[SELF-INCOMPATIBLE] main: make NONE a reserved language name

Signed-off-by: Masatake YAMATO <[email protected]>

Author: masatake

Tmain/broken-langdef.d/run.sh

@@ -13,6 +13,7 @@ run_ctags()
 
 run_ctags ""
 run_ctags all
+run_ctags NONE
 for c in '!' '"' '$' '%' '&' "'" '(' ')' '*' ',' '-' '.' '/' ':' ';' '<' '=' '>' '?' '@' '[' '\' ']' '^' '`' '|' '~'; do
 	run_ctags "C$c"
 done

Tmain/broken-langdef.d/stderr-expected.txt

@@ -2,6 +2,8 @@
 ctags: No language specified for "langdef" option
 # all
 ctags: "all" is reserved; don't use it as the name for defining a new language
+# NONE
+ctags: "NONE" is reserved; don't use it as the name for defining a new language
 # C!
 ctags: don't use `!' in a language name (C!)
 # C"

docs/man/ctags-optlib.7.rst

@@ -143,6 +143,8 @@ OPTIONS
 	``--kinds-(<LANG>|all)=[+|-](<kinds>|*)`` option in :ref:`ctags(1) <ctags(1)>` about how the
 	reserved word is used.
 
+	``NONE`` is another exception. ``NONE`` as *<name>* is not acceptable.
+
 	The names of built-in parsers are capitalized. When
 	ctags evaluates an option in a command line, and
 	chooses a parser, ctags uses the names of

main/parse.c

@@ -2263,6 +2263,12 @@ extern void processLanguageDefineOption (
 		eFree (name);
 		error (FATAL, "\"" RSV_LANG_ALL "\" is reserved; don't use it as the name for defining a new language");
 	}
+	else if (strcmp(name, RSV_NONE) == 0)
+	{
+		eFree (name);
+		error (FATAL, "\"" RSV_NONE "\" is reserved; don't use it as the name for defining a new language");
+
+	}
 	else if ((unacceptable = strpbrk (name, "!\"$%&'()*,-./:;<=>?@[\\]^`|~")))
 	{
 		char c = *unacceptable;

man/ctags-optlib.7.rst.in

@@ -143,6 +143,8 @@ OPTIONS
 	``--kinds-(<LANG>|all)=[+|-](<kinds>|*)`` option in ctags(1) about how the
 	reserved word is used.
 
+	``NONE`` is another exception. ``NONE`` as *<name>* is not acceptable.
+
 	The names of built-in parsers are capitalized. When
 	@CTAGS_NAME_EXECUTABLE@ evaluates an option in a command line, and
 	chooses a parser, @CTAGS_NAME_EXECUTABLE@ uses the names of

misc/optlib2c

@@ -58,6 +58,8 @@ my $options =
 	       if (defined $_[0]->{'langdef'});
 	   die "Don't use \"all\" as a language name. It is reserved word."
 	       if ($1 eq "all");
+	   die "Don't use \"all\" as a language name. It is reserved word."
+	       if ($1 eq "NONE");
 
 	   $_[0]->{'langdef'} = $1;
 	   $_[0]->{'base'} = $5 if defined $5;