build: flex.m4: check for Flex.

[bison.git] / tests / push.at

# Checking Push Parsing.                            -*- Autotest -*-

# Copyright (C) 2007, 2009-2012 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.
#
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.

AT_BANNER([[Push Parsing Tests]])

## -------------------------------- ##
## Memory Leak for Early Deletion.  ##
## -------------------------------- ##

AT_SETUP([[Memory Leak for Early Deletion]])

# Requires Valgrind.

AT_DATA_GRAMMAR([[input.y]],
[[
%{
  #include <assert.h>
  #include <stdio.h>
  #define YYINITDEPTH 1
  void yyerror (char const *msg);
%}

%define api.pure %define api.push-pull push

%%

start: 'a' 'b' 'c' ;

%%

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

int
main (void)
{
  yypstate *ps;

  /* Make sure we don't try to free ps->yyss in this case.  */
  ps = yypstate_new ();
  yypstate_delete (ps);

  /* yypstate_delete used to leak ps->yyss if the stack was reallocated but the
     parse did not return on success, syntax error, or memory exhaustion.  */
  ps = yypstate_new ();
  assert (yypush_parse (ps, 'a', YY_NULL) == YYPUSH_MORE);
  yypstate_delete (ps);

  ps = yypstate_new ();
  assert (yypush_parse (ps, 'a', YY_NULL) == YYPUSH_MORE);
  assert (yypush_parse (ps, 'b', YY_NULL) == YYPUSH_MORE);
  yypstate_delete (ps);

  return 0;
}
]])

AT_BISON_CHECK([[-o input.c input.y]])
AT_COMPILE([[input]])
AT_PARSER_CHECK([[./input]])

AT_CLEANUP

## --------------------------- ##
## Multiple impure instances.  ##
## --------------------------- ##

AT_SETUP([[Multiple impure instances]])

m4_pushdef([AT_MULTIPLE_IMPURE_INSTANCES_CHECK], [
AT_DATA_GRAMMAR([[input.y]],
[[
%{
  #include <assert.h>
  #include <stdio.h>
  void yyerror (char const *msg);
  int yylex (void);
%}

%define api.push-pull ]$1[

%%

start: ;

%%

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

int
yylex (void)
{
  return 0;
}

int
main (void)
{
  yypstate *ps;
  int i;

  for (i = 0; i < 2; ++i)
    {
      ps = yypstate_new ();
      assert (ps);
      assert (yypstate_new () == YY_NULL);
      ]m4_if([$1], [[both]], [[assert (yyparse () == 2)]])[;
      yychar = 0;
      assert (yypush_parse (ps) == 0);
      assert (yypstate_new () == YY_NULL);
      ]m4_if([$1], [[both]], [[assert (yyparse () == 2)]])[;
      yypstate_delete (ps);
    }

  return 0;
}
]])

AT_BISON_CHECK([[-o input.c input.y]])
AT_COMPILE([[input]])
AT_PARSER_CHECK([[./input]])
])

AT_MULTIPLE_IMPURE_INSTANCES_CHECK([[both]])
AT_MULTIPLE_IMPURE_INSTANCES_CHECK([[push]])

m4_popdef([AT_MULTIPLE_IMPURE_INSTANCES_CHECK])

AT_CLEANUP

## ----------------------- ##
## Unsupported Skeletons.  ##
## ----------------------- ##

AT_SETUP([[Unsupported Skeletons]])

AT_DATA([[input.y]],
[[%glr-parser
%define api.push-pull push
%%
start: ;
]])

AT_BISON_CHECK([[input.y]], [[1]], [],
[[input.y:2.9-21: %define variable 'api.push-pull' is not used
]])

AT_CLEANUP