lex.c (real_yylex): Treat `$' just like `_'...

1997-09-29  Paul Eggert  <eggert@twinsun.com>

	* lex.c (real_yylex): Treat `$' just like `_', except issue a
	diagnostic if !dollars_in_ident or if pedantic.

	* lang-specs.h (@c++): -ansi no longer implies -$.

	* decl2.c (lang_decode_option):
	-traditional and -ansi now do not mess with
	dollars_in_ident.

From-SVN: r15802

gcc/cp/ChangeLog

+1997-09-29  Paul Eggert  <eggert@twinsun.com>
+
+	* lex.c (real_yylex): Treat `$' just like `_', except issue a
+	diagnostic if !dollars_in_ident or if pedantic.
+
+	* lang-specs.h (@c++): -ansi no longer implies -$.
+
+	* decl2.c (lang_decode_option):
+	-traditional and -ansi now do not mess with
+	dollars_in_ident.
+
 Mon Sep 29 19:57:51 1997  H.J. Lu  (hjl@gnu.ai.mit.edu)
 
 	* Makefile.in (parse.o, decl.o): Also depend on

gcc/cp/decl2.c

@@ -271,8 +271,7 @@ int warn_sign_promo;
 
 int warn_old_style_cast;
 
-/* Nonzero means `$' can be in an identifier.
-   See cccp.c for reasons why this breaks some obscure ANSI C programs.  */
+/* Nonzero means `$' can be in an identifier.  */
 
 #ifndef DOLLARS_IN_IDENTIFIERS
 #define DOLLARS_IN_IDENTIFIERS 1
@@ -476,7 +475,7 @@ lang_decode_option (p)
      char *p;
 {
   if (!strcmp (p, "-ftraditional") || !strcmp (p, "-traditional"))
-    dollars_in_ident = 1, flag_writable_strings = 1,
+    flag_writable_strings = 1,
     flag_this_is_variable = 1, flag_new_for_scope = 0;
   /* The +e options are for cfront compatibility.  They come in as
      `-+eN', to kludge around gcc.c's argument handling.  */
@@ -690,7 +689,7 @@ lang_decode_option (p)
       else return 0;
     }
   else if (!strcmp (p, "-ansi"))
-    dollars_in_ident = 0, flag_no_nonansi_builtin = 1, flag_ansi = 1,
+    flag_no_nonansi_builtin = 1, flag_ansi = 1,
     flag_no_gnu_keywords = 1, flag_operator_names = 1;
 #ifdef SPEW_DEBUG
   /* Undocumented, only ever used when you're invoking cc1plus by hand, since

gcc/cp/lang-specs.h

@@ -32,7 +32,7 @@ Boston, MA 02111-1307, USA.  */
 	%{C:%{!E:%eGNU C++ does not support -C without using -E}}\
 	%{M} %{MM} %{MD:-MD %b.d} %{MMD:-MMD %b.d} %{MG}\
 	-undef -D__GNUC__=%v1 -D__GNUG__=%v1 -D__cplusplus -D__GNUC_MINOR__=%v2\
-	%{ansi:-trigraphs -$ -D__STRICT_ANSI__} %{!undef:%{!ansi:%p} %P}\
+	%{ansi:-trigraphs -D__STRICT_ANSI__} %{!undef:%{!ansi:%p} %P}\
 	%{!fno-exceptions:-D__EXCEPTIONS}\
         %c %{O*:%{!O0:-D__OPTIMIZE__}} %{trigraphs}\
 	%{g*} %{W*} %{w} %{pedantic*} %{H} %{d*} %C %{D*} %{U*} %{i*} %Z\

gcc/cp/lex.c

@@ -3095,13 +3095,12 @@ real_yylex ()
       break;
 
     case '$':
-      if (dollars_in_ident)
-	{
-	  dollar_seen = 1;
-	  goto letter;
-	}
-      value = '$';
-      goto done;
+      if (! dollars_in_ident)
+	error ("`$' in identifier");
+      else if (pedantic)
+	pedwarn ("`$' in identifier");
+      dollar_seen = 1;
+      goto letter;
 
     case 'L':
       /* Capital L may start a wide-string or wide-character constant.  */
@@ -3152,8 +3151,14 @@ real_yylex ()
 	       input sources.  */
 	    while (isalnum (c) || (c == '_') || c == '$')
 	      {
-		if (c == '$' && ! dollars_in_ident)
-		  break;
+		if (c == '$')
+		  {
+		    if (! dollars_in_ident)
+		      error ("`$' in identifier");
+		    else if (pedantic)
+		      pedwarn ("`$' in identifier");
+		  }
+
 		if (p >= token_buffer + maxtoken)
 		  p = extend_token_buffer (p);
 
@@ -3176,8 +3181,14 @@ real_yylex ()
 
 	    while (isalnum (c) || (c == '_') || c == '$')
 	      {
-		if (c == '$' && ! dollars_in_ident)
-		  break;
+		if (c == '$')
+		  {
+		    if (! dollars_in_ident)
+		      error ("`$' in identifier");
+		    else if (pedantic)
+		      pedwarn ("`$' in identifier");
+		  }
+
 		if (p >= token_buffer + maxtoken)
 		  p = extend_token_buffer (p);