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[bison.git] / data / c.m4

diff --git a/data/c.m4 b/data/c.m4
index 1fe4bc56c74d22f86a93dac51412a78034767cba..5df04cbb8f6c4a77e1ad1f961d7010736cfe6596 100644 (file)
--- a/data/c.m4
+++ b/data/c.m4
@@ -1,8 +1,8 @@
                                                             -*- Autoconf -*-
 
 # C M4 Macros for Bison.
                                                             -*- Autoconf -*-
 
 # C M4 Macros for Bison.

-# Copyright (C) 2002, 2004, 2005, 2006, 2007, 2008 Free Software
-# Foundation, Inc.
+# Copyright (C) 2002, 2004, 2005, 2006, 2007, 2008, 2009
+# 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


@@ -21,11 +21,34 @@
 ## Identification.  ##
 ## ---------------- ##
 
 ## Identification.  ##
 ## ---------------- ##
 

-# b4_comment(TEXT)
-# ----------------
-m4_define([b4_comment], [/* m4_bpatsubst([$1], [
-], [
-   ])  */])
+# b4_comment_(TEXT, OPEN, CONTINUE, END)
+# -------------------------------------
+# Put TEXT in comment.  Avoid trailing spaces: don't indent empty lines.
+# Avoid adding indentation to the first line, as the indentation comes
+# from OPEN.  That's why we don't patsubst([$1], [^\(.\)], [   \1]).
+#
+# Prefix all the output lines with PREFIX.
+m4_define([b4_comment_], [$2[]m4_bpatsubst([$1], [
+\(.\)], [
+$3\1])$4])
+
+
+# b4_c_comment(TEXT, [PREFIX])
+# ----------------------------
+# Put TEXT in comment.  Avoid trailing spaces: don't indent empty lines.
+# Avoid adding indentation to the first line, as the indentation comes
+# from "/*".  That's why we don't patsubst([$1], [^\(.\)], [   \1]).
+#
+# Prefix all the output lines with PREFIX.
+m4_define([b4_c_comment],
+[b4_comment_([$1], [$2/* ], [$2   ], [$2  */])])
+
+
+# b4_comment(TEXT, [PREFIX])
+# --------------------------
+# By default, C comments.
+m4_define([b4_comment], [b4_c_comment($@)])
+

 
 # b4_identification
 # -----------------
 
 # b4_identification
 # -----------------


@@ -52,7 +75,7 @@ m4_define([b4_identification],
 #define YYPULL ]b4_pull_flag])[
 
 /* Using locations.  */
 #define YYPULL ]b4_pull_flag])[
 
 /* Using locations.  */

-#define YYLSP_NEEDED ]b4_locations_flag[
+#define YYLSP_NEEDED ]b4_locations_if([1], [0])[

 ]])
 
 
 ]])
 
 


@@ -146,6 +169,17 @@ m4_define([b4_int_type_for],
 m4_define([b4_null], [0])
 
 
 m4_define([b4_null], [0])
 
 

+# b4_integral_parser_table_define(TABLE-NAME, CONTENT, COMMENT)
+# -------------------------------------------------------------
+# Define "yy<TABLE-NAME>" which contents is CONTENT.
+m4_define([b4_integral_parser_table_define],
+[m4_ifval([$3], [b4_c_comment([$3], [  ])
+])dnl
+static const b4_int_type_for([$2]) yy$1[[]] =
+{
+  $2
+};dnl
+])

 
 
 ## ------------------------- ##
 
 
 ## ------------------------- ##


@@ -156,7 +190,7 @@ m4_define([b4_null], [0])
 # -----------------------------------------
 # 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
+[#define b4_percent_define_get([token.prefix])$1 $2

 ])
 
 
 ])
 
 


@@ -174,7 +208,7 @@ m4_map([b4_token_define], [$@])])
 # ---------------------------------------
 # 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_percent_define_get([token.prefix])$1 = $2])

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


@@ -205,6 +239,21 @@ m4_define([b4_token_enums_defines],
 ])
 
 
 ])
 
 

+## ----------------- ##
+## Semantic Values.  ##
+## ----------------- ##
+
+
+# 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]))])
+
+

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


@@ -293,7 +342,7 @@ m4_define([b4_c_knr_formal_decl],
 # -----------------------------------------------------------
 # Declare the function NAME.
 m4_define([b4_c_function_decl],
 # -----------------------------------------------------------
 # Declare the function NAME.
 m4_define([b4_c_function_decl],

-[#if defined __STDC__ || defined __cplusplus
+[#if b4_c_modern

 b4_c_ansi_function_decl($@)
 #else
 $2 $1 ();
 b4_c_ansi_function_decl($@)
 #else
 $2 $1 ();


@@ -352,24 +401,8 @@ m4_define([b4_sync_start], [[#]line $1 $2])
 m4_define([b4_case],
 [  case $1:
 $2
 m4_define([b4_case],
 [  case $1:
 $2

-    break;])
-
-# b4_symbol_actions(FILENAME, LINENO,
-#                   SYMBOL-TAG, SYMBOL-NUM,
-#                   SYMBOL-ACTION, SYMBOL-TYPENAME)
-# -------------------------------------------------
-m4_define([b4_symbol_actions],
-[m4_pushdef([b4_dollar_dollar],
-   [m4_ifval([$6], [(yyvaluep->$6)], [(*yyvaluep)])])dnl
-m4_pushdef([b4_at_dollar], [(*yylocationp)])dnl
-      case $4: /* $3 */
-b4_syncline([$2], [$1])
-       $5;

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

-       break;
-m4_popdef([b4_at_dollar])dnl
-m4_popdef([b4_dollar_dollar])dnl
-])
+    break;])

 
 
 # b4_yydestruct_generate(FUNCTION-DECLARATOR)
 
 
 # b4_yydestruct_generate(FUNCTION-DECLARATOR)


@@ -402,8 +435,8 @@ b4_parse_param_use[]dnl
 
   switch (yytype)
     {
 
   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


@@ -443,7 +476,7 @@ b4_parse_param_use[]dnl
 # endif
   switch (yytype)
     {
 # endif
   switch (yytype)
     {

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

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