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				/* Test for constant expressions: details of what is a null pointer				   constant.				*/				/* Origin: Joseph Myers  */				/* { dg-do compile } */				/* { dg-options "-std=iso9899:1990" } */				/* Note: not using -pedantic since the -std option alone should be enough				   to give the correct behavior to conforming programs.  If -pedantic is				   needed to make (say) (0, 0) not be a constant expression, this is a				   bug.				*/								int *a;				int b;				long *c;								#ifdef _LP64				#define ZERO 0L				#else				#define ZERO 0				#endif								/* Assertion that n is a null pointer constant: so the conditional expression				   has type 'int *' instead of 'void *'.				*/				#define ASSERT_NPC(n)	(b = *(1 ? a : (n)))				/* Assertion that n is not a null pointer constant: so the conditional				   expressions has type 'void *' instead of 'int *'.				*/				#define ASSERT_NOT_NPC(n)	(c = (1 ? a : (n)))								void				foo (void)				{				  ASSERT_NPC (0);				  ASSERT_NPC ((void *)0);				  ASSERT_NOT_NPC ((void *)(void *)0); /* { dg-bogus "incompatible" "bogus null pointer constant" { xfail *-*-* } } */				  ASSERT_NOT_NPC ((void *)(char *)0); /* { dg-bogus "incompatible" "bogus null pointer constant" { xfail *-*-* } } */				  ASSERT_NOT_NPC ((void *)(0, ZERO)); /* { dg-bogus "incompatible" "bogus null pointer constant" } */				  ASSERT_NOT_NPC ((void *)(&"Foobar"[0] - &"Foobar"[0])); /* { dg-bogus "incompatible" "bogus null pointer constant" { xfail *-*-* } } */				  /* This last one is a null pointer constant in C99 only.  */				  ASSERT_NOT_NPC ((void *)(1 ? 0 : (0, 0))); /* { dg-bogus "incompatible" "bogus null pointer constant" { xfail *-*-* } } */				}							

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