%% -*- coding: utf-8 -*-
%%
%% %CopyrightBegin%
%%
%% Copyright Ericsson AB 1999-2013. All Rights Reserved.
%%
%% The contents of this file are subject to the Erlang Public License,
%% Version 1.1, (the "License"); you may not use this file except in
%% compliance with the License. You should have received a copy of the
%% Erlang Public License along with this software. If not, it can be
%% retrieved online at http://www.erlang.org/.
%%
%% Software distributed under the License is distributed on an "AS IS"
%% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
%% the License for the specific language governing rights and limitations
%% under the License.
%%
%% %CopyrightEnd%
%%
-module(io_SUITE).
-export([all/0, suite/0,groups/0,init_per_suite/1, end_per_suite/1,
init_per_group/2,end_per_group/2]).
-export([init_per_testcase/2, end_per_testcase/2]).
-export([error_1/1, float_g/1, otp_5403/1, otp_5813/1, otp_6230/1,
otp_6282/1, otp_6354/1, otp_6495/1, otp_6517/1, otp_6502/1,
manpage/1, otp_6708/1, otp_7084/1, otp_7421/1,
io_lib_collect_line_3_wb/1, cr_whitespace_in_string/1,
io_fread_newlines/1, otp_8989/1, io_lib_fread_literal/1,
io_lib_print_binary_depth_one/1, otp_10302/1, otp_10836/1]).
%-define(debug, true).
-ifdef(debug).
-define(format(S, A), io:format(S, A)).
-define(line, put(line, ?LINE), ).
-define(config(X,Y), foo).
-define(t, test_server).
-define(privdir(_), "./io_SUITE_priv").
-else.
-include_lib("test_server/include/test_server.hrl").
-define(format(S, A), ok).
-define(privdir(Conf), ?config(priv_dir, Conf)).
-endif.
% Default timetrap timeout (set in init_per_testcase).
-define(default_timeout, ?t:minutes(1)).
init_per_testcase(_Case, Config) ->
?line Dog = ?t:timetrap(?default_timeout),
[{watchdog, Dog} | Config].
end_per_testcase(_Case, _Config) ->
Dog = ?config(watchdog, _Config),
test_server:timetrap_cancel(Dog),
ok.
suite() -> [{ct_hooks,[ts_install_cth]}].
all() ->
[error_1, float_g, otp_5403, otp_5813, otp_6230,
otp_6282, otp_6354, otp_6495, otp_6517, otp_6502,
manpage, otp_6708, otp_7084, otp_7421,
io_lib_collect_line_3_wb, cr_whitespace_in_string,
io_fread_newlines, otp_8989, io_lib_fread_literal,
io_lib_print_binary_depth_one, otp_10302, otp_10836].
groups() ->
[].
init_per_suite(Config) ->
Config.
end_per_suite(_Config) ->
ok.
init_per_group(_GroupName, Config) ->
Config.
end_per_group(_GroupName, Config) ->
Config.
error_1(doc) ->
["Error cases for output"];
error_1(suite) ->
[];
error_1(Config) when is_list(Config) ->
%% We don't do erroneous output on stdout - the test server
%% seems to catch that somehow.
?line PrivDir = ?privdir(Config),
?line File = filename:join(PrivDir, "slask"),
?line {ok, F1} = file:open(File, [write]),
?line {'EXIT', _} = (catch io:format(muttru, "hej", [])),
?line {'EXIT', _} = (catch io:format(F1, pelle, "hej")),
?line {'EXIT', _} = (catch io:format(F1, 1, "hej")),
?line {'EXIT', _} = (catch io:format(F1, "~p~", [kaka])),
?line {'EXIT', _} = (catch io:format(F1, "~m~n", [kaka])),
%% This causes the file process to die, and it is linked to us,
%% so we can't catch the error this easily.
% ?line {'EXIT', _} = (catch io:put_chars(F1, 666)),
?line file:close(F1),
?line {'EXIT', _} = (catch io:format(F1, "~p", ["hej"])),
ok.
float_g(Config) when is_list(Config) ->
?line ["5.00000e-2",
"0.500000",
"5.00000",
"50.0000",
"500.000",
"5000.00",
"5.00000e+4",
"5.00000e+5"] = float_g_1("~g", 5.0, -2, 5),
?line ["-5.0000e-2",
"-0.50000",
"-5.0000",
"-50.000",
"-500.00",
"-5000.0",
"-5.0000e+4",
"-5.0000e+5"] = float_g_1("~.5g", -5.0, -2, 5),
?line ["5.000e-2",
"0.5000",
"5.000",
"50.00",
"500.0",
"5.000e+3",
"5.000e+4",
"5.000e+5"] = float_g_1("~.4g", 5.0, -2, 5),
?line ["-5.00e-2",
"-0.500",
"-5.00",
"-50.0",
"-5.00e+2",
"-5.00e+3",
"-5.00e+4",
"-5.00e+5"] = float_g_1("~.3g", -5.0, -2, 5),
?line ["5.0e-2",
"0.50",
"5.0",
"5.0e+1",
"5.0e+2",
"5.0e+3",
"5.0e+4",
"5.0e+5"] = float_g_1("~.2g", 5.0, -2, 5),
?line
case catch fmt("~.1g", [0.5]) of
"0.5" ->
?line
["5.0e-2",
"0.5",
"5.0e+0",
"5.0e+1",
"5.0e+2",
"5.0e+3",
"5.0e+4",
"5.0e+5"] = float_g_1("~.1g", 5.0, -2, 5);
{'EXIT',_} -> ok
end,
?line ["4.99999e-2",
"0.499999",
"4.99999",
"49.9999",
"499.999",
"4999.99",
"4.99999e+4",
"4.99999e+5"] = float_g_1("~g", 4.9999949999, -2, 5),
?line ["-5.00000e-2",
"-0.500000",
"-5.00000",
"-50.0000",
"-500.000",
"-5000.00",
"-5.00000e+4",
"-5.00000e+5"] = float_g_1("~g", -4.9999950001, -2, 5),
ok.
float_g_1(Fmt, V, Min, Max) ->
[fmt(Fmt, [V*math:pow(10, E)]) || E <- lists:seq(Min, Max)].
otp_5403(doc) ->
["OTP-5403. ~s formats I/O lists and a single binary."];
otp_5403(suite) ->
[];
otp_5403(Config) when is_list(Config) ->
?line "atom" = fmt("~s", [atom]),
?line "binary" = fmt("~s", [<<"binary">>]),
?line "atail" = fmt("~s", [["a" | <<"tail">>]]),
?line "deepcharlist" = fmt("~s", [["deep",["char",["list"]]]]),
?line "somebinaries" = fmt("~s", [[<<"some">>,[<<"binaries">>]]]),
ok.
otp_5813(doc) ->
["OTP-5813. read/3 is new."];
otp_5813(suite) ->
[];
otp_5813(Config) when is_list(Config) ->
?line PrivDir = ?privdir(Config),
?line File = filename:join(PrivDir, "test"),
?line ok = file:write_file(File, <<"a. ">>),
?line {ok, Fd} = file:open(File, [read]),
?line {ok, a, 1} = io:read(Fd, '', 1),
?line {eof,1} = io:read(Fd, '', 1),
ok = file:close(Fd),
?line ok = file:write_file(File, <<"[}.">>),
?line {ok, Fd2} = file:open(File, [read]),
?line {error,{1,_,_},1} = io:read(Fd2, '', 1),
?line ok = file:close(Fd),
file:delete(File),
ok.
otp_6230(doc) ->
["OTP-6230. ~p and ~P with (huge) binaries."];
otp_6230(suite) ->
[];
otp_6230(Config) when is_list(Config) ->
%% The problem is actually huge binaries, but the small tests here
%% just run through most of the modified code.
?line "<<>>" = fmt("~P", [<<"">>,-1]),
?line "<<\"hej\">>" = fmt("~P", [<<"hej">>,-1]),
?line "{hej,...}" = fmt("~P", [{hej,<<"hej">>},2]),
?line "{hej,<<...>>}" = fmt("~P", [{hej,<<"hej">>},3]),
?line "{hej,<<\"hejs\"...>>}" = fmt("~P", [{hej,<<"hejsan">>},4]),
?line "{hej,<<\"hej\">>}" = fmt("~P", [{hej,<<"hej">>},6]),
?line "<<...>>" = fmt("~P", [<<"hej">>,1]),
?line "<<\"hejs\"...>>" = fmt("~P", [<<"hejsan">>,2]),
?line "<<\"hej\">>" = fmt("~P", [<<"hej">>,4]),
?line "{hej,<<127,...>>}" =
fmt("~P", [{hej,<<127:8,<<"hej">>/binary>>},4]),
?line "{hej,<<127,104,101,...>>}" =
fmt("~P", [{hej,<<127:8,<<"hej">>/binary>>},6]),
B = list_to_binary(lists:duplicate(30000, $a)),
?line "<<\"aaaa"++_ = fmt("~P", [B, 20000]),
ok.
otp_6282(doc) ->
["OTP-6282. ~p truncates strings (like binaries) depending on depth."];
otp_6282(suite) ->
[];
otp_6282(Config) when is_list(Config) ->
?line "[]" = p("", 1, 20, 1),
?line "[]" = p("", 1, 20, -1),
?line "[...]" = p("a", 1, 20, 1),
?line "\"a\"" = p("a", 1, 20, 2),
?line "\"aa\"" = p("aa", 1, 20, 2),
?line "\"aaa\"" = p("aaa", 1, 20, 2),
?line "\"aaaa\"" = p("aaaa", 1, 20, 2),
% ?line "\"aaaa\"..." = p("aaaaaa", 1, 20, 2),
?line "\"a\"" = p("a", 1, 20, -1),
% ?line "\"aa\"..." = p([$a,$a,1000], 1, 20, 2),
% ?line "\"aa\"..." = p([$a,$a,1000], 1, 20, 3),
?line "[97,97,1000]" = p([$a,$a,1000], 1, 20, 4),
S1 = lists:duplicate(200,$a),
?line "[...]" = p(S1, 1, 20, 1),
% ?line "\"aaaaaaaaaaaaaaaa\"\n \"aaaaaaaaaaaaaaaa\"\n \"aaaa\"..." =
% ?line "\"aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa\"..." =
% p(S1, 1, 20, 10),
?line true = "\"" ++ S1 ++ "\"" =:= p(S1, 1, 205, -1),
?line "[97,97,1000|...]" = p([$a,$a,1000,1000], 1, 20, 4),
?line "[[]]" = p([""], 1, 20, 2),
?line "[[]]" = p([""], 1, 20, -1),
?line "[[...]]" = p(["a"], 1, 20, 2),
?line "[\"a\"]" = p(["a"], 1, 20, 3),
?line "[\"aa\"]" = p(["aa"], 1, 20, 3),
?line "[\"aaa\"]" = p(["aaa"], 1, 20, 3),
?line "[\"a\"]" = p(["a"], 1, 20, -1),
% ?line "[\"aa\"...]" = p([[$a,$a,1000]], 1, 20, 3),
% ?line "[\"aa\"...]" = p([[$a,$a,1000]], 1, 20, 4),
?line "[[97,97,1000]]" = p([[$a,$a,1000]], 1, 20, 5),
?line "[[...]]" = p([S1], 1, 20, 2),
% ?line "[\"aaaaaaaaaaaaaa\"\n \"aaaaaaaaaaaaaa\"\n \"aaaaaaaa\"...]" =
% ?line "[\"aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa\"...]" =
% p([S1], 1, 20, 11),
?line true = "[\"" ++ S1 ++ "\"]" =:= p([S1], 1, 210, -1),
?line "[[97,97,1000|...]]" = p([[$a,$a,1000,1000]], 1, 20, 5),
% ?line "[\"aaaa\"...]" = p(["aaaaa"], 1, 10, 3),
?line "[\"aaaaa\"]" = p(["aaaaa"], 1, 10, 6),
ok.
otp_6354(doc) ->
["OTP-6354. io_lib_pretty rewritten."];
otp_6354(suite) ->
[];
otp_6354(Config) when is_list(Config) ->
%% A few tuples:
?line "{}" = p({}, 1, 20, -1),
?line "..." = p({}, 1, 20, 0),
?line "{}" = p({}, 1, 20, 1),
?line "{}" = p({}, 1, 20, 2),
?line "{a}" = p({a}, 1, 20, -1),
?line "..." = p({a}, 1, 20, 0),
?line "{...}" = p({a}, 1, 20, 1),
?line "{a}" = p({a}, 1, 20, 2),
?line "{a,b}" = p({a,b}, 1, 20, -1),
?line "..." = p({a,b}, 1, 20, 0),
?line "{...}" = p({a,b}, 1, 20, 1),
?line "{a,...}" = p({a,b}, 1, 20, 2),
?line "{a,b}" = p({a,b}, 1, 20, 3),
?line "{}" = p({}, 1, 1, -1),
?line "..." = p({}, 1, 1, 0),
?line "{}" = p({}, 1, 1, 1),
?line "{}" = p({}, 1, 1, 2),
?line "{a}" = p({a}, 1, 1, -1),
?line "..." = p({a}, 1, 1, 0),
?line "{...}" = p({a}, 1, 1, 1),
?line "{a}" = p({a}, 1, 1, 2),
?line "{a,\n b}" = p({a,b}, 1, 1, -1),
?line "{1,\n b}" = p({1,b}, 1, 1, -1),
?line "..." = p({a,b}, 1, 1, 0),
?line "{...}" = p({a,b}, 1, 1, 1),
?line "{a,...}" = p({a,b}, 1, 1, 2),
?line "{a,\n b}" = p({a,b}, 1, 1, 3),
?line "{{}}" = p({{}}, 1, 1, 2),
?line "{[]}" = p({[]}, 1, 1, 2),
?line bt(<<"{1,2,a,b,{sfdsf,sdfdsfs},[sfsdf,sdfsdf]}">>,
p({1,2,a,b,{sfdsf,sdfdsfs},[sfsdf,sdfsdf]}, -1)),
?line bt(<<"{abcd,ddddd,\n ddddd}">>,
p({abcd,ddddd,ddddd}, 1,16, -1)),
?line bt(<<"{1,2,a,b,\n {sfdsf,sdfdsfs},\n [sfsdf,sdfsdf]}">>,
p({1,2,a,b,{sfdsf,sdfdsfs},[sfsdf,sdfsdf]}, 1, 35, 100)),
% With other terms than atomic ones on the same line:
% ?line bt(<<"{1,2,a,b,{sfdsf,sdfdsfs},\n [sfsdf,sdfsdf]}">>,
% p({1,2,a,b,{sfdsf,sdfdsfs},[sfsdf,sdfsdf]}, 1, 35, 100)),
% With line breaks:
% ?line bt(<<"{1,\n"
% " 2,\n"
% " a,\n"
% " b,\n"
% " {sfdsf,sdfdsfs},\n"
% " [sfsdf,sdfsdf]}">>,
% p({1,2,a,b,{sfdsf,sdfdsfs},[sfsdf,sdfsdf]}, 1, 35, 100)),
?line "{1,{1,{2,3}}}" = p({1,{1,{2,3}}}, 1, 80, 100),
?line bt(<<"{wwwww,{wwwww,{wwwww,{wwwww,{wwwww,lkjsldfj,klsdjfjklds,\n"
" sdkfjdsl,sdakfjdsklj,sdkljfsdj}}}}}">>,
p({wwwww,{wwwww,{wwwww,{wwwww,{wwwww,lkjsldfj,klsdjfjklds,
sdkfjdsl,sdakfjdsklj,sdkljfsdj}}}}}, -1)),
% With no restriction on number of characters per line:
% ?line bt(<<"{wwwww,{wwwww,{wwwww,{wwwww,{wwwww,lkjsldfj,klsdjfjklds,"
% "sdkfjdsl,sdakfjdsklj,\n"
% " sdkljfsdj}}}}}">>,
% p({wwwww,{wwwww,{wwwww,{wwwww,{wwwww,lkjsldfj,klsdjfjklds,
% sdkfjdsl,sdakfjdsklj,sdkljfsdj}}}}}, -1)),
% With line breaks:
% ?line bt(<<"{wwwww,{wwwww,{wwwww,{wwwww,{wwwww,lkjsldfj,\n"
% " klsdjfjklds,\n"
% " sdkfjdsl,\n"
% " sdakfjdsklj,\n"
% " sdkljfsdj}}}}}">>,
% p({wwwww,{wwwww,{wwwww,{wwwww,{wwwww,lkjsldfj,klsdjfjklds,
% sdkfjdsl,sdakfjdsklj,sdkljfsdj}}}}}, -1)),
?line bt(<<"{wwwww,\n"
" {wwwww,\n"
" {wwwww,\n"
" {wwwww,\n"
" {wwwww,\n"
" {lkjsldfj,\n"
" {klsdjfjklds,\n"
" {klajsljls,\n"
" #aaaaaaaaaaaaaaaaaaaaa"
"aaaaaaaaaaaaaaaaaaaaaaaaaaaaa{}}}}}}}}}">>,
p({wwwww,{wwwww,{wwwww,{wwwww,{wwwww,{lkjsldfj,
{klsdjfjklds,{klajsljls,
{aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa}}}}}}}}},
-1)),
?line "{{...},...}" = p({{a,b},{a,b,c},{d,e,f}},1,8,2),
%% Closing brackets and parentheses count:
?line "{{a,b,c},\n {{1,2,\n 3}}}" = p({{a,b,c},{{1,2,3}}},1,11,-1),
% With line breaks:
% ?line "{{a,b,c},\n {{1,\n 2,\n 3}}}" = p({{a,b,c},{{1,2,3}}},1,11,-1),
?line "{{a,b,c},\n [1,2,\n 3]}" = p({{a,b,c},[1,2,3]},1,10,-1),
% With line breaks:
% ?line "{{a,b,c},\n [1,\n 2,\n 3]}" = p({{a,b,c},[1,2,3]},1,10,-1),
?line "[{{a,b,c},\n {1,2,\n 3}}]" = p([{{a,b,c},{1,2,3}}],1,12,-1),
% With line breaks:
% ?line "[{{a,b,c},\n {1,\n 2,\n 3}}]" = p([{{a,b,c},{1,2,3}}],1,12,-1),
%% A few lists:
?line "[]" = p([], 1, 20, -1),
?line "..." = p([], 1, 20, 0),
?line "[]" = p([], 1, 20, 1),
?line "[]" = p([], 1, 20, 2),
?line "[a]" = p([a], 1, 20, -1),
?line "..." = p([a], 1, 20, 0),
?line "[...]" = p([a], 1, 20, 1),
?line "[a]" = p([a], 1, 20, 2),
?line "[a,b]" = p([a,b], 1, 20, -1),
?line "..." = p([a,b], 1, 20, 0),
?line "[...]" = p([a,b], 1, 20, 1),
?line "[a|...]" = p([a,b], 1, 20, 2),
?line "[a,b]" = p([a,b], 1, 20, 3),
?line "[a|b]" = p([a|b], 1, 20, -1),
?line "..." = p([a|b], 1, 20, 0),
?line "[...]" = p([a|b], 1, 20, 1),
?line "[a|...]" = p([a|b], 1, 20, 2),
?line "[a|b]" = p([a|b], 1, 20, 3),
?line "[]" = p([], 1, 1, -1),
?line "..." = p([], 1, 1, 0),
?line "[]" = p([], 1, 1, 1),
?line "[]" = p([], 1, 1, 2),
?line "[a]" = p([a], 1, 1, -1),
?line "..." = p([a], 1, 1, 0),
?line "[...]" = p([a], 1, 1, 1),
?line "[a]" = p([a], 1, 1, 2),
?line "[a,\n b]" = p([a,b], 1, 1, -1),
?line "..." = p([a,b], 1, 1, 0),
?line "[...]" = p([a,b], 1, 1, 1),
?line "[a|...]" = p([a,b], 1, 1, 2),
?line "[a,\n b]" = p([a,b], 1, 1, 3),
?line "[a|\n b]" = p([a|b], 1, 1, -1),
?line "..." = p([a|b], 1, 1, 0),
?line "[...]" = p([a|b], 1, 1, 1),
?line "[a|...]" = p([a|b], 1, 1, 2),
?line "[a|\n b]" = p([a|b], 1, 1, 3),
?line "[{}]" = p([{}], 1, 1, 2),
?line "[[]]" = p([[]], 1, 1, 2),
?line bt(<<"[1,2,a,b,{sfdsf,sdfdsfs},[sfsdf,sdfsdf]]">>,
p([1,2,a,b,{sfdsf,sdfdsfs},[sfsdf,sdfsdf]], -1)),
?line bt(<<"[1,2,a,b,\n {sfdsf,sdfdsfs},\n [sfsdf,sdfsdf]]">>,
p([1,2,a,b,{sfdsf,sdfdsfs},[sfsdf,sdfsdf]], 1, 35, 100)),
% With other terms than atomic ones on the same line:
% ?line bt(<<"[1,2,a,b,{sfdsf,sdfdsfs},\n [sfsdf,sdfsdf]]">>,
% p([1,2,a,b,{sfdsf,sdfdsfs},[sfsdf,sdfsdf]], 1, 35, 100)),
% With line breaks:
% ?line bt(<<"[1,\n"
% " 2,\n"
% " a,\n"
% " b,\n"
% " {sfdsf,sdfdsfs},\n"
% " [sfsdf,sdfsdf]]">>,
% p([1,2,a,b,{sfdsf,sdfdsfs},[sfsdf,sdfsdf]], 1, 35, 100)),
%% Element #8 is not printable:
?line "[49," ++ _ = p("1234567"++[3,4,5,6,7], 1, 100, 9),
% ?line "\"1234567\"..." = p("1234567"++[3,4,5,6,7], 1, 100, 8),
%% A few records:
%% -record(a, {}).
%% -record(a, {}).
?line "..." = p({a}, 0),
?line "{...}" = p({a}, 1),
?line "#a{}" = p({a}, 2),
?line "#a{}" = p({a}, -1),
%% -record(b, {f}).
?line "{...}" = p({b}, 1),
?line "..." = p({b,c}, 0),
?line "{...}" = p({b,c}, 1),
?line "#b{...}" = p({b,c}, 2),
?line "#b{f = c}" = p({b,c}, 3),
?line "#b{f = c}" = p({b,c}, -1),
?line "..." = p({b,{c,d}}, 0),
?line "{...}" = p({b,{c,d}}, 1),
?line "#b{...}" = p({b,{c,d}}, 2),
?line "#b{f = {...}}" = p({b,{c,d}}, 3),
?line "#b{f = {c,...}}" = p({b,{c,d}}, 4),
?line "#b{f = {c,d}}" = p({b,{c,d}}, 5),
?line "#b{f = {...}}" = p({b,{b,c}}, 3),
?line "#b{f = #b{...}}" = p({b,{b,c}}, 4),
?line "#b{f = #b{f = c}}" = p({b,{b,c}}, 5),
%% -record(c, {f1, f2}).
?line "#c{f1 = d,f2 = e}" = p({c,d,e}, -1),
?line "..." = p({c,d,e}, 0),
?line "{...}" = p({c,d,e}, 1),
?line "#c{...}" = p({c,d,e}, 2),
?line "#c{f1 = d,...}" = p({c,d,e}, 3),
?line "#c{f1 = d,f2 = e}" = p({c,d,e}, 4),
%% -record(d, {a..., b..., c.., d...}).
?line bt(<<"#d{aaaaaaaaaaaaaaaaaaaa = 1,bbbbbbbbbbbbbbbbbbbb = 2,\n"
" cccccccccccccccccccc = 3,dddddddddddddddddddd = 4,\n"
" eeeeeeeeeeeeeeeeeeee = 5}">>,
p({d,1,2,3,4,5}, -1)),
% With no restriction on number of characters per line:
% ?line bt(<<"#d{aaaaaaaaaaaaaaaaaaaa = 1,bbbbbbbbbbbbbbbbbbbb = 2,"
% "cccccccccccccccccccc = 3,\n dddddddddddddddddddd = 4,"
% "eeeeeeeeeeeeeeeeeeee = 5}">>,
% p({d,1,2,3,4,5}, -1)),
% With line breaks:
% ?line bt(<<"#d{aaaaaaaaaaaaaaaaaaaa = 1,\n"
% " bbbbbbbbbbbbbbbbbbbb = 2,\n"
% " cccccccccccccccccccc = 3,\n"
% " dddddddddddddddddddd = 4,\n"
% " eeeeeeeeeeeeeeeeeeee = 5}">>,
% p({d,1,2,3,4,5}, -1)),
?line "..." = p({d,1,2,3,4,5}, 0),
?line "{...}" = p({d,1,2,3,4,5}, 1),
?line "#d{...}" = p({d,1,2,3,4,5}, 2),
?line "#d{aaaaaaaaaaaaaaaaaaaa = 1,...}" = p({d,1,2,3,4,5}, 3),
?line bt(<<"#d{aaaaaaaaaaaaaaaaaaaa = 1,bbbbbbbbbbbbbbbbbbbb = 2,...}">>,
p({d,1,2,3,4,5}, 4)),
?line bt(<<"#d{aaaaaaaaaaaaaaaaaaaa = 1,bbbbbbbbbbbbbbbbbbbb = 2,\n"
" cccccccccccccccccccc = 3,...}">>,
p({d,1,2,3,4,5}, 5)), % longer than 80 characters...
% With no restriction on number of characters per line:
% ?line bt(<<"#d{aaaaaaaaaaaaaaaaaaaa = 1,bbbbbbbbbbbbbbbbbbbb = 2,"
% "cccccccccccccccccccc = 3,...}">>,
% p({d,1,2,3,4,5}, 5)), % longer than 80 characters...
% With line breaks:
% ?line bt(<<"#d{aaaaaaaaaaaaaaaaaaaa = 1,\n"
% " bbbbbbbbbbbbbbbbbbbb = 2,\n"
% " cccccccccccccccccccc = 3,...}">>,
% p({d,1,2,3,4,5}, 5)),
?line bt(<<"#d{aaaaaaaaaaaaaaaaaaaa = 1,bbbbbbbbbbbbbbbbbbbb = 2,\n"
" cccccccccccccccccccc = 3,dddddddddddddddddddd = 4,...}">>,
p({d,1,2,3,4,5}, 6)),
% With no restriction on number of characters per line:
% ?line bt(<<"#d{aaaaaaaaaaaaaaaaaaaa = 1,bbbbbbbbbbbbbbbbbbbb = 2,"
% "cccccccccccccccccccc = 3,\n dddddddddddddddddddd = 4,...}">>,
% p({d,1,2,3,4,5}, 6)),
% With line breaks:
% ?line bt(<<"#d{aaaaaaaaaaaaaaaaaaaa = 1,\n"
% " bbbbbbbbbbbbbbbbbbbb = 2,\n"
% " cccccccccccccccccccc = 3,\n"
% " dddddddddddddddddddd = 4,...}">>,
% p({d,1,2,3,4,5}, 6)),
?line bt(<<"#d{aaaaaaaaaaaaaaaaaaaa = 1,bbbbbbbbbbbbbbbbbbbb = 2,\n"
" cccccccccccccccccccc = 3,dddddddddddddddddddd = 4,\n"
" eeeeeeeeeeeeeeeeeeee = 5}">>,
p({d,1,2,3,4,5}, 7)),
% With no restriction on number of characters per line:
% ?line bt(<<"#d{aaaaaaaaaaaaaaaaaaaa = 1,bbbbbbbbbbbbbbbbbbbb = 2,"
% "cccccccccccccccccccc = 3,\n dddddddddddddddddddd = 4,"
% "eeeeeeeeeeeeeeeeeeee = 5}">>,
% p({d,1,2,3,4,5}, 7)),
% With line breaks:
% ?line bt(<<"#d{aaaaaaaaaaaaaaaaaaaa = 1,\n"
% " bbbbbbbbbbbbbbbbbbbb = 2,\n"
% " cccccccccccccccccccc = 3,\n"
% " dddddddddddddddddddd = 4,\n"
% " eeeeeeeeeeeeeeeeeeee = 5}">>,
% p({d,1,2,3,4,5}, 7)),
?line bt(<<"#rrrrr{\n"
" f1 = 1,\n"
" f2 = #rrrrr{f1 = a,f2 = b,f3 = c},\n"
" f3 = \n"
" #rrrrr{\n"
" f1 = h,f2 = i,\n"
" f3 = \n"
" #rrrrr{\n"
" f1 = aa,\n"
" f2 = \n"
" #rrrrr{\n"
" f1 = #rrrrr{f1 = a,f2 = b,f3 = c},\n"
" f2 = 2,f3 = 3},\n"
" f3 = bb}}}">>,
p({rrrrr,1,{rrrrr,a,b,c},{rrrrr,h,i,
{rrrrr,aa,{rrrrr,{rrrrr,a,b,c},
2,3},bb}}},
-1)),
% With other terms than atomic ones on the same line:
% ?line bt(<<"#rrrrr{\n"
% " f1 = 1,f2 = #rrrrr{f1 = a,f2 = b,f3 = c},\n"
% " f3 = \n"
% " #rrrrr{\n"
% " f1 = h,f2 = i,\n"
% " f3 = \n"
% " #rrrrr{\n"
% " f1 = aa,\n"
% " f2 = \n"
% " #rrrrr{\n"
% " f1 = #rrrrr{f1 = a,f2 = b,"
% "f3 = c},f2 = 2,f3 = 3},\n"
% " f3 = bb}}}">>,
% p({rrrrr,1,{rrrrr,a,b,c},{rrrrr,h,i,
% {rrrrr,aa,{rrrrr,{rrrrr,a,b,c},
% 2,3},bb}}},
% -1)),
% With line breaks:
% ?line bt(<<"#rrrrr{\n"
% " f1 = 1,\n"
% " f2 = #rrrrr{f1 = a,f2 = b,f3 = c},\n"
% " f3 = \n"
% " #rrrrr{\n"
% " f1 = h,\n"
% " f2 = i,\n"
% " f3 = \n"
% " #rrrrr{\n"
% " f1 = aa,\n"
% " f2 = \n"
% " #rrrrr{\n"
% " f1 = #rrrrr{f1 = a,f2 = b,"
% "f3 = c},\n"
% " f2 = 2,\n"
% " f3 = 3},\n"
% " f3 = bb}}}">>,
% p({rrrrr,1,{rrrrr,a,b,c},{rrrrr,h,i,
% {rrrrr,aa,{rrrrr,{rrrrr,a,b,c},
% 2,3},bb}}},
% -1)),
?line bt(<<"#d{aaaaaaaaaaaaaaaaaaaa = 1,\n"
" bbbbbbbbbbbbbbbbbbbb = \n"
" #d{aaaaaaaaaaaaaaaaaaaa = a,bbbbbbbbbbbbbbbbbbbb = b,\n"
" cccccccccccccccccccc = c,dddddddddddddddddddd = d,\n"
" eeeeeeeeeeeeeeeeeeee = e},\n"
" cccccccccccccccccccc = 3,\n"
" dddddddddddddddddddd = \n"
" #d{aaaaaaaaaaaaaaaaaaaa = h,bbbbbbbbbbbbbbbbbbbb = i,\n"
" cccccccccccccccccccc = \n"
" #d{aaaaaaaaaaaaaaaaaaaa = aa,"
"bbbbbbbbbbbbbbbbbbbb = bb,\n"
" cccccccccccccccccccc = \n"
" #d{aaaaaaaaaaaaaaaaaaaa = 1,"
"bbbbbbbbbbbbbbbbbbbb = 2,\n"
" cccccccccccccccccccc = 3,"
"dddddddddddddddddddd = 4,\n"
" eeeeeeeeeeeeeeeeeeee = 5},\n"
" dddddddddddddddddddd = dd,"
"eeeeeeeeeeeeeeeeeeee = ee},\n"
" dddddddddddddddddddd = k,"
"eeeeeeeeeeeeeeeeeeee = l},\n"
" eeeeeeeeeeeeeeeeeeee = 5}">>,
p({d,1,{d,a,b,c,d,e},3,{d,h,i,{d,aa,bb,{d,1,2,3,4,5},dd,ee},
k,l},5}, -1)),
% With line breaks:
% ?line bt(<<"#d{aaaaaaaaaaaaaaaaaaaa = 1,\n"
% " bbbbbbbbbbbbbbbbbbbb = \n"
% " #d{aaaaaaaaaaaaaaaaaaaa = a,\n"
% " bbbbbbbbbbbbbbbbbbbb = b,\n"
% " cccccccccccccccccccc = c,\n"
% " dddddddddddddddddddd = d,\n"
% " eeeeeeeeeeeeeeeeeeee = e},\n"
% " cccccccccccccccccccc = 3,\n"
% " dddddddddddddddddddd = \n"
% " #d{aaaaaaaaaaaaaaaaaaaa = h,\n"
% " bbbbbbbbbbbbbbbbbbbb = i,\n"
% " cccccccccccccccccccc = \n"
% " #d{aaaaaaaaaaaaaaaaaaaa = aa,\n"
% " bbbbbbbbbbbbbbbbbbbb = bb,\n"
% " cccccccccccccccccccc = \n"
% " #d{aaaaaaaaaaaaaaaaaaaa = 1,\n"
% " bbbbbbbbbbbbbbbbbbbb = 2,\n"
% " cccccccccccccccccccc = 3,\n"
% " dddddddddddddddddddd = 4,\n"
% " eeeeeeeeeeeeeeeeeeee = 5},\n"
% " dddddddddddddddddddd = dd,\n"
% " eeeeeeeeeeeeeeeeeeee = ee},\n"
% " dddddddddddddddddddd = k,\n"
% " eeeeeeeeeeeeeeeeeeee = l},\n"
% " eeeeeeeeeeeeeeeeeeee = 5}">>,
% p({d,1,{d,a,b,c,d,e},3,{d,h,i,{d,aa,bb,{d,1,2,3,4,5},dd,ee},
% k,l},5}, -1)),
A = aaaaaaaaaaaaa,
%% Print the record with dots at the end of the line (Ll = 80).
?line "{aaaaaaa" ++ _ =
p({A,{A,{A,{A,{A,{A,{A,{A,{A,{A,{A,{A,{A,{A,{A,{A,{A,{A,{A,{A,{A,
{A,{A,{A,{A,{A,{A,{A,{A,{A,{A,{A,{A,{A,{A,{A,{A,{A,{A,{A,{A,
{A,{A,{A,{A,{A,{A,{A,{A,{A,{A,{A,{A,{A,{A,{A,{A,{A,{A,{A,{A,
{A,{A,{ggg,{hhh,{ii,{jj,{kk,{ll,{mm,{nn,{oo,{d,1,2,3,4,5}
}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}
}}}}}}}}}}}}}}}}, 146),
?line "{aaaaaaa" ++ _ =
p({A,{A,{A,{A,{A,{A,{A,{A,{A,{A,{A,{A,{A,{A,{A,{A,{A,{A,{A,{A,{A,
{A,{A,{A,{A,{A,{A,{A,{A,{A,{A,{A,{A,{A,{A,{A,{A,{A,{A,{A,{A,
{A,{A,{A,{A,{A,{A,{A,{A,{A,{A,{A,{A,{A,{A,{A,{A,{A,{A,{A,{A,
{A,{A,{A,{A,{A,{ggg,{hhh,{ii,{jj,{kk,{ll,{mm,{nn,{oo,{a}
}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}
}}}}}}}}}}}}}}}}}}}, 152),
?line bt(<<"{aaaaaaaaaaaaa,\n"
" {aaaaaaaaaaaaa,\n"
" {aaaaaaaaaaaaa,\n"
" {aaaaaaaaaaaaa,\n"
" {aaaaaaaaaaaaa,\n"
" {aaaaaaaaaaaaa,\n"
" {g,{h,{i,{j,{k,{l,{m,{n,{o,#"
"d{...}}}}}}}}}}}}}}}}">>,
p({A,{A,{A,{A,{A,{A,
{g,{h,{i,{j,{k,{l,{m,{n,{o,{d,1,2,3,4,5}}}}}}}}}}}}}}}}, 32)),
?line bt(<<"{a,#b{f = {c,{d,{e,{f,...}}}}}}">>,
p({a,{b,{c,{d,{e,{f,g}}}}}}, 12)),
?line bt(<<"{aaaaaaaaaaaaa,\n"
" {aaaaaaaaaaaaa,\n"
" {aaaaaaaaaaaaa,\n"
" {aaaaaaaaaaaaa,\n"
" {aaaaaaaaaaaaa,\n"
" {aaaaaaaaaaaaa,\n"
" {aaaaaaaaaaaaa,\n"
" {aaaaaaaaaaaaa,\n"
" {aaaaaaaaaaaaa,#c{f1 = ddd,"
"f2 = eee}}}}}}}}}}">>,
p({A,{A,{A,{A,{A,{A,{A,{A,{A,{c,ddd,eee}}}}}}}}}}, 100)),
?line bt(<<"{aaaaaaaaaaaaa,\n"
" {aaaaaaaaaaaaa,{aaaaaaaaaaaaa,{aaaaaaaaaaaaa,...}}}}">>,
p({A,{A,{A,{A,{b}}}}}, 8)),
% With no restriction on number of characters per line:
% ?line bt(<<"{aaaaaaaaaaaaa,{aaaaaaaaaaaaa,{aaaaaaaaaaaaa,"
% "{aaaaaaaaaaaaa,...}}}}">>,
% p({A,{A,{A,{A,{b}}}}}, 8)),
?line bt(<<"{aaaaaaaaaaaaa,\n"
" {aaaaaaaaaaaaa,\n"
" {aaaaaaaaaaaaa,{aaaaaaaaaaaaa,{aaaaaaaaaaaaa,...}}}}}">>,
p({A,{A,{A,{A,{A,{b}}}}}}, 10)),
% With no restriction on number of characters per line:
% ?line bt(<<"{aaaaaaaaaaaaa,\n"
% " {aaaaaaaaaaaaa,{aaaaaaaaaaaaa,{aaaaaaaaaaaaa,"
% "{aaaaaaaaaaaaa,...}}}}}">>,
% p({A,{A,{A,{A,{A,{b}}}}}}, 10)),
?line bt(<<"{aaaaaaaaaaaaa,\n"
" {aaaaaaaaaaaaa,\n"
" {aaaaaaaaaaaaa,\n"
" {aaaaaaaaaaaaa,\n"
" {aaaaaaaaaaaaa,\n"
" {aaaaaaaaaaaaa,\n"
" {aaaaaaaaaaaaa,\n"
" {aaaaaaaaaaaaa,\n"
" {aaaaaaaaaaaaa,"
"{aaaaaaaaaaaaa,#a{}}}}}}}}}}}">>,
p({A,{A,{A,{A,{A,{A,{A,{A,{A,{A,{a}}}}}}}}}}}, 23)),
?line bt(<<"{aaaaaaaaaaaaa,\n"
" {aaaaaaaaaaaaa,\n"
" {aaaaaaaaaaaaa,\n",
" #rrrrr{\n"
" f1 = kljlkjlksfdgkljlsdkjf,"
"f2 = kljkljsdaflkjlkjsdf,...}}}}">>,
p({A,{A,{A,{rrrrr, kljlkjlksfdgkljlsdkjf,
kljkljsdaflkjlkjsdf,
asdfkldsjfklkljsdklfds}}}}, 10)),
% With no restriction on number of characters per line:
% ?line bt(<<"{aaaaaaaaaaaaa,\n"
% " {aaaaaaaaaaaaa,\n"
% " {aaaaaaaaaaaaa,\n",
% " #rrrrr{f1 = kljlkjlksfdgkljlsdkjf,f2 = "
% "kljkljsdaflkjlkjsdf,...}}}}">>,
% p({A,{A,{A,{rrrrr, kljlkjlksfdgkljlsdkjf,
% kljkljsdaflkjlkjsdf,
% asdfkldsjfklkljsdklfds}}}}, 10)),
?line bt(<<"{aaaaaaaaaaaaa,\n"
" {aaaaaaaaaaaaa,\n"
" {aaaaaaaaaaaaa,\n"
" {aaaaaaaaaaaaa,\n"
" {aaaaaaaaaaaaa,\n"
" {aaaaaaaaaaaaa,\n"
" {aaaaaaaaaaaaa,\n"
" {g,{h,{i,{j,{k,{l,{m,{n,"
"{o,#a{}}}}}}}}}}}}}}}}}">>,
p({A,{A,{A,{A,{A,{A,{A,
{g,{h,{i,{j,{k,{l,{m,{n,{o,{a}}}}}}}}}}}}}}}}}, 100)),
?line bt(<<"#c{\n"
" f1 = \n"
" #c{\n"
" f1 = \n"
" #c{\n"
" f1 = \n"
" #c{\n"
" f1 = \n"
" #c{\n"
" f1 = \n"
" #c{\n"
" f1 = \n"
" #c{\n"
" f1 = \n"
" #c{\n"
" f1 = \n"
" #c{\n"
" f1 = #c{f1 = #c{f1 = #c{f1 = a,"
"f2 = b},f2 = b},f2 = b},\n"
" f2 = b},\n"
" f2 = b},\n"
" f2 = b},\n"
" f2 = b},\n"
" f2 = b},\n"
" f2 = b},\n"
" f2 = b},\n"
" f2 = b},\n"
" f2 = b}">>,
p({c,{c,{c,{c,{c,{c,{c,{c,{c,{c,{c,{c,a,b},b},b},b},b},b},
b},b},b},b},b},b}, -1)),
?line bt(<<"#rrrrr{\n"
" f1 = \n"
" #rrrrr{\n"
" f1 = \n"
" #rrrrr{\n"
" f1 = \n"
" #rrrrr{\n"
" f1 = \n"
" {rrrrr,{rrrrr,a,#rrrrr{f1 = {rrrrr,1,2},f2 = a,"
"f3 = b}},b},\n"
" f2 = {rrrrr,c,d},\n"
" f3 = {rrrrr,1,2}},\n"
" f2 = 1,f3 = 2},\n"
" f2 = 3,f3 = 4},\n"
" f2 = 5,f3 = 6}">>,
p({rrrrr,{rrrrr,{rrrrr,{rrrrr,{rrrrr,{rrrrr,a,{rrrrr,
{rrrrr,1,2},a,b}},b},{rrrrr,c,d},{rrrrr,1,2}},
1,2},3,4},5,6}, -1)),
% With other terms than atomic ones on the same line:
% ?line bt(<<"#rrrrr{\n"
% " f1 = \n"
% " #rrrrr{\n"
% " f1 = \n"
% " #rrrrr{\n"
% " f1 = \n"
% " #rrrrr{\n"
% " f1 = \n"
% " {rrrrr,{rrrrr,a,#rrrrr{f1 = {rrrrr,1,2},f2 = a,"
% "f3 = b}},b},\n"
% " f2 = {rrrrr,c,d},f3 = {rrrrr,1,2}},\n"
% " f2 = 1,f3 = 2},\n"
% " f2 = 3,f3 = 4},\n"
% " f2 = 5,f3 = 6}">>,
% p({rrrrr,{rrrrr,{rrrrr,{rrrrr,{rrrrr,{rrrrr,a,{rrrrr,
% {rrrrr,1,2},a,b}},b},{rrrrr,c,d},{rrrrr,1,2}},
% 1,2},3,4},5,6}, -1)),
% With no restriction on number of characters per line:
% ?line bt(<<"#rrrrr{\n"
% " f1 = \n"
% " #rrrrr{\n"
% " f1 = \n"
% " #rrrrr{\n"
% " f1 = \n"
% " #rrrrr{\n"
% " f1 = {rrrrr,{rrrrr,a,#rrrrr{f1 = {rrrrr,1,2},f2 = a,"
% "f3 = b}},b},\n"
% " f2 = {rrrrr,c,d},f3 = {rrrrr,1,2}},\n"
% " f2 = 1,f3 = 2},\n"
% " f2 = 3,f3 = 4},\n"
% " f2 = 5,f3 = 6}">>,
% p({rrrrr,{rrrrr,{rrrrr,{rrrrr,{rrrrr,{rrrrr,a,{rrrrr,
% {rrrrr,1,2},a,b}},b},{rrrrr,c,d},{rrrrr,1,2}},
% 1,2},3,4},5,6}, -1)),
% With line breaks:
% ?line bt(<<"#rrrrr{\n"
% " f1 = \n"
% " #rrrrr{\n"
% " f1 = \n"
% " #rrrrr{\n"
% " f1 = \n"
% " #rrrrr{\n"
% " f1 = {rrrrr,{rrrrr,a,#rrrrr{f1 = {rrrrr,1,2},f2 = a,"
% "f3 = b}},b},\n"
% " f2 = {rrrrr,c,d},\n"
% " f3 = {rrrrr,1,2}},\n"
% " f2 = 1,\n"
% " f3 = 2},\n"
% " f2 = 3,\n"
% " f3 = 4},\n"
% " f2 = 5,\n"
% " f3 = 6}">>,
% p({rrrrr,{rrrrr,{rrrrr,{rrrrr,{rrrrr,{rrrrr,a,{rrrrr,
% {rrrrr,1,2},a,b}},b},{rrrrr,c,d},{rrrrr,1,2}},
% 1,2},3,4},5,6}, -1)),
?line "{aaa,\n {aaa," ++ _ =
p({aaa,{aaa,{aaa,{aaa,{aaa,{aaa,{aaa,{aaa,{aaa,{aaa,{aaa,{aaa,{aaa,
{aaa,{aaa,{aaa,{aaa,{aaa,{aaa,{aaa,{aaa,{aaa,{aaa,{aaa,{aaa,
{aaa,{aaa,{aaa,{aaa,{aaa,{aaa,{aaa,{aaa,{aaa,{aaa,{aaa,
{aaa,{aaa,{aaa,{aaa,{aaa,{aaa,{aaa,{aaa,{aaa,{aaa,
{aaa,a}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}},
1, 80, -1),
%% A few other cases...
?line "{a,#Fun<" ++ _ = lists:flatten(io_lib_pretty:print({a,fun fmt/2})),
?line "#Fun<" ++ _ = io_lib_pretty:print(fun() -> foo end),
% ?line "[<<\"foobar\">>|<<\"barf\"...>>]" =
% p([<<"foobar">>|<<"barfoo">>], 1, 30, 4),
%% No support for negative columns any more:
?line "[a,\n [b,\n c,\n d,\n [e,\n f]],\n c]" =
p([a,[b,c,d,[e,f]],c], -1, 2, 10),
?line "[a,\n [b,\n c,\n d,\n [e,\n f]],\n c]" =
p([a,[b,c,d,[e,f]],c], 0, 2, 10),
%% 20 bytes are tried first, then the rest. Try 21 bytes:
L = lists:duplicate(20, $a),
% ?line bt(<<"<<\"aaaaaa\"\n \"aaaaaa\"\n \"aaaaaa\"\n \"aaa\">>">>,
?line bt(<<"<<\"aaaaaaaaaaaaaaaaaaaaa\">>">>,
p(list_to_binary([$a | L]), 1, 10, -1)),
?line "<<97," ++ _ = p(list_to_binary(L ++ [3]), 1, 10, -1),
% ?line "<<\"aaaa\"...>>" = p(list_to_binary(L ++ [3]), 1, 10, 2),
% ?line "<<\"aaaaaa\"\n \"aa\"...>>" =
% ?line "<<\"aaaaaaaa\"...>>" =
% p(list_to_binary(L ++ [3]), 1, 10, 3),
% ?line "<<\"aaaaaa\"\n \"aaaaaa\"\n \"aaaaaa\"\n \"aa\"...>>" =
% ?line "<<\"aaaaaaaaaaaaaaaaaaaa\"...>>" =
% p(list_to_binary(L ++ [3]), 1, 10, 21),
?line "<<97," ++ _ = p(list_to_binary(L ++ [3]), 1, 10, 22),
?line "\"\\b\\t\\n\\v\\f\\r\\e\250\"" =
p([8,9,10,11,12,13,27,168], 1, 40, -1),
% ?line "\"\\b\\t\\n\"\n \"\\v\\f\\r\"\n \"\\e\250\"" =
?line "\"\\b\\t\\n\\v\\f\\r\\e¨\"" =
p([8,9,10,11,12,13,27,168], 1, 10, -1),
?line "\"\\b\\t\\n\\v\\f\\r\\e\250\"" =
p([8,9,10,11,12,13,27,168], 1, 40, 100),
% ?line "\"\\e\\t\\nab\"\n \"cd\"" =
?line "\"\\e\\t\\nabcd\"" =
p("\e\t\nabcd", 1, 12, -1),
%% DEL (127) is special...
?line "[127]" = p("\d", 1, 10, -1),
?line "[127]" = p([127], 1, 10, 100),
?line "<<\"\\b\\t\\n\\v\\f\\r\\e\250\">>" =
p(<<8,9,10,11,12,13,27,168>>, 1, 40, -1),
?line "<<\"\\b\\t\\n\\v\\f\\r\\e\250\">>" =
p(<<8,9,10,11,12,13,27,168>>, 1, 10, -1),
?line "<<127>>" = p(<<127>>, 1, 10, 100),
%% "Partial" string binaries:
?line "<<\"he\"...>>" = p(list_to_binary("he"++[3]), 1, 80, 2),
?line "<<\"he\"...>>" = p(list_to_binary("he"++[3]), 1, 80, 3),
?line "<<104,101,3>>" = p(list_to_binary("he"++[3]), 1, 80, 4),
?line "<<...>>" = p(list_to_binary([3] ++ "he"), 1, 80, 1),
?line "<<3,...>>" = p(list_to_binary([3] ++ "he"), 1, 80, 2),
?line "<<3,104,...>>" = p(list_to_binary([3] ++ "he"), 1, 80, 3),
?line "<<\"12345678901234567890\"...>>" =
p(list_to_binary("12345678901234567890"++[3]), 1, 80, 8),
?line "<<\"12345678901234567890\"...>>" =
p(list_to_binary("12345678901234567890"++[3]), 1, 80, 21),
?line "<<49," ++ _ =
p(list_to_binary("12345678901234567890"++[3]), 1, 80, 22),
?line "{sdfsdfj,\n 23" ++ _ =
p({sdfsdfj,23423423342.23432423}, 1, 17, -1),
?line bt(<<"kljkljlksdjjlf kljalkjlsdajafasjdfj [kjljklasdf,kjlljsfd,sdfsdkjfsd,kjjsdf,jl,
lkjjlajsfd|jsdf]">>,
fmt("~w ~w ~p",
[kljkljlksdjjlf,
kljalkjlsdajafasjdfj,
[kjljklasdf,kjlljsfd,sdfsdkjfsd,kjjsdf,jl,lkjjlajsfd |
jsdf]])),
%% Binaries are split as well:
?line bt(<<"<<80,100,0,55,55,55,55,55,55,55,55,55,\n "
"55,55,55,55,55,55,55,...>>">>,
p(<<80,100,0,55,55,55,55,55,55,55,55,55,55,55,55,55,55,55,
55,55,55,55,55,55,55,55,55,55,55,55>>,1,40,20)),
?line bt(<<"<<80,100,0,55,55,55,55,55,55,55,55,55,\n "
"55,55,55,55,55,55,55,55,55,55,55,55,\n 55,55,55,55,55,55>>">>,
p(<<80,100,0,55,55,55,55,55,55,55,55,55,55,55,55,55,55,55,
55,55,55,55,55,55,55,55,55,55,55,55>>,1,40,-1)),
?line "<<0,0,0,\n ...>>" = p(<<0,0,0,0,0>>, 1, 10, 4),
%% ~W now uses ",..." when printing tuples
?line "[a,b|...]" = fmt("~W", [[a,b,c,d,e], 3]),
?line "{a,b,...}" = fmt("~W", [{a,b,c,d,e}, 3]),
ok.
otp_6495(doc) ->
["OTP-6495. io_lib_pretty bugfix."];
otp_6495(suite) ->
[];
otp_6495(Config) when is_list(Config) ->
?line bt(<<"[120,120,120,120,120,120,120,120,120,120,120,120,120,120,"
"120,120,120,120,120]<<1>>">>,
fmt("~w~p", ["xxxxxxxxxxxxxxxxxxx", <<1>>])),
ok.
otp_6517(doc) ->
["OTP-6517. The Format argument of fwrite can be a binary."];
otp_6517(suite) ->
[];
otp_6517(Config) when is_list(Config) ->
?line "string" = fmt(<<"~s">>, [<<"string">>]),
ok.
otp_6502(doc) ->
["OTP-6502. Bits."];
otp_6502(suite) ->
[];
otp_6502(Config) when is_list(Config) ->
?line bt(<<
"[0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25]"
"<<0,0,8,\n"
" "
" 1:1>>">>,
fmt("~w~p", [lists:seq(0, 25), <<17:25>>])),
ok.
otp_7421(doc) ->
["OTP-7421. Soft limit of 60 chars removed when pretty printing."];
otp_7421(suite) ->
[];
otp_7421(Config) when is_list(Config) ->
bt(<<"{aa,bb,\n"
" c,dd,\n"
" eee,\n"
" fff}">>,
rp({aa,bb,c,dd,eee,fff}, 1, 80, -1, 5, none)),
bt(<<"{aa,bb,\n"
" c,\n"
" dd,\n"
" eee,\n"
" fff}">>,
rp({aa,bb,c,dd,eee,fff}, 1, 80, -1, 4, none)),
ok.
bt(Bin, R) ->
R = binary_to_list(Bin).
p(Term, D) ->
rp(Term, 1, 80, D).
p(Term, Col, Ll, D) ->
rp(Term, Col, Ll, D, no_fun).
rp(Term, Col, Ll, D) ->
rp(Term, Col, Ll, D, fun rfd/2).
-define(MAXCS, 60).
rp(Term, Col, Ll, D, RF) ->
rp(Term, Col, Ll, D, ?MAXCS, RF).
rp(Term, Col, Ll, D, M, RF) ->
%% io:format("~n~n*** Col = ~p Ll = ~p D = ~p~n~p~n-->~n",
%% [Col, Ll, D, Term]),
R = io_lib_pretty:print(Term, Col, Ll, D, M, RF),
%% io:format("~s~n<--~n", [R]),
lists:flatten(io_lib:format("~s", [R])).
fmt(Fmt, Args) ->
lists:flatten(io_lib:format(Fmt, Args)).
rfd(a, 0) ->
[];
rfd(b, 1) ->
[f];
rfd(c, 2) ->
[f1, f2];
rfd(e, 3) ->
[f, g, h];
rfd(d, 5) ->
[aaaaaaaaaaaaaaaaaaaa, bbbbbbbbbbbbbbbbbbbb,
cccccccccccccccccccc, dddddddddddddddddddd,
eeeeeeeeeeeeeeeeeeee];
rfd(rrrrr, 3) ->
[f1, f2, f3];
rfd(aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa, 0) ->
[];
rfd(_, _) ->
no.
manpage(doc) ->
["The examples in io(3) and io_lib(3)."];
manpage(suite) ->
[];
manpage(Config) when is_list(Config) ->
%% The examples that write or print only, not the ones that read...
?line bt(<<"Hello world!\n">>,
fmt("Hello world!~n", [])),
?line bt(<<"| aaaaa|bbbbb |ccccc|\n">>, % bugfix
fmt("|~10.5c|~-10.5c|~5c|~n", [$a, $b, $c])),
?line bt(<<"|**********|\n">>,
fmt("|~10w|~n", [{hey, hey, hey}])),
?line bt(<<"|{hey,hey,h|\n">>,
fmt("|~10s|~n", [io_lib:write({hey, hey, hey})])),
T = [{attributes,[[{id,age,1.50000},{mode,explicit},
{typename,"INTEGER"}], [{id,cho},{mode,explicit},{typename,'Cho'}]]},
{typename,'Person'},{tag,{'PRIVATE',3}},{mode,implicit}],
?line bt(<<"[{attributes,[[{id,age,1.5},{mode,explicit},{typename,"
"[73,78,84,69,71,69,82]}],[{id,cho},{mode,explicit},"
"{typename,'Cho'}]]},{typename,'Person'},{tag,{'PRIVATE',3}},"
"{mode,implicit}]\n">>,
fmt("~w~n", [T])),
?line bt(<<"[{attributes,[[{id,age,1.5},\n"
" {mode,explicit},\n"
" {typename,\"INTEGER\"}],\n"
" [{id,cho},{mode,explicit},{typename,'Cho'}]]},\n"
" {typename,'Person'},\n"
" {tag,{'PRIVATE',3}},\n"
" {mode,implicit}]\n">>,
fmt("~62p~n", [T])),
?line bt(<<"Here T = [{attributes,[[{id,age,1.5},\n"
" {mode,explicit},\n"
" {typename,\"INTEGER\"}],\n"
" [{id,cho},\n"
" {mode,explicit},\n"
" {typename,'Cho'}]]},\n"
" {typename,'Person'},\n"
" {tag,{'PRIVATE',3}},\n"
" {mode,implicit}]\n">>,
fmt("Here T = ~62p~n", [T])),
?line bt(<<"[{attributes,[[{id,age,1.5},{mode,explicit},"
"{typename,...}],[{id,cho},{mode,...},{...}]]},"
"{typename,'Person'},{tag,{'PRIVATE',3}},{mode,implicit}]\n">>,
fmt("~W~n", [T,9])),
?line bt(<<"[{attributes,[[{id,age,1.5},{mode,explicit},{typename,...}],"
"\n "
"[{id,cho},{mode,...},{...}]]},\n {typename,'Person'},\n "
"{tag,{'PRIVATE',3}},\n {mode,implicit}]\n">>,
fmt("~62P~n", [T,9])),
?line "1F\n" = fmt("~.16B~n", [31]),
?line "-10011\n" = fmt("~.2B~n", [-19]),
?line "5Z\n" = fmt("~.36B~n", [5*36+35]),
?line "10#31\n" = fmt("~X~n", [31,"10#"]),
?line "-0x1F\n" = fmt("~.16X~n", [-31,"0x"]),
?line "10#31\n" = fmt("~.10#~n", [31]),
?line "-16#1F\n" = fmt("~.16#~n", [-31]),
?line "abc def 'abc def' {foo,1} A \n" =
fmt("~s ~w ~i ~w ~c ~n",
['abc def', 'abc def', {foo, 1},{foo, 1}, 65]),
% fmt("~s", [65]),
%% io_lib(3)
?line bt(<<"{1,[2],[3],[...],...}">>,
lists:flatten(io_lib:write({1,[2],[3],[4,5],6,7,8,9}, 5))),
ok.
otp_6708(doc) ->
["OTP-6708. Fewer newlines when pretty-printing."];
otp_6708(suite) ->
[];
otp_6708(Config) when is_list(Config) ->
?line bt(<<"[1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,\n"
" 23,24,25,26,27,28,29|...]">>,
p(lists:seq(1,1000), 30)),
?line bt(<<"{lkjasklfjsdak,mlkasjdflksj,klasdjfklasd,jklasdfjkl,\n"
" jklsdjfklsd,masdfjkkl}">>,
p({lkjasklfjsdak,mlkasjdflksj,klasdjfklasd,jklasdfjkl,
jklsdjfklsd, masdfjkkl}, -1)),
?line bt(<<"#b{f = {lkjljalksdf,jklaskfjd,kljasdlf,kljasdf,kljsdlkf,\n"
" kjdd}}">>,
p({b, {lkjljalksdf,jklaskfjd,kljasdlf,kljasdf,kljsdlkf,kjdd}},
-1)),
?line bt(<<"#b{f = {lkjljalksdf,jklaskfjd,kljasdlf,kljasdf,kljsdlkf,\n"
" kdd}}">>,
p({b, {lkjljalksdf,jklaskfjd,kljasdlf,kljasdf,kljsdlkf,kdd}},
-1)),
?line bt(<<"#e{f = undefined,g = undefined,\n"
" h = #e{f = 11,g = 22,h = 333}}">>,
p({e,undefined,undefined,{e,11,22,333}}, -1)),
?line bt(<<"[1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21|\n"
" apa11]">>,
p(lists:seq(1,21) ++ apa11, -1)),
?line bt(<<"[1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,\n"
" 23,\n"
" {{abadalkjlasdjflksdajfksdklfsdjlkfdlskjflsdj"
"flsdjfldsdsdddd}}]">>,
p(lists:seq(1,23) ++
[{{abadalkjlasdjflksdajfksdklfsdjlkfdlskjflsdjflsdjfldsdsdddd}}],
-1)),
?line bt(<<"{lkjasdf,\n"
" {kjkjsd,\n"
" {kjsd,\n"
" {kljsdf,\n"
" {kjlsd,{dkjsdf,{kjlds,{kljsd,{kljs,"
"{kljlkjsd}}}}}}}}}}">>,
p({lkjasdf,{kjkjsd,{kjsd,
{kljsdf,
{kjlsd,
{dkjsdf,{kjlds,
{kljsd,{kljs,{kljlkjsd}}}}}}}}}},
-1)),
?line bt(<<"{lkjasdf,\n"
" {kjkjsd,\n"
" {kjsd,{kljsdf,{kjlsd,{dkjsdf,{kjlds,"
"{kljsd,{kljs}}}}}}}}}">>,
p({lkjasdf,{kjkjsd,{kjsd,
{kljsdf,{kjlsd,{dkjsdf,
{kjlds,{kljsd,{kljs}}}}}}}}},
-1)),
?line bt(<<"<<1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,\n"
" 22,23>>">>,
p(list_to_binary(lists:seq(1,23)), -1)),
?line bt(<<"<<100,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,\n"
" 27>>">>,
p(list_to_binary([100|lists:seq(10,27)]), -1)),
?line bt(<<"<<100,101,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,\n"
" 26>>">>,
p(list_to_binary([100,101|lists:seq(10,26)]), -1)),
?line bt(<<"{{<<100,101,102,10,11,12,13,14,15,16,17,18,19,20,21,22,\n"
" 23>>}}">>,
p({{list_to_binary([100,101,102|lists:seq(10,23)])}}, -1)),
?line bt(<<"[1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22|\n"
" ap]">>,
p(lists:seq(1,22) ++ ap, -1)),
?line bt(<<"[1,2,3,4,5,6,7,8,9,10,{},[],\n <<>>,11,12,13,14,15]">>,
p(lists:seq(1,10) ++ [{},[],<<>>] ++ lists:seq(11,15),1,30,-1)),
?line bt(<<"[ddd,ddd,\n"
" {1},\n"
" [1,2],\n"
" ddd,kdfd,\n"
" [[1,2],a,b,c],\n"
" <<\"foo\">>,<<\"bar\">>,1,\n"
" {2}]">>,
p([ddd,ddd,{1},[1,2],ddd,kdfd,[[1,2],a,b,c],<<"foo">>,<<"bar">>,
1,{2}],1,50,-1)),
?line bt(<<"{dskljsadfkjsdlkjflksdjflksdjfklsdjklfjsdklfjlsdjfkl,jksd,\n"
" "
"lkjsdf,kljsdf,kljsf,kljsdf,kljsdf,jkldf,jklsdf,kljsdf,\n"
" "
"kljsdf,jklsdf,lkjfd,lkjsdf,kljsdf,kljsdf,lkjsdf,kljsdf,\n"
" "
"lkjsdfsd,kljsdf,kjsfj}">>,
p({dskljsadfkjsdlkjflksdjflksdjfklsdjklfjsdklfjlsdjfkl,jksd,
lkjsdf,kljsdf,kljsf,kljsdf,kljsdf,jkldf,jklsdf,kljsdf,
kljsdf,jklsdf,lkjfd,lkjsdf,kljsdf,kljsdf,lkjsdf,kljsdf,
lkjsdfsd,kljsdf,kjsfj}, 1, 110, -1)),
?line bt(<<"{dskljsadfkjsdlkjflksdjflksdjfklsdjklfjsdklfjlsdjfkl,"
"#d{aaaaaaaaaaaaaaaaaaaa = 1,\n"
" "
"bbbbbbbbbbbbbbbbbbbb = 2,cccccccccccccccccccc = 3,\n"
" "
"dddddddddddddddddddd = 4,eeeeeeeeeeeeeeeeeeee = 5}}">>,
rp({dskljsadfkjsdlkjflksdjflksdjfklsdjklfjsdklfjlsdjfkl,
{d,1,2,3,4,5}},1,200,-1)),
ok.
-define(ONE(N), ((1 bsl N) - 1)).
-define(ALL_ONES, ((1 bsl 52) - 1)).
otp_7084(doc) ->
["OTP-7084. Printing floating point numbers nicely."];
otp_7084(suite) ->
[];
otp_7084(Config) when is_list(Config) ->
OldDog=?config(watchdog, Config),
test_server:timetrap_cancel(OldDog),
Timeout = 180,
?line Dog = test_server:timetrap({seconds,Timeout}),
L = [{g_warm_up, fun g_warm_up/0},
{g_big_pos_float, fun g_big_pos_float/0},
{g_small_neg_float, fun g_small_neg_float/0},
{g_close_to_zero, fun g_close_to_zero/0},
{g_denormalized, fun g_denormalized/0},
{g_normalized, fun g_normalized/0},
{g_choice, fun g_choice/0},
{g_misc, fun g_misc/0}],
F = fun({M,T}) -> io:format("~p~n", [M]), T() end,
R = try
lists:foreach(fun(T) -> F(T) end, L),
ok
catch throw:Reason ->
Reason
end,
?line test_server:timetrap_cancel(Dog),
R.
g_warm_up() ->
g_t(0.5),
g_t(-0.5),
g_t((1 bsl 55) * 0.5),
g_t(-(1 bsl 55) * 0.5),
g_t(1.6799127650033296e+308),
g_t(pack(1, 0, 2#1010101010001100101000010111100101000000101100110001)),
g_t(pack(1, 0, 2#0001010000001001110100000101010101001110010001010110)),
g_t(234324324.23432432432432),
ok.
g_big_pos_float() ->
%% The greatest positive float:
ft({{0,2046,?ONE(52)}, 100, 0}),
ok.
g_small_neg_float() ->
%% The least negative float:
ft({{1,2046,?ONE(52)}, 0, 100}),
ok.
g_close_to_zero() ->
%% A few denormalized floats close to zero:
ft({{0,0,0}, 100, 100}),
g_t(pack(1, 0, 0)), % -0.0
ok.
g_denormalized() ->
%% Denormalized floats (mantissa carry):
% D = 5,
%% Faster:
D = 1,
[ft({{S,0,?ONE(N)},D,D}) || S <- [0,1], N <- lists:seq(0, 52)],
ok.
g_normalized() ->
%% Normalized floats (exponent carry):
% D = 5,
%% Faster:
D = 1,
[ft({{S,E,?ONE(52)},D,D}) || S <- [0,1], E <- lists:seq(0, 2045)],
ok.
g_choice() ->
%% Exponent should be used when and only when the string is shorter.
%% (g_misc/0 checks this too, and probably more throughly).
L = [0.0003, 3.0e-5, 3.3e-5, 3.3e-4,
314.0, 314.1, 310.0, 3.1e6, -100.0,
3.34e4, 3.0e3, 3.34333e9, 3.3433323e10, 33433323700.0,
0.00197963, 1.97963e-4],
lists:foreach(fun(V) -> g_t(V) end, L),
ok.
g_misc() ->
L_0_308 = lists:seq(0, 308),
L_0_307 = lists:seq(0, 307),
% L_1_9 = lists:seq(1, 9),
% L_0_9 = lists:seq(0, 9),
%% Faster:
L_1_9 = [1,5,9],
L_0_9 = [0,1,5,9],
%% 1.0,10.0, ... 2.0,20.0, ... 9.0,90.0, ... -1,-10, ... -2.0,-20.0...
[g_t(S*T*pow10(N)) || S <- [1.0, -1.0], T <- L_1_9, N <- L_0_307],
%% 1.0,1.0/10,1.0/100,... 2.0,2.0/10,2.0/100, ... 9.0,9.0/10,9.0/100,
%% -1.0,-1.0/10,... -9.0,-9.0/10...
[g_t(S*T/pow10(N)) || S <- [1.0, -1.0], T <- L_1_9, N <- L_0_308],
%% 0.0,1.0,2.0,...,9.0, 0.0,10.0,20.0,...,90.0,...
%% 0.0,-1.0,-2.0,...,-9.0, 0.0,-10.0,-20.0,...,-90.0,...
[g_t(S*list_to_float([D+$0]++lists:duplicate(N, $0)++".0")) ||
S <- [1.0,-1.0], N <- lists:seq(0, 300), D <- L_0_9],
%% 0.0,0.1,0.2,...0,9, 0.0,0.01,0.02,...,0.09,
%% 0.0,-0.1,-0.2,...-0,9, 0.0,-0.01,-0.02,...,-0.09,
[g_t(S*list_to_float("0."++lists:duplicate(N, $0)++[D+$0])) ||
S <- [1.0,-1.0], N <- lists:seq(0, 300), D <- L_0_9],
ok.
ft({{S,E,M}, L, G}) ->
ft({pack(S, E, M), L, G});
ft({V, Less, Greater}) when is_float(V) ->
_ = g_t(V),
ft(V, fun inc/1, Greater),
ft(V, fun dec/1, Less).
ft(V0, F, I) when I > 0, is_float(V0) ->
V = F(V0),
_ = g_t(V),
ft(V, F, I - 1);
ft(V, _F, 0) when is_float(V) ->
ok.
g_t(V) when is_float(V) ->
%% io:format("Testing ~.17g~n", [V]),
Io = io_lib:format("~p", [V]),
Sv = binary_to_list(iolist_to_binary(Io)),
ok = g_t(V, Sv),
Sv.
%% -> ok | THROW
%% Checks that Sv is the shortest, correctly rounded string that
%% converts to V when read back with list_to_float/1.
%% Note: in a few cases the least significant digit has been
%% incremented by one, namely when the correctly rounded string
%% converts to another floating point number.
g_t(0.0, "0.0") ->
ok;
g_t(V, Sv) ->
try
g_t_1(V, Sv)
catch throw:Reason ->
throw({Reason, V, Sv})
end.
g_t_1(V, Sv) ->
%% Check that the least significant digit is correct.
%% If Sv is "3.14" then Sv- is "3.13" and Sv+ is "3.15".
%% Check that |V - Sv| =< (V - Sv-) and
%% that |V - Sv| =< (Sv+ - V)
Times = least_significant_digit(Sv),
case Times of
0 -> throw(least_significant_digit_is_zero);
_ -> ok
end,
S = if V < 0 -> -1; true -> 1 end,
SvMinus = incr_lsd(Sv, -S),
SvPlus = incr_lsd(Sv, S),
Svr = s2r(Sv),
Svminusr = s2r(SvMinus),
Svplusr = s2r(SvPlus),
Vr = f2r(V),
Abs_Sv_Vr = rat_abs(rat_minus(Svr, Vr)),
Svminus_Vr = rat_minus(Vr, Svminusr),
Svplus_Vr = rat_minus(Svplusr, Vr),
%% The are 45 (negative) floats where SvMinus (SvPlus) is closer
%% to V than Sv, but such that when reading SvMinus (SvPlus) wrong
%% float would be returned.
case rat_lte(Abs_Sv_Vr, Svminus_Vr) of
true ->
ok;
false ->
case list_to_float(SvMinus) of
V -> throw(vsminus_too_close_to_v);
_Vminus -> ok
end
end,
case rat_lte(Abs_Sv_Vr, Svplus_Vr) of
true ->
ok;
false ->
case list_to_float(SvPlus) of
V -> throw(vsplus_too_close_to_v);
_Vplus -> ok
end
end,
%% Check that Sv is closer to V than to V- and V+.
%% Check that |V - Sv| =< (V - V-) and
%% that |V - Sv| =< (V+ - V)
%% (An alternative is V- + V =< 2*Sv =< V + V+.)
case inc(V) of
inf ->
ok;
Vplus ->
Vplusr = f2r(Vplus),
V_Vplusr = rat_minus(Vplusr, Vr),
case rat_lte(Abs_Sv_Vr, V_Vplusr) of
true -> ok;
false -> throw(vplus_too_close_to_sv)
end
end,
case dec(V) of
'-inf' ->
ok;
Vminus ->
Vminusr = f2r(Vminus),
V_Vminusr = rat_minus(Vr, Vminusr),
case rat_lte(Abs_Sv_Vr, V_Vminusr) of
true -> ok;
false -> throw(vminus_too_close_to_sv)
end
end,
%% Check that no prefix of Sv yields V.
%% If Sv is "3.14" then Svlow is "3.1" and Svhigh is "3.2".
%%
%% This is just one way of getting Svlow and Svhigh:
if
V < 0 ->
SvHigh = step_lsd(Sv, -Times),
SvLow = step_lsd(Sv, 10 - Times);
true ->
SvHigh = step_lsd(Sv, 10 - Times),
SvLow = step_lsd(Sv, -Times)
end,
case catch list_to_float(SvLow) of
V -> throw(low_is_v);
_ -> ok
end,
case catch list_to_float(SvHigh) of
V -> throw(high_is_v);
_ -> ok
end,
%% Check that Sv has enough digits.
case list_to_float(Sv) of
V -> ok;
_ -> throw(wrong_float) % cannot happen
end,
g_choice(Sv),
ok.
%%% In "123450000.0", '5' is the lsd;
%%% in "1234.0000", (the last) '0' is the lsd;
%%% in "1234.0", '4' is the lsd (the Erlang syntax requires the final zero).
%% Trailing zeroes are not significant ("3.0", "5.0e-324", "232000.0").
least_significant_digit("-"++Ds) ->
least_significant_digit(Ds);
least_significant_digit("+"++Ds) ->
least_significant_digit(Ds);
least_significant_digit(Ds) ->
[MS|_E] = string:tokens(Ds, "eE"),
lsd0(lists:reverse(MS))-$0.
lsd0("0."++Ds) ->
lsd1(Ds);
lsd0([D | _Ds]) ->
D.
lsd1("0"++Ds) ->
lsd1(Ds);
lsd1([D | _Ds]) ->
D.
step_lsd(Ds, 0) ->
Ds;
step_lsd(Ds, N) when N > 0 ->
NDs = incr_lsd(Ds, 1),
step_lsd(NDs, N - 1);
step_lsd(Ds, N) when N < 0 ->
NDs = incr_lsd(Ds, -1),
step_lsd(NDs, N + 1).
%% Assumes Ds represents some other number than zero.
%% Increments or decrements the least significant digit.
incr_lsd("-"++Ds, I) ->
"-"++incr_lsd(Ds, I);
incr_lsd(Ds, I) when I =:= 1; I =:= -1 ->
[MS|E] = string:tokens(Ds, "eE"),
X = ["e" || true <- [E =/= []]],
lists:flatten([incr_lsd0(lists:reverse(MS), I, []), X, E]).
incr_lsd0("0."++Ds, C, L) ->
incr_lsd1(Ds, C, [$., $0 | L]);
incr_lsd0(Ds, C, L) ->
incr_lsd2(Ds, C, L).
incr_lsd1("0"++Ds, C, L) ->
incr_lsd1(Ds, C, [$0 | L]);
incr_lsd1(Ds, C, L) ->
incr_lsd2(Ds, C, L).
incr_lsd2([], C, L) ->
[C + $0 | L];
incr_lsd2("."++Ds, C, L) ->
incr_lsd2(Ds, C, [$. | L]);
incr_lsd2("9"++Ds, 1=C, L) ->
incr_lsd2(Ds, C, [$0 | L]);
incr_lsd2("0"++Ds, -1=C, L) ->
incr_lsd2(Ds, C, [$9 | L]);
incr_lsd2([D | Ds], C, L) ->
lists:reverse(Ds, [D + C | L]).
s2r(S) when is_list(S) ->
case string:tokens(S, "eE") of
[MS] ->
s10(MS);
[MS, ES] ->
Mr = s10(MS),
E = list_to_integer(ES),
if
E < 0 ->
rat_multiply(Mr, {1,pow10(-E)});
true ->
rat_multiply(Mr, {pow10(E), 1})
end
end.
s10("-"++S) ->
rat_multiply({-1,1},s10(S));
s10(S) ->
[AS, BS] = string:tokens(S, "."),
Sc = length(BS),
A = list_to_integer(AS),
B = list_to_integer(BS),
F = pow10(Sc),
rat_multiply({1,1}, {A*F + B, F}).
pow10(X) ->
int_pow(10, X).
int_pow(X, 0) when is_integer(X) ->
1;
int_pow(X, N) when is_integer(X), is_integer(N), N > 0 ->
int_pow(X, N, 1).
int_pow(X, N, R) when N < 2 ->
R * X;
int_pow(X, N, R) ->
int_pow(X * X, N bsr 1, case N band 1 of 1 -> R * X; 0 -> R end).
dec(F) when is_float(F) ->
<<S:1, BE:11, M:52>> = <<F:64/float>>,
dec({S,BE,M});
dec({1,2046,?ALL_ONES}) ->
'-inf';
dec({S,BE,M}) when 0 =< S, S =< 1,
0 =< BE, BE =< 2046,
0 =< M, M =< ?ALL_ONES ->
{S1,BE1,M1} = dec1(S, BE, M),
<<F:64/float>> = <<S:1, BE:11, M:52>>,
<<F1:64/float>> = <<S1:1, BE1:11, M1:52>>,
true = F1 < F,
F1.
dec1(0, 0, 0) ->
dec1(1, 0, 0);
dec1(0, BE, 0) ->
{0,BE-1,?ALL_ONES};
dec1(0, BE, M) ->
{0,BE,M-1};
dec1(1, BE, ?ALL_ONES) ->
{1,BE+1,0};
dec1(1, BE, M) ->
{1,BE,M+1}.
inc(F) when is_float(F) ->
<<S:1, BE:11, M:52>> = <<F:64/float>>,
inc({S,BE,M});
inc({0,2046,?ALL_ONES}) ->
inf;
inc({S,BE,M}) when 0 =< S, S =< 1,
0 =< BE, BE =< 2046,
0 =< M, M =< ?ALL_ONES ->
{S1,BE1,M1} = inc1(S, BE, M),
<<F:64/float>> = <<S:1, BE:11, M:52>>,
<<F1:64/float>> = <<S1:1, BE1:11, M1:52>>,
true = F1 > F,
F1.
inc1(0, BE, ?ALL_ONES) ->
{0,BE+1,0};
inc1(0, BE, M) ->
{0,BE,M+1};
inc1(1, 0, 0) ->
inc1(0, 0, 0);
inc1(1, BE, 0) ->
{1,BE-1,?ALL_ONES};
inc1(1, BE, M) ->
{1,BE,M-1}.
f2r(F) when is_float(F) ->
<<S:1, BE:11, M:52>> = <<F:64/float>>,
f2r({S,BE,M});
f2r({S,BE,M}) when 0 =< S, S =< 1,
0 =< BE, BE =< 2046,
0 =< M, M =< ?ALL_ONES ->
Vr = {T,N} = f2r1(S, BE, M),
<<F:64/float>> = <<S:1, BE:11, M:52>>,
case catch T/N of
{'EXIT', _} -> ok;
TN -> true = F =:= TN
end,
Vr.
f2r1(S, 0, M) ->
rat_multiply({sign(S),1}, {M, 1 bsl 1074});
f2r1(S, BE, M) when BE - 1075 >= 0 ->
rat_multiply({sign(S),1}, {((1 bsl 52)+M) * (1 bsl (BE-1075)),1});
f2r1(S, BE, M) ->
rat_multiply({sign(S),1}, {(1 bsl 52)+M, 1 bsl (1075-BE)}).
sign(0) ->
1;
sign(1) ->
-1.
%%% Rational numbers (very scetchy).
rat_abs({A,B}) when A < 0 ->
{-A,B};
rat_abs({A,B}) ->
{A,B}.
-ifdef(not_used).
rat_equal(R1, R2) ->
R1 =:= R2.
rat_negate({A,B}) ->
{-A,B}.
rat_divide({A,B},{C,D}) ->
rat_multiply({A,B},{D,C}).
-endif.
rat_lte({A,B}, {C,D}) when B =/= 0, D =/= 0 ->
A*D =< C*B.
rat_minus({A,B}, {C,D}) ->
rat_plus({A,B}, {-C,D}).
rat_plus({A,B}, {C,D}) when B =/= 0, D =/= 0 ->
rat_normalize({A*D+B*C, B*D}).
rat_multiply({A,B}, {C,D}) when B =/= 0, D =/= 0 ->
rat_normalize({A * C, B * D}).
rat_normalize({T,N}) when N =/= 0 ->
G = gcd(T, N),
T2 = T div G,
N2 = N div G,
if
T2 < 0 ->
if
N2 < 0 -> {-T2,-N2};
true -> {T2,N2}
end;
true ->
if
N2 < 0 -> {-T2,-N2};
true -> {T2,N2}
end
end.
gcd(A, 0) -> A;
gcd(A, B) -> gcd(B, A rem B).
%%% End of rational numbers.
%% Check that there is an exponent if and only if characters are
%% saved. Note: this assumes floating point numbers "Erlang style"
%% (with a single zero before and after the dot, and no extra leading
%% zero in the exponent).
g_choice(S) when is_list(S) ->
[MS | ES0] = string:tokens(S, "eE"),
[IS, FS] = string:tokens(MS, "."),
Il = length(IS),
Fl = length(FS),
Pre = z(MS),
Post = z(lists:reverse(MS)),
ES = lists:append(ES0),
El = length(ES),
I = list_to_integer(IS),
if
El =/= 0, ((I > 9) or (I < -9)) ->
throw(too_many_digits_before_the_dot);
El =/= 0, I =:= 0 ->
throw(zero_before_the_dot);
Pre =:= 0, Post > 0, El =:= 0 -> % DDDD0000.0
Saving = if
I < 0, Il =:= Post + 2 ->
Post;
I > 0, Il =:= Post + 1 ->
Post;
I =/= 0, true ->
Post + 1
end,
Cost = 1 + length(integer_to_list(Il - 1)),
if
Cost < Saving ->
throw(with_exponent_is_shorter);
true ->
ok
end;
Pre > 0, Post =:= 0, El =:= 0 -> % 0.000DDDD
Saving = if
Fl =:= Pre + 1 ->
Pre;
true ->
Pre + 1
end,
Cost = 2 + length(integer_to_list(Pre + 1)),
if
Cost < Saving ->
throw(with_exponent_is_shorter);
true ->
ok
end;
Pre =:= 0, Post =:= 0, El > 0 -> % D.DDDeDD
E = list_to_integer(ES),
if
E >= 0 ->
Cost = E - (Fl - 1);
E < 0 ->
Cost = -E
end,
Saving = length(ES) + 1,
if
Cost =:= Saving ->
throw(draw_but_choose_form_without_exponent);
Cost < Saving ->
throw(without_exponent_is_shorter);
true ->
ok
end;
Pre =:= 0, Post =:= 0, El =:= 0 -> % DDD.DDD
ok;
true ->
throw(badly_formed_floating_point_string)
end.
z("0."++Ds) ->
length(lists:takewhile(fun(D) -> D =:= $0 end, Ds));
z(_Ds) ->
0.
pack(Sign, Exp, Frac) ->
<<Float:64/float>> = <<Sign:1, Exp:11, Frac:52>>,
Float.
%% Whitebox test of io_lib:collect_line/3.
io_lib_collect_line_3_wb(Config) when is_list(Config) ->
?line do_collect_line(binary, "\n"),
?line do_collect_line(binary, "\r\n"),
?line do_collect_line(list, "\n"),
?line do_collect_line(list, "\r\n"),
ok.
do_collect_line(Mode, Eol) ->
First = "abcde",
FirstNL = First++"\n",
Second = "unterminated line",
Data0 = First ++ Eol ++ Second,
{Data1,Result0} = do_collect_line_combine(Mode, Data0, FirstNL, Second),
do_collect_line_1(Mode, Data1, Result0, []),
{Data,Result} = do_collect_line_combine(Mode, "unterm", "unterm", eof),
do_collect_line_1(Mode, Data, Result, []).
do_collect_line_combine(binary, Data0, FirstNL, eof) ->
{list_to_binary(Data0),
{stop,list_to_binary(FirstNL),eof}};
do_collect_line_combine(binary, Data0, FirstNL, Second) ->
{list_to_binary(Data0),
{stop,list_to_binary(FirstNL),list_to_binary(Second)}};
do_collect_line_combine(list, Data0, FirstNL, Second) ->
{Data0,{stop,FirstNL,Second}}.
do_collect_line_1(Mode, [H|T], Result, Acc0) ->
Acc = [H|Acc0],
Result = do_collect_line_2(lists:reverse(Acc), T),
do_collect_line_1(Mode, T, Result, Acc);
do_collect_line_1(Mode, <<H,T/binary>>, Result, Acc0) ->
Acc = [H|Acc0],
Result = do_collect_line_2(list_to_binary(lists:reverse(Acc)), T),
do_collect_line_1(Mode, T, Result, Acc);
do_collect_line_1(_Mode, [], _Result, _Acc) ->
ok;
do_collect_line_1(_Mode, <<>>, _Result, _Acc) ->
ok.
do_collect_line_2(Part1, Part2) ->
Dummy = make_ref(),
do_collect_line_3(start, [Part1,Part2,eof], Dummy).
do_collect_line_3(State0, [H|T], Dummy) ->
case io_lib:collect_line(State0, H, Dummy) of
{stop,Line,Rest} ->
{stop,Line,do_collect_line_adjust_rest(Rest, T)};
State ->
do_collect_line_3(State, T, Dummy)
end.
do_collect_line_adjust_rest(eof, []) -> eof;
do_collect_line_adjust_rest(eof, <<>>) -> eof;
do_collect_line_adjust_rest(Rest, [eof]) -> Rest;
do_collect_line_adjust_rest(Rest, [Bin|T]) when is_binary(Bin) ->
do_collect_line_adjust_rest(<<Rest/binary,Bin/binary>>, T);
do_collect_line_adjust_rest(Rest, [List|T]) when is_list(List) ->
do_collect_line_adjust_rest(Rest++List, T).
cr_whitespace_in_string(Config) when is_list(Config) ->
?line {ok,["abc"],[]} = io_lib:fread("~s", "\rabc").
io_fread_newlines(Config) when is_list(Config) ->
?line PrivDir = ?privdir(Config),
?line Fname = filename:join(PrivDir, "io_fread_newlines.txt"),
?line F0 = [[0,1,2,3,4,5,6,7,8,9]],
?line F1 = [[0,1,2,3,4,5,6,7,8],[9]],
?line F2 = [[0,1,2,3,4,5,6,7],[8,9]],
?line F3 = [[0,1,2,3,4,5,6],[7,8,9]],
?line F4 = [[0,1,2,3,4,5],[6,7,8,9]],
?line F5 = [[0,1,2,3,4],[5,6,7,8,9]],
?line F6 = [[0,1,2,3],[4,5,6,7],[8,9]],
?line F7 = [[0,1,2],[3,4,5],[6,7,8],[9]],
?line F8 = [[0,1],[2,3],[4,5],[6,7],[8,9]],
?line F9 = [[0],[1],[2],[3],[4],[5],[6],[7],[8],[9]],
?line Newlines = ["\n", "\r\n", "\r"],
try
?line io_fread_newlines_1([F0,F1,F2,F3,F4,F5,F6,F7,F8,F9],
Fname, Newlines)
after
file:delete(Fname)
end.
io_fread_newlines_1(Fs, Fname, [Newline|Newlines]) ->
?line ok = io_fread_newlines_2(Fs, Fname, Newline),
?line io_fread_newlines_1(Fs, Fname, Newlines);
io_fread_newlines_1(_, _, []) -> ok.
io_fread_newlines_2([F|Fs], Fname, Newline) ->
?line N1 = write_newlines_file(Fname, F, Newline),
?line {F2,N2} = read_newlines_file(Fname),
?line io:format("~w ~p ~w~n~n", [N1,F,N2]),
?line F2 = lists:flatten(F),
%% Intermediate newlines are not counted
?line N2 = N1 - (length(F) - 1)*length(Newline),
?line io_fread_newlines_2(Fs, Fname, Newline);
io_fread_newlines_2([], _, _) -> ok.
write_newlines_file(Fname, F, Newline) ->
Bytes = list_to_binary(digit_lines(F, Newline)),
io:format("Data: ~w~n~w~n", [Newline,Bytes]),
ok = file:write_file(Fname, Bytes),
size(Bytes).
digit_lines([L], _) ->
digit_line(L);
digit_lines([L|Ls], Newline) ->
[digit_line(L),Newline|digit_lines(Ls, Newline)].
digit_line([D]) ->
integer_to_list(D);
digit_line([D|Ds]) ->
[integer_to_list(D), " ", digit_line(Ds)].
read_newlines_file(Fname) ->
{ok,Fd} = file:open(Fname, [read]),
try {L, N0} = R0 = read_newlines(Fd, [], 0),
case io:fread(Fd, "", "~*s~l") of
eof -> R0;
{ok,[N]} -> {L,N0+N}
end
after
file:close(Fd)
end.
read_newlines(Fd, Acc, N0) ->
case io:fread(Fd, "", "~d~l") of
{ok,[D,N]} ->
read_newlines(Fd, [D|Acc], N0+N);
eof ->
{lists:reverse(Acc),N0}
end.
otp_8989(doc) ->
"OTP-8989 io:format for ~F.Ps ignores P in some cases";
otp_8989(Suite) when is_list(Suite) ->
Hello = "Hello",
?line " Hello" = fmt("~6.6s", [Hello]),
?line " Hello" = fmt("~*.6s", [6,Hello]),
?line " Hello" = fmt("~6.*s", [6,Hello]),
?line " Hello" = fmt("~*.*s", [6,6,Hello]),
%%
?line " Hello" = fmt("~6.5s", [Hello]),
?line " Hello" = fmt("~*.5s", [6,Hello]),
?line " Hello" = fmt("~6.*s", [5,Hello]),
?line " Hello" = fmt("~*.*s", [6,5,Hello]),
%%
?line " Hell" = fmt("~6.4s", [Hello]),
?line " Hell" = fmt("~*.4s", [6,Hello]),
?line " Hell" = fmt("~6.*s", [4,Hello]),
?line " Hell" = fmt("~*.*s", [6,4,Hello]),
%%
?line "Hello" = fmt("~5.5s", [Hello]),
?line "Hello" = fmt("~*.5s", [5,Hello]),
?line "Hello" = fmt("~5.*s", [5,Hello]),
?line "Hello" = fmt("~*.*s", [5,5,Hello]),
%%
?line " Hell" = fmt("~5.4s", [Hello]),
?line " Hell" = fmt("~*.4s", [5,Hello]),
?line " Hell" = fmt("~5.*s", [4,Hello]),
?line " Hell" = fmt("~*.*s", [5,4,Hello]),
%%
?line "Hell" = fmt("~4.4s", [Hello]),
?line "Hell" = fmt("~*.4s", [4,Hello]),
?line "Hell" = fmt("~4.*s", [4,Hello]),
?line "Hell" = fmt("~*.*s", [4,4,Hello]),
%%
?line " Hel" = fmt("~4.3s", [Hello]),
?line " Hel" = fmt("~*.3s", [4,Hello]),
?line " Hel" = fmt("~4.*s", [3,Hello]),
?line " Hel" = fmt("~*.*s", [4,3,Hello]),
%%
%%
?line "Hello " = fmt("~-6.6s", [Hello]),
?line "Hello " = fmt("~*.6s", [-6,Hello]),
?line "Hello " = fmt("~-6.*s", [6,Hello]),
?line "Hello " = fmt("~*.*s", [-6,6,Hello]),
%%
?line "Hello " = fmt("~-6.5s", [Hello]),
?line "Hello " = fmt("~*.5s", [-6,Hello]),
?line "Hello " = fmt("~-6.*s", [5,Hello]),
?line "Hello " = fmt("~*.*s", [-6,5,Hello]),
%%
?line "Hell " = fmt("~-6.4s", [Hello]),
?line "Hell " = fmt("~*.4s", [-6,Hello]),
?line "Hell " = fmt("~-6.*s", [4,Hello]),
?line "Hell " = fmt("~*.*s", [-6,4,Hello]),
%%
?line "Hello" = fmt("~-5.5s", [Hello]),
?line "Hello" = fmt("~*.5s", [-5,Hello]),
?line "Hello" = fmt("~-5.*s", [5,Hello]),
?line "Hello" = fmt("~*.*s", [-5,5,Hello]),
%%
?line "Hell " = fmt("~-5.4s", [Hello]),
?line "Hell " = fmt("~*.4s", [-5,Hello]),
?line "Hell " = fmt("~-5.*s", [4,Hello]),
?line "Hell " = fmt("~*.*s", [-5,4,Hello]),
%%
?line "Hell" = fmt("~-4.4s", [Hello]),
?line "Hell" = fmt("~*.4s", [-4,Hello]),
?line "Hell" = fmt("~-4.*s", [4,Hello]),
?line "Hell" = fmt("~*.*s", [-4,4,Hello]),
%%
?line "Hel " = fmt("~-4.3s", [Hello]),
?line "Hel " = fmt("~*.3s", [-4,Hello]),
?line "Hel " = fmt("~-4.*s", [3,Hello]),
?line "Hel " = fmt("~*.*s", [-4,3,Hello]),
ok.
io_lib_fread_literal(doc) ->
"OTP-9439 io_lib:fread bug for literate at end";
io_lib_fread_literal(Suite) when is_list(Suite) ->
?line {more,"~d",0,""} = io_lib:fread("~d", ""),
?line {error,{fread,integer}} = io_lib:fread("~d", " "),
?line {more,"~d",1,""} = io_lib:fread(" ~d", " "),
?line {ok,[17],"X"} = io_lib:fread(" ~d", " 17X"),
%%
?line {more,"d",0,""} = io_lib:fread("d", ""),
?line {error,{fread,input}} = io_lib:fread("d", " "),
?line {more,"d",1,""} = io_lib:fread(" d", " "),
?line {ok,[],"X"} = io_lib:fread(" d", " dX"),
%%
?line {done,eof,_} = io_lib:fread([], eof, "~d"),
?line {done,eof,_} = io_lib:fread([], eof, " ~d"),
?line {more,C1} = io_lib:fread([], " \n", " ~d"),
?line {done,{error,{fread,input}},_} = io_lib:fread(C1, eof, " ~d"),
?line {done,{ok,[18]},""} = io_lib:fread(C1, "18\n", " ~d"),
%%
?line {done,eof,_} = io_lib:fread([], eof, "d"),
?line {done,eof,_} = io_lib:fread([], eof, " d"),
?line {more,C2} = io_lib:fread([], " \n", " d"),
?line {done,{error,{fread,input}},_} = io_lib:fread(C2, eof, " d"),
?line {done,{ok,[]},[]} = io_lib:fread(C2, "d\n", " d"),
ok.
io_lib_print_binary_depth_one(doc) ->
"Test binaries printed with a depth of one behave correctly";
io_lib_print_binary_depth_one(Suite) when is_list(Suite) ->
?line "<<>>" = fmt("~W", [<<>>, 1]),
?line "<<>>" = fmt("~P", [<<>>, 1]),
?line "<<...>>" = fmt("~W", [<<1>>, 1]),
?line "<<...>>" = fmt("~P", [<<1>>, 1]),
?line "<<...>>" = fmt("~W", [<<1:7>>, 1]),
?line "<<...>>" = fmt("~P", [<<1:7>>, 1]),
ok.
otp_10302(doc) ->
"OTP-10302. Unicode";
otp_10302(Suite) when is_list(Suite) ->
"\"\x{400}\"" = pretty("\x{400}", -1),
"<<\"\x{400}\"/utf8>>" = pretty(<<"\x{400}"/utf8>>, -1),
"<<\"\x{400}foo\"/utf8>>" = pretty(<<"\x{400}foo"/utf8>>, 2),
"<<\"äppl\"/utf8>>" = pretty(<<"äppl"/utf8>>, 2),
"<<\"äppl\"/utf8...>>" = pretty(<<"äpple"/utf8>>, 2),
"<<\"apel\">>" = pretty(<<"apel">>, 2),
"<<\"apel\"...>>" = pretty(<<"apelsin">>, 2),
"<<228,112,112,108>>" = fmt("~tp", [<<"äppl">>]),
"<<228,...>>" = fmt("~tP", [<<"äppl">>, 2]),
"<<0,0,0,0,0,0,1,0>>" = fmt("~p", [<<256:64/unsigned-integer>>]),
"<<0,0,0,0,0,0,1,0>>" = fmt("~tp", [<<256:64/unsigned-integer>>]),
Chars = lists:seq(0, 512), % just a few...
[] = [C || C <- Chars, S <- io_lib:write_char_as_latin1(C),
not is_latin1(S)],
L1 = [S || C <- Chars, S <- io_lib:write_char(C),
not is_latin1(S)],
L1 = lists:seq(256, 512),
[] = [C || C <- Chars, S <- io_lib:write_string_as_latin1([C]),
not is_latin1(S)],
L2 = [S || C <- Chars, S <- io_lib:write_string([C]),
not is_latin1(S)],
L2 = lists:seq(256, 512),
ok.
pretty(Term, Depth) when is_integer(Depth) ->
Opts = [{column, 1}, {line_length, 20},
{depth, Depth}, {max_chars, 60},
{encoding, unicode}],
pretty(Term, Opts);
pretty(Term, Opts) when is_list(Opts) ->
R = io_lib_pretty:print(Term, Opts),
lists:flatten(io_lib:format("~ts", [R])).
is_latin1(S) ->
S >= 0 andalso S =< 255.
otp_10836(doc) ->
"OTP-10836. ~ts extended to latin1";
otp_10836(Suite) when is_list(Suite) ->
S = io_lib:format("~ts", [[<<"äpple"/utf8>>, <<"äpple">>]]),
"äppleäpple" = lists:flatten(S),
ok.
