diff options
Diffstat (limited to 'lib/stdlib/src/erl_scan.erl')
| -rw-r--r-- | lib/stdlib/src/erl_scan.erl | 225 |
1 files changed, 142 insertions, 83 deletions
diff --git a/lib/stdlib/src/erl_scan.erl b/lib/stdlib/src/erl_scan.erl index d880656565..818703284f 100644 --- a/lib/stdlib/src/erl_scan.erl +++ b/lib/stdlib/src/erl_scan.erl @@ -55,7 +55,14 @@ token_info/1,token_info/2, attributes_info/1,attributes_info/2,set_attribute/3]). --export_type([error_info/0, line/0, return_cont/0, tokens_result/0]). +%%% Private +-export([continuation_location/1]). + +-export_type([error_info/0, + line/0, + options/0, + return_cont/0, + tokens_result/0]). %%% %%% Defines and type definitions @@ -74,7 +81,8 @@ -type location() :: line() | {line(),column()}. -type resword_fun() :: fun((atom()) -> boolean()). -type option() :: 'return' | 'return_white_spaces' | 'return_comments' - | 'text' | {'reserved_word_fun', resword_fun()}. + | 'text' | {'reserved_word_fun', resword_fun()} + | 'unicode'. -type options() :: option() | [option()]. -type symbol() :: atom() | float() | integer() | string(). -type info_line() :: integer() | term(). @@ -95,7 +103,8 @@ {resword_fun = fun reserved_word/1 :: resword_fun(), ws = false :: boolean(), comment = false :: boolean(), - text = false :: boolean()}). + text = false :: boolean(), + unicode = false :: boolean()}). %%---------------------------------------------------------------------------- @@ -183,6 +192,11 @@ tokens({erl_scan_continuation,Cs,Col,Toks,Line,St,Any,Fun}, CharSpec, _Loc, _Opts) -> tokens1(Cs++CharSpec, St, Line, Col, Toks, Fun, Any). +continuation_location({erl_scan_continuation,_,no_col,_,Line,_,_,_}) -> + Line; +continuation_location({erl_scan_continuation,_,Col,_,Line,_,_,_}) -> + {Line,Col}. + -type attribute_item() :: 'column' | 'length' | 'line' | 'location' | 'text'. -type info_location() :: location() | term(). @@ -322,13 +336,20 @@ string_thing(_) -> "string". (C >= $\000 andalso C =< $\s orelse C >= $\200 andalso C =< $\240)). -define(DIGIT(C), C >= $0, C =< $9). -define(CHAR(C), is_integer(C), C >= 0). - -%% A workaround: Unicode strings are not returned as strings, but as -%% lists of integers. For instance, "b\x{aaa}c" => [98,2730,99]. This -%% is to protect the system from character codes greater than 255. To -%% be removed. Search for UNI to find workaround code. +-define(UNICODE(C), + (C >= 0 andalso C < 16#D800 orelse + C > 16#DFFF andalso C < 16#FFFE orelse + C > 16#FFFF andalso C =< 16#10FFFF)). + +%% When the option 'unicode' is false: return Unicode strings as lists +%% of integers and Unicode characters as integers. For instance, +%% erl_scan:string("\"b\x{aaa}c\".") is equivalent to +%% erl_scan:string("[98,2730,99]."). This is to protect the caller +%% from character codes greater than 255. Search for UNI to find code +%% implementing this "feature". The 'unicode' option is undocumented +%% and will probably be removed later. -define(NO_UNICODE, 0). --define(UNI255(C), (C) =< 16#ff). +-define(UNI255(C), (C =< 16#ff)). options(Opts0) when is_list(Opts0) -> Opts = lists:foldr(fun expand_opt/2, [], Opts0), @@ -342,10 +363,12 @@ options(Opts0) when is_list(Opts0) -> Comment = proplists:get_bool(return_comments, Opts), WS = proplists:get_bool(return_white_spaces, Opts), Txt = proplists:get_bool(text, Opts), + Unicode = proplists:get_bool(unicode, Opts), #erl_scan{resword_fun = RW_fun, comment = Comment, ws = WS, - text = Txt}; + text = Txt, + unicode = Unicode}; options(Opt) -> options([Opt]). @@ -626,15 +649,12 @@ scan1([$~|Cs], St, Line, Col, Toks) -> scan1([$&|Cs], St, Line, Col, Toks) -> tok2(Cs, St, Line, Col, Toks, "&", '&', 1); %% End of optimization. -scan1([C|Cs], St, Line, Col, Toks) when ?CHAR(C) -> +scan1([C|Cs], St, Line, Col, Toks) when ?CHAR(C), ?UNI255(C) -> Str = [C], - case catch list_to_atom(Str) of - Sym when is_atom(Sym) -> - tok2(Cs, St, Line, Col, Toks, Str, Sym, 1); - _ -> - Ncol = incr_column(Col, 1), - scan_error({illegal,character}, Line, Col, Line, Ncol, Cs) - end; + tok2(Cs, St, Line, Col, Toks, Str, list_to_atom(Str), 1); +scan1([C|Cs], _St, Line, Col, _Toks) when ?CHAR(C) -> + Ncol = incr_column(Col, 1), + scan_error({illegal,character}, Line, Col, Line, Ncol, Cs); scan1([]=Cs, _St, Line, Col, Toks) -> {more,{Cs,Col,Toks,Line,[],fun scan/6}}; scan1(eof=Cs, _St, Line, Col, Toks) -> @@ -832,32 +852,44 @@ scan_char([$\\|Cs]=Cs0, St, Line, Col, Toks) -> {eof,Ncol} -> scan_error(char, Line, Col, Line, Ncol, eof); {nl,Val,Str,Ncs,Ncol} -> - Attrs = attributes(Line, Col, St, "$\\"++Str), + Attrs = attributes(Line, Col, St, "$\\"++Str), %" Ntoks = [{char,Attrs,Val}|Toks], scan1(Ncs, St, Line+1, Ncol, Ntoks); {unicode,Val,Str,Ncs,Ncol} -> - Attrs = attributes(Line, Col, St, "$\\"++Str), - Ntoks = [{integer,Attrs,Val}|Toks], % UNI + Attrs = attributes(Line, Col, St, "$\\"++Str), %" + Tag = char_tag(Val, St), % UNI + Ntoks = [{Tag,Attrs,Val}|Toks], scan1(Ncs, St, Line, Ncol, Ntoks); {Val,Str,Ncs,Ncol} -> - Attrs = attributes(Line, Col, St, "$\\"++Str), + Attrs = attributes(Line, Col, St, "$\\"++Str), %" Ntoks = [{char,Attrs,Val}|Toks], scan1(Ncs, St, Line, Ncol, Ntoks) end; scan_char([$\n=C|Cs], St, Line, Col, Toks) -> Attrs = attributes(Line, Col, St, [$$,C]), scan1(Cs, St, Line+1, new_column(Col, 1), [{char,Attrs,C}|Toks]); -scan_char([C|Cs], St, Line, Col, Toks) when ?CHAR(C) -> - Tag = if ?UNI255(C) -> char; true -> integer end, % UNI +scan_char([C|Cs], St, Line, Col, Toks) when ?UNICODE(C) -> + Tag = char_tag(C, St), % UNI Attrs = attributes(Line, Col, St, [$$,C]), scan1(Cs, St, Line, incr_column(Col, 2), [{Tag,Attrs,C}|Toks]); +scan_char([C|_Cs], _St, Line, Col, _Toks) when ?CHAR(C) -> + scan_error({illegal,character}, Line, Col, Line, incr_column(Col, 1), eof); scan_char([], _St, Line, Col, Toks) -> {more,{[$$],Col,Toks,Line,[],fun scan/6}}; scan_char(eof, _St, Line, Col, _Toks) -> scan_error(char, Line, Col, Line, incr_column(Col, 1), eof). +-compile({inline,[char_tag/2]}). + +char_tag(C, _St) when ?UNI255(C) -> + char; +char_tag(_C, #erl_scan{unicode = true}) -> + char; +char_tag(_C, _St) -> + integer. + scan_string(Cs, St, Line, Col, Toks, {Wcs,Str,Line0,Col0,Uni0}) -> - case scan_string0(Cs, St, Line, Col, $\", Str, Wcs, Uni0) of + case scan_string0(Cs, St, Line, Col, $\", true, Str, Wcs, Uni0) of %" {more,Ncs,Nline,Ncol,Nstr,Nwcs,Uni} -> State = {Nwcs,Nstr,Line0,Col0,Uni}, {more,{Ncs,Ncol,Toks,Nline,State,fun scan_string/6}}; @@ -865,8 +897,9 @@ scan_string(Cs, St, Line, Col, Toks, {Wcs,Str,Line0,Col0,Uni0}) -> scan_error(Error, Nline, Ncol, Nline, EndCol, Ncs); {error,Nline,Ncol,Nwcs,Ncs} -> Estr = string:substr(Nwcs, 1, 16), % Expanded escape chars. - scan_error({string,$\",Estr}, Line0, Col0, Nline, Ncol, Ncs); - {Ncs,Nline,Ncol,Nstr,Nwcs,?NO_UNICODE} -> + scan_error({string,$\",Estr}, Line0, Col0, Nline, Ncol, Ncs); %" + {Ncs,Nline,Ncol,Nstr,Nwcs,Uni} when Uni =:= ?NO_UNICODE; + St#erl_scan.unicode -> Attrs = attributes(Line0, Col0, St, Nstr), scan1(Ncs, St, Nline, Ncol, [{string,Attrs,Nwcs}|Toks]); {Ncs,Nline,Ncol,Nstr,_Nwcs,_Uni} -> @@ -918,7 +951,8 @@ unicode_tokens(Line, Col, Str, Val, St, Toks, Cs, Cline, Ccol) -> [{',',attributes(Cline, Ccol, St, "")} || Cs =/= "\""] ++ [Token|Toks]. scan_qatom(Cs, St, Line, Col, Toks, {Wcs,Str,Line0,Col0,Uni0}) -> - case scan_string0(Cs, St, Line, Col, $\', Str, Wcs, Uni0) of + AllowUni = St#erl_scan.unicode, + case scan_string0(Cs, St, Line, Col, $\', AllowUni, Str, Wcs, Uni0) of %' {more,Ncs,Nline,Ncol,Nstr,Nwcs,Uni} -> State = {Nwcs,Nstr,Line0,Col0,Uni}, {more,{Ncs,Ncol,Toks,Nline,State,fun scan_qatom/6}}; @@ -926,8 +960,9 @@ scan_qatom(Cs, St, Line, Col, Toks, {Wcs,Str,Line0,Col0,Uni0}) -> scan_error(Error, Nline, Ncol, Nline, EndCol, Ncs); {error,Nline,Ncol,Nwcs,Ncs} -> Estr = string:substr(Nwcs, 1, 16), % Expanded escape chars. - scan_error({string,$\',Estr}, Line0, Col0, Nline, Ncol, Ncs); - {Ncs,Nline,Ncol,Nstr,Nwcs,?NO_UNICODE} -> + scan_error({string,$\',Estr}, Line0, Col0, Nline, Ncol, Ncs); %' + {Ncs,Nline,Ncol,Nstr,Nwcs,Uni} -> + true = Uni =:= ?NO_UNICODE orelse AllowUni, case catch list_to_atom(Nwcs) of A when is_atom(A) -> Attrs = attributes(Line0, Col0, St, Nstr), @@ -937,38 +972,40 @@ scan_qatom(Cs, St, Line, Col, Toks, {Wcs,Str,Line0,Col0,Uni0}) -> end end. -scan_string0(Cs, #erl_scan{text=false}, Line, no_col=Col, Q, [], Wcs, Uni) -> - scan_string_no_col(Cs, Line, Col, Q, Wcs, Uni); -scan_string0(Cs, #erl_scan{text=true}, Line, no_col=Col, Q, Str, Wcs, Uni) -> - scan_string1(Cs, Line, Col, Q, Str, Wcs, Uni); -scan_string0(Cs, _St, Line, Col, Q, [], Wcs, Uni) -> - scan_string_col(Cs, Line, Col, Q, Wcs, Uni); -scan_string0(Cs, _St, Line, Col, Q, Str, Wcs, Uni) -> - scan_string1(Cs, Line, Col, Q, Str, Wcs, Uni). +scan_string0(Cs, #erl_scan{text=false}, Line, no_col=Col, Q, U, [], Wcs, Uni) -> + scan_string_no_col(Cs, Line, Col, Q, U, Wcs, Uni); +scan_string0(Cs, #erl_scan{text=true}, Line, no_col=Col, Q, U, Str, Wcs, Uni) -> + scan_string1(Cs, Line, Col, Q, U, Str, Wcs, Uni); +scan_string0(Cs, _St, Line, Col, Q, U, [], Wcs, Uni) -> + scan_string_col(Cs, Line, Col, Q, U, Wcs, Uni); +scan_string0(Cs, _St, Line, Col, Q, U, Str, Wcs, Uni) -> + scan_string1(Cs, Line, Col, Q, U, Str, Wcs, Uni). %% Optimization. Col =:= no_col. -scan_string_no_col([Q|Cs], Line, Col, Q, Wcs, Uni) -> +scan_string_no_col([Q|Cs], Line, Col, Q, _U, Wcs, Uni) -> {Cs,Line,Col,_DontCare=[],lists:reverse(Wcs),Uni}; -scan_string_no_col([$\n=C|Cs], Line, Col, Q, Wcs, Uni) -> - scan_string_no_col(Cs, Line+1, Col, Q, [C|Wcs], Uni); -scan_string_no_col([C|Cs], Line, Col, Q, Wcs, Uni) when C =/= $\\, - ?CHAR(C), ?UNI255(C) -> - scan_string_no_col(Cs, Line, Col, Q, [C|Wcs], Uni); -scan_string_no_col(Cs, Line, Col, Q, Wcs, Uni) -> - scan_string1(Cs, Line, Col, Q, Wcs, Wcs, Uni). +scan_string_no_col([$\n=C|Cs], Line, Col, Q, U, Wcs, Uni) -> + scan_string_no_col(Cs, Line+1, Col, Q, U, [C|Wcs], Uni); +scan_string_no_col([C|Cs], Line, Col, Q, U, Wcs, Uni) when C =/= $\\, + ?CHAR(C), + ?UNI255(C) -> + scan_string_no_col(Cs, Line, Col, Q, U, [C|Wcs], Uni); +scan_string_no_col(Cs, Line, Col, Q, U, Wcs, Uni) -> + scan_string1(Cs, Line, Col, Q, U, Wcs, Wcs, Uni). %% Optimization. Col =/= no_col. -scan_string_col([Q|Cs], Line, Col, Q, Wcs0, Uni) -> +scan_string_col([Q|Cs], Line, Col, Q, _U, Wcs0, Uni) -> Wcs = lists:reverse(Wcs0), Str = [Q|Wcs++[Q]], {Cs,Line,Col+1,Str,Wcs,Uni}; -scan_string_col([$\n=C|Cs], Line, _xCol, Q, Wcs, Uni) -> - scan_string_col(Cs, Line+1, 1, Q, [C|Wcs], Uni); -scan_string_col([C|Cs], Line, Col, Q, Wcs, Uni) when C =/= $\\, - ?CHAR(C), ?UNI255(C) -> - scan_string_col(Cs, Line, Col+1, Q, [C|Wcs], Uni); -scan_string_col(Cs, Line, Col, Q, Wcs, Uni) -> - scan_string1(Cs, Line, Col, Q, Wcs, Wcs, Uni). +scan_string_col([$\n=C|Cs], Line, _xCol, Q, U, Wcs, Uni) -> + scan_string_col(Cs, Line+1, 1, Q, U, [C|Wcs], Uni); +scan_string_col([C|Cs], Line, Col, Q, U, Wcs, Uni) when C =/= $\\, + ?CHAR(C), + ?UNI255(C) -> + scan_string_col(Cs, Line, Col+1, Q, U, [C|Wcs], Uni); +scan_string_col(Cs, Line, Col, Q, U, Wcs, Uni) -> + scan_string1(Cs, Line, Col, Q, U, Wcs, Wcs, Uni). %% UNI_STR is to be replaced by STR when the Unicode-string-to-list %% workaround is eventually removed. @@ -979,14 +1016,14 @@ scan_string_col(Cs, Line, Col, Q, Wcs, Uni) -> %% but then the end location of the error tuple would not correspond %% to the start location of the returned Rest string. (Maybe the end %% location could be modified, but that too is ugly.) -scan_string1([Q|Cs], Line, Col, Q, Str0, Wcs0, Uni) -> +scan_string1([Q|Cs], Line, Col, Q, _U, Str0, Wcs0, Uni) -> Wcs = lists:reverse(Wcs0), Str = ?UNI_STR(Col, [Q|lists:reverse(Str0, [Q])]), {Cs,Line,incr_column(Col, 1),Str,Wcs,Uni}; -scan_string1([$\n=C|Cs], Line, Col, Q, Str, Wcs, Uni) -> +scan_string1([$\n=C|Cs], Line, Col, Q, U, Str, Wcs, Uni) -> Ncol = new_column(Col, 1), - scan_string1(Cs, Line+1, Ncol, Q, ?UNI_STR(Col, [C|Str]), [C|Wcs], Uni); -scan_string1([$\\|Cs]=Cs0, Line, Col, Q, Str, Wcs, Uni) -> + scan_string1(Cs, Line+1, Ncol, Q, U, ?UNI_STR(Col, [C|Str]), [C|Wcs], Uni); +scan_string1([$\\|Cs]=Cs0, Line, Col, Q, U, Str, Wcs, Uni) -> case scan_escape(Cs, Col) of more -> {more,Cs0,Line,Col,Str,Wcs,Uni}; @@ -997,31 +1034,33 @@ scan_string1([$\\|Cs]=Cs0, Line, Col, Q, Str, Wcs, Uni) -> {nl,Val,ValStr,Ncs,Ncol} -> Nstr = ?UNI_STR(Ncol, lists:reverse(ValStr, [$\\|Str])), Nwcs = [Val|Wcs], - scan_string1(Ncs, Line+1, Ncol, Q, Nstr, Nwcs, Uni); - {unicode,_Val,_ValStr,Ncs,Ncol} when Q =:= $' -> %' Emacs + scan_string1(Ncs, Line+1, Ncol, Q, U, Nstr, Nwcs, Uni); + {unicode,_Val,_ValStr,Ncs,Ncol} when not U -> %' Emacs {char_error,Ncs,{illegal,character},Line,Col,incr_column(Ncol, 1)}; {unicode,Val,ValStr,Ncs,Ncol} -> % UNI. Uni is set to Val. Nstr = ?UNI_STR(Ncol, lists:reverse(ValStr, [$\\|Str])), Nwcs = [Val|Wcs], % not used - scan_string1(Ncs, Line, incr_column(Ncol, 1), Q, Nstr, Nwcs, Val); + scan_string1(Ncs, Line, incr_column(Ncol, 1), Q, U, Nstr, Nwcs, Val); {Val,ValStr,Ncs,Ncol} -> Nstr = ?UNI_STR(Ncol, lists:reverse(ValStr, [$\\|Str])), Nwcs = [Val|Wcs], - scan_string1(Ncs, Line, incr_column(Ncol, 1), Q, Nstr, Nwcs, Uni) + scan_string1(Ncs, Line, incr_column(Ncol, 1), Q, U, Nstr, Nwcs, Uni) end; -scan_string1([C|Cs], Line, no_col=Col, Q, Str, Wcs, Uni) when ?CHAR(C), - ?UNI255(C) -> - %% scan_string1(Cs, Line, Col, Q, Str, [C|Wcs], Uni); - scan_string1(Cs, Line, Col, Q, [C|Str], [C|Wcs], Uni); % UNI -scan_string1([C|Cs], Line, Col, Q, Str, Wcs, Uni) when ?CHAR(C), ?UNI255(C) -> - scan_string1(Cs, Line, Col+1, Q, [C|Str], [C|Wcs], Uni); -scan_string1([C|Cs], Line, Col, $', _Str, _Wcs, _Uni) when ?CHAR(C) -> %' UNI +scan_string1([C|Cs], Line, no_col=Col, Q, U, Str, Wcs, Uni) when ?CHAR(C), + ?UNI255(C) -> + %% scan_string1(Cs, Line, Col, Q, U, Str, [C|Wcs], Uni); + scan_string1(Cs, Line, Col, Q, U, [C|Str], [C|Wcs], Uni); % UNI +scan_string1([C|Cs], Line, Col, Q, U, Str, Wcs, Uni) when ?CHAR(C), ?UNI255(C) -> + scan_string1(Cs, Line, Col+1, Q, U, [C|Str], [C|Wcs], Uni); +scan_string1([C|Cs], Line, Col, _Q, false, _Str, _Wcs, _Uni) when ?CHAR(C) -> %' UNI {char_error,Cs,{illegal,character},Line,Col,incr_column(Col, 1)}; -scan_string1([C|Cs], Line, Col, Q, Str, Wcs, _Uni) when ?CHAR(C) -> % UNI - scan_string1(Cs, Line, incr_column(Col, 1), Q, [C|Str], [C|Wcs], C); -scan_string1([]=Cs, Line, Col, _Q, Str, Wcs, Uni) -> +scan_string1([C|Cs], Line, Col, Q, U, Str, Wcs, _Uni) when ?UNICODE(C) -> + scan_string1(Cs, Line, incr_column(Col, 1), Q, U, [C|Str], [C|Wcs], C); +scan_string1([C|Cs], Line, Col, _Q, _U, _Str, _Wcs, _Uni) when ?CHAR(C) -> % UNI + {char_error,Cs,{illegal,character},Line,Col,incr_column(Col, 1)}; +scan_string1([]=Cs, Line, Col, _Q, _U, Str, Wcs, Uni) -> {more,Cs,Line,Col,Str,Wcs,Uni}; -scan_string1(eof, Line, Col, _Q, _Str, Wcs, _Uni) -> +scan_string1(eof, Line, Col, _Q, _U, _Str, Wcs, _Uni) -> {error,Line,Col,lists:reverse(Wcs),eof}. -define(OCT(C), C >= $0, C =< $7). @@ -1072,8 +1111,10 @@ scan_escape([$\n=C|Cs], Col) -> scan_escape([C0|Cs], Col) when ?CHAR(C0), ?UNI255(C0) -> C = escape_char(C0), {C,?UNI_STR(Col, [C0]),Cs,incr_column(Col, 1)}; -scan_escape([C|Cs], Col) when ?CHAR(C) -> % UNI +scan_escape([C|Cs], Col) when ?UNICODE(C) -> {unicode,C,?UNI_STR(Col, [C]),Cs,incr_column(Col, 1)}; +scan_escape([C|Cs], Col) when ?CHAR(C) -> % UNI + {error,Cs,{illegal,character},incr_column(Col, 1)}; scan_escape([], _Col) -> more; scan_escape(eof, Col) -> @@ -1091,7 +1132,7 @@ scan_esc_end([$}|Cs], Col, Wcs0, B, Str0) -> case catch erlang:list_to_integer(Wcs, B) of Val when Val =< 16#FF -> {Val,?UNI_STR(Col, Str0++Wcs++[$}]),Cs,incr_column(Col, 1)}; - Val when Val =< 16#10FFFF -> + Val when ?UNICODE(Val) -> {unicode,Val,?UNI_STR(Col, Str0++Wcs++[$}]),Cs,incr_column(Col,1)}; _ -> {error,Cs,{illegal,character},incr_column(Col, 1)} @@ -1197,18 +1238,36 @@ float_end(Cs, St, Line, Col, Toks, Ncs0) -> scan_error({illegal,float}, Line, Col, Line, Ncol, Cs) end. -skip_comment([C|Cs], St, Line, Col, Toks, N) when C =/= $\n, ?CHAR(C) -> - skip_comment(Cs, St, Line, Col, Toks, N+1); -skip_comment([]=Cs, _St, Line, Col, Toks, N) -> - {more,{Cs,Col,Toks,Line,N,fun skip_comment/6}}; skip_comment(Cs, St, Line, Col, Toks, N) -> + skip_comment(Cs, St, Line, Col, Toks, N, St#erl_scan.unicode). + +skip_comment([C|Cs], St, Line, Col, Toks, N, U) when C =/= $\n, ?CHAR(C) -> + case ?UNI255(C) orelse U andalso ?UNICODE(C) of + true -> + skip_comment(Cs, St, Line, Col, Toks, N+1, U); + false -> + Ncol = incr_column(Col, N+1), + scan_error({illegal,character}, Line, Col, Line, Ncol, Cs) + end; +skip_comment([]=Cs, _St, Line, Col, Toks, N, _U) -> + {more,{Cs,Col,Toks,Line,N,fun skip_comment/6}}; +skip_comment(Cs, St, Line, Col, Toks, N, _U) -> scan1(Cs, St, Line, incr_column(Col, N), Toks). -scan_comment([C|Cs], St, Line, Col, Toks, Ncs) when C =/= $\n, ?CHAR(C) -> - scan_comment(Cs, St, Line, Col, Toks, [C|Ncs]); -scan_comment([]=Cs, _St, Line, Col, Toks, Ncs) -> +scan_comment(Cs, St, Line, Col, Toks, Ncs) -> + scan_comment(Cs, St, Line, Col, Toks, Ncs, St#erl_scan.unicode). + +scan_comment([C|Cs], St, Line, Col, Toks, Ncs, U) when C =/= $\n, ?CHAR(C) -> + case ?UNI255(C) orelse U andalso ?UNICODE(C) of + true -> + scan_comment(Cs, St, Line, Col, Toks, [C|Ncs], U); + false -> + Ncol = incr_column(Col, length(Ncs)+1), + scan_error({illegal,character}, Line, Col, Line, Ncol, Cs) + end; +scan_comment([]=Cs, _St, Line, Col, Toks, Ncs, _U) -> {more,{Cs,Col,Toks,Line,Ncs,fun scan_comment/6}}; -scan_comment(Cs, St, Line, Col, Toks, Ncs0) -> +scan_comment(Cs, St, Line, Col, Toks, Ncs0, _U) -> Ncs = lists:reverse(Ncs0), tok3(Cs, St, Line, Col, Toks, comment, Ncs, Ncs). |