* runtime-po/POTFILES.in (push.c): Remove.

[bison.git] / tests / regression.at

diff --git a/tests/regression.at b/tests/regression.at
index 666b99e54401e889568562fba409b30ea209e073..a3e7d4f79851fd8ae0a51001376b9b3a966cd671 100644 (file)
--- a/tests/regression.at
+++ b/tests/regression.at
@@ -1,22 +1,20 @@
 # Bison Regressions.                               -*- Autotest -*-
 
 # Bison Regressions.                               -*- Autotest -*-
 

-# Copyright (C) 2001, 2002, 2003, 2004, 2005, 2006 Free Software
+# Copyright (C) 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008 Free Software

 # Foundation, Inc.
 
 # Foundation, Inc.
 

-# This program is free software; you can redistribute it and/or modify
+# 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
 # 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.
-
+# 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.
 # 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
 # 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([[Regression tests.]])
 
 
 AT_BANNER([[Regression tests.]])
 


@@ -41,7 +39,7 @@ int yylex (void);
 program: 'x';
 ]])
 
 program: 'x';
 ]])
 

-AT_CHECK([bison -o input.c input.y])
+AT_BISON_CHECK([-o input.c input.y])

 AT_COMPILE([input.o], [-c input.c])
 AT_COMPILE([input.o], [-DYYDEBUG -c input.c])
 
 AT_COMPILE([input.o], [-c input.c])
 AT_COMPILE([input.o], [-DYYDEBUG -c input.c])
 


@@ -69,7 +67,7 @@ typedef union { char const *val; } YYSTYPE;
 program: { $$ = ""; };
 ]])
 
 program: { $$ = ""; };
 ]])
 

-AT_CHECK([bison -o input.c input.y])
+AT_BISON_CHECK([-o input.c input.y])

 AT_COMPILE([input.o], [-c input.c])
 
 AT_CLEANUP
 AT_COMPILE([input.o], [-c input.c])
 
 AT_CLEANUP


@@ -107,7 +105,7 @@ exp: MY_TOKEN;
 %%
 ]])
 
 %%
 ]])
 

-AT_CHECK([bison -y -o input.c input.y])
+AT_BISON_CHECK([-y -o input.c input.y])

 AT_COMPILE([input.o], [-c input.c])
 
 AT_CLEANUP
 AT_COMPILE([input.o], [-c input.c])
 
 AT_CLEANUP


@@ -150,7 +148,7 @@ exp: MY_TOKEN;
 %%
 ]])
 
 %%
 ]])
 

-AT_CHECK([bison -o input.c input.y])
+AT_BISON_CHECK([-o input.c input.y])

 AT_COMPILE([input.o], [-c input.c])
 
 AT_CLEANUP
 AT_COMPILE([input.o], [-c input.c])
 
 AT_CLEANUP


@@ -172,7 +170,7 @@ exp: { tests = {{{{{{{{{{}}}}}}}}}}; };
 %%
 ]])
 
 %%
 ]])
 

-AT_CHECK([bison -v -o input.c input.y])
+AT_BISON_CHECK([-v -o input.c input.y])

 
 AT_CHECK([grep 'tests = {{{{{{{{{{}}}}}}}}}};' input.c], 0, [ignore])
 
 
 AT_CHECK([grep 'tests = {{{{{{{{{{}}}}}}}}}};' input.c], 0, [ignore])
 


@@ -199,7 +197,7 @@ exp: '(' exp ')' | NUM ;
 %%
 ]])
 
 %%
 ]])
 

-AT_CHECK([bison -v -o input.c input.y], 0, [],
+AT_BISON_CHECK([-v -o input.c input.y], 0, [],

 [[input.y:6.8-14: warning: symbol `"<="' used more than once as a literal string
 ]])
 
 [[input.y:6.8-14: warning: symbol `"<="' used more than once as a literal string
 ]])
 


@@ -244,7 +242,7 @@ expr:
 };
 ]])
 
 };
 ]])
 

-AT_CHECK([bison -o input.c -v input.y])
+AT_BISON_CHECK([-o input.c -v input.y])

 
 # Check the contents of the report.
 AT_CHECK([cat input.output], [],
 
 # Check the contents of the report.
 AT_CHECK([cat input.output], [],


@@ -252,13 +250,13 @@ AT_CHECK([cat input.output], [],
 
     0 $accept: expr $end
 
 
     0 $accept: expr $end
 

-    1 @1: /* empty */
+    1 $@1: /* empty */

 
 

-    2 expr: 'a' @1 'b'
+    2 expr: 'a' $@1 'b'

 
 

-    3 @2: /* empty */
+    3 $@2: /* empty */

 
 

-    4 expr: @2 'c'
+    4 expr: $@2 'c'

 
 
 Terminals, with rules where they appear
 
 
 Terminals, with rules where they appear


@@ -276,9 +274,9 @@ $accept (6)
     on left: 0
 expr (7)
     on left: 2 4, on right: 0
     on left: 0
 expr (7)
     on left: 2 4, on right: 0

-@1 (8)
+$@1 (8)

     on left: 1, on right: 2
     on left: 1, on right: 2

-@2 (9)
+$@2 (9)

     on left: 3, on right: 4
 
 
     on left: 3, on right: 4
 
 


@@ -288,19 +286,19 @@ state 0
 
     'a'  shift, and go to state 1
 
 
     'a'  shift, and go to state 1
 

-    $default  reduce using rule 3 (@2)
+    $default  reduce using rule 3 ($@2)

 
     expr  go to state 2
 
     expr  go to state 2

-    @2    go to state 3
+    $@2   go to state 3

 
 
 state 1
 
 
 
 state 1
 

-    2 expr: 'a' . @1 'b'
+    2 expr: 'a' . $@1 'b'

 
 

-    $default  reduce using rule 1 (@1)
+    $default  reduce using rule 1 ($@1)

 
 

-    @1  go to state 4
+    $@1  go to state 4

 
 
 state 2
 
 
 state 2


@@ -312,14 +310,14 @@ state 2
 
 state 3
 
 
 state 3
 

-    4 expr: @2 . 'c'
+    4 expr: $@2 . 'c'

 
     'c'  shift, and go to state 6
 
 
 state 4
 
 
     'c'  shift, and go to state 6
 
 
 state 4
 

-    2 expr: 'a' @1 . 'b'
+    2 expr: 'a' $@1 . 'b'

 
     'b'  shift, and go to state 7
 
 
     'b'  shift, and go to state 7
 


@@ -333,14 +331,14 @@ state 5
 
 state 6
 
 
 state 6
 

-    4 expr: @2 'c' .
+    4 expr: $@2 'c' .

 
     $default  reduce using rule 4 (expr)
 
 
 state 7
 
 
     $default  reduce using rule 4 (expr)
 
 
 state 7
 

-    2 expr: 'a' @1 'b' .
+    2 expr: 'a' $@1 'b' .

 
     $default  reduce using rule 2 (expr)
 ]])
 
     $default  reduce using rule 2 (expr)
 ]])


@@ -366,7 +364,7 @@ exp: ;
 %%
 ]])
 
 %%
 ]])
 

-AT_CHECK([bison -v -o input.c input.y])
+AT_BISON_CHECK([-v -o input.c input.y])

 
 AT_CLEANUP
 
 
 AT_CLEANUP
 


@@ -389,7 +387,7 @@ default: 'a' }
 %{
 ]])
 
 %{
 ]])
 

-AT_CHECK([bison input.y], [1], [],
+AT_BISON_CHECK([input.y], [1], [],

 [[input.y:2.1: invalid character: `?'
 input.y:3.14: invalid character: `}'
 input.y:4.1: invalid character: `%'
 [[input.y:2.1: invalid character: `?'
 input.y:3.14: invalid character: `}'
 input.y:4.1: invalid character: `%'


@@ -416,7 +414,7 @@ AT_DATA([input.y],
 %union
 ]])
 
 %union
 ]])
 

-AT_CHECK([bison input.y], [1], [],
+AT_BISON_CHECK([input.y], [1], [],

 [[input.y:3.1-15: syntax error, unexpected %initial-action, expecting {...}
 ]])
 
 [[input.y:3.1-15: syntax error, unexpected %initial-action, expecting {...}
 ]])
 


@@ -434,6 +432,7 @@ AT_SETUP([Token definitions])
 # Bison managed, when fed with `%token 'f' "f"' to #define 'f'!
 AT_DATA_GRAMMAR([input.y],
 [%{
 # Bison managed, when fed with `%token 'f' "f"' to #define 'f'!
 AT_DATA_GRAMMAR([input.y],
 [%{

+#include <stdlib.h>

 #include <stdio.h>
 void yyerror (const char *s);
 int yylex (void);
 #include <stdio.h>
 void yyerror (const char *s);
 int yylex (void);


@@ -457,6 +456,9 @@ yyerror (char const *s)
 int
 yylex (void)
 {
 int
 yylex (void)
 {

+  static int called;
+  if (called++)
+    abort ();

   return SPECIAL;
 }
 
   return SPECIAL;
 }
 


@@ -467,7 +469,7 @@ main (void)
 }
 ]])
 
 }
 ]])
 

-AT_CHECK([bison -o input.c input.y])
+AT_BISON_CHECK([-o input.c input.y])

 AT_COMPILE([input])
 AT_DATA([experr],
 [[syntax error, unexpected "\\'?\"\a\b\f\n\r\t\v\001\201\001\201?\?!", expecting a
 AT_COMPILE([input])
 AT_DATA([experr],
 [[syntax error, unexpected "\\'?\"\a\b\f\n\r\t\v\001\201\001\201?\?!", expecting a


@@ -498,7 +500,7 @@ exp:
 ]])
 # Pacify font-lock-mode: "
 
 ]])
 # Pacify font-lock-mode: "
 

-AT_CHECK([bison -o input.c input.y])
+AT_BISON_CHECK([-o input.c input.y])

 AT_COMPILE([input.o], [-c input.c])
 AT_CLEANUP
 
 AT_COMPILE([input.o], [-c input.c])
 AT_CLEANUP
 


@@ -538,7 +540,7 @@ CONST_DEC:
 %%
 ]])
 
 %%
 ]])
 

-AT_CHECK([bison -v input.y])
+AT_BISON_CHECK([-v input.y])

 AT_CHECK([cat input.output], 0,
 [[Grammar
 
 AT_CHECK([cat input.output], 0,
 [[Grammar
 


@@ -549,9 +551,9 @@ AT_CHECK([cat input.output], 0,
     2 CONST_DEC_LIST: CONST_DEC
     3               | CONST_DEC_LIST CONST_DEC
 
     2 CONST_DEC_LIST: CONST_DEC
     3               | CONST_DEC_LIST CONST_DEC
 

-    4 @1: /* empty */
+    4 $@1: /* empty */

 
 

-    5 CONST_DEC: @1 undef_id_tok '=' const_id_tok ';'
+    5 CONST_DEC: $@1 undef_id_tok '=' const_id_tok ';'

 
 
 Terminals, with rules where they appear
 
 
 Terminals, with rules where they appear


@@ -574,7 +576,7 @@ CONST_DEC_LIST (9)
     on left: 2 3, on right: 1 3
 CONST_DEC (10)
     on left: 5, on right: 2 3
     on left: 2 3, on right: 1 3
 CONST_DEC (10)
     on left: 5, on right: 2 3

-@1 (11)
+$@1 (11)

     on left: 4, on right: 5
 
 
     on left: 4, on right: 5
 
 


@@ -582,12 +584,12 @@ state 0
 
     0 $accept: . CONST_DEC_PART $end
 
 
     0 $accept: . CONST_DEC_PART $end
 

-    $default  reduce using rule 4 (@1)
+    $default  reduce using rule 4 ($@1)

 
     CONST_DEC_PART  go to state 1
     CONST_DEC_LIST  go to state 2
     CONST_DEC       go to state 3
 
     CONST_DEC_PART  go to state 1
     CONST_DEC_LIST  go to state 2
     CONST_DEC       go to state 3

-    @1              go to state 4
+    $@1             go to state 4

 
 
 state 1
 
 
 state 1


@@ -602,11 +604,11 @@ state 2
     1 CONST_DEC_PART: CONST_DEC_LIST .
     3 CONST_DEC_LIST: CONST_DEC_LIST . CONST_DEC
 
     1 CONST_DEC_PART: CONST_DEC_LIST .
     3 CONST_DEC_LIST: CONST_DEC_LIST . CONST_DEC
 

-    undef_id_tok  reduce using rule 4 (@1)
+    undef_id_tok  reduce using rule 4 ($@1)

     $default      reduce using rule 1 (CONST_DEC_PART)
 
     CONST_DEC  go to state 6
     $default      reduce using rule 1 (CONST_DEC_PART)
 
     CONST_DEC  go to state 6

-    @1         go to state 4
+    $@1        go to state 4

 
 
 state 3
 
 
 state 3


@@ -618,7 +620,7 @@ state 3
 
 state 4
 
 
 state 4
 

-    5 CONST_DEC: @1 . undef_id_tok '=' const_id_tok ';'
+    5 CONST_DEC: $@1 . undef_id_tok '=' const_id_tok ';'

 
     undef_id_tok  shift, and go to state 7
 
 
     undef_id_tok  shift, and go to state 7
 


@@ -639,28 +641,28 @@ state 6
 
 state 7
 
 
 state 7
 

-    5 CONST_DEC: @1 undef_id_tok . '=' const_id_tok ';'
+    5 CONST_DEC: $@1 undef_id_tok . '=' const_id_tok ';'

 
     '='  shift, and go to state 8
 
 
 state 8
 
 
     '='  shift, and go to state 8
 
 
 state 8
 

-    5 CONST_DEC: @1 undef_id_tok '=' . const_id_tok ';'
+    5 CONST_DEC: $@1 undef_id_tok '=' . const_id_tok ';'

 
     const_id_tok  shift, and go to state 9
 
 
 state 9
 
 
     const_id_tok  shift, and go to state 9
 
 
 state 9
 

-    5 CONST_DEC: @1 undef_id_tok '=' const_id_tok . ';'
+    5 CONST_DEC: $@1 undef_id_tok '=' const_id_tok . ';'

 
     ';'  shift, and go to state 10
 
 
 state 10
 
 
     ';'  shift, and go to state 10
 
 
 state 10
 

-    5 CONST_DEC: @1 undef_id_tok '=' const_id_tok ';' .
+    5 CONST_DEC: $@1 undef_id_tok '=' const_id_tok ';' .

 
     $default  reduce using rule 5 (CONST_DEC)
 ]])
 
     $default  reduce using rule 5 (CONST_DEC)
 ]])


@@ -703,10 +705,9 @@ else: "else" statement;
 %%
 ]])
 
 %%
 ]])
 

-AT_CHECK([bison -v -o input.c input.y])
+AT_BISON_CHECK([-v -o input.c input.y])

 
 

-# Check only the tables.  We don't use --no-parser, because it is
-# still to be implemented in the experimental branch of Bison.
+# Check only the tables.

 [sed -n 's/  *$//;/^static const.*\[\] =/,/^}/p' input.c >tables.c]
 
 AT_CHECK([[cat tables.c]], 0,
 [sed -n 's/  *$//;/^static const.*\[\] =/,/^}/p' input.c >tables.c]
 
 AT_CHECK([[cat tables.c]], 0,


@@ -822,7 +823,8 @@ m4_define([_AT_DATA_DANCER_Y],
 [%{
 static int yylex (AT_LALR1_CC_IF([int *], [void]));
 AT_LALR1_CC_IF([],
 [%{
 static int yylex (AT_LALR1_CC_IF([int *], [void]));
 AT_LALR1_CC_IF([],

-[#include <stdio.h>
+[#include <stdlib.h>
+#include <stdio.h>

 static void yyerror (const char *);])
 %}
 $1
 static void yyerror (const char *);])
 %}
 $1


@@ -896,12 +898,14 @@ yyerror (const char *s)
 static int
 yylex (AT_LALR1_CC_IF([int *lval], [void]))
 [{
 static int
 yylex (AT_LALR1_CC_IF([int *lval], [void]))
 [{

-  static int toknum = 0;
-  static int tokens[] =
+  static int const tokens[] =

     {
       ':', -1
     };
     {
       ':', -1
     };

+  static size_t toknum;

   ]AT_LALR1_CC_IF([*lval = 0; /* Pacify GCC.  */])[
   ]AT_LALR1_CC_IF([*lval = 0; /* Pacify GCC.  */])[

+  if (! (toknum < sizeof tokens / sizeof *tokens))
+    abort ();

   return tokens[toknum++];
 }]
 
   return tokens[toknum++];
 }]
 


@@ -921,11 +925,11 @@ m4_define([AT_CHECK_DANCER],
 [AT_SETUP([Dancer $1])
 AT_BISON_OPTION_PUSHDEFS([$1])
 _AT_DATA_DANCER_Y([$1])
 [AT_SETUP([Dancer $1])
 AT_BISON_OPTION_PUSHDEFS([$1])
 _AT_DATA_DANCER_Y([$1])

-AT_CHECK([bison -o dancer.c dancer.y])
+AT_BISON_CHECK([-o dancer.c dancer.y])

 AT_LALR1_CC_IF(
 AT_LALR1_CC_IF(

-  [AT_CHECK([bison -o dancer.cc dancer.y])
+  [AT_BISON_CHECK([-o dancer.cc dancer.y])

    AT_COMPILE_CXX([dancer])],
    AT_COMPILE_CXX([dancer])],

-  [AT_CHECK([bison -o dancer.c dancer.y])
+  [AT_BISON_CHECK([-o dancer.c dancer.y])

    AT_COMPILE([dancer])])
 AT_PARSER_CHECK([./dancer], 1, [],
 [syntax error, unexpected ':'
    AT_COMPILE([dancer])])
 AT_PARSER_CHECK([./dancer], 1, [],
 [syntax error, unexpected ':'


@@ -952,6 +956,7 @@ m4_define([_AT_DATA_EXPECT2_Y],
 static int yylex (AT_LALR1_CC_IF([int *], [void]));
 AT_LALR1_CC_IF([],
 [#include <stdio.h>
 static int yylex (AT_LALR1_CC_IF([int *], [void]));
 AT_LALR1_CC_IF([],
 [#include <stdio.h>

+#include <stdlib.h>

 static void yyerror (const char *);])
 %}
 $1
 static void yyerror (const char *);])
 %}
 $1


@@ -993,12 +998,14 @@ yyerror (const char *s)
 static int
 yylex (AT_LALR1_CC_IF([int *lval], [void]))
 [{
 static int
 yylex (AT_LALR1_CC_IF([int *lval], [void]))
 [{

-  static int toknum = 0;
-  static int tokens[] =
+  static int const tokens[] =

     {
       1000, '+', '+', -1
     };
     {
       1000, '+', '+', -1
     };

+  static size_t toknum;

   ]AT_LALR1_CC_IF([*lval = 0; /* Pacify GCC.  */])[
   ]AT_LALR1_CC_IF([*lval = 0; /* Pacify GCC.  */])[

+  if (! (toknum < sizeof tokens / sizeof *tokens))
+    abort ();

   return tokens[toknum++];
 }]
 
   return tokens[toknum++];
 }]
 


@@ -1018,11 +1025,11 @@ m4_define([AT_CHECK_EXPECT2],
 [AT_SETUP([Expecting two tokens $1])
 AT_BISON_OPTION_PUSHDEFS([$1])
 _AT_DATA_EXPECT2_Y([$1])
 [AT_SETUP([Expecting two tokens $1])
 AT_BISON_OPTION_PUSHDEFS([$1])
 _AT_DATA_EXPECT2_Y([$1])

-AT_CHECK([bison -o expect2.c expect2.y])
+AT_BISON_CHECK([-o expect2.c expect2.y])

 AT_LALR1_CC_IF(
 AT_LALR1_CC_IF(

-  [AT_CHECK([bison -o expect2.cc expect2.y])
+  [AT_BISON_CHECK([-o expect2.cc expect2.y])

    AT_COMPILE_CXX([expect2])],
    AT_COMPILE_CXX([expect2])],

-  [AT_CHECK([bison -o expect2.c expect2.y])
+  [AT_BISON_CHECK([-o expect2.c expect2.y])

    AT_COMPILE([expect2])])
 AT_PARSER_CHECK([./expect2], 1, [],
 [syntax error, unexpected '+', expecting A or B
    AT_COMPILE([expect2])])
 AT_PARSER_CHECK([./expect2], 1, [],
 [syntax error, unexpected '+', expecting A or B


@@ -1089,14 +1096,14 @@ main (void)
 }
 ]])
 
 }
 ]])
 

-AT_CHECK([bison -t -o input.c input.y])
+AT_BISON_CHECK([-t -o input.c input.y])

 AT_COMPILE([input])
 AT_PARSER_CHECK([./input], 0,
 [[Bison would once convert this action to a midrule because of the subsequent braced code.
 ]],
 [[Starting parse
 Entering state 0
 AT_COMPILE([input])
 AT_PARSER_CHECK([./input], 0,
 [[Bison would once convert this action to a midrule because of the subsequent braced code.
 ]],
 [[Starting parse
 Entering state 0

-Reducing stack by rule 1 (line 22):
+Reducing stack by rule 1 (line 20):

 -> $$ = nterm start ()
 Stack now 0
 Entering state 1
 -> $$ = nterm start ()
 Stack now 0
 Entering state 1


@@ -1130,6 +1137,108 @@ start: 'a' "A" 'b';
 %token 'a' "A";
 ]])
 
 %token 'a' "A";
 ]])
 

-AT_CHECK([bison -t -o input.c input.y])
+AT_BISON_CHECK([-t -o input.c input.y])
+
+AT_CLEANUP
+
+
+
+## -------------------------------- ##
+## Extra lookahead sets in report.  ##
+## -------------------------------- ##
+
+AT_SETUP([[Extra lookahead sets in report]])
+
+# Bison prints each reduction's lookahead set only next to the associated
+# state's one item that (1) is associated with the same rule as the reduction
+# and (2) has its dot at the end of its RHS.  Previously, Bison also
+# erroneously printed the lookahead set next to all of the state's other items
+# associated with the same rule.  This bug affected only the `.output' file and
+# not the generated parser source code.
+
+AT_DATA([[input.y]],
+[[%%
+start: a | 'a' a 'a' ;
+a: 'a' ;
+]])
+
+AT_BISON_CHECK([[--report=all input.y]])
+AT_CHECK([[sed -n '/^state 1$/,/^state 2$/p' input.output]], [[0]],
+[[state 1
+
+    2 start: 'a' . a 'a'
+    3 a: . 'a'
+    3  | 'a' .  [$end]
+
+    'a'  shift, and go to state 4
+
+    $default  reduce using rule 3 (a)
+
+    a  go to state 5
+
+
+state 2
+]])
+
+AT_CLEANUP
+
+
+
+## ---------------------------------------- ##
+## Token number in precedence declaration.  ##
+## ---------------------------------------- ##
+
+AT_SETUP([[Token number in precedence declaration.]])
+
+# POSIX says token numbers can be declared in %left, %right, and %nonassoc, but
+# we lost this in Bison 1.50.
+
+AT_DATA_GRAMMAR([input.y],
+[[%{
+  #include <stdio.h>
+  void yyerror (char const *);
+  int yylex (void);
+%}
+
+%error-verbose
+%left TK1 1 TK2 2 "tok alias" 3
+
+%%
+
+start: TK1 sr_conflict "tok alias" ;
+
+sr_conflict:
+  TK2
+  | TK2 "tok alias"
+  ;
+
+%%
+
+void
+yyerror (char const *msg)
+{
+  fprintf (stderr, "%s\n", msg);
+}
+
+int
+yylex (void)
+{
+  static int const input[] = { 1, 2, 3, 0 };
+  static int const *inputp = input;
+  return *inputp++;
+}
+
+int
+main (void)
+{
+  return yyparse ();
+}
+]])
+
+AT_BISON_CHECK([[-o input.c input.y]], [[0]],,
+[[input.y:24.5-19: warning: rule useless in parser due to conflicts: sr_conflict: TK2 "tok alias"
+]])
+AT_COMPILE([[input]])
+AT_PARSER_CHECK([[./input]])

 
 AT_CLEANUP
 
 AT_CLEANUP