fix for printers and destructors.

[bison.git] / src / reader.c

diff --git a/src/reader.c b/src/reader.c
index 7dd0aaa46c7b13d528e31a18746a4501175bd945..c456cbff17c130ad57e0c8e72210035d9a5d3f1c 100644 (file)
--- a/src/reader.c
+++ b/src/reader.c
@@ -94,7 +94,7 @@ get_merge_function (uniqstr name)
       syms->next = xmalloc (sizeof syms->next[0]);
       syms->next->name = uniqstr_new (name);
       /* After all symbol type declarations have been parsed, packgram invokes
       syms->next = xmalloc (sizeof syms->next[0]);
       syms->next->name = uniqstr_new (name);
       /* After all symbol type declarations have been parsed, packgram invokes

-        record_merge_function_type to set the type.  */
+         record_merge_function_type to set the type.  */

       syms->next->type = NULL;
       syms->next->next = NULL;
       merge_functions = head.next;
       syms->next->type = NULL;
       syms->next->next = NULL;
       merge_functions = head.next;


@@ -132,14 +132,14 @@ record_merge_function_type (int merger, uniqstr type, location declaration_loc)
                    _("result type clash on merge function %s: <%s> != <%s>"),
                    quote (merge_function->name), type, merge_function->type);
       complain_at (merge_function->type_declaration_location,
                    _("result type clash on merge function %s: <%s> != <%s>"),
                    quote (merge_function->name), type, merge_function->type);
       complain_at (merge_function->type_declaration_location,

-                  _("previous declaration"));
+                   _("previous declaration"));

     }
   merge_function->type = uniqstr_new (type);
   merge_function->type_declaration_location = declaration_loc;
 }
 
 /*--------------------------------------.
     }
   merge_function->type = uniqstr_new (type);
   merge_function->type_declaration_location = declaration_loc;
 }
 
 /*--------------------------------------.

-| Free all merge-function definitions. |
+| Free all merge-function definitions.  |

 `--------------------------------------*/
 
 void
 `--------------------------------------*/
 
 void


@@ -198,8 +198,8 @@ assign_named_ref (symbol_list *p, named_ref *name)
   if (name->id == sym->tag)
     {
       warn_at (name->loc,
   if (name->id == sym->tag)
     {
       warn_at (name->loc,

-              _("duplicated symbol name for %s ignored"),
-              quote (sym->tag));
+               _("duplicated symbol name for %s ignored"),
+               quote (sym->tag));

       named_ref_free (name);
     }
   else
       named_ref_free (name);
     }
   else


@@ -220,7 +220,7 @@ static symbol_list *previous_rule_end = NULL;
 
 void
 grammar_current_rule_begin (symbol *lhs, location loc,
 
 void
 grammar_current_rule_begin (symbol *lhs, location loc,

-                           named_ref *lhs_name)
+                            named_ref *lhs_name)

 {
   symbol_list* p;
 
 {
   symbol_list* p;
 


@@ -257,7 +257,7 @@ grammar_current_rule_begin (symbol *lhs, location loc,
 static bool
 symbol_should_be_used (symbol_list const *s, bool *midrule_warning)
 {
 static bool
 symbol_should_be_used (symbol_list const *s, bool *midrule_warning)
 {

-  if (symbol_destructor_get (s->content.sym)->code)
+  if (symbol_code_props_get (s->content.sym, destructor)->code)

     return true;
   if ((s->midrule && s->midrule->action_props.is_value_used)
       || (s->midrule_parent_rule
     return true;
   if ((s->midrule && s->midrule->action_props.is_value_used)
       || (s->midrule_parent_rule


@@ -291,19 +291,19 @@ grammar_rule_check (const symbol_list *r)
       symbol *first_rhs = r->next->content.sym;
       /* If $$ is being set in default way, report if any type mismatch.  */
       if (first_rhs)
       symbol *first_rhs = r->next->content.sym;
       /* If $$ is being set in default way, report if any type mismatch.  */
       if (first_rhs)

-       {
-         char const *lhs_type = r->content.sym->type_name;
-         const char *rhs_type =
-           first_rhs->type_name ? first_rhs->type_name : "";
-         if (!UNIQSTR_EQ (lhs_type, rhs_type))
-           warn_at (r->location,
-                    _("type clash on default action: <%s> != <%s>"),
-                    lhs_type, rhs_type);
-       }
+        {
+          char const *lhs_type = r->content.sym->type_name;
+          const char *rhs_type =
+            first_rhs->type_name ? first_rhs->type_name : "";
+          if (!UNIQSTR_EQ (lhs_type, rhs_type))
+            warn_at (r->location,
+                     _("type clash on default action: <%s> != <%s>"),
+                     lhs_type, rhs_type);
+        }

       /* Warn if there is no default for $$ but we need one.  */
       else
       /* Warn if there is no default for $$ but we need one.  */
       else

-       warn_at (r->location,
-                _("empty rule for typed nonterminal, and no action"));
+        warn_at (r->location,
+                 _("empty rule for typed nonterminal, and no action"));

     }
 
   /* Check that symbol values that should be used are in fact used.  */
     }
 
   /* Check that symbol values that should be used are in fact used.  */


@@ -333,7 +333,7 @@ grammar_rule_check (const symbol_list *r)
      it for char literals and strings, which are always tokens.  */
   if (r->ruleprec
       && r->ruleprec->tag[0] != '\'' && r->ruleprec->tag[0] != '"'
      it for char literals and strings, which are always tokens.  */
   if (r->ruleprec
       && r->ruleprec->tag[0] != '\'' && r->ruleprec->tag[0] != '"'

-      && !r->ruleprec->declared && !r->ruleprec->prec)
+      && r->ruleprec->status != declared && !r->ruleprec->prec)

     warn_at (r->location, _("token for %%prec is not defined: %s"),
              r->ruleprec->tag);
 }
     warn_at (r->location, _("token for %%prec is not defined: %s"),
              r->ruleprec->tag);
 }


@@ -384,7 +384,8 @@ grammar_midrule_action (void)
   code_props_rule_action_init (&midrule->action_props,
                                current_rule->action_props.code,
                                current_rule->action_props.location,
   code_props_rule_action_init (&midrule->action_props,
                                current_rule->action_props.code,
                                current_rule->action_props.location,

-                               midrule, 0);
+                               midrule, 0,
+                               current_rule->action_props.is_predicate);

   code_props_none_init (&current_rule->action_props);
 
   if (previous_rule_end)
   code_props_none_init (&current_rule->action_props);
 
   if (previous_rule_end)


@@ -461,7 +462,7 @@ grammar_current_rule_merge_set (uniqstr name, location loc)
 
 void
 grammar_current_rule_symbol_append (symbol *sym, location loc,
 
 void
 grammar_current_rule_symbol_append (symbol *sym, location loc,

-                                   named_ref *name)
+                                    named_ref *name)

 {
   symbol_list *p;
   if (current_rule->action_props.code)
 {
   symbol_list *p;
   if (current_rule->action_props.code)


@@ -469,20 +470,22 @@ grammar_current_rule_symbol_append (symbol *sym, location loc,
   p = grammar_symbol_append (sym, loc);
   if (name)
     assign_named_ref(p, name);
   p = grammar_symbol_append (sym, loc);
   if (name)
     assign_named_ref(p, name);

+  if (sym->status == undeclared || sym->status == used)
+    sym->status = needed;

 }
 
 /* Attach an ACTION to the current rule.  */
 
 void
 grammar_current_rule_action_append (const char *action, location loc,
 }
 
 /* Attach an ACTION to the current rule.  */
 
 void
 grammar_current_rule_action_append (const char *action, location loc,

-                                   named_ref *name)
+                                    named_ref *name, bool is_predicate)

 {
   if (current_rule->action_props.code)
     grammar_midrule_action ();
   /* After all symbol declarations have been parsed, packgram invokes
      code_props_translate_code.  */
   code_props_rule_action_init (&current_rule->action_props, action, loc,
 {
   if (current_rule->action_props.code)
     grammar_midrule_action ();
   /* After all symbol declarations have been parsed, packgram invokes
      code_props_translate_code.  */
   code_props_rule_action_init (&current_rule->action_props, action, loc,

-                               current_rule, name);
+                               current_rule, name, is_predicate);

 }
 
 \f
 }
 
 \f


@@ -510,7 +513,7 @@ packgram (void)
       int rule_length = 0;
       symbol *ruleprec = p->ruleprec;
       record_merge_function_type (p->merger, p->content.sym->type_name,
       int rule_length = 0;
       symbol *ruleprec = p->ruleprec;
       record_merge_function_type (p->merger, p->content.sym->type_name,

-                                 p->merger_declaration_location);
+                                  p->merger_declaration_location);

       rules[ruleno].user_number = ruleno;
       rules[ruleno].number = ruleno;
       rules[ruleno].lhs = p->content.sym;
       rules[ruleno].user_number = ruleno;
       rules[ruleno].number = ruleno;
       rules[ruleno].lhs = p->content.sym;


@@ -523,49 +526,50 @@ packgram (void)
       rules[ruleno].useful = true;
       rules[ruleno].action = p->action_props.code;
       rules[ruleno].action_location = p->action_props.location;
       rules[ruleno].useful = true;
       rules[ruleno].action = p->action_props.code;
       rules[ruleno].action_location = p->action_props.location;

+      rules[ruleno].is_predicate = p->action_props.is_predicate;

 
       /* If the midrule's $$ is set or its $n is used, remove the `$' from the
 
       /* If the midrule's $$ is set or its $n is used, remove the `$' from the

-        symbol name so that it's a user-defined symbol so that the default
-        %destructor and %printer apply.  */
+         symbol name so that it's a user-defined symbol so that the default
+         %destructor and %printer apply.  */

       if (p->midrule_parent_rule
           && (p->action_props.is_value_used
       if (p->midrule_parent_rule
           && (p->action_props.is_value_used

-             || symbol_list_n_get (p->midrule_parent_rule,
-                                   p->midrule_parent_rhs_index)
+              || symbol_list_n_get (p->midrule_parent_rule,
+                                    p->midrule_parent_rhs_index)

                    ->action_props.is_value_used))
                    ->action_props.is_value_used))

-       p->content.sym->tag += 1;
+        p->content.sym->tag += 1;

 
       /* Don't check the generated rule 0.  It has no action, so some rhs
 
       /* Don't check the generated rule 0.  It has no action, so some rhs

-        symbols may appear unused, but the parsing algorithm ensures that
-        %destructor's are invoked appropriately.  */
+         symbols may appear unused, but the parsing algorithm ensures that
+         %destructor's are invoked appropriately.  */

       if (p != grammar)
       if (p != grammar)

-       grammar_rule_check (p);
+        grammar_rule_check (p);

 
       for (p = p->next; p && p->content.sym; p = p->next)
 
       for (p = p->next; p && p->content.sym; p = p->next)

-       {
-         ++rule_length;
+        {
+          ++rule_length;

 
 

-         /* Don't allow rule_length == INT_MAX, since that might
-            cause confusion with strtol if INT_MAX == LONG_MAX.  */
-         if (rule_length == INT_MAX)
-             fatal_at (rules[ruleno].location, _("rule is too long"));
+          /* Don't allow rule_length == INT_MAX, since that might
+             cause confusion with strtol if INT_MAX == LONG_MAX.  */
+          if (rule_length == INT_MAX)
+              fatal_at (rules[ruleno].location, _("rule is too long"));

 
 

-         /* item_number = symbol_number.
-            But the former needs to contain more: negative rule numbers. */
-         ritem[itemno++] =
+          /* item_number = symbol_number.
+             But the former needs to contain more: negative rule numbers. */
+          ritem[itemno++] =

             symbol_number_as_item_number (p->content.sym->number);
             symbol_number_as_item_number (p->content.sym->number);

-         /* A rule gets by default the precedence and associativity
-            of its last token.  */
-         if (p->content.sym->class == token_sym && default_prec)
-           rules[ruleno].prec = p->content.sym;
-       }
+          /* A rule gets by default the precedence and associativity
+             of its last token.  */
+          if (p->content.sym->class == token_sym && default_prec)
+            rules[ruleno].prec = p->content.sym;
+        }

 
       /* If this rule has a %prec,
          the specified symbol's precedence replaces the default.  */
       if (ruleprec)
 
       /* If this rule has a %prec,
          the specified symbol's precedence replaces the default.  */
       if (ruleprec)

-       {
-         rules[ruleno].precsym = ruleprec;
-         rules[ruleno].prec = ruleprec;
-       }
+        {
+          rules[ruleno].precsym = ruleprec;
+          rules[ruleno].prec = ruleprec;
+        }

       /* An item ends by the rule number (negated).  */
       ritem[itemno++] = rule_number_as_item_number (ruleno);
       aver (itemno < ITEM_NUMBER_MAX);
       /* An item ends by the rule number (negated).  */
       ritem[itemno++] = rule_number_as_item_number (ruleno);
       aver (itemno < ITEM_NUMBER_MAX);


@@ -573,7 +577,7 @@ packgram (void)
       aver (ruleno < RULE_NUMBER_MAX);
 
       if (p)
       aver (ruleno < RULE_NUMBER_MAX);
 
       if (p)

-       p = p->next;
+        p = p->next;

     }
 
   aver (itemno == nritems);
     }
 
   aver (itemno == nritems);


@@ -636,7 +640,7 @@ prepare_percent_define_front_end_variables (void)
        default.  */
     muscle_percent_define_default ("lr.type", "lalr");
     lr_type = muscle_percent_define_get ("lr.type");
        default.  */
     muscle_percent_define_default ("lr.type", "lalr");
     lr_type = muscle_percent_define_get ("lr.type");

-    if (0 != strcmp (lr_type, "canonical-lr"))
+    if (STRNEQ (lr_type, "canonical-lr"))

       muscle_percent_define_default ("lr.default-reductions", "most");
     else
       muscle_percent_define_default ("lr.default-reductions", "accepting");
       muscle_percent_define_default ("lr.default-reductions", "most");
     else
       muscle_percent_define_default ("lr.default-reductions", "accepting");


@@ -657,7 +661,7 @@ prepare_percent_define_front_end_variables (void)
 
 /*-------------------------------------------------------------.
 | Check the grammar that has just been read, and convert it to |
 
 /*-------------------------------------------------------------.
 | Check the grammar that has just been read, and convert it to |

-| internal form.                                              |
+| internal form.                                               |

 `-------------------------------------------------------------*/
 
 static void
 `-------------------------------------------------------------*/
 
 static void