// Test operation of -Wparentheses.  Warnings for assignments used as// truth-values shouldn't apply other than for plain assignment.// Essentially the same as gcc.dg/Wparentheses-10.c.// Origin: Joseph Myers <jsm@polyomino.org.uk>// { dg-do compile }// { dg-options "-Wparentheses" }int foo (int);int a, b, c;bool d;voidbar (void){  if (a += b)    foo (0);  if (a -= a)    foo (1);  if (b *= c)    foo (2);  else    foo (3);  if (b /= b)    foo (4);  else    foo (5);  while (c %= b)    foo (6);  while (c <<= c)    foo (7);  do foo (8); while (a >>= b);  do foo (9); while (a &= a);  for (;c ^= b;)    foo (10);  for (;c |= c;)    foo (11);  d = a += b;  foo (12);  d = a -= a;  foo (13);}