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
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
|
// RUN: %clang_cc1 -std=c++11 -verify %s -fms-extensions -triple x86_64-apple-darwin9.0.0
// A ud-suffix cannot be used on string literals in a whole bunch of contexts:
#include "foo"_bar // expected-error {{expected "FILENAME" or <FILENAME>}}
#line 1 "foo"_bar // expected-error {{user-defined suffix cannot be used here}}
# 1 "foo"_bar 1 // expected-error {{user-defined suffix cannot be used here}}
#ident "foo"_bar // expected-error {{user-defined suffix cannot be used here}}
_Pragma("foo"_bar) // expected-error {{user-defined suffix cannot be used here}}
#pragma comment(lib, "foo"_bar) // expected-error {{user-defined suffix cannot be used here}}
_Pragma("comment(lib, \"foo\"_bar)") // expected-error {{user-defined suffix cannot be used here}}
#pragma message "hi"_there // expected-error {{user-defined suffix cannot be used here}} expected-warning {{hi}}
#pragma push_macro("foo"_bar) // expected-error {{user-defined suffix cannot be used here}}
#if __has_warning("-Wan-island-to-discover"_bar) // expected-error {{user-defined suffix cannot be used here}}
#elif __has_include("foo"_bar) // expected-error {{expected "FILENAME" or <FILENAME>}}
#endif
extern "C++"_x {} // expected-error {{user-defined suffix cannot be used here}}
int f() {
asm("mov %eax, %rdx"_foo); // expected-error {{user-defined suffix cannot be used here}}
}
static_assert(true, "foo"_bar); // expected-error {{user-defined suffix cannot be used here}}
int cake() __attribute__((availability(macosx, unavailable, message = "is a lie"_x))); // expected-error {{user-defined suffix cannot be used here}}
// A ud-suffix cannot be used on character literals in preprocessor constant
// expressions:
#if 'x'_y - u'x'_z // expected-error 2{{character literal with user-defined suffix cannot be used in preprocessor constant expression}}
#error error
#endif
// A ud-suffix cannot be used on integer literals in preprocessor constant
// expressions:
#if 0_foo // expected-error {{integer literal with user-defined suffix cannot be used in preprocessor constant expression}}
#error error
#endif
// But they can appear in expressions.
constexpr char operator"" _id(char c) { return c; }
constexpr wchar_t operator"" _id(wchar_t c) { return c; }
constexpr char16_t operator"" _id(char16_t c) { return c; }
constexpr char32_t operator"" _id(char32_t c) { return c; }
using size_t = decltype(sizeof(int));
constexpr const char operator"" _id(const char *p, size_t n) { return *p; }
constexpr const wchar_t operator"" _id(const wchar_t *p, size_t n) { return *p; }
constexpr const char16_t operator"" _id(const char16_t *p, size_t n) { return *p; }
constexpr const char32_t operator"" _id(const char32_t *p, size_t n) { return *p; }
constexpr unsigned long long operator"" _id(unsigned long long n) { return n; }
constexpr long double operator"" _id(long double d) { return d; }
template<int n> struct S {};
S<"a"_id> sa;
S<L"b"_id> sb;
S<u8"c"_id> sc;
S<u"d"_id> sd;
S<U"e"_id> se;
S<'w'_id> sw;
S<L'x'_id> sx;
S<u'y'_id> sy;
S<U'z'_id> sz;
S<100_id> sn;
S<(int)1.3_id> sf;
void h() {
(void)"test"_id "test" L"test";
}
// Test source location for suffix is known
const char *p =
"foo\nbar" R"x(
erk
flux
)x" "eep\x1f"\
_no_such_suffix // expected-error {{'operator""_no_such_suffix'}}
"and a bit more"
"and another suffix"_no_such_suffix;
char c =
'\x14'\
_no_such_suffix; // expected-error {{'operator""_no_such_suffix'}}
int &r =
1234567\
_no_such_suffix; // expected-error {{'operator""_no_such_suffix'}}
int k =
1234567.89\
_no_such_suffix; // expected-error {{'operator""_no_such_suffix'}}
// Make sure we handle more interesting ways of writing a string literal which
// is "" in translation phase 7.
void operator "\
" _foo(unsigned long long); // ok
void operator R"xyzzy()xyzzy" _foo(long double); // ok
void operator"" "" R"()" "" _foo(const char *); // ok
void operator ""_no_space(const char *); // ok
// Ensure we diagnose the bad cases.
void operator "\0" _non_empty(const char *); // expected-error {{must be '""'}}
void operator L"" _not_char(const char *); // expected-error {{cannot have an encoding prefix}}
void operator "" ""
U"" // expected-error {{cannot have an encoding prefix}}
"" _also_not_char(const char *);
void operator "" u8"" "\u0123" "hello"_all_of_the_things ""(const char*); // expected-error {{must be '""'}}
// Make sure we treat UCNs and UTF-8 as equivalent.
int operator""_µs(unsigned long long) {} // expected-note {{previous}}
int hundred_µs = 50_µs + 50_\u00b5s;
int operator""_\u00b5s(unsigned long long) {} // expected-error {{redefinition of 'operator""_µs'}}
int operator""_\U0000212B(long double) {} // expected-note {{previous}}
int hundred_Å = 50.0_Å + 50._\U0000212B;
int operator""_Å(long double) {} // expected-error {{redefinition of 'operator""_Å'}}
int operator""_𐀀(char) {} // expected-note {{previous}}
int 𐀀 = '4'_𐀀 + '2'_\U00010000;
int operator""_\U00010000(char) {} // expected-error {{redefinition of 'operator""_𐀀'}}
// These all declare the same function.
int operator""_℮""_\u212e""_\U0000212e""(const char*, size_t);
int operator""_\u212e""_\U0000212e""_℮""(const char*, size_t);
int operator""_\U0000212e""_℮""_\u212e""(const char*, size_t);
int mix_ucn_utf8 = ""_℮""_\u212e""_\U0000212e"";
void operator""_℮""_ℯ(unsigned long long) {} // expected-error {{differing user-defined suffixes ('_℮' and '_ℯ') in string literal concatenation}}
void operator""_℮""_\u212f(unsigned long long) {} // expected-error {{differing user-defined suffixes ('_℮' and '_ℯ') in string literal concatenation}}
void operator""_\u212e""_ℯ(unsigned long long) {} // expected-error {{differing user-defined suffixes ('_℮' and '_ℯ') in string literal concatenation}}
void operator""_\u212e""_\u212f(unsigned long long) {} // expected-error {{differing user-defined suffixes ('_℮' and '_ℯ') in string literal concatenation}}
void operator""_℮""_℮(unsigned long long) {} // expected-note {{previous}}
void operator""_\u212e""_\u212e(unsigned long long) {} // expected-error {{redefinition}}
#define ¢ *0.01 // expected-error {{macro name must be an identifier}}
constexpr int operator""_¢(long double d) { return d * 100; } // expected-error {{non-ASCII}}
constexpr int operator""_¢(unsigned long long n) { return n; } // expected-error {{non-ASCII}}
static_assert(0.02_¢ == 2_¢, ""); // expected-error 2{{non-ASCII}}
|
