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// { dg-do compile }

// { dg-options "-Wparentheses" }

// Warnings for assignments used as truth-values when using classes.

// Like Wparentheses-1.C, but with a class.

int foo (int);

class C

{

 public:

  C()

    : b(0)

  { }

  // Use default assignment constructor.

  // Provide conversion to bool so that an instance of this class will

  // work as a condition.

  operator bool() const

  { return b != 0; }

 private:

  int b;

};

C a, b, c;

bool d;

void

bar (void)

{

  if (a = b) // { dg-warning "assignment" "correct warning" }

    foo (0);

  if ((a = b))

    foo (1);

  if (a = a) // { dg-warning "assignment" "correct warning" }

    foo (2);

  if ((a = a))

    foo (3);

  if (b = c) // { dg-warning "assignment" "correct warning" }

    foo (4);

  else

    foo (5);

  if ((b = c))

    foo (6);

  else

    foo (7);

  if (b = b) // { dg-warning "assignment" "correct warning" }

    foo (8);

  else

    foo (9);

  if ((b = b))

    foo (10);

  else

    foo (11);

  while (c = b) // { dg-warning "assignment" "correct warning" }

    foo (12);

  while ((c = b))

    foo (13);

  while (c = c) // { dg-warning "assignment" "correct warning" }

    foo (14);

  while ((c = c))

    foo (15);

  do foo (16); while (a = b); // { dg-warning "assignment" "correct warning" }

  do foo (17); while ((a = b));

  do foo (18); while (a = a); // { dg-warning "assignment" "correct warning" }

  do foo (19); while ((a = a));

  for (;c = b;) // { dg-warning "assignment" "correct warning" }

    foo (20);

  for (;(c = b);)

    foo (21);

  for (;c = c;) // { dg-warning "assignment" "correct warning" }

    foo (22);

  for (;(c = c);)

    foo (23);

  d = a = b; // { dg-warning "assignment" "correct warning" }

  foo (24);

  d = (a = b);

  foo (25);

  d = a = a; // { dg-warning "assignment" "correct warning" }

  foo (26);

  d = (a = a);

  foo (27);

  if (C(a))

    foo (28);

}

bool

bar1 (void)

{

  return a = b; // { dg-warning "assignment" "correct warning" }

}

bool

bar2 (void)

{

  return (a = b);

}

bool

bar3 (void)

{

  return a = a; // { dg-warning "assignment" "correct warning" }

}

bool

bar4 (void)

{

  return (a = a);

}