* src/Makefile.am (YACC): Use --warnings=all,error so that Bison's own

[bison.git] / src / parse-gram.y

diff --git a/src/parse-gram.y b/src/parse-gram.y
index 70356942e5c3dbeb1100f7a8429ddbe4e3f05d42..522540ac905c2d7887186d37265a232f03f96076 100644 (file)
--- a/src/parse-gram.y
+++ b/src/parse-gram.y
@@ -1,5 +1,6 @@
-/* Bison Grammar Parser                             -*- C -*-
-   Copyright (C) 2002 Free Software Foundation, Inc.
+%{/* Bison Grammar Parser                             -*- C -*-
+
+   Copyright (C) 2002, 2003, 2004, 2005, 2006 Free Software Foundation, Inc.

 
    This file is part of Bison, the GNU Compiler Compiler.
 
 
    This file is part of Bison, the GNU Compiler Compiler.
 


@@ -15,84 +16,93 @@
 
    You should have received a copy of the GNU General Public License
    along with this program; if not, write to the Free Software
 
    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

 */
 
 */
 

+#include <config.h>
+#include "system.h"

 
 

-%debug
-%defines
-%locations
-%pure-parser
-// %error-verbose
-%defines
-%name-prefix="gram_"
+#include <strverscmp.h>

 
 

-%{
-#include "system.h"

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

-#include "muscle_tab.h"
+#include "conflicts.h"

 #include "files.h"
 #include "getargs.h"
 #include "files.h"
 #include "getargs.h"

-#include "output.h"
-#include "symlist.h"

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

+#include "muscle_tab.h"
+#include "quotearg.h"

 #include "reader.h"
 #include "reader.h"

-#include "conflicts.h"
+#include "symlist.h"
+#include "scan-gram.h"
+#include "scan-code.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)

 
 

-/* Produce verbose parse errors.  */
-#define YYERROR_VERBOSE 1
-#define YYLLOC_DEFAULT(Current, Rhs, N)                        \
-do {                                                   \
-  if (N)                                               \
-  {                                                    \
-    Current.first_column  = Rhs[1].first_column;       \
-    Current.first_line    = Rhs[1].first_line;         \
-    Current.last_column   = Rhs[N].last_column;                \
-    Current.last_line     = Rhs[N].last_line;          \
-  }                                                    \
-  else                                                 \
-  {                                                    \
-    Current = Rhs[0];                                  \
-  }                                                    \
-} while (0)
-
-/* Pass the control structure to YYPARSE and YYLEX. */
-#define YYPARSE_PARAM gram_control
-#define YYLEX_PARAM gram_control
-/* YYPARSE receives GRAM_CONTROL as a void *.  Provide a
-   correctly typed access to it.  */
-#define yycontrol ((gram_control_t *) gram_control)
-
-/* Request detailed parse error messages, and pass them to GRAM_ERROR.
-   FIXME: depends on the undocumented availability of YYLLOC.t */
+static void version_check (location const *loc, char const *version);
+
+/* Request detailed syntax error messages, and pass them to GRAM_ERROR.
+   FIXME: depends on the undocumented availability of YYLLOC.  */

 #undef  yyerror
 #define yyerror(Msg) \
 #undef  yyerror
 #define yyerror(Msg) \

-        gram_error (&yylloc, Msg)
-
-#define YYPRINT(File, Type, Value) \
-        yyprint (File, Type, &Value)
-static void yyprint (FILE *file, int type, const yystype *value);
-
-symbol_class current_class = unknown_sym;
-char *current_type = 0;
-symbol_t *current_lhs;
-location_t current_lhs_location;
-assoc_t current_assoc;
-int current_prec = 0;
-braced_code_t current_braced_code = action_braced_code;
+       gram_error (&yylloc, Msg)
+static void gram_error (location const *, char const *);
+
+static char const *char_name (char);
+
+/** Add a lex-param or a parse-param.
+ *
+ * \param type  \a lex_param or \a parse_param
+ * \param decl  the formal argument
+ * \param loc   the location in the source.
+ */
+static void add_param (char const *type, char *decl, location loc);
+
+
+static symbol_class current_class = unknown_sym;
+static uniqstr current_type = NULL;
+static symbol *current_lhs;
+static location current_lhs_location;
+static int current_prec = 0;
+
+#define YYTYPE_INT16 int_fast16_t
+#define YYTYPE_INT8 int_fast8_t
+#define YYTYPE_UINT16 uint_fast16_t
+#define YYTYPE_UINT8 uint_fast8_t

 %}
 
 %}
 

+%debug
+%verbose
+%defines
+%locations
+%pure-parser
+%error-verbose
+%defines
+%name-prefix="gram_"
+%expect 0
+
+%initial-action
+{
+  /* Bison's grammar can initial empty locations, hence a default
+     location is needed. */
+  boundary_set (&@$.start, current_file, 1, 1);
+  boundary_set (&@$.end, current_file, 1, 1);
+}

 
 

-/* Only NUMBERS have a value.  */

 %union
 {
 %union
 {

-  symbol_t *symbol;
-  symbol_list_t *list;
+  symbol *symbol;
+  symbol_list *list;

   int integer;
   int integer;

-  char *string;
-  assoc_t assoc;
-  struniq_t struniq;
+  char const *chars;
+  char *code;
+  assoc assoc;
+  uniqstr uniqstr;
+  unsigned char character;

 };
 
 /* Define the tokens together with their human representation.  */
 };
 
 /* Define the tokens together with their human representation.  */


@@ -107,8 +117,6 @@ braced_code_t current_braced_code = action_braced_code;
 %token PERCENT_DESTRUCTOR  "%destructor"
 %token PERCENT_PRINTER     "%printer"
 
 %token PERCENT_DESTRUCTOR  "%destructor"
 %token PERCENT_PRINTER     "%printer"
 

-%token PERCENT_UNION       "%union"
-

 %token PERCENT_LEFT        "%left"
 %token PERCENT_RIGHT       "%right"
 %token PERCENT_NONASSOC    "%nonassoc"
 %token PERCENT_LEFT        "%left"
 %token PERCENT_RIGHT       "%right"
 %token PERCENT_NONASSOC    "%nonassoc"


@@ -123,54 +131,83 @@ braced_code_t current_braced_code = action_braced_code;
 `----------------------*/
 
 %token
 `----------------------*/
 
 %token

-  PERCENT_DEBUG         "%debug"
-  PERCENT_DEFINE        "%define"
-  PERCENT_DEFINES       "%defines"
-  PERCENT_ERROR_VERBOSE "%error-verbose"
-  PERCENT_EXPECT        "%expect"
-  PERCENT_FILE_PREFIX   "%file-prefix"
-  PERCENT_GLR_PARSER    "%glr-parser"
-  PERCENT_LEX_PARAM     "%lex-param"
-  PERCENT_LOCATIONS     "%locations"
-  PERCENT_NAME_PREFIX   "%name-prefix"
-  PERCENT_NO_LINES      "%no-lines"
-  PERCENT_OUTPUT        "%output"
-  PERCENT_PARSE_PARAM   "%parse-param"
-  PERCENT_PURE_PARSER   "%pure-parser"
-  PERCENT_SKELETON      "%skeleton"
-  PERCENT_START         "%start"
-  PERCENT_TOKEN_TABLE   "%token-table"
-  PERCENT_VERBOSE       "%verbose"
-  PERCENT_YACC          "%yacc"
+  PERCENT_CODE            "%code"
+  PERCENT_CODE_TOP        "%code-top"
+  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"
+  PERCENT_OUTPUT          "%output"
+  PERCENT_PARSE_PARAM     "%parse-param"
+  PERCENT_PROVIDES        "%provides"
+  PERCENT_PURE_PARSER     "%pure-parser"
+  PERCENT_PUSH_PARSER     "%push-parser"
+  PERCENT_REQUIRE        "%require"
+  PERCENT_REQUIRES        "%requires"
+  PERCENT_SKELETON        "%skeleton"
+  PERCENT_START           "%start"
+  PERCENT_TOKEN_TABLE     "%token-table"
+  PERCENT_VERBOSE         "%verbose"
+  PERCENT_YACC            "%yacc"

 ;
 
 ;
 

-%token TYPE            "type"
+%token BRACED_CODE     "{...}"
+%token CHAR            "char"
+%token EPILOGUE        "epilogue"

 %token EQUAL           "="
 %token EQUAL           "="

-%token SEMICOLON       ";"
-%token COLON           ":"
-%token COMMA           ","
-%token PIPE            "|"

 %token ID              "identifier"
 %token ID              "identifier"

+%token ID_COLON        "identifier:"

 %token PERCENT_PERCENT "%%"
 %token PERCENT_PERCENT "%%"

+%token PIPE            "|"

 %token PROLOGUE        "%{...%}"
 %token PROLOGUE        "%{...%}"

-%token EPILOGUE        "epilogue"
-%token BRACED_CODE     "{...}"
-
+%token SEMICOLON       ";"
+%token TYPE            "type"
+%token TYPE_TAG_ANY    "<*>"
+%token TYPE_TAG_NONE   "<!>"
+
+%type <character> CHAR
+%printer { fputs (char_name ($$), stderr); } CHAR
+
+/* braceless is not to be used for rule or symbol actions, as it
+   calls translate_code. */
+%type <chars> STRING "%{...%}" EPILOGUE braceless content content.opt
+%type <code> "{...}"
+%printer { fputs (quotearg_style (c_quoting_style, $$), stderr); }
+        STRING
+%printer { fprintf (stderr, "{\n%s\n}", $$); }
+        braceless content content.opt "{...}" "%{...%}" EPILOGUE
+
+%type <uniqstr> TYPE ID ID_COLON
+%printer { fprintf (stderr, "<%s>", $$); } TYPE
+%printer { fputs ($$, stderr); } ID
+%printer { fprintf (stderr, "%s:", $$); } ID_COLON

 
 

-%type <string> TYPE STRING string_content
-               BRACED_CODE PROLOGUE EPILOGUE epilogue.opt action

 %type <integer> INT
 %type <integer> INT

-%type <symbol> ID symbol string_as_id
+%printer { fprintf (stderr, "%d", $$); } INT
+
+%type <symbol> id id_colon symbol string_as_id
+%printer { fprintf (stderr, "%s", $$->tag); } id symbol string_as_id
+%printer { fprintf (stderr, "%s:", $$->tag); } id_colon
+

 %type <assoc> precedence_declarator
 %type <assoc> precedence_declarator

-%type <list>  symbols.1
+%type <list>  symbols.1 generic_symlist generic_symlist_item

 %%
 
 input:
 %%
 
 input:

-  declarations "%%" grammar epilogue.opt
-    {
-      yycontrol->errcode = 0;
-      epilogue_set ($4, @4);
-    }
+  prologue_declarations "%%" grammar epilogue.opt

 ;
 
 
 ;
 
 


@@ -178,34 +215,45 @@ input:
        | Declarations: before the first %%.  |
        `------------------------------------*/
 
        | Declarations: before the first %%.  |
        `------------------------------------*/
 

-declarations:
+prologue_declarations:

   /* Nothing */
   /* Nothing */

-| declarations declaration semi_colon.opt
+| prologue_declarations prologue_declaration

 ;
 
 ;
 

-declaration:
+prologue_declaration:

   grammar_declaration
   grammar_declaration

-| PROLOGUE                                 { prologue_augment ($1, @1); }
-| "%debug"                                 { debug_flag = 1; }
-| "%define" string_content string_content  { muscle_insert ($2, $3); }
-| "%defines"                               { defines_flag = 1; }
-| "%error-verbose"                         { error_verbose = 1; }
-| "%expect" INT                            { expected_conflicts = $2; }
-| "%file-prefix" "=" string_content        { spec_file_prefix = $3; }
-| "%glr-parser"                           { glr_parser = 1; }
-| "%lex-param" string_content "," string_content
-                           { muscle_pair_list_grow ("lex_param", $2, $4); }
-| "%locations"                             { locations_flag = 1; }
-| "%name-prefix" "=" string_content        { spec_name_prefix = $3; }
-| "%no-lines"                              { no_lines_flag = 1; }
-| "%output" "=" string_content             { spec_outfile = $3; }
-| "%parse-param" string_content "," string_content
-                           { muscle_pair_list_grow ("parse_param", $2, $4); }
-| "%pure-parser"                           { pure_parser = 1; }
-| "%skeleton" string_content               { skeleton = $2; }
-| "%token-table"                           { token_table_flag = 1; }
-| "%verbose"                               { report_flag = 1; }
-| "%yacc"                                  { yacc_flag = 1; }
+| "%{...%}"     { prologue_augment (translate_code ($1, @1), @1, union_seen); }
+| "%debug"                         { debug_flag = true; }
+| "%define" STRING content.opt     { muscle_insert ($2, $3); }
+| "%defines"                       { defines_flag = true; }
+| "%error-verbose"                 { error_verbose = true; }
+| "%expect" INT                    { expected_sr_conflicts = $2; }
+| "%expect-rr" INT                { expected_rr_conflicts = $2; }
+| "%file-prefix" "=" STRING        { spec_file_prefix = $3; }
+| "%glr-parser"
+    {
+      nondeterministic_parser = true;
+      glr_parser = true;
+    }
+| "%initial-action" "{...}"
+    {
+      muscle_code_grow ("initial_action", translate_symbol_action ($2, @2), @2);
+    }
+| "%lex-param" "{...}"         { add_param ("lex_param", $2, @2); }
+| "%locations"                  { locations_flag = true; }
+| "%name-prefix" "=" STRING     { spec_name_prefix = $3; }
+| "%no-lines"                   { no_lines_flag = true; }
+| "%nondeterministic-parser"   { nondeterministic_parser = true; }
+| "%output" "=" STRING          { spec_outfile = $3; }
+| "%parse-param" "{...}"       { add_param ("parse_param", $2, @2); }
+| "%pure-parser"                { pure_parser = true; }
+| "%push-parser"                { push_parser = true; }
+| "%require" STRING             { version_check (&@2, $2); }
+| "%skeleton" STRING            { skeleton = $2; }
+| "%token-table"                { token_table_flag = true; }
+| "%verbose"                    { report_flag = report_states; }
+| "%yacc"                       { yacc_flag = true; }
+| /*FIXME: Err?  What is this horror doing here? */ ";"

 ;
 
 grammar_declaration:
 ;
 
 grammar_declaration:


@@ -215,34 +263,76 @@ grammar_declaration:
     {
       grammar_start_symbol_set ($2, @2);
     }
     {
       grammar_start_symbol_set ($2, @2);
     }

-| "%union" BRACED_CODE
+| "%destructor" "{...}" generic_symlist

     {
     {

-      typed = 1;
-      MUSCLE_INSERT_INT ("stype_line", @2.first_line);
-      muscle_insert ("stype", $2);
+      symbol_list *list;
+      const char *action = translate_symbol_action ($2, @2);
+      for (list = $3; list; list = list->next)
+       symbol_list_destructor_set (list, action, @2);
+      symbol_list_free ($3);

     }
     }

-| "%destructor"
-    { current_braced_code = destructor_braced_code; }
-  BRACED_CODE symbols.1
+| "%printer" "{...}" generic_symlist

     {
     {

-      symbol_list_t *list;
-      for (list = $4; list; list = list->next)
-       symbol_destructor_set (list->sym, $3, @3);
-      symbol_list_free ($4);
-      current_braced_code = action_braced_code;
+      symbol_list *list;
+      const char *action = translate_symbol_action ($2, @2);
+      for (list = $3; list; list = list->next)
+       symbol_list_printer_set (list, action, @2);
+      symbol_list_free ($3);

     }
     }

-| "%printer"
-    { current_braced_code = printer_braced_code; }
-  BRACED_CODE symbols.1
+| "%default-prec"

     {
     {

-      symbol_list_t *list;
-      for (list = $4; list; list = list->next)
-       symbol_printer_set (list->sym, $3, list->location);
-      symbol_list_free ($4);
-      current_braced_code = action_braced_code;
+      default_prec = true;

     }
     }

+| "%no-default-prec"
+    {
+      default_prec = false;
+    }
+| "%code" braceless      { prologue_augment ($2, @2, true); }
+| "%code-top" braceless  { prologue_augment ($2, @2, false); }
+| "%provides" braceless  { muscle_code_grow ("provides", $2, @2); }
+| "%requires" braceless  { muscle_code_grow ("requires", $2, @2); }
+;
+
+
+/*----------*
+ | %union.  |
+ *----------*/
+
+%token PERCENT_UNION "%union";
+
+union_name:
+  /* Nothing. */ {}
+| ID             { muscle_code_grow ("union_name", $1, @1); }

 ;
 
 ;
 

+grammar_declaration:
+  "%union" union_name "{...}"
+    {
+      char const *body = $3;
+
+      /* Concatenate the %union bodies.  If this is the first %union, make sure
+        the synchronization line appears after the opening '{' so as not to
+        confuse Doxygen.  Otherwise, turn the previous %union's trailing '}'
+        into '\n', and omit the new %union's leading '{'.  */
+      if (!union_seen)
+       {
+         muscle_grow ("stype", "{", "");
+       }
+      else
+       {
+         char *code = muscle_find ("stype");
+         code[strlen (code) - 1] = '\n';
+       }
+      body++;
+
+      union_seen = true;
+      muscle_code_grow ("stype", body, @3);
+    }
+;
+
+
+
+

 symbol_declaration:
   "%nterm" { current_class = nterm_sym; } symbol_defs.1
     {
 symbol_declaration:
   "%nterm" { current_class = nterm_sym; } symbol_defs.1
     {


@@ -256,9 +346,10 @@ symbol_declaration:
     }
 | "%type" TYPE symbols.1
     {
     }
 | "%type" TYPE symbols.1
     {

-      symbol_list_t *list;
+      symbol_list *list;
+      tag_seen = true;

       for (list = $3; list; list = list->next)
       for (list = $3; list; list = list->next)

-       symbol_type_set (list->sym, $2, @2);
+       symbol_type_set (list->content.sym, $2, @2);

       symbol_list_free ($3);
     }
 ;
       symbol_list_free ($3);
     }
 ;


@@ -266,12 +357,12 @@ symbol_declaration:
 precedence_declaration:
   precedence_declarator type.opt symbols.1
     {
 precedence_declaration:
   precedence_declarator type.opt symbols.1
     {

-      symbol_list_t *list;
+      symbol_list *list;

       ++current_prec;
       for (list = $3; list; list = list->next)
        {
       ++current_prec;
       for (list = $3; list; list = list->next)
        {

-         symbol_type_set (list->sym, current_type, @2);
-         symbol_precedence_set (list->sym, current_prec, $1, @1);
+         symbol_type_set (list->content.sym, current_type, @2);
+         symbol_precedence_set (list->content.sym, current_prec, $1, @1);

        }
       symbol_list_free ($3);
       current_type = NULL;
        }
       symbol_list_free ($3);
       current_type = NULL;


@@ -286,14 +377,27 @@ precedence_declarator:
 
 type.opt:
   /* Nothing. */ { current_type = NULL; }
 
 type.opt:
   /* Nothing. */ { current_type = NULL; }

-| TYPE           { current_type = $1; }
+| TYPE           { current_type = $1; tag_seen = true; }

 ;
 
 ;
 

-/* One or more nonterminals to be %typed. */
-
+/* One or more symbols to be %typed. */

 symbols.1:
 symbols.1:

-  symbol            { $$ = symbol_list_new ($1, @1); }
-| symbols.1 symbol  { $$ = symbol_list_prepend ($1, $2, @2); }
+  symbol
+    { $$ = symbol_list_sym_new ($1, @1); }
+| symbols.1 symbol
+    { $$ = symbol_list_prepend ($1, symbol_list_sym_new ($2, @2)); }
+;
+
+generic_symlist:
+  generic_symlist_item { $$ = $1; }
+| generic_symlist generic_symlist_item { $$ = symbol_list_prepend ($1, $2); }
+;
+
+generic_symlist_item:
+  symbol            { $$ = symbol_list_sym_new ($1, @1); }
+| TYPE              { $$ = symbol_list_type_new ($1, @1); }
+| "<*>"             { $$ = symbol_list_default_tagged_new (@1); }
+| "<!>"             { $$ = symbol_list_default_tagless_new (@1); }

 ;
 
 /* One token definition.  */
 ;
 
 /* One token definition.  */


@@ -301,27 +405,28 @@ symbol_def:
   TYPE
      {
        current_type = $1;
   TYPE
      {
        current_type = $1;

+       tag_seen = true;

      }
      }

-| ID
+| id

      {
      {

-       symbol_class_set ($1, current_class, @1);
+       symbol_class_set ($1, current_class, @1, true);

        symbol_type_set ($1, current_type, @1);
      }
        symbol_type_set ($1, current_type, @1);
      }

-| ID INT
+| id INT

     {
     {

-      symbol_class_set ($1, current_class, @1);
+      symbol_class_set ($1, current_class, @1, true);

       symbol_type_set ($1, current_type, @1);
       symbol_user_token_number_set ($1, $2, @2);
     }
       symbol_type_set ($1, current_type, @1);
       symbol_user_token_number_set ($1, $2, @2);
     }

-| ID string_as_id
+| id string_as_id

     {
     {

-      symbol_class_set ($1, current_class, @1);
+      symbol_class_set ($1, current_class, @1, true);

       symbol_type_set ($1, current_type, @1);
       symbol_make_alias ($1, $2, @$);
     }
       symbol_type_set ($1, current_type, @1);
       symbol_make_alias ($1, $2, @$);
     }

-| ID INT string_as_id
+| id INT string_as_id

     {
     {

-      symbol_class_set ($1, current_class, @1);
+      symbol_class_set ($1, current_class, @1, true);

       symbol_type_set ($1, current_type, @1);
       symbol_user_token_number_set ($1, $2, @2);
       symbol_make_alias ($1, $3, @$);
       symbol_type_set ($1, current_type, @1);
       symbol_user_token_number_set ($1, $2, @2);
       symbol_make_alias ($1, $3, @$);


@@ -331,9 +436,7 @@ symbol_def:
 /* One or more symbol definitions. */
 symbol_defs.1:
   symbol_def
 /* One or more symbol definitions. */
 symbol_defs.1:
   symbol_def

-    {;}

 | symbol_defs.1 symbol_def
 | symbol_defs.1 symbol_def

-    {;}

 ;
 
 
 ;
 
 


@@ -347,15 +450,10 @@ grammar:
 ;
 
 /* As a Bison extension, one can use the grammar declarations in the
 ;
 
 /* As a Bison extension, one can use the grammar declarations in the

-   body of the grammar.  But to remain LALR(1), they must be ended
-   with a semi-colon.  */
+   body of the grammar.  */

 rules_or_grammar_declaration:
   rules
 | grammar_declaration ";"
 rules_or_grammar_declaration:
   rules
 | grammar_declaration ";"

-    {
-      if (yacc_flag)
-       complain_at (@$, _("POSIX forbids declarations in the grammar"));
-    }

 | error ";"
     {
       yyerrok;
 | error ";"
     {
       yyerrok;


@@ -363,21 +461,21 @@ rules_or_grammar_declaration:
 ;
 
 rules:
 ;
 
 rules:

-  ID ":" { current_lhs = $1; current_lhs_location = @1; } rhses.1 ";"
-    {;}
+  id_colon { current_lhs = $1; current_lhs_location = @1; } rhses.1

 ;
 
 rhses.1:
 ;
 
 rhses.1:

-  rhs                { grammar_rule_end (@1); }
-| rhses.1 "|" rhs    { grammar_rule_end (@3); }
+  rhs                { grammar_current_rule_end (@1); }
+| rhses.1 "|" rhs    { grammar_current_rule_end (@3); }
+| rhses.1 ";"

 ;
 
 rhs:
   /* Nothing.  */
 ;
 
 rhs:
   /* Nothing.  */

-    { grammar_rule_begin (current_lhs, current_lhs_location); }
+    { grammar_current_rule_begin (current_lhs, current_lhs_location); }

 | rhs symbol
     { grammar_current_rule_symbol_append ($2, @2); }
 | rhs symbol
     { grammar_current_rule_symbol_append ($2, @2); }

-| rhs action
+| rhs "{...}"

     { grammar_current_rule_action_append ($2, @2); }
 | rhs "%prec" symbol
     { grammar_current_rule_prec_set ($3, @3); }
     { grammar_current_rule_action_append ($2, @2); }
 | rhs "%prec" symbol
     { grammar_current_rule_prec_set ($3, @3); }


@@ -387,87 +485,199 @@ rhs:
     { grammar_current_rule_merge_set ($3, @3); }
 ;
 
     { grammar_current_rule_merge_set ($3, @3); }
 ;
 

-symbol:
-  ID              { $$ = $1; }
-| string_as_id    { $$ = $1; }
-;

 
 

-action:
-  BRACED_CODE
-   { $$ = $1; }
-;
+/*-----------*
+ | content.  |
+ *-----------*/

 
 

-/* A string used as an ID: we have to keep the quotes. */
-string_as_id:
+content:

   STRING
   STRING

+| braceless
+;
+
+/* Some content or "1" by default. */
+content.opt:
+  /* Nothing. */

     {
     {

-      $$ = symbol_get ($1, @1);
-      symbol_class_set ($$, token_sym, @1);
+      static char one[] = "1";
+      $$ = one;

     }
     }

+| content

 ;
 
 ;
 

-/* A string used for its contents.  Strip the quotes. */
-string_content:
-  STRING
+
+braceless:
+  "{...}"

     {
     {

-      $$ = $1 + 1;
-      $$[strlen ($$) - 1] = '\0';
-    };
+      $1[strlen ($1) - 1] = '\n';
+      $$ = translate_code ($1 + 1, @1);
+    }
+;

 
 
 
 

-epilogue.opt:
-  /* Nothing.  */
+/*---------------*
+ | Identifiers.  |
+ *---------------*/
+
+/* Identifiers are returned as uniqstr values by the scanner.
+   Depending on their use, we may need to make them genuine symbols.  */
+
+id:
+  ID
+    { $$ = symbol_from_uniqstr ($1, @1); }
+| CHAR

     {
     {

-      $$ = xstrdup ("");
+      $$ = symbol_get (char_name ($1), @1);
+      symbol_class_set ($$, token_sym, @1, false);
+      symbol_user_token_number_set ($$, $1, @1);

     }
     }

-| "%%" EPILOGUE
+;
+
+id_colon:
+  ID_COLON { $$ = symbol_from_uniqstr ($1, @1); }
+;
+
+
+symbol:
+  id
+| string_as_id
+;
+
+/* A string used as an ID: quote it.  */
+string_as_id:
+  STRING

     {
     {

-      $$ = $2;
+      $$ = symbol_get (quotearg_style (c_quoting_style, $1), @1);
+      symbol_class_set ($$, token_sym, @1, false);

     }
 ;
 
     }
 ;
 

-semi_colon.opt:
+epilogue.opt:

   /* Nothing.  */
   /* Nothing.  */

-| ";"
+| "%%" EPILOGUE
+    {
+      muscle_code_grow ("epilogue", translate_code ($2, @2), @2);
+      gram_scanner_last_string_free ();
+    }

 ;
 ;

+

 %%
 %%

-/*------------------------------------------------------------------.
-| When debugging the parser, display tokens' locations and values.  |
-`------------------------------------------------------------------*/
+
+
+/* Return the location of the left-hand side of a rule whose
+   right-hand side is RHS[1] ... RHS[N].  Ignore empty nonterminals in
+   the right-hand side, and return an empty location equal to the end
+   boundary of RHS[0] if the right-hand side is empty.  */
+
+static YYLTYPE
+lloc_default (YYLTYPE const *rhs, int n)
+{
+  int i;
+  YYLTYPE loc;
+
+  /* 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,
+     since empty nonterminals have the same end as their predecessors.  */
+  for (i = 1; i <= n; i++)
+    if (! equal_boundaries (rhs[i].start, rhs[i].end))
+      {
+       loc.start = rhs[i].start;
+       break;
+      }
+
+  return loc;
+}
+
+
+/* Add a lex-param or a parse-param (depending on TYPE) with
+   declaration DECL and location LOC.  */

 
 static void
 
 static void

-yyprint (FILE *file,
-         int type, const yystype *value)
+add_param (char const *type, char *decl, location loc)

 {
 {

-  fputc (' ', file);
-  switch (type)
+  static char const alphanum[26 + 26 + 1 + 10] =
+    "abcdefghijklmnopqrstuvwxyz"
+    "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
+    "_"
+    "0123456789";
+  char const *name_start = NULL;
+  char *p;
+
+  /* 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 '}', 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"));
+  else

     {
     {

-    case ID:
-      fprintf (file, " = %s", value->symbol->tag);
-      break;
-
-    case INT:
-      fprintf (file, " = %d", value->integer);
-      break;
-
-    case STRING:
-      fprintf (file, " = \"%s\"", value->string);
-      break;
-
-    case TYPE:
-      fprintf (file, " = <%s>", value->struniq);
-      break;
-
-    case BRACED_CODE:
-    case PROLOGUE:
-    case EPILOGUE:
-      fprintf (file, " = {{ %s }}", value->string);
-      break;
+      char *name;
+      size_t name_len;
+
+      for (name_len = 1;
+          memchr (alphanum, name_start[name_len], sizeof alphanum);
+          name_len++)
+       continue;
+
+      name = xmalloc (name_len + 1);
+      memcpy (name, name_start, name_len);
+      name[name_len] = '\0';
+      muscle_pair_list_grow (type, decl, name);
+      free (name);

     }
     }

+
+  gram_scanner_last_string_free ();

 }
 
 }
 

-void
-gram_error (location_t *yylloc, const char *msg)
+
+static void
+version_check (location const *loc, char const *version)
+{
+  if (strverscmp (version, PACKAGE_VERSION) > 0)
+    {
+      complain_at (*loc, "require bison %s, but have %s",
+                  version, PACKAGE_VERSION);
+      exit (63);
+    }
+}
+
+static void
+gram_error (location const *loc, char const *msg)

 {
 {

-  complain_at (*yylloc, "%s", msg);
+  complain_at (*loc, "%s", msg);
+}
+
+char const *
+token_name (int type)
+{
+  return yytname[YYTRANSLATE (type)];
+}
+
+static char const *
+char_name (char c)
+{
+  if (c == '\'')
+    return "'\\''";
+  else
+    {
+      char buf[4];
+      buf[0] = '\''; buf[1] = c; buf[2] = '\''; buf[3] = '\0';
+      return quotearg_style (escape_quoting_style, buf);
+    }

 }
 }