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
|
// RUN: %clang_cc1 -fchar8_t -std=c++17 -verify %s
// RUN: %clang_cc1 -std=c++2a -verify=expected %s
// RUN: %clang_cc1 -std=c++2a -verify=expected -fno-signed-char %s
char8_t a = u8'a';
char8_t b[] = u8"foo";
char8_t c = 'a';
char8_t d[] = "foo"; // expected-error {{initializing 'char8_t' array with plain string literal}} expected-note {{add 'u8' prefix}}
char e = u8'a';
char g = 'a';
char h[] = "foo";
unsigned char i[] = u8"foo";
unsigned char j[] = { u8"foo" };
char k[] = u8"foo";
char l[] = { u8"foo" };
signed char m[] = u8"foo"; // expected-error {{initialization of char array with UTF-8 string literal is not permitted}}
signed char n[] = { u8"foo" }; // expected-error {{cannot initialize an array element of type 'signed char' with an lvalue of type 'const char8_t[4]'}}
const unsigned char* uptr = u8"foo"; // expected-error {{cannot initialize}}
const signed char* sptr = u8"foo"; // expected-error {{cannot initialize}}
const char* ptr = u8"foo"; // expected-error {{cannot initialize}}
template <typename T>
void check_values() {
constexpr T c[] = {0, static_cast<T>(0xFF), 0x42};
constexpr T a[] = u8"\x00\xFF\x42";
static_assert(a[0] == c[0]);
static_assert(a[1] == c[1]);
static_assert(a[2] == c[2]);
}
void call_check_values() {
check_values<char>();
check_values<unsigned char>();
}
void disambig() {
char8_t (a) = u8'x';
}
void operator""_a(char);
void operator""_a(const char*, decltype(sizeof(0)));
void test_udl1() {
int &x = u8'a'_a; // expected-error {{no matching literal operator}}
float &y = u8"a"_a; // expected-error {{no matching literal operator}}
}
int &operator""_a(char8_t);
float &operator""_a(const char8_t*, decltype(sizeof(0)));
void test_udl2() {
int &x = u8'a'_a;
float &y = u8"a"_a;
}
template<typename E, typename T> void check(T &&t) {
using Check = E;
using Check = T;
}
void check_deduction() {
check<char8_t>(u8'a');
check<const char8_t(&)[5]>(u8"a\u1000");
}
static_assert(sizeof(char8_t) == 1);
static_assert(char8_t(-1) > 0);
static_assert(u8"\u0080"[0] > 0);
namespace ambiguous {
struct A {
char8_t s[10];
};
struct B {
char s[10];
};
void f(A); // expected-note {{candidate}}
void f(B); // expected-note {{candidate}}
int test() {
f({u8"foo"}); // expected-error {{call to 'f' is ambiguous}}
}
}
|
