%%
%% %CopyrightBegin%
%%
%% Copyright Ericsson AB 1998-2010. 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(erl_scan_SUITE).
-export([all/1]).
-export([error/1, error_1/1, error_2/1, iso88591/1, otp_7810/1]).
-import(lists, [nth/2,flatten/1]).
-import(io_lib, [print/1]).
%%
%% Define to run outside of test server
%%
%-define(STANDALONE,1).
-ifdef(STANDALONE).
-compile(export_all).
-define(line, put(line, ?LINE), ).
-define(config(A,B),config(A,B)).
-define(t, test_server).
%% config(priv_dir, _) ->
%% ".";
%% config(data_dir, _) ->
%% ".".
-else.
-include("test_server.hrl").
-export([init_per_testcase/2, fin_per_testcase/2]).
init_per_testcase(_Case, Config) when is_list(Config) ->
?line Dog=test_server:timetrap(test_server:seconds(1200)),
[{watchdog, Dog}|Config].
fin_per_testcase(_Case, Config) ->
Dog=?config(watchdog, Config),
test_server:timetrap_cancel(Dog),
ok.
-endif.
% Default timetrap timeout (set in init_per_testcase).
-define(default_timeout, ?t:minutes(1)).
all(doc) ->
["Test cases for the 'erl_scan' module."];
all(suite) ->
[error,iso88591,otp_7810].
error(doc) ->
["Error cases"];
error(suite) ->
[error_1, error_2].
error_1(doc) ->
["(OTP-2347)"];
error_1(suite) ->
[];
error_1(Config) when is_list(Config) ->
?line {error, _, _} = erl_scan:string("'a"),
ok.
error_2(doc) ->
["Checks that format_error works on the error cases."];
error_2(suite) ->
[];
error_2(Config) when is_list(Config) ->
?line lists:foreach(fun check/1, error_cases()),
ok.
error_cases() ->
["'a",
"\"a",
"'\\",
"\"\\",
"$",
"$\\",
"2.3e",
"2.3e-",
"91#9"
].
assert_type(N, integer) when is_integer(N) ->
ok;
assert_type(N, atom) when is_atom(N) ->
ok.
check(String) ->
Error = erl_scan:string(String),
check_error(Error, erl_scan).
%%% (This should be useful for all format_error functions.)
check_error({error, Info, EndLine}, Module0) ->
?line {ErrorLine, Module, Desc} = Info,
?line true = (Module == Module0),
?line assert_type(EndLine, integer),
?line assert_type(ErrorLine, integer),
?line true = (ErrorLine =< EndLine),
?line String = lists:flatten(Module0:format_error(Desc)),
?line true = io_lib:printable_list(String).
iso88591(doc) -> ["Tests the support for ISO-8859-1 i.e Latin-1"];
iso88591(suite) -> [];
iso88591(Config) when is_list(Config) ->
?line ok =
case catch begin
%% Some atom and variable names
V1s = [$�,$�,$�,$�],
V2s = [$N,$�,$r],
A1s = [$h,$�,$r],
A2s = [$�,$r,$e],
%% Test parsing atom and variable characters.
{ok,Ts1,_} = erl_scan:string(V1s ++ " " ++ V2s ++
"\327" ++
A1s ++ " " ++ A2s),
V1s = atom_to_list(element(3, nth(1, Ts1))),
V2s = atom_to_list(element(3, nth(2, Ts1))),
A1s = atom_to_list(element(3, nth(4, Ts1))),
A2s = atom_to_list(element(3, nth(5, Ts1))),
%% Test printing atoms
A1s = flatten(print(element(3, nth(4, Ts1)))),
A2s = flatten(print(element(3, nth(5, Ts1)))),
%% Test parsing and printing strings.
S1 = V1s ++ "\327" ++ A1s ++ "\250" ++ A2s,
S1s = "\"" ++ S1 ++ "\"",
{ok,Ts2,_} = erl_scan:string(S1s),
S1 = element(3, nth(1, Ts2)),
S1s = flatten(print(element(3, nth(1, Ts2)))),
ok %It all worked
end of
{'EXIT',R} -> %Something went wrong!
{error,R};
ok -> ok %Aok
end.
otp_7810(doc) ->
["OTP-7810. White spaces, comments, and more.."];
otp_7810(suite) ->
[];
otp_7810(Config) when is_list(Config) ->
?line ok = reserved_words(),
?line ok = atoms(),
?line ok = punctuations(),
?line ok = comments(),
?line ok = errors(),
?line ok = integers(),
?line ok = base_integers(),
?line ok = floats(),
?line ok = dots(),
?line ok = chars(),
?line ok = variables(),
?line ok = eof(),
?line ok = illegal(),
?line ok = crashes(),
?line ok = options(),
?line ok = token_info(),
?line ok = column_errors(),
?line ok = white_spaces(),
?line ok = unicode(),
?line ok = more_chars(),
?line ok = more_options(),
?line ok = attributes_info(),
?line ok = set_attribute(),
ok.
reserved_words() ->
L = ['after', 'begin', 'case', 'try', 'cond', 'catch',
'andalso', 'orelse', 'end', 'fun', 'if', 'let', 'of',
'query', 'receive', 'when', 'bnot', 'not', 'div',
'rem', 'band', 'and', 'bor', 'bxor', 'bsl', 'bsr',
'or', 'xor'] ,
[begin
?line {RW, true} = {RW, erl_scan:reserved_word(RW)},
S = atom_to_list(RW),
Ts = [{RW,1}],
?line test_string(S, Ts)
end || RW <- L],
ok.
atoms() ->
?line test_string("a
b", [{atom,1,a},{atom,2,b}]),
?line test_string("'a b'", [{atom,1,'a b'}]),
?line test_string("a", [{atom,1,a}]),
?line test_string("a@2", [{atom,1,a@2}]),
?line test_string([39,65,200,39], [{atom,1,'A�'}]),
?line test_string("�rlig �sten", [{atom,1,�rlig},{atom,1,�sten}]),
?line {ok,[{atom,_,'$a'}],{1,6}} =
erl_scan:string("'$\\a'", {1,1}),
?line test("'$\\a'"),
ok.
punctuations() ->
L = ["<<", "<-", "<=", "<", ">>", ">=", ">", "->", "--",
"-", "++", "+", "=:=", "=/=", "=<", "==", "=", "/=",
"/", "||", "|", ":-", "::", ":"],
%% One token at a time:
[begin
W = list_to_atom(S),
Ts = [{W,1}],
?line test_string(S, Ts)
end || S <- L],
Three = ["/=:=", "<=:=", "==:=", ">=:="], % three tokens...
No = Three ++ L,
SL0 = [{S1++S2,{-length(S1),S1,S2}} ||
S1 <- L,
S2 <- L,
not lists:member(S1++S2, No)],
SL = family_list(SL0),
%% Two tokens. When there are several answers, the one with
%% the longest first token is chosen:
%% [the special case "=<<" is among the tested ones]
[begin
W1 = list_to_atom(S1),
W2 = list_to_atom(S2),
Ts = [{W1,1},{W2,1}],
?line test_string(S, Ts)
end || {S,[{_,S1,S2}|_]} <- SL],
PTs1 = [{'!',1},{'(',1},{')',1},{',',1},{';',1},{'=',1},{'[',1},
{']',1},{'{',1},{'|',1},{'}',1}],
?line test_string("!(),;=[]{|}", PTs1),
PTs2 = [{'#',1},{'&',1},{'*',1},{'+',1},{'/',1},
{':',1},{'<',1},{'>',1},{'?',1},{'@',1},
{'\\',1},{'^',1},{'`',1},{'~',1}],
?line test_string("#&*+/:<>?@\\^`~", PTs2),
ok.
comments() ->
?line test("a %%\n b"),
?line {ok,[],1} = erl_scan:string("%"),
?line test("a %%\n b"),
?line {ok,[{atom,_,a},{atom,_,b}],{2,3}} =
erl_scan:string("a %%\n b",{1,1}),
?line {ok,[{atom,_,a},{comment,_,"%%"},{atom,_,b}],{2,3}} =
erl_scan:string("a %%\n b",{1,1}, [return_comments]),
?line {ok,[{atom,_,a},
{white_space,_," "},
{white_space,_,"\n "},
{atom,_,b}],
{2,3}} =
erl_scan:string("a %%\n b",{1,1},[return_white_spaces]),
?line {ok,[{atom,_,a},
{white_space,_," "},
{comment,_,"%%"},
{white_space,_,"\n "},
{atom,_,b}],
{2,3}} = erl_scan:string("a %%\n b",{1,1},[return]),
ok.
errors() ->
?line {error,{1,erl_scan,{string,$',"qa"}},1} = erl_scan:string("'qa"), %'
?line {error,{1,erl_scan,{string,$","str"}},1} = %"
erl_scan:string("\"str"), %"
?line {error,{1,erl_scan,char},1} = erl_scan:string("$"),
?line test_string([34,65,200,34], [{string,1,"A�"}]),
?line test_string("\\", [{'\\',1}]),
?line {'EXIT',_} =
(catch {foo, erl_scan:string('$\\a', {1,1})}), % type error
?line {'EXIT',_} =
(catch {foo, erl_scan:tokens([], '$\\a', {1,1})}), % type error
?line "{a,tuple}" = erl_scan:format_error({a,tuple}),
ok.
integers() ->
[begin
I = list_to_integer(S),
Ts = [{integer,1,I}],
?line test_string(S, Ts)
end || S <- [[N] || N <- lists:seq($0, $9)] ++ ["2323","000"] ],
ok.
base_integers() ->
[begin
B = list_to_integer(BS),
I = erlang:list_to_integer(S, B),
Ts = [{integer,1,I}],
?line test_string(BS++"#"++S, Ts)
end || {BS,S} <- [{"2","11"}, {"5","23234"}, {"12","05a"},
{"16","abcdef"}, {"16","ABCDEF"}] ],
?line {error,{1,erl_scan,{base,1}},1} = erl_scan:string("1#000"),
?line test_string("12#bc", [{integer,1,11},{atom,1,c}]),
[begin
Str = BS ++ "#" ++ S,
?line {error,{1,erl_scan,{illegal,integer}},1} =
erl_scan:string(Str)
end || {BS,S} <- [{"3","3"},{"15","f"}, {"12","c"}] ],
?line {ok,[{integer,1,239},{'@',1}],1} = erl_scan:string("16#ef@"),
?line {ok,[{integer,1,14},{atom,1,g@}],1} = erl_scan:string("16#eg@"),
ok.
floats() ->
[begin
F = list_to_float(FS),
Ts = [{float,1,F}],
?line test_string(FS, Ts)
end || FS <- ["1.0","001.17","3.31200","1.0e0","1.0E17",
"34.21E-18", "17.0E+14"]],
?line test_string("1.e2", [{integer,1,1},{'.',1},{atom,1,e2}]),
?line {error,{1,erl_scan,{illegal,float}},1} =
erl_scan:string("1.0e400"),
[begin
?line {error,{1,erl_scan,{illegal,float}},1} = erl_scan:string(S)
end || S <- ["1.14Ea"]],
ok.
dots() ->
Dot = [{".", {ok,[{dot,1}],1}},
{". ", {ok,[{dot,1}],1}},
{".\n", {ok,[{dot,1}],2}},
{".%", {ok,[{dot,1}],1}},
{".\210",{ok,[{dot,1}],1}},
{".% �h",{ok,[{dot,1}],1}},
{".%\n", {ok,[{dot,1}],2}},
{".$", {error,{1,erl_scan,char},1}},
{".$\\", {error,{1,erl_scan,char},1}},
{".a", {ok,[{'.',1},{atom,1,a}],1}}
],
?line [R = erl_scan:string(S) || {S, R} <- Dot],
?line {ok,[{dot,_}=T1],{1,2}} = erl_scan:string(".", {1,1}, text),
?line [{column,1},{length,1},{line,1},{text,"."}] =
erl_scan:token_info(T1, [column, length, line, text]),
?line {ok,[{dot,_}=T2],{1,3}} = erl_scan:string(".%", {1,1}, text),
?line [{column,1},{length,1},{line,1},{text,"."}] =
erl_scan:token_info(T2, [column, length, line, text]),
?line {ok,[{dot,_}=T3],{1,6}} =
erl_scan:string(".% �h", {1,1}, text),
?line [{column,1},{length,1},{line,1},{text,"."}] =
erl_scan:token_info(T3, [column, length, line, text]),
?line {error,{{1,2},erl_scan,char},{1,3}} =
erl_scan:string(".$", {1,1}),
?line {error,{{1,2},erl_scan,char},{1,4}} =
erl_scan:string(".$\\", {1,1}),
?line test(". "),
?line test(". "),
?line test(".\n"),
?line test(".\n\n"),
?line test(".\n\r"),
?line test(".\n\n\n"),
?line test(".\210"),
?line test(".%\n"),
?line test(".a"),
?line test("%. \n. "),
?line {more,C} = erl_scan:tokens([], "%. ",{1,1}, return),
?line {done,{ok,[{comment,_,"%. "},
{white_space,_,"\n"},
{dot,_}],
{2,3}}, ""} =
erl_scan:tokens(C, "\n. ", {1,1}, return), % any loc, any options
?line [test_string(S, R) ||
{S, R} <- [{".$\n", [{'.',1},{char,1,$\n}]},
{"$\\\n", [{char,1,$\n}]},
{"'\\\n'", [{atom,1,'\n'}]},
{"$\n", [{char,1,$\n}]}] ],
ok.
chars() ->
[begin
L = lists:flatten(io_lib:format("$\\~.8b", [C])),
Ts = [{char,1,C}],
?line test_string(L, Ts)
end || C <- lists:seq(0, 255)],
%% Leading zeroes...
[begin
L = lists:flatten(io_lib:format("$\\~3.8.0b", [C])),
Ts = [{char,1,C}],
?line test_string(L, Ts)
end || C <- lists:seq(0, 255)],
%% $\^\n now increments the line...
[begin
L = "$\\^" ++ [C],
Ts = [{char,1,C band 2#11111}],
?line test_string(L, Ts)
end || C <- lists:seq(0, 255)],
[begin
L = "$\\" ++ [C],
Ts = [{char,1,V}],
?line test_string(L, Ts)
end || {C,V} <- [{$n,$\n}, {$r,$\r}, {$t,$\t}, {$v,$\v},
{$b,$\b}, {$f,$\f}, {$e,$\e}, {$s,$\s},
{$d,$\d}]],
EC = [$\n,$\r,$\t,$\v,$\b,$\f,$\e,$\s,$\d],
Ds = lists:seq($0, $9),
X = [$^,$n,$r,$t,$v,$b,$f,$e,$s,$d],
New = [${,$x],
No = EC ++ Ds ++ X ++ New,
[begin
L = "$\\" ++ [C],
Ts = [{char,1,C}],
?line test_string(L, Ts)
end || C <- lists:seq(0, 255) -- No],
[begin
L = "'$\\" ++ [C] ++ "'",
Ts = [{atom,1,list_to_atom("$"++[C])}],
?line test_string(L, Ts)
end || C <- lists:seq(0, 255) -- No],
?line test_string("\"\\013a\\\n\"", [{string,1,"\va\n"}]),
?line test_string("'\n'", [{atom,1,'\n'}]),
?line test_string("\"\n\a\"", [{string,1,"\na"}]),
%% No escape
[begin
L = "$" ++ [C],
Ts = [{char,1,C}],
?line test_string(L, Ts)
end || C <- lists:seq(0, 255) -- (No ++ [$\\])],
?line test_string("$\n", [{char,1,$\n}]),
?line {error,{{1,1},erl_scan,char},{1,4}} =
erl_scan:string("$\\^",{1,1}),
?line test_string("$\\\n", [{char,1,$\n}]),
%% Robert's scanner returns line 1:
?line test_string("$\\\n", [{char,1,$\n}]),
?line test_string("$\n\n", [{char,1,$\n}]),
?line test("$\n\n"),
ok.
variables() ->
?line test_string(" \237_Aou�eiy��", [{var,1,'_Aou�eiy��'}]),
?line test_string("A_b_c@", [{var,1,'A_b_c@'}]),
?line test_string("V@2", [{var,1,'V@2'}]),
?line test_string("ABD�", [{var,1,'ABD�'}]),
?line test_string("�rlig �sten", [{var,1,'�rlig'},{var,1,'�sten'}]),
ok.
eof() ->
?line {done,{eof,1},eof} = erl_scan:tokens([], eof, 1),
{more, C1} = erl_scan:tokens([]," \n", 1),
?line {done,{eof,2},eof} = erl_scan:tokens(C1, eof, 1),
{more, C2} = erl_scan:tokens([], "abra", 1),
%% An error before R13A.
%% ?line {done,Err={error,{1,erl_scan,scan},1},eof} =
?line {done,{ok,[{atom,1,abra}],1},eof} =
erl_scan:tokens(C2, eof, 1),
%% With column.
?line {more, C3} = erl_scan:tokens([]," \n",{1,1}),
?line {done,{eof,{2,1}},eof} = erl_scan:tokens(C3, eof, 1),
{more, C4} = erl_scan:tokens([], "abra", {1,1}),
%% An error before R13A.
%% ?line {done,{error,{{1,1},erl_scan,scan},{1,5}},eof} =
?line {done,{ok,[{atom,_,abra}],{1,5}},eof} =
erl_scan:tokens(C4, eof, 1),
%% Robert's scanner returns "" as LeftoverChars;
%% the R12B scanner returns eof as LeftoverChars: (eof is correct)
?line {more, C5} = erl_scan:tokens([], "a", 1),
%% An error before R13A.
%% ?line {done,{error,{1,erl_scan,scan},1},eof} =
?line {done,{ok,[{atom,1,a}],1},eof} =
erl_scan:tokens(C5,eof,1),
%% A dot followed by eof is special:
?line {more, C} = erl_scan:tokens([], "a.", 1),
?line {done,{ok,[{atom,1,a},{dot,1}],1},eof} = erl_scan:tokens(C,eof,1),
?line {ok,[{atom,1,foo},{dot,1}],1} = erl_scan:string("foo."),
ok.
illegal() ->
Atom = lists:duplicate(1000, $a),
?line {error,{1,erl_scan,{illegal,atom}},1} = erl_scan:string(Atom),
?line {done,{error,{1,erl_scan,{illegal,atom}},1},". "} =
erl_scan:tokens([], Atom++". ", 1),
QAtom = "'" ++ Atom ++ "'",
?line {error,{1,erl_scan,{illegal,atom}},1} = erl_scan:string(QAtom),
?line {done,{error,{1,erl_scan,{illegal,atom}},1},". "} =
erl_scan:tokens([], QAtom++". ", 1),
Var = lists:duplicate(1000, $A),
?line {error,{1,erl_scan,{illegal,var}},1} = erl_scan:string(Var),
?line {done,{error,{1,erl_scan,{illegal,var}},1},". "} =
erl_scan:tokens([], Var++". ", 1),
Float = "1" ++ lists:duplicate(400, $0) ++ ".0",
?line {error,{1,erl_scan,{illegal,float}},1} = erl_scan:string(Float),
?line {done,{error,{1,erl_scan,{illegal,float}},1},". "} =
erl_scan:tokens([], Float++". ", 1),
String = "\"43\\x{aaaaaa}34\"",
?line {error,{1,erl_scan,{illegal,character}},1} = erl_scan:string(String),
?line {done,{error,{1,erl_scan,{illegal,character}},1},"34\". "} =
%% Would be nice if `34\"' were skipped...
%% Maybe, but then the LeftOverChars would not be the characters
%% immediately following the end location of the error.
erl_scan:tokens([], String++". ", 1),
?line {error,{{1,1},erl_scan,{illegal,atom}},{1,1001}} =
erl_scan:string(Atom, {1,1}),
?line {done,{error,{{1,5},erl_scan,{illegal,atom}},{1,1005}},". "} =
erl_scan:tokens([], "foo "++Atom++". ", {1,1}),
?line {error,{{1,1},erl_scan,{illegal,atom}},{1,1003}} =
erl_scan:string(QAtom, {1,1}),
?line {done,{error,{{1,5},erl_scan,{illegal,atom}},{1,1007}},". "} =
erl_scan:tokens([], "foo "++QAtom++". ", {1,1}),
?line {error,{{1,1},erl_scan,{illegal,var}},{1,1001}} =
erl_scan:string(Var, {1,1}),
?line {done,{error,{{1,5},erl_scan,{illegal,var}},{1,1005}},". "} =
erl_scan:tokens([], "foo "++Var++". ", {1,1}),
?line {error,{{1,1},erl_scan,{illegal,float}},{1,404}} =
erl_scan:string(Float, {1,1}),
?line {done,{error,{{1,5},erl_scan,{illegal,float}},{1,408}},". "} =
erl_scan:tokens([], "foo "++Float++". ", {1,1}),
?line {error,{{1,4},erl_scan,{illegal,character}},{1,14}} =
erl_scan:string(String, {1,1}),
?line {done,{error,{{1,4},erl_scan,{illegal,character}},{1,14}},"34\". "} =
erl_scan:tokens([], String++". ", {1,1}),
ok.
crashes() ->
?line {'EXIT',_} = (catch {foo, erl_scan:string([-1])}), % type error
?line {'EXIT',_} = (catch {foo, erl_scan:string("$"++[-1])}),
?line {'EXIT',_} = (catch {foo, erl_scan:string("$\\"++[-1])}),
?line {'EXIT',_} = (catch {foo, erl_scan:string("$\\^"++[-1])}),
?line {'EXIT',_} = (catch {foo, erl_scan:string([$",-1,$"],{1,1})}),
?line {'EXIT',_} = (catch {foo, erl_scan:string("\"\\v"++[-1,$"])}), %$"
?line {'EXIT',_} = (catch {foo, erl_scan:string([$",-1,$"])}),
?line {'EXIT',_} = (catch {foo, erl_scan:string("% foo"++[-1])}),
?line {'EXIT',_} =
(catch {foo, erl_scan:string("% foo"++[-1],{1,1})}),
?line {'EXIT',_} = (catch {foo, erl_scan:string([a])}), % type error
?line {'EXIT',_} = (catch {foo, erl_scan:string("$"++[a])}),
?line {'EXIT',_} = (catch {foo, erl_scan:string("$\\"++[a])}),
?line {'EXIT',_} = (catch {foo, erl_scan:string("$\\^"++[a])}),
?line {'EXIT',_} = (catch {foo, erl_scan:string([$",a,$"],{1,1})}),
?line {'EXIT',_} = (catch {foo, erl_scan:string("\"\\v"++[a,$"])}), %$"
?line {'EXIT',_} = (catch {foo, erl_scan:string([$",a,$"])}),
?line {'EXIT',_} = (catch {foo, erl_scan:string("% foo"++[a])}),
?line {'EXIT',_} =
(catch {foo, erl_scan:string("% foo"++[a],{1,1})}),
?line {'EXIT',_} = (catch {foo, erl_scan:string([3.0])}), % type error
ok.
options() ->
%% line and column are not options, but tested here
?line {ok,[{atom,1,foo},{white_space,1," "},{comment,1,"% bar"}], 1} =
erl_scan:string("foo % bar", 1, return),
?line {ok,[{atom,1,foo},{white_space,1," "}],1} =
erl_scan:string("foo % bar", 1, return_white_spaces),
?line {ok,[{atom,1,foo},{comment,1,"% bar"}],1} =
erl_scan:string("foo % bar", 1, return_comments),
?line {ok,[{atom,17,foo}],17} =
erl_scan:string("foo % bar", 17),
?line {'EXIT',{function_clause,_}} =
(catch {foo,
erl_scan:string("foo % bar", {a,1}, [])}), % type error
?line {ok,[{atom,_,foo}],{17,18}} =
erl_scan:string("foo % bar", {17,9}, []),
?line {'EXIT',{function_clause,_}} =
(catch {foo,
erl_scan:string("foo % bar", {1,0}, [])}), % type error
?line {ok,[{foo,1}],1} =
erl_scan:string("foo % bar",1, [{reserved_word_fun,
fun(W) -> W =:= foo end}]),
?line {'EXIT',{badarg,_}} =
(catch {foo,
erl_scan:string("foo % bar",1, % type error
[{reserved_word_fun,
fun(W,_) -> W =:= foo end}])}),
ok.
more_options() ->
?line {ok,[{atom,A1,foo}],{19,20}} =
erl_scan:string("foo", {19,17},[]),
?line [{column,17},{line,19}] = erl_scan:attributes_info(A1),
?line {done,{ok,[{atom,A2,foo},{dot,_}],{19,22}},[]} =
erl_scan:tokens([], "foo. ", {19,17}, [bad_opt]), % type error
?line [{column,17},{line,19}] = erl_scan:attributes_info(A2),
?line {ok,[{atom,A3,foo}],{19,20}} =
erl_scan:string("foo", {19,17},[text]),
?line [{column,17},{length,3},{line,19},{text,"foo"}] =
erl_scan:attributes_info(A3),
?line {ok,[{atom,A4,foo}],1} = erl_scan:string("foo", 1, [text]),
?line [{length,3},{line,1},{text,"foo"}] = erl_scan:attributes_info(A4),
ok.
token_info() ->
?line {ok,[T1],_} = erl_scan:string("foo", {1,18}, [text]),
{'EXIT',{badarg,_}} =
(catch {foo, erl_scan:token_info(T1, foo)}), % type error
?line {line,1} = erl_scan:token_info(T1, line),
?line {column,18} = erl_scan:token_info(T1, column),
?line {length,3} = erl_scan:token_info(T1, length),
?line {text,"foo"} = erl_scan:token_info(T1, text),
?line [{category,atom},{column,18},{length,3},{line,1},
{symbol,foo},{text,"foo"}] =
erl_scan:token_info(T1),
?line [{length,3},{column,18}] =
erl_scan:token_info(T1, [length, column]),
?line [{location,{1,18}}] =
erl_scan:token_info(T1, [location]),
?line {category,atom} = erl_scan:token_info(T1, category),
?line [{symbol,foo}] = erl_scan:token_info(T1, [symbol]),
?line {ok,[T2],_} = erl_scan:string("foo", 1, []),
?line {line,1} = erl_scan:token_info(T2, line),
?line undefined = erl_scan:token_info(T2, column),
?line undefined = erl_scan:token_info(T2, length),
?line undefined = erl_scan:token_info(T2, text),
?line {location,1} = erl_scan:token_info(T2, location),
?line [{category,atom},{line,1},{symbol,foo}] = erl_scan:token_info(T2),
?line [{line,1}] = erl_scan:token_info(T2, [length, line]),
?line {ok,[T3],_} = erl_scan:string("=", 1, []),
?line [{line,1}] = erl_scan:token_info(T3, [column, line]),
?line {category,'='} = erl_scan:token_info(T3, category),
?line [{symbol,'='}] = erl_scan:token_info(T3, [symbol]),
ok.
attributes_info() ->
?line {'EXIT',_} =
(catch {foo,erl_scan:attributes_info(foo)}), % type error
?line [{line,18}] = erl_scan:attributes_info(18),
?line {location,19} = erl_scan:attributes_info(19, location),
?line {ok,[{atom,A0,foo}],_} = erl_scan:string("foo", 19, [text]),
?line {location,19} = erl_scan:attributes_info(A0, location),
?line {ok,[{atom,A3,foo}],_} = erl_scan:string("foo", {1,3}, [text]),
?line {line,1} = erl_scan:attributes_info(A3, line),
?line {column,3} = erl_scan:attributes_info(A3, column),
?line {location,{1,3}} = erl_scan:attributes_info(A3, location),
?line {text,"foo"} = erl_scan:attributes_info(A3, text),
?line {ok,[{atom,A4,foo}],_} = erl_scan:string("foo", 2, [text]),
?line {line,2} = erl_scan:attributes_info(A4, line),
?line undefined = erl_scan:attributes_info(A4, column),
?line {location,2} = erl_scan:attributes_info(A4, location),
?line {text,"foo"} = erl_scan:attributes_info(A4, text),
?line {ok,[{atom,A5,foo}],_} = erl_scan:string("foo", {1,3}, []),
?line {line,1} = erl_scan:attributes_info(A5, line),
?line {column,3} = erl_scan:attributes_info(A5, column),
?line {location,{1,3}} = erl_scan:attributes_info(A5, location),
?line undefined = erl_scan:attributes_info(A5, text),
?line undefined = erl_scan:attributes_info([], line), % type error
ok.
set_attribute() ->
F = fun(Line) -> -Line end,
?line -2 = erl_scan:set_attribute(line, 2, F),
?line {ok,[{atom,A1,foo}],_} = erl_scan:string("foo", {9,17}),
?line A2 = erl_scan:set_attribute(line, A1, F),
?line {line,-9} = erl_scan:attributes_info(A2, line),
?line {location,{-9,17}} = erl_scan:attributes_info(A2, location),
?line [{line,-9},{column,17}] =
erl_scan:attributes_info(A2, [line,column,text]),
F2 = fun(Line) -> {17,Line} end,
?line Attr1 = erl_scan:set_attribute(line, 2, F2),
?line {line,{17,2}} = erl_scan:attributes_info(Attr1, line),
?line undefined = erl_scan:attributes_info(Attr1, column),
?line {location,{17,2}} = % a bit mixed up
erl_scan:attributes_info(Attr1, location),
?line A3 = erl_scan:set_attribute(line, A1, F2),
?line {line,{17,9}} = erl_scan:attributes_info(A3, line),
?line {location,{{17,9},17}} = erl_scan:attributes_info(A3, location),
?line [{line,{17,9}},{column,17}] =
erl_scan:attributes_info(A3, [line,column,text]),
?line {ok,[{atom,A4,foo}],_} = erl_scan:string("foo", {9,17}, [text]),
?line A5 = erl_scan:set_attribute(line, A4, F),
?line {line,-9} = erl_scan:attributes_info(A5, line),
?line {location,{-9,17}} = erl_scan:attributes_info(A5, location),
?line [{line,-9},{column,17},{text,"foo"}] =
erl_scan:attributes_info(A5, [line,column,text]),
?line {ok,[{atom,A6,foo}],_} = erl_scan:string("foo", 11, [text]),
?line A7 = erl_scan:set_attribute(line, A6, F2),
?line {line,{17,11}} = erl_scan:attributes_info(A7, line),
?line {location,{17,11}} = % mixed up
erl_scan:attributes_info(A7, location),
?line [{line,{17,11}},{text,"foo"}] =
erl_scan:attributes_info(A7, [line,column,text]),
?line {'EXIT',_} =
(catch {foo, erl_scan:set_attribute(line, [], F2)}), % type error
?line {'EXIT',{badarg,_}} =
(catch {foo, erl_scan:set_attribute(column, [], F2)}), % type error
ok.
column_errors() ->
?line {error,{{1,1},erl_scan,{string,$',""}},{1,3}} = % $'
erl_scan:string("'\\",{1,1}),
?line {error,{{1,1},erl_scan,{string,$",""}},{1,3}} = % $"
erl_scan:string("\"\\",{1,1}),
?line {error,{{1,1},erl_scan,{string,$',""}},{1,2}} = % $'
erl_scan:string("'",{1,1}),
?line {error,{{1,1},erl_scan,{string,$",""}},{1,2}} = % $"
erl_scan:string("\"",{1,1}),
?line {error,{{1,1},erl_scan,char},{1,2}} =
erl_scan:string("$",{1,1}),
?line {error,{{1,2},erl_scan,{string,$',"1234567890123456"}},{1,20}} = %'
erl_scan:string(" '12345678901234567", {1,1}),
?line {error,{{1,2},erl_scan,{string,$',"123456789012345 "}}, {1,20}} = %'
erl_scan:string(" '123456789012345\\s", {1,1}),
?line {error,{{1,2},erl_scan,{string,$","1234567890123456"}},{1,20}} = %"
erl_scan:string(" \"12345678901234567", {1,1}),
?line {error,{{1,2},erl_scan,{string,$","123456789012345 "}}, {1,20}} = %"
erl_scan:string(" \"123456789012345\\s", {1,1}),
?line {error,{{1,2},erl_scan,{string,$',"1234567890123456"}},{2,1}} = %'
erl_scan:string(" '12345678901234567\n", {1,1}),
ok.
white_spaces() ->
?line {ok,[{white_space,_,"\r"},
{white_space,_," "},
{atom,_,a},
{white_space,_,"\n"}],
_} = erl_scan:string("\r a\n", {1,1}, return),
?line test("\r a\n"),
L = "{\"a\nb\", \"a\\nb\",\nabc\r,def}.\n\n",
?line {ok,[{'{',_},
{string,_,"a\nb"},
{',',_},
{white_space,_," "},
{string,_,"a\nb"},
{',',_},
{white_space,_,"\n"},
{atom,_,abc},
{white_space,_,"\r"},
{',',_},
{atom,_,def},
{'}',_},
{dot,_},
{white_space,_,"\n"}],
_} = erl_scan:string(L, {1,1}, return),
?line test(L),
?line test("\"\n\"\n"),
?line test("\n\r\n"),
?line test("\n\r"),
?line test("\r\n"),
?line test("\n\f"),
?line [test(lists:duplicate(N, $\t)) || N <- lists:seq(1, 20)],
?line [test([$\n|lists:duplicate(N, $\t)]) || N <- lists:seq(1, 20)],
?line [test(lists:duplicate(N, $\s)) || N <- lists:seq(1, 20)],
?line [test([$\n|lists:duplicate(N, $\s)]) || N <- lists:seq(1, 20)],
?line test("\v\f\n\v "),
?line test("\n\e\n\b\f\n\da\n"),
ok.
unicode() ->
?line {ok,[{char,1,83},{integer,1,45}],1} =
erl_scan:string("$\\12345"), % not unicode
?line {error,{1,erl_scan,{illegal,character}},1} =
erl_scan:string([1089]),
?line {error,{{1,1},erl_scan,{illegal,character}},{1,2}} =
erl_scan:string([1089], {1,1}),
?line {error,{1,erl_scan,{illegal,character}},1} =
%% ?line {error,{1,erl_scan,{illegal,atom}},1} =
erl_scan:string("'a"++[1089]++"b'"),
?line {error,{{1,3},erl_scan,{illegal,character}},{1,4}} =
erl_scan:string("'a"++[1089]++"b'", {1,1}),
?line test("\"a"++[1089]++"b\""),
?line {ok,[{char,1,1}],1} = erl_scan:string([$$,$\\,$^,1089]),
?line {error,{1,erl_scan,Error},1} = erl_scan:string("\"qa\x{aaa}"),
?line "unterminated string starting with \"qa\\x{AAA}\"" =
erl_scan:format_error(Error),
?line {error,{{1,1},erl_scan,_},{1,11}} =
erl_scan:string("\"qa\\x{aaa}",{1,1}),
?line {error,{{1,4},erl_scan,{illegal,character}},{1,11}} =
erl_scan:string("'qa\\x{aaa}'",{1,1}),
Tags = [category, column, length, line, symbol, text],
%% Workaround. No character codes greater than 255! To be changed.
%% Note: don't remove these tests, just modify them!
?line {ok,[{integer,1,1089}],1} = erl_scan:string([$$,1089]),
?line {ok,[{integer,1,1089}],1} = erl_scan:string([$$,$\\,1089]),
Qs = "$\\x{aaa}",
?line {ok,[{integer,1,16#aaa}],1} = erl_scan:string(Qs),
?line {ok,[Q2],{1,9}} = erl_scan:string("$\\x{aaa}", {1,1}, text),
?line [{category,integer},{column,1},{length,8},
{line,1},{symbol,16#aaa},{text,Qs}] =
erl_scan:token_info(Q2),
U1 = "\"\\x{aaa}\"",
?line {ok,[T1,T2,T3],{1,10}} = erl_scan:string(U1, {1,1}, text),
?line [{category,'['},{column,1},{length,1},{line,1},
{symbol,'['},{text,"\""}] = erl_scan:token_info(T1, Tags),
?line [{category,integer},{column,2},{length,7},
{line,1},{symbol,16#aaa},{text,"\\x{aaa}"}] =
erl_scan:token_info(T2, Tags),
?line [{category,']'},{column,9},{length,1},{line,1},
{symbol,']'},{text,"\""}] = erl_scan:token_info(T3, Tags),
?line {ok,[{'[',1},{integer,1,16#aaa},{']',1}],1} =
erl_scan:string(U1, 1),
U2 = "\"\\x41\\x{fff}\\x42\"",
?line {ok,[{'[',1},{char,1,16#41},{',',1},{integer,1,16#fff},
{',',1},{char,1,16#42},{']',1}],1} = erl_scan:string(U2, 1),
U3 = "\"a\n\\x{fff}\n\"",
?line {ok,[{'[',1},{char,1,$a},{',',1},{char,1,$\n},
{',',2},{integer,2,16#fff},{',',2},{char,2,$\n},
{']',3}],3} =
erl_scan:string(U3, 1),
U4 = "\"\\^\n\\x{aaa}\\^\n\"",
?line {ok,[{'[',1},{char,1,$\n},{',',2},{integer,2,16#aaa},
{',',2},{char,2,$\n},{']',3}],3} = erl_scan:string(U4, 1),
%% Keep these tests:
?line test(Qs),
?line test(U1),
?line test(U2),
?line test(U3),
?line test(U4),
Str1 = "\"ab" ++ [1089] ++ "cd\"",
?line {ok,[{'[',1},{char,1,$a},{',',1},{char,1,$b},{',',1},
{integer,1,1089},{',',1},{char,1,$c},{',',1},
{char,1,$d},{']',1}],1} = erl_scan:string(Str1),
?line {ok,[{'[',_},{char,_,$a},{',',_},{char,_,$b},{',',_},
{integer,_,1089},{',',_},{char,_,$c},{',',_},
{char,_,$d},{']',_}],{1,8}} = erl_scan:string(Str1, {1,1}),
?line test(Str1),
Comment = "%% "++[1089],
?line {ok,[{comment,1,[$%,$%,$\s,1089]}],1} =
erl_scan:string(Comment, 1, return),
?line {ok,[{comment,_,[$%,$%,$\s,1089]}],{1,5}} =
erl_scan:string(Comment, {1,1}, return),
ok.
more_chars() ->
%% Due to unicode, the syntax has been incompatibly augmented:
%% $\x{...}, $\xHH
%% All kinds of tests...
?line {ok,[{char,_,123}],{1,4}} =
erl_scan:string("$\\{",{1,1}),
?line {more, C1} = erl_scan:tokens([], "$\\{", {1,1}),
?line {done,{ok,[{char,_,123}],{1,4}},eof} =
erl_scan:tokens(C1, eof, 1),
?line {ok,[{char,1,123},{atom,1,a},{'}',1}],1} =
erl_scan:string("$\\{a}"),
?line {error,{{1,1},erl_scan,char},{1,4}} =
erl_scan:string("$\\x", {1,1}),
?line {error,{{1,1},erl_scan,char},{1,5}} =
erl_scan:string("$\\x{",{1,1}),
?line {more, C3} = erl_scan:tokens([], "$\\x", {1,1}),
?line {done,{error,{{1,1},erl_scan,char},{1,4}},eof} =
erl_scan:tokens(C3, eof, 1),
?line {error,{{1,1},erl_scan,char},{1,5}} =
erl_scan:string("$\\x{",{1,1}),
?line {more, C2} = erl_scan:tokens([], "$\\x{", {1,1}),
?line {done,{error,{{1,1},erl_scan,char},{1,5}},eof} =
erl_scan:tokens(C2, eof, 1),
?line {error,{1,erl_scan,{illegal,character}},1} =
erl_scan:string("$\\x{g}"),
?line {error,{{1,1},erl_scan,{illegal,character}},{1,5}} =
erl_scan:string("$\\x{g}", {1,1}),
?line {error,{{1,1},erl_scan,{illegal,character}},{1,6}} =
erl_scan:string("$\\x{}",{1,1}),
?line test("\"\\{0}\""),
?line test("\"\\x{0}\""),
?line test("\'\\{0}\'"),
?line test("\'\\x{0}\'"),
?line {error,{{2,3},erl_scan,{illegal,character}},{2,6}} =
erl_scan:string("\"ab \n $\\x{g}\"",{1,1}),
?line {error,{{2,3},erl_scan,{illegal,character}},{2,6}} =
erl_scan:string("\'ab \n $\\x{g}\'",{1,1}),
?line test("$\\{34}"),
?line test("$\\x{34}"),
?line test("$\\{377}"),
?line test("$\\x{FF}"),
?line test("$\\{400}"),
?line test("$\\x{100}"),
?line test("$\\x{10FFFF}"),
?line test("$\\x{10ffff}"),
?line test("\"$\n \\{1}\""),
?line {error,{1,erl_scan,{illegal,character}},1} =
erl_scan:string("$\\x{110000}"),
?line {error,{{1,1},erl_scan,{illegal,character}},{1,12}} =
erl_scan:string("$\\x{110000}", {1,1}),
?line {error,{{1,1},erl_scan,{illegal,character}},{1,4}} =
erl_scan:string("$\\xfg", {1,1}),
?line test("$\\xffg"),
?line {error,{{1,1},erl_scan,{illegal,character}},{1,4}} =
erl_scan:string("$\\xg", {1,1}),
ok.
test_string(String, Expected) ->
{ok, Expected, _End} = erl_scan:string(String),
test(String).
%% test_string(String, Expected, StartLocation, Options) ->
%% {ok, Expected, _End} = erl_scan:string(String, StartLocation, Options),
%% test(String).
%% There are no checks of the tags...
test(String) ->
%% io:format("Testing `~ts'~n", [String]),
[{Tokens, End},
{Wtokens, Wend},
{Ctokens, Cend},
{CWtokens, CWend},
{CWtokens2, _}] =
[scan_string_with_column(String, X) ||
X <- [[],
[return_white_spaces],
[return_comments],
[return],
[return]]], % for white space compaction test
{end1,End,Wend} = {end1,Wend,End},
{end2,Wend,Cend} = {end2,Cend,Wend},
{end3,Cend,CWend} = {end3,CWend,Cend},
%% Test that the tokens that are common to two token lists are identical.
{none,Tokens} = {none, filter_tokens(CWtokens, [white_space,comment])},
{comments,Ctokens} =
{comments,filter_tokens(CWtokens, [white_space])},
{white_spaces,Wtokens} =
{white_spaces,filter_tokens(CWtokens, [comment])},
%% Use token attributes to extract parts from the original string,
%% and check that the parts are identical to the token strings.
{Line,Column} = test_decorated_tokens(String, CWtokens),
{deco,{Line,Column},End} = {deco,End,{Line,Column}},
%% Almost the same again: concat texts to get the original:
Text = get_text(CWtokens),
{text,Text,String} = {text,String,Text},
%% Test that white spaces occupy less heap than the worst case.
ok = test_white_space_compaction(CWtokens, CWtokens2),
%% Test that white newlines are always first in text:
WhiteTokens = select_tokens(CWtokens, [white_space]),
ok = newlines_first(WhiteTokens),
%% Line attribute only:
[Simple,Wsimple,Csimple,WCsimple] = Simples =
[element(2, erl_scan:string(String, 1, Opts)) ||
Opts <- [[],
[return_white_spaces],
[return_comments],
[return]]],
{consistent,true} = {consistent,consistent_attributes(Simples)},
{simple_wc,WCsimple} = {simple_wc,simplify(CWtokens)},
{simple,Simple} = {simple,filter_tokens(WCsimple, [white_space,comment])},
{simple_c,Csimple} = {simple_c,filter_tokens(WCsimple, [white_space])},
{simple_w,Wsimple} = {simple_w,filter_tokens(WCsimple, [comment])},
%% Line attribute only, with text:
[SimpleTxt,WsimpleTxt,CsimpleTxt,WCsimpleTxt] = SimplesTxt =
[element(2, erl_scan:string(String, 1, [text|Opts])) ||
Opts <- [[],
[return_white_spaces],
[return_comments],
[return]]],
TextTxt = get_text(WCsimpleTxt),
{text_txt,TextTxt,String} = {text_txt,String,TextTxt},
{consistent_txt,true} =
{consistent_txt,consistent_attributes(SimplesTxt)},
{simple_txt,SimpleTxt} =
{simple_txt,filter_tokens(WCsimpleTxt, [white_space,comment])},
{simple_c_txt,CsimpleTxt} =
{simple_c_txt,filter_tokens(WCsimpleTxt, [white_space])},
{simple_w_txt,WsimpleTxt} =
{simple_w_txt,filter_tokens(WCsimpleTxt, [comment])},
ok.
test_white_space_compaction(Tokens, Tokens2) when Tokens =:= Tokens2 ->
[WS, WS2] = [select_tokens(Ts, [white_space]) || Ts <- [Tokens, Tokens2]],
test_wsc(WS, WS2).
test_wsc([], []) ->
ok;
test_wsc([Token|Tokens], [Token2|Tokens2]) ->
[Text, Text2] = [Text ||
{text, Text} <-
[erl_scan:token_info(T, text) ||
T <- [Token, Token2]]],
Sz = erts_debug:size(Text),
Sz2 = erts_debug:size({Text, Text2}),
IsCompacted = Sz2 < 2*Sz+erts_debug:size({a,a}),
ToBeCompacted = is_compacted(Text),
if
IsCompacted =:= ToBeCompacted ->
test_wsc(Tokens, Tokens2);
true ->
{compaction_error, Token}
end.
is_compacted("\r") ->
true;
is_compacted("\n\r") ->
true;
is_compacted("\n\f") ->
true;
is_compacted([$\n|String]) ->
all_spaces(String)
orelse
all_tabs(String);
is_compacted(String) ->
all_spaces(String)
orelse
all_tabs(String).
all_spaces(L) ->
all_same(L, $\s).
all_tabs(L) ->
all_same(L, $\t).
all_same(L, Char) ->
lists:all(fun(C) -> C =:= Char end, L).
newlines_first([]) ->
ok;
newlines_first([Token|Tokens]) ->
{text,Text} = erl_scan:token_info(Token, text),
Nnls = length([C || C <- Text, C =:= $\n]),
OK = case Text of
[$\n|_] ->
Nnls =:= 1;
_ ->
Nnls =:= 0
end,
if
OK -> newlines_first(Tokens);
true -> OK
end.
filter_tokens(Tokens, Tags) ->
lists:filter(fun(T) -> not lists:member(element(1, T), Tags) end, Tokens).
select_tokens(Tokens, Tags) ->
lists:filter(fun(T) -> lists:member(element(1, T), Tags) end, Tokens).
simplify([Token|Tokens]) ->
{line,Line} = erl_scan:token_info(Token, line),
[setelement(2, Token, Line) | simplify(Tokens)];
simplify([]) ->
[].
get_text(Tokens) ->
lists:flatten(
[T ||
Token <- Tokens,
({text,T} = erl_scan:token_info(Token, text)) =/= []]).
test_decorated_tokens(String, Tokens) ->
ToksAttrs = token_attrs(Tokens),
test_strings(ToksAttrs, String, 1, 1).
token_attrs(Tokens) ->
[{L,C,Len,T} ||
Token <- Tokens,
([{line,L},{column,C},{length,Len},{text,T}] =
erl_scan:token_info(Token, [line,column,length,text])) =/= []].
test_strings([], _S, Line, Column) ->
{Line,Column};
test_strings([{L,C,Len,T}=Attr|Attrs], String0, Line0, Column0) ->
{String1, Column1} = skip_newlines(String0, L, Line0, Column0),
String = skip_chars(String1, C-Column1),
{Str,Rest} = lists:split(Len, String),
if
Str =:= T ->
{Line,Column} = string_newlines(T, L, C),
test_strings(Attrs, Rest, Line, Column);
true ->
{token_error, Attr, Str}
end.
skip_newlines(String, Line, Line, Column) ->
{String, Column};
skip_newlines([$\n|String], L, Line, _Column) ->
skip_newlines(String, L, Line+1, 1);
skip_newlines([_|String], L, Line, Column) ->
skip_newlines(String, L, Line, Column+1).
skip_chars(String, 0) ->
String;
skip_chars([_|String], N) ->
skip_chars(String, N-1).
string_newlines([$\n|String], Line, _Column) ->
string_newlines(String, Line+1, 1);
string_newlines([], Line, Column) ->
{Line, Column};
string_newlines([_|String], Line, Column) ->
string_newlines(String, Line, Column+1).
scan_string_with_column(String, Options0) ->
Options = [text | Options0],
StartLoc = {1, 1},
{ok, Ts1, End1} = erl_scan:string(String, StartLoc, Options),
TString = String ++ ". ",
{ok,Ts2,End2} = scan_tokens(TString, Options, [], StartLoc),
{ok, Ts3, End3} =
scan_tokens_1({more, []}, TString, Options, [], StartLoc),
{end_2,End2,End3} = {end_2,End3,End2},
{EndLine1,EndColumn1} = End1,
End2 = {EndLine1,EndColumn1+2},
{ts_1,Ts2,Ts3} = {ts_1,Ts3,Ts2},
Ts2 = Ts1 ++ [lists:last(Ts2)],
%% Attributes are keylists, but have no text.
{ok, Ts7, End7} = erl_scan:string(String, {1,1}, Options),
{ok, Ts8, End8} = scan_tokens(TString, Options, [], {1,1}),
{end1, End1} = {end1, End7},
{end2, End2} = {end2, End8},
Ts8 = Ts7 ++ [lists:last(Ts8)],
{cons,true} = {cons,consistent_attributes([Ts1,Ts2,Ts3,Ts7,Ts8])},
{Ts1, End1}.
scan_tokens(String, Options, Rs, Location) ->
case erl_scan:tokens([], String, Location, Options) of
{done, {ok,Ts,End}, ""} ->
{ok, lists:append(lists:reverse([Ts|Rs])), End};
{done, {ok,Ts,End}, Rest} ->
scan_tokens(Rest, Options, [Ts|Rs], End)
end.
scan_tokens_1({done, {ok,Ts,End}, ""}, "", _Options, Rs, _Location) ->
{ok,lists:append(lists:reverse([Ts|Rs])),End};
scan_tokens_1({done, {ok,Ts,End}, Rest}, Cs, Options, Rs, _Location) ->
scan_tokens_1({more,[]}, Rest++Cs, Options, [Ts|Rs], End);
scan_tokens_1({more, Cont}, [C | Cs], Options, Rs, Loc) ->
R = erl_scan:tokens(Cont, [C], Loc, Options),
scan_tokens_1(R, Cs, Options, Rs, Loc).
consistent_attributes([]) ->
true;
consistent_attributes([Ts | TsL]) ->
L = [T || T <- Ts, is_integer(element(2, T))],
case L of
[] ->
TagsL = [[Tag || {Tag,_} <-
erl_scan:attributes_info(element(2, T))] ||
T <- Ts],
case lists:usort(TagsL) of
[_] ->
consistent_attributes(TsL);
[] when Ts =:= [] ->
consistent_attributes(TsL);
_ ->
Ts
end;
Ts ->
consistent_attributes(TsL);
_ ->
Ts
end.
family_list(L) ->
sofs:to_external(family(L)).
family(L) ->
sofs:relation_to_family(sofs:relation(L)).
