(Torturing the Scanner): Don't invoke "cc a.c b.c

[bison.git] / data / c.m4

diff --git a/data/c.m4 b/data/c.m4
index 370d8e48051fbb76e3913964e364a512acf1f2d1..dcc0f1770bbbd71a259930498cf92eff616143dc 100644 (file)
--- a/data/c.m4
+++ b/data/c.m4
@@ -19,14 +19,14 @@ m4_divert(-1)                                               -*- Autoconf -*-
 # 02111-1307  USA
 
 
 # 02111-1307  USA
 
 

-## ----------- ##
-## Copyright.  ##
-## ----------- ##
+## ---------------- ##
+## Identification.  ##
+## ---------------- ##

 
 # b4_copyright(TITLE, YEARS)
 # --------------------------
 m4_define([b4_copyright],
 
 # b4_copyright(TITLE, YEARS)
 # --------------------------
 m4_define([b4_copyright],

-[/* A Bison parser, made from b4_filename, by GNU bison b4_version.  */
+[/* A Bison parser, made by GNU Bison b4_version.  */

 
 /* $1,
    Copyright (C) $2 Free Software Foundation, Inc.
 
 /* $1,
    Copyright (C) $2 Free Software Foundation, Inc.


@@ -47,6 +47,53 @@ m4_define([b4_copyright],
    Boston, MA 02111-1307, USA.  */])
 
 
    Boston, MA 02111-1307, USA.  */])
 
 

+# b4_identification
+# -----------------
+m4_define([b4_identification],
+[/* Identify Bison output.  */
+[#]define YYBISON 1
+
+/* Skeleton name.  */
+[#]define YYSKELETON_NAME b4_skeleton
+
+/* Pure parsers.  */
+[#]define YYPURE b4_pure
+
+/* Using locations.  */
+[#]define YYLSP_NEEDED b4_locations_flag
+])
+
+
+
+## ---------------- ##
+## Default values.  ##
+## ---------------- ##
+
+m4_define_default([b4_epilogue], [])
+
+
+
+## ------------------------ ##
+## Pure/impure interfaces.  ##
+## ------------------------ ##
+
+
+# b4_user_args
+# ------------
+m4_define([b4_user_args],
+[m4_ifset([b4_parse_param], [, b4_c_args(b4_parse_param)])])
+
+
+# b4_parse_param
+# --------------
+# If defined, b4_parse_param arrives double quoted, but below we prefer
+# it to be single quoted.
+m4_define_default([b4_parse_param])
+m4_define([b4_parse_param],
+b4_parse_param))
+
+
+

 ## ------------ ##
 ## Data Types.  ##
 ## ------------ ##
 ## ------------ ##
 ## Data Types.  ##
 ## ------------ ##


@@ -65,7 +112,7 @@ m4_define([b4_ints_in],
 # MIN to MAX (included).
 m4_define([b4_int_type],
 [m4_if(b4_ints_in($@,      [0],   [255]), [1], [unsigned char],
 # MIN to MAX (included).
 m4_define([b4_int_type],
 [m4_if(b4_ints_in($@,      [0],   [255]), [1], [unsigned char],

-       b4_ints_in($@,   [-128],   [127]), [1], [yysigned_char],
+       b4_ints_in($@,   [-128],   [127]), [1], [signed char],

 
        b4_ints_in($@,      [0], [65535]), [1], [unsigned short],
        b4_ints_in($@, [-32768], [32767]), [1], [short],
 
        b4_ints_in($@,      [0], [65535]), [1], [unsigned short],
        b4_ints_in($@, [-32768], [32767]), [1], [short],


@@ -74,6 +121,7 @@ m4_define([b4_int_type],
 
                                               [int])])
 
 
                                               [int])])
 

+

 # b4_int_type_for(NAME)
 # ---------------------
 # Return the smallest int type able to handle numbers ranging from
 # b4_int_type_for(NAME)
 # ---------------------
 # Return the smallest int type able to handle numbers ranging from


@@ -82,6 +130,30 @@ m4_define([b4_int_type_for],
 [b4_int_type($1_min, $1_max)])
 
 
 [b4_int_type($1_min, $1_max)])
 
 

+## ------------------ ##
+## Decoding options.  ##
+## ------------------ ##
+
+
+# b4_location_if(IF-TRUE, IF-FALSE)
+# ---------------------------------
+# Expand IF-TRUE, if locations are used, IF-FALSE otherwise.
+m4_define([b4_location_if],
+[m4_if(b4_locations_flag, [1],
+       [$1],
+       [$2])])
+
+
+# b4_pure_if(IF-TRUE, IF-FALSE)
+# -----------------------------
+# Expand IF-TRUE, if %pure-parser, IF-FALSE otherwise.
+m4_define([b4_pure_if],
+[m4_if(b4_pure, [1],
+       [$1],
+       [$2])])
+
+
+

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


@@ -122,100 +194,219 @@ m4_map([b4_token_define], [$@])
 ])
 
 
 ])
 
 

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

 
 

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

 
 

-# b4_c_function_call(NAME, RETURN-VALUE, [TYPE1, NAME1], ...)
-# -----------------------------------------------------------
-# Call the function NAME with arguments NAME1, NAME2 etc.
-m4_define([b4_c_function_call],
-[$1 (b4_c_args(m4_shiftn(2, $@)))[]dnl
+
+# b4_c_function_def(NAME, RETURN-VALUE, [DECL1, NAME1], ...)
+# ----------------------------------------------------------
+# Declare the function NAME.
+m4_define([b4_c_function_def],
+[#if defined (__STDC__) || defined (__cplusplus)
+b4_c_ansi_function_def($@)
+#else
+$2
+$1 (b4_c_knr_formal_names(m4_shiftn(2, $@)))
+b4_c_knr_formal_decls(m4_shiftn(2, $@))
+#endif[]dnl

 ])
 
 
 ])
 
 

-# b4_c_args([TYPE1, NAME1], ...)
-# ------------------------------
-# Output the arguments NAME1, NAME2...
-m4_define([b4_c_args],
-[m4_map_sep([b4_c_arg], [, ], [$@])])
+# b4_c_ansi_function_def(NAME, RETURN-VALUE, [DECL1, NAME1], ...)
+# ---------------------------------------------------------------
+# Declare the function NAME in ANSI.
+m4_define([b4_c_ansi_function_def],
+[$2
+$1 (b4_c_ansi_formals(m4_shiftn(2, $@)))[]dnl
+])

 
 

-m4_define([b4_c_arg],
+
+# b4_c_ansi_formals([DECL1, NAME1], ...)
+# --------------------------------------
+# Output the arguments ANSI-C definition.
+m4_define([b4_c_ansi_formals],
+[m4_case([$@],
+         [],   [void],
+         [[]], [void],
+               [m4_map_sep([b4_c_ansi_formal], [, ], [$@])])])
+
+m4_define([b4_c_ansi_formal],
+[$1])
+
+
+# b4_c_knr_formal_names([DECL1, NAME1], ...)
+# ------------------------------------------
+# Output the argument names.
+m4_define([b4_c_knr_formal_names],
+[m4_map_sep([b4_c_knr_formal_name], [, ], [$@])])
+
+m4_define([b4_c_knr_formal_name],

 [$2])
 
 
 [$2])
 
 

-## ---------------------------------------------- ##
-## Declaring C functions in both K&R and ANSI-C.  ##
-## ---------------------------------------------- ##
+# 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;])
+

 
 
 
 

-# b4_c_function(NAME, RETURN-VALUE, [TYPE1, NAME1], ...)
-# ------------------------------------------------------
+## ------------------------------------------------------------ ##
+## Declaring (prototyping) C functions in both K&R and ANSI-C.  ##
+## ------------------------------------------------------------ ##
+
+
+# b4_c_function_decl(NAME, RETURN-VALUE, [DECL1, NAME1], ...)
+# -----------------------------------------------------------

 # Declare the function NAME.
 # Declare the function NAME.

-m4_define([b4_c_function],
-[$2
-#if defined (__STDC__) || defined (__cplusplus)
-$1 (b4_c_ansi_args(m4_shiftn(2, $@)))
+m4_define([b4_c_function_decl],
+[#if defined (__STDC__) || defined (__cplusplus)
+b4_c_ansi_function_decl($@)

 #else
 #else

-$1 (b4_c_knr_arg_names(m4_shiftn(2, $@)))
-b4_c_knr_arg_decls(m4_shiftn(2, $@))
+$2 $1 ();

 #endif[]dnl
 ])
 
 
 #endif[]dnl
 ])
 
 

-# b4_c_ansi_args([TYPE1, NAME1], ...)
-# -----------------------------------
-# Output the arguments ANSI-C definition.
-m4_define([b4_c_ansi_args],
-[m4_map_sep([b4_c_ansi_arg], [, ], [$@])])
+# b4_c_ansi_function_decl(NAME, RETURN-VALUE, [DECL1, NAME1], ...)
+# ----------------------------------------------------------------
+# Declare the function NAME.
+m4_define([b4_c_ansi_function_decl],
+[$2 $1 (b4_c_ansi_formals(m4_shiftn(2, $@)));[]dnl
+])

 
 

-m4_define([b4_c_ansi_arg],
-[$1 $2])

 
 
 
 

-# b4_c_knr_args([TYPE1, NAME1], ...)
-# ----------------------------------
-# Output the argument names.
-m4_define([b4_c_knr_arg_names],
-[m4_map_sep([b4_c_knr_arg_name], [, ], [$@])])

 
 

-m4_define([b4_c_knr_arg_name],
-[$2])
+## --------------------- ##
+## Calling C functions.  ##
+## --------------------- ##

 
 
 
 

-# b4_c_knr_args([TYPE1, NAME1], ...)
-# ----------------------------------
-# Output the K&R argument declarations.
-m4_define([b4_c_knr_arg_decls],
-[m4_map_sep([b4_c_knr_arg_decl],
-            [
-],
-            [$@])])
+# b4_c_function_call(NAME, RETURN-VALUE, [DECL1, NAME1], ...)
+# -----------------------------------------------------------
+# Call the function NAME with arguments NAME1, NAME2 etc.
+m4_define([b4_c_function_call],
+[$1 (b4_c_args(m4_shiftn(2, $@)))[]dnl
+])

 
 

-m4_define([b4_c_knr_arg_decl],
-[    $1 $2;])

 
 

+# b4_c_args([DECL1, NAME1], ...)
+# ------------------------------
+# Output the arguments NAME1, NAME2...
+m4_define([b4_c_args],
+[m4_map_sep([b4_c_arg], [, ], [$@])])

 
 

+m4_define([b4_c_arg],
+[$2])

 
 

-## ------------------ ##
-## Decoding options.  ##
-## ------------------ ##

 
 

+## ----------- ##
+## Synclines.  ##
+## ----------- ##

 
 

-# b4_location_if(IF-TRUE, IF-FALSE)
-# ---------------------------------
-# Expand IF-TRUE, if locations are used, IF-FALSE otherwise.
-m4_define([b4_location_if],
-[m4_if(b4_locations_flag, [1],
-       [$1],
-       [$2])])

 
 

+# b4_syncline(LINE, FILE)
+# -----------------------
+m4_define([b4_syncline],
+[m4_if(b4_synclines_flag, 1,
+       [[#]line $1 $2])])
+
+
+# b4_symbol_actions(FILENAME, LINENO,
+#                   SYMBOL-TAG, SYMBOL-NUM,
+#                   SYMBOL-ACTION, SYMBOL-TYPENAME)
+# -------------------------------------------------
+m4_define([b4_symbol_actions],
+[m4_pushdef([b4_dollar_dollar], [yyvaluep->$6])dnl
+m4_pushdef([b4_at_dollar], [(*yylocationp)])dnl
+      case $4: /* $3 */
+b4_syncline([$2], [$1])
+        $5;
+b4_syncline([@oline@], [@ofile@])
+        break;
+m4_popdef([b4_at_dollar])dnl
+m4_popdef([b4_dollar_dollar])dnl
+])

 
 

-# b4_pure_if(IF-TRUE, IF-FALSE)
-# -----------------------------
-# Expand IF-TRUE, if %pure-parser, IF-FALSE otherwise.
-m4_define([b4_pure_if],
-[m4_if(b4_pure, [1],
-       [$1],
-       [$2])])
+
+# b4_yydestruct_generate(FUNTION-DECLARATOR)
+# ------------------------------------------
+# Generate the "yydestruct" function, which declaration is issued using
+# FUNTION-DECLARATOR, which may be "b4_c_ansi_function_def" for ISO C
+# or "b4_c_function_def" for K&R.
+m4_define([b4_yydestruct_generate],
+[[/*-----------------------------------------------.
+| Release the memory associated to this symbol.  |
+`-----------------------------------------------*/
+
+]$1([yydestruct],
+    [static void],
+    [[int yytype],           [yytype]],
+    [[YYSTYPE *yyvaluep],    [yyvaluep]]b4_location_if([,
+    [[YYLTYPE *yylocationp], [yylocationp]]]))[
+{
+  /* Pacify ``unused variable'' warnings.  */
+  (void) yyvaluep;
+]b4_location_if([  (void) yylocationp;
+])[
+  switch (yytype)
+    {
+]m4_map([b4_symbol_actions], m4_defn([b4_symbol_destructors]))[
+      default:
+        break;
+    }
+}]dnl
+])
+
+
+# b4_yysymprint_generate(FUNTION-DECLARATOR)
+# ------------------------------------------
+# Generate the "yysymprint" function, which declaration is issued using
+# FUNTION-DECLARATOR, which may be "b4_c_ansi_function_def" for ISO C
+# or "b4_c_function_def" for K&R.
+m4_define([b4_yysymprint_generate],
+[[/*-----------------------------.
+| Print this symbol on YYOUT.  |
+`-----------------------------*/
+
+]$1([yysymprint],
+    [static void],
+    [[FILE *yyout],          [yyout]],
+    [[int yytype],           [yytype]],
+    [[YYSTYPE *yyvaluep],    [yyvaluep]]b4_location_if([,
+    [[YYLTYPE *yylocationp], [yylocationp]]]))
+{
+  /* Pacify ``unused variable'' warnings.  */
+  (void) yyvaluep;
+b4_location_if([  (void) yylocationp;
+])dnl
+
+  if (yytype < YYNTOKENS)
+    {
+      YYFPRINTF (yyout, "token %s (", yytname[[yytype]]);
+# ifdef YYPRINT
+      YYPRINT (yyout, yytoknum[[yytype]], *yyvaluep);
+# endif
+    }
+  else
+    YYFPRINTF (yyout, "nterm %s (", yytname[[yytype]]);
+
+  switch (yytype)
+    {
+m4_map([b4_symbol_actions], m4_defn([b4_symbol_printers]))dnl
+      default:
+        break;
+    }
+  YYFPRINTF (yyout, ")");
+}
+])