style: rename internal "stype" as "union_members" for clarity

[bison.git] / data / c.m4

diff --git a/data/c.m4 b/data/c.m4
index dc3d303616d7e3c746756ccf7252de28e9b67fa6..f145c737055823425fb51aca40c223ce17ee04ed 100644 (file)
--- a/data/c.m4
+++ b/data/c.m4
@@ -2,7 +2,7 @@
 
 # C M4 Macros for Bison.
 
 
 # C M4 Macros for Bison.
 

-# Copyright (C) 2002, 2004-2012 Free Software Foundation, Inc.
+# Copyright (C) 2002, 2004-2013 Free Software Foundation, Inc.

 
 # This program is free software: you can redistribute it and/or modify
 # it under the terms of the GNU General Public License as published by
 
 # This program is free software: you can redistribute it and/or modify
 # it under the terms of the GNU General Public License as published by


@@ -51,12 +51,6 @@ m4_define([b4_cpp_guard_close],
 ## Identification.  ##
 ## ---------------- ##
 
 ## Identification.  ##
 ## ---------------- ##
 

-# b4_comment(TEXT)
-# ----------------
-m4_define([b4_comment], [/* m4_bpatsubst([$1], [
-], [
-   ])  */])
-

 # b4_identification
 # -----------------
 # Depends on individual skeletons to define b4_pure_flag, b4_push_flag, or
 # b4_identification
 # -----------------
 # Depends on individual skeletons to define b4_pure_flag, b4_push_flag, or


@@ -110,10 +104,27 @@ m4_define_default([b4_union_name], [b4_api_PREFIX[]STYPE])
 ## Pure/impure interfaces.  ##
 ## ------------------------ ##
 
 ## Pure/impure interfaces.  ##
 ## ------------------------ ##
 

+# b4_lex_formals
+# --------------
+# All the yylex formal arguments.
+# b4_lex_param arrives quoted twice, but we want to keep only one level.
+m4_define([b4_lex_formals],
+[b4_pure_if([[[[YYSTYPE *yylvalp]], [[&yylval]]][]dnl
+b4_locations_if([, [[YYLTYPE *yyllocp], [&yylloc]]])])dnl
+m4_ifdef([b4_lex_param], [, ]b4_lex_param)])
+
+
+# b4_lex
+# ------
+# Call yylex.
+m4_define([b4_lex],
+[b4_function_call([yylex], [int], b4_lex_formals)])
+
+

 # b4_user_args
 # ------------
 m4_define([b4_user_args],
 # b4_user_args
 # ------------
 m4_define([b4_user_args],

-[m4_ifset([b4_parse_param], [, b4_c_args(b4_parse_param)])])
+[m4_ifset([b4_parse_param], [, b4_args(b4_parse_param)])])

 
 
 # b4_parse_param
 
 
 # b4_parse_param


@@ -137,11 +148,13 @@ m4_popdef([$2])dnl
 m4_popdef([$1])dnl
 ])])
 
 m4_popdef([$1])dnl
 ])])
 

-# b4_parse_param_use
-# ------------------
-# `YYUSE' all the parse-params.
+# b4_parse_param_use([VAL], [LOC])
+# --------------------------------
+# `YYUSE' VAL, LOC if locations are enabled, and all the parse-params.

 m4_define([b4_parse_param_use],
 m4_define([b4_parse_param_use],

-[b4_parse_param_for([Decl], [Formal], [  YYUSE (Formal);
+[m4_ifvaln([$1], [  YYUSE ([$1]);])dnl
+b4_locations_if([m4_ifvaln([$2], [  YYUSE ([$2]);])])dnl
+b4_parse_param_for([Decl], [Formal], [  YYUSE (Formal);

 ])dnl
 ])
 
 ])dnl
 ])
 


@@ -178,12 +191,11 @@ m4_define([b4_int_type_for],
 # --------------------------------------------
 # Without inducing a comparison warning from the compiler, check if the
 # literal value LITERAL equals VALUE from table TABLE, which must have
 # --------------------------------------------
 # Without inducing a comparison warning from the compiler, check if the
 # literal value LITERAL equals VALUE from table TABLE, which must have

-# TABLE_min and TABLE_max defined.  YYID must be defined as an identity
-# function that suppresses warnings about constant conditions.
+# TABLE_min and TABLE_max defined.

 m4_define([b4_table_value_equals],
 [m4_if(m4_eval($3 < m4_indir([b4_]$1[_min])
                || m4_indir([b4_]$1[_max]) < $3), [1],
 m4_define([b4_table_value_equals],
 [m4_if(m4_eval($3 < m4_indir([b4_]$1[_min])
                || m4_indir([b4_]$1[_max]) < $3), [1],

-       [[YYID (0)]],
+       [[0]],

        [(!!(($2) == ($3)))])])
 
 
        [(!!(($2) == ($3)))])])
 
 


@@ -212,191 +224,148 @@ m4_define([b4_null_define],
 # Return a null pointer constant.
 m4_define([b4_null], [YY_NULL])
 
 # Return a null pointer constant.
 m4_define([b4_null], [YY_NULL])
 

+# b4_integral_parser_table_define(TABLE-NAME, CONTENT, COMMENT)
+# -------------------------------------------------------------
+# Define "yy<TABLE-NAME>" whose contents is CONTENT.
+m4_define([b4_integral_parser_table_define],
+[m4_ifvaln([$3], [b4_comment([$3], [  ])])dnl
+static const b4_int_type_for([$2]) yy$1[[]] =
+{
+  $2
+};dnl
+])

 
 
 ## ------------------------- ##
 ## Assigning token numbers.  ##
 ## ------------------------- ##
 
 
 
 ## ------------------------- ##
 ## Assigning token numbers.  ##
 ## ------------------------- ##
 

-# b4_token_define(TOKEN-NAME, TOKEN-NUMBER)
-# -----------------------------------------
+# b4_token_define(TOKEN-NUM)
+# --------------------------

 # Output the definition of this token as #define.
 m4_define([b4_token_define],
 # Output the definition of this token as #define.
 m4_define([b4_token_define],

-[#define $1 $2
-])
+[b4_token_format([#define %s %s], [$1])])

 
 

-
-# b4_token_defines(LIST-OF-PAIRS-TOKEN-NAME-TOKEN-NUMBER)
-# -------------------------------------------------------
-# Output the definition of the tokens (if there are) as #defines.
+# b4_token_defines
+# ----------------
+# Output the definition of the tokens.

 m4_define([b4_token_defines],
 m4_define([b4_token_defines],

-[m4_if([$#$1], [1], [],
-[/* Tokens.  */
-m4_map([b4_token_define], [$@])])
-])
+[b4_any_token_visible_if([/* Tokens.  */
+m4_join([
+], b4_symbol_map([b4_token_define]))
+])])

 
 
 
 

-# b4_token_enum(TOKEN-NAME, TOKEN-NUMBER)
-# ---------------------------------------
+# b4_token_enum(TOKEN-NUM)
+# ------------------------

 # Output the definition of this token as an enum.
 m4_define([b4_token_enum],
 # Output the definition of this token as an enum.
 m4_define([b4_token_enum],

-[$1 = $2])
+[b4_token_format([%s = %s], [$1])])

 
 
 
 

-# b4_token_enums(LIST-OF-PAIRS-TOKEN-NAME-TOKEN-NUMBER)
-# -----------------------------------------------------
+# b4_token_enums
+# --------------

 # Output the definition of the tokens (if there are) as enums.
 m4_define([b4_token_enums],
 # Output the definition of the tokens (if there are) as enums.
 m4_define([b4_token_enums],

-[m4_if([$#$1], [1], [],
-[[/* Tokens.  */
+[b4_any_token_visible_if([[/* Token type.  */

 #ifndef ]b4_api_PREFIX[TOKENTYPE
 # define ]b4_api_PREFIX[TOKENTYPE
 #ifndef ]b4_api_PREFIX[TOKENTYPE
 # define ]b4_api_PREFIX[TOKENTYPE

-   /* Put the tokens into the symbol table, so that GDB and other debuggers
-      know about them.  */
-   enum ]b4_api_prefix[tokentype {
-]m4_map_sep([     b4_token_enum], [,
-],
-           [$@])[
-   };
+  enum ]b4_api_prefix[tokentype
+  {
+    ]m4_join([,
+    ],
+             b4_symbol_map([b4_token_enum]))[
+  };

 #endif
 ]])])
 
 
 #endif
 ]])])
 
 

-# b4_token_enums_defines(LIST-OF-PAIRS-TOKEN-NAME-TOKEN-NUMBER)
-# -------------------------------------------------------------
-# Output the definition of the tokens (if there are any) as enums and, if POSIX
-# Yacc is enabled, as #defines.
+# b4_token_enums_defines
+# ----------------------
+# Output the definition of the tokens (if there are any) as enums and,
+# if POSIX Yacc is enabled, as #defines.

 m4_define([b4_token_enums_defines],
 m4_define([b4_token_enums_defines],

-[b4_token_enums($@)b4_yacc_if([b4_token_defines($@)], [])
-])
+[b4_token_enums[]b4_yacc_if([b4_token_defines])])

 
 
 
 

+## ----------------- ##
+## Semantic Values.  ##
+## ----------------- ##

 
 

-## --------------------------------------------- ##
-## Defining C functions in both K&R and ANSI-C.  ##
-## --------------------------------------------- ##

 
 

+# b4_symbol_value(VAL, [TYPE])
+# ----------------------------
+# Given a semantic value VAL ($$, $1 etc.), extract its value of type
+# TYPE if TYPE is given, otherwise just return VAL.  The result can be
+# used safetly, it is put in parens to avoid nasty precedence issues.
+# TYPE is *not* put in braces, provide some if needed.
+m4_define([b4_symbol_value],
+[($1[]m4_ifval([$2], [.$2]))])

 
 

-# b4_modern_c
-# -----------
-# A predicate useful in #if to determine whether C is ancient or modern.
-#
-# If __STDC__ is defined, the compiler is modern.  IBM xlc 7.0 when run
-# as 'cc' doesn't define __STDC__ (or __STDC_VERSION__) for pedantic
-# reasons, but it defines __C99__FUNC__ so check that as well.
-# Microsoft C normally doesn't define these macros, but it defines _MSC_VER.
-# Consider a C++ compiler to be modern if it defines __cplusplus.
-#
-m4_define([b4_c_modern],
-  [[(defined __STDC__ || defined __C99__FUNC__ \
-     || defined __cplusplus || defined _MSC_VER)]])

 
 

-# b4_c_function_def(NAME, RETURN-VALUE, [DECL1, NAME1], ...)
-# ----------------------------------------------------------
-# Declare the function NAME.
-m4_define([b4_c_function_def],
-[#if b4_c_modern
-b4_c_ansi_function_def($@)
-#else
-$2
-$1 (b4_c_knr_formal_names(m4_shift2($@)))
-b4_c_knr_formal_decls(m4_shift2($@))
-#endif[]dnl
-])

 
 

+## ---------------------- ##
+## Defining C functions.  ##
+## ---------------------- ##

 
 

-# b4_c_ansi_function_def(NAME, RETURN-VALUE, [DECL1, NAME1], ...)
-# ---------------------------------------------------------------
-# Declare the function NAME in ANSI.
-m4_define([b4_c_ansi_function_def],
+
+# b4_function_define(NAME, RETURN-VALUE, [DECL1, NAME1], ...)
+# -----------------------------------------------------------
+# Declare the function NAME in C.
+m4_define([b4_function_define],

 [$2
 [$2

-$1 (b4_c_ansi_formals(m4_shift2($@)))[]dnl
+$1 (b4_formals(m4_shift2($@)))[]dnl

 ])
 
 
 ])
 
 

-# b4_c_ansi_formals([DECL1, NAME1], ...)
-# --------------------------------------
-# Output the arguments ANSI-C definition.
-m4_define([b4_c_ansi_formals],
+# b4_formals([DECL1, NAME1], ...)
+# -------------------------------
+# The formal arguments of a C function definition.
+m4_define([b4_formals],

 [m4_if([$#], [0], [void],
        [$#$1], [1], [void],
 [m4_if([$#], [0], [void],
        [$#$1], [1], [void],

-               [m4_map_sep([b4_c_ansi_formal], [, ], [$@])])])
+               [m4_map_sep([b4_formal], [, ], [$@])])])

 
 

-m4_define([b4_c_ansi_formal],
+m4_define([b4_formal],

 [$1])
 
 
 [$1])
 
 

-# b4_c_knr_formal_names([DECL1, NAME1], ...)
-# ------------------------------------------
-# Output the argument names.
-m4_define([b4_c_knr_formal_names],
-[m4_map_sep([b4_c_knr_formal_name], [, ], [$@])])
-
-m4_define([b4_c_knr_formal_name],
-[$2])
-
-
-# b4_c_knr_formal_decls([DECL1, NAME1], ...)
-# ------------------------------------------
-# Output the K&R argument declarations.
-m4_define([b4_c_knr_formal_decls],
-[m4_map_sep([b4_c_knr_formal_decl],
-            [
-],
-            [$@])])
-
-m4_define([b4_c_knr_formal_decl],
-[    $1;])

 
 

+## ----------------------- ##
+## Declaring C functions.  ##
+## ----------------------- ##

 
 
 
 

-## ------------------------------------------------------------ ##
-## Declaring (prototyping) C functions in both K&R and ANSI-C.  ##
-## ------------------------------------------------------------ ##
-
-
-# b4_c_ansi_function_decl(NAME, RETURN-VALUE, [DECL1, NAME1], ...)
-# ----------------------------------------------------------------
-# Declare the function NAME ANSI C style.
-m4_define([b4_c_ansi_function_decl],
-[$2 $1 (b4_c_ansi_formals(m4_shift2($@)));[]dnl
+# b4_function_declare(NAME, RETURN-VALUE, [DECL1, NAME1], ...)
+# ------------------------------------------------------------
+# Declare the function NAME.
+m4_define([b4_function_declare],
+[$2 $1 (b4_formals(m4_shift2($@)));[]dnl

 ])
 
 
 
 ])
 
 
 

-# b4_c_function_decl(NAME, RETURN-VALUE, [DECL1, NAME1], ...)
-# -----------------------------------------------------------
-# Declare the function NAME in both K&R and ANSI C.
-m4_define([b4_c_function_decl],
-[#if defined __STDC__ || defined __cplusplus
-b4_c_ansi_function_decl($@)
-#else
-$2 $1 ();
-#endif[]dnl
-])
-
-

 
 ## --------------------- ##
 ## Calling C functions.  ##
 ## --------------------- ##
 
 
 
 ## --------------------- ##
 ## Calling C functions.  ##
 ## --------------------- ##
 
 

-# b4_c_function_call(NAME, RETURN-VALUE, [DECL1, NAME1], ...)
+# b4_function_call(NAME, RETURN-VALUE, [DECL1, NAME1], ...)

 # -----------------------------------------------------------
 # Call the function NAME with arguments NAME1, NAME2 etc.
 # -----------------------------------------------------------
 # Call the function NAME with arguments NAME1, NAME2 etc.

-m4_define([b4_c_function_call],
-[$1 (b4_c_args(m4_shift2($@)))[]dnl
+m4_define([b4_function_call],
+[$1 (b4_args(m4_shift2($@)))[]dnl

 ])
 
 
 ])
 
 

-# b4_c_args([DECL1, NAME1], ...)
-# ------------------------------
+# b4_args([DECL1, NAME1], ...)
+# ----------------------------

 # Output the arguments NAME1, NAME2...
 # Output the arguments NAME1, NAME2...

-m4_define([b4_c_args],
-[m4_map_sep([b4_c_arg], [, ], [$@])])
+m4_define([b4_args],
+[m4_map_sep([b4_arg], [, ], [$@])])

 
 

-m4_define([b4_c_arg],
+m4_define([b4_arg],

 [$2])
 
 
 [$2])
 
 


@@ -405,7 +374,7 @@ m4_define([b4_c_arg],
 ## ----------- ##
 
 # b4_sync_start(LINE, FILE)
 ## ----------- ##
 
 # b4_sync_start(LINE, FILE)

-# -----------------------
+# -------------------------

 m4_define([b4_sync_start], [[#]line $1 $2])
 
 
 m4_define([b4_sync_start], [[#]line $1 $2])
 
 


@@ -418,39 +387,28 @@ m4_define([b4_sync_start], [[#]line $1 $2])
 m4_define([b4_case],
 [  case $1:
 $2
 m4_define([b4_case],
 [  case $1:
 $2

+b4_syncline([@oline@], [@ofile@])

     break;])
 
     break;])
 

-# b4_symbol_actions(FILENAME, LINENO,
-#                   SYMBOL-TAG, SYMBOL-NUM,
-#                   SYMBOL-ACTION, SYMBOL-TYPENAME)
-# -------------------------------------------------
-# Issue the code for a symbol action (e.g., %printer).
-#
-# Define b4_dollar_dollar([TYPE-NAME]), and b4_at_dollar, which are
-# invoked where $<TYPE-NAME>$ and @$ were specified by the user.
-m4_define([b4_symbol_actions],
-[b4_dollar_pushdef([(*yyvaluep)], [$6], [(*yylocationp)])dnl
-      case $4: /* $3 */
-b4_syncline([$2], [$1])
-        $5;
+
+# b4_predicate_case(LABEL, CONDITIONS)
+# ------------------------------------
+m4_define([b4_predicate_case],
+[  case $1:
+    if (! ($2)) YYERROR;

 b4_syncline([@oline@], [@ofile@])
 b4_syncline([@oline@], [@ofile@])

-        break;
-b4_dollar_popdef[]dnl
-])
+    break;])

 
 
 
 

-# b4_yydestruct_generate(FUNCTION-DECLARATOR)
-# -------------------------------------------
-# Generate the "yydestruct" function, which declaration is issued using
-# FUNCTION-DECLARATOR, which may be "b4_c_ansi_function_def" for ISO C
-# or "b4_c_function_def" for K&R.
-m4_define_default([b4_yydestruct_generate],
+# b4_yydestruct_define
+# --------------------
+# Define the "yydestruct" function.
+m4_define_default([b4_yydestruct_define],

 [[/*-----------------------------------------------.
 | Release the memory associated to this symbol.  |
 `-----------------------------------------------*/
 
 [[/*-----------------------------------------------.
 | Release the memory associated to this symbol.  |
 `-----------------------------------------------*/
 

-/*ARGSUSED*/
-]$1([yydestruct],
+]b4_function_define([yydestruct],

     [static void],
     [[const char *yymsg],    [yymsg]],
     [[int yytype],           [yytype]],
     [static void],
     [[const char *yymsg],    [yymsg]],
     [[int yytype],           [yytype]],


@@ -458,38 +416,31 @@ m4_define_default([b4_yydestruct_generate],
 b4_locations_if(            [, [[YYLTYPE *yylocationp], [yylocationp]]])[]dnl
 m4_ifset([b4_parse_param], [, b4_parse_param]))[
 {
 b4_locations_if(            [, [[YYLTYPE *yylocationp], [yylocationp]]])[]dnl
 m4_ifset([b4_parse_param], [, b4_parse_param]))[
 {

-  YYUSE (yyvaluep);
-]b4_locations_if([  YYUSE (yylocationp);
-])dnl
-b4_parse_param_use[]dnl
-[
-  if (!yymsg)
+]b4_parse_param_use([yyvaluep], [yylocationp])dnl
+[  if (!yymsg)

     yymsg = "Deleting";
   YY_SYMBOL_PRINT (yymsg, yytype, yyvaluep, yylocationp);
 
   switch (yytype)
     {
     yymsg = "Deleting";
   YY_SYMBOL_PRINT (yymsg, yytype, yyvaluep, yylocationp);
 
   switch (yytype)
     {

-]m4_map([b4_symbol_actions], m4_defn([b4_symbol_destructors]))[
-      default:
+]b4_symbol_foreach([b4_symbol_destructor])dnl
+[      default:

         break;
     }
 }]dnl
 ])
 
 
         break;
     }
 }]dnl
 ])
 
 

-# b4_yy_symbol_print_generate(FUNCTION-DECLARATOR)
-# ------------------------------------------------
-# Generate the "yy_symbol_print" function, which declaration is issued using
-# FUNCTION-DECLARATOR, which may be "b4_c_ansi_function_def" for ISO C
-# or "b4_c_function_def" for K&R.
-m4_define_default([b4_yy_symbol_print_generate],
+# b4_yy_symbol_print_define
+# -------------------------
+# Define the "yy_symbol_print" function.
+m4_define_default([b4_yy_symbol_print_define],

 [[
 /*--------------------------------.
 | Print this symbol on YYOUTPUT.  |
 `--------------------------------*/
 
 [[
 /*--------------------------------.
 | Print this symbol on YYOUTPUT.  |
 `--------------------------------*/
 

-/*ARGSUSED*/
-]$1([yy_symbol_value_print],
+]b4_function_define([yy_symbol_value_print],

     [static void],
                [[FILE *yyoutput],                       [yyoutput]],
                [[int yytype],                           [yytype]],
     [static void],
                [[FILE *yyoutput],                       [yyoutput]],
                [[int yytype],                           [yytype]],


@@ -498,21 +449,19 @@ b4_locations_if([, [[YYLTYPE const * const yylocationp], [yylocationp]]])[]dnl
 m4_ifset([b4_parse_param], [, b4_parse_param]))[
 {
   FILE *yyo = yyoutput;
 m4_ifset([b4_parse_param], [, b4_parse_param]))[
 {
   FILE *yyo = yyoutput;

-  YYUSE (yyo);
-  if (!yyvaluep)
-    return;
-]b4_locations_if([  YYUSE (yylocationp);
-])dnl
-b4_parse_param_use[]dnl
-[# ifdef YYPRINT
+]b4_parse_param_use([yyo], [yylocationp])dnl
+[  if (!yyvaluep)
+    return;]
+dnl glr.c does not feature yytoknum.
+m4_if(b4_skeleton, ["yacc.c"],
+[[# ifdef YYPRINT

   if (yytype < YYNTOKENS)
     YYPRINT (yyoutput, yytoknum[yytype], *yyvaluep);
   if (yytype < YYNTOKENS)
     YYPRINT (yyoutput, yytoknum[yytype], *yyvaluep);

-# else
-  YYUSE (yyoutput);

 # endif
 # endif

-  switch (yytype)
+]])dnl
+[  switch (yytype)

     {
     {

-]m4_map([b4_symbol_actions], m4_defn([b4_symbol_printers]))dnl
+]b4_symbol_foreach([b4_symbol_printer])dnl

 [      default:
         break;
     }
 [      default:
         break;
     }


@@ -523,7 +472,7 @@ b4_parse_param_use[]dnl
 | Print this symbol on YYOUTPUT.  |
 `--------------------------------*/
 
 | Print this symbol on YYOUTPUT.  |
 `--------------------------------*/
 

-]$1([yy_symbol_print],
+]b4_function_define([yy_symbol_print],

     [static void],
                [[FILE *yyoutput],                       [yyoutput]],
                [[int yytype],                           [yytype]],
     [static void],
                [[FILE *yyoutput],                       [yyoutput]],
                [[int yytype],                           [yytype]],


@@ -531,10 +480,8 @@ b4_parse_param_use[]dnl
 b4_locations_if([, [[YYLTYPE const * const yylocationp], [yylocationp]]])[]dnl
 m4_ifset([b4_parse_param], [, b4_parse_param]))[
 {
 b4_locations_if([, [[YYLTYPE const * const yylocationp], [yylocationp]]])[]dnl
 m4_ifset([b4_parse_param], [, b4_parse_param]))[
 {

-  if (yytype < YYNTOKENS)
-    YYFPRINTF (yyoutput, "token %s (", yytname[yytype]);
-  else
-    YYFPRINTF (yyoutput, "nterm %s (", yytname[yytype]);
+  YYFPRINTF (yyoutput, "%s %s (",
+             yytype < YYNTOKENS ? "token" : "nterm", yytname[yytype]);

 
 ]b4_locations_if([  YY_LOCATION_PRINT (yyoutput, *yylocationp);
   YYFPRINTF (yyoutput, ": ");
 
 ]b4_locations_if([  YY_LOCATION_PRINT (yyoutput, *yylocationp);
   YYFPRINTF (yyoutput, ": ");


@@ -549,59 +496,75 @@ b4_locations_if([, yylocationp])[]b4_user_args[);
 ## Declarations.  ##
 ## -------------- ##
 
 ## Declarations.  ##
 ## -------------- ##
 

-# b4_declare_yylstype
-# -------------------
-# Declarations that might either go into the header (if --defines) or
-# in the parser body.  Declare YYSTYPE/YYLTYPE, and yylval/yylloc.
-m4_define([b4_declare_yylstype],
-[[#if ! defined ]b4_api_PREFIX[STYPE && ! defined ]b4_api_PREFIX[STYPE_IS_DECLARED
-]m4_ifdef([b4_stype],
-[[typedef union ]b4_union_name[
+# b4_value_type_define
+# --------------------
+m4_define([b4_value_type_define],
+[[/* Value type.  */
+#if ! defined ]b4_api_PREFIX[STYPE && ! defined ]b4_api_PREFIX[STYPE_IS_DECLARED
+]m4_ifdef([b4_union_members],
+[[typedef union ]b4_union_name[ ]b4_api_PREFIX[STYPE;
+union ]b4_union_name[

 {
 {

-]b4_user_stype[
-} ]b4_api_PREFIX[STYPE;
+]b4_user_union_members[
+};

 # define ]b4_api_PREFIX[STYPE_IS_TRIVIAL 1]],
 [m4_if(b4_tag_seen_flag, 0,
 [[typedef int ]b4_api_PREFIX[STYPE;
 # define ]b4_api_PREFIX[STYPE_IS_TRIVIAL 1]])])[
 # define ]b4_api_PREFIX[STYPE_IS_TRIVIAL 1]],
 [m4_if(b4_tag_seen_flag, 0,
 [[typedef int ]b4_api_PREFIX[STYPE;
 # define ]b4_api_PREFIX[STYPE_IS_TRIVIAL 1]])])[

-# define ]b4_api_prefix[stype ]b4_api_PREFIX[STYPE /* obsolescent; will be withdrawn */

 # define ]b4_api_PREFIX[STYPE_IS_DECLARED 1
 # define ]b4_api_PREFIX[STYPE_IS_DECLARED 1

-#endif]b4_locations_if([[
+#endif
+]])
+

 
 

+# b4_location_type_define
+# -----------------------
+m4_define([b4_location_type_define],
+[[/* Location type.  */

 #if ! defined ]b4_api_PREFIX[LTYPE && ! defined ]b4_api_PREFIX[LTYPE_IS_DECLARED
 #if ! defined ]b4_api_PREFIX[LTYPE && ! defined ]b4_api_PREFIX[LTYPE_IS_DECLARED

-typedef struct ]b4_api_PREFIX[LTYPE
+typedef struct ]b4_api_PREFIX[LTYPE ]b4_api_PREFIX[LTYPE;
+struct ]b4_api_PREFIX[LTYPE

 {
   int first_line;
   int first_column;
   int last_line;
   int last_column;
 {
   int first_line;
   int first_column;
   int last_line;
   int last_column;

-} ]b4_api_PREFIX[LTYPE;
-# define ]b4_api_prefix[ltype ]b4_api_PREFIX[LTYPE /* obsolescent; will be withdrawn */
+};

 # define ]b4_api_PREFIX[LTYPE_IS_DECLARED 1
 # define ]b4_api_PREFIX[LTYPE_IS_TRIVIAL 1
 # define ]b4_api_PREFIX[LTYPE_IS_DECLARED 1
 # define ]b4_api_PREFIX[LTYPE_IS_TRIVIAL 1

-#endif]])
+#endif
+]])
+
+
+# b4_declare_yylstype
+# -------------------
+# Declarations that might either go into the header (if --defines) or
+# in the parser body.  Declare YYSTYPE/YYLTYPE, and yylval/yylloc.
+m4_define([b4_declare_yylstype],
+[b4_value_type_define[]b4_locations_if([
+b4_location_type_define])

 
 b4_pure_if([], [[extern ]b4_api_PREFIX[STYPE ]b4_prefix[lval;
 ]b4_locations_if([[extern ]b4_api_PREFIX[LTYPE ]b4_prefix[lloc;]])])[]dnl
 ])
 
 
 b4_pure_if([], [[extern ]b4_api_PREFIX[STYPE ]b4_prefix[lval;
 ]b4_locations_if([[extern ]b4_api_PREFIX[LTYPE ]b4_prefix[lloc;]])])[]dnl
 ])
 

+

 # b4_YYDEBUG_define
 # ------------------
 m4_define([b4_YYDEBUG_define],
 # b4_YYDEBUG_define
 # ------------------
 m4_define([b4_YYDEBUG_define],

-[[/* Enabling traces.  */
+[[/* Debug traces.  */

 ]m4_if(b4_api_prefix, [yy],
 [[#ifndef YYDEBUG
 ]m4_if(b4_api_prefix, [yy],
 [[#ifndef YYDEBUG

-# define YYDEBUG ]b4_debug_flag[
+# define YYDEBUG ]b4_parse_trace_if([1], [0])[

 #endif]],
 [[#ifndef ]b4_api_PREFIX[DEBUG
 # if defined YYDEBUG
 #endif]],
 [[#ifndef ]b4_api_PREFIX[DEBUG
 # if defined YYDEBUG

-#  if YYDEBUG
+#if YYDEBUG

 #   define ]b4_api_PREFIX[DEBUG 1
 #  else
 #   define ]b4_api_PREFIX[DEBUG 0
 #  endif
 # else /* ! defined YYDEBUG */
 #   define ]b4_api_PREFIX[DEBUG 1
 #  else
 #   define ]b4_api_PREFIX[DEBUG 0
 #  endif
 # else /* ! defined YYDEBUG */

-#  define ]b4_api_PREFIX[DEBUG ]b4_debug_flag[
+#  define ]b4_api_PREFIX[DEBUG ]b4_parse_trace_if([1], [0])[

 # endif /* ! defined YYDEBUG */
 #endif  /* ! defined ]b4_api_PREFIX[DEBUG */]])[]dnl
 ])
 # endif /* ! defined YYDEBUG */
 #endif  /* ! defined ]b4_api_PREFIX[DEBUG */]])[]dnl
 ])


@@ -626,7 +589,7 @@ m4_define([b4_yylloc_default_define],
 #ifndef YYLLOC_DEFAULT
 # define YYLLOC_DEFAULT(Current, Rhs, N)                                \
     do                                                                  \
 #ifndef YYLLOC_DEFAULT
 # define YYLLOC_DEFAULT(Current, Rhs, N)                                \
     do                                                                  \

-      if (YYID (N))                                                     \
+      if (N)                                                            \

         {                                                               \
           (Current).first_line   = YYRHSLOC (Rhs, 1).first_line;        \
           (Current).first_column = YYRHSLOC (Rhs, 1).first_column;      \
         {                                                               \
           (Current).first_line   = YYRHSLOC (Rhs, 1).first_line;        \
           (Current).first_column = YYRHSLOC (Rhs, 1).first_column;      \


@@ -640,7 +603,7 @@ m4_define([b4_yylloc_default_define],
           (Current).first_column = (Current).last_column =              \
             YYRHSLOC (Rhs, 0).last_column;                              \
         }                                                               \
           (Current).first_column = (Current).last_column =              \
             YYRHSLOC (Rhs, 0).last_column;                              \
         }                                                               \

-    while (YYID (0))
+    while (0)

 #endif
 ]])
 
 #endif
 ]])
 


@@ -659,7 +622,7 @@ m4_define([b4_yy_location_print_define],
 /* Print *YYLOCP on YYO.  Private, do not rely on its existence. */
 
 __attribute__((__unused__))
 /* Print *YYLOCP on YYO.  Private, do not rely on its existence. */
 
 __attribute__((__unused__))

-]b4_c_function_def([yy_location_print_],
+]b4_function_define([yy_location_print_],

     [static unsigned],
                [[FILE *yyo],                    [yyo]],
                [[YYLTYPE const * const yylocp], [yylocp]])[
     [static unsigned],
                [[FILE *yyo],                    [yyo]],
                [[YYLTYPE const * const yylocp], [yylocp]])[


@@ -668,20 +631,20 @@ __attribute__((__unused__))
   int end_col = 0 != yylocp->last_column ? yylocp->last_column - 1 : 0;
   if (0 <= yylocp->first_line)
     {
   int end_col = 0 != yylocp->last_column ? yylocp->last_column - 1 : 0;
   if (0 <= yylocp->first_line)
     {

-      res += fprintf (yyo, "%d", yylocp->first_line);
+      res += YYFPRINTF (yyo, "%d", yylocp->first_line);

       if (0 <= yylocp->first_column)
       if (0 <= yylocp->first_column)

-        res += fprintf (yyo, ".%d", yylocp->first_column);
+        res += YYFPRINTF (yyo, ".%d", yylocp->first_column);

     }
   if (0 <= yylocp->last_line)
     {
       if (yylocp->first_line < yylocp->last_line)
         {
     }
   if (0 <= yylocp->last_line)
     {
       if (yylocp->first_line < yylocp->last_line)
         {

-          res += fprintf (yyo, "-%d", yylocp->last_line);
+          res += YYFPRINTF (yyo, "-%d", yylocp->last_line);

           if (0 <= end_col)
           if (0 <= end_col)

-            res += fprintf (yyo, ".%d", end_col);
+            res += YYFPRINTF (yyo, ".%d", end_col);

         }
       else if (0 <= end_col && yylocp->first_column < end_col)
         }
       else if (0 <= end_col && yylocp->first_column < end_col)

-        res += fprintf (yyo, "-%d", end_col);
+        res += YYFPRINTF (yyo, "-%d", end_col);

     }
   return res;
  }
     }
   return res;
  }