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
|
// RUN: %clang_cc1 -triple i386-apple-darwin9 -x c++ -std=c++11 -verify %s
// RUN: %clang_cc1 -triple i386-apple-darwin9 -x objective-c -verify %s
// RUN: %clang_cc1 -triple i386-apple-darwin9 -x objective-c++ -verify %s
#ifdef __cplusplus
# define EXTERN_C extern "C"
#else
# define EXTERN_C extern
#endif
EXTERN_C int printf(const char *,...);
typedef enum : short { Constant = 0 } TestEnum;
// Note that in C (and Objective-C), the type of 'Constant' is 'short'.
// In C++ (and Objective-C++) it is 'TestEnum'.
// This is why we don't check for that in the expected output.
void test(TestEnum input) {
printf("%hhd", input); // expected-warning{{format specifies type 'char' but the argument has type 'TestEnum'}}
printf("%hhd", Constant); // expected-warning{{format specifies type 'char'}}
printf("%hd", input); // no-warning
printf("%hd", Constant); // no-warning
// While these are less correct, they are still safe.
printf("%d", input); // no-warning
printf("%d", Constant); // no-warning
printf("%lld", input); // expected-warning{{format specifies type 'long long' but the argument has type 'TestEnum'}}
printf("%lld", Constant); // expected-warning{{format specifies type 'long long'}}
}
typedef enum : unsigned long { LongConstant = ~0UL } LongEnum;
void testLong(LongEnum input) {
printf("%u", input); // expected-warning{{format specifies type 'unsigned int' but the argument has type 'LongEnum'}}
printf("%u", LongConstant); // expected-warning{{format specifies type 'unsigned int'}}
printf("%lu", input);
printf("%lu", LongConstant);
}
typedef short short_t;
typedef enum : short_t { ShortConstant = 0 } ShortEnum;
void testUnderlyingTypedef(ShortEnum input) {
printf("%hhd", input); // expected-warning{{format specifies type 'char' but the argument has type 'ShortEnum'}}
printf("%hhd", ShortConstant); // expected-warning{{format specifies type 'char'}}
printf("%hd", input); // no-warning
printf("%hd", ShortConstant); // no-warning
// While these are less correct, they are still safe.
printf("%d", input); // no-warning
printf("%d", ShortConstant); // no-warning
printf("%lld", input); // expected-warning{{format specifies type 'long long' but the argument has type 'ShortEnum'}}
printf("%lld", ShortConstant); // expected-warning{{format specifies type 'long long'}}
}
typedef ShortEnum ShortEnum2;
void testTypedefChain(ShortEnum2 input) {
printf("%hhd", input); // expected-warning{{format specifies type 'char' but the argument has type 'ShortEnum2' (aka 'ShortEnum')}}
printf("%hd", input); // no-warning
printf("%d", input); // no-warning
printf("%lld", input); // expected-warning{{format specifies type 'long long' but the argument has type 'ShortEnum2' (aka 'ShortEnum')}}
}
typedef enum : char { CharConstant = 'a' } CharEnum;
// %hhd is deliberately not required to be signed, because 'char' isn't either.
// This is a separate code path in FormatString.cpp.
void testChar(CharEnum input) {
printf("%hhd", input); // no-warning
printf("%hhd", CharConstant); // no-warning
// This is not correct but it is safe. We warn because '%hd' shows intent.
printf("%hd", input); // expected-warning{{format specifies type 'short' but the argument has type 'CharEnum'}}
printf("%hd", CharConstant); // expected-warning{{format specifies type 'short'}}
// This is not correct but it matches the promotion rules (and is safe).
printf("%d", input); // no-warning
printf("%d", CharConstant); // no-warning
printf("%lld", input); // expected-warning{{format specifies type 'long long' but the argument has type 'CharEnum'}}
printf("%lld", CharConstant); // expected-warning{{format specifies type 'long long'}}
}
|
