X-Git-Url: https://git.saurik.com/bison.git/blobdiff_plain/cd3684cfa8e5b6faa2ce00330a6d84bd04d165d4..2cbd078f5153288a39cbf046231a3870df8170cb:/src/parse-gram.y?ds=inline

diff --git a/src/parse-gram.y b/src/parse-gram.y
index 42c5e96e..6a98d202 100644
--- a/src/parse-gram.y
+++ b/src/parse-gram.y
@@ -1,6 +1,6 @@
-/* Bison Grammar Parser                             -*- C -*-
+%{/* Bison Grammar Parser                             -*- C -*-
 
-   Copyright (C) 2002, 2003 Free Software Foundation, Inc.
+   Copyright (C) 2002, 2003, 2004, 2005 Free Software Foundation, Inc.
 
    This file is part of Bison, the GNU Compiler Compiler.
 
@@ -16,20 +16,10 @@
 
    You should have received a copy of the GNU General Public License
    along with this program; if not, write to the Free Software
-   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
-   02111-1307  USA
+   Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+   02110-1301  USA
 */
 
-
-%debug
-%defines
-%locations
-%pure-parser
-%error-verbose
-%defines
-%name-prefix="gram_"
-
-%{
 #include "system.h"
 
 #include "complain.h"
@@ -39,12 +29,16 @@
 #include "gram.h"
 #include "muscle_tab.h"
 #include "output.h"
+#include "quotearg.h"
 #include "reader.h"
 #include "symlist.h"
 
 #define YYLLOC_DEFAULT(Current, Rhs, N)  (Current) = lloc_default (Rhs, N)
 static YYLTYPE lloc_default (YYLTYPE const *, int);
 
+#define YY_LOCATION_PRINT(File, Loc) \
+          location_print (File, Loc)
+
 /* Request detailed syntax error messages, and pass them to GRAM_ERROR.
    FIXME: depends on the undocumented availability of YYLLOC.  */
 #undef  yyerror
@@ -66,6 +60,14 @@ assoc current_assoc;
 int current_prec = 0;
 %}
 
+%debug
+%defines
+%locations
+%pure-parser
+%error-verbose
+%defines
+%name-prefix="gram_"
+
 %initial-action
 {
   /* Bison's grammar can initial empty locations, hence a default
@@ -115,16 +117,19 @@ int current_prec = 0;
 
 %token
   PERCENT_DEBUG           "%debug"
+  PERCENT_DEFAULT_PREC    "%default-prec"
   PERCENT_DEFINE          "%define"
   PERCENT_DEFINES         "%defines"
   PERCENT_ERROR_VERBOSE   "%error-verbose"
   PERCENT_EXPECT          "%expect"
+  PERCENT_EXPECT_RR	  "%expect-rr"
   PERCENT_FILE_PREFIX     "%file-prefix"
   PERCENT_GLR_PARSER      "%glr-parser"
   PERCENT_INITIAL_ACTION  "%initial-action {...}"
   PERCENT_LEX_PARAM       "%lex-param {...}"
   PERCENT_LOCATIONS       "%locations"
   PERCENT_NAME_PREFIX     "%name-prefix"
+  PERCENT_NO_DEFAULT_PREC "%no-default-prec"
   PERCENT_NO_LINES        "%no-lines"
   PERCENT_NONDETERMINISTIC_PARSER
                           "%nondeterministic-parser"
@@ -187,7 +192,8 @@ declaration:
 | "%define" string_content string_content  { muscle_insert ($2, $3); }
 | "%defines"                               { defines_flag = true; }
 | "%error-verbose"                         { error_verbose = true; }
-| "%expect" INT                            { expected_conflicts = $2; }
+| "%expect" INT                            { expected_sr_conflicts = $2; }
+| "%expect-rr" INT 			   { expected_rr_conflicts = $2; }
 | "%file-prefix" "=" string_content        { spec_file_prefix = $3; }
 | "%glr-parser"
   {
@@ -240,6 +246,14 @@ grammar_declaration:
 	symbol_printer_set (list->sym, $1, list->location);
       symbol_list_free ($2);
     }
+| "%default-prec"
+    {
+      default_prec = true;
+    }
+| "%no-default-prec"
+    {
+      default_prec = false;
+    }
 ;
 
 symbol_declaration:
@@ -390,25 +404,23 @@ symbol:
 
 action:
   BRACED_CODE
-   { $$ = $1; }
+    { $$ = $1; }
 ;
 
-/* A string used as an ID: we have to keep the quotes. */
+/* A string used as an ID: quote it.  */
 string_as_id:
   STRING
     {
-      $$ = symbol_get ($1, @1);
+      $$ = symbol_get (quotearg_style (c_quoting_style, $1), @1);
       symbol_class_set ($$, token_sym, @1);
     }
 ;
 
-/* A string used for its contents.  Strip the quotes. */
+/* A string used for its contents.  Don't quote it.  */
 string_content:
   STRING
-    {
-      $$ = $1 + 1;
-      $$[strlen ($$) - 1] = '\0';
-    };
+    { $$ = $1; }
+;
 
 
 epilogue.opt:
@@ -433,7 +445,11 @@ lloc_default (YYLTYPE const *rhs, int n)
 {
   int i;
   YYLTYPE loc;
-  loc.start = loc.end = rhs[n].end;
+
+  /* SGI MIPSpro 7.4.1m miscompiles "loc.start = loc.end = rhs[n].end;".
+     The bug is fixed in 7.4.2m, but play it safe for now.  */
+  loc.start = rhs[n].end;
+  loc.end = rhs[n].end;
 
   /* Ignore empty nonterminals the start of the the right-hand side.
      Do not bother to ignore them at the end of the right-hand side,
@@ -455,22 +471,28 @@ lloc_default (YYLTYPE const *rhs, int n)
 static void
 add_param (char const *type, char *decl, location loc)
 {
-  static char const alphanum[] =
-    "0123456789"
+  static char const alphanum[26 + 26 + 1 + 10] =
     "abcdefghijklmnopqrstuvwxyz"
     "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
-    "_";
-  char const *alpha = alphanum + 10;
+    "_"
+    "0123456789";
   char const *name_start = NULL;
   char *p;
 
-  for (p = decl; *p; p++)
-    if ((p == decl || ! strchr (alphanum, p[-1])) && strchr (alpha, p[0]))
+  /* Stop on last actual character.  */
+  for (p = decl; p[1]; p++)
+    if ((p == decl
+	 || ! memchr (alphanum, p[-1], sizeof alphanum))
+	&& memchr (alphanum, p[0], sizeof alphanum - 10))
       name_start = p;
 
-  /* Strip the surrounding '{' and '}'.  */
-  decl++;
-  p[-1] = '\0';
+  /* Strip the surrounding '{' and '}', and any blanks just inside
+     the braces.  */
+  while (*--p == ' ' || *p == '\t')
+    continue;
+  p[1] = '\0';
+  while (*++decl == ' ' || *decl == '\t')
+    continue;
 
   if (! name_start)
     complain_at (loc, _("missing identifier in parameter declaration"));
@@ -480,7 +502,7 @@ add_param (char const *type, char *decl, location loc)
       size_t name_len;
 
       for (name_len = 1;
-	   name_start[name_len] && strchr (alphanum, name_start[name_len]);
+	   memchr (alphanum, name_start[name_len], sizeof alphanum);
 	   name_len++)
 	continue;