/* Test the "ignore-value" module.

   Copyright (C) 2011-2018 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 <https://www.gnu.org/licenses/>.  */

/* Written by Eric Blake.  */

#include <config.h>

#include "ignore-value.h"

#include <stdio.h>

#ifndef _GL_ATTRIBUTE_RETURN_CHECK

# if __GNUC__ < 3 || (__GNUC__ == 3 && __GNUC_MINOR__ < 4)

#  define _GL_ATTRIBUTE_RETURN_CHECK

# else

#  define _GL_ATTRIBUTE_RETURN_CHECK __attribute__((__warn_unused_result__))

# endif

#endif

struct s { int i; };

static char doChar (void) _GL_ATTRIBUTE_RETURN_CHECK;

static int doInt (void) _GL_ATTRIBUTE_RETURN_CHECK;

static off_t doOff (void) _GL_ATTRIBUTE_RETURN_CHECK;

static void *doPtr (void) _GL_ATTRIBUTE_RETURN_CHECK;

static struct s doStruct (void) _GL_ATTRIBUTE_RETURN_CHECK;

static char

doChar (void)

{

  return 0;

}

static int

doInt (void)

{

  return 0;

}

static off_t

doOff (void)

{

  return 0;

}

static void *

doPtr (void)

{

  return NULL;

}

static struct s

doStruct (void)

{

  static struct s s1;

  return s1;

}

int

main (void)

{

  /* If this test can compile with -Werror and the same warnings as

     the rest of the project, then we are properly silencing warnings

     about ignored return values.  */

  ignore_value (doChar ());

  ignore_value (doInt ());

  ignore_value (doOff ());

  ignore_value (doPtr ());

  ignore_value (doStruct ());

  return 0;

}