Adjust to renamings.

[bison.git] / src / symtab.c

diff --git a/src/symtab.c b/src/symtab.c
index 217b8e0a3ba14f3ce3f5714368f0d5b90fd46983..8e384f6622f25f7d310c1d62254e5efec9693625 100644 (file)
--- a/src/symtab.c
+++ b/src/symtab.c
@@ -20,111 +20,237 @@
 
 
 #include "system.h"
 
 
 #include "system.h"

-#include "hash.h"
+
+#include <hash.h>
+#include <quotearg.h>
+

 #include "complain.h"
 #include "complain.h"

-#include "symtab.h"

 #include "gram.h"
 #include "gram.h"

+#include "symtab.h"

 
 /*------------------------.
 | Distinguished symbols.  |
 `------------------------*/
 
 
 /*------------------------.
 | Distinguished symbols.  |
 `------------------------*/
 

-symbol_t *errtoken = NULL;
-symbol_t *undeftoken = NULL;
-symbol_t *eoftoken = NULL;
-symbol_t *axiom = NULL;
-symbol_t *startsymbol = NULL;
+symbol *errtoken = NULL;
+symbol *undeftoken = NULL;
+symbol *endtoken = NULL;
+symbol *accept = NULL;
+symbol *startsymbol = NULL;
+location startsymbol_location;

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

-static symbol_t *
-symbol_new (const char *tag)
+static symbol *
+symbol_new (uniqstr tag, location loc)

 {
 {

-  symbol_t *res = XMALLOC (symbol_t, 1);
+  symbol *res = XMALLOC (symbol, 1);
+
+  uniqstr_assert (tag);
+  res->tag = tag;
+  res->location = loc;

 
 

-  res->tag = xstrdup (tag);

   res->type_name = NULL;
   res->type_name = NULL;

+  res->destructor = NULL;
+  res->printer = NULL;
+

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

-  res->assoc = right_assoc;
+  res->assoc = undef_assoc;

   res->user_token_number = USER_NUMBER_UNDEFINED;
   res->user_token_number = USER_NUMBER_UNDEFINED;

+

   res->alias = NULL;
   res->class = unknown_sym;
 
   nsyms++;
   res->alias = NULL;
   res->class = unknown_sym;
 
   nsyms++;

-

   return res;
 }
 
 
   return res;
 }
 
 

-/*------------.
-| Free THIS.  |
-`------------*/
+/*-----------------------------------------------------------------.
+| Set the TYPE_NAME associated with SYM.  Does nothing if passed 0 |
+| as TYPE_NAME.                                                    |
+`-----------------------------------------------------------------*/
+
+void
+symbol_type_set (symbol *sym, uniqstr type_name, location loc)
+{
+  if (type_name)
+    {
+      if (sym->type_name)
+       complain_at (loc, _("type redeclaration for %s"), sym->tag);
+      uniqstr_assert (type_name);
+      sym->type_name = type_name;
+    }
+}
+
+
+/*------------------------------------------------------------------.
+| Set the DESTRUCTOR associated with SYM.  Do nothing if passed 0.  |
+`------------------------------------------------------------------*/
+
+void
+symbol_destructor_set (symbol *sym, char *destructor, location loc)
+{
+  if (destructor)
+    {
+      if (sym->destructor)
+       complain_at (loc, _("%s redeclaration for %s"),
+                    "%destructor", sym->tag);
+      sym->destructor = destructor;
+      sym->destructor_location = loc;
+    }
+}
+
+
+/*---------------------------------------------------------------.
+| Set the PRINTER associated with SYM.  Do nothing if passed 0.  |
+`---------------------------------------------------------------*/
+
+void
+symbol_printer_set (symbol *sym, char *printer, location loc)
+{
+  if (printer)
+    {
+      if (sym->printer)
+       complain_at (loc, _("%s redeclaration for %s"),
+                    "%printer", sym->tag);
+      sym->printer = printer;
+      sym->printer_location = loc;
+    }
+}
+
+
+/*-----------------------------------------------------------------.
+| Set the PRECEDENCE associated with SYM.  Does nothing if invoked |
+| with UNDEF_ASSOC as ASSOC.                                       |
+`-----------------------------------------------------------------*/
+
+void
+symbol_precedence_set (symbol *sym, int prec, assoc a, location loc)
+{
+  if (a != undef_assoc)
+    {
+      if (sym->prec != 0)
+       complain_at (loc, _("redefining precedence of %s"), sym->tag);
+      sym->prec = prec;
+      sym->assoc = a;
+    }
+
+  /* Only terminals have a precedence. */
+  symbol_class_set (sym, token_sym, loc);
+}
+
+
+/*------------------------------------.
+| Set the CLASS associated with SYM.  |
+`------------------------------------*/
+
+void
+symbol_class_set (symbol *sym, symbol_class class, location loc)
+{
+  if (sym->class != unknown_sym && sym->class != class)
+    complain_at (loc, _("symbol %s redefined"), sym->tag);
+
+  if (class == nterm_sym && sym->class != nterm_sym)
+    sym->number = nvars++;
+  else if (class == token_sym && sym->number == NUMBER_UNDEFINED)
+    sym->number = ntokens++;
+
+  sym->class = class;
+}
+
+
+/*------------------------------------------------.
+| Set the USER_TOKEN_NUMBER associated with SYM.  |
+`------------------------------------------------*/
+
+void
+symbol_user_token_number_set (symbol *sym, int user_token_number, location loc)
+{
+  if (sym->class != token_sym)
+    abort ();
+
+  if (sym->user_token_number != USER_NUMBER_UNDEFINED
+      && sym->user_token_number != user_token_number)
+    complain_at (loc, _("redefining user token number of %s"), sym->tag);
+
+  sym->user_token_number = user_token_number;
+  /* User defined $end token? */
+  if (user_token_number == 0)
+    {
+      endtoken = sym;
+      endtoken->number = 0;
+      /* It is always mapped to 0, so it was already counted in
+        NTOKENS.  */
+      --ntokens;
+    }
+}
+
+
+/*-----------.
+| Free SYM.  |
+`-----------*/

 
 static void
 
 static void

-symbol_free (symbol_t *this)
+symbol_free (symbol *sym)

 {
 {

-#if 0
-  /* This causes crashes because one string can appear more
-     than once.  */
-  XFREE (this->type_name);
-#endif
-  XFREE (this->tag);
-  XFREE (this);
+  free (sym);

 }
 
 
 }
 
 

-/*-----------------------------------------------------------.
-| If THIS is not defined, report an error, and consider it a |
-| nonterminal.                                               |
-`-----------------------------------------------------------*/
+/*----------------------------------------------------------.
+| If SYM is not defined, report an error, and consider it a |
+| nonterminal.                                              |
+`----------------------------------------------------------*/

 
 static bool
 
 static bool

-symbol_check_defined (symbol_t *this)
+symbol_check_defined (symbol *sym)

 {
 {

-  if (this->class == unknown_sym)
+  if (sym->class == unknown_sym)

     {
     {

-      complain
-       (_("symbol %s is used, but is not defined as a token and has no rules"),
-        this->tag);
-      this->class = nterm_sym;
-      this->number = nvars++;
+      complain_at
+       (sym->location,
+        _("symbol %s is used, but is not defined as a token and has no rules"),
+        sym->tag);
+      sym->class = nterm_sym;
+      sym->number = nvars++;

     }
 
     }
 

-  return TRUE;
+  return true;

 }
 
 
 }
 
 

-/*-------------------------------------------------------------------.
-| Declare the new SYMBOL.  Make it an alias of SYMVAL, and type them |
-| with TYPENAME.                                                     |
-`-------------------------------------------------------------------*/
+/*------------------------------------------------------------------.
+| Declare the new symbol SYM.  Make it an alias of SYMVAL, and type |
+| them with TYPENAME.                                               |
+`------------------------------------------------------------------*/

 
 void
 
 void

-symbol_make_alias (symbol_t *symbol, symbol_t *symval, char *typename)
+symbol_make_alias (symbol *sym, symbol *symval, location loc)

 {
   if (symval->alias)
 {
   if (symval->alias)

-    warn (_("symbol `%s' used more than once as a literal string"),
+    warn_at (loc, _("symbol `%s' used more than once as a literal string"),

          symval->tag);
          symval->tag);

-  else if (symbol->alias)
-    warn (_("symbol `%s' given more than one literal string"),
-         symbol->tag);
+  else if (sym->alias)
+    warn_at (loc, _("symbol `%s' given more than one literal string"),
+         sym->tag);

   else
     {
       symval->class = token_sym;
   else
     {
       symval->class = token_sym;

-      symval->type_name = typename;
-      symval->user_token_number = symbol->user_token_number;
-      symbol->user_token_number = USER_NUMBER_ALIAS;
-      symval->alias = symbol;
-      symbol->alias = symval;
-      /* symbol and symval combined are only one symbol */
+      symval->user_token_number = sym->user_token_number;
+      sym->user_token_number = USER_NUMBER_ALIAS;
+      symval->alias = sym;
+      sym->alias = symval;
+      /* sym and symval combined are only one symbol.  */

       nsyms--;
       ntokens--;
       nsyms--;
       ntokens--;

-      assert (ntokens == symbol->number || ntokens == symval->number);
-      symbol->number = symval->number =
-       (symval->number < symbol->number) ? symval->number : symbol->number;
+      if (ntokens != sym->number && ntokens != symval->number)
+       abort ();
+      sym->number = symval->number =
+       (symval->number < sym->number) ? symval->number : sym->number;

     }
 }
 
     }
 }
 


@@ -135,7 +261,7 @@ symbol_make_alias (symbol_t *symbol, symbol_t *symval, char *typename)
 `---------------------------------------------------------*/
 
 static bool
 `---------------------------------------------------------*/
 
 static bool

-symbol_check_alias_consistence (symbol_t *this)
+symbol_check_alias_consistence (symbol *this)

 {
   /* Check only those who _are_ the aliases. */
   if (this->alias && this->user_token_number == USER_NUMBER_ALIAS)
 {
   /* Check only those who _are_ the aliases. */
   if (this->alias && this->user_token_number == USER_NUMBER_ALIAS)


@@ -143,8 +269,9 @@ symbol_check_alias_consistence (symbol_t *this)
       if (this->prec != this->alias->prec)
        {
          if (this->prec != 0 && this->alias->prec != 0)
       if (this->prec != this->alias->prec)
        {
          if (this->prec != 0 && this->alias->prec != 0)

-           complain (_("conflicting precedences for %s and %s"),
-                     this->tag, this->alias->tag);
+           complain_at (this->alias->location,
+                        _("conflicting precedences for %s and %s"),
+                        this->tag, this->alias->tag);

          if (this->prec != 0)
            this->alias->prec = this->prec;
          else
          if (this->prec != 0)
            this->alias->prec = this->prec;
          else


@@ -153,16 +280,18 @@ symbol_check_alias_consistence (symbol_t *this)
 
       if (this->assoc != this->alias->assoc)
        {
 
       if (this->assoc != this->alias->assoc)
        {

-         if (this->assoc != 0 && this->alias->assoc != 0)
-           complain (_("conflicting assoc values for %s and %s"),
-                     this->tag, this->alias->tag);
-         if (this->assoc != 0)
+         if (this->assoc != undef_assoc && this->alias->assoc != undef_assoc)
+           complain_at (this->alias->location,
+                        _("conflicting associativities for %s (%s) and %s (%s)"),
+                        this->tag, assoc_to_string (this->assoc),
+                        this->alias->tag, assoc_to_string (this->alias->assoc));
+         if (this->assoc != undef_assoc)

            this->alias->assoc = this->assoc;
          else
            this->assoc = this->alias->assoc;
        }
     }
            this->alias->assoc = this->assoc;
          else
            this->assoc = this->alias->assoc;
        }
     }

-  return TRUE;
+  return true;

 }
 
 
 }
 
 


@@ -172,7 +301,7 @@ symbol_check_alias_consistence (symbol_t *this)
 `-------------------------------------------------------------------*/
 
 static bool
 `-------------------------------------------------------------------*/
 
 static bool

-symbol_pack (symbol_t *this)
+symbol_pack (symbol *this)

 {
   if (this->class == nterm_sym)
     {
 {
   if (this->class == nterm_sym)
     {


@@ -185,25 +314,27 @@ symbol_pack (symbol_t *this)
         prec and assoc fields and make both the same */
       if (this->number == NUMBER_UNDEFINED)
        {
         prec and assoc fields and make both the same */
       if (this->number == NUMBER_UNDEFINED)
        {

-         if (this == eoftoken || this->alias == eoftoken)
+         if (this == endtoken || this->alias == endtoken)

            this->number = this->alias->number = 0;
          else
            {
            this->number = this->alias->number = 0;
          else
            {

-             assert (this->alias->number != NUMBER_UNDEFINED);
+             if (this->alias->number == NUMBER_UNDEFINED)
+               abort ();

              this->number = this->alias->number;
            }
        }
              this->number = this->alias->number;
            }
        }

-      /* Do not do processing below for USER_NUMBER_ALIASs.  */
+      /* Do not do processing below for USER_NUMBER_ALIASes.  */

       if (this->user_token_number == USER_NUMBER_ALIAS)
       if (this->user_token_number == USER_NUMBER_ALIAS)

-       return TRUE;
+       return true;

     }
   else /* this->class == token_sym */
     {
     }
   else /* this->class == token_sym */
     {

-      assert (this->number != NUMBER_UNDEFINED);
+      if (this->number == NUMBER_UNDEFINED)
+       abort ();

     }
 
   symbols[this->number] = this;
     }
 
   symbols[this->number] = this;

-  return TRUE;
+  return true;

 }
 
 
 }
 
 


@@ -214,7 +345,7 @@ symbol_pack (symbol_t *this)
 `--------------------------------------------------*/
 
 static bool
 `--------------------------------------------------*/
 
 static bool

-symbol_translation (symbol_t *this)
+symbol_translation (symbol *this)

 {
   /* Non-terminal? */
   if (this->class == token_sym
 {
   /* Non-terminal? */
   if (this->class == token_sym


@@ -222,14 +353,15 @@ symbol_translation (symbol_t *this)
     {
       /* A token which translation has already been set? */
       if (token_translations[this->user_token_number] != undeftoken->number)
     {
       /* A token which translation has already been set? */
       if (token_translations[this->user_token_number] != undeftoken->number)

-       complain (_("tokens %s and %s both assigned number %d"),
-                 symbols[token_translations[this->user_token_number]]->tag,
-                 this->tag, this->user_token_number);
+       complain_at (this->location,
+                    _("tokens %s and %s both assigned number %d"),
+                    symbols[token_translations[this->user_token_number]]->tag,
+                    this->tag, this->user_token_number);

 
       token_translations[this->user_token_number] = this->number;
     }
 
 
       token_translations[this->user_token_number] = this->number;
     }
 

-  return TRUE;
+  return true;

 }
 
 
 }
 
 


@@ -243,15 +375,17 @@ symbol_translation (symbol_t *this)
 static struct hash_table *symbol_table = NULL;
 
 static bool
 static struct hash_table *symbol_table = NULL;
 
 static bool

-hash_compare_symbol_t (const symbol_t *m1, const symbol_t *m2)
+hash_compare_symbol (const symbol *m1, const symbol *m2)

 {
 {

-  return strcmp (m1->tag, m2->tag) ? FALSE : TRUE;
+  /* Since tags are unique, we can compare the pointers themselves.  */
+  return UNIQSTR_EQ (m1->tag, m2->tag);

 }
 
 static unsigned int
 }
 
 static unsigned int

-hash_symbol_t (const symbol_t *m, unsigned int tablesize)
+hash_symbol (const symbol *m, unsigned int tablesize)

 {
 {

-  return hash_string (m->tag, tablesize);
+  /* Since tags are unique, we can hash the pointer itself.  */
+  return ((size_t) m->tag) % tablesize;

 }
 
 
 }
 
 


@@ -264,8 +398,8 @@ symbols_new (void)
 {
   symbol_table = hash_initialize (HT_INITIAL_CAPACITY,
                                  NULL,
 {
   symbol_table = hash_initialize (HT_INITIAL_CAPACITY,
                                  NULL,

-                                 (Hash_hasher) hash_symbol_t,
-                                 (Hash_comparator) hash_compare_symbol_t,
+                                 (Hash_hasher) hash_symbol,
+                                 (Hash_comparator) hash_compare_symbol,

                                  (Hash_data_freer) symbol_free);
 }
 
                                  (Hash_data_freer) symbol_free);
 }
 


@@ -275,25 +409,49 @@ symbols_new (void)
 | yet, create it.                                                 |
 `----------------------------------------------------------------*/
 
 | yet, create it.                                                 |
 `----------------------------------------------------------------*/
 

-symbol_t *
-getsym (const char *key)
+symbol *
+symbol_get (const char *key, location loc)

 {
 {

-  symbol_t probe;
-  symbol_t *entry;
+  symbol probe;
+  symbol *entry;

 
 

-  (const char *) probe.tag = key;
+  /* Keep the symbol in a printable form.  */
+  key = uniqstr_new (quotearg_style (escape_quoting_style, key));
+  *(char const **) &probe.tag = key;

   entry = hash_lookup (symbol_table, &probe);
 
   if (!entry)
     {
       /* First insertion in the hash. */
   entry = hash_lookup (symbol_table, &probe);
 
   if (!entry)
     {
       /* First insertion in the hash. */

-      entry = symbol_new (key);
+      entry = symbol_new (key, loc);

       hash_insert (symbol_table, entry);
     }
   return entry;
 }
 
 
       hash_insert (symbol_table, entry);
     }
   return entry;
 }
 
 

+/*------------------------------------------------------------------.
+| Generate a dummy nonterminal, whose name cannot conflict with the |
+| user's names.                                                     |
+`------------------------------------------------------------------*/
+
+symbol *
+dummy_symbol_get (location loc)
+{
+  /* Incremented for each generated symbol.  */
+  static int dummy_count = 0;
+  static char buf[256];
+
+  symbol *sym;
+
+  sprintf (buf, "@%d", ++dummy_count);
+  sym = symbol_get (buf, loc);
+  sym->class = nterm_sym;
+  sym->number = nvars++;
+  return sym;
+}
+
+

 /*-------------------.
 | Free the symbols.  |
 `-------------------*/
 /*-------------------.
 | Free the symbols.  |
 `-------------------*/


@@ -302,6 +460,7 @@ void
 symbols_free (void)
 {
   hash_free (symbol_table);
 symbols_free (void)
 {
   hash_free (symbol_table);

+  free (symbols);

 }
 
 
 }
 
 


@@ -338,7 +497,7 @@ symbols_check_defined (void)
 static void
 symbols_token_translations_init (void)
 {
 static void
 symbols_token_translations_init (void)
 {

-  int num_256_available_p = TRUE;
+  bool num_256_available_p = true;

   int i;
 
   /* Find the highest user token number, and whether 256, the POSIX
   int i;
 
   /* Find the highest user token number, and whether 256, the POSIX


@@ -346,13 +505,13 @@ symbols_token_translations_init (void)
   max_user_token_number = 0;
   for (i = 0; i < ntokens; ++i)
     {
   max_user_token_number = 0;
   for (i = 0; i < ntokens; ++i)
     {

-      symbol_t *this = symbols[i];
+      symbol *this = symbols[i];

       if (this->user_token_number != USER_NUMBER_UNDEFINED)
        {
          if (this->user_token_number > max_user_token_number)
            max_user_token_number = this->user_token_number;
          if (this->user_token_number == 256)
       if (this->user_token_number != USER_NUMBER_UNDEFINED)
        {
          if (this->user_token_number > max_user_token_number)
            max_user_token_number = this->user_token_number;
          if (this->user_token_number == 256)

-           num_256_available_p = FALSE;
+           num_256_available_p = false;

        }
     }
 
        }
     }
 


@@ -367,18 +526,18 @@ symbols_token_translations_init (void)
 
   for (i = 0; i < ntokens; ++i)
     {
 
   for (i = 0; i < ntokens; ++i)
     {

-      symbol_t *this = symbols[i];
+      symbol *this = symbols[i];

       if (this->user_token_number == USER_NUMBER_UNDEFINED)
        this->user_token_number = ++max_user_token_number;
       if (this->user_token_number > max_user_token_number)
        max_user_token_number = this->user_token_number;
     }
 
       if (this->user_token_number == USER_NUMBER_UNDEFINED)
        this->user_token_number = ++max_user_token_number;
       if (this->user_token_number > max_user_token_number)
        max_user_token_number = this->user_token_number;
     }
 

-  token_translations = XCALLOC (symbol_number_t, max_user_token_number + 1);
+  token_translations = XCALLOC (symbol_number, max_user_token_number + 1);

 
   /* Initialize all entries for literal tokens to 2, the internal
 
   /* Initialize all entries for literal tokens to 2, the internal

-     token number for $undefined., which represents all invalid
-     inputs.  */
+     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, NULL);
   for (i = 0; i < max_user_token_number + 1; i++)
     token_translations[i] = undeftoken->number;
   symbols_do (symbol_translation, NULL);


@@ -393,7 +552,7 @@ symbols_token_translations_init (void)
 void
 symbols_pack (void)
 {
 void
 symbols_pack (void)
 {

-  symbols = XCALLOC (symbol_t *, nsyms);
+  symbols = XCALLOC (symbol *, nsyms);

 
   symbols_do (symbol_check_alias_consistence, NULL);
   symbols_do (symbol_pack, NULL);
 
   symbols_do (symbol_check_alias_consistence, NULL);
   symbols_do (symbol_pack, NULL);


@@ -401,7 +560,11 @@ symbols_pack (void)
   symbols_token_translations_init ();
 
   if (startsymbol->class == unknown_sym)
   symbols_token_translations_init ();
 
   if (startsymbol->class == unknown_sym)

-    fatal (_("the start symbol %s is undefined"), startsymbol->tag);
+    fatal_at (startsymbol_location,
+             _("the start symbol %s is undefined"),
+             startsymbol->tag);

   else if (startsymbol->class == token_sym)
   else if (startsymbol->class == token_sym)

-    fatal (_("the start symbol %s is a token"), startsymbol->tag);
+    fatal_at (startsymbol_location,
+             _("the start symbol %s is a token"),
+             startsymbol->tag);

 }
 }