variants: avoid type punning issue

[bison.git] / data / bison.m4

diff --git a/data/bison.m4 b/data/bison.m4
index 0697529f3b9a237abd96a4a8559ac9a73416751f..704f172eb0e7efc0ed3cb40b35868a5b321e491a 100644 (file)
--- a/data/bison.m4
+++ b/data/bison.m4
@@ -2,7 +2,7 @@
 
 # Language-independent 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
@@ -250,30 +250,30 @@ m4_define([b4_integral_parser_tables_map],
 STATE-NUM.]])
 
 $1([defact], [b4_defact],
-   [[YYDEFACT[S] -- default reduction number in state S.  Performed when
-YYTABLE does not specify something else to do.  Zero means the default
-is an error.]])
+   [[YYDEFACT[STATE-NUM] -- Default reduction number in state STATE-NUM.
+Performed when YYTABLE does not specify something else to do.  Zero
+means the default is an error.]])
 
 $1([pgoto], [b4_pgoto], [[YYPGOTO[NTERM-NUM].]])
 
 $1([defgoto], [b4_defgoto], [[YYDEFGOTO[NTERM-NUM].]])
 
 $1([table], [b4_table],
-   [[YYTABLE[YYPACT[STATE-NUM]].  What to do in state STATE-NUM.  If
+   [[YYTABLE[YYPACT[STATE-NUM]] -- What to do in state STATE-NUM.  If
 positive, shift that token.  If negative, reduce the rule whose
 number is the opposite.  If YYTABLE_NINF, syntax error.]])
 
 $1([check], [b4_check])
 
 $1([stos], [b4_stos],
-   [[STOS_[STATE-NUM] -- The (internal number of the) accessing
+   [[YYSTOS[STATE-NUM] -- The (internal number of the) accessing
 symbol of state STATE-NUM.]])
 
 $1([r1], [b4_r1],
    [[YYR1[YYN] -- Symbol number of symbol that rule YYN derives.]])
 
 $1([r2], [b4_r2],
-   [[YYR2[YYN] -- Number of symbols composing right hand side of rule YYN.]])
+   [[YYR2[YYN] -- Number of symbols on the right hand side of rule YYN.]])
 ])
 
 
@@ -425,9 +425,9 @@ m4_define([b4_symbol_action],
                    b4_symbol_if([$1], [has_type],
                                 [m4_dquote(b4_symbol([$1], [type]))]),
                    [(*yylocationp)])dnl
-      b4_symbol_case_([$1])[]dnl
+    b4_symbol_case_([$1])[]dnl
 b4_syncline([b4_symbol([$1], [$2_line])], ["b4_symbol([$1], [$2_file])"])
-        b4_symbol([$1], [$2])
+      b4_symbol([$1], [$2])
 b4_syncline([@oline@], [@ofile@])
         break;
 
@@ -446,7 +446,7 @@ m4_define([b4_symbol_printer],    [b4_symbol_action([$1], [printer])])
 # ---------------------------
 # Issue a "case NUM" for SYMBOL-NUM.
 m4_define([b4_symbol_case_],
-[      case b4_symbol([$1], [number]): // b4_symbol([$1], [tag])
+[case b4_symbol([$1], [number]): b4_symbol_tag_comment([$1])])
 ])
 
 
@@ -509,7 +509,7 @@ m4_define([b4_token_format],
 # TAG, TYPE).
 m4_define([b4_type_action_],
 [b4_symbol_if([$1], [has_type],
-[m4_map([b4_symbol_case_], [$@])[]dnl
+[m4_map([      b4_symbol_case_], [$@])[]dnl
         b4_dollar_dollar([b4_symbol([$1], [number])],
                          [b4_symbol([$1], [tag])],
                          [b4_symbol([$1], [type])]);
@@ -541,11 +541,21 @@ m4_define([b4_basename],
 # -----------------------
 m4_define([b4_syncline],
 [b4_flag_if([synclines],
-[b4_sync_end([__line__], [b4_basename(m4_quote(__file__))])
-b4_sync_start([$1], [$2])])])
+[b4_sync_start([$1], [$2]) b4_sync_end([__line__],
+                                       [b4_basename(m4_quote(__file__))])[]dnl
+])])
+
+# b4_sync_start(LINE, FILE)
+# -----------------------
+# Syncline for the new place.  Typically a directive for the compiler.
+m4_define([b4_sync_start], [b4_comment([$2:$1])])
+
+# b4_sync_end(LINE, FILE)
+# -----------------------
+# Syncline for the current place, which ends.  Typically a comment
+# left for the reader.
+m4_define([b4_sync_end],   [b4_comment([$2:$1])])
 
-m4_define([b4_sync_end], [b4_comment([Line $1 of $2])])
-m4_define([b4_sync_start], [b4_comment([Line $1 of $2])])
 
 # b4_user_code(USER-CODE)
 # -----------------------