* src/reader.c (grammar_current_rule_check): Also check that $$

[bison.git] / tests / actions.at

diff --git a/tests/actions.at b/tests/actions.at
index 18140cecc79e48f023b52643e3a352cd3fd15c6e..bd71bbc8c4af602f86fa5484fc45431eb9fbd6f4 100644 (file)
--- a/tests/actions.at
+++ b/tests/actions.at
@@ -1,5 +1,5 @@
 # Executing Actions.                               -*- Autotest -*-
 # Executing Actions.                               -*- Autotest -*-

-# Copyright 2001 Free Software Foundation, Inc.
+# Copyright (C) 2001, 2002, 2003, 2004, 2005 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


@@ -13,8 +13,8 @@
 
 # You should have received a copy of the GNU General Public License
 # along with this program; if not, write to the Free Software
 
 # 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., 59 Temple Place - Suite 330, Boston, MA
-# 02111-1307, USA.
+# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+# 02110-1301, USA.

 
 AT_BANNER([[User Actions.]])
 
 
 AT_BANNER([[User Actions.]])
 


@@ -30,13 +30,13 @@ AT_SETUP([Mid-rule actions])
 # action.
 
 AT_DATA_GRAMMAR([[input.y]],
 # action.
 
 AT_DATA_GRAMMAR([[input.y]],

-[[%{
+[[%error-verbose
+%debug
+%{

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

-# define YYDEBUG         1
-# define YYERROR_VERBOSE 1

 %}
 %%
 exp:     { putchar ('0'); }
 %}
 %%
 exp:     { putchar ('0'); }


@@ -82,151 +82,6 @@ AT_CLEANUP
 
 
 
 
 
 

-## ---------------------- ##
-## Actions after errors.  ##
-## ---------------------- ##
-
-AT_SETUP([Actions after errors])
-
-
-
-AT_DATA_GRAMMAR([[input.y]],
-[[%{
-#include <stdio.h>
-#include <stdlib.h>
-
-static int yylex (void);
-static void yyerror (char const *);
-
-#define YYDEBUG 1
-%}
-%union { int ival; }
-%type <ival> 'x' ';' thing line input
-
-%%
-input:
-  /* Nothing. */
-    {
-      $$ = 0;
-      printf ("input(%d): /* Nothing */\n", $$);
-    }
-| line input /* Right recursive to load the stack so that popping at
-               EOF can be exercised.  */
-    {
-      $$ = 2;
-      printf ("input(%d): line(%d) input(%d)\n", $$, $1, $2);
-    }
-;
-
-line:
-  thing thing thing ';'
-    {
-      $$ = $1;
-      printf ("line(%d): thing(%d) thing(%d) thing(%d) ';'(%d)\n",
-             $$, $1, $2, $3, $4);
-    }
-| thing thing ';'
-    {
-      $$ = $1;
-      printf ("line(%d): thing(%d) thing(%d) ';'(%d)\n", $$, $1, $2, $3);
-    }
-| thing ';'
-    {
-      $$ = $1;
-      printf ("line(%d): thing(%d) ';'(%d)\n", $$, $1, $2);
-    }
-| error ';'
-    {
-      $$ = -1;
-      printf ("line(%d): error ';'(%d)\n", $$, $2);
-    }
-;
-
-thing:
-  'x'
-    {
-      $$ = $1;
-      printf ("thing(%d): 'x'(%d)\n", $$, $1);
-    }
-;
-%%
-static size_t counter;
-
-static int
-yylex (void)
-{
-  static char const input[] =
-    {
-      /* Exericise the discarding of stack top and input until `error'
-         can be reduced.  */
-      'x', 'x', 'x', 'x', 'x', 'x', ';',
-
-      /* Load the stack and provoke an error that cannot be caught by
-         the grammar, to check that the stack is cleared. */
-      'x', 'x', ';',
-      'x', ';',
-      'y'
-    };
-
-  if (counter < sizeof input)
-    {
-       yylval.ival = counter;
-       printf ("sending: '%c' (value = %d)\n", input[counter], yylval.ival);
-       return input[counter++];
-    }
-  else
-    {
-      printf ("sending: EOF\n");
-      return EOF;
-    }
-}
-
-static void
-yyerror (char const *msg)
-{
-  printf ("%lu: %s\n", (unsigned long int) counter, msg);
-}
-
-int
-main (void)
-{
-  yydebug = !!getenv ("YYDEBUG");
-  return yyparse ();
-}
-]])
-
-AT_CHECK([bison -o input.c input.y])
-AT_COMPILE([input])
-AT_PARSER_CHECK([./input], 1,
-[[sending: 'x' (value = 0)
-thing(0): 'x'(0)
-sending: 'x' (value = 1)
-thing(1): 'x'(1)
-sending: 'x' (value = 2)
-thing(2): 'x'(2)
-sending: 'x' (value = 3)
-4: syntax error
-sending: 'x' (value = 4)
-sending: 'x' (value = 5)
-sending: ';' (value = 6)
-line(-1): error ';'(6)
-sending: 'x' (value = 7)
-thing(7): 'x'(7)
-sending: 'x' (value = 8)
-thing(8): 'x'(8)
-sending: ';' (value = 9)
-line(7): thing(7) thing(8) ';'(9)
-sending: 'x' (value = 10)
-thing(10): 'x'(10)
-sending: ';' (value = 11)
-line(10): thing(10) ';'(11)
-sending: 'y' (value = 12)
-13: syntax error
-sending: EOF
-]])
-
-AT_CLEANUP
-

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


@@ -236,13 +91,14 @@ AT_CLEANUP
 AT_SETUP([Exotic Dollars])
 
 AT_DATA_GRAMMAR([[input.y]],
 AT_SETUP([Exotic Dollars])
 
 AT_DATA_GRAMMAR([[input.y]],

-[[%{
+[[%error-verbose
+%debug
+%{

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

-# define YYDEBUG         1
-# define YYERROR_VERBOSE 1
+# define USE(Var)

 %}
 
 %union
 %}
 
 %union


@@ -251,7 +107,7 @@ AT_DATA_GRAMMAR([[input.y]],
 };
 
 %type <val> a_1 a_2 a_5
 };
 
 %type <val> a_1 a_2 a_5

-            sum_of_the_five_previous_values
+            exp sum_of_the_five_previous_values

 
 %%
 exp: a_1 a_2 { $<val>$ = 3; } { $<val>$ = $<val>3 + 1; } a_5
 
 %%
 exp: a_1 a_2 { $<val>$ = 3; } { $<val>$ = $<val>3 + 1; } a_5


@@ -290,7 +146,11 @@ main (void)
 }
 ]])
 
 }
 ]])
 

-AT_CHECK([bison -d -v -o input.c input.y])
+AT_CHECK([bison -d -v -o input.c input.y], 0, [], 
+[input.y:30.6-34.5: warning: unused value: $1
+input.y:30.6-34.5: warning: unused value: $2
+input.y:30.6-34.5: warning: unused value: $5
+])

 AT_COMPILE([input])
 AT_PARSER_CHECK([./input], 0,
 [[15
 AT_COMPILE([input])
 AT_PARSER_CHECK([./input], 0,
 [[15


@@ -304,68 +164,92 @@ AT_CLEANUP
 ## Printers and Destructors.  ##
 ## -------------------------- ##
 
 ## Printers and Destructors.  ##
 ## -------------------------- ##
 

-# _AT_CHECK_PRINTER_AND_DESTRUCTOR($1, $2, $3, BISON-DIRECTIVE)
-# -------------------------------------------------------------
+# _AT_CHECK_PRINTER_AND_DESTRUCTOR($1, $2, $3, $4, BISON-DIRECTIVE, UNION-FLAG)
+# -----------------------------------------------------------------------------

 m4_define([_AT_CHECK_PRINTER_AND_DESTRUCTOR],
 m4_define([_AT_CHECK_PRINTER_AND_DESTRUCTOR],

-[m4_if([$1$2$3], $[1]$[2]$[3], [],
+[# Make sure complex $n work.
+m4_if([$1$2$3], $[1]$[2]$[3], [],

        [m4_fatal([$0: Invalid arguments: $@])])dnl
 
        [m4_fatal([$0: Invalid arguments: $@])])dnl
 

-AT_SETUP([Printers and Destructors: $4])
-
-# Make sure complex $n work.
-
+# Be sure to pass all the %directives to this macro to have correct
+# helping macros.  So don't put any directly in the Bison file.
+AT_BISON_OPTION_PUSHDEFS([$5])

 AT_DATA_GRAMMAR([[input.y]],
 AT_DATA_GRAMMAR([[input.y]],

-[[$4
-%{
+[[%{

 #include <stdio.h>
 #include <stdlib.h>
 #include <assert.h>
 
 #include <stdio.h>
 #include <stdlib.h>
 #include <assert.h>
 

-static int yylex (void);
-static void yyerror (const char *msg);
-%}
-%error-verbose
-%debug
-%verbose
-%locations
-%union
+#define YYINITDEPTH 10
+#define YYMAXDEPTH 10
+]AT_LALR1_CC_IF(
+  [#define RANGE(Location) (Location).begin.line, (Location).end.line],
+  [#define RANGE(Location) (Location).first_line, (Location).last_line])
+[%}
+
+$5]
+m4_ifval([$6], [%union

 {
   int ival;
 {
   int ival;

-}
-%type <ival> 'x' thing line input
+}])
+AT_LALR1_CC_IF([%define "global_tokens_and_yystype"])
+[
+%{
+]AT_LALR1_CC_IF([typedef yy::location YYLTYPE;
+                m4_ifval([$6], , [#define YYSTYPE int])])
+[static int yylex (]AT_LEX_FORMALS[);
+]AT_LALR1_CC_IF([], [static void yyerror (const char *msg);])
+[%}
+
+]m4_ifval([$6], [%type <ival> '(' 'x' 'y' ')' ';' thing line input])[

 
 

-%printer { fprintf (yyout, "%d@%d", $$, @$.first_line); }
-   input line thing 'x'
+%printer
+  {
+    ]AT_LALR1_CC_IF([debug_stream () << $$;],
+                    [fprintf (yyoutput, "%d", $$)])[;
+  }
+  input line thing 'x' 'y'

 
 %destructor
 
 %destructor

-  { fprintf (stdout, "Freeing nterm input (%d@%d)\n", $$, @$.first_line); }
+  { printf ("Freeing nterm input (%d@%d-%d)\n", $$, RANGE (@$)); }

   input
 
 %destructor
   input
 
 %destructor

-  { fprintf (stdout, "Freeing nterm line (%d@%d)\n", $$, @$.first_line); }
+  { printf ("Freeing nterm line (%d@%d-%d)\n", $$, RANGE (@$)); }

   line
 
 %destructor
   line
 
 %destructor

-  { fprintf (stdout, "Freeing nterm thing (%d@%d)\n", $$, @$.first_line); }
+  { printf ("Freeing nterm thing (%d@%d-%d)\n", $$, RANGE (@$)); }

   thing
 
 %destructor
   thing
 
 %destructor

-  { fprintf (stdout, "Freeing token 'x' (%d@%d)\n", $$, @$.first_line); }
+  { printf ("Freeing token 'x' (%d@%d-%d)\n", $$, RANGE (@$)); }

   'x'
 
   'x'
 

+%destructor
+  { printf ("Freeing token 'y' (%d@%d-%d)\n", $$, RANGE (@$)); }
+  'y'
+

 %%
 %%

+/*
+   This grammar is made to exercise error recovery.
+   "Lines" starting with `(' support error recovery, with
+   ')' as synchronizing token.  Lines starting with 'x' can never
+   be recovered from if in error.
+*/
+

 input:
   /* Nothing. */
     {
       $$ = 0;
 input:
   /* Nothing. */
     {
       $$ = 0;

-      printf ("input(%d@%d): /* Nothing */';'\n", $$, @$.first_line);
+      printf ("input (%d@%d-%d): /* Nothing */\n", $$, RANGE (@$));

     }
 | line input /* Right recursive to load the stack so that popping at
                EOF can be exercised.  */
     {
       $$ = 2;
     }
 | line input /* Right recursive to load the stack so that popping at
                EOF can be exercised.  */
     {
       $$ = 2;

-      printf ("input(%d@%d): line(%d@%d) input(%d@%d)';'\n",
-             $$, @$.first_line, $1, @1.first_line, $2, @2.first_line);
+      printf ("input (%d@%d-%d): line (%d@%d-%d) input (%d@%d-%d)\n",
+             $$, RANGE (@$), $1, RANGE (@1), $2, RANGE (@2));

     }
 ;
 
     }
 ;
 


@@ -373,27 +257,28 @@ line:
   thing thing thing ';'
     {
       $$ = $1;
   thing thing thing ';'
     {
       $$ = $1;

-      printf ("line(%d@%d): thing(%d@%d) thing(%d@%d) thing(%d@%d) ';'\n",
-              $$, @$.first_line, $1, @1.first_line, $2, @2.first_line,
-              $3, @3.first_line);
+      printf ("line (%d@%d-%d): thing (%d@%d-%d) thing (%d@%d-%d) thing (%d@%d-%d) ';' (%d@%d-%d)\n",
+              $$, RANGE (@$), $1, RANGE (@1), $2, RANGE (@2),
+              $3, RANGE (@3), $4, RANGE (@4));

     }
     }

-| thing thing ';'
+| '(' thing thing ')'

     {
       $$ = $1;
     {
       $$ = $1;

-      printf ("line(%d@%d): thing(%d@%d) thing(%d@%d) ';'\n",
-              $$, @$.first_line, $1, @1.first_line, $2, @2.first_line);
+      printf ("line (%d@%d-%d): '(' (%d@%d-%d) thing (%d@%d-%d) thing (%d@%d-%d) ')' (%d@%d-%d)\n",
+              $$, RANGE (@$), $1, RANGE (@1), $2, RANGE (@2),
+              $3, RANGE (@3), $4, RANGE (@4));

     }
     }

-| thing ';'
+| '(' thing ')'

     {
       $$ = $1;
     {
       $$ = $1;

-      printf ("line(%d@%d): thing(%d@%d) ';'\n",
-              $$, @$.first_line, $1, @1.first_line);
+      printf ("line (%d@%d-%d): '(' (%d@%d-%d) thing (%d@%d-%d) ')' (%d@%d-%d)\n",
+              $$, RANGE (@$), $1, RANGE (@1), $2, RANGE (@2), $3, RANGE (@3));

     }
     }

-| error ';'
+| '(' error ')'

     {
       $$ = -1;
     {
       $$ = -1;

-      printf ("line(%d@%d): error(@%d) ';'\n",
-              $$, @$.first_line, @1.first_line);
+      printf ("line (%d@%d-%d): '(' (%d@%d-%d) error (@%d-%d) ')' (%d@%d-%d)\n",
+              $$, RANGE (@$), $1, RANGE (@1), RANGE (@2), $3, RANGE (@3));

     }
 ;
 
     }
 ;
 


@@ -401,115 +286,255 @@ thing:
   'x'
     {
       $$ = $1;
   'x'
     {
       $$ = $1;

-      printf ("thing(%d@%d): 'x'(%d@%d)\n",
-              $$, @$.first_line, $1, @1.first_line);
+      printf ("thing (%d@%d-%d): 'x' (%d@%d-%d)\n",
+              $$, RANGE (@$), $1, RANGE (@1));

     }
 ;
 %%
     }
 ;
 %%

+/* Alias to ARGV[1]. */
+const char *source = 0;
+

 static int
 static int

-yylex (void)
+yylex (]AT_LEX_FORMALS[)

 {
 {

-  static const unsigned int input[] =
-    {
-      /* Exericise the discarding of stack top and input until `error'
-         can be reduced.  */
-      'x', 'x', 'x', 'x', 'x', 'x', ';',
-
-      /* Load the stack and provoke an error that cannot be caught by
-         the grammar, to check that the stack is cleared. */
-      'x', 'x', ';',
-      'x', ';',
-      'y'
-    };

   static unsigned int counter = 0;
 
   static unsigned int counter = 0;
 

-  if (counter < (sizeof(input) / sizeof (input[0])))
-    {
-       yylval.ival = counter;
-       /* As in BASIC, line numbers go from 10 to 10.  */
-       yylloc.first_line = 10 * counter;
-       printf ("sending: '%c' (value = %d, line %d)\n",
-               input[counter], yylval.ival, yylloc.first_line);
-       return (int) input[counter++];
-    }
+  int c = ]AT_VAL[]m4_ifval([$6], [.ival])[ = counter++;
+  /* As in BASIC, line numbers go from 10 to 10.  */
+]AT_LALR1_CC_IF(
+[ AT_LOC.begin.line = AT_LOC.begin.column = 10 * c;
+  AT_LOC.end.line = AT_LOC.end.column = AT_LOC.begin.line + 9;
+],
+[ AT_LOC.first_line = AT_LOC.first_column = 10 * c;
+  AT_LOC.last_line = AT_LOC.last_column = AT_LOC.first_line + 9;
+])[
+
+  if (source[c])
+    printf ("sending: '%c'", source[c]);

   else
   else

-    {
-      printf ("sending: EOF\n");
-      return EOF;
-    }
+    printf ("sending: EOF");
+  printf (" (%d@%d-%d)\n", c, RANGE (]AT_LOC[));
+  return source[c];

 }
 
 }
 

-static void
-yyerror (const char *msg)
+]AT_LALR1_CC_IF(
+[/* A C++ error reporting function. */
+void
+yy::parser::error (const location& l, const std::string& m)

 {
 {

-  fprintf (stdout, "%d: %s\n", yylloc.first_line, msg);
+  printf ("%d-%d: %s\n", RANGE (l), m.c_str());

 }
 
 }
 

+static bool yydebug;

 int
 int

-main (void)
+yyparse ()

 {
 {

+  yy::parser parser;
+  parser.set_debug_level (yydebug);
+  return parser.parse ();
+}
+],
+[static void
+yyerror (const char *msg)
+{
+  printf ("%d-%d: %s\n", RANGE (yylloc), msg);
+}])[
+
+int
+main (int argc, const char *argv[])
+{
+  int status;

   yydebug = !!getenv ("YYDEBUG");
   yydebug = !!getenv ("YYDEBUG");

-  if (yyparse ())
+  assert (argc == 2);
+  source = argv[1];
+  status = yyparse ();
+  switch (status)

     {
     {

-      fprintf (stdout, "Parsing FAILED.\n");
-      exit (1);
+      case 0: printf ("Successful parse.\n"); break;
+      case 1: printf ("Parsing FAILED.\n"); break;
+      default: printf ("Parsing FAILED (status %d).\n", status); break;

     }
     }

-  fprintf (stdout, "Successful parse.\n");
-  return 0;
+  return status;

 }
 ]])
 
 }
 ]])
 

-AT_CHECK([bison -o input.c input.y])
-AT_COMPILE([input])
-AT_PARSER_CHECK([./input], 1,
-[[sending: 'x' (value = 0, line 0)
-thing(0@0): 'x'(0@0)
-sending: 'x' (value = 1, line 10)
-thing(1@10): 'x'(1@10)
-sending: 'x' (value = 2, line 20)
-thing(2@20): 'x'(2@20)
-sending: 'x' (value = 3, line 30)
-30: syntax error, unexpected 'x', expecting ';'
-Freeing nterm thing (2@20)
-Freeing nterm thing (1@10)
-Freeing nterm thing (0@0)
-Freeing token 'x' (3@30)
-sending: 'x' (value = 4, line 40)
-Freeing token 'x' (4@40)
-sending: 'x' (value = 5, line 50)
-Freeing token 'x' (5@50)
-sending: ';' (value = 6, line 60)
-line(-1@50): error(@50) ';'
-sending: 'x' (value = 7, line 70)
-thing(7@70): 'x'(7@70)
-sending: 'x' (value = 8, line 80)
-thing(8@80): 'x'(8@80)
-sending: ';' (value = 9, line 90)
-line(7@70): thing(7@70) thing(8@80) ';'
-sending: 'x' (value = 10, line 100)
-thing(10@100): 'x'(10@100)
-sending: ';' (value = 11, line 110)
-line(10@100): thing(10@100) ';'
-sending: 'y' (value = 12, line 120)
-120: syntax error, unexpected $undefined, expecting $end or 'x'
-sending: EOF
-Freeing nterm line (10@100)
-Freeing nterm line (7@70)
-Freeing nterm line (-1@50)
+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])])
+
+
+# Check the location of "empty"
+# -----------------------------
+# I.e., epsilon-reductions, as in "(x)" which ends by reducing
+# an empty "line" nterm.
+# FIXME: This location is not satisfying.  Depend on the lookahead?
+AT_PARSER_CHECK([./input '(x)'], 0,
+[[sending: '(' (0@0-9)
+sending: 'x' (1@10-19)
+thing (1@10-19): 'x' (1@10-19)
+sending: ')' (2@20-29)
+line (0@0-29): '(' (0@0-9) thing (1@10-19) ')' (2@20-29)
+sending: EOF (3@30-39)
+input (0@29-29): /* Nothing */
+input (2@0-29): line (0@0-29) input (0@29-29)
+Freeing nterm input (2@0-29)
+Successful parse.
+]])
+
+
+# Check locations in error recovery
+# ---------------------------------
+# '(y)' is an error, but can be recovered from.  But what's the location
+# of the error itself ('y'), and of the resulting reduction ('(error)').
+AT_PARSER_CHECK([./input '(y)'], 0,
+[[sending: '(' (0@0-9)
+sending: 'y' (1@10-19)
+10-19: syntax error, unexpected 'y', expecting 'x'
+Freeing token 'y' (1@10-19)
+sending: ')' (2@20-29)
+line (-1@0-29): '(' (0@0-9) error (@10-19) ')' (2@20-29)
+sending: EOF (3@30-39)
+input (0@29-29): /* Nothing */
+input (2@0-29): line (-1@0-29) input (0@29-29)
+Freeing nterm input (2@0-29)
+Successful parse.
+]])
+
+
+# Syntax errors caught by the parser
+# ----------------------------------
+# Exercise the discarding of stack top and input until `error'
+# can be reduced.
+#
+#     '(', 'x', 'x', 'x', 'x', 'x', ')',
+#
+# Load the stack and provoke an error that cannot be caught by the
+# grammar, to check that the stack is cleared.  And make sure the
+# lookahead is freed.
+#
+#     '(', 'x', ')',
+#     '(', 'x', ')',
+#     'y'
+AT_PARSER_CHECK([./input '(xxxxx)(x)(x)y'], 1,
+[[sending: '(' (0@0-9)
+sending: 'x' (1@10-19)
+thing (1@10-19): 'x' (1@10-19)
+sending: 'x' (2@20-29)
+thing (2@20-29): 'x' (2@20-29)
+sending: 'x' (3@30-39)
+30-39: syntax error, unexpected 'x', expecting ')'
+Freeing nterm thing (2@20-29)
+Freeing nterm thing (1@10-19)
+Freeing token 'x' (3@30-39)
+sending: 'x' (4@40-49)
+Freeing token 'x' (4@40-49)
+sending: 'x' (5@50-59)
+Freeing token 'x' (5@50-59)
+sending: ')' (6@60-69)
+line (-1@0-69): '(' (0@0-9) error (@10-59) ')' (6@60-69)
+sending: '(' (7@70-79)
+sending: 'x' (8@80-89)
+thing (8@80-89): 'x' (8@80-89)
+sending: ')' (9@90-99)
+line (7@70-99): '(' (7@70-79) thing (8@80-89) ')' (9@90-99)
+sending: '(' (10@100-109)
+sending: 'x' (11@110-119)
+thing (11@110-119): 'x' (11@110-119)
+sending: ')' (12@120-129)
+line (10@100-129): '(' (10@100-109) thing (11@110-119) ')' (12@120-129)
+sending: 'y' (13@130-139)
+input (0@129-129): /* Nothing */
+input (2@100-129): line (10@100-129) input (0@129-129)
+input (2@70-129): line (7@70-99) input (2@100-129)
+input (2@0-129): line (-1@0-69) input (2@70-129)
+130-139: syntax error, unexpected 'y', expecting $end
+Freeing nterm input (2@0-129)
+Freeing token 'y' (13@130-139)

 Parsing FAILED.
 ]])
 
 Parsing FAILED.
 ]])
 

-AT_CLEANUP
+# Check destruction upon stack overflow
+# -------------------------------------
+# Upon stack overflow, all symbols on the stack should be destroyed.
+# Only check for yacc.c.
+AT_YACC_IF([
+AT_PARSER_CHECK([./input '(x)(x)(x)(x)(x)(x)(x)'], 2,
+[[sending: '(' (0@0-9)
+sending: 'x' (1@10-19)
+thing (1@10-19): 'x' (1@10-19)
+sending: ')' (2@20-29)
+line (0@0-29): '(' (0@0-9) thing (1@10-19) ')' (2@20-29)
+sending: '(' (3@30-39)
+sending: 'x' (4@40-49)
+thing (4@40-49): 'x' (4@40-49)
+sending: ')' (5@50-59)
+line (3@30-59): '(' (3@30-39) thing (4@40-49) ')' (5@50-59)
+sending: '(' (6@60-69)
+sending: 'x' (7@70-79)
+thing (7@70-79): 'x' (7@70-79)
+sending: ')' (8@80-89)
+line (6@60-89): '(' (6@60-69) thing (7@70-79) ')' (8@80-89)
+sending: '(' (9@90-99)
+sending: 'x' (10@100-109)
+thing (10@100-109): 'x' (10@100-109)
+sending: ')' (11@110-119)
+line (9@90-119): '(' (9@90-99) thing (10@100-109) ')' (11@110-119)
+sending: '(' (12@120-129)
+sending: 'x' (13@130-139)
+thing (13@130-139): 'x' (13@130-139)
+sending: ')' (14@140-149)
+line (12@120-149): '(' (12@120-129) thing (13@130-139) ')' (14@140-149)
+sending: '(' (15@150-159)
+sending: 'x' (16@160-169)
+thing (16@160-169): 'x' (16@160-169)
+sending: ')' (17@170-179)
+line (15@150-179): '(' (15@150-159) thing (16@160-169) ')' (17@170-179)
+sending: '(' (18@180-189)
+sending: 'x' (19@190-199)
+thing (19@190-199): 'x' (19@190-199)
+sending: ')' (20@200-209)
+200-209: memory exhausted
+Freeing nterm thing (19@190-199)
+Freeing nterm line (15@150-179)
+Freeing nterm line (12@120-149)
+Freeing nterm line (9@90-119)
+Freeing nterm line (6@60-89)
+Freeing nterm line (3@30-59)
+Freeing nterm line (0@0-29)
+Parsing FAILED (status 2).
+]])
+])
+

 ])
 
 
 ])
 
 

-# AT_CHECK_PRINTER_AND_DESTRUCTOR([BISON-OPTIONS])
-# ------------------------------------------------
-# Produce `calc.y'.
+# AT_CHECK_PRINTER_AND_DESTRUCTOR([BISON-OPTIONS], [UNION-FLAG], [SKIP_FLAG])
+# ---------------------------------------------------------------------------

 m4_define([AT_CHECK_PRINTER_AND_DESTRUCTOR],
 m4_define([AT_CHECK_PRINTER_AND_DESTRUCTOR],

-[_AT_CHECK_PRINTER_AND_DESTRUCTOR($[1], $[2], $[3], [$1])
+[AT_SETUP([Printers and Destructors $2: $1])
+
+$3
+_AT_CHECK_PRINTER_AND_DESTRUCTOR($[1], $[2], $[3], $[4],
+[%error-verbose
+%debug
+%verbose
+%locations
+$1], [$2])
+
+AT_CLEANUP

 ])
 
 
 ])
 
 

-AT_CHECK_PRINTER_AND_DESTRUCTOR()
+AT_CHECK_PRINTER_AND_DESTRUCTOR([])
+AT_CHECK_PRINTER_AND_DESTRUCTOR([], [with union])
+
+# These tests currently fail on a Debian GNU/Linux 3.0r2 x86 host,
+# but the 2nd test succeeds on a Solaris 9 sparc hosts (Forte 7 cc).
+# Skip them until we figure out what the problem is.
+AT_CHECK_PRINTER_AND_DESTRUCTOR([%defines %skeleton "lalr1.cc"])
+AT_CHECK_PRINTER_AND_DESTRUCTOR([%defines %skeleton "lalr1.cc"], [with union])
+

 AT_CHECK_PRINTER_AND_DESTRUCTOR([%glr-parser])
 AT_CHECK_PRINTER_AND_DESTRUCTOR([%glr-parser])

+AT_CHECK_PRINTER_AND_DESTRUCTOR([%glr-parser], [with union])