init.c revision 1.11 
1/*	$NetBSD: init.c,v 1.11 2022/06/11 11:52:13 rillig Exp $	*/
2# 3 "init.c"
3
4/*
5 * Tests for initialization.
6 *
7 * C99 6.7.8
8 */
9
10/*
11 * C99 does not allow empty initializer braces syntactically.
12 * Lint allows this syntactically, it just complains if the resulting
13 * object is empty.
14 */
15/* expect+1: error: empty array declaration: empty_array_with_initializer [190] */
16double empty_array_with_initializer[] = {};
17double array_with_empty_initializer[3] = {};
18
19/*
20 * C99 does not allow empty initializer braces syntactically.
21 */
22struct {
23	int member;
24} empty_struct_initializer = {};
25
26
27typedef struct {
28	const char *key;
29	int n;
30} histogram_entry;
31
32/*
33 * The C standards allow omitting braces around the structural levels.  For
34 * human readers, it is usually clearer to include them.
35 *
36 * Seen in external/ibm-public/postfix/dist/src/util/dict.c(624).
37 *
38 * TODO: Properly handle this situation; as of init.c 1.215 from 2021-12-17,
39 *  the below initialization sets in->in_err but shouldn't.
40 */
41const histogram_entry hgr[] = {
42	"odd", 5,
43	"even", 5,
44};
45
46
47/*
48 * Initialization with fewer braces than usual, must still be accepted.
49 *
50 * TODO: Properly handle this situation; as of init.c 1.215 from 2021-12-17,
51 *  the below initialization sets in->in_err but shouldn't.
52 */
53struct {
54	int x, y;
55} points[] = {
56	0, 0, 3, 0, 0, 4, 3, 4
57};
58
59
60/*
61 * Initialization with fewer braces than usual, must still be accepted.
62 *
63 * TODO: Properly handle this situation; as of init.c 1.215 from 2021-12-17,
64 *  the below initialization sets in->in_err but shouldn't.
65 */
66void do_nothing(void);
67
68struct {
69	void (*action_1) (void);
70	void (*action_2) (void);
71} actions[1] = {
72	do_nothing,
73	do_nothing,
74};
75
76
77/* expect+1: error: initialization of incomplete type 'incomplete struct incomplete_struct' [175] */
78struct incomplete_struct s1 = {
79	1,
80/* expect+1: error: 's1' has incomplete type 'incomplete struct incomplete_struct' [31] */
81};
82
83/* expect+1: error: initialization of incomplete type 'incomplete struct incomplete_struct' [175] */
84struct incomplete_struct s2 = {
85	.member = 1,
86/* expect+1: error: 's2' has incomplete type 'incomplete struct incomplete_struct' [31] */
87};
88
89struct incomplete_struct {
90	int num;
91};
92
93
94/* expect+1: error: initialization of incomplete type 'incomplete union incomplete_union' [175] */
95union incomplete_union u1 = {
96	1,
97/* expect+1: error: 'u1' has incomplete type 'incomplete union incomplete_union' [31] */
98};
99
100/* expect+1: error: initialization of incomplete type 'incomplete union incomplete_union' [175] */
101union incomplete_union u2 = {
102	.member = 1,
103/* expect+1: error: 'u2' has incomplete type 'incomplete union incomplete_union' [31] */
104};
105
106union incomplete_union {
107	int num;
108};
109
110
111/* expect+1: warning: cannot initialize extern declaration: extern_var [26] */
112extern int extern_var = 1;
113int defined_var = 1;
114/* expect+1: warning: static variable 'static_var' unused [226] */
115static int static_var = 1;
116/* expect+1: error: illegal storage class [8] */
117register int register_var = 1;
118/* expect+1: error: cannot initialize typedef: typedef_var [25] */
119typedef int typedef_var = 1;
120
121
122/*
123 * In an array of unknown size that is declared using fewer braces than
124 * recommended, ensure that the array size is updated at the end of the
125 * initializer.
126 */
127struct {
128	int x;
129	int y;
130} points_of_unknown_size[] = {
131	3, 4,
132};
133