Mercurial > hg > CbC > CbC_gcc

comparison gcc/testsuite/gcc.dg/c90-const-expr-2.c @ 111:04ced10e8804

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
gcc 7
author kono
date Fri, 27 Oct 2017 22:46:09 +0900
parents
children
comparison
equal deleted inserted replaced
68:561a7518be6b 111:04ced10e8804
1 /* Test for constant expressions: details of what is a null pointer
2 constant.
3 */
4 /* Origin: Joseph Myers <jsm28@cam.ac.uk> */
5 /* { dg-do compile } */
6 /* { dg-options "-std=iso9899:1990" } */
7 /* Note: not using -pedantic since the -std option alone should be enough
8 to give the correct behavior to conforming programs. If -pedantic is
9 needed to make (say) (0, 0) not be a constant expression, this is a
10 bug.
11 */
12
13 int *a;
14 int b;
15 long *c;
16
17 #if defined(_LP64)
18 #define ZERO 0L
19 #elif defined(_WIN64)
20 #define ZERO 0LL
21 #else
22 #define ZERO 0
23 #endif
24
25 /* Assertion that n is a null pointer constant: so the conditional expression
26 has type 'int *' instead of 'void *'.
27 */
28 #define ASSERT_NPC(n) (b = *(1 ? a : (n)))
29 /* Assertion that n is not a null pointer constant: so the conditional
30 expressions has type 'void *' instead of 'int *'.
31 */
32 #define ASSERT_NOT_NPC(n) (c = (1 ? a : (n)))
33
34 void
35 foo (void)
36 {
37 ASSERT_NPC (0);
38 ASSERT_NPC ((void *)0);
39 ASSERT_NOT_NPC ((void *)(void *)0); /* { dg-bogus "incompatible" "bogus null pointer constant" } */
40 ASSERT_NOT_NPC ((void *)(char *)0); /* { dg-bogus "incompatible" "bogus null pointer constant" } */
41 ASSERT_NOT_NPC ((void *)(0, ZERO)); /* { dg-bogus "incompatible" "bogus null pointer constant" } */
42 ASSERT_NOT_NPC ((void *)(&"Foobar"[0] - &"Foobar"[0])); /* { dg-bogus "incompatible" "bogus null pointer constant" } */
43 /* This last one is a null pointer constant in C99 only. */
44 ASSERT_NOT_NPC ((void *)(1 ? ZERO : (0, ZERO))); /* { dg-bogus "incompatible" "bogus null pointer constant" } */
45 }