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-rw-r--r--lib/stdlib/doc/src/unicode_usage.xml31
-rw-r--r--lib/stdlib/src/erl_lint.erl15
-rw-r--r--lib/stdlib/test/erl_lint_SUITE.erl23
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 &gt; 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 &gt; 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 &gt; 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