msg_204.c revision 1.6 
1/*	$NetBSD: msg_204.c,v 1.6 2021/04/05 01:35:34 rillig Exp $	*/
2# 3 "msg_204.c"
3
4// Test for message: controlling expressions must have scalar type [204]
5
6extern void
7extern_function(void);
8
9void (*function_pointer)(void);
10
11/*
12 * Since func.c 1.39 from 2020-12-31 18:51:28, lint had produced an error
13 * when a controlling expression was a function.  Pointers to functions were
14 * ok though.
15 */
16void
17bug_between_2020_12_31_and_2021_01_08(void)
18{
19	if (extern_function)
20		extern_function();
21
22	/*
23	 * FIXME: For some reason, the ampersand is discarded in
24	 *  build_address.  This only has a visible effect if the
25	 *  t_spec in check_controlling_expression is evaluated too early,
26	 *  as has been the case before func.c 1.52 from 2021-01-08.
27	 */
28	if (&extern_function)
29		extern_function();
30
31	/* This one has always been ok since pointers are scalar types. */
32	if (function_pointer)
33		function_pointer();
34}
35
36struct s {
37	int member;
38};
39
40union u {
41	int member;
42};
43
44enum e {
45	E
46};
47
48struct arr {
49	int arr[4];
50};
51
52/* C99 6.2.5p2 */
53void if_Bool(_Bool b)			{ if (b) return; }
54
55/* C99 6.2.5p3 */
56void if_char(char c)			{ if (c) return; }
57
58/* C99 6.2.5p4 */
59void if_signed_char(signed char sc)	{ if (sc) return; }
60void if_short_int(short s)		{ if (s) return; }
61void if_int(int i)			{ if (i) return; }
62void if_long_int(long int l)		{ if (l) return; }
63void if_long_long_int(long long int ll)	{ if (ll) return; }
64
65/* C99 6.2.5p6 */
66void if_unsigned_char(unsigned char uc)			{ if (uc) return; }
67void if_unsigned_short_int(unsigned short us)		{ if (us) return; }
68void if_unsigned_int(unsigned int ui)			{ if (ui) return; }
69void if_unsigned_long_int(unsigned long int ul)		{ if (ul) return; }
70void if_unsigned_long_long_int(unsigned long long int ull) { if (ull) return; }
71
72/* C99 6.2.5p10 */
73void if_float(float f)			{ if (f) return; }
74void if_double(double d)		{ if (d) return; }
75void if_long_double(long double ld)	{ if (ld) return; }
76
77/* C99 6.2.5p11 */
78void if_float_Complex(float _Complex fc)		{ if (fc) return; }
79void if_double_Complex(double _Complex dc)		{ if (dc) return; }
80void if_long_double_Complex(long double _Complex ldc)	{ if (ldc) return; }
81
82/* C99 6.2.5p16 */
83void if_enum(enum e e)			{ if (e) return; }
84
85/* C99 6.2.5p20 */
86void if_array(struct arr arr)		{ if (arr.arr) return; }
87void if_struct(struct s s)		{ if (s) return; }	/* expect: 204 *//* expect: 231 */
88void if_union(union u u)		{ if (u) return; }	/* expect: 204 *//* expect: 231 */
89void if_function(void)			{ if (if_function) return; }
90void if_pointer(void *p)		{ if (p) return; }
91
92/* C99 6.8.5 */
93void while_struct(struct s s)		{ while (s) return; }	/* expect: 204 *//* expect: 231 */
94void for_struct(struct s s)		{ for (;s;) return; }	/* expect: 204 *//* expect: 223 *//* expect: 231 */
95void do_while_struct(struct s s)	{ do { return; } while (s); }	/* expect: 204 *//* expect: 231 */
96
97/*
98 * C99 6.5.15 for the '?:' operator does not explicitly mention that the
99 * controlling expression must have a scalar type, curiously.
100 */
101int conditional_struct(struct s s)	{ return s ? 1 : 2; }	/* expect: 170 *//* expect: 214 *//* expect: 231 */
102