1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
|
// RUN: %clang_cc1 -verify -std=c2x %s
/* WG14 N2927: yes
* Not-so-magic: typeof
*/
// These examples originated in WG14 N2927 but were modified to test particular
// compiler behaviors. Each of these examples come from C2x 6.7.2.5.
// EXAMPLE 1
typeof(1 + 1) func();
int func();
// EXAMPLE 2
const _Atomic int purr = 0;
const int meow = 1;
const char *const mew[] = {
"aardvark",
"bluejay",
"catte",
};
extern typeof_unqual(purr) plain_purr;
extern int plain_purr;
extern typeof(_Atomic typeof(meow)) atomic_meow;
extern const _Atomic int atomic_meow;
extern typeof(mew) mew_array;
extern const char *const mew_array[3];
extern typeof_unqual(mew) mew2_array;
extern const char *mew2_array[3];
// EXAMPLE 3
void foo(int argc, char *argv[]) { // expected-note 2 {{declared here}}
_Static_assert(sizeof(typeof('p')) == sizeof(int));
_Static_assert(sizeof(typeof('p')) == sizeof('p'));
_Static_assert(sizeof(typeof((char)'p')) == sizeof(char));
_Static_assert(sizeof(typeof((char)'p')) == sizeof((char)'p'));
_Static_assert(sizeof(typeof("meow")) == sizeof(char[5]));
_Static_assert(sizeof(typeof("meow")) == sizeof("meow"));
_Static_assert(sizeof(typeof(argc)) == sizeof(int));
_Static_assert(sizeof(typeof(argc)) == sizeof(argc));
_Static_assert(sizeof(typeof(argv)) == sizeof(char**));
_Static_assert(sizeof(typeof(argv)) == sizeof(argv)); // expected-warning {{sizeof on array function parameter will return size of 'char **' instead of 'char *[]'}}
_Static_assert(sizeof(typeof_unqual('p')) == sizeof(int));
_Static_assert(sizeof(typeof_unqual('p')) == sizeof('p'));
_Static_assert(sizeof(typeof_unqual((char)'p')) == sizeof(char));
_Static_assert(sizeof(typeof_unqual((char)'p')) == sizeof((char)'p'));
_Static_assert(sizeof(typeof_unqual("meow")) == sizeof(char[5]));
_Static_assert(sizeof(typeof_unqual("meow")) == sizeof("meow"));
_Static_assert(sizeof(typeof_unqual(argc)) == sizeof(int));
_Static_assert(sizeof(typeof_unqual(argc)) == sizeof(argc));
_Static_assert(sizeof(typeof_unqual(argv)) == sizeof(char**));
_Static_assert(sizeof(typeof_unqual(argv)) == sizeof(argv)); // expected-warning {{sizeof on array function parameter will return size of 'char **' instead of 'char *[]'}}
}
// EXAMPLE 4
void bar(int argc) {
extern int val;
extern typeof(typeof_unqual(typeof(argc)))val;
}
// EXAMPLE 5 is tested by n2927_2.c because it is a codegen test.
// EXAMPLE 6
extern const char *y[4];
extern typeof(typeof(const char*)[4]) y;
// EXAMPLE 7
void f(int);
void g(double);
typeof(f(5)) g(double x); // g has type "void(double)"
extern void (*h)(double);
extern typeof(g)* h; // h has type "void(*)(double)"
extern typeof(true ? g : 0) h; // h has type "void(*)(double)"
void j(double *, double **);
void j(double A[5], typeof(A)* B); // j has type "void(double*, double**)"
extern typeof(double[]) D; // D has an incomplete type
extern double C[2];
extern typeof(D) C; // C has type "double[2]"
typeof(D) D = { 5, 8.9, 0.1, 99 }; // D is now completed to "double[4]"
extern double E[4];
extern typeof(D) E; // E has type "double[4]" from Ds completed type
// GH64713 -- this used to trigger an infinite loop when creating the function
// declaration for F from the function designator specified by typeof.
typeof(int(int)) F; // F has type "int(int)"
|
