X-Git-Url: https://git.saurik.com/bison.git/blobdiff_plain/8efe435c059af57671105fd8671ba97bb8474264..536545f3a45d64cad0469efa125d3d96052e723c:/src/symtab.c

diff --git a/src/symtab.c b/src/symtab.c
index 0011006d..0a9d6baa 100644
--- a/src/symtab.c
+++ b/src/symtab.c
@@ -20,6 +20,7 @@
 
 
 #include "system.h"
+#include "quotearg.h"
 #include "hash.h"
 #include "complain.h"
 #include "symtab.h"
@@ -41,16 +42,22 @@ location_t startsymbol_location;
 `---------------------------------*/
 
 static symbol_t *
-symbol_new (const char *tag)
+symbol_new (const char *tag, location_t location)
 {
   symbol_t *res = XMALLOC (symbol_t, 1);
 
   res->tag = xstrdup (tag);
+  res->location = location;
+
   res->type_name = NULL;
+  res->destructor = NULL;
+  res->printer = NULL;
+
   res->number = NUMBER_UNDEFINED;
   res->prec = 0;
   res->assoc = right_assoc;
   res->user_token_number = USER_NUMBER_UNDEFINED;
+
   res->alias = NULL;
   res->class = unknown_sym;
 
@@ -65,17 +72,56 @@ symbol_new (const char *tag)
 `------------------------------------------------------------------*/
 
 void
-symbol_type_set (symbol_t *symbol, char *type_name)
+symbol_type_set (symbol_t *symbol, char *type_name, location_t location)
 {
   if (type_name)
     {
       if (symbol->type_name)
-	complain (_("type redeclaration for %s"), symbol->tag);
+	complain_at (location,
+		     _("type redeclaration for %s"), symbol->tag);
       symbol->type_name = type_name;
     }
 }
 
 
+/*-------------------------------------------------------------------.
+| Set the DESTRUCTOR associated to SYMBOL.  Do nothing if passed 0.  |
+`-------------------------------------------------------------------*/
+
+void
+symbol_destructor_set (symbol_t *symbol, char *destructor, location_t location)
+{
+  if (destructor)
+    {
+      if (symbol->destructor)
+	complain_at (location,
+		     _("%s redeclaration for %s"),
+		     "%destructor", symbol->tag);
+      symbol->destructor = destructor;
+      symbol->destructor_location = location;
+    }
+}
+
+
+/*----------------------------------------------------------------.
+| Set the PRITNER associated to SYMBOL.  Do nothing if passed 0.  |
+`----------------------------------------------------------------*/
+
+void
+symbol_printer_set (symbol_t *symbol, char *printer, location_t location)
+{
+  if (printer)
+    {
+      if (symbol->printer)
+	complain_at (location,
+		     _("%s redeclaration for %s"),
+		     "%printer", symbol->tag);
+      symbol->printer = printer;
+      symbol->printer_location = location;
+    }
+}
+
+
 /*------------------------------------------------------------------.
 | Set the PRECEDENCE associated to SYMBOL.  Does nothing if invoked |
 | with UNDEF_ASSOC as ASSOC.                                        |
@@ -83,18 +129,20 @@ symbol_type_set (symbol_t *symbol, char *type_name)
 
 void
 symbol_precedence_set (symbol_t *symbol,
-		       int prec, associativity assoc)
+		       int prec, associativity assoc, location_t location)
 {
   if (assoc != undef_assoc)
     {
       if (symbol->prec != 0)
-	complain (_("redefining precedence of %s"), symbol->tag);
+	complain_at (location,
+		     _("redefining precedence of %s"),
+		     symbol->tag);
       symbol->prec = prec;
       symbol->assoc = assoc;
     }
 
   /* Only terminals have a precedence. */
-  symbol_class_set (symbol, token_sym);
+  symbol_class_set (symbol, token_sym, location);
 }
 
 
@@ -103,10 +151,10 @@ symbol_precedence_set (symbol_t *symbol,
 `-------------------------------------*/
 
 void
-symbol_class_set (symbol_t *symbol, symbol_class class)
+symbol_class_set (symbol_t *symbol, symbol_class class, location_t location)
 {
   if (symbol->class != unknown_sym && symbol->class != class)
-    complain (_("symbol %s redefined"), symbol->tag);
+    complain_at (location, _("symbol %s redefined"), symbol->tag);
 
   if (class == nterm_sym && symbol->class != nterm_sym)
     symbol->number = nvars++;
@@ -122,13 +170,15 @@ symbol_class_set (symbol_t *symbol, symbol_class class)
 `-------------------------------------------------*/
 
 void
-symbol_user_token_number_set (symbol_t *symbol, int user_token_number)
+symbol_user_token_number_set (symbol_t *symbol,
+			      int user_token_number, location_t location)
 {
   assert (symbol->class == token_sym);
 
   if (symbol->user_token_number != USER_NUMBER_UNDEFINED
       && symbol->user_token_number != user_token_number)
-    complain (_("redefining user token number of %s"), symbol->tag);
+    complain_at (location, _("redefining user token number of %s"),
+		 symbol->tag);
 
   symbol->user_token_number = user_token_number;
   /* User defined EOF token? */
@@ -170,8 +220,9 @@ symbol_check_defined (symbol_t *this)
 {
   if (this->class == unknown_sym)
     {
-      complain
-	(_("symbol %s is used, but is not defined as a token and has no rules"),
+      complain_at
+	(this->location,
+	 _("symbol %s is used, but is not defined as a token and has no rules"),
 	 this->tag);
       this->class = nterm_sym;
       this->number = nvars++;
@@ -363,24 +414,48 @@ symbols_new (void)
 `----------------------------------------------------------------*/
 
 symbol_t *
-getsym (const char *key)
+symbol_get (const char *key, location_t location)
 {
   symbol_t probe;
   symbol_t *entry;
 
+  /* Keep the symbol in a printable form.  */
+  key = quotearg_style (escape_quoting_style, key);
   (const char *) probe.tag = key;
   entry = hash_lookup (symbol_table, &probe);
 
   if (!entry)
     {
       /* First insertion in the hash. */
-      entry = symbol_new (key);
+      entry = symbol_new (key, location);
       hash_insert (symbol_table, entry);
     }
   return entry;
 }
 
 
+/*------------------------------------------------------------------.
+| Generate a dummy nonterminal, whose name cannot conflict with the |
+| user's names.                                                     |
+`------------------------------------------------------------------*/
+
+symbol_t *
+dummy_symbol_get (location_t location)
+{
+  /* Incremented for each generated symbol.  */
+  static int dummy_count = 0;
+  static char buf[256];
+
+  symbol_t *sym;
+
+  sprintf (buf, "@%d", ++dummy_count);
+  sym = symbol_get (buf, location);
+  sym->class = nterm_sym;
+  sym->number = nvars++;
+  return sym;
+}
+
+
 /*-------------------.
 | Free the symbols.  |
 `-------------------*/
@@ -389,6 +464,7 @@ void
 symbols_free (void)
 {
   hash_free (symbol_table);
+  free (symbols);
 }
 
 
@@ -488,7 +564,11 @@ symbols_pack (void)
   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)
-    fatal (_("the start symbol %s is a token"), startsymbol->tag);
+    fatal_at (startsymbol_location,
+	      _("the start symbol %s is a token"),
+	      startsymbol->tag);
 }