Support yyerrok in lalr1.cc.

[bison.git] / tests / calc.at

diff --git a/tests/calc.at b/tests/calc.at
index ddc86464cdf823626e2a82a53742060457d59bf3..189b5b35803b49c92103180db5501ba729205b9f 100644 (file)
--- a/tests/calc.at
+++ b/tests/calc.at
@@ -1,22 +1,20 @@
-# Checking the output filenames.                         -*- Autotest -*-
-# Copyright 2000, 2001 Free Software Foundation, Inc.
+# Simple calculator.                         -*- Autotest -*-

 
 

-# 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) 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007 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.
 # 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., 59 Temple Place - Suite 330, Boston, MA
-# 02111-1307, USA.
-
-AT_BANNER([[Simple Calculator.]])
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.

 
 ## ---------------------------------------------------- ##
 ## Compile the grammar described in the documentation.  ##
 
 ## ---------------------------------------------------- ##
 ## Compile the grammar described in the documentation.  ##


@@ -28,8 +26,8 @@ AT_BANNER([[Simple Calculator.]])
 # ------------------------- #
 
 
 # ------------------------- #
 
 

-# _AT_DATA_CALC_Y($1, $2, $3, [CPP-DIRECTIVES])
-# ---------------------------------------------
+# _AT_DATA_CALC_Y($1, $2, $3, [BISON-DIRECTIVES])
+# -----------------------------------------------

 # Produce `calc.y'.  Don't call this macro directly, because it contains
 # some occurrences of `$1' etc. which will be interpreted by m4.  So
 # you should call it with $1, $2, and $3 as arguments, which is what
 # Produce `calc.y'.  Don't call this macro directly, because it contains
 # some occurrences of `$1' etc. which will be interpreted by m4.  So
 # you should call it with $1, $2, and $3 as arguments, which is what


@@ -37,40 +35,74 @@ AT_BANNER([[Simple Calculator.]])
 m4_define([_AT_DATA_CALC_Y],
 [m4_if([$1$2$3], $[1]$[2]$[3], [],
        [m4_fatal([$0: Invalid arguments: $@])])dnl
 m4_define([_AT_DATA_CALC_Y],
 [m4_if([$1$2$3], $[1]$[2]$[3], [],
        [m4_fatal([$0: Invalid arguments: $@])])dnl

-AT_DATA([calc.y],
+AT_DATA_GRAMMAR([calc.y],

 [[/* Infix notation calculator--calc */
 [[/* Infix notation calculator--calc */

-
+]$4
+AT_SKEL_CC_IF(
+[%define global_tokens_and_yystype])[

 %{
 %{

-#include <config.h>
-/* We don't need a perfect malloc for these tests. */
-#undef malloc

 #include <stdio.h>
 
 #include <stdio.h>
 

-#if STDC_HEADERS
-# include <stdlib.h>
-# include <string.h>
+#include <stdlib.h>
+#include <string.h>
+#if HAVE_UNISTD_H
+# include <unistd.h>

 #else
 #else

-char *strcat(char *dest, const char *src);
+# undef alarm
+# define alarm(seconds) /* empty */

 #endif
 #include <ctype.h>
 #endif
 #include <ctype.h>

+#define USE(Var)

 
 

-static int power (int base, int exponent);
-static void yyerror (const char *s);
-static int yylex (void);
-static int yygetc (void);
-static void yyungetc (int c);
+/* Exercise pre-prologue dependency to %union.  */
+typedef int semantic_value;

 
 

-extern void perror (const char *s);
+static semantic_value global_result = 0;
+static int global_count = 0;

 %}
 
 %}
 

-/* Also exercise %union. */
+/* Exercise %union. */

 %union
 {
 %union
 {

-  int ival; /* A comment to exercise an old bug. */
+  semantic_value ival;

 };
 
 };
 

+%{
+static int power (int base, int exponent);
+]AT_SKEL_CC_IF(
+[#ifndef YYLTYPE
+[#] define YYLTYPE AT_NAME_PREFIX::location
+#endif
+#define first_line   begin.line
+#define first_column begin.column
+#define last_line    end.line
+#define last_column  end.column
+],
+[/* yyerror receives the location if:
+   - %location & %pure & %glr
+   - %location & %pure & %yacc & %parse-param. */
+static void yyerror (AT_YYERROR_ARG_LOC_IF([YYLTYPE *llocp, ])
+                     AT_PARAM_IF([semantic_value *result, int *count, ])
+                     const char *s
+                     );])[
+static int yylex (]AT_LEX_FORMALS[);
+static int get_char (]AT_LEX_FORMALS[);
+static void unget_char (]AT_LEX_PRE_FORMALS[ int c);
+%}
+
+]AT_SKEL_CC_IF(
+[/* The lalr1.cc skeleton, for backward compatibility, defines
+   a constructor for position that initializes the filename.  The
+   glr.cc skeleton does not (and in fact cannot: location/position
+   are stored in a union, from which objects with constructors are
+   excluded in C++. */
+%initial-action {
+  @$.initialize (0);
+}
+])[
+

 /* Bison Declarations */
 /* Bison Declarations */

-%token CALC_EOF 0 "end of file"
+%token CALC_EOF 0 "end of input"

 %token <ival> NUM "number"
 %type  <ival> exp
 
 %token <ival> NUM "number"
 %type  <ival> exp
 


@@ -80,27 +112,25 @@ extern void perror (const char *s);
 %left NEG     /* negation--unary minus */
 %right '^'    /* exponentiation        */
 
 %left NEG     /* negation--unary minus */
 %right '^'    /* exponentiation        */
 

-]$4[
-

 /* Grammar follows */
 %%
 input:
   line
 /* Grammar follows */
 %%
 input:
   line

-| input line
+| input line         { ]AT_PARAM_IF([++*count; ++global_count;])[ }

 ;
 
 line:
   '\n'
 ;
 
 line:
   '\n'

-| exp '\n' {}
+| exp '\n'           { ]AT_PARAM_IF([*result = global_result = $1], [USE ($1)])[; }

 ;
 
 exp:
   NUM                { $$ = $1;             }
 | exp '=' exp
   {
 ;
 
 exp:
   NUM                { $$ = $1;             }
 | exp '=' exp
   {

-     if ($1 != $3)
-       fprintf (stderr, "calc: error: %d != %d\n", $1, $3);
-     $$ = $1 == $3;
+    if ($1 != $3)
+      fprintf (stderr, "calc: error: %d != %d\n", $1, $3);
+    $$ = $1;

   }
 | exp '+' exp        { $$ = $1 + $3;        }
 | exp '-' exp        { $$ = $1 - $3;        }
   }
 | exp '+' exp        { $$ = $1 + $3;        }
 | exp '-' exp        { $$ = $1 - $3;        }


@@ -109,75 +139,107 @@ exp:
 | '-' exp  %prec NEG { $$ = -$2;            }
 | exp '^' exp        { $$ = power ($1, $3); }
 | '(' exp ')'        { $$ = $2;             }
 | '-' exp  %prec NEG { $$ = -$2;            }
 | exp '^' exp        { $$ = power ($1, $3); }
 | '(' exp ')'        { $$ = $2;             }

-| '(' error ')'      { $$ = 0;              }
+| '(' error ')'      { $$ = 1111;           }
+| '!'                { $$ = 0; YYERROR;     }
+| '-' error          { $$ = 0; YYERROR;     }

 ;
 %%
 ;
 %%

-/* The input. */
-FILE *yyin;
+/* The input.  */
+static FILE *input;

 
 

-static void
-yyerror (const char *s)
+]AT_SKEL_CC_IF(
+[/* A C++ error reporting function.  */
+void
+AT_NAME_PREFIX::parser::error (const location& l, const std::string& m)
+{
+  (void) l;
+  std::cerr << AT_LOCATION_IF([l << ": " << ])m << std::endl;
+}
+
+int
+yyparse (AT_PARAM_IF([semantic_value *result, int *count]))

 {
 {

-#if YYLSP_NEEDED
-  fprintf (stderr, "%d.%d-%d.%d: ",
-          yylloc.first_line, yylloc.first_column,
-          yylloc.last_line, yylloc.last_column);
+  AT_NAME_PREFIX::parser parser[]AT_PARAM_IF([ (result, count)]);
+#if YYDEBUG
+  parser.set_debug_level (1);

 #endif
 #endif

-  fprintf (stderr, "%s\n", s);
+  return parser.parse ();

 }
 }

+],
+[static void
+yyerror (AT_YYERROR_ARG_LOC_IF([YYLTYPE *llocp, ])
+         AT_PARAM_IF([semantic_value *result, int *count, ])
+         const char *s)
+{
+AT_PARAM_IF([(void) result; (void) count;])
+AT_YYERROR_SEES_LOC_IF([
+  fprintf (stderr, "%d.%d",
+           AT_LOC.first_line, AT_LOC.first_column);
+  if (AT_LOC.first_line != AT_LOC.last_line)
+    fprintf (stderr, "-%d.%d",
+            AT_LOC.last_line,  AT_LOC.last_column - 1);
+  else if (AT_LOC.first_column != AT_LOC.last_column - 1)
+    fprintf (stderr, "-%d",
+            AT_LOC.last_column - 1);
+  fprintf (stderr, ": ");])
+  fprintf (stderr, "%s\n", s);
+}])[

 
 
 
 

-#if YYLSP_NEEDED
+]AT_LOCATION_IF([

 static YYLTYPE last_yylloc;
 static YYLTYPE last_yylloc;

-#endif
+])[

 static int
 static int

-yygetc (void)
+get_char (]AT_LEX_FORMALS[)

 {
 {

-  int res = getc (yyin);
-#if YYLSP_NEEDED
-  last_yylloc = yylloc;
+  int res = getc (input);
+  ]AT_USE_LEX_ARGS[;
+]AT_LOCATION_IF([
+  last_yylloc = AT_LOC;

   if (res == '\n')
     {
   if (res == '\n')
     {

-      yylloc.last_line++;
-      yylloc.last_column = 1;
+      AT_LOC.last_line++;
+      AT_LOC.last_column = 1;

     }
   else
     }
   else

-    yylloc.last_column++;
-#endif
+    AT_LOC.last_column++;
+])[

   return res;
 }
 
 
 static void
   return res;
 }
 
 
 static void

-yyungetc (int c)
+unget_char (]AT_LEX_PRE_FORMALS[ int c)

 {
 {

-#if YYLSP_NEEDED
+  ]AT_USE_LEX_ARGS[;
+]AT_LOCATION_IF([

   /* Wrong when C == `\n'. */
   /* Wrong when C == `\n'. */

-  yylloc = last_yylloc;
-#endif
-  ungetc (c, yyin);
+  AT_LOC = last_yylloc;
+])[
+  ungetc (c, input);

 }
 
 static int
 }
 
 static int

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

 {
 {

-  int c = yygetc ();
+  int c = get_char (]AT_LEX_ARGS[);

   int sign = 1;
   int n = 0;
 
   int sign = 1;
   int n = 0;
 

+  ]AT_USE_LEX_ARGS[;

   if (c == '-')
     {
   if (c == '-')
     {

-      c = yygetc ();
+      c = get_char (]AT_LEX_ARGS[);

       sign = -1;
     }
 
   while (isdigit (c))
     {
       n = 10 * n + (c - '0');
       sign = -1;
     }
 
   while (isdigit (c))
     {
       n = 10 * n + (c - '0');

-      c = yygetc ();
+      c = get_char (]AT_LEX_ARGS[);

     }
 
     }
 

-  yyungetc (c);
+  unget_char (]AT_LEX_PRE_ARGS[ c);

 
   return sign * n;
 }
 
   return sign * n;
 }


@@ -191,29 +253,39 @@ read_signed_integer (void)
 `---------------------------------------------------------------*/
 
 static int
 `---------------------------------------------------------------*/
 
 static int

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

 {
 {

+  static int init = 1;

   int c;
 
   int c;
 

-#if YYLSP_NEEDED
-  yylloc.first_column = yylloc.last_column;
-  yylloc.first_line = yylloc.last_line;
-#endif
+  if (init)
+    {
+      init = 0;
+]AT_LOCATION_IF([
+      AT_LOC.last_column = 1;
+      AT_LOC.last_line = 1;
+])[
+    }
+
+]AT_LOCATION_IF([
+ AT_LOC.first_column = AT_LOC.last_column;
+  AT_LOC.first_line   = AT_LOC.last_line;
+])[

 
   /* Skip white space.  */
 
   /* Skip white space.  */

-  while ((c = yygetc ()) == ' ' || c == '\t')
+  while ((c = get_char (]AT_LEX_ARGS[)) == ' ' || c == '\t')

     {
     {

-#if YYLSP_NEEDED
-      yylloc.first_column = yylloc.last_column;
-      yylloc.first_line = yylloc.last_line;
-#endif
+]AT_LOCATION_IF(
+[     AT_LOC.first_column = AT_LOC.last_column;
+      AT_LOC.first_line   = AT_LOC.last_line;
+])[

     }
 
   /* process numbers   */
   if (c == '.' || isdigit (c))
     {
     }
 
   /* process numbers   */
   if (c == '.' || isdigit (c))
     {

-      yyungetc (c);
-      yylval.ival = read_signed_integer ();
+      unget_char (]AT_LEX_PRE_ARGS[ c);
+      ]AT_VAL[.ival = read_signed_integer (]AT_LEX_ARGS[);

       return NUM;
     }
 
       return NUM;
     }
 


@@ -230,37 +302,45 @@ power (int base, int exponent)
 {
   int res = 1;
   if (exponent < 0)
 {
   int res = 1;
   if (exponent < 0)

-    exit (1);
+    exit (3);

   for (/* Niente */; exponent; --exponent)
     res *= base;
   return res;
 }
 
   for (/* Niente */; exponent; --exponent)
     res *= base;
   return res;
 }
 

+

 int
 main (int argc, const char **argv)
 {
 int
 main (int argc, const char **argv)
 {

-  yyin = NULL;
+  semantic_value result = 0;
+  int count = 0;
+  int status;
+
+  /* This used to be alarm (10), but that isn't enough time for
+     a July 1995 vintage DEC Alphastation 200 4/100 system,
+     according to Nelson H. F. Beebe.  100 seconds is enough.  */
+  alarm (100);

 
   if (argc == 2)
 
   if (argc == 2)

-    yyin = fopen (argv[1], "r");
+    input = fopen (argv[1], "r");

   else
   else

-    yyin = stdin;
+    input = stdin;

 
 

-  if (!yyin)
+  if (!input)

     {
       perror (argv[1]);
     {
       perror (argv[1]);

-      exit (1);
+      return 3;

     }
 
     }
 

-#if YYDEBUG
-  yydebug = 1;
-#endif
-#if YYLSP_NEEDED
-  yylloc.last_column = 1;
-  yylloc.last_line = 1;
-#endif
-  yyparse ();
-  return 0;
+]AT_SKEL_CC_IF([], [m4_bmatch([$4], [%debug],
+[  yydebug = 1;])])[
+  status = yyparse (]AT_PARAM_IF([[&result, &count]])[);
+  fclose (input);
+  if (global_result != result)
+    abort ();
+  if (global_count != count)
+    abort ();
+  return status;

 }
 ]])
 ])# _AT_DATA_CALC_Y
 }
 ]])
 ])# _AT_DATA_CALC_Y


@@ -270,96 +350,115 @@ main (int argc, const char **argv)
 # -------------------------------
 # Produce `calc.y'.
 m4_define([AT_DATA_CALC_Y],
 # -------------------------------
 # Produce `calc.y'.
 m4_define([AT_DATA_CALC_Y],

-[_AT_DATA_CALC_Y($[1], $[2], $[3],
-                 [m4_bmatch([$1], [--yyerror-verbose],
-                            [[%error-verbose]])])])
+[_AT_DATA_CALC_Y($[1], $[2], $[3], [$1])
+])

 
 
 
 
 
 

-# _AT_CHECK_CALC(BISON-OPTIONS, INPUT, [NUM-STDERR-LINES = 0])
-# ------------------------------------------------------------
+# _AT_CHECK_CALC(BISON-OPTIONS, INPUT, [NUM-STDERR-LINES])
+# --------------------------------------------------------

 # Run `calc' on INPUT and expect no STDOUT nor STDERR.
 #
 # Run `calc' on INPUT and expect no STDOUT nor STDERR.
 #

-# If BISON-OPTIONS contains `--debug', then NUM-STDERR-LINES is the number
-# of expected lines on stderr.
+# If BISON-OPTIONS contains `%debug' but not `%glr-parser', then
+#
+# NUM-STDERR-LINES is the number of expected lines on stderr.
+# Currently this is ignored, though, since the output format is fluctuating.
+#
+# We don't count GLR's traces yet, since its traces are somewhat
+# different from LALR's.

 m4_define([_AT_CHECK_CALC],
 [AT_DATA([[input]],
 [[$2
 ]])
 m4_define([_AT_CHECK_CALC],
 [AT_DATA([[input]],
 [[$2
 ]])

-AT_CHECK([./calc input], 0, [], [stderr])dnl
-AT_CHECK([wc -l <stderr | sed 's/[[^0-9]]//g'], 0,
-         [m4_bmatch([$1], [--debug],
-                    [$3], [0])
-])
+AT_PARSER_CHECK([./calc input], 0, [], [stderr])

 ])
 
 
 ])
 
 

-# _AT_CHECK_CALC_ERROR(BISON-OPTIONS, INPUT, [NUM-DEBUG-LINES],
-#                      [ERROR-LOCATION], [IF-YYERROR-VERBOSE])
-# ------------------------------------------------------------
-# Run `calc' on INPUT, and expect a `parse error' message.
+# _AT_CHECK_CALC_ERROR(BISON-OPTIONS, EXIT-STATUS, INPUT,
+#                      [NUM-STDERR-LINES],
+#                      [VERBOSE-AND-LOCATED-ERROR-MESSAGE])
+# ---------------------------------------------------------
+# Run `calc' on INPUT, and expect a `syntax error' message.

 #
 # If INPUT starts with a slash, it is used as absolute input file name,
 # otherwise as contents.
 #
 #
 # If INPUT starts with a slash, it is used as absolute input file name,
 # otherwise as contents.
 #

-# If BISON-OPTIONS contains `--location', then make sure the ERROR-LOCATION
+# NUM-STDERR-LINES is the number of expected lines on stderr.
+# Currently this is ignored, though, since the output format is fluctuating.
+#
+# If BISON-OPTIONS contains `%location', then make sure the ERROR-LOCATION

 # is correctly output on stderr.
 #
 # is correctly output on stderr.
 #

-# If BISON-OPTIONS contains `--yyerror-verbose', then make sure the
-# IF-YYERROR-VERBOSE message is properly output after `parse error, '
+# If BISON-OPTIONS contains `%error-verbose', then make sure the
+# IF-YYERROR-VERBOSE message is properly output after `syntax error, '

 # on STDERR.
 #
 # on STDERR.
 #

-# If BISON-OPTIONS contains `--debug', then NUM-STDERR-LINES is the number
-# of expected lines on stderr.
+# If BISON-OPTIONS contains `%debug' but not `%glr', then NUM-STDERR-LINES
+# is the number of expected lines on stderr.

 m4_define([_AT_CHECK_CALC_ERROR],
 m4_define([_AT_CHECK_CALC_ERROR],

-[m4_bmatch([$2], [^/],
-           [AT_CHECK([./calc $2], 0, [], [stderr])],
+[m4_bmatch([$3], [^/],
+           [AT_PARSER_CHECK([./calc $3], $2, [], [stderr])],

            [AT_DATA([[input]],
            [AT_DATA([[input]],

-[[$2
+[[$3

 ]])
 ]])

-AT_CHECK([./calc input], 0, [], [stderr])])
-
-m4_bmatch([$1], [--debug],
-[AT_CHECK([wc -l <stderr | sed 's/[[^0-9]]//g'], 0, [$3
-])])
+AT_PARSER_CHECK([./calc input], $2, [], [stderr])])

 
 # Normalize the observed and expected error messages, depending upon the
 # options.
 # 1. Remove the traces from observed.
 
 # Normalize the observed and expected error messages, depending upon the
 # options.
 # 1. Remove the traces from observed.

-egrep -v '^((Start|Enter|Read|Reduc|Shift)ing|state|Error:|Next|Discarding) ' stderr >at-stderr
+sed '/^Starting/d
+/^Entering/d
+/^Stack/d
+/^Reading/d
+/^Reducing/d
+/^Return/d
+/^Shifting/d
+/^state/d
+/^Cleanup:/d
+/^Error:/d
+/^Next/d
+/^Now/d
+/^Discarding/d
+/ \$[[0-9$]]* = /d
+/^yydestructor:/d' stderr >at-stderr

 mv at-stderr stderr
 # 2. Create the reference error message.
 AT_DATA([[expout]],
 mv at-stderr stderr
 # 2. Create the reference error message.
 AT_DATA([[expout]],

-[$4
+[$5

 ])
 # 3. If locations are not used, remove them.
 ])
 # 3. If locations are not used, remove them.

-m4_bmatch([$1], [--location], [],
+AT_YYERROR_SEES_LOC_IF([],

 [[sed 's/^[-0-9.]*: //' expout >at-expout
 mv at-expout expout]])
 # 4. If error-verbose is not used, strip the`, unexpected....' part.
 [[sed 's/^[-0-9.]*: //' expout >at-expout
 mv at-expout expout]])
 # 4. If error-verbose is not used, strip the`, unexpected....' part.

-m4_bmatch([$1], [--yyerror-verbose], [],
-[[sed 's/parse error, .*$/parse error/' expout >at-expout
+m4_bmatch([$1], [%error-verbose], [],
+[[sed 's/syntax error, .*$/syntax error/' expout >at-expout

 mv at-expout expout]])
 # 5. Check
 AT_CHECK([cat stderr], 0, [expout])
 ])
 
 
 mv at-expout expout]])
 # 5. Check
 AT_CHECK([cat stderr], 0, [expout])
 ])
 
 

-# AT_CHECK_CALC([BISON-OPTIONS], [PARSER-EXPECTED-STDERR])
-# --------------------------------------------------------
+# AT_CHECK_CALC([BISON-OPTIONS, [EXPECTED-TO-FAIL]])
+# --------------------------------------------------

 # Start a testing chunk which compiles `calc' grammar with
 # BISON-OPTIONS, and performs several tests over the parser.
 # Start a testing chunk which compiles `calc' grammar with
 # BISON-OPTIONS, and performs several tests over the parser.

+# However, if EXPECTED-TO-FAIL is nonempty, this test is expected to fail.

 m4_define([AT_CHECK_CALC],
 [# We use integers to avoid dependencies upon the precision of doubles.
 AT_SETUP([Calculator $1])
 
 m4_define([AT_CHECK_CALC],
 [# We use integers to avoid dependencies upon the precision of doubles.
 AT_SETUP([Calculator $1])
 

-AT_DATA_CALC_Y([$1])
+m4_ifval([$2], [AT_CHECK([exit 77])])
+
+AT_BISON_OPTION_PUSHDEFS([$1])

 
 

-# Specify the output files to avoid problems on different file systems.
-AT_CHECK([bison calc.y -o calc.c m4_bpatsubst([$1], [--yyerror-verbose])],
-         [0], [], [])
+AT_DATA_CALC_Y([$1])

 
 

-AT_CHECK([$CC $CFLAGS $CPPFLAGS calc.c -o calc], 0, [], [ignore])
+AT_SKEL_CC_IF(
+  [AT_BISON_CHECK([-o calc.cc calc.y])
+   AT_COMPILE_CXX([calc])],
+  [AT_BISON_CHECK([-o calc.c calc.y])
+   AT_COMPILE([calc])])

 
 # Test the priorities.
 _AT_CHECK_CALC([$1],
 
 # Test the priorities.
 _AT_CHECK_CALC([$1],


@@ -375,44 +474,62 @@ _AT_CHECK_CALC([$1],
 1 - (2 - 3) = 2
 
 2^2^3 = 256
 1 - (2 - 3) = 2
 
 2^2^3 = 256

-(2^2)^3 = 64], [486])
-
-# Some parse errors.
-_AT_CHECK_CALC_ERROR([$1], [0 0], [10],
-                     [1.3-1.4: parse error, unexpected "number"])
-_AT_CHECK_CALC_ERROR([$1], [1//2], [13],
-                     [1.3-1.4: parse error, unexpected '/', expecting "number" or '-' or '('])
-_AT_CHECK_CALC_ERROR([$1], [error], [4],
-                     [1.1-1.2: parse error, unexpected $undefined., expecting "number" or '-' or '\n' or '('])
-_AT_CHECK_CALC_ERROR([$1], [1 = 2 = 3], [19],
-                     [1.7-1.8: parse error, unexpected '='])
-_AT_CHECK_CALC_ERROR([$1],
+(2^2)^3 = 64],
+               [842])
+
+# Some syntax errors.
+_AT_CHECK_CALC_ERROR([$1], [1], [0 0], [15],
+                     [1.3: syntax error, unexpected number])
+_AT_CHECK_CALC_ERROR([$1], [1], [1//2], [20],
+                     [1.3: syntax error, unexpected '/', expecting number or '-' or '(' or '!'])
+_AT_CHECK_CALC_ERROR([$1], [1], [error], [5],
+                     [1.1: syntax error, unexpected $undefined])
+_AT_CHECK_CALC_ERROR([$1], [1], [1 = 2 = 3], [30],
+                     [1.7: syntax error, unexpected '='])
+_AT_CHECK_CALC_ERROR([$1], [1],

                      [
 +1],
                      [
 +1],

-                     [13],
-                     [2.1-2.2: parse error, unexpected '+'])
+                     [20],
+                     [2.1: syntax error, unexpected '+'])

 # Exercise error messages with EOF: work on an empty file.
 # Exercise error messages with EOF: work on an empty file.

-_AT_CHECK_CALC_ERROR([$1],
-                     [/dev/null],
-                     [4],
-                     [1.1-1.2: parse error, unexpected "end of file", expecting "number" or '-' or '\n' or '('])
+_AT_CHECK_CALC_ERROR([$1], [1], [/dev/null], [4],
+                     [1.1: syntax error, unexpected end of input])

 
 # Exercise the error token: without it, we die at the first error,
 
 # Exercise the error token: without it, we die at the first error,

-# hence be sure i. to have several errors, ii. to test the action
-# associated to `error'.
-_AT_CHECK_CALC_ERROR([$1],
-                     [(1 ++ 2) + (0 0) = 1],
-                     [76],
-[1.5-1.6: parse error, unexpected '+', expecting "number" or '-' or '('
-1.15-1.16: parse error, unexpected "number"
-calc: error: 0 != 1])
-
-# Add a studid example demonstrating that Bison can further improve the
-# error message.  FIXME: Fix this ridiculous message.
-_AT_CHECK_CALC_ERROR([$1],
-                     [()],
-                     [21],
-[1.2-1.3: parse error, unexpected ')', expecting error or "number" or '-' or '('])
+# hence be sure to
+#
+# - have several errors which exercise different shift/discardings
+#   - (): nothing to pop, nothing to discard
+#   - (1 + 1 + 1 +): a lot to pop, nothing to discard
+#   - (* * *): nothing to pop, a lot to discard
+#   - (1 + 2 * *): some to pop and discard
+#
+# - test the action associated to `error'
+#
+# - check the lookahead that triggers an error is not discarded
+#   when we enter error recovery.  Below, the lookahead causing the
+#   first error is ")", which is needed to recover from the error and
+#   produce the "0" that triggers the "0 != 1" error.
+#
+_AT_CHECK_CALC_ERROR([$1], [0],
+                     [() + (1 + 1 + 1 +) + (* * *) + (1 * 2 * *) = 1],
+                     [250],
+[1.2: syntax error, unexpected ')', expecting number or '-' or '(' or '!'
+1.18: syntax error, unexpected ')', expecting number or '-' or '(' or '!'
+1.23: syntax error, unexpected '*', expecting number or '-' or '(' or '!'
+1.41: syntax error, unexpected '*', expecting number or '-' or '(' or '!'
+calc: error: 4444 != 1])
+
+# The same, but this time exercising explicitly triggered syntax errors.
+# POSIX says the lookahead causing the error should not be discarded.
+_AT_CHECK_CALC_ERROR([$1], [0], [(!) + (0 0) = 1], [102],
+[1.10: syntax error, unexpected number
+calc: error: 2222 != 1])
+_AT_CHECK_CALC_ERROR([$1], [0], [(- *) + (0 0) = 1], [113],
+[1.4: syntax error, unexpected '*', expecting number or '-' or '(' or '!'
+1.12: syntax error, unexpected number
+calc: error: 2222 != 1])
+AT_BISON_OPTION_POPDEFS

 
 AT_CLEANUP
 ])# AT_CHECK_CALC
 
 AT_CLEANUP
 ])# AT_CHECK_CALC


@@ -420,22 +537,128 @@ AT_CLEANUP
 
 
 
 
 
 

-# ------------------ #
-# Test the parsers.  #
-# ------------------ #
+# ------------------------ #
+# Simple LALR Calculator.  #
+# ------------------------ #
+
+AT_BANNER([[Simple LALR(1) Calculator.]])
+
+# AT_CHECK_CALC_LALR([BISON-OPTIONS])
+# -----------------------------------
+# Start a testing chunk which compiles `calc' grammar with
+# BISON-OPTIONS, and performs several tests over the parser.
+m4_define([AT_CHECK_CALC_LALR],
+[AT_CHECK_CALC($@)])
+
+AT_CHECK_CALC_LALR()
+
+AT_CHECK_CALC_LALR([%defines])
+AT_CHECK_CALC_LALR([%locations])
+AT_CHECK_CALC_LALR([%name-prefix="calc"]) dnl test deprecated `='
+AT_CHECK_CALC_LALR([%verbose])
+AT_CHECK_CALC_LALR([%yacc])
+AT_CHECK_CALC_LALR([%error-verbose])
+
+AT_CHECK_CALC_LALR([%define api.pure %locations])
+AT_CHECK_CALC_LALR([%define api.push_pull "both" %define api.pure %locations])
+AT_CHECK_CALC_LALR([%error-verbose %locations])
+
+AT_CHECK_CALC_LALR([%error-verbose %locations %defines %name-prefix "calc" %verbose %yacc])
+
+AT_CHECK_CALC_LALR([%debug])
+AT_CHECK_CALC_LALR([%error-verbose %debug %locations %defines %name-prefix "calc" %verbose %yacc])
+
+AT_CHECK_CALC_LALR([%define api.pure %error-verbose %debug %locations %defines %name-prefix "calc" %verbose %yacc])
+AT_CHECK_CALC_LALR([%define api.push_pull "both" %define api.pure %error-verbose %debug %locations %defines %name-prefix "calc" %verbose %yacc])
+
+AT_CHECK_CALC_LALR([%define api.pure %error-verbose %debug %locations %defines %name-prefix "calc" %verbose %yacc %parse-param {semantic_value *result} %parse-param {int *count}])
+
+
+# ----------------------- #
+# Simple GLR Calculator.  #
+# ----------------------- #
+
+AT_BANNER([[Simple GLR Calculator.]])
+
+# AT_CHECK_CALC_GLR([BISON-OPTIONS])
+# ----------------------------------
+# Start a testing chunk which compiles `calc' grammar with
+# BISON-OPTIONS and %glr-parser, and performs several tests over the parser.
+m4_define([AT_CHECK_CALC_GLR],
+[AT_CHECK_CALC([%glr-parser] $@)])
+

 
 

-AT_CHECK_CALC()
+AT_CHECK_CALC_GLR()
+
+AT_CHECK_CALC_GLR([%defines])
+AT_CHECK_CALC_GLR([%locations])
+AT_CHECK_CALC_GLR([%name-prefix "calc"])
+AT_CHECK_CALC_GLR([%verbose])
+AT_CHECK_CALC_GLR([%yacc])
+AT_CHECK_CALC_GLR([%error-verbose])
+
+AT_CHECK_CALC_GLR([%define api.pure %locations])
+AT_CHECK_CALC_GLR([%error-verbose %locations])
+
+AT_CHECK_CALC_GLR([%error-verbose %locations %defines %name-prefix "calc" %verbose %yacc])
+
+AT_CHECK_CALC_GLR([%debug])
+AT_CHECK_CALC_GLR([%error-verbose %debug %locations %defines %name-prefix "calc" %verbose %yacc])
+
+AT_CHECK_CALC_GLR([%define api.pure %error-verbose %debug %locations %defines %name-prefix "calc" %verbose %yacc])
+
+AT_CHECK_CALC_GLR([%define api.pure %error-verbose %debug %locations %defines %name-prefix "calc" %verbose %yacc %parse-param {semantic_value *result} %parse-param {int *count}])
+
+
+# ----------------------------- #
+# Simple LALR1 C++ Calculator.  #
+# ----------------------------- #
+
+AT_BANNER([[Simple LALR(1) C++ Calculator.]])
+
+# First let's try using %skeleton
+AT_CHECK_CALC([%skeleton "lalr1.cc" %defines %locations])
+
+# AT_CHECK_CALC_LALR1_CC([BISON-OPTIONS])
+# ---------------------------------------
+# Start a testing chunk which compiles `calc' grammar with
+# the C++ skeleton, and performs several tests over the parser.
+m4_define([AT_CHECK_CALC_LALR1_CC],
+[AT_CHECK_CALC([%language "C++" %defines %locations] $@)])
+
+AT_CHECK_CALC_LALR1_CC([])
+AT_CHECK_CALC_LALR1_CC([%error-verbose %name-prefix "calc" %verbose %yacc])
+
+AT_CHECK_CALC_LALR1_CC([%error-verbose %debug %name-prefix "calc" %verbose %yacc])
+
+AT_CHECK_CALC_LALR1_CC([%pure-parser %error-verbose %debug %name-prefix "calc" %verbose %yacc])
+
+AT_CHECK_CALC_LALR1_CC([%pure-parser %error-verbose %debug %name-prefix "calc" %verbose %yacc %parse-param {semantic_value *result} %parse-param {int *count}])
+
+
+
+# --------------------------- #
+# Simple GLR C++ Calculator.  #
+# --------------------------- #
+
+AT_BANNER([[Simple GLR C++ Calculator.]])
+
+# Again, we try also using %skeleton.
+AT_CHECK_CALC([%skeleton "glr.cc" %defines %locations])
+
+# AT_CHECK_CALC_GLR_CC([BISON-OPTIONS])
+# -------------------------------------
+# Start a testing chunk which compiles `calc' grammar with
+# the GLR C++ skeleton, and performs several tests over the parser.
+m4_define([AT_CHECK_CALC_GLR_CC],
+[AT_CHECK_CALC([%language "C++" %glr-parser %defines %locations] $@)])

 
 

-AT_CHECK_CALC([--defines])
-AT_CHECK_CALC([--locations])
-AT_CHECK_CALC([--name-prefix=calc])
-AT_CHECK_CALC([--verbose])
-AT_CHECK_CALC([--yacc])
-AT_CHECK_CALC([--yyerror-verbose])
+AT_CHECK_CALC_GLR_CC([])
+AT_CHECK_CALC_GLR_CC([%error-verbose %name-prefix "calc" %verbose %yacc])

 
 

-AT_CHECK_CALC([--locations --yyerror-verbose])
+AT_CHECK_CALC_GLR_CC([%debug])
+AT_CHECK_CALC_GLR_CC([%error-verbose %debug %name-prefix "calc" %verbose %yacc])

 
 

-AT_CHECK_CALC([--defines --locations --name-prefix=calc --verbose --yacc --yyerror-verbose])
+AT_CHECK_CALC_GLR_CC([%pure-parser %error-verbose %debug %name-prefix "calc" %verbose %yacc])

 
 

-AT_CHECK_CALC([--debug])
-AT_CHECK_CALC([--debug --defines --locations --name-prefix=calc --verbose --yacc --yyerror-verbose])
+AT_CHECK_CALC_GLR_CC([%pure-parser %error-verbose %debug %name-prefix "calc" %verbose %yacc %parse-param {semantic_value *result} %parse-param {int *count}])