X-Git-Url: https://git.saurik.com/bison.git/blobdiff_plain/3ebecc240d845191154734074e64dc9d15cb1daa..dfe292c695e1b6dcc7bc7257b59b98be960faff8:/tests/actions.at

diff --git a/tests/actions.at b/tests/actions.at
index 66dc6277..84529bef 100644
--- a/tests/actions.at
+++ b/tests/actions.at
@@ -1,20 +1,19 @@
 # Executing Actions.                               -*- Autotest -*-
-# Copyright (C) 2001, 2002, 2003, 2004, 2005, 2006 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
-# the Free Software Foundation; either version 2, or (at your option)
-# any later version.
+# Copyright (C) 2001-2012 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
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
 # This program is distributed in the hope that it will be useful,
 # but WITHOUT ANY WARRANTY; without even the implied warranty of
 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 # GNU General Public License for more details.
-
+#
 # You should have received a copy of the GNU General Public License
-# along with this program; if not, write to the Free Software
-# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
-# 02110-1301, USA.
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 AT_BANNER([[User Actions.]])
 
@@ -29,14 +28,13 @@ AT_SETUP([Mid-rule actions])
 # instead of being attached to the empty rule dedicated to this
 # action.
 
+AT_BISON_OPTION_PUSHDEFS
 AT_DATA_GRAMMAR([[input.y]],
-[[%error-verbose
+[[%define parse.error verbose
 %debug
 %{
-# include <stdio.h>
-# include <stdlib.h>
-  static void yyerror (const char *msg);
-  static int yylex (void);
+]AT_YYERROR_DECLARE[
+]AT_YYLEX_DECLARE[
 %}
 %%
 exp:     { putchar ('0'); }
@@ -52,30 +50,17 @@ exp:     { putchar ('0'); }
          { putchar ('\n'); }
    ;
 %%
-static int
-yylex (void)
-{
-  static char const input[] = "123456789";
-  static size_t toknum;
-  if (! (toknum < sizeof input))
-    abort ();
-  return input[toknum++];
-}
-
-static void
-yyerror (const char *msg)
-{
-  fprintf (stderr, "%s\n", msg);
-}
-
+]AT_YYERROR_DEFINE[
+]AT_YYLEX_DEFINE(123456789)[
 int
 main (void)
 {
   return yyparse ();
 }
 ]])
+AT_BISON_OPTION_POPDEFS
 
-AT_CHECK([bison -d -v -o input.c input.y])
+AT_BISON_CHECK([-d -v -o input.c input.y])
 AT_COMPILE([input])
 AT_PARSER_CHECK([./input], 0,
 [[0123456789
@@ -93,14 +78,13 @@ AT_CLEANUP
 
 AT_SETUP([Exotic Dollars])
 
+AT_BISON_OPTION_PUSHDEFS
 AT_DATA_GRAMMAR([[input.y]],
-[[%error-verbose
+[[%define parse.error verbose
 %debug
 %{
-# include <stdio.h>
-# include <stdlib.h>
-  static void yyerror (const char *msg);
-  static int yylex (void);
+]AT_YYERROR_DECLARE[
+]AT_YYLEX_DECLARE[
 # define USE(Var)
 %}
 
@@ -131,21 +115,49 @@ sum_of_the_five_previous_values:
 ;
 
 %%
-static int
-yylex (void)
+]AT_YYERROR_DEFINE[
+]AT_YYLEX_DEFINE([])[
+int
+main (void)
 {
-  static int called;
-  if (called++)
-    abort ();
-  return EOF;
+  return yyparse ();
 }
+]])
 
-static void
-yyerror (const char *msg)
+AT_BISON_CHECK([-d -v -o input.c input.y], 0)
+AT_COMPILE([input])
+AT_PARSER_CHECK([./input], 0,
+[[15
+]])
+
+# Make sure that fields after $n or $-n are parsed correctly.  At one
+# point while implementing dashes in symbol names, we were dropping
+# fields after $-n.
+AT_DATA_GRAMMAR([[input.y]],
+[[
+%{
+# include <stdio.h>
+]AT_YYERROR_DECLARE[
+]AT_YYLEX_DECLARE[
+  typedef struct { int val; } stype;
+# define YYSTYPE stype
+%}
+
+%%
+start: one two { $$.val = $1.val + $2.val; } sum ;
+one: { $$.val = 1; } ;
+two: { $$.val = 2; } ;
+sum: { printf ("%d\n", $0.val + $-1.val + $-2.val); } ;
+
+%%
+
+static int
+yylex (void)
 {
-  fprintf (stderr, "%s\n", msg);
+  return 0;
 }
 
+]AT_YYERROR_DEFINE[
 int
 main (void)
 {
@@ -153,12 +165,13 @@ main (void)
 }
 ]])
 
-AT_CHECK([bison -d -v -o input.c input.y], 0)
-AT_COMPILE([input])
-AT_PARSER_CHECK([./input], 0,
-[[15
+AT_BISON_CHECK([[-o input.c input.y]])
+AT_COMPILE([[input]])
+AT_PARSER_CHECK([[./input]], [[0]],
+[[6
 ]])
 
+AT_BISON_OPTION_POPDEFS
 AT_CLEANUP
 
 
@@ -178,7 +191,7 @@ m4_if([$1$2$3], $[1]$[2]$[3], [],
 # helping macros.  So don't put any directly in the Bison file.
 AT_BISON_OPTION_PUSHDEFS([$5])
 AT_DATA_GRAMMAR([[input.y]],
-[[%requires {
+[[%code requires {
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
@@ -196,11 +209,11 @@ m4_ifval([$6], [%union
 {
   int ival;
 }])
-AT_LALR1_CC_IF([%define "global_tokens_and_yystype"])
-m4_ifval([$6], [[%provides {]], [[%code {]])
+AT_LALR1_CC_IF([%define global_tokens_and_yystype])
+m4_ifval([$6], [[%code provides {]], [[%code {]])
 AT_LALR1_CC_IF([typedef yy::location YYLTYPE;])
 [static int yylex (]AT_LEX_FORMALS[);
-]AT_LALR1_CC_IF([], [static void yyerror (const char *msg);])
+]AT_LALR1_CC_IF([], [AT_YYERROR_DECLARE])
 [}
 
 ]m4_ifval([$6], [%type <ival> '(' 'x' 'y' ')' ';' thing line input END])[
@@ -253,11 +266,11 @@ input:
       printf ("input (%d@%d-%d): /* Nothing */\n", $$, RANGE (@$));
     }
 | line input /* Right recursive to load the stack so that popping at
-		END can	be exercised.  */
+                END can be exercised.  */
     {
       $$ = 2;
       printf ("input (%d@%d-%d): line (%d@%d-%d) input (%d@%d-%d)\n",
-	      $$, RANGE (@$), $1, RANGE (@1), $2, RANGE (@2));
+              $$, RANGE (@$), $1, RANGE (@1), $2, RANGE (@2));
     }
 ;
 
@@ -300,7 +313,7 @@ thing:
 ;
 %%
 /* Alias to ARGV[1]. */
-const char *source = 0;
+const char *source = YY_NULL;
 
 static int
 yylex (]AT_LEX_FORMALS[)
@@ -368,11 +381,7 @@ main (int argc, const char *argv[])
 }
 ]])
 
-AT_LALR1_CC_IF(
-  [AT_CHECK([bison -o input.cc input.y])
-   AT_COMPILE_CXX([input])],
-  [AT_CHECK([bison -o input.c input.y])
-   AT_COMPILE([input])])
+AT_FULL_COMPILE([input])
 
 
 # Check the location of "empty"
@@ -552,7 +561,8 @@ Parsing FAILED (status 2).
 ]])
 ])
 
-])
+AT_BISON_OPTION_POPDEFS
+])# _AT_CHECK_PRINTER_AND_DESTRUCTOR
 
 
 # AT_CHECK_PRINTER_AND_DESTRUCTOR([BISON-OPTIONS], [UNION-FLAG], [SKIP_FLAG])
@@ -562,7 +572,7 @@ m4_define([AT_CHECK_PRINTER_AND_DESTRUCTOR],
 
 $3
 _AT_CHECK_PRINTER_AND_DESTRUCTOR($[1], $[2], $[3], $[4],
-[%error-verbose
+[%define parse.error verbose
 %debug
 %verbose
 %locations
@@ -591,9 +601,9 @@ AT_CHECK_PRINTER_AND_DESTRUCTOR([%glr-parser], [with union])
 # called for $end, and that $$ and @$ work correctly.
 
 AT_SETUP([Default tagless %printer and %destructor])
-
+AT_BISON_OPTION_PUSHDEFS([%locations])
 AT_DATA_GRAMMAR([[input.y]],
-[[%error-verbose
+[[%define parse.error verbose
 %debug
 %locations
 %initial-action {
@@ -604,8 +614,8 @@ AT_DATA_GRAMMAR([[input.y]],
 %{
 # include <stdio.h>
 # include <stdlib.h>
-  static void yyerror (const char *msg);
-  static int yylex (void);
+]AT_YYLEX_DECLARE[
+]AT_YYERROR_DECLARE[
 # define USE(SYM)
 %}
 
@@ -636,25 +646,8 @@ AT_DATA_GRAMMAR([[input.y]],
 start: 'a' 'b' 'c' 'd' 'e' { $$ = 'S'; USE(($1, $2, $3, $4, $5)); } ;
 
 %%
-
-static int
-yylex (void)
-{
-  static char const input[] = "abcd";
-  static size_t toknum;
-  if (! (toknum < sizeof input))
-    abort ();
-  yylval = input[toknum++];
-  yylloc.first_line = yylloc.last_line = 1;
-  yylloc.first_column = yylloc.last_column = toknum;
-  return yylval;
-}
-
-static void
-yyerror (const char *msg)
-{
-  fprintf (stderr, "%s\n", msg);
-}
+]AT_YYERROR_DEFINE[
+]AT_YYLEX_DEFINE([abcd], [[yylval = res]])[
 
 int
 main (void)
@@ -664,7 +657,7 @@ main (void)
 }
 ]])
 
-AT_CHECK([bison -o input.c input.y])
+AT_BISON_CHECK([-o input.c input.y])
 AT_COMPILE([input])
 AT_PARSER_CHECK([./input], 1,
 [[<> destructor for 'd' @ 4.
@@ -700,6 +693,7 @@ Cleanup: discarding lookahead token $end (1.5-1.5: )
 Stack now 0
 ]])
 
+AT_BISON_OPTION_POPDEFS
 AT_CLEANUP
 
 
@@ -709,16 +703,16 @@ AT_CLEANUP
 ## ------------------------------------------------------ ##
 
 AT_SETUP([Default tagged and per-type %printer and %destructor])
-
+AT_BISON_OPTION_PUSHDEFS
 AT_DATA_GRAMMAR([[input.y]],
-[[%error-verbose
+[[%define parse.error verbose
 %debug
 
 %{
 # include <stdio.h>
 # include <stdlib.h>
-  static void yyerror (const char *msg);
-  static int yylex (void);
+]AT_YYERROR_DECLARE[
+]AT_YYLEX_DECLARE[
 # define USE(SYM)
 %}
 
@@ -764,22 +758,8 @@ start:
   ;
 
 %%
-
-static int
-yylex (void)
-{
-  static char const input[] = "abcdef";
-  static size_t toknum;
-  if (! (toknum < sizeof input))
-    abort ();
-  return input[toknum++];
-}
-
-static void
-yyerror (const char *msg)
-{
-  fprintf (stderr, "%s\n", msg);
-}
+]AT_YYERROR_DEFINE[
+]AT_YYLEX_DEFINE([abcdef])[
 
 int
 main (void)
@@ -789,7 +769,7 @@ main (void)
 }
 ]])
 
-AT_CHECK([bison -o input.c input.y])
+AT_BISON_CHECK([-o input.c input.y])
 AT_COMPILE([input])
 AT_PARSER_CHECK([./input], 1,
 [[<*>/<field2>/e destructor.
@@ -837,6 +817,7 @@ Cleanup: discarding lookahead token $end ()
 Stack now 0
 ]])
 
+AT_BISON_OPTION_POPDEFS
 AT_CLEANUP
 
 
@@ -848,14 +829,15 @@ AT_CLEANUP
 AT_SETUP([Default %printer and %destructor for user-defined end token])
 
 # _AT_CHECK_DEFAULT_PRINTER_AND_DESTRUCTOR_FOR_END_TOKEN(TYPED)
-# -----------------------------------------------------------------------------
+# -------------------------------------------------------------
 m4_define([_AT_CHECK_DEFAULT_PRINTER_AND_DESTRUCTOR_FOR_END_TOKEN],
 [m4_if($1, 0,
   [m4_pushdef([kind], []) m4_pushdef([not_kind], [*])],
   [m4_pushdef([kind], [*]) m4_pushdef([not_kind], [])])
 
+AT_BISON_OPTION_PUSHDEFS([%locations])
 AT_DATA_GRAMMAR([[input]]$1[[.y]],
-[[%error-verbose
+[[%define parse.error verbose
 %debug
 %locations
 %initial-action {
@@ -866,8 +848,8 @@ AT_DATA_GRAMMAR([[input]]$1[[.y]],
 %{
 # include <stdio.h>
 # include <stdlib.h>
-  static void yyerror (const char *msg);
-  static int yylex (void);
+]AT_YYERROR_DECLARE[
+]AT_YYLEX_DECLARE[
 # define USE(SYM)
 %}
 
@@ -909,12 +891,7 @@ yylex (void)
   yylloc.first_column = yylloc.last_column = 1;
   return 0;
 }
-
-static void
-yyerror (const char *msg)
-{
-  fprintf (stderr, "%s\n", msg);
-}
+]AT_YYERROR_DEFINE[
 
 int
 main (void)
@@ -923,8 +900,9 @@ main (void)
   return yyparse ();
 }
 ]])
+AT_BISON_OPTION_POPDEFS
 
-AT_CHECK([bison -o input$1.c input$1.y])
+AT_BISON_CHECK([-o input$1.c input$1.y])
 AT_COMPILE([input$1])
 AT_PARSER_CHECK([./input$1], 0,
 [[<]]kind[[> for 'E' @ 1.
@@ -959,7 +937,7 @@ AT_CLEANUP
 ## Default %printer and %destructor are not for error or $undefined.  ##
 ## ------------------------------------------------------------------ ##
 
-AT_SETUP([Default %printer and %destructor are not for error or \$undefined])
+AT_SETUP([Default %printer and %destructor are not for error or $undefined])
 
 # If Bison were to apply the default %printer and %destructor to the error
 # token or to $undefined:
@@ -969,15 +947,15 @@ AT_SETUP([Default %printer and %destructor are not for error or \$undefined])
 #       semantic value, which would be initialized from the lookahead, which
 #       would be destroyed separately.
 #   - For $undefined, who knows what the semantic value would be.
-
+AT_BISON_OPTION_PUSHDEFS
 AT_DATA_GRAMMAR([[input.y]],
 [[%debug
 
 %{
 # include <stdio.h>
 # include <stdlib.h>
-  static void yyerror (const char *msg);
-  static int yylex (void);
+]AT_YYERROR_DECLARE[
+]AT_YYLEX_DECLARE[
 # define USE(SYM)
 %}
 
@@ -998,24 +976,8 @@ start:
   ;
 
 %%
-
-static int
-yylex (void)
-{
-  static char const input[] = "abd";
-  static size_t toknum;
-  if (! (toknum < sizeof input))
-    abort ();
-  yylval = input[toknum++];
-  return yylval;
-}
-
-static void
-yyerror (const char *msg)
-{
-  fprintf (stderr, "%s\n", msg);
-}
-
+]AT_YYERROR_DEFINE[
+]AT_YYLEX_DEFINE([abd], [yylval = res])[
 int
 main (void)
 {
@@ -1023,8 +985,9 @@ main (void)
   return yyparse ();
 }
 ]])
+AT_BISON_OPTION_POPDEFS
 
-AT_CHECK([bison -o input.c input.y])
+AT_BISON_CHECK([-o input.c input.y])
 AT_COMPILE([input])
 AT_PARSER_CHECK([./input], [1], [],
 [[Starting parse
@@ -1069,7 +1032,7 @@ AT_CLEANUP
 ## Default %printer and %destructor are not for $accept.  ##
 ## ------------------------------------------------------ ##
 
-AT_SETUP([Default %printer and %destructor are not for \$accept])
+AT_SETUP([Default %printer and %destructor are not for $accept])
 
 # If YYSTYPE is a union and Bison were to apply the default %printer and
 # %destructor to $accept:
@@ -1084,14 +1047,15 @@ AT_SETUP([Default %printer and %destructor are not for \$accept])
 #     true for $undefined and the error token, so there are three warnings for
 #     %printer and three for %destructor.)
 
+AT_BISON_OPTION_PUSHDEFS
 AT_DATA_GRAMMAR([[input.y]],
 [[%debug /* So that %printer is actually compiled.  */
 
 %{
 # include <stdio.h>
 # include <stdlib.h>
-  static void yyerror (const char *msg);
-  static int yylex (void);
+]AT_YYERROR_DECLARE[
+]AT_YYLEX_DECLARE[
 # define USE(SYM)
 %}
 
@@ -1112,30 +1076,17 @@ AT_DATA_GRAMMAR([[input.y]],
 start: { USE($$); } ;
 
 %%
-
-static int
-yylex (void)
-{
-  static int called;
-  if (called++)
-    abort ();
-  return 0;
-}
-
-static void
-yyerror (const char *msg)
-{
-  fprintf (stderr, "%s\n", msg);
-}
-
+]AT_YYERROR_DEFINE[
+]AT_YYLEX_DEFINE([])[
 int
 main (void)
 {
   return yyparse ();
 }
 ]])
+AT_BISON_OPTION_POPDEFS
 
-AT_CHECK([bison -o input.c input.y])
+AT_BISON_CHECK([-o input.c input.y])
 AT_COMPILE([input])
 
 AT_CLEANUP
@@ -1148,17 +1099,18 @@ AT_CLEANUP
 
 AT_SETUP([Default %printer and %destructor for mid-rule values])
 
+AT_BISON_OPTION_PUSHDEFS
 AT_DATA_GRAMMAR([[input.y]],
 [[%debug /* So that %printer is actually compiled.  */
 
 %{
 # include <stdio.h>
 # include <stdlib.h>
-  static void yyerror (const char *msg);
-  static int yylex (void);
+]AT_YYERROR_DECLARE[
+]AT_YYLEX_DECLARE[
 # define USE(SYM)
 # define YYLTYPE int
-# define YYLLOC_DEFAULT(Current, Rhs, N)
+# define YYLLOC_DEFAULT(Current, Rhs, N) (void)(Rhs)
 # define YY_LOCATION_PRINT(File, Loc)
 %}
 
@@ -1179,22 +1131,8 @@ start:
   ;
 
 %%
-
-static int
-yylex (void)
-{
-  static int called;
-  if (called++)
-    abort ();
-  return 0;
-}
-
-static void
-yyerror (const char *msg)
-{
-  fprintf (stderr, "%s\n", msg);
-}
-
+]AT_YYERROR_DEFINE[
+]AT_YYLEX_DEFINE([])[
 int
 main (void)
 {
@@ -1202,8 +1140,9 @@ main (void)
   return yyparse ();
 }
 ]])
+AT_BISON_OPTION_POPDEFS
 
-AT_CHECK([bison -o input.c input.y], 0,,
+AT_BISON_CHECK([-o input.c input.y], 0,,
 [[input.y:33.3-23: warning: unset value: $$
 input.y:30.3-35.37: warning: unused value: $3
 ]])
@@ -1246,3 +1185,288 @@ Stack now 0
 ]])
 
 AT_CLEANUP
+
+
+## ----------------------- ##
+## @$ implies %locations.  ##
+## ----------------------- ##
+
+# Bison once forgot to check for @$ in actions other than semantic actions.
+
+# AT_CHECK_ACTION_LOCATIONS(ACTION-DIRECTIVE)
+# -------------------------------------------
+m4_define([AT_CHECK_ACTION_LOCATIONS],
+[AT_SETUP([[@$ in ]$1[ implies %locations]])
+AT_BISON_OPTION_PUSHDEFS
+AT_DATA_GRAMMAR([[input.y]],
+[[%code {
+  #include <stdio.h>
+]AT_YYERROR_DECLARE[
+]AT_YYLEX_DECLARE[
+}
+
+%debug
+
+]$1[ {
+  printf ("%d\n", @$.first_line);
+} ]m4_if($1, [%initial-action], [], [[start]])[
+
+%%
+
+start:  ;
+
+%%
+
+static int
+yylex (void)
+{
+  return 0;
+}
+
+]AT_YYERROR_DEFINE[
+int
+main (void)
+{
+  return yyparse ();
+}
+]])
+
+AT_BISON_CHECK([[-o input.c input.y]])
+AT_COMPILE([[input]])
+AT_BISON_OPTION_POPDEFS
+AT_CLEANUP])
+
+AT_CHECK_ACTION_LOCATIONS([[%initial-action]])
+AT_CHECK_ACTION_LOCATIONS([[%destructor]])
+AT_CHECK_ACTION_LOCATIONS([[%printer]])
+
+
+## ----------------------------------------------- ##
+## Fix user actions without a trailing semicolon.  ##
+## ----------------------------------------------- ##
+
+AT_SETUP([[Fix user actions without a trailing semicolon]])
+
+# This feature is undocumented, but we accidentally broke it in 2.3a,
+# and there was a complaint at:
+# <http://lists.gnu.org/archive/html/bug-bison/2008-11/msg00001.html>.
+AT_BISON_OPTION_PUSHDEFS
+AT_DATA([input.y],
+[[%%
+start: test2 test1 test0 testc;
+
+test2
+: 'a' { semi;                   /* TEST:N:2 */ }
+| 'b' { if (0) {no_semi}        /* TEST:N:2 */ }
+| 'c' { if (0) {semi;}          /* TEST:N:2 */ }
+| 'd' { semi;   no_semi         /* TEST:Y:2 */ }
+| 'e' { semi(); no_semi()       /* TEST:Y:2 */ }
+| 'f' { semi[]; no_semi[]       /* TEST:Y:2 */ }
+| 'g' { semi++; no_semi++       /* TEST:Y:2 */ }
+| 'h' { {no_semi} no_semi       /* TEST:Y:2 */ }
+| 'i' { {semi;}   no_semi       /* TEST:Y:2 */ }
+;
+test1
+  : 'a' { semi;                 // TEST:N:1 ;
+} | 'b' { if (0) {no_semi}      // TEST:N:1 ;
+} | 'c' { if (0) {semi;}        // TEST:N:1 ;
+} | 'd' { semi;   no_semi       // TEST:Y:1 ;
+} | 'e' { semi(); no_semi()     // TEST:Y:1 ;
+} | 'f' { semi[]; no_semi[]     // TEST:Y:1 ;
+} | 'g' { semi++; no_semi++     // TEST:Y:1 ;
+} | 'h' { {no_semi} no_semi     // TEST:Y:1 ;
+} | 'i' { {semi;}   no_semi     // TEST:Y:1 ;
+} ;
+test0
+  : 'a' { semi;                 // TEST:N:1 {}
+} | 'b' { if (0) {no_semi}      // TEST:N:1 {}
+} | 'c' { if (0) {semi;}        // TEST:N:1 {}
+} | 'd' { semi;   no_semi       // TEST:Y:1 {}
+} | 'e' { semi(); no_semi()     // TEST:Y:1 {}
+} | 'f' { semi[]; no_semi[]     // TEST:Y:1 {}
+} | 'g' { semi++; no_semi++     // TEST:Y:1 {}
+} | 'h' { {no_semi} no_semi     // TEST:Y:1 {}
+} | 'i' { {semi;}   no_semi     // TEST:Y:1 {}
+} ;
+
+testc
+: 'a' {
+#define TEST_MACRO_N \
+[]"broken\" $ @ $$ @$ [];\
+string;"}
+| 'b' {
+no_semi
+#define TEST_MACRO_N \
+[]"broken\" $ @ $$ @$ [];\
+string;"}
+]])
+AT_BISON_OPTION_POPDEFS
+
+AT_BISON_CHECK([[-o input.c input.y]], [0], [],
+[[input.y:8.48: warning: a ';' might be needed at the end of action code
+input.y:8.48: warning: future versions of Bison will not add the ';'
+input.y:9.48: warning: a ';' might be needed at the end of action code
+input.y:9.48: warning: future versions of Bison will not add the ';'
+input.y:10.48: warning: a ';' might be needed at the end of action code
+input.y:10.48: warning: future versions of Bison will not add the ';'
+input.y:11.48: warning: a ';' might be needed at the end of action code
+input.y:11.48: warning: future versions of Bison will not add the ';'
+input.y:12.48: warning: a ';' might be needed at the end of action code
+input.y:12.48: warning: future versions of Bison will not add the ';'
+input.y:13.48: warning: a ';' might be needed at the end of action code
+input.y:13.48: warning: future versions of Bison will not add the ';'
+input.y:20.1: warning: a ';' might be needed at the end of action code
+input.y:20.1: warning: future versions of Bison will not add the ';'
+input.y:21.1: warning: a ';' might be needed at the end of action code
+input.y:21.1: warning: future versions of Bison will not add the ';'
+input.y:22.1: warning: a ';' might be needed at the end of action code
+input.y:22.1: warning: future versions of Bison will not add the ';'
+input.y:23.1: warning: a ';' might be needed at the end of action code
+input.y:23.1: warning: future versions of Bison will not add the ';'
+input.y:24.1: warning: a ';' might be needed at the end of action code
+input.y:24.1: warning: future versions of Bison will not add the ';'
+input.y:25.1: warning: a ';' might be needed at the end of action code
+input.y:25.1: warning: future versions of Bison will not add the ';'
+input.y:31.1: warning: a ';' might be needed at the end of action code
+input.y:31.1: warning: future versions of Bison will not add the ';'
+input.y:32.1: warning: a ';' might be needed at the end of action code
+input.y:32.1: warning: future versions of Bison will not add the ';'
+input.y:33.1: warning: a ';' might be needed at the end of action code
+input.y:33.1: warning: future versions of Bison will not add the ';'
+input.y:34.1: warning: a ';' might be needed at the end of action code
+input.y:34.1: warning: future versions of Bison will not add the ';'
+input.y:35.1: warning: a ';' might be needed at the end of action code
+input.y:35.1: warning: future versions of Bison will not add the ';'
+input.y:36.1: warning: a ';' might be needed at the end of action code
+input.y:36.1: warning: future versions of Bison will not add the ';'
+]])
+
+AT_MATCHES_CHECK([input.c], [[/\* TEST:N:2 \*/ \}$]],       [[3]])
+AT_MATCHES_CHECK([input.c], [[/\* TEST:Y:2 \*/ ;\}$]],      [[6]])
+AT_MATCHES_CHECK([input.c], [[// TEST:N:1 [;{}]*\n\}$]],    [[6]])
+AT_MATCHES_CHECK([input.c], [[// TEST:Y:1 [;{}]*\n;\}$]],  [[12]])
+AT_MATCHES_CHECK([input.c], [[#define TEST_MACRO_N \\\n\[\]"broken\\" \$ \@ \$\$ \@\$ \[\];\\\nstring;"\}]], [[2]])
+
+AT_CLEANUP
+
+
+## -------------------------------------------------- ##
+## Destroying lookahead assigned by semantic action.  ##
+## -------------------------------------------------- ##
+
+AT_SETUP([[Destroying lookahead assigned by semantic action]])
+
+AT_BISON_OPTION_PUSHDEFS
+AT_DATA_GRAMMAR([input.y],
+[[
+%code {
+  #include <assert.h>
+  #include <stdio.h>
+]AT_YYERROR_DECLARE[
+]AT_YYLEX_DECLARE[
+  #define USE(Var)
+}
+
+%destructor { fprintf (stderr, "'a' destructor\n"); } 'a'
+%destructor { fprintf (stderr, "'b' destructor\n"); } 'b'
+
+%%
+
+// In a previous version of Bison, yychar assigned by the semantic
+// action below was not translated into yytoken before the lookahead was
+// discarded and thus before its destructor (selected according to
+// yytoken) was called in order to return from yyparse.  This would
+// happen even if YYACCEPT was performed in a later semantic action as
+// long as only consistent states with default reductions were visited
+// in between.  However, we leave YYACCEPT in the same semantic action
+// for this test in order to show that skeletons cannot simply translate
+// immediately after every semantic action because a semantic action
+// that has set yychar might not always return normally.  Instead,
+// skeletons must translate before every use of yytoken.
+start: 'a' accept { USE($1); } ;
+accept: /*empty*/ {
+  assert (yychar == YYEMPTY);
+  yychar = 'b';
+  YYACCEPT;
+} ;
+
+%%
+]AT_YYERROR_DEFINE[
+]AT_YYLEX_DEFINE([a])[
+int
+main (void)
+{
+  return yyparse ();
+}
+]])
+AT_BISON_OPTION_POPDEFS
+AT_BISON_CHECK([[-o input.c input.y]])
+AT_COMPILE([[input]])
+AT_PARSER_CHECK([[./input]], [[0]], [],
+[['b' destructor
+'a' destructor
+]])
+
+AT_CLEANUP
+
+## ---------- ##
+## YYBACKUP.  ##
+## ---------- ##
+
+AT_SETUP([[YYBACKUP]])
+
+AT_BISON_OPTION_PUSHDEFS([%pure-parser])
+
+AT_DATA_GRAMMAR([input.y],
+[[
+%error-verbose
+%debug
+%pure-parser
+%code {
+# include <stdio.h>
+# include <stdlib.h>
+# include <assert.h>
+
+  ]AT_YYERROR_DECLARE[
+  static int yylex (YYSTYPE *yylval);
+}
+%%
+input:
+  exp exp {}
+;
+
+exp:
+  'a'     { printf ("a: %d\n", $1); }
+| 'b'     { YYBACKUP('a', 123); }
+| 'c' 'd' { YYBACKUP('a', 456); }
+;
+
+%%
+]AT_YYERROR_DEFINE[
+static int
+yylex (YYSTYPE *yylval)
+{
+  static char const input[] = "bcd";
+  static size_t toknum;
+  assert (toknum < sizeof input);
+  *yylval = (toknum + 1) * 10;
+  return input[toknum++];
+}
+
+int
+main (void)
+{
+  yydebug = !!getenv("YYDEBUG");
+  return yyparse ();
+}
+]])
+AT_BISON_OPTION_POPDEFS
+
+AT_BISON_CHECK([[-o input.c input.y]])
+AT_COMPILE([[input]])
+AT_PARSER_CHECK([[./input]], [[0]],
+[[a: 123
+a: 456
+]])
+
+AT_CLEANUP