1  /* Test operation of -Wparentheses.  Warnings for assignments used as
       2     truth-values.  */
       3  /* Origin: Joseph Myers <jsm@polyomino.org.uk> */
       4  
       5  /* { dg-do compile } */
       6  /* { dg-options "-Wparentheses -std=gnu99" } */
       7  
       8  int foo (int);
       9  
      10  int a, b, c;
      11  _Bool d;
      12  
      13  int
      14  bar (void)
      15  {
      16    if (a = b) /* { dg-warning "assignment" "correct warning" } */
      17      foo (0);
      18    if ((a = b))
      19      foo (1);
      20    if (a = a) /* { dg-warning "assignment" "correct warning" } */
      21      foo (2);
      22    if ((a = a))
      23      foo (3);
      24    if (b = c) /* { dg-warning "assignment" "correct warning" } */
      25      foo (4);
      26    else
      27      foo (5);
      28    if ((b = c))
      29      foo (6);
      30    else
      31      foo (7);
      32    if (b = b) /* { dg-warning "assignment" "correct warning" } */
      33      foo (8);
      34    else
      35      foo (9);
      36    if ((b = b))
      37      foo (10);
      38    else
      39      foo (11);
      40    while (c = b) /* { dg-warning "assignment" "correct warning" } */
      41      foo (12);
      42    while ((c = b))
      43      foo (13);
      44    while (c = c) /* { dg-warning "assignment" "correct warning" } */
      45      foo (14);
      46    while ((c = c))
      47      foo (15);
      48    do foo (16); while (a = b); /* { dg-warning "assignment" "correct warning" } */
      49    do foo (17); while ((a = b));
      50    do foo (18); while (a = a); /* { dg-warning "assignment" "correct warning" } */
      51    do foo (19); while ((a = a));
      52    for (;c = b;) /* { dg-warning "assignment" "correct warning" } */
      53      foo (20);
      54    for (;(c = b);)
      55      foo (21);
      56    for (;c = c;) /* { dg-warning "assignment" "correct warning" } */
      57      foo (22);
      58    for (;(c = c);)
      59      foo (23);
      60    d = a = b; /* { dg-warning "assignment" "correct warning" } */
      61    foo (24);
      62    d = (a = b);
      63    foo (25);
      64    d = a = a; /* { dg-warning "assignment" "correct warning" } */
      65    foo (26);
      66    d = (a = a);
      67    foo (27);
      68  }