(Actions after errors): New test case.

[bison.git] / tests / actions.at

# Executing Actions.                               -*- Autotest -*-
# Copyright 2001 Free Software Foundation, Inc.

# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2, or (at your option)
# any later version.

# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.

# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
# 02111-1307, USA.

AT_BANNER([[User Actions.]])

## ------------------ ##
## Mid-rule actions.  ##
## ------------------ ##

AT_SETUP([Mid-rule actions])

# Bison once forgot the mid-rule actions.  It was because the action
# was attached to the host rule (the one with the mid-rule action),
# instead of being attached to the empty rule dedicated to this
# action.

AT_DATA_GRAMMAR([[input.y]],
[[%{
# 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'); }
     '1' { putchar ('1'); }
     '2' { putchar ('2'); }
     '3' { putchar ('3'); }
     '4' { putchar ('4'); }
     '5' { putchar ('5'); }
     '6' { putchar ('6'); }
     '7' { putchar ('7'); }
     '8' { putchar ('8'); }
     '9' { putchar ('9'); }
         { putchar ('\n'); }
   ;
%%
static int
yylex (void)
{
  static const char *input = "123456789";
  return *input++;
}

static void
yyerror (const char *msg)
{
  fprintf (stderr, "%s\n", msg);
}

int
main (void)
{
  return yyparse ();
}
]])

AT_CHECK([bison -d -v -o input.c input.y])
AT_COMPILE([input])
AT_PARSER_CHECK([./input], 0,
[[0123456789
]])

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



## ---------------- ##
## Exotic Dollars.  ##
## ---------------- ##

AT_SETUP([Exotic Dollars])

AT_DATA_GRAMMAR([[input.y]],
[[%{
# include <stdio.h>
# include <stdlib.h>
  static void yyerror (const char *msg);
  static int yylex (void);
# define YYDEBUG         1
# define YYERROR_VERBOSE 1
%}

%union
{
  int val;
};

%type <val> a_1 a_2 a_5
            sum_of_the_five_previous_values

%%
exp: a_1 a_2 { $<val>$ = 3; } { $<val>$ = $<val>3 + 1; } a_5
     sum_of_the_five_previous_values
    {
       printf ("%d\n", $6);
    }
;
a_1: { $$ = 1; };
a_2: { $$ = 2; };
a_5: { $$ = 5; };

sum_of_the_five_previous_values:
    {
       $$ = $<val>0 + $<val>-1 + $<val>-2 + $<val>-3 + $<val>-4;
    }
;

%%
static int
yylex (void)
{
  return EOF;
}

static void
yyerror (const char *msg)
{
  fprintf (stderr, "%s\n", msg);
}

int
main (void)
{
  return yyparse ();
}
]])

AT_CHECK([bison -d -v -o input.c input.y])
AT_COMPILE([input])
AT_PARSER_CHECK([./input], 0,
[[15
]])

AT_CLEANUP



## -------------------------- ##
## Printers and Destructors.  ##
## -------------------------- ##

# _AT_CHECK_PRINTER_AND_DESTRUCTOR($1, $2, $3, BISON-DIRECTIVE)
# -------------------------------------------------------------
m4_define([_AT_CHECK_PRINTER_AND_DESTRUCTOR],
[m4_if([$1$2$3], $[1]$[2]$[3], [],
       [m4_fatal([$0: Invalid arguments: $@])])dnl

AT_SETUP([Printers and Destructors: $4])

# Make sure complex $n work.

AT_DATA_GRAMMAR([[input.y]],
[[$4
%{
#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
{
  int ival;
}
%type <ival> 'x' thing line input

%printer { fprintf (yyout, "%d@%d", $$, @$.first_line); }
   input line thing 'x'

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

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

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

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

%%
input:
  /* Nothing. */
    {
      $$ = 0;
      printf ("input(%d@%d): /* Nothing */';'\n", $$, @$.first_line);
    }
| 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);
    }
;

line:
  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);
    }
| thing thing ';'
    {
      $$ = $1;
      printf ("line(%d@%d): thing(%d@%d) thing(%d@%d) ';'\n",
              $$, @$.first_line, $1, @1.first_line, $2, @2.first_line);
    }
| thing ';'
    {
      $$ = $1;
      printf ("line(%d@%d): thing(%d@%d) ';'\n",
              $$, @$.first_line, $1, @1.first_line);
    }
| error ';'
    {
      $$ = -1;
      printf ("line(%d@%d): error(@%d) ';'\n",
              $$, @$.first_line, @1.first_line);
    }
;

thing:
  'x'
    {
      $$ = $1;
      printf ("thing(%d@%d): 'x'(%d@%d)\n",
              $$, @$.first_line, $1, @1.first_line);
    }
;
%%
static int
yylex (void)
{
  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;

  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++];
    }
  else
    {
      printf ("sending: EOF\n");
      return EOF;
    }
}

static void
yyerror (const char *msg)
{
  fprintf (stdout, "%d: %s\n", yylloc.first_line, msg);
}

int
main (void)
{
  yydebug = !!getenv ("YYDEBUG");
  if (yyparse ())
    {
      fprintf (stdout, "Parsing FAILED.\n");
      exit (1);
    }
  fprintf (stdout, "Successful parse.\n");
  return 0;
}
]])

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)
Parsing FAILED.
]])

AT_CLEANUP
])


# AT_CHECK_PRINTER_AND_DESTRUCTOR([BISON-OPTIONS])
# ------------------------------------------------
# Produce `calc.y'.
m4_define([AT_CHECK_PRINTER_AND_DESTRUCTOR],
[_AT_CHECK_PRINTER_AND_DESTRUCTOR($[1], $[2], $[3], [$1])
])


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