/* Tests for interactions between C++ and assert.

   Copyright (C) 2017-2018 Free Software Foundation, Inc.

   This file is part of the GNU C Library.

   The GNU C Library is free software; you can redistribute it and/or

   modify it under the terms of the GNU Lesser General Public

   License as published by the Free Software Foundation; either

   version 2.1 of the License, or (at your option) any later version.

   The GNU C Library 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

   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public

   License along with the GNU C Library; if not, see

   <http://www.gnu.org/licenses/>.  */

#include <assert.h>

/* The C++ standard requires that if the assert argument is a constant

   subexpression, then the assert itself is one, too.  */

constexpr int

check_constexpr ()

{

  return (assert (true), 1);

}

/* Objects of this class can be contextually converted to bool, but

   cannot be compared to int.  */

struct no_int

{

  no_int () = default;

  no_int (const no_int &) = delete;

  explicit operator bool () const

  {

    return true;

  }

  bool operator! () const; /* No definition.  */

  template <class T> bool operator== (T) const; /* No definition.  */

  template <class T> bool operator!= (T) const; /* No definition.  */

};

/* This class tests that operator== is not used by assert.  */

struct bool_and_int

{

  bool_and_int () = default;

  bool_and_int (const no_int &) = delete;

  explicit operator bool () const

  {

    return true;

  }

  bool operator! () const; /* No definition.  */

  template <class T> bool operator== (T) const; /* No definition.  */

  template <class T> bool operator!= (T) const; /* No definition.  */

};

static int

do_test ()

{

  {

    no_int value;

    assert (value);

  }

  {

    bool_and_int value;

    assert (value);

  }

  return 0;

}

#include <support/test-driver.c>