parser: do not convert $ and @ in code values of %define variables

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

diff --git a/src/parse-gram.y b/src/parse-gram.y
index d84a7dd0b1f34ef904f676e402bdd1e56040409b..9a266251d8111c497380a72d3b380302132d5bda 100644 (file)
--- a/src/parse-gram.y
+++ b/src/parse-gram.y
@@ -1,6 +1,6 @@
-%{/* Bison Grammar Parser                             -*- C -*-
+/* Bison Grammar Parser                             -*- C -*-

 
 

-   Copyright (C) 2002-2012 Free Software Foundation, Inc.
+   Copyright (C) 2002-2013 Free Software Foundation, Inc.

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


@@ -17,44 +17,30 @@
    You should have received a copy of the GNU General Public License
    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
 
    You should have received a copy of the GNU General Public License
    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
 

-#include <config.h>
-#include "system.h"
-
-#include "complain.h"
-#include "conflicts.h"
-#include "files.h"
-#include "getargs.h"
-#include "gram.h"
-#include "muscle-tab.h"
-#include "named-ref.h"
-#include "quotearg.h"
-#include "reader.h"
-#include "symlist.h"
-#include "symtab.h"
-#include "scan-gram.h"
-#include "scan-code.h"
-#include "xmemdup0.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)
-
-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) \
-        gram_error (&yylloc, Msg)
-static void gram_error (location const *, char const *);
-
-static char const *char_name (char);
-%}
+%code requires
+{
+  #include "symlist.h"
+  #include "symtab.h"
+}

 
 %code
 {
 
 %code
 {

+  #include <config.h>
+  #include "system.h"
+
+  #include "c-ctype.h"
+  #include "complain.h"
+  #include "conflicts.h"
+  #include "files.h"
+  #include "getargs.h"
+  #include "gram.h"
+  #include "named-ref.h"
+  #include "quotearg.h"
+  #include "reader.h"
+  #include "scan-gram.h"
+  #include "scan-code.h"
+  #include "xmemdup0.h"
+

   static int current_prec = 0;
   static location current_lhs_location;
   static named_ref *current_lhs_named_ref;
   static int current_prec = 0;
   static location current_lhs_location;
   static named_ref *current_lhs_named_ref;


@@ -65,20 +51,37 @@ static char const *char_name (char);
   /** Set the new current left-hand side symbol, possibly common
    * to several right-hand side parts of rule.
    */
   /** Set the new current left-hand side symbol, possibly common
    * to several right-hand side parts of rule.
    */

-  static
-  void
-  current_lhs(symbol *sym, location loc, named_ref *ref)
-  {
-    current_lhs_symbol = sym;
-    current_lhs_location = loc;
-    /* In order to simplify memory management, named references for lhs
-       are always assigned by deep copy into the current symbol_list
-       node.  This is because a single named-ref in the grammar may
-       result in several uses when the user factors lhs between several
-       rules using "|".  Therefore free the parser's original copy.  */
-    free (current_lhs_named_ref);
-    current_lhs_named_ref = ref;
-  }
+  static void current_lhs (symbol *sym, location loc, named_ref *ref);
+
+  #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 (Loc, File)
+
+  /* Strip initial '{' and final '}' (must be first and last characters).
+     Return the result.  */
+  static char *strip_braces (char *code);
+
+  /* Convert CODE by calling code_props_plain_init if PLAIN, otherwise
+     code_props_symbol_action_init.  Call
+     gram_scanner_last_string_free to release the latest string from
+     the scanner (should be CODE). */
+  static char const *translate_code (char *code, location loc, bool plain);
+
+  /* Convert CODE by calling code_props_plain_init after having
+     stripped the first and last characters (expected to be '{', and
+     '}').  Call gram_scanner_last_string_free to release the latest
+     string from the scanner (should be CODE). */
+  static char const *translate_code_braceless (char *code, location loc);
+
+  static void version_check (location const *loc, char const *version);
+
+  static void gram_error (location const *, char const *);
+
+  /* A string that describes a char (e.g., 'a' -> "'a'").  */
+  static char const *char_name (char);

 
   #define YYTYPE_INT16 int_fast16_t
   #define YYTYPE_INT8 int_fast8_t
 
   #define YYTYPE_INT16 int_fast16_t
   #define YYTYPE_INT8 int_fast8_t


@@ -86,15 +89,15 @@ static char const *char_name (char);
   #define YYTYPE_UINT8 uint_fast8_t
 }
 
   #define YYTYPE_UINT8 uint_fast8_t
 }
 

-%debug
-%verbose
-%defines
-%locations
-%pure-parser
-%define parse.error "verbose"
+%define api.prefix {gram_}
+%define api.pure full
+%define locations
+%define parse.error verbose

 %define parse.lac full
 %define parse.lac full

-%name-prefix="gram_"
+%define parse.trace
+%defines

 %expect 0
 %expect 0

+%verbose

 
 %initial-action
 {
 
 %initial-action
 {


@@ -104,23 +107,9 @@ static char const *char_name (char);
   boundary_set (&@$.end, current_file, 1, 1);
 }
 
   boundary_set (&@$.end, current_file, 1, 1);
 }
 

-%union
-{
-  assoc assoc;
-  char *code;
-  char const *chars;
-  int integer;
-  named_ref *named_ref;
-  symbol *symbol;
-  symbol_list *list;
-  uniqstr uniqstr;
-  unsigned char character;
-};
-

 /* Define the tokens together with their human representation.  */
 %token GRAM_EOF 0 "end of file"
 %token STRING     "string"
 /* Define the tokens together with their human representation.  */
 %token GRAM_EOF 0 "end of file"
 %token STRING     "string"

-%token INT        "integer"

 
 %token PERCENT_TOKEN       "%token"
 %token PERCENT_NTERM       "%nterm"
 
 %token PERCENT_TOKEN       "%token"
 %token PERCENT_NTERM       "%nterm"


@@ -185,34 +174,39 @@ static char const *char_name (char);
 %token TAG_ANY         "<*>"
 %token TAG_NONE        "<>"
 
 %token TAG_ANY         "<*>"
 %token TAG_NONE        "<>"
 

+%union {unsigned char character;}

 %type <character> CHAR
 %type <character> CHAR

-%printer { fputs (char_name ($$), stderr); } CHAR
+%printer { fputs (char_name ($$), yyo); } CHAR

 
 

-/* braceless is not to be used for rule or symbol actions, as it
-   calls code_props_plain_init.  */
-%type <chars> STRING "%{...%}" EPILOGUE braceless content.opt
-%type <code> "{...}" "%?{...}"
-%printer { fputs (quotearg_style (c_quoting_style, $$), stderr); }
-         STRING
-%printer { fprintf (stderr, "{\n%s\n}", $$); }
-         braceless content.opt "{...}" "%{...%}" EPILOGUE
+%union {char *code;};
+%type <code> "{...}" "%?{...}" "%{...%}" EPILOGUE STRING
+%printer { fputs (quotearg_style (c_quoting_style, $$), yyo); } STRING
+%printer { fprintf (yyo, "{\n%s\n}", $$); } <code>

 
 

+%union {uniqstr uniqstr;}

 %type <uniqstr> BRACKETED_ID ID ID_COLON PERCENT_FLAG TAG tag variable
 %type <uniqstr> BRACKETED_ID ID ID_COLON PERCENT_FLAG TAG tag variable

-%printer { fputs ($$, stderr); } <uniqstr>
-%printer { fprintf (stderr, "[%s]", $$); } BRACKETED_ID
-%printer { fprintf (stderr, "%s:", $$); } ID_COLON
-%printer { fprintf (stderr, "%%%s", $$); } PERCENT_FLAG
-%printer { fprintf (stderr, "<%s>", $$); } TAG tag
+%printer { fputs ($$, yyo); } <uniqstr>
+%printer { fprintf (yyo, "[%s]", $$); } BRACKETED_ID
+%printer { fprintf (yyo, "%s:", $$); } ID_COLON
+%printer { fprintf (yyo, "%%%s", $$); } PERCENT_FLAG
+%printer { fprintf (yyo, "<%s>", $$); } TAG tag

 
 

-%type <integer> INT
-%printer { fprintf (stderr, "%d", $$); } <integer>
+%union {int integer;};
+%token <integer> INT "integer"
+%printer { fprintf (yyo, "%d", $$); } <integer>

 
 

+%union {symbol *symbol;}

 %type <symbol> id id_colon string_as_id symbol symbol.prec
 %type <symbol> id id_colon string_as_id symbol symbol.prec

-%printer { fprintf (stderr, "%s", $$->tag); } <symbol>
-%printer { fprintf (stderr, "%s:", $$->tag); } id_colon
+%printer { fprintf (yyo, "%s", $$->tag); } <symbol>
+%printer { fprintf (yyo, "%s:", $$->tag); } id_colon

 
 

+%union {assoc assoc;};

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

+
+%union {symbol_list *list;}

 %type <list>  symbols.1 symbols.prec generic_symlist generic_symlist_item
 %type <list>  symbols.1 symbols.prec generic_symlist generic_symlist_item

+
+%union {named_ref *named_ref;}

 %type <named_ref> named_ref.opt
 
 /*---------.
 %type <named_ref> named_ref.opt
 
 /*---------.


@@ -220,8 +214,6 @@ static char const *char_name (char);
 `---------*/
 %code requires
 {
 `---------*/
 %code requires
 {

-# ifndef PARAM_TYPE
-#  define PARAM_TYPE

   typedef enum
   {
     param_none   = 0,
   typedef enum
   {
     param_none   = 0,


@@ -229,7 +221,6 @@ static char const *char_name (char);
     param_parse  = 1 << 1,
     param_both   = param_lex | param_parse
   } param_type;
     param_parse  = 1 << 1,
     param_both   = param_lex | param_parse
   } param_type;

-# endif

 };
 %code
 {
 };
 %code
 {


@@ -242,20 +233,17 @@ static char const *char_name (char);
   static void add_param (param_type type, char *decl, location loc);
   static param_type current_param = param_none;
 };
   static void add_param (param_type type, char *decl, location loc);
   static param_type current_param = param_none;
 };

-%union
-{
-  param_type param;
-}
+%union {param_type param;}

 %token <param> PERCENT_PARAM "%param";
 %printer
 {
   switch ($$)
     {
 #define CASE(In, Out)                                           \
 %token <param> PERCENT_PARAM "%param";
 %printer
 {
   switch ($$)
     {
 #define CASE(In, Out)                                           \

-      case param_ ## In: fputs ("%" #Out, stderr); break
-      CASE(lex,   lex-param);
-      CASE(parse, parse-param);
-      CASE(both,  param);
+      case param_ ## In: fputs ("%" #Out, yyo); break
+      CASE (lex,   lex-param);
+      CASE (parse, parse-param);
+      CASE (both,  param);

 #undef CASE
       case param_none: aver (false); break;
     }
 #undef CASE
       case param_none: aver (false); break;
     }


@@ -277,7 +265,7 @@ input:
         `------------------------------------*/
 
 prologue_declarations:
         `------------------------------------*/
 
 prologue_declarations:

-  /* Nothing */
+  %empty

 | prologue_declarations prologue_declaration
 ;
 
 | prologue_declarations prologue_declaration
 ;
 


@@ -285,21 +273,17 @@ prologue_declaration:
   grammar_declaration
 | "%{...%}"
     {
   grammar_declaration
 | "%{...%}"
     {

-      code_props plain_code;
-      code_props_plain_init (&plain_code, $1, @1);
-      code_props_translate_code (&plain_code);
-      gram_scanner_last_string_free ();

       muscle_code_grow (union_seen ? "post_prologue" : "pre_prologue",
       muscle_code_grow (union_seen ? "post_prologue" : "pre_prologue",

-                        plain_code.code, @1);
+                        translate_code ($1, @1, true), @1);

       code_scanner_last_string_free ();
     }
 | "%<flag>"
     {
       muscle_percent_define_ensure ($1, @1, true);
     }
       code_scanner_last_string_free ();
     }
 | "%<flag>"
     {
       muscle_percent_define_ensure ($1, @1, true);
     }

-| "%define" variable content.opt
+| "%define" variable value

     {
     {

-      muscle_percent_define_insert ($2, @2, $3,
+      muscle_percent_define_insert ($2, @2, $3.kind, $3.chars,

                                     MUSCLE_PERCENT_DEFINE_GRAMMAR_FILE);
     }
 | "%defines"                       { defines_flag = true; }
                                     MUSCLE_PERCENT_DEFINE_GRAMMAR_FILE);
     }
 | "%defines"                       { defines_flag = true; }


@@ -310,13 +294,13 @@ prologue_declaration:
     }
 | "%error-verbose"
     {
     }
 | "%error-verbose"
     {

-      muscle_percent_define_insert ("parse.error", @1, "verbose",
+      muscle_percent_define_insert ("parse.error", @1, muscle_keyword,
+                                    "verbose",

                                     MUSCLE_PERCENT_DEFINE_GRAMMAR_FILE);
     }
 | "%expect" INT                    { expected_sr_conflicts = $2; }
 | "%expect-rr" INT                 { expected_rr_conflicts = $2; }
 | "%file-prefix" STRING            { spec_file_prefix = $2; }
                                     MUSCLE_PERCENT_DEFINE_GRAMMAR_FILE);
     }
 | "%expect" INT                    { expected_sr_conflicts = $2; }
 | "%expect-rr" INT                 { expected_rr_conflicts = $2; }
 | "%file-prefix" STRING            { spec_file_prefix = $2; }

-| "%file-prefix" "=" STRING        { spec_file_prefix = $3; } /* deprecated */

 | "%glr-parser"
     {
       nondeterministic_parser = true;
 | "%glr-parser"
     {
       nondeterministic_parser = true;


@@ -324,20 +308,14 @@ prologue_declaration:
     }
 | "%initial-action" "{...}"
     {
     }
 | "%initial-action" "{...}"
     {

-      code_props action;
-      code_props_symbol_action_init (&action, $2, @2);
-      code_props_translate_code (&action);
-      gram_scanner_last_string_free ();
-      muscle_code_grow ("initial_action", action.code, @2);
+      muscle_code_grow ("initial_action", translate_code ($2, @2, false), @2);

       code_scanner_last_string_free ();
     }
 | "%language" STRING            { language_argmatch ($2, grammar_prio, @1); }
 | "%name-prefix" STRING         { spec_name_prefix = $2; }
       code_scanner_last_string_free ();
     }
 | "%language" STRING            { language_argmatch ($2, grammar_prio, @1); }
 | "%name-prefix" STRING         { spec_name_prefix = $2; }

-| "%name-prefix" "=" STRING     { spec_name_prefix = $3; } /* deprecated */

 | "%no-lines"                   { no_lines_flag = true; }
 | "%nondeterministic-parser"    { nondeterministic_parser = true; }
 | "%output" STRING              { spec_outfile = $2; }
 | "%no-lines"                   { no_lines_flag = true; }
 | "%nondeterministic-parser"    { nondeterministic_parser = true; }
 | "%output" STRING              { spec_outfile = $2; }

-| "%output" "=" STRING          { spec_outfile = $3; }  /* deprecated */

 | "%param" { current_param = $1; } params { current_param = param_none; }
 | "%require" STRING             { version_check (&@2, $2); }
 | "%skeleton" STRING
 | "%param" { current_param = $1; } params { current_param = param_none; }
 | "%require" STRING             { version_check (&@2, $2); }
 | "%skeleton" STRING


@@ -389,10 +367,15 @@ grammar_declaration:
     }
 | code_props_type "{...}" generic_symlist
     {
     }
 | code_props_type "{...}" generic_symlist
     {

-      symbol_list *list;
-      for (list = $3; list; list = list->next)
-        symbol_list_code_props_set (list, $1, @2, $2);
-      symbol_list_free ($3);
+      code_props code;
+      code_props_symbol_action_init (&code, $2, @2);
+      code_props_translate_code (&code);
+      {
+        symbol_list *list;
+        for (list = $3; list; list = list->next)
+          symbol_list_code_props_set (list, $1, &code);
+        symbol_list_free ($3);
+      }

     }
 | "%default-prec"
     {
     }
 | "%default-prec"
     {


@@ -402,23 +385,24 @@ grammar_declaration:
     {
       default_prec = false;
     }
     {
       default_prec = false;
     }

-| "%code" braceless
+| "%code" "{...}"

     {
       /* Do not invoke muscle_percent_code_grow here since it invokes
          muscle_user_name_list_grow.  */
     {
       /* Do not invoke muscle_percent_code_grow here since it invokes
          muscle_user_name_list_grow.  */

-      muscle_code_grow ("percent_code()", $2, @2);
+      muscle_code_grow ("percent_code()",
+                        translate_code_braceless ($2, @2), @2);

       code_scanner_last_string_free ();
     }
       code_scanner_last_string_free ();
     }

-| "%code" ID braceless
+| "%code" ID "{...}"

     {
     {

-      muscle_percent_code_grow ($2, @2, $3, @3);
+      muscle_percent_code_grow ($2, @2, translate_code_braceless ($3, @3), @3);

       code_scanner_last_string_free ();
     }
 ;
 
 %type <code_type> code_props_type;
 %union {code_props_type code_type;};
       code_scanner_last_string_free ();
     }
 ;
 
 %type <code_type> code_props_type;
 %union {code_props_type code_type;};

-%printer { fprintf (stderr, "%s", code_props_type_string ($$)); } <code_type>;
+%printer { fprintf (yyo, "%s", code_props_type_string ($$)); } <code_type>;

 code_props_type:
   "%destructor"  { $$ = destructor; }
 | "%printer"     { $$ = printer; }
 code_props_type:
   "%destructor"  { $$ = destructor; }
 | "%printer"     { $$ = printer; }


@@ -431,15 +415,15 @@ code_props_type:
 %token PERCENT_UNION "%union";
 
 union_name:
 %token PERCENT_UNION "%union";
 
 union_name:

-  /* Nothing. */ {}
-| ID             { muscle_code_grow ("union_name", $1, @1); }
+  %empty {}
+| ID     { muscle_code_grow ("union_name", $1, @1); }

 ;
 
 grammar_declaration:
 ;
 
 grammar_declaration:

-  "%union" union_name braceless
+  "%union" union_name "{...}"

     {
       union_seen = true;
     {
       union_seen = true;

-      muscle_code_grow ("stype", $3, @3);
+      muscle_code_grow ("union_members", translate_code_braceless ($3, @3), @3);

       code_scanner_last_string_free ();
     }
 ;
       code_scanner_last_string_free ();
     }
 ;


@@ -491,8 +475,8 @@ precedence_declarator:
 ;
 
 tag.opt:
 ;
 
 tag.opt:

-  /* Nothing. */ { current_type = NULL; }
-| TAG            { current_type = $1; tag_seen = true; }
+  %empty { current_type = NULL; }
+| TAG    { current_type = $1; tag_seen = true; }

 ;
 
 /* Just like symbols.1 but accept INT for the sake of POSIX.  */
 ;
 
 /* Just like symbols.1 but accept INT for the sake of POSIX.  */


@@ -500,12 +484,21 @@ symbols.prec:
   symbol.prec
     { $$ = symbol_list_sym_new ($1, @1); }
 | symbols.prec symbol.prec
   symbol.prec
     { $$ = symbol_list_sym_new ($1, @1); }
 | symbols.prec symbol.prec

-    { $$ = symbol_list_prepend ($1, symbol_list_sym_new ($2, @2)); }
+    { $$ = symbol_list_append ($1, symbol_list_sym_new ($2, @2)); }

 ;
 
 symbol.prec:
 ;
 
 symbol.prec:

-  symbol     { $$ = $1; }
-| symbol INT { $$ = $1; symbol_user_token_number_set ($1, $2, @2); }
+  symbol
+    {
+      $$ = $1;
+      symbol_class_set ($1, token_sym, @1, false);
+    }
+| symbol INT
+    {
+      $$ = $1;
+      symbol_user_token_number_set ($1, $2, @2);
+      symbol_class_set ($1, token_sym, @1, false);
+    }

 ;
 
 /* One or more symbols to be %typed. */
 ;
 
 /* One or more symbols to be %typed. */


@@ -513,12 +506,12 @@ symbols.1:
   symbol
     { $$ = symbol_list_sym_new ($1, @1); }
 | symbols.1 symbol
   symbol
     { $$ = symbol_list_sym_new ($1, @1); }
 | symbols.1 symbol

-    { $$ = symbol_list_prepend ($1, symbol_list_sym_new ($2, @2)); }
+    { $$ = symbol_list_append ($1, symbol_list_sym_new ($2, @2)); }

 ;
 
 generic_symlist:
   generic_symlist_item { $$ = $1; }
 ;
 
 generic_symlist:
   generic_symlist_item { $$ = $1; }

-| generic_symlist generic_symlist_item { $$ = symbol_list_prepend ($1, $2); }
+| generic_symlist generic_symlist_item { $$ = symbol_list_append ($1, $2); }

 ;
 
 generic_symlist_item:
 ;
 
 generic_symlist_item:


@@ -535,15 +528,15 @@ tag:
 /* One token definition.  */
 symbol_def:
   TAG
 /* One token definition.  */
 symbol_def:
   TAG

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

 | id
 | id

-     {
-       symbol_class_set ($1, current_class, @1, true);
-       symbol_type_set ($1, current_type, @1);
-     }
+    {
+      symbol_class_set ($1, current_class, @1, true);
+      symbol_type_set ($1, current_type, @1);
+    }

 | id INT
     {
       symbol_class_set ($1, current_class, @1, true);
 | id INT
     {
       symbol_class_set ($1, current_class, @1, true);


@@ -606,8 +599,9 @@ rhses.1:
 | rhses.1 ";"
 ;
 
 | rhses.1 ";"
 ;
 

+%token PERCENT_EMPTY "%empty";

 rhs:
 rhs:

-  /* Nothing.  */
+  %empty

     { grammar_current_rule_begin (current_lhs_symbol, current_lhs_location,
                                   current_lhs_named_ref); }
 | rhs symbol named_ref.opt
     { grammar_current_rule_begin (current_lhs_symbol, current_lhs_location,
                                   current_lhs_named_ref); }
 | rhs symbol named_ref.opt


@@ -616,6 +610,8 @@ rhs:
     { grammar_current_rule_action_append ($2, @2, $3, false); }
 | rhs "%?{...}"
     { grammar_current_rule_action_append ($2, @2, NULL, true); }
     { grammar_current_rule_action_append ($2, @2, $3, false); }
 | rhs "%?{...}"
     { grammar_current_rule_action_append ($2, @2, NULL, true); }

+| rhs "%empty"
+    { grammar_current_rule_empty_set (@2); }

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


@@ -625,44 +621,47 @@ rhs:
 ;
 
 named_ref.opt:
 ;
 
 named_ref.opt:

-  /* Nothing. */ { $$ = 0; }
-|
-  BRACKETED_ID   { $$ = named_ref_new($1, @1); }
+  %empty         { $$ = 0; }
+| BRACKETED_ID   { $$ = named_ref_new($1, @1); }

 ;
 
 ;
 

-/*---------------------------.
-| variable and content.opt.  |
-`---------------------------*/
+/*---------------------.
+| variable and value.  |
+`---------------------*/

 
 /* The STRING form of variable is deprecated and is not M4-friendly.
 
 /* The STRING form of variable is deprecated and is not M4-friendly.

-   For example, M4 fails for `%define "[" "value"'.  */
+   For example, M4 fails for '%define "[" "value"'.  */

 variable:
   ID
 | STRING { $$ = uniqstr_new ($1); }
 ;
 
 /* Some content or empty by default. */
 variable:
   ID
 | STRING { $$ = uniqstr_new ($1); }
 ;
 
 /* Some content or empty by default. */

-content.opt:
-  /* Nothing. */   { $$ = ""; }
-| ID { $$ = $1; }
-| STRING
-;
-
-
-/*------------.
-| braceless.  |
-`------------*/
-
-braceless:
-  "{...}"
+%code requires {#include "muscle-tab.h"};
+%union
+{
+  struct
+  {
+    char const *chars;
+    muscle_kind kind;
+  } value;
+};
+%type <value> value;
+%printer
+{
+  switch ($$.kind)

     {
     {

-      code_props plain_code;
-      $1[strlen ($1) - 1] = '\n';
-      code_props_plain_init (&plain_code, $1+1, @1);
-      code_props_translate_code (&plain_code);
-      gram_scanner_last_string_free ();
-      $$ = plain_code.code;
+    case muscle_code:    fprintf (yyo,  "{%s}",  $$.chars); break;
+    case muscle_keyword: fprintf (yyo,   "%s",   $$.chars); break;
+    case muscle_string:  fprintf (yyo, "\"%s\"", $$.chars); break;

     }
     }

+} <value>;
+
+value:
+  %empty  { $$.kind = muscle_keyword; $$.chars = ""; }
+| ID      { $$.kind = muscle_keyword; $$.chars = $1; }
+| STRING  { $$.kind = muscle_string;  $$.chars = $1; }
+| "{...}" { $$.kind = muscle_code;    $$.chars = strip_braces ($1); }

 ;
 
 
 ;
 
 


@@ -704,21 +703,16 @@ string_as_id:
 ;
 
 epilogue.opt:
 ;
 
 epilogue.opt:

-  /* Nothing.  */
+  %empty

 | "%%" EPILOGUE
     {
 | "%%" EPILOGUE
     {

-      code_props plain_code;
-      code_props_plain_init (&plain_code, $2, @2);
-      code_props_translate_code (&plain_code);
-      gram_scanner_last_string_free ();
-      muscle_code_grow ("epilogue", plain_code.code, @2);
+      muscle_code_grow ("epilogue", translate_code ($2, @2, true), @2);

       code_scanner_last_string_free ();
     }
 ;
 
 %%
 
       code_scanner_last_string_free ();
     }
 ;
 
 %%
 

-

 /* 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
 /* 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


@@ -748,6 +742,33 @@ lloc_default (YYLTYPE const *rhs, int n)
   return loc;
 }
 
   return loc;
 }
 

+static
+char *strip_braces (char *code)
+{
+  code[strlen(code) - 1] = 0;
+  return code + 1;
+}
+
+static
+char const *
+translate_code (char *code, location loc, bool plain)
+{
+  code_props plain_code;
+  if (plain)
+    code_props_plain_init (&plain_code, code, loc);
+  else
+    code_props_symbol_action_init (&plain_code, code, loc);
+  code_props_translate_code (&plain_code);
+  gram_scanner_last_string_free ();
+  return plain_code.code;
+}
+
+static
+char const *
+translate_code_braceless (char *code, location loc)
+{
+  return translate_code (strip_braces (code), loc, true);
+}

 
 static void
 add_param (param_type type, char *decl, location loc)
 
 static void
 add_param (param_type type, char *decl, location loc)


@@ -770,16 +791,17 @@ add_param (param_type type, char *decl, location loc)
 
     /* Strip the surrounding '{' and '}', and any blanks just inside
        the braces.  */
 
     /* Strip the surrounding '{' and '}', and any blanks just inside
        the braces.  */

-    while (*--p == ' ' || *p == '\t')
-      continue;
+    --p;
+  while (c_isspace ((unsigned char) *p))
+      --p;

     p[1] = '\0';
     p[1] = '\0';

-    while (*++decl == ' ' || *decl == '\t')
-      continue;
+    ++decl;
+  while (c_isspace ((unsigned char) *decl))
+      ++decl;

   }
 
   if (! name_start)
   }
 
   if (! name_start)

-    complain_at (loc, complaint,
-                 _("missing identifier in parameter declaration"));
+    complain (&loc, complaint, _("missing identifier in parameter declaration"));

   else
     {
       char *name = xmemdup0 (name_start, strspn (name_start, alphanum));
   else
     {
       char *name = xmemdup0 (name_start, strspn (name_start, alphanum));


@@ -799,8 +821,8 @@ version_check (location const *loc, char const *version)
 {
   if (strverscmp (version, PACKAGE_VERSION) > 0)
     {
 {
   if (strverscmp (version, PACKAGE_VERSION) > 0)
     {

-      complain_at (*loc, complaint, "require bison %s, but have %s",
-                   version, PACKAGE_VERSION);
+      complain (loc, complaint, "require bison %s, but have %s",
+                version, PACKAGE_VERSION);

       exit (EX_MISMATCH);
     }
 }
       exit (EX_MISMATCH);
     }
 }


@@ -808,7 +830,7 @@ version_check (location const *loc, char const *version)
 static void
 gram_error (location const *loc, char const *msg)
 {
 static void
 gram_error (location const *loc, char const *msg)
 {

-  complain_at (*loc, complaint, "%s", msg);
+  complain (loc, complaint, "%s", msg);

 }
 
 char const *
 }
 
 char const *


@@ -829,3 +851,18 @@ char_name (char c)
       return quotearg_style (escape_quoting_style, buf);
     }
 }
       return quotearg_style (escape_quoting_style, buf);
     }
 }

+
+static
+void
+current_lhs (symbol *sym, location loc, named_ref *ref)
+{
+  current_lhs_symbol = sym;
+  current_lhs_location = loc;
+  /* In order to simplify memory management, named references for lhs
+     are always assigned by deep copy into the current symbol_list
+     node.  This is because a single named-ref in the grammar may
+     result in several uses when the user factors lhs between several
+     rules using "|".  Therefore free the parser's original copy.  */
+  free (current_lhs_named_ref);
+  current_lhs_named_ref = ref;
+}