config) ->
LFH = {value, fun(foo, [io_fwrite]) -> worked end},
EFH = {value, fun({io, fwrite}, [atom]) -> io_fwrite end},
{value, worked, []} = parse_and_run("foo(io:fwrite(atom)).", LFH, EFH).
%% Simple cases, just to cover some code.
funs(Config) when is_list(Config) ->
do_funs(none, none),
do_funs(lfh(), none),
do_funs(lfh(), efh()),
?line error_check("nix:foo().", {access_not_allowed,nix}, lfh(), efh()),
?line error_check("bar().", undef, none, none),
?line check(fun() -> F1 = fun(F,N) -> ?MODULE:count_down(F, N) end,
F1(F1, 1000) end,
"begin F1 = fun(F,N) -> count_down(F, N) end,"
"F1(F1,1000) end.",
0, ['F1'], lfh(), none),
?line check(fun() -> F1 = fun(F,N) -> ?MODULE:count_down(F, N) end,
F1(F1, 1000) end,
"begin F1 = fun(F,N) -> count_down(F, N) end,"
"F1(F1,1000) end.",
0, ['F1'], lfh_value(), none),
?line check(fun() -> F1 = fun(F,N) -> ?MODULE:count_down(F, N) end,
F1(F1, 1000) end,
"begin F1 = fun(F,N) -> count_down(F, N) end,"
"F1(F1,1000) end.",
0, ['F1'], lfh_value_extra(), none),
?line check(fun() -> F1 = fun(F,N) -> ?MODULE:count_down(F, N) end,
F1(F1, 1000) end,
"begin F1 = fun(F,N) -> count_down(F, N) end,"
"F1(F1,1000) end.",
0, ['F1'], {?MODULE,local_func_value}, none),
%% This is not documented, and only for backward compatibility (good!).
B0 = erl_eval:new_bindings(),
?line check(fun() -> is_function(?MODULE:count_down_fun()) end,
"begin is_function(count_down_fun()) end.",
true, [], {?MODULE,local_func,[B0]},none),
EF = fun({timer,sleep}, As) when length(As) == 1 -> exit({got_it,sleep});
({M,F}, As) -> apply(M, F, As)
end,
EFH = {value, EF},
?line error_check("apply(timer, sleep, [1]).", got_it, none, EFH),
?line error_check("begin F = fun(T) -> timer:sleep(T) end,F(1) end.",
got_it, none, EFH),
?line error_check("fun c/1.", undef),
?line error_check("fun a:b/0().", undef),
MaxArgs = 20,
?line [true] =
lists:usort([run_many_args(SAs) || SAs <- many_args(MaxArgs)]),
?line {'EXIT',{{argument_limit,_},_}} =
(catch run_many_args(many_args1(MaxArgs+1))),
?line check(fun() -> M = lists, F = fun M:reverse/1,
[1,2] = F([2,1]), ok end,
"begin M = lists, F = fun M:reverse/1,"
" [1,2] = F([2,1]), ok end.",
ok),
%% Test that {M,F} is not accepted as a fun.
error_check("{" ?MODULE_STRING ",module_info}().",
{badfun,{?MODULE,module_info}}),
ok.
run_many_args({S, As}) ->
apply(eval_string(S), As) =:= As.
many_args(N) ->
[many_args1(I) || I <- lists:seq(1, N)].
many_args1(N) ->
F = fun(L, P) ->
tl(lists:flatten([","++P++integer_to_list(E) || E <- L]))
end,
L = lists:seq(1, N),
T = F(L, "V"),
S = lists:flatten(io_lib:format("fun(~s) -> [~s] end.", [T, T])),
{S, L}.
do_funs(LFH, EFH) ->
%% LFH is not really used by these examples...
%% These tests do not prove that tail recursive functions really
%% work (that the process does not grow); one should also run them
%% manually with 1000 replaced by 1000000.
M = atom_to_list(?MODULE),
?line check(fun() -> F1 = fun(F,N) -> ?MODULE:count_down(F, N) end,
F1(F1, 1000) end,
concat(["begin F1 = fun(F,N) -> ", M,
":count_down(F, N) end, F1(F1,1000) end."]),
0, ['F1'], LFH, EFH),
?line check(fun() -> F1 = fun(F,N) -> apply(?MODULE,count_down,[F,N])
end, F1(F1, 1000) end,
concat(["begin F1 = fun(F,N) -> apply(", M,
",count_down,[F, N]) end, F1(F1,1000) end."]),
0, ['F1'], LFH, EFH),
?line check(fun() -> F = fun(F,N) when N > 0 -> apply(F,[F,N-1]);
(_F,0) -> ok end,
F(F, 1000)
end,
"begin F = fun(F,N) when N > 0 -> apply(F,[F,N-1]);"
"(_F,0) -> ok end,"
"F(F, 1000) end.",
ok, ['F'], LFH, EFH),
?line check(fun() -> F = fun(F,N) when N > 0 ->
apply(erlang,apply,[F,[F,N-1]]);
(_F,0) -> ok end,
F(F, 1000)
end,
"begin F = fun(F,N) when N > 0 ->"
"apply(erlang,apply,[F,[F,N-1]]);"
"(_F,0) -> ok end,"
"F(F, 1000) end.",
ok, ['F'], LFH, EFH),
?line check(fun() -> F = count_down_fun(),
SF = fun(SF, F1, N) -> F(SF, F1, N) end,
SF(SF, F, 1000) end,
concat(["begin F = ", M, ":count_down_fun(),"
"SF = fun(SF, F1, N) -> F(SF, F1, N) end,"
"SF(SF, F, 1000) end."]),
ok, ['F','SF'], LFH, EFH),
?line check(fun() -> F = fun(X) -> A = 1+X, {X,A} end,
true = {2,3} == F(2) end,
"begin F = fun(X) -> A = 1+X, {X,A} end,
true = {2,3} == F(2) end.", true, ['F'], LFH, EFH),
check(fun() -> F = fun(X) -> erlang:'+'(X,2) end,
true = 3 == F(1) end,
"begin F = fun(X) -> erlang:'+'(X,2) end,"
" true = 3 == F(1) end.", true, ['F'],
LFH, EFH),
?line check(fun() -> F = fun(X) -> byte_size(X) end,
?MODULE:do_apply(F,<<"hej">>) end,
concat(["begin F = fun(X) -> size(X) end,",
M,":do_apply(F,<<\"hej\">>) end."]),
3, ['F'], LFH, EFH),
?line check(fun() -> F1 = fun(X, Z) -> {X,Z} end,
Z = 5,
F2 = fun(X, Y) -> F1(Z,{X,Y}) end,
F3 = fun(X, Y) -> {a,F1(Z,{X,Y})} end,
{5,{x,y}} = F2(x,y),
{a,{5,{y,x}}} = F3(y,x),
{5,{5,y}} = F2(Z,y),
true = {5,{x,5}} == F2(x,Z) end,
"begin F1 = fun(X, Z) -> {X,Z} end,
Z = 5,
F2 = fun(X, Y) -> F1(Z,{X,Y}) end,
F3 = fun(X, Y) -> {a,F1(Z,{X,Y})} end,
{5,{x,y}} = F2(x,y),
{a,{5,{y,x}}} = F3(y,x),
{5,{5,y}} = F2(Z,y),
true = {5,{x,5}} == F2(x,Z) end.",
true, ['F1','Z','F2','F3'], LFH, EFH),
?line check(fun() -> F = fun(X) -> byte_size(X) end,
F2 = fun(Y) -> F(Y) end,
?MODULE:do_apply(F2,<<"hej">>) end,
concat(["begin F = fun(X) -> size(X) end,",
"F2 = fun(Y) -> F(Y) end,",
M,":do_apply(F2,<<\"hej\">>) end."]),
3, ['F','F2'], LFH, EFH),
?line check(fun() -> Z = 5, F = fun(X) -> {Z,X} end,
F2 = fun(Z) -> F(Z) end, F2(3) end,
"begin Z = 5, F = fun(X) -> {Z,X} end,
F2 = fun(Z) -> F(Z) end, F2(3) end.",
{5,3},['F','F2','Z'], LFH, EFH),
?line check(fun() -> F = fun(Z) -> Z end,
F2 = fun(X) -> F(X), Z = {X,X}, Z end,
{1,1} = F2(1), Z = 7, Z end,
"begin F = fun(Z) -> Z end,
F2 = fun(X) -> F(X), Z = {X,X}, Z end,
{1,1} = F2(1), Z = 7, Z end.", 7, ['F','F2','Z'],
LFH, EFH),
?line check(fun() -> F = fun(F, N) -> [?MODULE:count_down(F,N) || X <-[1]]
end, F(F,2) end,
concat(["begin F = fun(F, N) -> [", M,
":count_down(F,N) || X <-[1]] end, F(F,2) end."]),
[[[0]]], ['F'], LFH, EFH),
ok.
count_down(F, N) when N > 0 ->
F(F, N-1);
count_down(_F, N) ->
N.
count_down_fun() ->
fun(SF,F,N) when N > 0 -> SF(SF,F,N-1);
(_SF,_F,_N) -> ok
end.
do_apply(F, V) ->
F(V).
lfh() ->
{eval, fun(F, As, Bs) -> local_func(F, As, Bs) end}.
local_func(F, As0, Bs0) when is_atom(F) ->
{As,Bs} = erl_eval:expr_list(As0, Bs0, lfh()),
case erlang:function_exported(?MODULE, F, length(As)) of
true ->
{value,apply(?MODULE, F, As),Bs};
false ->
{value,apply(shell_default, F, As),Bs}
end.
lfh_value_extra() ->
%% Not documented.
{value, fun(F, As, a1, a2) -> local_func_value(F, As) end, [a1, a2]}.
lfh_value() ->
{value, fun(F, As) -> local_func_value(F, As) end}.
local_func_value(F, As) when is_atom(F) ->
case erlang:function_exported(?MODULE, F, length(As)) of
true ->
apply(?MODULE, F, As);
false ->
apply(shell_default, F, As)
end.
efh() ->
{value, fun(F, As) -> external_func(F, As) end}.
external_func({M,_}, _As) when M == nix ->
exit({{access_not_allowed,M},[mfa]});
external_func(F, As) when is_function(F) ->
apply(F, As);
external_func({M,F}, As) ->
apply(M, F, As).
%% Test try-of-catch-after-end statement.
try_catch(Config) when is_list(Config) ->
%% Match in of with catch
?line check(fun() -> try 1 of 1 -> 2 catch _:_ -> 3 end end,
"try 1 of 1 -> 2 catch _:_ -> 3 end.", 2),
?line check(fun() -> try 1 of 1 -> 2; 3 -> 4 catch _:_ -> 5 end end,
"try 1 of 1 -> 2; 3 -> 4 catch _:_ -> 5 end.", 2),
?line check(fun() -> try 3 of 1 -> 2; 3 -> 4 catch _:_ -> 5 end end,
"try 3 of 1 -> 2; 3 -> 4 catch _:_ -> 5 end.", 4),
%% Just after
?line check(fun () -> X = try 1 after put(try_catch, 2) end,
{X,get(try_catch)} end,
"begin X = try 1 after put(try_catch, 2) end, "
"{X,get(try_catch)} end.", {1,2}),
%% Match in of with after
?line check(fun() -> X = try 1 of 1 -> 2 after put(try_catch, 3) end,
{X,get(try_catch)} end,
"begin X = try 1 of 1 -> 2 after put(try_catch, 3) end, "
"{X,get(try_catch)} end.", {2,3}),
?line check(fun() -> X = try 1 of 1 -> 2; 3 -> 4
after put(try_catch, 5) end,
{X,get(try_catch)} end,
"begin X = try 1 of 1 -> 2; 3 -> 4 "
" after put(try_catch, 5) end, "
" {X,get(try_catch)} end.", {2,5}),
?line check(fun() -> X = try 3 of 1 -> 2; 3 -> 4
after put(try_catch, 5) end,
{X,get(try_catch)} end,
"begin X = try 3 of 1 -> 2; 3 -> 4 "
" after put(try_catch, 5) end, "
" {X,get(try_catch)} end.", {4,5}),
%% Nomatch in of
?line error_check("try 1 of 2 -> 3 catch _:_ -> 4 end.",
{try_clause,1}),
%% Nomatch in of with after
?line check(fun () -> {'EXIT',{{try_clause,1},_}} =
begin catch try 1 of 2 -> 3
after put(try_catch, 4) end end,
get(try_catch) end,
"begin {'EXIT',{{try_clause,1},_}} = "
" begin catch try 1 of 2 -> 3 "
" after put(try_catch, 4) end end, "
" get(try_catch) end. ", 4),
%% Exception in try
?line check(fun () -> try 1=2 catch error:{badmatch,2} -> 3 end end,
"try 1=2 catch error:{badmatch,2} -> 3 end.", 3),
?line check(fun () -> try 1=2 of 3 -> 4
catch error:{badmatch,2} -> 5 end end,
"try 1=2 of 3 -> 4 "
"catch error:{badmatch,2} -> 5 end.", 5),
%% Exception in try with after
?line check(fun () -> X = try 1=2
catch error:{badmatch,2} -> 3
after put(try_catch, 4) end,
{X,get(try_catch)} end,
"begin X = try 1=2 "
" catch error:{badmatch,2} -> 3 "
" after put(try_catch, 4) end, "
" {X,get(try_catch)} end. ", {3,4}),
?line check(fun () -> X = try 1=2 of 3 -> 4
catch error:{badmatch,2} -> 5
after put(try_catch, 6) end,
{X,get(try_catch)} end,
"begin X = try 1=2 of 3 -> 4"
" catch error:{badmatch,2} -> 5 "
" after put(try_catch, 6) end, "
" {X,get(try_catch)} end. ", {5,6}),
%% Uncaught exception
?line error_check("try 1=2 catch error:undefined -> 3 end. ",
{badmatch,2}),
?line error_check("try 1=2 of 3 -> 4 catch error:undefined -> 5 end. ",
{badmatch,2}),
%% Uncaught exception with after
?line check(fun () -> {'EXIT',{{badmatch,2},_}} =
begin catch try 1=2
after put(try_catch, 3) end end,
get(try_catch) end,
"begin {'EXIT',{{badmatch,2},_}} = "
" begin catch try 1=2 "
" after put(try_catch, 3) end end, "
" get(try_catch) end. ", 3),
?line check(fun () -> {'EXIT',{{badmatch,2},_}} =
begin catch try 1=2 of 3 -> 4
after put(try_catch, 5) end end,
get(try_catch) end,
"begin {'EXIT',{{badmatch,2},_}} = "
" begin catch try 1=2 of 3 -> 4"
" after put(try_catch, 5) end end, "
" get(try_catch) end. ", 5),
?line check(fun () -> {'EXIT',{{badmatch,2},_}} =
begin catch try 1=2 catch error:undefined -> 3
after put(try_catch, 4) end end,
get(try_catch) end,
"begin {'EXIT',{{badmatch,2},_}} = "
" begin catch try 1=2 catch error:undefined -> 3 "
" after put(try_catch, 4) end end, "
" get(try_catch) end. ", 4),
?line check(fun () -> {'EXIT',{{badmatch,2},_}} =
begin catch try 1=2 of 3 -> 4
catch error:undefined -> 5
after put(try_catch, 6) end end,
get(try_catch) end,
"begin {'EXIT',{{badmatch,2},_}} = "
" begin catch try 1=2 of 3 -> 4 "
" catch error:undefined -> 5 "
" after put(try_catch, 6) end end, "
" get(try_catch) end. ", 6),
ok.
%% OTP-7933.
eval_expr_5(Config) when is_list(Config) ->
?line {ok,Tokens ,_} =
erl_scan:string("if a+4 == 4 -> yes; true -> no end. "),
?line {ok, [Expr]} = erl_parse:parse_exprs(Tokens),
?line {value, no, []} = erl_eval:expr(Expr, [], none, none, none),
?line no = erl_eval:expr(Expr, [], none, none, value),
try
erl_eval:expr(Expr, [], none, none, 4711),
?line function_clause = should_never_reach_here
catch
error:function_clause ->
ok
end.
zero_width(Config) when is_list(Config) ->
?line check(fun() ->
{'EXIT',{badarg,_}} = (catch <<not_a_number:0>>),
ok
end, "begin {'EXIT',{badarg,_}} = (catch <<not_a_number:0>>), "
"ok end.", ok),
ok.
eep37(Config) when is_list(Config) ->
check(fun () -> (fun _(X) -> X end)(42) end,
"(fun _(X) -> X end)(42).",
42),
check(fun () -> (fun _Id(X) -> X end)(42) end,
"(fun _Id(X) -> X end)(42).", 42),
check(fun () -> is_function((fun Self() -> Self end)(), 0) end,
"is_function((fun Self() -> Self end)(), 0).",
true),
check(fun () ->
F = fun Fact(N) when N > 0 ->
N * Fact(N - 1);
Fact(0) ->
1
end,
F(6)
end,
"(fun Fact(N) when N > 0 -> N * Fact(N - 1); Fact(0) -> 1 end)(6).",
720),
ok.
eep43(Config) when is_list(Config) ->
check(fun () -> #{} end, " #{}.", #{}),
check(fun () -> #{a => b} end, "#{a => b}.", #{a => b}),
check(fun () ->
Map = #{a => b},
{Map#{a := b},Map#{a => c},Map#{d => e}}
end,
"begin "
" Map = #{a => B=b}, "
" {Map#{a := B},Map#{a => c},Map#{d => e}} "
"end.",
{#{a => b},#{a => c},#{a => b,d => e}}),
check(fun () ->
lists:map(fun (X) -> X#{price := 0} end,
[#{hello => 0, price => nil}])
end,
"lists:map(fun (X) -> X#{price := 0} end,
[#{hello => 0, price => nil}]).",
[#{hello => 0, price => 0}]),
check(fun () ->
Map = #{ <<33:333>> => "wat" },
#{ <<33:333>> := "wat" } = Map
end,
"begin "
" Map = #{ <<33:333>> => \"wat\" }, "
" #{ <<33:333>> := \"wat\" } = Map "
"end.",
#{ <<33:333>> => "wat" }),
check(fun () ->
K1 = 1,
K2 = <<42:301>>,
K3 = {3,K2},
Map = #{ K1 => 1, K2 => 2, K3 => 3, {2,2} => 4},
#{ K1 := 1, K2 := 2, K3 := 3, {2,2} := 4} = Map
end,
"begin "
" K1 = 1, "
" K2 = <<42:301>>, "
" K3 = {3,K2}, "
" Map = #{ K1 => 1, K2 => 2, K3 => 3, {2,2} => 4}, "
" #{ K1 := 1, K2 := 2, K3 := 3, {2,2} := 4} = Map "
"end.",
#{ 1 => 1, <<42:301>> => 2, {3,<<42:301>>} => 3, {2,2} => 4}),
check(fun () ->
X = key,
(fun(#{X := value}) -> true end)(#{X => value})
end,
"begin "
" X = key, "
" (fun(#{X := value}) -> true end)(#{X => value}) "
"end.",
true),
error_check("[camembert]#{}.", {badmap,[camembert]}),
error_check("[camembert]#{nonexisting:=v}.", {badmap,[camembert]}),
error_check("#{} = 1.", {badmatch,1}),
error_check("[]#{a=>error(bad)}.", bad),
error_check("(#{})#{nonexisting:=value}.", {badkey,nonexisting}),
ok.
%% Check the string in different contexts: as is; in fun; from compiled code.
check(F, String, Result) ->
check1(F, String, Result),
FunString = concat(["fun() -> ", no_final_dot(String), " end(). "]),
check1(F, FunString, Result),
CompileString = concat(["hd(lists:map(fun(_) -> ", no_final_dot(String),
" end, [foo])). "]),
check1(F, CompileString, Result).
check1(F, String, Result) ->
Result = F(),
case catch parse_and_run(String) of
{value, Result, _} ->
ok;
Other ->
ct:fail({eval, Other, Result})
end.
check(F, String, Result, BoundVars, LFH, EFH) ->
Result = F(),
case catch parse_and_run(String, LFH, EFH) of
{value, Result, Bs} ->
%% We just assume that Bs is an orddict...
Keys = orddict:fetch_keys(Bs),
case sort(BoundVars) == Keys of
true ->
ok;
false ->
ct:fail({check, BoundVars, Keys})
end,
ok;
Other ->
ct:fail({check, Other, Result})
end.
error_check(String, Result) ->
case catch parse_and_run(String) of
{'EXIT', {Result,_}} ->
ok;
Other ->
ct:fail({eval, Other, Result})
end.
error_check(String, Result, LFH, EFH) ->
case catch parse_and_run(String, LFH, EFH) of
{'EXIT', {Result,_}} ->
ok;
Other ->
ct:fail({eval, Other, Result})
end.
eval_string(String) ->
{value, Result, _} = parse_and_run(String),
Result.
parse_and_run(String) ->
{ok,Tokens,_} = erl_scan:string(String),
{ok, [Expr]} = erl_parse:parse_exprs(Tokens),
erl_eval:expr(Expr, []).
parse_and_run(String, LFH, EFH) ->
{ok,Tokens,_} = erl_scan:string(String),
{ok, [Expr]} = erl_parse:parse_exprs(Tokens),
erl_eval:expr(Expr, [], LFH, EFH).
no_final_dot(S) ->
case lists:reverse(S) of
" ." ++ R -> lists:reverse(R);
"." ++ R -> lists:reverse(R);
_ -> S
end.
