X-Git-Url: https://git.saurik.com/bison.git/blobdiff_plain/6cf3716c3166d6d41cdbeea45d018b1760184421..0906b12cd56f9777fb684b8a257a0e56c090a93c:/src/symtab.c?ds=sidebyside

diff --git a/src/symtab.c b/src/symtab.c
index 14d107c9..b8074a0a 100644
--- a/src/symtab.c
+++ b/src/symtab.c
@@ -33,6 +33,7 @@
 `-------------------------------------------------------------------*/
 
 static symbol **symbols_sorted = NULL;
+static symbol **semantic_types_sorted = NULL;
 
 /*------------------------.
 | Distinguished symbols.  |
@@ -45,20 +46,6 @@ symbol *accept = NULL;
 symbol *startsymbol = NULL;
 location startsymbol_location;
 
-/*---------------------------------------.
-| Default %destructor's and %printer's.  |
-`---------------------------------------*/
-
-static code_props default_tagged_code_props[CODE_PROPS_SIZE] =
-  {
-    CODE_PROPS_NONE_INIT,
-    CODE_PROPS_NONE_INIT,
-  };
-static code_props default_tagless_code_props[CODE_PROPS_SIZE] =
-  {
-    CODE_PROPS_NONE_INIT,
-    CODE_PROPS_NONE_INIT,
-  };
 
 /*---------------------------------.
 | Create a new symbol, named TAG.  |
@@ -74,8 +61,8 @@ symbol_new (uniqstr tag, location loc)
   /* If the tag is not a string (starts with a double quote), check
      that it is valid for Yacc. */
   if (tag[0] != '\"' && tag[0] != '\'' && strchr (tag, '-'))
-    yacc_at (loc, _("POSIX Yacc forbids dashes in symbol names: %s"),
-             tag);
+    complain (&loc, Wyacc,
+              _("POSIX Yacc forbids dashes in symbol names: %s"), tag);
 
   res->tag = tag;
   res->location = loc;
@@ -94,8 +81,8 @@ symbol_new (uniqstr tag, location loc)
   res->status = undeclared;
 
   if (nsyms == SYMBOL_NUMBER_MAXIMUM)
-    fatal (_("too many symbols in input grammar (limit is %d)"),
-           SYMBOL_NUMBER_MAXIMUM);
+    complain (NULL, fatal, _("too many symbols in input grammar (limit is %d)"),
+              SYMBOL_NUMBER_MAXIMUM);
   nsyms++;
   return res;
 }
@@ -118,12 +105,14 @@ code_props_type_string (code_props_type kind)
 `----------------------------------------*/
 
 static semantic_type *
-semantic_type_new (uniqstr tag)
+semantic_type_new (uniqstr tag, const location *loc)
 {
   semantic_type *res = xmalloc (sizeof *res);
 
   uniqstr_assert (tag);
   res->tag = tag;
+  if (loc)
+    res->location = *loc;
   for (int i = 0; i < CODE_PROPS_SIZE; ++i)
     code_props_none_init (&res->props[i]);
 
@@ -144,7 +133,7 @@ semantic_type_new (uniqstr tag)
     fprintf (f, " %s { %s }", #Attr, s->props[Attr].code)
 
 void
-symbol_print (symbol *s, FILE *f)
+symbol_print (symbol const *s, FILE *f)
 {
   if (s)
     {
@@ -204,16 +193,24 @@ static void
 symbol_redeclaration (symbol *s, const char *what, location first,
                       location second)
 {
-  complain_at (second, _("%s redeclaration for %s"), what, s->tag);
-  complain_at (first, _("previous declaration"));
+  unsigned i = 0;
+  complain_indent (&second, complaint, &i,
+                   _("%s redeclaration for %s"), what, s->tag);
+  i += SUB_INDENT;
+  complain_indent (&first, complaint, &i,
+                   _("previous declaration"));
 }
 
 static void
 semantic_type_redeclaration (semantic_type *s, const char *what, location first,
                              location second)
 {
-  complain_at (second, _("%s redeclaration for <%s>"), what, s->tag);
-  complain_at (first, _("previous declaration"));
+  unsigned i = 0;
+  complain_indent (&second, complaint, &i,
+                   _("%s redeclaration for <%s>"), what, s->tag);
+  i += SUB_INDENT;
+  complain_indent (&first, complaint, &i,
+                   _("previous declaration"));
 }
 
 
@@ -271,9 +268,8 @@ semantic_type_code_props_set (semantic_type *type,
 | Get the computed %destructor or %printer for SYM.  |
 `---------------------------------------------------*/
 
-code_props const *
-symbol_code_props_get (symbol const *sym,
-                       code_props_type kind)
+code_props *
+symbol_code_props_get (symbol *sym, code_props_type kind)
 {
   /* Per-symbol code props.  */
   if (sym->props[kind].code)
@@ -282,19 +278,21 @@ symbol_code_props_get (symbol const *sym,
   /* Per-type code props.  */
   if (sym->type_name)
     {
-      code_props const *code =
-        &semantic_type_get (sym->type_name)->props[kind];
+      code_props *code =
+        &semantic_type_get (sym->type_name, NULL)->props[kind];
       if (code->code)
         return code;
     }
 
   /* Apply default code props's only to user-defined symbols.  */
-  if (sym->tag[0] == '$' || sym == errtoken)
-    return &code_props_none;
-
-  if (sym->type_name)
-    return &default_tagged_code_props[kind];
-  return &default_tagless_code_props[kind];
+  if (sym->tag[0] != '$' && sym != errtoken)
+    {
+      code_props *code =
+        &semantic_type_get (sym->type_name ? "*" : "", NULL)->props[kind];
+      if (code->code)
+        return code;
+    }
+  return &code_props_none;
 }
 
 /*-----------------------------------------------------------------.
@@ -330,7 +328,7 @@ symbol_class_set (symbol *sym, symbol_class class, location loc, bool declaring)
   bool warned = false;
   if (sym->class != unknown_sym && sym->class != class)
     {
-      complain_at (loc, _("symbol %s redefined"), sym->tag);
+      complain (&loc, complaint, _("symbol %s redefined"), sym->tag);
       // Don't report both "redefined" and "redeclared".
       warned = true;
     }
@@ -345,7 +343,7 @@ symbol_class_set (symbol *sym, symbol_class class, location loc, bool declaring)
   if (declaring)
     {
       if (sym->status == declared && !warned)
-        warn_at (loc, _("symbol %s redeclared"), sym->tag);
+        complain (&loc, Wother, _("symbol %s redeclared"), sym->tag);
       sym->status = declared;
     }
 }
@@ -366,7 +364,8 @@ symbol_user_token_number_set (symbol *sym, int user_token_number, location loc)
     user_token_numberp = &sym->alias->user_token_number;
   if (*user_token_numberp != USER_NUMBER_UNDEFINED
       && *user_token_numberp != user_token_number)
-    complain_at (loc, _("redefining user token number of %s"), sym->tag);
+    complain (&loc, complaint, _("redefining user token number of %s"),
+              sym->tag);
 
   *user_token_numberp = user_token_number;
   /* User defined $end token? */
@@ -392,30 +391,51 @@ symbol_check_defined (symbol *sym)
 {
   if (sym->class == unknown_sym)
     {
-      switch (sym->status)
-        {
-        case used:
-          warn_at (sym->location,
-                   _("symbol %s is used, but is not defined as a token"
-                     " and has no rules"),
-                   sym->tag);
-          break;
-        case undeclared:
-        case needed:
-          complain_at (sym->location,
-                       _("symbol %s is used, but is not defined as a token"
-                         " and has no rules"),
-                       sym->tag);
-          break;
-        case declared:
-          /* If declared, then sym->class != unknown_sym. */
-          assert (0);
-        }
-
+      assert (sym->status != declared);
+      complain (&sym->location,
+                sym->status == needed ? complaint : Wother,
+                _("symbol %s is used, but is not defined as a token"
+                  " and has no rules"),
+                  sym->tag);
       sym->class = nterm_sym;
       sym->number = nvars++;
     }
 
+  for (int i = 0; i < 2; ++i)
+    symbol_code_props_get (sym, i)->is_used = true;
+
+  /* Set the semantic type status associated to the current symbol to
+     'declared' so that we could check semantic types unnecessary uses. */
+  if (sym->type_name)
+    {
+      semantic_type *sem_type = semantic_type_get (sym->type_name, NULL);
+      if (sem_type)
+        sem_type->status = declared;
+    }
+
+  return true;
+}
+
+static inline bool
+semantic_type_check_defined (semantic_type *sem_type)
+{
+  // <*> and <> do not have to be "declared".
+  if (sem_type->status == declared
+      || !*sem_type->tag
+      || STREQ(sem_type->tag, "*"))
+    {
+      for (int i = 0; i < 2; ++i)
+        if (sem_type->props[i].kind != CODE_PROPS_NONE
+            && ! sem_type->props[i].is_used)
+          complain (&sem_type->location, Wother,
+                    _("useless %s for type <%s>"),
+                    code_props_type_string (i), sem_type->tag);
+    }
+  else
+    complain (&sem_type->location, Wother,
+              _("type <%s> is used, but is not associated to any symbol"),
+              sem_type->tag);
+
   return true;
 }
 
@@ -425,16 +445,23 @@ symbol_check_defined_processor (void *sym, void *null ATTRIBUTE_UNUSED)
   return symbol_check_defined (sym);
 }
 
+static bool
+semantic_type_check_defined_processor (void *sem_type,
+                                       void *null ATTRIBUTE_UNUSED)
+{
+  return semantic_type_check_defined (sem_type);
+}
+
 
 void
 symbol_make_alias (symbol *sym, symbol *str, location loc)
 {
   if (str->alias)
-    warn_at (loc, _("symbol %s used more than once as a literal string"),
-             str->tag);
+    complain (&loc, Wother,
+              _("symbol %s used more than once as a literal string"), str->tag);
   else if (sym->alias)
-    warn_at (loc, _("symbol %s given more than one literal string"),
-             sym->tag);
+    complain (&loc, Wother,
+              _("symbol %s given more than one literal string"), sym->tag);
   else
     {
       str->class = token_sym;
@@ -527,6 +554,7 @@ symbol_pack_processor (void *this, void *null ATTRIBUTE_UNUSED)
 static void
 user_token_number_redeclaration (int num, symbol *first, symbol *second)
 {
+  unsigned i = 0;
   /* User token numbers are not assigned during the parsing, but in a
      second step, via a traversal of the symbol table sorted on tag.
 
@@ -538,11 +566,13 @@ user_token_number_redeclaration (int num, symbol *first, symbol *second)
       first = second;
       second = tmp;
     }
-  complain_at (second->location,
-               _("user token number %d redeclaration for %s"),
-               num, second->tag);
-  complain_at (first->location, _("previous declaration for %s"),
-               first->tag);
+  complain_indent (&second->location, complaint, &i,
+                   _("user token number %d redeclaration for %s"),
+                   num, second->tag);
+  i += SUB_INDENT;
+  complain_indent (&first->location, complaint, &i,
+                   _("previous declaration for %s"),
+                   first->tag);
 }
 
 /*--------------------------------------------------.
@@ -690,7 +720,7 @@ symbol_from_uniqstr (const uniqstr key, location loc)
 `-----------------------------------------------------------------------*/
 
 semantic_type *
-semantic_type_from_uniqstr (const uniqstr key)
+semantic_type_from_uniqstr (const uniqstr key, const location *loc)
 {
   semantic_type probe;
   semantic_type *entry;
@@ -701,7 +731,7 @@ semantic_type_from_uniqstr (const uniqstr key)
   if (!entry)
     {
       /* First insertion in the hash. */
-      entry = semantic_type_new (key);
+      entry = semantic_type_new (key, loc);
       if (!hash_insert (semantic_type_table, entry))
         xalloc_die ();
     }
@@ -727,9 +757,9 @@ symbol_get (const char *key, location loc)
 `-----------------------------------------------------------------------*/
 
 semantic_type *
-semantic_type_get (const char *key)
+semantic_type_get (const char *key, const location *loc)
 {
-  return semantic_type_from_uniqstr (uniqstr_new (key));
+  return semantic_type_from_uniqstr (uniqstr_new (key), loc);
 }
 
 
@@ -819,6 +849,8 @@ symbols_check_defined (void)
 {
   symbols_do (symbol_check_defined_processor, NULL,
               symbol_table, symbols_sorted);
+  symbols_do (semantic_type_check_defined_processor, NULL,
+              semantic_type_table, semantic_types_sorted);
 }
 
 /*------------------------------------------------------------------.
@@ -918,45 +950,11 @@ symbols_pack (void)
   symbols_token_translations_init ();
 
   if (startsymbol->class == unknown_sym)
-    fatal_at (startsymbol_location,
+    complain (&startsymbol_location, fatal,
               _("the start symbol %s is undefined"),
               startsymbol->tag);
   else if (startsymbol->class == token_sym)
-    fatal_at (startsymbol_location,
+    complain (&startsymbol_location, fatal,
               _("the start symbol %s is a token"),
               startsymbol->tag);
 }
-
-
-/*--------------------------------------------------.
-| Set default tagged/tagless %destructor/%printer.  |
-`--------------------------------------------------*/
-
-void
-default_tagged_code_props_set (code_props_type kind, code_props const *code)
-{
-  if (default_tagged_code_props[kind].code)
-    {
-      complain_at (code->location,
-                   _("redeclaration for default tagged %s"),
-                   code_props_type_string (kind));
-      complain_at (default_tagged_code_props[kind].location,
-                   _("previous declaration"));
-    }
-  default_tagged_code_props[kind] = *code;
-}
-
-void
-default_tagless_code_props_set (code_props_type kind, code_props const *code)
-{
-  if (default_tagless_code_props[kind].code)
-    {
-      complain_at (code->location,
-                   _("redeclaration for default tagless %s"),
-                   code_props_type_string (kind));
-      complain_at (default_tagless_code_props[kind].location,
-                   _("previous declaration"));
-    }
-  default_tagless_code_props[kind] = *code;
-}
-