Comment changes.

[bison.git] / src / symtab.c

diff --git a/src/symtab.c b/src/symtab.c
index b2ffc216409c3c8751f7810283c36b039986be8a..13b755491ce74aba30938379b3e73bff6783265f 100644 (file)
--- a/src/symtab.c
+++ b/src/symtab.c
@@ -1,24 +1,22 @@
 /* Symbol table manager for Bison.
 
 /* Symbol table manager for Bison.
 

-   Copyright (C) 1984, 1989, 2000, 2001, 2002, 2004, 2005, 2006 Free
-   Software Foundation, Inc.
+   Copyright (C) 1984, 1989, 2000, 2001, 2002, 2004, 2005, 2006, 2007, 2008
+   Free Software Foundation, Inc.

 
    This file is part of Bison, the GNU Compiler Compiler.
 
 
    This file is part of Bison, the GNU Compiler Compiler.
 

-   Bison is free software; you can redistribute it and/or modify
+   This program is free software: you can redistribute it and/or modify

    it under the terms of the GNU General Public License as published by
    it under the terms of the GNU General Public License as published by

-   the Free Software Foundation; either version 2, or (at your option)
-   any later version.
+   the Free Software Foundation, either version 3 of the License, or
+   (at your option) any later version.

 
 

-   Bison is distributed in the hope that it will be useful,
+   This program is distributed in the hope that it will be useful,

    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.
 
    You should have received a copy of the GNU General Public License
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.
 
    You should have received a copy of the GNU General Public License

-   along with Bison; see the file COPYING.  If not, write to
-   the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
-   Boston, MA 02110-1301, USA.  */
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */

 
 #include <config.h>
 #include "system.h"
 
 #include <config.h>
 #include "system.h"


@@ -45,15 +43,10 @@ location startsymbol_location;
 | Default %destructor's and %printer's.  |
 `---------------------------------------*/
 
 | Default %destructor's and %printer's.  |
 `---------------------------------------*/
 

-static const char *default_tagged_destructor = NULL;
-static location default_tagged_destructor_location;
-static const char *default_tagless_destructor = NULL;
-static location default_tagless_destructor_location;
-
-static const char *default_tagged_printer = NULL;
-static location default_tagged_printer_location;
-static const char *default_tagless_printer = NULL;
-static location default_tagless_printer_location;
+static code_props default_tagged_destructor = CODE_PROPS_NONE_INIT;
+static code_props default_tagless_destructor = CODE_PROPS_NONE_INIT;
+static code_props default_tagged_printer = CODE_PROPS_NONE_INIT;
+static code_props default_tagless_printer = CODE_PROPS_NONE_INIT;

 
 /*---------------------------------.
 | Create a new symbol, named TAG.  |
 
 /*---------------------------------.
 | Create a new symbol, named TAG.  |


@@ -69,8 +62,8 @@ symbol_new (uniqstr tag, location loc)
   res->location = loc;
 
   res->type_name = NULL;
   res->location = loc;
 
   res->type_name = NULL;

-  res->destructor = NULL;
-  res->printer = NULL;
+  code_props_none_init (&res->destructor);
+  code_props_none_init (&res->printer);

 
   res->number = NUMBER_UNDEFINED;
   res->prec = 0;
 
   res->number = NUMBER_UNDEFINED;
   res->prec = 0;


@@ -99,8 +92,8 @@ semantic_type_new (uniqstr tag)
 
   uniqstr_assert (tag);
   res->tag = tag;
 
   uniqstr_assert (tag);
   res->tag = tag;

-  res->destructor = NULL;
-  res->printer = NULL;
+  code_props_none_init (&res->destructor);
+  code_props_none_init (&res->printer);

 
   return res;
 }
 
   return res;
 }


@@ -114,6 +107,10 @@ semantic_type_new (uniqstr tag)
   if (s->Attr)                                         \
     fprintf (f, " %s { %s }", #Attr, s->Attr)
 
   if (s->Attr)                                         \
     fprintf (f, " %s { %s }", #Attr, s->Attr)
 

+#define SYMBOL_CODE_PRINT(Attr)                         \
+  if (s->Attr.code)                                     \
+    fprintf (f, " %s { %s }", #Attr, s->Attr.code)
+

 void
 symbol_print (symbol *s, FILE *f)
 {
 void
 symbol_print (symbol *s, FILE *f)
 {


@@ -121,14 +118,15 @@ symbol_print (symbol *s, FILE *f)
     {
       fprintf (f, "\"%s\"", s->tag);
       SYMBOL_ATTR_PRINT (type_name);
     {
       fprintf (f, "\"%s\"", s->tag);
       SYMBOL_ATTR_PRINT (type_name);

-      SYMBOL_ATTR_PRINT (destructor);
-      SYMBOL_ATTR_PRINT (printer);
+      SYMBOL_CODE_PRINT (destructor);
+      SYMBOL_CODE_PRINT (printer);

     }
   else
     fprintf (f, "<NULL>");
 }
 
 #undef SYMBOL_ATTR_PRINT
     }
   else
     fprintf (f, "<NULL>");
 }
 
 #undef SYMBOL_ATTR_PRINT

+#undef SYMBOL_CODE_PRINT

 
 /*------------------------------------------------------------------.
 | Complain that S's WHAT is redeclared at SECOND, and was first set |
 
 /*------------------------------------------------------------------.
 | Complain that S's WHAT is redeclared at SECOND, and was first set |


@@ -170,171 +168,135 @@ symbol_type_set (symbol *sym, uniqstr type_name, location loc)
     }
 }
 
     }
 }
 

+/*-----------------------------------.
+| Get the CLASS associated with SYM. |
+`-----------------------------------*/

 
 

-/*------------------------------------------------------------------.
-| Set the DESTRUCTOR associated with SYM.  Do nothing if passed 0.  |
-`------------------------------------------------------------------*/
-
-void
-symbol_destructor_set (symbol *sym, const char *destructor, location loc)
+const char *
+symbol_class_get_string (symbol *sym)

 {
 {

-  if (destructor)
+  if (sym->class)

     {
     {

-      if (sym->destructor)
-       symbol_redeclaration (sym, "%destructor", sym->destructor_location,
-                              loc);
-      sym->destructor = destructor;
-      sym->destructor_location = loc;
+      if (sym->class == token_sym)
+       return "terminal";
+      else if (sym->class == nterm_sym)
+       return "nonterminal";

     }
     }

+  return "unknown";

 }
 
 }
 

-/*-------------------------------------------------------------------.
-| Set the DESTRUCTOR associated with TYPE.  Do nothing if passed 0.  |
-`-------------------------------------------------------------------*/
+
+/*-----------------------------------------.
+| Set the DESTRUCTOR associated with SYM.  |
+`-----------------------------------------*/

 
 void
 
 void

-semantic_type_destructor_set (semantic_type *type, const char *destructor,
-                              location loc)
+symbol_destructor_set (symbol *sym, code_props const *destructor)

 {
 {

-  if (destructor)
-    {
-      if (type->destructor)
-       semantic_type_redeclaration (type, "%destructor",
-                                     type->destructor_location, loc);
-      type->destructor = destructor;
-      type->destructor_location = loc;
-    }
+  if (sym->destructor.code)
+    symbol_redeclaration (sym, "%destructor", sym->destructor.location,
+                          destructor->location);
+  sym->destructor = *destructor;
+}
+
+/*------------------------------------------.
+| Set the DESTRUCTOR associated with TYPE.  |
+`------------------------------------------*/
+
+void
+semantic_type_destructor_set (semantic_type *type,
+                              code_props const *destructor)
+{
+  if (type->destructor.code)
+    semantic_type_redeclaration (type, "%destructor",
+                                 type->destructor.location,
+                                 destructor->location);
+  type->destructor = *destructor;

 }
 
 /*---------------------------------------.
 | Get the computed %destructor for SYM.  |
 `---------------------------------------*/
 
 }
 
 /*---------------------------------------.
 | Get the computed %destructor for SYM.  |
 `---------------------------------------*/
 

-const char *
-symbol_destructor_get (symbol *sym)
+code_props const *
+symbol_destructor_get (symbol const *sym)

 {
   /* Per-symbol %destructor.  */
 {
   /* Per-symbol %destructor.  */

-  if (sym->destructor != NULL)
-    return sym->destructor;
+  if (sym->destructor.code)
+    return &sym->destructor;

 
   /* Per-type %destructor.  */
   if (sym->type_name)
     {
 
   /* Per-type %destructor.  */
   if (sym->type_name)
     {

-      semantic_type *type = semantic_type_get (sym->type_name);
-      if (type->destructor)
-        return type->destructor;
+      code_props const *destructor =
+        &semantic_type_get (sym->type_name)->destructor;
+      if (destructor->code)
+        return destructor;

     }
 
   /* Apply default %destructor's only to user-defined symbols.  */
   if (sym->tag[0] == '$' || sym == errtoken)
     }
 
   /* Apply default %destructor's only to user-defined symbols.  */
   if (sym->tag[0] == '$' || sym == errtoken)

-    return NULL;
-
-  if (sym->type_name)
-    return default_tagged_destructor;
-  return default_tagless_destructor;
-}
-
-/*---------------------------------------------------------------.
-| Get the grammar location of the %destructor computed for SYM.  |
-`---------------------------------------------------------------*/
+    return &code_props_none;

 
 

-location
-symbol_destructor_location_get (symbol *sym)
-{
-  if (sym->destructor != NULL)
-    return sym->destructor_location;

   if (sym->type_name)
   if (sym->type_name)

-    {
-      semantic_type *type = semantic_type_get (sym->type_name);
-      if (type->destructor)
-        return type->destructor_location;
-      return default_tagged_destructor_location;
-    }
-  return default_tagless_destructor_location;
+    return &default_tagged_destructor;
+  return &default_tagless_destructor;

 }
 
 }
 

-/*---------------------------------------------------------------.
-| Set the PRINTER associated with SYM.  Do nothing if passed 0.  |
-`---------------------------------------------------------------*/
+/*--------------------------------------.
+| Set the PRINTER associated with SYM.  |
+`--------------------------------------*/

 
 void
 
 void

-symbol_printer_set (symbol *sym, const char *printer, location loc)
+symbol_printer_set (symbol *sym, code_props const *printer)

 {
 {

-  if (printer)
-    {
-      if (sym->printer)
-       symbol_redeclaration (sym, "%printer", sym->printer_location, loc);
-      sym->printer = printer;
-      sym->printer_location = loc;
-    }
+  if (sym->printer.code)
+    symbol_redeclaration (sym, "%printer",
+                          sym->printer.location, printer->location);
+  sym->printer = *printer;

 }
 
 }
 

-/*----------------------------------------------------------------.
-| Set the PRINTER associated with TYPE.  Do nothing if passed 0.  |
-`----------------------------------------------------------------*/
+/*---------------------------------------.
+| Set the PRINTER associated with TYPE.  |
+`---------------------------------------*/

 
 void
 
 void

-semantic_type_printer_set (semantic_type *type, const char *printer,
-                           location loc)
+semantic_type_printer_set (semantic_type *type, code_props const *printer)

 {
 {

-  if (printer)
-    {
-      if (type->printer)
-       semantic_type_redeclaration (type, "%printer", type->printer_location,
-                                     loc);
-      type->printer = printer;
-      type->printer_location = loc;
-    }
+  if (type->printer.code)
+    semantic_type_redeclaration (type, "%printer",
+                                 type->printer.location, printer->location);
+  type->printer = *printer;

 }
 
 /*------------------------------------.
 | Get the computed %printer for SYM.  |
 `------------------------------------*/
 
 }
 
 /*------------------------------------.
 | Get the computed %printer for SYM.  |
 `------------------------------------*/
 

-const char *
-symbol_printer_get (symbol *sym)
+code_props const *
+symbol_printer_get (symbol const *sym)

 {
   /* Per-symbol %printer.  */
 {
   /* Per-symbol %printer.  */

-  if (sym->printer != NULL)
-    return sym->printer;
+  if (sym->printer.code)
+    return &sym->printer;

 
   /* Per-type %printer.  */
   if (sym->type_name)
     {
 
   /* Per-type %printer.  */
   if (sym->type_name)
     {

-      semantic_type *type = semantic_type_get (sym->type_name);
-      if (type->printer)
-        return type->printer;
+      code_props const *printer = &semantic_type_get (sym->type_name)->printer;
+      if (printer->code)
+        return printer;

     }
 
   /* Apply the default %printer only to user-defined symbols.  */
   if (sym->tag[0] == '$' || sym == errtoken)
     }
 
   /* Apply the default %printer only to user-defined symbols.  */
   if (sym->tag[0] == '$' || sym == errtoken)

-    return NULL;
-
-  if (sym->type_name)
-    return default_tagged_printer;
-  return default_tagless_printer;
-}
+    return &code_props_none;

 
 

-/*------------------------------------------------------------.
-| Get the grammar location of the %printer computed for SYM.  |
-`------------------------------------------------------------*/
-
-location
-symbol_printer_location_get (symbol *sym)
-{
-  if (sym->printer != NULL)
-    return sym->printer_location;

   if (sym->type_name)
   if (sym->type_name)

-    {
-      semantic_type *type = semantic_type_get (sym->type_name);
-      if (type->printer)
-        return type->printer_location;
-      return default_tagged_printer_location;
-    }
-  return default_tagless_printer_location;
+    return &default_tagged_printer;
+  return &default_tagless_printer;

 }
 
 }
 

-

 /*-----------------------------------------------------------------.
 | Set the PRECEDENCE associated with SYM.  Does nothing if invoked |
 | with UNDEF_ASSOC as ASSOC.                                       |
 /*-----------------------------------------------------------------.
 | Set the PRECEDENCE associated with SYM.  Does nothing if invoked |
 | with UNDEF_ASSOC as ASSOC.                                       |


@@ -396,8 +358,6 @@ symbol_user_token_number_set (symbol *sym, int user_token_number, location loc)
 {
   int *user_token_numberp;
 
 {
   int *user_token_numberp;
 

-  aver (sym->class == token_sym);
-

   if (sym->user_token_number != USER_NUMBER_ALIAS)
     user_token_numberp = &sym->user_token_number;
   else
   if (sym->user_token_number != USER_NUMBER_ALIAS)
     user_token_numberp = &sym->user_token_number;
   else


@@ -498,22 +458,20 @@ symbol_check_alias_consistency (symbol *this)
     }
 
 
     }
 
 

-  if (orig->destructor || alias->destructor)
+  if (orig->destructor.code || alias->destructor.code)

     {
     {

-      if (orig->destructor)
-       symbol_destructor_set (alias, orig->destructor,
-                              orig->destructor_location);
+      if (orig->destructor.code)
+       symbol_destructor_set (alias, &orig->destructor);

       else
       else

-       symbol_destructor_set (orig, alias->destructor,
-                              alias->destructor_location);
+       symbol_destructor_set (orig, &alias->destructor);

     }
 
     }
 

-  if (orig->printer || alias->printer)
+  if (orig->printer.code || alias->printer.code)

     {
     {

-      if (orig->printer)
-       symbol_printer_set (alias, orig->printer, orig->printer_location);
+      if (orig->printer.code)
+       symbol_printer_set (alias, &orig->printer);

       else
       else

-       symbol_printer_set (orig, alias->printer, alias->printer_location);
+       symbol_printer_set (orig, &alias->printer);

     }
 
   if (alias->prec || orig->prec)
     }
 
   if (alias->prec || orig->prec)


@@ -878,9 +836,8 @@ symbols_token_translations_init (void)
   token_translations = xnmalloc (max_user_token_number + 1,
                                 sizeof *token_translations);
 
   token_translations = xnmalloc (max_user_token_number + 1,
                                 sizeof *token_translations);
 

-  /* Initialize all entries for literal tokens to 2, the internal
-     token number for $undefined, which represents all invalid inputs.
-     */
+  /* Initialize all entries for literal tokens to the internal token
+     number for $undefined, which represents all invalid inputs.  */

   for (i = 0; i < max_user_token_number + 1; i++)
     token_translations[i] = undeftoken->number;
   symbols_do (symbol_translation_processor, NULL);
   for (i = 0; i < max_user_token_number + 1; i++)
     token_translations[i] = undeftoken->number;
   symbols_do (symbol_translation_processor, NULL);


@@ -942,53 +899,53 @@ symbols_pack (void)
 `--------------------------------------------------*/
 
 void
 `--------------------------------------------------*/
 
 void

-default_tagged_destructor_set (const char *destructor, location loc)
+default_tagged_destructor_set (code_props const *destructor)

 {
 {

-  if (default_tagged_destructor != NULL)
+  if (default_tagged_destructor.code)

     {
     {

-      complain_at (loc, _("redeclaration for default tagged %%destructor"));
-      complain_at (default_tagged_destructor_location,
+      complain_at (destructor->location,
+                   _("redeclaration for default tagged %%destructor"));
+      complain_at (default_tagged_destructor.location,

                   _("previous declaration"));
     }
                   _("previous declaration"));
     }

-  default_tagged_destructor = destructor;
-  default_tagged_destructor_location = loc;
+  default_tagged_destructor = *destructor;

 }
 
 void
 }
 
 void

-default_tagless_destructor_set (const char *destructor, location loc)
+default_tagless_destructor_set (code_props const *destructor)

 {
 {

-  if (default_tagless_destructor != NULL)
+  if (default_tagless_destructor.code)

     {
     {

-      complain_at (loc, _("redeclaration for default tagless %%destructor"));
-      complain_at (default_tagless_destructor_location,
+      complain_at (destructor->location,
+                   _("redeclaration for default tagless %%destructor"));
+      complain_at (default_tagless_destructor.location,

                   _("previous declaration"));
     }
                   _("previous declaration"));
     }

-  default_tagless_destructor = destructor;
-  default_tagless_destructor_location = loc;
+  default_tagless_destructor = *destructor;

 }
 
 void
 }
 
 void

-default_tagged_printer_set (const char *printer, location loc)
+default_tagged_printer_set (code_props const *printer)

 {
 {

-  if (default_tagged_printer != NULL)
+  if (default_tagged_printer.code)

     {
     {

-      complain_at (loc, _("redeclaration for default tagged %%printer"));
-      complain_at (default_tagged_printer_location,
+      complain_at (printer->location,
+                   _("redeclaration for default tagged %%printer"));
+      complain_at (default_tagged_printer.location,

                   _("previous declaration"));
     }
                   _("previous declaration"));
     }

-  default_tagged_printer = printer;
-  default_tagged_printer_location = loc;
+  default_tagged_printer = *printer;

 }
 
 void
 }
 
 void

-default_tagless_printer_set (const char *printer, location loc)
+default_tagless_printer_set (code_props const *printer)

 {
 {

-  if (default_tagless_printer != NULL)
+  if (default_tagless_printer.code)

     {
     {

-      complain_at (loc, _("redeclaration for default tagless %%printer"));
-      complain_at (default_tagless_printer_location,
+      complain_at (printer->location,
+                   _("redeclaration for default tagless %%printer"));
+      complain_at (default_tagless_printer.location,

                   _("previous declaration"));
     }
                   _("previous declaration"));
     }

-  default_tagless_printer = printer;
-  default_tagless_printer_location = loc;
+  default_tagless_printer = *printer;

 }
 }