diff options
Diffstat (limited to 'lib/stdlib')
| -rw-r--r-- | lib/stdlib/doc/src/unicode_usage.xml | 31 | ||||
| -rw-r--r-- | lib/stdlib/src/erl_lint.erl | 15 | ||||
| -rw-r--r-- | lib/stdlib/test/erl_lint_SUITE.erl | 23 |
3 files changed, 53 insertions, 16 deletions
diff --git a/lib/stdlib/doc/src/unicode_usage.xml b/lib/stdlib/doc/src/unicode_usage.xml index efc8b75075..a8ef8ff5c5 100644 --- a/lib/stdlib/doc/src/unicode_usage.xml +++ b/lib/stdlib/doc/src/unicode_usage.xml @@ -62,6 +62,10 @@ <item><p>In Erlang/OTP 17.0, the encoding default for Erlang source files was switched to UTF-8.</p></item> + + <item><p>In Erlang/OTP 20.0, atoms and function can contain + Unicode characters. Module names are still restricted to + the ISO-Latin-1 range.</p></item> </list> <p>This section outlines the current Unicode support and gives some @@ -339,9 +343,10 @@ <tag>The language</tag> <item> <p>Having the source code in UTF-8 also allows you to write string - literals containing Unicode characters with code points > 255, - although atoms, module names, and function names are restricted to - the ISO Latin-1 range. Binary literals, where you use type + literals, function names, and atoms containing Unicode + characters with code points > 255. + Module names are still restricted to the ISO Latin-1 range. + Binary literals, where you use type <c>/utf8</c>, can also be expressed using Unicode characters > 255. Having module names using characters other than 7-bit ASCII can cause trouble on operating systems with inconsistent file naming schemes, @@ -432,15 +437,17 @@ external_charlist() = maybe_improper_list(char() | external_unicode_binary() | <section> <title>Basic Language Support</title> - <p><marker id="unicode_in_erlang"/>As from Erlang/OTP R16, Erlang source - files can be written in UTF-8 or bytewise (<c>latin1</c>) encoding. For - information about how to state the encoding of an Erlang source file, see - the <seealso marker="stdlib:epp#encoding"><c>epp(3)</c></seealso> module. - Strings and comments can be written using Unicode, but functions must - still be named using characters from the ISO Latin-1 character set, and - atoms are restricted to the same ISO Latin-1 range. These restrictions in - the language are of course independent of the encoding of the source - file.</p> + <p><marker id="unicode_in_erlang"/>As from Erlang/OTP R16, Erlang + source files can be written in UTF-8 or bytewise (<c>latin1</c>) + encoding. For information about how to state the encoding of an + Erlang source file, see the <seealso + marker="stdlib:epp#encoding"><c>epp(3)</c></seealso> module. As + from Erlang/OTP R16, strings and comments can be written using + Unicode. As from Erlang/OTP 20, also atoms and functions can be + written using Unicode. Modules names must still be named using + characters from the ISO Latin-1 character set. (These + restrictions in the language are independent of the encoding of + the source file.)</p> <section> <title>Bit Syntax</title> diff --git a/lib/stdlib/src/erl_lint.erl b/lib/stdlib/src/erl_lint.erl index 0ffca0886f..0789f5dfb7 100644 --- a/lib/stdlib/src/erl_lint.erl +++ b/lib/stdlib/src/erl_lint.erl @@ -156,6 +156,8 @@ format_error(pmod_unsupported) -> "parameterized modules are no longer supported"; %% format_error({redefine_mod_import, M, P}) -> %% io_lib:format("module '~s' already imported from package '~s'", [M, P]); +format_error(non_latin1_module_unsupported) -> + "module names with non-latin1 characters are not supported"; format_error(invalid_call) -> "invalid function call"; @@ -733,9 +735,15 @@ form(Form, #lint{state=State}=St) -> start_state({attribute,Line,module,{_,_}}=Form, St0) -> St1 = add_error(Line, pmod_unsupported, St0), attribute_state(Form, St1#lint{state=attribute}); -start_state({attribute,_,module,M}, St0) -> +start_state({attribute,Line,module,M}, St0) -> St1 = St0#lint{module=M}, - St1#lint{state=attribute}; + St2 = St1#lint{state=attribute}, + case is_non_latin1_name(M) of + true -> + add_error(Line, non_latin1_module_unsupported, St2); + false -> + St2 + end; start_state(Form, St) -> Anno = case Form of {eof, L} -> erl_anno:new(L); @@ -745,6 +753,9 @@ start_state(Form, St) -> St1 = add_error(Anno, undefined_module, St), attribute_state(Form, St1#lint{state=attribute}). +is_non_latin1_name(Name) -> + lists:any(fun(C) -> C > 255 end, atom_to_list(Name)). + %% attribute_state(Form, State) -> %% State' diff --git a/lib/stdlib/test/erl_lint_SUITE.erl b/lib/stdlib/test/erl_lint_SUITE.erl index df38edf393..4af1c26c0f 100644 --- a/lib/stdlib/test/erl_lint_SUITE.erl +++ b/lib/stdlib/test/erl_lint_SUITE.erl @@ -64,7 +64,8 @@ predef/1, maps/1,maps_type/1,maps_parallel_match/1, otp_11851/1,otp_11879/1,otp_13230/1, - record_errors/1, otp_xxxxx/1]). + record_errors/1, otp_xxxxx/1, + non_latin1_module/1]). suite() -> [{ct_hooks,[ts_install_cth]}, @@ -84,7 +85,7 @@ all() -> too_many_arguments, basic_errors, bin_syntax_errors, predef, maps, maps_type, maps_parallel_match, otp_11851, otp_11879, otp_13230, - record_errors, otp_xxxxx]. + record_errors, otp_xxxxx, non_latin1_module]. groups() -> [{unused_vars_warn, [], @@ -3923,6 +3924,24 @@ otp_xxxxx(Config) -> []}], run(Config, Ts). +%% OTP-14285: We currently don't support non-latin1 module names. + +non_latin1_module(_Config) -> + do_non_latin1_module('юникод'), + do_non_latin1_module(list_to_atom([256,$a,$b,$c])), + do_non_latin1_module(list_to_atom([$a,$b,256,$c])), + ok. + +do_non_latin1_module(Mod) -> + File = atom_to_list(Mod) ++ ".erl", + Forms = [{attribute,1,file,{File,1}}, + {attribute,1,module,Mod}, + {eof,2}], + error = compile:forms(Forms), + {error,_,[]} = compile:forms(Forms, [return]), + ok. + + run(Config, Tests) -> F = fun({N,P,Ws,E}, BadL) -> case catch run_test(Config, P, Ws) of |