gcc_init_compound_literal.c revision 1.2 
1/*	$NetBSD: gcc_init_compound_literal.c,v 1.2 2021/04/17 20:57:18 rillig Exp $	*/
2# 3 "gcc_init_compound_literal.c"
3
4/*
5 * C99 says in 6.7.8p4:
6 *
7 *	All the expressions in an initializer for an object that has static
8 *	storage duration shall be constant expressions or string literals.
9 *
10 * The term "constant expression" is defined in C99 6.6, where 6.6p9 allows
11 * "constant expressions" in initializers to also be an "address constant".
12 * Using these address constants, it is possible to reference an unnamed
13 * object created by a compound literal (C99 6.5.2.5), using either an
14 * explicit '&' or the implicit array-to-pointer conversion from C99 6.3.2.1.
15 */
16
17// Seen in sys/crypto/aes/aes_ccm.c.
18const struct {
19    const unsigned char *ctxt;
20} T = {
21	(void *)0,
22	(void *)0,	/* expect: too many struct/union initializers */
23// FIXME: lint: assertion "sym->s_scl == EXTERN || sym->s_scl == STATIC" failed
24//	.ctxt = (const unsigned char[4]){
25//	    1, 2, 3, 4
26//	},
27};
28
29struct node {
30	int num;
31	struct node *left;
32	struct node *right;
33};
34
35/*
36 * Initial tree for representing the decisions in the classic number guessing
37 * game often used in teaching the basics of programming.
38 */
39/* TODO: activate after fixing the assertion failure
40static const struct node guess = {
41	50,
42	&(struct node){
43		25,
44		&(struct node){
45			12,
46			(void *)0,
47			(void *)0,
48		},
49		&(struct node){
50			37,
51			(void *)0,
52			(void *)0,
53		},
54	},
55	(void *)0
56};
57*/
58