1: %%
    2: %% %CopyrightBegin%
    3: %%
    4: %% Copyright Ericsson AB 2003-2013. All Rights Reserved.
    5: %%
    6: %% The contents of this file are subject to the Erlang Public License,
    7: %% Version 1.1, (the "License"); you may not use this file except in
    8: %% compliance with the License. You should have received a copy of the
    9: %% Erlang Public License along with this software. If not, it can be
   10: %% retrieved online at http://www.erlang.org/.
   11: %%
   12: %% Software distributed under the License is distributed on an "AS IS"
   13: %% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
   14: %% the License for the specific language governing rights and limitations
   15: %% under the License.
   16: %%
   17: %% %CopyrightEnd%
   18: 
   19: -module(erl_eval_SUITE).
   20: -export([all/0, suite/0,groups/0,init_per_suite/1, end_per_suite/1, 
   21: 	 init_per_group/2,end_per_group/2]).
   22: 
   23: -export([guard_1/1, guard_2/1,
   24: 	 match_pattern/1,
   25: 	 match_bin/1,
   26: 	 string_plusplus/1,
   27: 	 pattern_expr/1,
   28:          guard_3/1, guard_4/1,
   29:          lc/1,
   30:          simple_cases/1,
   31:          unary_plus/1,
   32:          apply_atom/1,
   33:          otp_5269/1,
   34:          otp_6539/1,
   35:          otp_6543/1,
   36:          otp_6787/1,
   37:          otp_6977/1,
   38: 	 otp_7550/1,
   39:          otp_8133/1,
   40:          funs/1,
   41: 	 try_catch/1,
   42: 	 eval_expr_5/1]).
   43: 
   44: %%
   45: %% Define to run outside of test server
   46: %%
   47: %%-define(STANDALONE,1).
   48: 
   49: -import(lists,[concat/1, sort/1]).
   50: 
   51: -export([count_down/2, count_down_fun/0, do_apply/2,
   52:          local_func/3, local_func_value/2]).
   53: 
   54: -ifdef(STANDALONE).
   55: -define(config(A,B),config(A,B)).
   56: -export([config/2]).
   57: -define(line, noop, ).
   58: config(priv_dir,_) ->
   59:     ".".
   60: -else.
   61: -include_lib("test_server/include/test_server.hrl").
   62: -export([init_per_testcase/2, end_per_testcase/2]).
   63: % Default timetrap timeout (set in init_per_testcase).
   64: -define(default_timeout, ?t:minutes(1)).
   65: init_per_testcase(_Case, Config) ->
   66:     ?line Dog = ?t:timetrap(?default_timeout),
   67:     [{watchdog, Dog} | Config].
   68: end_per_testcase(_Case, Config) ->
   69:     Dog = ?config(watchdog, Config),
   70:     test_server:timetrap_cancel(Dog),
   71:     ok.
   72: -endif.
   73: 
   74: suite() -> [{ct_hooks,[ts_install_cth]}].
   75: 
   76: all() -> 
   77:     [guard_1, guard_2, match_pattern, string_plusplus,
   78:      pattern_expr, match_bin, guard_3, guard_4, lc,
   79:      simple_cases, unary_plus, apply_atom, otp_5269,
   80:      otp_6539, otp_6543, otp_6787, otp_6977, otp_7550,
   81:      otp_8133, funs, try_catch, eval_expr_5].
   82: 
   83: groups() -> 
   84:     [].
   85: 
   86: init_per_suite(Config) ->
   87:     Config.
   88: 
   89: end_per_suite(_Config) ->
   90:     ok.
   91: 
   92: init_per_group(_GroupName, Config) ->
   93:     Config.
   94: 
   95: end_per_group(_GroupName, Config) ->
   96:     Config.
   97: 
   98: 
   99: guard_1(doc) ->
  100:     ["(OTP-2405)"];
  101: guard_1(suite) ->
  102:     [];
  103: guard_1(Config) when is_list(Config) ->
  104:     ?line {ok,Tokens ,_} =
  105: 	erl_scan:string("if a+4 == 4 -> yes; true -> no end. "),
  106:     ?line {ok, [Expr]} = erl_parse:parse_exprs(Tokens),
  107:     ?line no = guard_1_compiled(),
  108:     ?line {value, no, []} = erl_eval:expr(Expr, []),
  109:     ok.
  110: 
  111: guard_1_compiled() ->
  112:     if a+4 == 4 -> yes; true -> no end.
  113: 
  114: guard_2(doc) ->
  115:     ["Similar to guard_1, but type-correct"];
  116: guard_2(suite) ->
  117:     [];
  118: guard_2(Config) when is_list(Config) ->
  119:     ?line {ok,Tokens ,_} =
  120: 	erl_scan:string("if 6+4 == 4 -> yes; true -> no end. "),
  121:     ?line {ok, [Expr]} = erl_parse:parse_exprs(Tokens),
  122:     ?line no = guard_2_compiled(),
  123:     ?line {value, no, []} = erl_eval:expr(Expr, []),
  124:     ok.
  125: 
  126: guard_2_compiled() ->
  127:     if 6+4 == 4 -> yes; true -> no end.
  128: 
  129: string_plusplus(doc) ->
  130:     ["OTP-3069: syntactic sugar string ++ ..."];
  131: string_plusplus(suite) ->
  132:     [];
  133: string_plusplus(Config) when is_list(Config) ->
  134:     ?line check(fun() -> case "abc" of "ab" ++ L -> L end end,
  135: 		"case \"abc\" of \"ab\" ++ L -> L end. ",
  136: 		"c"),
  137:     ?line check(fun() -> case "abcde" of "ab" ++ "cd" ++ L -> L end end,
  138: 		"case \"abcde\" of \"ab\" ++ \"cd\" ++ L -> L end. ",
  139: 		"e"),
  140:     ?line check(fun() -> case "abc" of [97, 98] ++ L -> L end end,
  141: 		"case \"abc\" of [97, 98] ++ L -> L end. ",
  142: 		"c"),
  143:     ok.
  144: 
  145: match_pattern(doc) ->
  146:     ["OTP-2983: match operator in pattern"];
  147: match_pattern(suite) ->
  148:     [];
  149: match_pattern(Config) when is_list(Config) ->
  150:     ?line check(fun() -> case {a, b} of {a, _X}=Y -> {x,Y} end end,
  151: 		"case {a, b} of {a, X}=Y -> {x,Y} end. ",
  152: 		{x, {a, b}}),
  153:     ?line check(fun() -> case {a, b} of Y={a, _X} -> {x,Y} end end,
  154: 		"case {a, b} of Y={a, X} -> {x,Y} end. ",
  155: 		{x, {a, b}}),
  156:     ?line check(fun() -> case {a, b} of Y={a, _X}=Z -> {Z,Y} end end,
  157: 		"case {a, b} of Y={a, X}=Z -> {Z,Y} end. ",
  158: 		{{a, b}, {a, b}}),
  159:     ?line check(fun() -> A = 4, B = 28, <<13:(A+(X=B))>>, X end,
  160:                 "begin A = 4, B = 28, <<13:(A+(X=B))>>, X end.",
  161:                 28),
  162:     ok.
  163: 
  164: match_bin(doc) ->
  165:     ["binary match problems"];
  166: match_bin(suite) ->
  167:     [];
  168: match_bin(Config) when is_list(Config) ->
  169:     ?line check(fun() -> <<"abc">> = <<"abc">> end,
  170: 		"<<\"abc\">> = <<\"abc\">>. ",
  171: 		<<"abc">>),
  172:     ?line check(fun() ->
  173: 			<<Size,B:Size/binary,Rest/binary>> = <<2,"AB","CD">>,
  174: 			{Size,B,Rest}
  175: 		end,
  176: 		"begin <<Size,B:Size/binary,Rest/binary>> = <<2,\"AB\",\"CD\">>, "
  177: 		"{Size,B,Rest} end. ",
  178: 		{2,<<"AB">>,<<"CD">>}),
  179:     ok.
  180: 
  181: pattern_expr(doc) ->
  182:     ["OTP-3144: compile-time expressions in pattern"];
  183: pattern_expr(suite) ->
  184:     [];
  185: pattern_expr(Config) when is_list(Config) ->
  186:     ?line check(fun() -> case 4 of 2+2 -> ok end end,
  187: 		"case 4 of 2+2 -> ok end. ",
  188: 		ok),
  189:     ?line check(fun() -> case 2 of +2 -> ok end end,
  190: 		"case 2 of +2 -> ok end. ",
  191: 		ok),
  192:     ok.
  193: 
  194: guard_3(doc) ->
  195:     ["OTP-4518."];
  196: guard_3(suite) ->
  197:     [];
  198: guard_3(Config) when is_list(Config) ->
  199:     ?line check(fun() -> if false -> false; true -> true end end,
  200:                 "if false -> false; true -> true end.",
  201:                 true),
  202:     ?line check(fun() -> if <<"hej">> == <<"hopp">> -> true;
  203:                             true -> false end end,
  204:                 "begin if <<\"hej\">> == <<\"hopp\">> -> true;
  205:                           true -> false end end.",
  206:                 false),
  207:     ?line check(fun() -> if <<"hej">> == <<"hej">> -> true;
  208:                             true -> false end end,
  209:                 "begin if <<\"hej\">> == <<\"hej\">> -> true;
  210:                           true -> false end end.",
  211:                 true),
  212:     ok.
  213: 
  214: guard_4(doc) ->
  215:     ["OTP-4885."];
  216: guard_4(suite) ->
  217:     [];
  218: guard_4(Config) when is_list(Config) ->
  219:     check(fun() -> if erlang:'+'(3,a) -> true ; true -> false end end,
  220: 	  "if erlang:'+'(3,a) -> true ; true -> false end.",
  221: 	  false),
  222:     check(fun() -> if erlang:is_integer(3) -> true ; true -> false end
  223: 	  end,
  224: 	  "if erlang:is_integer(3) -> true ; true -> false end.",
  225: 	  true),
  226:     ?line check(fun() -> [X || X <- [1,2,3], erlang:is_integer(X)] end,
  227:                 "[X || X <- [1,2,3], erlang:is_integer(X)].",
  228:                 [1,2,3]),
  229:     ?line check(fun() -> if is_atom(is_integer(a)) -> true ; true -> false end
  230:                 end,
  231:                 "if is_atom(is_integer(a)) -> true ; true -> false end.",
  232:                 true),
  233:     check(fun() -> if erlang:is_atom(erlang:is_integer(a)) -> true;
  234: 		      true -> false end end,
  235: 	  "if erlang:is_atom(erlang:is_integer(a)) -> true; "
  236: 	  "true -> false end.",
  237: 	  true),
  238:     ?line check(fun() -> if is_atom(3+a) -> true ; true -> false end end,
  239:                 "if is_atom(3+a) -> true ; true -> false end.",
  240:                 false),
  241:     ?line check(fun() -> if erlang:is_atom(3+a) -> true ; true -> false end
  242:                 end,
  243:                 "if erlang:is_atom(3+a) -> true ; true -> false end.",
  244:                 false),
  245:     ok.
  246: 
  247: 
  248: lc(doc) ->
  249:     ["OTP-4518."];
  250: lc(suite) ->
  251:     [];
  252: lc(Config) when is_list(Config) ->
  253:     ?line check(fun() -> X = 32, [X || X <- [1,2,3]] end,
  254:                 "begin X = 32, [X || X <- [1,2,3]] end.",
  255:                 [1,2,3]),
  256:     ?line check(fun() -> X = 32,
  257:                          [X || <<X:X>> <- [<<1:32>>,<<2:32>>,<<3:8>>]] end,
  258:     %% "binsize variable"          ^
  259:                 "begin X = 32,
  260:                  [X || <<X:X>> <- [<<1:32>>,<<2:32>>,<<3:8>>]] end.",
  261:                 [1,2]),
  262:     ?line check(fun() -> Y = 13,[X || {X,Y} <- [{1,2}]] end,
  263:                 "begin Y = 13,[X || {X,Y} <- [{1,2}]] end.",
  264:                 [1]),
  265:     ?line error_check("begin [A || X <- [{1,2}], 1 == A] end.",
  266:                       {unbound_var,'A'}),
  267:     ?line error_check("begin X = 32,
  268:                         [{Y,W} || X <- [1,2,32,Y=4], Z <- [1,2,W=3]] end.",
  269:                       {unbound_var,'Y'}),
  270:     ?line error_check("begin X = 32,<<A:B>> = <<100:X>> end.",
  271:                       {unbound_var,'B'}),
  272:     ?line check(fun() -> [X || X <- [1,2,3,4], not (X < 2)] end,
  273:                 "begin [X || X <- [1,2,3,4], not (X < 2)] end.",
  274:                 [2,3,4]),
  275:     ?line check(fun() -> [X || X <- [true,false], X] end,
  276:                 "[X || X <- [true,false], X].", [true]),
  277:     ok.
  278: 
  279: simple_cases(doc) ->
  280:     ["Simple cases, just to cover some code."];
  281: simple_cases(suite) ->
  282:     [];
  283: simple_cases(Config) when is_list(Config) ->
  284:     ?line check(fun() -> A = $C end, "A = $C.", $C),
  285:     %% ?line check(fun() -> A = 3.14 end, "A = 3.14.", 3.14),
  286:     ?line check(fun() -> self() ! a, A = receive a -> true end end,
  287:                 "begin self() ! a, A = receive a -> true end end.",
  288:                 true),
  289:     ?line check(fun() -> c:flush(), self() ! a, self() ! b, self() ! c,
  290:                          receive b -> b end,
  291:                          {messages, [a,c]} =
  292:                              erlang:process_info(self(), messages),
  293:                          c:flush() end,
  294:                 "begin c:flush(), self() ! a, self() ! b, self() ! c,"
  295:                 "receive b -> b end,"
  296:                 "{messages, [a,c]} ="
  297:                 "     erlang:process_info(self(), messages), c:flush() end.",
  298:                 ok),
  299:     ?line check(fun() -> self() ! a, A = receive a -> true
  300:                                          after 0 -> false end end,
  301:                 "begin self() ! a, A = receive a -> true"
  302:                 "                      after 0 -> false end end.",
  303:                 true),
  304:     ?line check(fun() -> c:flush(), self() ! a, self() ! b, self() ! c,
  305:                          receive b -> b after 0 -> true end,
  306:                          {messages, [a,c]} =
  307:                              erlang:process_info(self(), messages),
  308:                          c:flush() end,
  309:                 "begin c:flush(), self() ! a, self() ! b, self() ! c,"
  310:                 "receive b -> b after 0 -> true end,"
  311:                 "{messages, [a,c]} ="
  312:                 "     erlang:process_info(self(), messages), c:flush() end.",
  313:                 ok),
  314:     ?line check(fun() -> receive _ -> true after 10 -> false end end,
  315:                 "receive _ -> true after 10 -> false end.",
  316:                 false),
  317:     ?line check(fun() -> F = fun(A) -> A end, true = 3 == F(3) end,
  318:                 "begin F = fun(A) -> A end, true = 3 == F(3) end.",
  319:                 true),
  320:     ?line check(fun() -> F = fun(A) -> A end, true = 3 == apply(F, [3]) end,
  321:                 "begin F = fun(A) -> A end, true = 3 == apply(F,[3]) end.",
  322:                 true),
  323:     ?line check(fun() -> catch throw(a) end, "catch throw(a).", a),
  324:     ?line check(fun() -> catch a end, "catch a.", a),
  325:     ?line check(fun() -> 4 == 3 end, "4 == 3.", false),
  326:     ?line check(fun() -> not true end, "not true.", false),
  327:     ?line check(fun() -> -3 end, "-3.", -3),
  328: 
  329:     ?line error_check("3.0 = 4.0.", {badmatch,4.0}),
  330:     ?line check(fun() -> <<(3.0+2.0):32/float>> = <<5.0:32/float>> end,
  331:                 "<<(3.0+2.0):32/float>> = <<5.0:32/float>>.",
  332:                 <<5.0:32/float>>),
  333: 
  334:     ?line check(fun() -> false andalso kludd end, "false andalso kludd.",
  335:                 false),
  336:     ?line check(fun() -> true andalso true end, "true andalso true.",
  337:                 true),
  338:     ?line check(fun() -> true andalso false end, "true andalso false.",
  339:                 false),
  340:     ?line check(fun() -> true andalso kludd end, "true andalso kludd.",
  341:                 kludd),
  342:     ?line error_check("kladd andalso kludd.", {badarg,kladd}),
  343: 
  344:     ?line check(fun() -> if false andalso kludd -> a; true -> b end end,
  345:                 "if false andalso kludd -> a; true -> b end.",
  346:                 b),
  347:     ?line check(fun() -> if true andalso true -> a; true -> b end end,
  348:                 "if true andalso true -> a; true -> b end.",
  349:                 a),
  350:     ?line check(fun() -> if true andalso false -> a; true -> b end end,
  351:                 "if true andalso false -> a; true -> b end.",
  352:                 b),
  353: 
  354:     ?line check(fun() -> true orelse kludd end,
  355:                 "true orelse kludd.", true),
  356:     ?line check(fun() -> false orelse false end,
  357:                 "false orelse false.", false),
  358:     ?line check(fun() -> false orelse true end,
  359:                 "false orelse true.", true),
  360:     ?line check(fun() -> false orelse kludd end,
  361:                 "false orelse kludd.", kludd),
  362:     ?line error_check("kladd orelse kludd.", {badarg,kladd}),
  363:     ?line error_check("[X || X <- [1,2,3], begin 1 end].",{bad_filter,1}),
  364:     ?line error_check("[X || X <- a].",{bad_generator,a}),
  365: 
  366:     ?line check(fun() -> if true orelse kludd -> a; true -> b end end,
  367:                 "if true orelse kludd -> a; true -> b end.", a),
  368:     ?line check(fun() -> if false orelse false -> a; true -> b end end,
  369:                 "if false orelse false -> a; true -> b end.", b),
  370:     ?line check(fun() -> if false orelse true -> a; true -> b end end,
  371:                 "if false orelse true -> a; true -> b end.", a),
  372: 
  373:     ?line check(fun() -> [X || X <- [1,2,3], X+2] end,
  374:                 "[X || X <- [1,2,3], X+2].", []),
  375: 
  376:     ?line check(fun() -> [X || X <- [1,2,3], [X] == [X || X <- [2]]] end,
  377:                 "[X || X <- [1,2,3], [X] == [X || X <- [2]]].",
  378:                 [2]),
  379:     ?line check(fun() -> F = fun(1) -> ett; (2) -> zwei end,
  380:                          ett = F(1), zwei = F(2) end,
  381:                 "begin F = fun(1) -> ett; (2) -> zwei end,
  382:                          ett = F(1), zwei = F(2) end.",
  383:                 zwei),
  384:     ?line check(fun() -> F = fun(X) when X == 1 -> ett;
  385:                                 (X) when X == 2 -> zwei end,
  386:                          ett = F(1), zwei = F(2) end,
  387:                 "begin F = fun(X) when X == 1 -> ett;
  388:                               (X) when X == 2 -> zwei end,
  389:                          ett = F(1), zwei = F(2) end.",
  390:                 zwei),
  391:     ?line error_check("begin F = fun(1) -> ett end, zwei = F(2) end.",
  392:                       function_clause),
  393:     ?line check(fun() -> if length([1]) == 1 -> yes;
  394:                             true -> no end end,
  395:                 "if length([1]) == 1 -> yes;
  396:                             true -> no end.",
  397:                 yes),
  398:     ?line check(fun() -> if is_integer(3) -> true; true -> false end end,
  399:                 "if is_integer(3) -> true; true -> false end.", true),
  400:     ?line check(fun() -> if integer(3) -> true; true -> false end end,
  401:                 "if integer(3) -> true; true -> false end.", true),
  402:     ?line check(fun() -> if is_float(3) -> true; true -> false end end,
  403:                 "if is_float(3) -> true; true -> false end.", false),
  404:     ?line check(fun() -> if float(3) -> true; true -> false end end,
  405:                 "if float(3) -> true; true -> false end.", false),
  406:     ?line check(fun() -> if is_number(3) -> true; true -> false end end,
  407:                 "if is_number(3) -> true; true -> false end.", true),
  408:     ?line check(fun() -> if number(3) -> true; true -> false end end,
  409:                 "if number(3) -> true; true -> false end.", true),
  410:     ?line check(fun() -> if is_atom(a) -> true; true -> false end end,
  411:                 "if is_atom(a) -> true; true -> false end.", true),
  412:     ?line check(fun() -> if atom(a) -> true; true -> false end end,
  413:                 "if atom(a) -> true; true -> false end.", true),
  414:     ?line check(fun() -> if is_list([]) -> true; true -> false end end,
  415:                 "if is_list([]) -> true; true -> false end.", true),
  416:     ?line check(fun() -> if list([]) -> true; true -> false end end,
  417:                 "if list([]) -> true; true -> false end.", true),
  418:     ?line check(fun() -> if is_tuple({}) -> true; true -> false end end,
  419:                 "if is_tuple({}) -> true; true -> false end.", true),
  420:     ?line check(fun() -> if tuple({}) -> true; true -> false end end,
  421:                 "if tuple({}) -> true; true -> false end.", true),
  422:     ?line check(fun() -> if is_pid(self()) -> true; true -> false end end,
  423:                 "if is_pid(self()) -> true; true -> false end.", true),
  424:     ?line check(fun() -> if pid(self()) -> true; true -> false end end,
  425:                 "if pid(self()) -> true; true -> false end.", true),
  426:     ?line check(fun() -> R = make_ref(), if is_reference(R) -> true;
  427:                                             true -> false end end,
  428:                 "begin R = make_ref(), if is_reference(R) -> true;"
  429:                 "true -> false end end.", true),
  430:     ?line check(fun() -> R = make_ref(), if reference(R) -> true;
  431:                                             true -> false end end,
  432:                 "begin R = make_ref(), if reference(R) -> true;"
  433:                 "true -> false end end.", true),
  434:     ?line check(fun() -> if is_port(a) -> true; true -> false end end,
  435:                 "if is_port(a) -> true; true -> false end.", false),
  436:     ?line check(fun() -> if port(a) -> true; true -> false end end,
  437:                 "if port(a) -> true; true -> false end.", false),
  438:     ?line check(fun() -> if is_function(a) -> true; true -> false end end,
  439:                 "if is_function(a) -> true; true -> false end.", false),
  440:     ?line check(fun() -> if function(a) -> true; true -> false end end,
  441:                 "if function(a) -> true; true -> false end.", false),
  442:     ?line check(fun() -> if is_binary(<<>>) -> true; true -> false end end,
  443:                 "if is_binary(<<>>) -> true; true -> false end.", true),
  444:     ?line check(fun() -> if binary(<<>>) -> true; true -> false end end,
  445:                 "if binary(<<>>) -> true; true -> false end.", true),
  446:     ?line check(fun() -> if is_integer(a) == true -> yes;
  447:                             true -> no end end,
  448:                 "if is_integer(a) == true -> yes;
  449:                             true -> no end.",
  450:                 no),
  451:     ?line check(fun() -> if [] -> true; true -> false end end,
  452:                 "if [] -> true; true -> false end.", false),
  453:     ?line error_check("if lists:member(1,[1]) -> true; true -> false end.",
  454:                       illegal_guard_expr),
  455:     ?line error_check("if false -> true end.", if_clause),
  456:     ?line check(fun() -> if a+b -> true; true -> false end end,
  457:                 "if a + b -> true; true -> false end.", false),
  458:     ?line check(fun() -> if + b -> true; true -> false end end,
  459:                 "if + b -> true; true -> false end.", false),
  460:     ?line error_check("case foo of bar -> true end.", {case_clause,foo}),
  461:     ?line error_check("case 4 of 2+a -> true; _ -> false end.",
  462:                       illegal_pattern),
  463:     ?line error_check("case 4 of +a -> true; _ -> false end.",
  464:                       illegal_pattern),
  465:     ?line check(fun() -> case a of
  466:                              X when X == b -> one;
  467:                              X when X == a -> two
  468:                          end end,
  469:                 "begin case a of
  470:                              X when X == b -> one;
  471:                              X when X == a -> two
  472:                          end end.", two),
  473:     ?line error_check("3 = 4.", {badmatch,4}),
  474:     ?line error_check("a = 3.", {badmatch,3}),
  475:     %% ?line error_check("3.1 = 2.7.",{badmatch,2.7}),
  476:     ?line error_check("$c = 4.", {badmatch,4}),
  477:     ?line check(fun() -> $c = $c end, "$c = $c.", $c),
  478:     ?line check(fun() -> _ = bar end, "_ = bar.", bar),
  479:     ?line check(fun() -> A = 14, A = 14 end,
  480:                 "begin A = 14, A = 14 end.", 14),
  481:     ?line error_check("begin A = 14, A = 16 end.", {badmatch,16}),
  482:     ?line error_check("\"hej\" = \"san\".", {badmatch,"san"}),
  483:     ?line check(fun() -> "hej" = "hej" end,
  484:                 "\"hej\" = \"hej\".", "hej"),
  485:     ?line error_check("[] = [a].", {badmatch,[a]}),
  486:     ?line check(fun() -> [] = [] end, "[] = [].", []),
  487:     ?line error_check("[a] = [].", {badmatch,[]}),
  488:     ?line error_check("{a,b} = 34.", {badmatch,34}),
  489:     ?line check(fun() -> <<X:7>> = <<8:7>>, X end,
  490: 		"begin <<X:7>> = <<8:7>>, X end.", 8),
  491:     ?line error_check("<<34:32>> = \"hej\".", {badmatch,"hej"}),
  492:     ?line check(fun() -> trunc((1 * 3 div 3 + 4 - 3) / 1) rem 2 end,
  493:                 "begin trunc((1 * 3 div 3 + 4 - 3) / 1) rem 2 end.", 0),
  494:     ?line check(fun() -> (2#101 band 2#10101) bor (2#110 bxor 2#010) end,
  495:                 "(2#101 band 2#10101) bor (2#110 bxor 2#010).", 5),
  496:     ?line check(fun() -> (2#1 bsl 4) + (2#10000 bsr 3) end,
  497:                 "(2#1 bsl 4) + (2#10000 bsr 3).", 18),
  498:     ?line check(fun() -> ((1<3) and ((1 =:= 2) or (1 =/= 2))) xor (1=<2) end,
  499:                 "((1<3) and ((1 =:= 2) or (1 =/= 2))) xor (1=<2).", false),
  500:     ?line check(fun() -> (a /= b) or (2 > 4) or (3 >= 3) end,
  501:                 "(a /= b) or (2 > 4) or (3 >= 3).", true),
  502:     ?line check(fun() -> "hej" ++ "san" =/= "hejsan" -- "san" end,
  503:                 "\"hej\" ++ \"san\" =/= \"hejsan\" -- \"san\".", true),
  504:     ?line check(fun() -> (bnot 1) < -0 end, "(bnot (+1)) < -0.", true),
  505:     ok.
  506: 
  507: unary_plus(doc) ->
  508:     ["OTP-4929. Unary plus rejects non-numbers."];
  509: unary_plus(suite) ->
  510:     [];
  511: unary_plus(Config) when is_list(Config) ->
  512:     ?line check(fun() -> F = fun(X) -> + X end,
  513:                          true = -1 == F(-1) end,
  514:                 "begin F = fun(X) -> + X end,"
  515:                 "      true = -1 == F(-1) end.", true, ['F'], none, none),
  516:     ?line error_check("+a.", badarith),
  517:     ok.
  518: 
  519: apply_atom(doc) ->
  520:     ["OTP-5064. Can no longer apply atoms."];
  521: apply_atom(suite) ->
  522:     [];
  523: apply_atom(Config) when is_list(Config) ->
  524:     ?line error_check("[X || X <- [[1],[2]],
  525:                              begin L = length, L(X) =:= 1 end].",
  526:                       {badfun,length}),
  527:     ok.
  528: 
  529: otp_5269(doc) ->
  530:     ["OTP-5269. Bugs in the bit syntax."];
  531: otp_5269(suite) ->
  532:     [];
  533: otp_5269(Config) when is_list(Config) ->
  534:     ?line check(fun() -> L = 8,
  535:                          F = fun(<<A:L,B:A>>) -> B end,
  536:                          F(<<16:8, 7:16>>)
  537:                 end,
  538:                 "begin
  539:                    L = 8, F = fun(<<A:L,B:A>>) -> B end, F(<<16:8, 7:16>>)
  540:                  end.",
  541:                 7),
  542:     ?line check(fun() -> L = 8,
  543:                          F = fun(<<L:L,B:L>>) -> B end,
  544:                          F(<<16:8, 7:16>>)
  545:                 end,
  546:                 "begin
  547:                    L = 8, F = fun(<<L:L,B:L>>) -> B end, F(<<16:8, 7:16>>)
  548:                  end.",
  549:                 7),
  550:     ?line check(fun() -> L = 8, <<A:L,B:A>> = <<16:8, 7:16>>, B end,
  551:                 "begin L = 8, <<A:L,B:A>> = <<16:8, 7:16>>, B end.",
  552:                 7),
  553:     ?line error_check("begin L = 8, <<L:L,B:L>> = <<16:8, 7:16>> end.",
  554:                       {badmatch,<<16:8,7:16>>}),
  555: 
  556:     ?line error_check("begin <<L:16,L:L>> = <<16:16,8:16>>, L end.",
  557:                       {badmatch, <<16:16,8:16>>}),
  558:     ?line check(fun() -> U = 8, (fun(<<U:U>>) -> U end)(<<32:8>>) end,
  559:                 "begin U = 8, (fun(<<U:U>>) -> U end)(<<32:8>>) end.",
  560:                 32),
  561:     ?line check(fun() -> U = 8, [U || <<U:U>> <- [<<32:8>>]] end,
  562:                 "begin U = 8, [U || <<U:U>> <- [<<32:8>>]] end.",
  563:                 [32]),
  564:     ?line error_check("(fun({3,<<A:32,A:32>>}) -> a end)
  565:                           ({3,<<17:32,19:32>>}).",
  566:                       function_clause),
  567:     ?line check(fun() -> [X || <<A:8,
  568:                                  B:A>> <- [<<16:8,19:16>>],
  569:                                <<X:8>> <- [<<B:8>>]] end,
  570:                 "[X || <<A:8,
  571:                                  B:A>> <- [<<16:8,19:16>>],
  572:                                <<X:8>> <- [<<B:8>>]].",
  573:                 [19]),
  574:     ok.
  575: 
  576: otp_6539(doc) ->
  577:     ["OTP-6539. try/catch bugs."];
  578: otp_6539(suite) ->
  579:     [];
  580: otp_6539(Config) when is_list(Config) ->
  581:     ?line check(fun() ->
  582:                         F = fun(A,B) ->
  583:                                     try A+B
  584:                                     catch _:_ -> dontthinkso
  585:                                     end
  586:                             end,
  587:                         lists:zipwith(F, [1,2], [2,3])
  588:                 end,
  589:                 "begin
  590:                      F = fun(A,B) ->
  591:                                  try A+B
  592:                                  catch _:_ -> dontthinkso
  593:                                  end
  594:                          end,
  595:                      lists:zipwith(F, [1,2], [2,3])
  596:                  end.",
  597:                 [3, 5]),
  598:     ok.
  599: 
  600: otp_6543(doc) ->
  601:     ["OTP-6543. bitlevel binaries."];
  602: otp_6543(suite) ->
  603:     [];
  604: otp_6543(Config) when is_list(Config) ->
  605:     ?line check(fun() ->
  606:                         << <<X>> || <<X>> <- [1,2,3] >>
  607:                 end,
  608:                 "<< <<X>> || <<X>> <- [1,2,3] >>.",
  609:                 <<>>),
  610:     ?line check(fun() ->
  611:                         << <<X>> || X <- [1,2,3] >>
  612:                 end,
  613:                 "<< <<X>> || X <- [1,2,3] >>.",
  614:                 <<1,2,3>>),
  615:     ?line check(fun() ->
  616:                         << <<X:8>> || <<X:2>> <= <<"hej">> >>
  617:                 end,
  618:                 "<< <<X:8>> || <<X:2>> <= <<\"hej\">> >>.",
  619:                 <<1,2,2,0,1,2,1,1,1,2,2,2>>),
  620:     ?line check(fun() ->
  621:                         << <<X:8>> ||
  622:                             <<65,X:4>> <= <<65,7:4,65,3:4,66,8:4>> >>
  623:                 end,
  624:                 "<< <<X:8>> ||
  625:                             <<65,X:4>> <= <<65,7:4,65,3:4,66,8:4>> >>.",
  626:                 <<7,3>>),
  627:     ?line check(fun() -> <<34:18/big>> end,
  628:                 "<<34:18/big>>.",
  629:                 <<0,8,2:2>>),
  630:     ?line check(fun() -> <<34:18/big-unit:2>> end,
  631:                 "<<34:18/big-unit:2>>.",
  632:                 <<0,0,0,2,2:4>>),
  633:     ?line check(fun() -> <<34:18/little>> end,
  634:                 "<<34:18/little>>.",
  635:                 <<34,0,0:2>>),
  636:     ?line case eval_string("<<34:18/native>>.") of
  637:               <<0,8,2:2>> -> ok;
  638:               <<34,0,0:2>> -> ok
  639:           end,
  640:     ?line check(fun() -> <<34:18/big-signed>> end,
  641:                 "<<34:18/big-signed>>.",
  642:                 <<0,8,2:2>>),
  643:     ?line check(fun() -> <<34:18/little-signed>> end,
  644:                 "<<34:18/little-signed>>.",
  645:                 <<34,0,0:2>>),
  646:     ?line case eval_string("<<34:18/native-signed>>.") of
  647:               <<0,8,2:2>> -> ok;
  648:               <<34,0,0:2>> -> ok
  649:           end,
  650:     ?line check(fun() -> <<34:18/big-unsigned>> end,
  651:                 "<<34:18/big-unsigned>>.",
  652:                 <<0,8,2:2>>),
  653:     ?line check(fun() -> <<34:18/little-unsigned>> end,
  654:                 "<<34:18/little-unsigned>>.",
  655:                 <<34,0,0:2>>),
  656:     ?line case eval_string("<<34:18/native-unsigned>>.") of
  657:               <<0,8,2:2>> -> ok;
  658:               <<34,0,0:2>> -> ok
  659:           end,
  660:     ?line check(fun() -> <<3.14:32/float-big>> end,
  661:                 "<<3.14:32/float-big>>.",
  662:                 <<64,72,245,195>>),
  663:     ?line check(fun() -> <<3.14:32/float-little>> end,
  664:                 "<<3.14:32/float-little>>.",
  665:                 <<195,245,72,64>>),
  666:     ?line case eval_string("<<3.14:32/float-native>>.") of
  667:               <<64,72,245,195>> -> ok;
  668:               <<195,245,72,64>> -> ok
  669:           end,
  670:     ?line error_check("<<(<<17,3:2>>)/binary>>.", badarg),
  671:     ?line check(fun() -> <<(<<17,3:2>>)/bitstring>> end,
  672:                 "<<(<<17,3:2>>)/bitstring>>.",
  673:                 <<17,3:2>>),
  674:     ?line check(fun() -> <<(<<17,3:2>>):10/bitstring>> end,
  675:                 "<<(<<17,3:2>>):10/bitstring>>.",
  676:                 <<17,3:2>>),
  677:     ?line check(fun() -> <<<<344:17>>/binary-unit:17>> end,
  678: 		"<<<<344:17>>/binary-unit:17>>.",
  679: 		<<344:17>>),
  680: 
  681:     ?line check(fun() -> <<X:18/big>> = <<34:18/big>>, X end,
  682:                 "begin <<X:18/big>> = <<34:18/big>>, X end.",
  683:                 34),
  684:     ?line check(fun() -> <<X:18/big-unit:2>> = <<34:18/big-unit:2>>, X end,
  685:                 "begin <<X:18/big-unit:2>> = <<34:18/big-unit:2>>, X end.",
  686:                 34),
  687:     ?line check(fun() -> <<X:18/little>> = <<34:18/little>>, X end,
  688:                 "begin <<X:18/little>> = <<34:18/little>>, X end.",
  689:                 34),
  690:     ?line check(fun() -> <<X:18/native>> = <<34:18/native>>, X end,
  691:                 "begin <<X:18/native>> = <<34:18/native>>, X end.",
  692:                 34),
  693:     ?line check(fun() -> <<X:18/big-signed>> = <<34:18/big-signed>>, X end,
  694:                 "begin <<X:18/big-signed>> = <<34:18/big-signed>>, X end.",
  695:                 34),
  696:     ?line check(fun() -> <<X:18/little-signed>> = <<34:18/little-signed>>,
  697:                          X end,
  698:                 "begin <<X:18/little-signed>> = <<34:18/little-signed>>,
  699:                        X end.",
  700:                 34),
  701:     ?line check(fun() -> <<X:18/native-signed>> = <<34:18/native-signed>>,
  702:                          X end,
  703:                 "begin <<X:18/native-signed>> = <<34:18/native-signed>>,
  704:                        X end.",
  705:                 34),
  706:     ?line check(fun() -> <<X:18/big-unsigned>> = <<34:18/big-unsigned>>,
  707:                          X end,
  708:                 "begin <<X:18/big-unsigned>> = <<34:18/big-unsigned>>,
  709:                        X end.",
  710:                 34),
  711:     ?line check(fun() ->
  712:                         <<X:18/little-unsigned>> = <<34:18/little-unsigned>>,
  713:                         X end,
  714:                 "begin <<X:18/little-unsigned>> = <<34:18/little-unsigned>>,
  715:                        X end.",
  716:                 34),
  717:     ?line check(fun() ->
  718:                         <<X:18/native-unsigned>> = <<34:18/native-unsigned>>,
  719:                         X end,
  720:                 "begin <<X:18/native-unsigned>> = <<34:18/native-unsigned>>,
  721:                        X end.",
  722:                 34),
  723:     ?line check(fun() -> <<X:32/float-big>> = <<2.0:32/float-big>>, X end,
  724:                 "begin <<X:32/float-big>> = <<2.0:32/float-big>>,
  725:                         X end.",
  726:                 2.0),
  727:     ?line check(fun() -> <<X:32/float-little>> = <<2.0:32/float-little>>,
  728:                          X end,
  729:                 "begin <<X:32/float-little>> = <<2.0:32/float-little>>,
  730:                         X end.",
  731:                 2.0),
  732:     ?line check(fun() -> <<X:32/float-native>> = <<2.0:32/float-native>>,
  733:                          X end,
  734:                 "begin <<X:32/float-native>> = <<2.0:32/float-native>>,
  735:                         X end.",
  736:                 2.0),
  737: 
  738:     ?line check(
  739:             fun() ->
  740:                     [X || <<"hej",X:8>> <= <<"hej",8,"san",9,"hej",17,"hej">>]
  741:             end,
  742:             "[X || <<\"hej\",X:8>> <=
  743:                         <<\"hej\",8,\"san\",9,\"hej\",17,\"hej\">>].",
  744:             [8,17]),
  745:     ?line check(
  746:             fun() ->
  747:                     L = 8, << <<B:32>> || <<L:L,B:L>> <= <<16:8, 7:16>> >>
  748:             end,
  749:             "begin L = 8, << <<B:32>> || <<L:L,B:L>> <= <<16:8, 7:16>> >>
  750:              end.",
  751:             <<0,0,0,7>>),
  752:     %% Test the Value part of a binary segment.
  753:     %% "Old" bugs have been fixed (partial_eval is called on Value).
  754:     ?line check(fun() -> [ 3 || <<17/float>> <= <<17.0/float>>] end,
  755:                 "[ 3 || <<17/float>> <= <<17.0/float>>].",
  756:                 [3]),
  757:     ?line check(fun() -> [ 3 || <<17/float>> <- [<<17.0/float>>]] end,
  758:                 "[ 3 || <<17/float>> <- [<<17.0/float>>]].",
  759:                 [3]),
  760:     ?line check(fun() -> [ X || <<17/float,X:3>> <= <<17.0/float,2:3>>] end,
  761:                 "[ X || <<17/float,X:3>> <= <<17.0/float,2:3>>].",
  762:                 [2]),
  763:     ?line check(fun() ->
  764:                  [ foo || <<(1 bsl 1023)/float>> <= <<(1 bsl 1023)/float>>]
  765:                 end,
  766:                 "[ foo || <<(1 bsl 1023)/float>> <= <<(1 bsl 1023)/float>>].",
  767:                 [foo]),
  768:     ?line check(fun() ->
  769:                  [ foo || <<(1 bsl 1023)/float>> <- [<<(1 bsl 1023)/float>>]]
  770:                 end,
  771:                "[ foo || <<(1 bsl 1023)/float>> <- [<<(1 bsl 1023)/float>>]].",
  772:                 [foo]),
  773:     ?line error_check("[ foo || <<(1 bsl 1024)/float>> <-
  774:                             [<<(1 bsl 1024)/float>>]].",
  775:                       badarg),
  776:     ?line check(fun() ->
  777:                  [ foo || <<(1 bsl 1024)/float>> <- [<<(1 bsl 1023)/float>>]]
  778:                 end,
  779:                 "[ foo || <<(1 bsl 1024)/float>> <-
  780:                             [<<(1 bsl 1023)/float>>]].",
  781:                 []),
  782:     ?line check(fun() ->
  783:                  [ foo || <<(1 bsl 1024)/float>> <= <<(1 bsl 1023)/float>>]
  784:                 end,
  785:                 "[ foo || <<(1 bsl 1024)/float>> <=
  786:                             <<(1 bsl 1023)/float>>].",
  787:                 []),
  788:     ?line check(fun() ->
  789:                         L = 8,
  790:                         [{L,B} || <<L:L,B:L/float>> <= <<32:8,7:32/float>>]
  791:                 end,
  792:                 "begin L = 8,
  793:                        [{L,B} || <<L:L,B:L/float>> <= <<32:8,7:32/float>>]
  794:                  end.",
  795:                 [{32,7.0}]),
  796:     ?line check(fun() ->
  797:                         L = 8,
  798:                         [{L,B} || <<L:L,B:L/float>> <- [<<32:8,7:32/float>>]]
  799:                 end,
  800:                 "begin L = 8,
  801:                        [{L,B} || <<L:L,B:L/float>> <- [<<32:8,7:32/float>>]]
  802:                  end.",
  803:                 [{32,7.0}]),
  804:     ?line check(fun() ->
  805:                         [foo || <<"s">> <= <<"st">>]
  806:                 end,
  807:                 "[foo || <<\"s\">> <= <<\"st\">>].",
  808:                 [foo]),
  809:     ?line check(fun() -> <<_:32>> = <<17:32>> end,
  810:                 "<<_:32>> = <<17:32>>.",
  811:                 <<17:32>>),
  812:     ?line check(fun() -> [foo || <<_:32>> <= <<17:32,20:32>>] end,
  813:                 "[foo || <<_:32>> <= <<17:32,20:32>>].",
  814:                 [foo,foo]),
  815: 
  816:     ?line check(fun() -> << <<X:32>> || X <- [1,2,3], X > 1 >> end,
  817:                 "<< <<X:32>> || X <- [1,2,3], X > 1 >>.",
  818:                 <<0,0,0,2,0,0,0,3>>),
  819:     ?line error_check("[X || <<X>> <= [a,b]].",{bad_generator,[a,b]}),
  820:     ok.
  821: 
  822: otp_6787(doc) ->
  823:     ["OTP-6787. bitlevel binaries."];
  824: otp_6787(suite) ->
  825:     [];
  826: otp_6787(Config) when is_list(Config) ->
  827:     ?line check(
  828:             fun() -> <<16:(1024*1024)>> = <<16:(1024*1024)>> end,
  829:             "<<16:(1024*1024)>> = <<16:(1024*1024)>>.",
  830:             <<16:1048576>>),
  831:     ok.
  832: 
  833: otp_6977(doc) ->
  834:     ["OTP-6977. ++ bug."];
  835: otp_6977(suite) ->
  836:     [];
  837: otp_6977(Config) when is_list(Config) ->
  838:     ?line check(
  839:             fun() -> (fun([$X] ++ _) -> ok end)("X") end,
  840:             "(fun([$X] ++ _) -> ok end)(\"X\").",
  841:             ok),
  842:     ok.
  843: 
  844: otp_7550(doc) ->
  845:     ["OTP-7550. Support for UTF-8, UTF-16, UTF-32."];
  846: otp_7550(Config) when is_list(Config) ->
  847: 
  848:     %% UTF-8.
  849:     ?line check(
  850: 	    fun() -> <<65>> = <<65/utf8>> end,
  851: 	    "<<65>> = <<65/utf8>>.",
  852: 	    <<65>>),
  853:     ?line check(
  854: 	    fun() -> <<350/utf8>> = <<197,158>> end,
  855: 	    "<<350/utf8>> = <<197,158>>.",
  856: 	    <<197,158>>),
  857:     ?line check(
  858: 	    fun() -> <<$b,$j,$\303,$\266,$r,$n>> = <<"bj\366rn"/utf8>> end,
  859: 	    "<<$b,$j,$\303,$\266,$r,$n>> = <<\"bj\366rn\"/utf8>>.",
  860: 	    <<$b,$j,$\303,$\266,$r,$n>>),
  861: 
  862:     %% UTF-16.
  863:     ?line check(
  864: 	    fun() -> <<0,65>> = <<65/utf16>> end,
  865: 	    "<<0,65>> = <<65/utf16>>.",
  866: 	    <<0,65>>),
  867:     ?line check(
  868: 	    fun() -> <<16#D8,16#08,16#DF,16#45>> = <<16#12345/utf16>> end,
  869: 	    "<<16#D8,16#08,16#DF,16#45>> = <<16#12345/utf16>>.",
  870: 	    <<16#D8,16#08,16#DF,16#45>>),
  871:     ?line check(
  872: 	    fun() -> <<16#08,16#D8,16#45,16#DF>> = <<16#12345/little-utf16>> end,
  873: 	    "<<16#08,16#D8,16#45,16#DF>> = <<16#12345/little-utf16>>.",
  874: 	    <<16#08,16#D8,16#45,16#DF>>),
  875: 
  876:     ?line check(
  877: 	    fun() -> <<350/utf16>> = <<1,94>> end,
  878: 	    "<<350/utf16>> = <<1,94>>.",
  879: 	    <<1,94>>),
  880:     ?line check(
  881: 	    fun() -> <<350/little-utf16>> = <<94,1>> end,
  882: 	    "<<350/little-utf16>> = <<94,1>>.",
  883: 	    <<94,1>>),
  884:     ?line check(
  885: 	    fun() -> <<16#12345/utf16>> = <<16#D8,16#08,16#DF,16#45>> end,
  886: 	    "<<16#12345/utf16>> = <<16#D8,16#08,16#DF,16#45>>.",
  887: 	    <<16#D8,16#08,16#DF,16#45>>),
  888:     ?line check(
  889: 	    fun() -> <<16#12345/little-utf16>> = <<16#08,16#D8,16#45,16#DF>> end,
  890: 	    "<<16#12345/little-utf16>> = <<16#08,16#D8,16#45,16#DF>>.",
  891: 	    <<16#08,16#D8,16#45,16#DF>>),
  892: 
  893:     %% UTF-32.
  894:     ?line check(
  895: 	    fun() -> <<16#12345/utf32>> = <<16#0,16#01,16#23,16#45>> end,
  896: 	    "<<16#12345/utf32>> = <<16#0,16#01,16#23,16#45>>.",
  897: 	    <<16#0,16#01,16#23,16#45>>),
  898:     ?line check(
  899: 	    fun() -> <<16#0,16#01,16#23,16#45>> = <<16#12345/utf32>> end,
  900: 	    "<<16#0,16#01,16#23,16#45>> = <<16#12345/utf32>>.",
  901: 	    <<16#0,16#01,16#23,16#45>>),
  902:     ?line check(
  903: 	    fun() -> <<16#12345/little-utf32>> = <<16#45,16#23,16#01,16#00>> end,
  904: 	    "<<16#12345/little-utf32>> = <<16#45,16#23,16#01,16#00>>.",
  905: 	    <<16#45,16#23,16#01,16#00>>),
  906:     ?line check(
  907: 	    fun() -> <<16#12345/little-utf32>> end,
  908: 	    "<<16#12345/little-utf32>>.",
  909: 	    <<16#45,16#23,16#01,16#00>>),
  910: 
  911:     %% Mixed.
  912:     ?line check(
  913: 	    fun() -> <<16#41,16#12345/utf32,16#0391:16,16#2E:8>> end,
  914: 	    "<<16#41,16#12345/utf32,16#0391:16,16#2E:8>>.",
  915: 	    <<16#41,16#00,16#01,16#23,16#45,16#03,16#91,16#2E>>),
  916:     ok.
  917: 
  918: 
  919: otp_8133(doc) ->
  920:     ["OTP-8133. Bit comprehension bug."];
  921: otp_8133(suite) ->
  922:     [];
  923: otp_8133(Config) when is_list(Config) ->
  924:     ?line check(
  925:             fun() ->
  926:                   E = fun(N) ->
  927:                               if
  928:                                   is_integer(N) -> <<N/integer>>;
  929:                                   true -> throw(foo)
  930:                               end
  931:                       end,
  932:                   try << << (E(V))/binary >> || V <- [1,2,3,a] >>
  933:                   catch foo -> ok
  934:                   end
  935:             end,
  936:             "begin
  937:                  E = fun(N) ->
  938:                             if is_integer(N) -> <<N/integer>>;
  939:                                true -> throw(foo)
  940:                             end
  941:                      end,
  942:                  try << << (E(V))/binary >> || V <- [1,2,3,a] >>
  943:                  catch foo -> ok
  944:                  end
  945:              end.",
  946:             ok),
  947:     ?line check(
  948:             fun() ->
  949:                   E = fun(N) ->
  950:                               if
  951:                                   is_integer(N) -> <<N/integer>>;
  952:                                   true -> erlang:error(foo)
  953:                               end
  954:                       end,
  955:                   try << << (E(V))/binary >> || V <- [1,2,3,a] >>
  956:                   catch error:foo -> ok
  957:                   end
  958:             end,
  959:             "begin
  960:                  E = fun(N) ->
  961:                             if is_integer(N) -> <<N/integer>>;
  962:                                true -> erlang:error(foo)
  963:                             end
  964:                      end,
  965:                  try << << (E(V))/binary >> || V <- [1,2,3,a] >>
  966:                  catch error:foo -> ok
  967:                  end
  968:              end.",
  969:             ok),
  970:     ok.
  971: 
  972: funs(doc) ->
  973:     ["Simple cases, just to cover some code."];
  974: funs(suite) ->
  975:     [];
  976: funs(Config) when is_list(Config) ->
  977:     do_funs(none, none),
  978:     do_funs(lfh(), none),
  979:     do_funs(lfh(), efh()),
  980: 
  981:     ?line error_check("nix:foo().", {access_not_allowed,nix}, lfh(), efh()),
  982:     ?line error_check("bar().", undef, none, none),
  983: 
  984:     ?line check(fun() -> F1 = fun(F,N) -> ?MODULE:count_down(F, N) end,
  985:                          F1(F1, 1000) end,
  986:                 "begin F1 = fun(F,N) -> count_down(F, N) end,"
  987:                 "F1(F1,1000) end.",
  988: 		0, ['F1'], lfh(), none),
  989: 
  990:     ?line check(fun() -> F1 = fun(F,N) -> ?MODULE:count_down(F, N) end,
  991:                          F1(F1, 1000) end,
  992:                 "begin F1 = fun(F,N) -> count_down(F, N) end,"
  993:                 "F1(F1,1000) end.",
  994: 		0, ['F1'], lfh_value(), none),
  995: 
  996:     ?line check(fun() -> F1 = fun(F,N) -> ?MODULE:count_down(F, N) end,
  997:                          F1(F1, 1000) end,
  998:                 "begin F1 = fun(F,N) -> count_down(F, N) end,"
  999:                 "F1(F1,1000) end.",
 1000: 		0, ['F1'], lfh_value_extra(), none),
 1001: 
 1002:     ?line check(fun() -> F1 = fun(F,N) -> ?MODULE:count_down(F, N) end,
 1003:                          F1(F1, 1000) end,
 1004:                 "begin F1 = fun(F,N) -> count_down(F, N) end,"
 1005:                 "F1(F1,1000) end.",
 1006: 		0, ['F1'], {?MODULE,local_func_value}, none),
 1007:     %% This is not documented, and only for backward compatibility (good!).
 1008:     B0 = erl_eval:new_bindings(),
 1009:     ?line check(fun() -> is_function(?MODULE:count_down_fun()) end,
 1010:                 "begin is_function(count_down_fun()) end.",
 1011:                 true, [], {?MODULE,local_func,[B0]},none),
 1012: 
 1013:     EF = fun({timer,sleep}, As) when length(As) == 1 -> exit({got_it,sleep});
 1014:             ({M,F}, As) -> apply(M, F, As)
 1015:          end,
 1016:     EFH = {value, EF},
 1017:     ?line error_check("apply(timer, sleep, [1]).", got_it, none, EFH),
 1018:     ?line error_check("begin F = fun(T) -> timer:sleep(T) end,F(1) end.",
 1019:                       got_it, none, EFH),
 1020:     ?line error_check("fun c/1.", undef),
 1021:     ?line error_check("fun a:b/0().", undef),
 1022: 
 1023:     MaxArgs = 20,
 1024:     ?line [true] =
 1025:         lists:usort([run_many_args(SAs) || SAs <- many_args(MaxArgs)]),
 1026:     ?line {'EXIT',{{argument_limit,_},_}} =
 1027:         (catch run_many_args(many_args1(MaxArgs+1))),
 1028:     ok.
 1029: 
 1030: run_many_args({S, As}) ->
 1031:     apply(eval_string(S), As) =:= As.
 1032: 
 1033: many_args(N) ->
 1034:     [many_args1(I) || I <- lists:seq(1, N)].
 1035: 
 1036: many_args1(N) ->
 1037:     F = fun(L, P) ->
 1038:                 tl(lists:flatten([","++P++integer_to_list(E) || E <- L]))
 1039:         end,
 1040:     L = lists:seq(1, N),
 1041:     T = F(L, "V"),
 1042:     S = lists:flatten(io_lib:format("fun(~s) -> [~s] end.", [T, T])),
 1043:     {S, L}.
 1044: 
 1045: do_funs(LFH, EFH) ->
 1046:     %% LFH is not really used by these examples...
 1047: 
 1048:     %% These tests do not prove that tail recursive functions really
 1049:     %% work (that the process does not grow); one should also run them
 1050:     %% manually with 1000 replaced by 1000000.
 1051: 
 1052:     M = atom_to_list(?MODULE),
 1053:     ?line check(fun() -> F1 = fun(F,N) -> ?MODULE:count_down(F, N) end,
 1054:                          F1(F1, 1000) end,
 1055:                 concat(["begin F1 = fun(F,N) -> ", M,
 1056:                         ":count_down(F, N) end, F1(F1,1000) end."]),
 1057: 		0, ['F1'], LFH, EFH),
 1058:     ?line check(fun() -> F1 = fun(F,N) -> apply(?MODULE,count_down,[F,N])
 1059:                               end, F1(F1, 1000) end,
 1060:                 concat(["begin F1 = fun(F,N) -> apply(", M,
 1061:                         ",count_down,[F, N]) end, F1(F1,1000) end."]),
 1062: 		0, ['F1'], LFH, EFH),
 1063:     ?line check(fun() -> F = fun(F,N) when N > 0 -> apply(F,[F,N-1]);
 1064:                                 (_F,0) -> ok end,
 1065:                          F(F, 1000)
 1066:                 end,
 1067:                 "begin F = fun(F,N) when N > 0 -> apply(F,[F,N-1]);"
 1068:                              "(_F,0) -> ok end,"
 1069:                        "F(F, 1000) end.",
 1070:                 ok, ['F'], LFH, EFH),
 1071:     ?line check(fun() -> F = fun(F,N) when N > 0 ->
 1072:                                      apply(erlang,apply,[F,[F,N-1]]);
 1073:                                 (_F,0) -> ok end,
 1074:                          F(F, 1000)
 1075:                 end,
 1076:                 "begin F = fun(F,N) when N > 0 ->"
 1077:                                    "apply(erlang,apply,[F,[F,N-1]]);"
 1078:                              "(_F,0) -> ok end,"
 1079:                        "F(F, 1000) end.",
 1080:                 ok, ['F'], LFH, EFH),
 1081:     ?line check(fun() -> F = count_down_fun(),
 1082:                          SF = fun(SF, F1, N) -> F(SF, F1, N) end,
 1083:                          SF(SF, F, 1000) end,
 1084:                 concat(["begin F = ", M, ":count_down_fun(),"
 1085:                         "SF = fun(SF, F1, N) -> F(SF, F1, N) end,"
 1086:                         "SF(SF, F, 1000) end."]),
 1087:                 ok, ['F','SF'], LFH, EFH),
 1088: 
 1089: 
 1090:     ?line check(fun() -> F = fun(X) -> A = 1+X, {X,A} end,
 1091:                          true = {2,3} == F(2) end,
 1092:                 "begin F = fun(X) -> A = 1+X, {X,A} end,
 1093:                        true = {2,3} == F(2) end.", true, ['F'], LFH, EFH),
 1094:     ?line check(fun() -> F = fun(X) -> byte_size(X) end,
 1095:                          ?MODULE:do_apply(F,<<"hej">>) end,
 1096:                 concat(["begin F = fun(X) -> size(X) end,",
 1097:                         M,":do_apply(F,<<\"hej\">>) end."]),
 1098:                 3, ['F'], LFH, EFH),
 1099: 
 1100:     ?line check(fun() -> F1 = fun(X, Z) -> {X,Z} end,
 1101:                          Z = 5,
 1102:                          F2 = fun(X, Y) -> F1(Z,{X,Y}) end,
 1103:                          F3 = fun(X, Y) -> {a,F1(Z,{X,Y})} end,
 1104:                          {5,{x,y}} = F2(x,y),
 1105:                          {a,{5,{y,x}}} = F3(y,x),
 1106:                          {5,{5,y}} = F2(Z,y),
 1107:                          true = {5,{x,5}} == F2(x,Z) end,
 1108:                 "begin F1 = fun(X, Z) -> {X,Z} end,
 1109:                        Z = 5,
 1110:                        F2 = fun(X, Y) -> F1(Z,{X,Y}) end,
 1111:                        F3 = fun(X, Y) -> {a,F1(Z,{X,Y})} end,
 1112:                        {5,{x,y}} = F2(x,y),
 1113:                        {a,{5,{y,x}}} = F3(y,x),
 1114:                        {5,{5,y}} = F2(Z,y),
 1115:                        true = {5,{x,5}} == F2(x,Z) end.",
 1116:                 true, ['F1','Z','F2','F3'], LFH, EFH),
 1117:     ?line check(fun() -> F = fun(X) -> byte_size(X) end,
 1118:                          F2 = fun(Y) -> F(Y) end,
 1119:                          ?MODULE:do_apply(F2,<<"hej">>) end,
 1120:                 concat(["begin F = fun(X) -> size(X) end,",
 1121:                         "F2 = fun(Y) -> F(Y) end,",
 1122:                         M,":do_apply(F2,<<\"hej\">>) end."]),
 1123:                 3, ['F','F2'], LFH, EFH),
 1124:     ?line check(fun() -> Z = 5, F = fun(X) -> {Z,X} end,
 1125:                          F2 = fun(Z) -> F(Z) end, F2(3) end,
 1126:                 "begin Z = 5, F = fun(X) -> {Z,X} end,
 1127:                        F2 = fun(Z) -> F(Z) end, F2(3) end.",
 1128:                 {5,3},['F','F2','Z'], LFH, EFH),
 1129:     ?line check(fun() -> F = fun(Z) -> Z end,
 1130:                          F2 = fun(X) -> F(X), Z = {X,X}, Z end,
 1131:                          {1,1} = F2(1), Z = 7, Z end,
 1132:                 "begin F = fun(Z) -> Z end,
 1133:                        F2 = fun(X) -> F(X), Z = {X,X}, Z end,
 1134:                        {1,1} = F2(1), Z = 7, Z end.", 7, ['F','F2','Z'],
 1135:                 LFH, EFH),
 1136:     ?line check(fun() -> F = fun(F, N) -> [?MODULE:count_down(F,N) || X <-[1]]
 1137:                              end, F(F,2) end,
 1138:                 concat(["begin F = fun(F, N) -> [", M,
 1139:                        ":count_down(F,N) || X <-[1]] end, F(F,2) end."]),
 1140:                 [[[0]]], ['F'], LFH, EFH),
 1141:     ok.
 1142: 
 1143: count_down(F, N) when N > 0 ->
 1144:     F(F, N-1);
 1145: count_down(_F, N) ->
 1146:     N.
 1147: 
 1148: count_down_fun() ->
 1149:     fun(SF,F,N) when N > 0 -> SF(SF,F,N-1);
 1150:        (_SF,_F,_N) -> ok
 1151:     end.
 1152: 
 1153: do_apply(F, V) ->
 1154:     F(V).
 1155: 
 1156: lfh() ->
 1157:     {eval, fun(F, As, Bs) -> local_func(F, As, Bs) end}.
 1158: 
 1159: local_func(F, As0, Bs0) when is_atom(F) ->
 1160:     {As,Bs} = erl_eval:expr_list(As0, Bs0, {eval,lfh()}),
 1161:     case erlang:function_exported(?MODULE, F, length(As)) of
 1162: 	true ->
 1163: 	    {value,apply(?MODULE, F, As),Bs};
 1164: 	false ->
 1165: 	    {value,apply(shell_default, F, As),Bs}
 1166:     end.
 1167: 
 1168: lfh_value_extra() ->
 1169:     %% Not documented.
 1170:     {value, fun(F, As) -> local_func_value(F, As) end, []}.
 1171: 
 1172: lfh_value() ->
 1173:     {value, fun(F, As) -> local_func_value(F, As) end}.
 1174: 
 1175: local_func_value(F, As) when is_atom(F) ->
 1176:     case erlang:function_exported(?MODULE, F, length(As)) of
 1177: 	true ->
 1178: 	    apply(?MODULE, F, As);
 1179: 	false ->
 1180: 	    apply(shell_default, F, As)
 1181:     end.
 1182: 
 1183: efh() ->
 1184:     {value, fun(F, As) -> external_func(F, As) end}.
 1185: 
 1186: external_func({M,_}, _As) when M == nix ->
 1187:     exit({{access_not_allowed,M},[mfa]});
 1188: external_func(F, As) when is_function(F) ->
 1189:     apply(F, As);
 1190: external_func({M,F}, As) ->
 1191:     apply(M, F, As).
 1192: 
 1193: 
 1194: 
 1195: try_catch(doc) ->
 1196:     ["Test try-of-catch-after-end statement"];
 1197: try_catch(suite) ->
 1198:     [];
 1199: try_catch(Config) when is_list(Config) ->
 1200:     %% Match in of with catch
 1201:     ?line check(fun() -> try 1 of 1 -> 2 catch _:_ -> 3 end end,
 1202: 		"try 1 of 1 -> 2 catch _:_ -> 3 end.", 2),
 1203:     ?line check(fun() -> try 1 of 1 -> 2; 3 -> 4 catch _:_ -> 5 end end,
 1204: 		"try 1 of 1 -> 2; 3 -> 4 catch _:_ -> 5 end.", 2),
 1205:     ?line check(fun() -> try 3 of 1 -> 2; 3 -> 4 catch _:_ -> 5 end end,
 1206: 		"try 3 of 1 -> 2; 3 -> 4 catch _:_ -> 5 end.", 4),
 1207:     %% Just after
 1208:     ?line check(fun () -> X = try 1 after put(try_catch, 2) end,
 1209: 			  {X,get(try_catch)} end,
 1210: 		"begin X = try 1 after put(try_catch, 2) end, "
 1211: 		"{X,get(try_catch)} end.", {1,2}),
 1212:     %% Match in of with after
 1213:     ?line check(fun() -> X = try 1 of 1 -> 2 after put(try_catch, 3) end,
 1214: 			 {X,get(try_catch)} end,
 1215: 		"begin X = try 1 of 1 -> 2 after put(try_catch, 3) end, "
 1216: 		"{X,get(try_catch)} end.", {2,3}),
 1217:     ?line check(fun() -> X = try 1 of 1 -> 2; 3 -> 4
 1218: 			     after put(try_catch, 5) end,
 1219: 			 {X,get(try_catch)} end,
 1220: 		"begin X = try 1 of 1 -> 2; 3 -> 4 "
 1221: 		"          after put(try_catch, 5) end, "
 1222: 		"      {X,get(try_catch)} end.", {2,5}),
 1223:     ?line check(fun() -> X = try 3 of 1 -> 2; 3 -> 4
 1224: 			     after put(try_catch, 5) end,
 1225: 			 {X,get(try_catch)} end,
 1226: 		"begin X = try 3 of 1 -> 2; 3 -> 4 "
 1227: 		"          after put(try_catch, 5) end, "
 1228: 		"      {X,get(try_catch)} end.", {4,5}),
 1229:     %% Nomatch in of
 1230:     ?line error_check("try 1 of 2 -> 3 catch _:_ -> 4 end.",
 1231: 		      {try_clause,1}),
 1232:     %% Nomatch in of with after
 1233:     ?line check(fun () -> {'EXIT',{{try_clause,1},_}} =
 1234: 			      begin catch try 1 of 2 -> 3
 1235: 				          after put(try_catch, 4) end end,
 1236: 			  get(try_catch) end,
 1237: 		"begin {'EXIT',{{try_clause,1},_}} = "
 1238: 		"          begin catch try 1 of 2 -> 3 "
 1239: 		"                      after put(try_catch, 4) end end, "
 1240: 		"      get(try_catch) end. ", 4),
 1241:     %% Exception in try
 1242:     ?line check(fun () -> try 1=2 catch error:{badmatch,2} -> 3 end end,
 1243: 		"try 1=2 catch error:{badmatch,2} -> 3 end.", 3),
 1244:     ?line check(fun () -> try 1=2 of 3 -> 4
 1245: 			  catch error:{badmatch,2} -> 5 end end,
 1246: 		"try 1=2 of 3 -> 4 "
 1247: 		"catch error:{badmatch,2} -> 5 end.", 5),
 1248:     %% Exception in try with after
 1249:     ?line check(fun () -> X = try 1=2
 1250: 			      catch error:{badmatch,2} -> 3
 1251: 			      after put(try_catch, 4) end,
 1252: 			  {X,get(try_catch)} end,
 1253: 		"begin X = try 1=2 "
 1254: 		"          catch error:{badmatch,2} -> 3 "
 1255: 		"          after put(try_catch, 4) end, "
 1256: 		"      {X,get(try_catch)} end. ", {3,4}),
 1257:     ?line check(fun () -> X = try 1=2 of 3 -> 4
 1258: 			      catch error:{badmatch,2} -> 5
 1259: 			      after put(try_catch, 6) end,
 1260: 			  {X,get(try_catch)} end,
 1261: 		"begin X = try 1=2 of 3 -> 4"
 1262: 		"          catch error:{badmatch,2} -> 5 "
 1263: 		"          after put(try_catch, 6) end, "
 1264: 		"      {X,get(try_catch)} end. ", {5,6}),
 1265:     %% Uncaught exception
 1266:     ?line error_check("try 1=2 catch error:undefined -> 3 end. ",
 1267: 		      {badmatch,2}),
 1268:     ?line error_check("try 1=2 of 3 -> 4 catch error:undefined -> 5 end. ",
 1269: 		      {badmatch,2}),
 1270:     %% Uncaught exception with after
 1271:     ?line check(fun () -> {'EXIT',{{badmatch,2},_}} =
 1272: 			      begin catch try 1=2
 1273: 					  after put(try_catch, 3) end end,
 1274: 			  get(try_catch) end,
 1275: 		"begin {'EXIT',{{badmatch,2},_}} = "
 1276: 		"          begin catch try 1=2 "
 1277: 		"                      after put(try_catch, 3) end end, "
 1278: 		"      get(try_catch) end. ", 3),
 1279:     ?line check(fun () -> {'EXIT',{{badmatch,2},_}} =
 1280: 			      begin catch try 1=2 of 3 -> 4
 1281: 					  after put(try_catch, 5) end end,
 1282: 			  get(try_catch) end,
 1283: 		"begin {'EXIT',{{badmatch,2},_}} = "
 1284: 		"          begin catch try 1=2 of 3 -> 4"
 1285: 		"                      after put(try_catch, 5) end end, "
 1286: 		"      get(try_catch) end. ", 5),
 1287:     ?line check(fun () -> {'EXIT',{{badmatch,2},_}} =
 1288: 			      begin catch try 1=2 catch error:undefined -> 3
 1289: 					  after put(try_catch, 4) end end,
 1290: 			  get(try_catch) end,
 1291: 		"begin {'EXIT',{{badmatch,2},_}} = "
 1292: 		"          begin catch try 1=2 catch error:undefined -> 3 "
 1293: 		"                      after put(try_catch, 4) end end, "
 1294: 		"      get(try_catch) end. ", 4),
 1295:     ?line check(fun () -> {'EXIT',{{badmatch,2},_}} =
 1296: 			      begin catch try 1=2 of 3 -> 4
 1297: 					  catch error:undefined -> 5
 1298: 					  after put(try_catch, 6) end end,
 1299: 			  get(try_catch) end,
 1300: 		"begin {'EXIT',{{badmatch,2},_}} = "
 1301: 		"          begin catch try 1=2 of 3 -> 4 "
 1302: 		"                      catch error:undefined -> 5 "
 1303: 		"                      after put(try_catch, 6) end end, "
 1304: 		"      get(try_catch) end. ", 6),
 1305:     ok.
 1306: 
 1307: 
 1308: eval_expr_5(doc) ->
 1309:     ["(OTP-7933)"];
 1310: eval_expr_5(suite) ->
 1311:     [];
 1312: eval_expr_5(Config) when is_list(Config) ->
 1313:     ?line {ok,Tokens ,_} =
 1314: 	erl_scan:string("if a+4 == 4 -> yes; true -> no end. "),
 1315:     ?line {ok, [Expr]} = erl_parse:parse_exprs(Tokens),
 1316:     ?line {value, no, []} = erl_eval:expr(Expr, [], none, none, none),
 1317:     ?line no = erl_eval:expr(Expr, [], none, none, value),
 1318:     try
 1319: 	erl_eval:expr(Expr, [], none, none, 4711),
 1320: 	?line function_clause = should_never_reach_here
 1321:     catch
 1322: 	error:function_clause ->
 1323: 	    ok
 1324:     end.
 1325: 
 1326: %% Check the string in different contexts: as is; in fun; from compiled code.
 1327: check(F, String, Result) ->
 1328:     check1(F, String, Result),
 1329:     FunString = concat(["fun() -> ", no_final_dot(String), " end(). "]),
 1330:     check1(F, FunString, Result),
 1331:     CompileString = concat(["hd(lists:map(fun(_) -> ", no_final_dot(String),
 1332:                             " end, [foo])). "]),
 1333:     check1(F, CompileString, Result).
 1334: 
 1335: check1(F, String, Result) ->
 1336:     Result = F(),
 1337:     case catch parse_and_run(String) of
 1338:         {value, Result, _} ->
 1339:             ok;
 1340:         Other ->
 1341:             test_server:fail({eval, Other, Result})
 1342:     end.
 1343: 
 1344: check(F, String, Result, BoundVars, LFH, EFH) ->
 1345:     Result = F(),
 1346:     case catch parse_and_run(String, LFH, EFH) of
 1347:         {value, Result, Bs} ->
 1348:             %% We just assume that Bs is an orddict...
 1349:             Keys = orddict:fetch_keys(Bs),
 1350:             case sort(BoundVars) == Keys of
 1351:                 true ->
 1352:                     ok;
 1353:                 false ->
 1354:                     test_server:fail({check, BoundVars, Keys})
 1355:             end,
 1356:             ok;
 1357:         Other ->
 1358:             test_server:fail({check, Other, Result})
 1359:     end.
 1360: 
 1361: error_check(String, Result) ->
 1362:     case catch parse_and_run(String) of
 1363:         {'EXIT', {Result,_}} ->
 1364:             ok;
 1365:         Other ->
 1366:             test_server:fail({eval, Other, Result})
 1367:     end.
 1368: 
 1369: error_check(String, Result, LFH, EFH) ->
 1370:     case catch parse_and_run(String, LFH, EFH) of
 1371:         {'EXIT', {Result,_}} ->
 1372:             ok;
 1373:         Other ->
 1374:             test_server:fail({eval, Other, Result})
 1375:     end.
 1376: 
 1377: eval_string(String) ->
 1378:     {value, Result, _} = parse_and_run(String),
 1379:     Result.
 1380: 
 1381: parse_and_run(String) ->
 1382:     {ok,Tokens,_} = erl_scan:string(String),
 1383:     {ok, [Expr]} = erl_parse:parse_exprs(Tokens),
 1384:     erl_eval:expr(Expr, []).
 1385: 
 1386: parse_and_run(String, LFH, EFH) ->
 1387:     {ok,Tokens,_} = erl_scan:string(String),
 1388:     {ok, [Expr]} = erl_parse:parse_exprs(Tokens),
 1389:     erl_eval:expr(Expr, [], LFH, EFH).
 1390: 
 1391: no_final_dot(S) ->
 1392:     case lists:reverse(S) of
 1393:         " ." ++ R -> lists:reverse(R);
 1394:         "." ++ R -> lists:reverse(R);
 1395:         _ -> S
 1396:     end.