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[bison.git] / tests / calc.at

diff --git a/tests/calc.at b/tests/calc.at
index b226cbc92f2512ec009de6160436a1da14ef61fd..8c68dfd746183427565c402e494cdce5e98d3135 100644 (file)
--- a/tests/calc.at
+++ b/tests/calc.at
@@ -1,5 +1,5 @@
-# Checking the output filenames.                         -*- Autotest -*-
-# Copyright (C) 2000, 2001, 2002 Free Software Foundation, Inc.
+# Simple calculator.                         -*- Autotest -*-
+# Copyright (C) 2000, 2001, 2002, 2003 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


@@ -45,63 +45,42 @@ AT_DATA_GRAMMAR([calc.y],
 # include <stdlib.h>
 # include <string.h>
 #endif
 # include <stdlib.h>
 # include <string.h>
 #endif

+#if HAVE_UNISTD_H
+# include <unistd.h>
+#else
+# undef alarm
+# define alarm(seconds) /* empty */
+#endif

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

-#include <assert.h>

 
 extern void perror (const char *s);
 
 /* Exercise pre-prologue dependency to %union.  */
 
 extern void perror (const char *s);
 
 /* Exercise pre-prologue dependency to %union.  */

-typedef int value_t;
-
-value_t global_result = 0;
-int global_count = 0;
+typedef int semantic_value;

 
 

+static semantic_value global_result = 0;
+static int global_count = 0;

 %}
 
 /* Exercise %union. */
 %union
 {
 %}
 
 /* Exercise %union. */
 %union
 {

-  value_t ival;
+  semantic_value ival;

 };
 
 %{
 };
 
 %{

-#if YYPURE
-#  define LOC     (*yylloc)
-#  define VAL     (*yylval)
-#else
-#  define LOC     (yylloc)
-#  define VAL     (yylval)
-#endif
-
-#define YYLLOC_FORMAL   ]AT_LOCATION_IF([, YYLTYPE *yylloc])[
-#define YYLLOC_ARG      ]AT_LOCATION_IF([, yylloc])[
-#define USE_YYLLOC      ]AT_LOCATION_IF([(void) yylloc;])[
-
-#if YYPURE
-#  define LEX_FORMALS     YYSTYPE *yylval YYLLOC_FORMAL
-#  define LEX_ARGS        yylval          YYLLOC_ARG
-#  define USE_LEX_ARGS    (void) yylval;  USE_YYLLOC
-#  define LEX_PRE_FORMALS   LEX_FORMALS,
-#  define LEX_PRE_ARGS      LEX_ARGS,
-#else
-#  define LEX_FORMALS       void
-#  define LEX_PRE_FORMALS
-#  define LEX_ARGS
-#  define LEX_PRE_ARGS
-#  define USE_LEX_ARGS
-#endif
-

 static int power (int base, int exponent);
 static int power (int base, int exponent);

-/* yyerror receives the location if:
+]AT_LALR1_CC_IF([typedef yy::Location YYLTYPE;],
+[/* yyerror receives the location if:

    - %location & %pure & %glr
    - %location & %pure & %yacc & %parse-param. */
    - %location & %pure & %glr
    - %location & %pure & %yacc & %parse-param. */

-static void yyerror (]AT_YYERROR_ARG_LOC_IF([YYLTYPE *yylloc, ])[
-                     ]AT_PARAM_IF([value_t *result, int *count, ])[
+static void yyerror (AT_YYERROR_ARG_LOC_IF([YYLTYPE *yylloc, ])
+                     AT_PARAM_IF([semantic_value *result, int *count, ])

                      const char *s
                      const char *s

-                     );
-static int yylex (LEX_FORMALS);
-static int yygetc (LEX_FORMALS);
-static void yyungetc (LEX_PRE_FORMALS int c);
+                     );])[
+static int yylex (]AT_LEX_FORMALS[);
+static int yygetc (]AT_LEX_FORMALS[);
+static void yyungetc (]AT_LEX_PRE_FORMALS[ int c);

 %}
 
 /* Bison Declarations */
 %}
 
 /* Bison Declarations */


@@ -142,82 +121,116 @@ 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;           }
+| '!'                { YYERROR;             }
+| '-' error          { YYERROR;             }

 ;
 %%
 /* The input. */
 ;
 %%
 /* The input. */

-FILE *yyin;
+static FILE *yyin;

 
 

-static void
-yyerror (]AT_YYERROR_ARG_LOC_IF([YYLTYPE *yylloc, ])[
-         ]AT_PARAM_IF([value_t *result, int *count, ])[
-         const char *s
-         )
+]AT_LALR1_CC_IF(
+[/* Currently, print_ is required in C++. */
+void
+yy::Parser::print_ ()

 {
 {

-]AT_PARAM_IF([(void) result; (void) count; ])[
-]AT_YYERROR_SEES_LOC_IF([
-  fprintf (stderr, "%d.%d-%d.%d: ",
-          LOC.first_line, LOC.first_column,
-          LOC.last_line, LOC.last_column);
-])[
-  fprintf (stderr, "%s\n", s);
+AT_LOCATION_IF([
+  std::cerr << location;])
+}
+
+/* A C++ error reporting function. */
+void
+yy::Parser::error_ ()
+{
+  std::cerr << AT_LOCATION_IF([location << ": " << ])message << std::endl;
+}
+
+int
+yyparse (AT_PARAM_IF([semantic_value *result, int *count]))
+{
+  yy::Parser parser (!!YYDEBUG[]AT_LOCATION_IF([, yy::Location::Location ()])AT_PARAM_IF([, result, count]));
+  return parser.parse ();

 }
 }

+],
+[static void
+yyerror (AT_YYERROR_ARG_LOC_IF([YYLTYPE *yylloc, ])
+         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);
+}])[

 
 
 ]AT_LOCATION_IF([
 static YYLTYPE last_yylloc;
 ])[
 static int
 
 
 ]AT_LOCATION_IF([
 static YYLTYPE last_yylloc;
 ])[
 static int

-yygetc (LEX_FORMALS)
+yygetc (]AT_LEX_FORMALS[)

 {
   int res = getc (yyin);
 {
   int res = getc (yyin);

-  USE_LEX_ARGS;
+  ]AT_USE_LEX_ARGS[;

 ]AT_LOCATION_IF([
 ]AT_LOCATION_IF([

-  last_yylloc = LOC;
+  last_yylloc = AT_LOC;

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

-      LOC.last_line++;
-      LOC.last_column = 1;
+AT_LALR1_CC_IF(
+[     AT_LOC.end.line++;
+      AT_LOC.end.column = 0;],
+[     AT_LOC.last_line++;
+      AT_LOC.last_column = 0;])

     }
   else
     }
   else

-    LOC.last_column++;
+AT_LALR1_CC_IF(
+[    AT_LOC.end.column++;],
+[    AT_LOC.last_column++;])

 ])[
   return res;
 }
 
 
 static void
 ])[
   return res;
 }
 
 
 static void

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

 {
 {

-  USE_LEX_ARGS;
+  ]AT_USE_LEX_ARGS[;

 ]AT_LOCATION_IF([
   /* Wrong when C == `\n'. */
 ]AT_LOCATION_IF([
   /* Wrong when C == `\n'. */

-  LOC = last_yylloc;
+  AT_LOC = last_yylloc;

 ])[
   ungetc (c, yyin);
 }
 
 static int
 ])[
   ungetc (c, yyin);
 }
 
 static int

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

 {
 {

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

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

-  USE_LEX_ARGS;
+  ]AT_USE_LEX_ARGS[;

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

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

     }
 
     }
 

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

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


@@ -231,7 +244,7 @@ read_signed_integer (LEX_FORMALS)
 `---------------------------------------------------------------*/
 
 static int
 `---------------------------------------------------------------*/
 
 static int

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

 {
   static int init = 1;
   int c;
 {
   static int init = 1;
   int c;


@@ -239,31 +252,34 @@ yylex (LEX_FORMALS)
   if (init)
     {
       init = 0;
   if (init)
     {
       init = 0;

-]AT_LOCATION_IF([
-      LOC.last_column = 1;
-      LOC.last_line = 1;
-])[
+]AT_LALR1_CC_IF([],
+[AT_LOCATION_IF([
+      AT_LOC.last_column = 0;
+      AT_LOC.last_line = 1;
+])])[

     }
 
     }
 

-]AT_LOCATION_IF([
-  LOC.first_column = LOC.last_column;
-  LOC.first_line = LOC.last_line;
-])[
+]AT_LOCATION_IF([AT_LALR1_CC_IF(
+[ AT_LOC.begin = AT_LOC.end;],
+[ 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 (LEX_ARGS)) == ' ' || c == '\t')
+  while ((c = yygetc (]AT_LEX_ARGS[)) == ' ' || c == '\t')

     {
     {

-]AT_LOCATION_IF([
-      LOC.first_column = LOC.last_column;
-      LOC.first_line = LOC.last_line;
-])[
+]AT_LOCATION_IF([AT_LALR1_CC_IF(
+[     AT_LOC.begin = AT_LOC.end;],
+[     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 (LEX_PRE_ARGS c);
-      VAL.ival = read_signed_integer (LEX_ARGS);
+      yyungetc (]AT_LEX_PRE_ARGS[ c);
+      ]AT_VAL[.ival = read_signed_integer (]AT_LEX_ARGS[);

       return NUM;
     }
 
       return NUM;
     }
 


@@ -286,13 +302,15 @@ power (int base, int exponent)
   return res;
 }
 
   return res;
 }
 

+

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

-  value_t result = 0;
+  semantic_value result = 0;

   int count = 0;
   int count = 0;

-  yyin = NULL;
+  int status;

 
 

+  alarm (10);

   if (argc == 2)
     yyin = fopen (argv[1], "r");
   else
   if (argc == 2)
     yyin = fopen (argv[1], "r");
   else


@@ -304,14 +322,14 @@ main (int argc, const char **argv)
       exit (1);
     }
 
       exit (1);
     }
 

-#if YYDEBUG
-  yydebug = 1;
-#endif
-  yyparse (]AT_PARAM_IF([&result, &count])[);
-  assert (global_result == result);
-  assert (global_count  == count);
-
-  return 0;
+]AT_LALR1_CC_IF([], [m4_bmatch([$4], [%debug],
+[  yydebug = 1;])])[
+  status = yyparse (]AT_PARAM_IF([&result, &count])[);
+  if (global_result != result)
+    abort ();
+  if (global_count != count)
+    abort ();
+  return status;

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


@@ -349,10 +367,11 @@ m4_bmatch([$1],
 ])
 
 
 ])
 
 

-# _AT_CHECK_CALC_ERROR(BISON-OPTIONS, INPUT, [NUM-DEBUG-LINES],
+# _AT_CHECK_CALC_ERROR(BISON-OPTIONS, EXIT-STATUS, INPUT,
+#                      [NUM-DEBUG-LINES],

 #                      [VERBOSE-AND-LOCATED-ERROR-MESSAGE])
 #                      [VERBOSE-AND-LOCATED-ERROR-MESSAGE])

-# -------------------------------------------------------------
-# Run `calc' on INPUT, and expect a `parse 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.


@@ -361,23 +380,23 @@ m4_bmatch([$1],
 # is correctly output on stderr.
 #
 # If BISON-OPTIONS contains `%error-verbose', then make sure the
 # is correctly output on stderr.
 #
 # If BISON-OPTIONS contains `%error-verbose', then make sure the

-# IF-YYERROR-VERBOSE message is properly output after `parse error, '
+# IF-YYERROR-VERBOSE message is properly output after `syntax error, '

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

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

-[[$2
+[[$3

 ]])
 ]])

-AT_PARSER_CHECK([./calc input], 0, [], [stderr])])
+AT_PARSER_CHECK([./calc input], $2, [], [stderr])])

 m4_bmatch([$1],
   [%debug.*%glr\|%glr.*%debug],
      [],
   [%debug],
 m4_bmatch([$1],
   [%debug.*%glr\|%glr.*%debug],
      [],
   [%debug],

-     [AT_CHECK([wc -l <stderr | sed 's/[[^0-9]]//g'], 0, [$3
+     [AT_CHECK([wc -l <stderr | sed 's/[[^0-9]]//g'], 0, [$4

 ])])
 
 # Normalize the observed and expected error messages, depending upon the
 ])])
 
 # Normalize the observed and expected error messages, depending upon the


@@ -397,7 +416,7 @@ sed '/^Starting/d
 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.
 AT_YYERROR_SEES_LOC_IF([],
 ])
 # 3. If locations are not used, remove them.
 AT_YYERROR_SEES_LOC_IF([],


@@ -405,79 +424,33 @@ AT_YYERROR_SEES_LOC_IF([],
 mv at-expout expout]])
 # 4. If error-verbose is not used, strip the`, unexpected....' part.
 m4_bmatch([$1], [%error-verbose], [],
 mv at-expout expout]])
 # 4. If error-verbose is not used, strip the`, unexpected....' part.
 m4_bmatch([$1], [%error-verbose], [],

-[[sed 's/parse error, .*$/parse error/' expout >at-expout
+[[sed 's/syntax error, .*$/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_CALC_PUSHDEFS($1, $2, [BISON-OPTIONS])
-# -----------------------------------------
-# This macro works around the impossibility to define macros
-# inside macros, because issuing `[$1]' is not possible in M4 :(.
-# This sucks hard, GNU M4 should really provide M5 like $$1.
-m4_define([AT_CHECK_PUSHDEFS],
-[m4_if([$1$2], $[1]$[2], [],
-       [m4_fatal([$0: Invalid arguments: $@])])dnl
-m4_pushdef([AT_PARAM_IF],
-[m4_bmatch([$3], [%parse-param], [$1], [$2])])
-m4_pushdef([AT_LOCATION_IF],
-[m4_bmatch([$3], [%locations], [$1], [$2])])
-m4_pushdef([AT_PURE_IF],
-[m4_bmatch([$3], [%pure-parser], [$1], [$2])])
-m4_pushdef([AT_GLR_IF],
-[m4_bmatch([$3], [%glr-parser], [$1], [$2])])
-m4_pushdef([AT_PURE_AND_LOC_IF],
-[m4_bmatch([$3], [%locations.*%pure-parser\|%pure-parser.*%locations],
-           [$1], [$2])])
-m4_pushdef([AT_GLR_OR_PARAM_IF],
-[m4_bmatch([$3], [%glr-parser\|%parse-param], [$1], [$2])])
-
-# yyerror receives the location if %location & %pure & (%glr or %parse-param).
-m4_pushdef([AT_YYERROR_ARG_LOC_IF],
-[AT_GLR_OR_PARAM_IF([AT_PURE_AND_LOC_IF([$1], [$2])],
-                    [$2])])
-# yyerror cannot see the locations if !glr & pure & !param.
-m4_pushdef([AT_YYERROR_SEES_LOC_IF],
-[AT_LOCATION_IF([AT_GLR_IF([$1],
-                           [AT_PURE_IF([AT_PARAM_IF([$1], [$2])],
-                                       [$1])])],
-                [$2])])
-])
-
-
-# AT_CALC_POPDEFS
-# ---------------
-m4_define([AT_CHECK_POPDEFS],
-[m4_popdef([AT_YYERROR_SEES_LOC_IF])
-m4_popdef([AT_YYERROR_ARG_LOC_IF])
-m4_popdef([AT_GLR_OR_PARAM_IF])
-m4_popdef([AT_PURE_AND_LOC_IF])
-m4_popdef([AT_GLR_IF])
-m4_popdef([AT_LOCATION_IF])
-m4_popdef([AT_PARAM_IF])
-])
-
-
-
-# AT_CHECK_CALC([BISON-OPTIONS])
+# 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_CHECK_PUSHDEFS($[1], $[2], [$1])
+m4_ifval([$2], [AT_CHECK([exit 77])])
+
+AT_BISON_OPTION_PUSHDEFS([$1])

 
 AT_DATA_CALC_Y([$1])
 
 # Specify the output files to avoid problems on different file systems.
 
 AT_DATA_CALC_Y([$1])
 
 # Specify the output files to avoid problems on different file systems.

-AT_CHECK([bison -o calc.c calc.y],
-         [0], [], [])
+AT_CHECK([bison -o calc.c calc.y])

 
 

-AT_COMPILE([calc])
+AT_LALR1_CC_IF([AT_COMPILE_CXX([calc])],
+               [AT_COMPILE([calc])])

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


@@ -496,33 +469,59 @@ _AT_CHECK_CALC([$1],
 (2^2)^3 = 64],
                [486])
 
 (2^2)^3 = 64],
                [486])
 

-# Some parse errors.
-_AT_CHECK_CALC_ERROR([$1], [0 0], [11],
-                     [1.3-1.4: parse error, unexpected "number"])
-_AT_CHECK_CALC_ERROR([$1], [1//2], [15],
-                     [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], [22],
-                     [1.7-1.8: parse error, unexpected '='])
-_AT_CHECK_CALC_ERROR([$1],
+# Some syntax errors.
+_AT_CHECK_CALC_ERROR([$1], [1], [0 0], [11],
+                     [1.2: syntax error, unexpected "number"])
+_AT_CHECK_CALC_ERROR([$1], [1], [1//2], [15],
+                     [1.2: syntax error, unexpected '/', expecting "number" or '-' or '(' or '!'])
+_AT_CHECK_CALC_ERROR([$1], [1], [error], [4],
+                     [1.0: syntax error, unexpected $undefined])
+_AT_CHECK_CALC_ERROR([$1], [1], [1 = 2 = 3], [22],
+                     [1.6: syntax error, unexpected '='])
+_AT_CHECK_CALC_ERROR([$1], [1],

                      [
 +1],
                      [14],
                      [
 +1],
                      [14],

-                     [2.1-2.2: parse error, unexpected '+'])
+                     [2.0: 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 input", expecting "number" or '-' or '\n' or '('])
+_AT_CHECK_CALC_ERROR([$1], [1], [/dev/null], [4],
+                     [1.0: 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], [82],
-[1.5-1.6: parse error, unexpected '+', expecting "number" or '-' or '('
-1.15-1.16: parse error, unexpected "number"
-calc: error: 0 != 1])
-
-AT_CHECK_POPDEFS
+# 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],
+                     [156],
+[1.1: syntax error, unexpected ')', expecting "number" or '-' or '(' or '!'
+1.17: syntax error, unexpected ')', expecting "number" or '-' or '(' or '!'
+1.22: syntax error, unexpected '*', expecting "number" or '-' or '(' or '!'
+1.40: 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], [62],
+[1.9: syntax error, unexpected "number"
+calc: error: 2222 != 1])
+_AT_CHECK_CALC_ERROR([$1], [0], [(- *) + (0 0) = 1], [70],
+[1.3: syntax error, unexpected '*', expecting "number" or '-' or '(' or '!'
+1.11: syntax error, unexpected "number"
+calc: error: 2222 != 1])
+AT_BISON_OPTION_POPDEFS

 
 AT_CLEANUP
 ])# AT_CHECK_CALC
 
 AT_CLEANUP
 ])# AT_CHECK_CALC


@@ -552,6 +551,7 @@ AT_CHECK_CALC_LALR([%verbose])
 AT_CHECK_CALC_LALR([%yacc])
 AT_CHECK_CALC_LALR([%error-verbose])
 
 AT_CHECK_CALC_LALR([%yacc])
 AT_CHECK_CALC_LALR([%error-verbose])
 

+AT_CHECK_CALC_LALR([%pure-parser %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([%error-verbose %locations])
 
 AT_CHECK_CALC_LALR([%error-verbose %locations %defines %name-prefix="calc" %verbose %yacc])


@@ -561,7 +561,7 @@ AT_CHECK_CALC_LALR([%error-verbose %debug %locations %defines %name-prefix="calc
 
 AT_CHECK_CALC_LALR([%pure-parser %error-verbose %debug %locations %defines %name-prefix="calc" %verbose %yacc])
 
 
 AT_CHECK_CALC_LALR([%pure-parser %error-verbose %debug %locations %defines %name-prefix="calc" %verbose %yacc])
 

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

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


@@ -587,6 +587,7 @@ AT_CHECK_CALC_GLR([%verbose])
 AT_CHECK_CALC_GLR([%yacc])
 AT_CHECK_CALC_GLR([%error-verbose])
 
 AT_CHECK_CALC_GLR([%yacc])
 AT_CHECK_CALC_GLR([%error-verbose])
 

+AT_CHECK_CALC_GLR([%pure-parser %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([%error-verbose %locations])
 
 AT_CHECK_CALC_GLR([%error-verbose %locations %defines %name-prefix="calc" %verbose %yacc])


@@ -596,4 +597,41 @@ AT_CHECK_CALC_GLR([%error-verbose %debug %locations %defines %name-prefix="calc"
 
 AT_CHECK_CALC_GLR([%pure-parser %error-verbose %debug %locations %defines %name-prefix="calc" %verbose %yacc])
 
 
 AT_CHECK_CALC_GLR([%pure-parser %error-verbose %debug %locations %defines %name-prefix="calc" %verbose %yacc])
 

-AT_CHECK_CALC_GLR([%pure-parser %error-verbose %debug %locations %defines %name-prefix="calc" %verbose %yacc %parse-param "value_t *result", "result" %parse-param "int *count", "count"])
+AT_CHECK_CALC_GLR([%pure-parser %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 LALR1 C++ Calculator.]])
+
+# 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([%skeleton "lalr1.cc"] $@, [expected to fail])])
+
+# AT_CHECK_CALC_LALR1_CC()
+
+AT_CHECK_CALC_LALR1_CC([%defines %locations])
+
+AT_CHECK_CALC_LALR1_CC([%defines])
+# AT_CHECK_CALC_LALR1_CC([%locations])
+# AT_CHECK_CALC_LALR1_CC([%name-prefix="calc"])
+# AT_CHECK_CALC_LALR1_CC([%verbose])
+# AT_CHECK_CALC_LALR1_CC([%yacc])
+# AT_CHECK_CALC_LALR1_CC([%error-verbose])
+
+# AT_CHECK_CALC_LALR1_CC([%pure-parser %locations])
+# AT_CHECK_CALC_LALR1_CC([%error-verbose %locations])
+
+AT_CHECK_CALC_LALR1_CC([%error-verbose %locations %defines %name-prefix="calc" %verbose %yacc])
+
+# AT_CHECK_CALC_LALR1_CC([%debug])
+AT_CHECK_CALC_LALR1_CC([%error-verbose %debug %locations %defines %name-prefix="calc" %verbose %yacc])
+
+AT_CHECK_CALC_LALR1_CC([%pure-parser %error-verbose %debug %locations %defines %name-prefix="calc" %verbose %yacc])
+
+AT_CHECK_CALC_LALR1_CC([%pure-parser %error-verbose %debug %locations %defines %name-prefix="calc" %verbose %yacc %parse-param {semantic_value *result} %parse-param {int *count}])