1 // RUN: %clang_cc1 -std=c++11 -verify %s -fms-extensions -triple x86_64-apple-darwin9.0.0
2
3 using size_t = decltype(sizeof(int));
4 enum class LitKind {
5 Char, WideChar, Char16, Char32,
6 CharStr, WideStr, Char16Str, Char32Str,
7 Integer, Floating, Raw, Template
8 };
operator ""_kind(char p)9 constexpr LitKind operator"" _kind(char p) { return LitKind::Char; }
operator ""_kind(wchar_t p)10 constexpr LitKind operator"" _kind(wchar_t p) { return LitKind::WideChar; }
operator ""_kind(char16_t p)11 constexpr LitKind operator"" _kind(char16_t p) { return LitKind::Char16; }
operator ""_kind(char32_t p)12 constexpr LitKind operator"" _kind(char32_t p) { return LitKind::Char32; }
operator ""_kind(const char * p,size_t n)13 constexpr LitKind operator"" _kind(const char *p, size_t n) { return LitKind::CharStr; }
operator ""_kind(const wchar_t * p,size_t n)14 constexpr LitKind operator"" _kind(const wchar_t *p, size_t n) { return LitKind::WideStr; }
operator ""_kind(const char16_t * p,size_t n)15 constexpr LitKind operator"" _kind(const char16_t *p, size_t n) { return LitKind::Char16Str; }
operator ""_kind(const char32_t * p,size_t n)16 constexpr LitKind operator"" _kind(const char32_t *p, size_t n) { return LitKind::Char32Str; }
operator ""_kind(unsigned long long n)17 constexpr LitKind operator"" _kind(unsigned long long n) { return LitKind::Integer; }
operator ""_kind(long double n)18 constexpr LitKind operator"" _kind(long double n) { return LitKind::Floating; }
operator ""_kind2(const char * p)19 constexpr LitKind operator"" _kind2(const char *p) { return LitKind::Raw; }
operator ""_kind3()20 template<char ...Cs> constexpr LitKind operator"" _kind3() { return LitKind::Template; }
21
22 static_assert('x'_kind == LitKind::Char, "");
23 static_assert(L'x'_kind == LitKind::WideChar, "");
24 static_assert(u'x'_kind == LitKind::Char16, "");
25 static_assert(U'x'_kind == LitKind::Char32, "");
26 static_assert("foo"_kind == LitKind::CharStr, "");
27 static_assert(u8"foo"_kind == LitKind::CharStr, "");
28 static_assert(L"foo"_kind == LitKind::WideStr, "");
29 static_assert(u"foo"_kind == LitKind::Char16Str, "");
30 static_assert(U"foo"_kind == LitKind::Char32Str, "");
31 static_assert(194_kind == LitKind::Integer, "");
32 static_assert(0377_kind == LitKind::Integer, "");
33 static_assert(0x5ffc_kind == LitKind::Integer, "");
34 static_assert(.5954_kind == LitKind::Floating, "");
35 static_assert(1._kind == LitKind::Floating, "");
36 static_assert(1.e-2_kind == LitKind::Floating, "");
37 static_assert(4e6_kind == LitKind::Floating, "");
38 static_assert(4e6_kind2 == LitKind::Raw, "");
39 static_assert(4e6_kind3 == LitKind::Template, "");
40
fractional_digits_impl(const char * p)41 constexpr const char *fractional_digits_impl(const char *p) {
42 return *p == '.' ? p + 1 : *p ? fractional_digits_impl(p + 1) : 0;
43 }
operator ""_fractional_digits(const char * p)44 constexpr const char *operator"" _fractional_digits(const char *p) {
45 return fractional_digits_impl(p) ?: p;
46 }
streq(const char * p,const char * q)47 constexpr bool streq(const char *p, const char *q) {
48 return *p == *q && (!*p || streq(p+1, q+1));
49 }
50
51 static_assert(streq(143.97_fractional_digits, "97"), "");
52 static_assert(streq(0x786_fractional_digits, "0x786"), "");
53 static_assert(streq(.4_fractional_digits, "4"), "");
54 static_assert(streq(4._fractional_digits, ""), "");
55 static_assert(streq(1e+97_fractional_digits, "1e+97"), "");
56 static_assert(streq(0377_fractional_digits, "0377"), "");
57 static_assert(streq(0377.5_fractional_digits, "5"), "");
58
59 int operator"" _ambiguous(char); // expected-note {{candidate}}
60 namespace N {
61 void *operator"" _ambiguous(char); // expected-note {{candidate}}
62 }
63 using namespace N;
64 int k = 'x'_ambiguous; // expected-error {{ambiguous}}
65
66 int operator"" _deleted(unsigned long long) = delete; // expected-note {{here}}
67 int m = 42_deleted; // expected-error {{attempt to use a deleted}}
68
69 namespace Using {
70 namespace M {
71 int operator"" _using(char);
72 }
73 int k1 = 'x'_using; // expected-error {{no matching literal operator for call to 'operator""_using'}}
74
75 using M::operator "" _using;
76 int k2 = 'x'_using;
77 }
78
79 namespace AmbiguousRawTemplate {
80 int operator"" _ambig1(const char *); // expected-note {{candidate}}
81 template<char...> int operator"" _ambig1(); // expected-note {{candidate}}
82
83 int k1 = 123_ambig1; // expected-error {{call to 'operator""_ambig1' is ambiguous}}
84
85 namespace Inner {
86 template<char...> int operator"" _ambig2(); // expected-note 3{{candidate}}
87 }
88 int operator"" _ambig2(const char *); // expected-note 3{{candidate}}
89 using Inner::operator"" _ambig2;
90
91 int k2 = 123_ambig2; // expected-error {{call to 'operator""_ambig2' is ambiguous}}
92
93 namespace N {
94 using Inner::operator"" _ambig2;
95
96 int k3 = 123_ambig2; // ok
97
98 using AmbiguousRawTemplate::operator"" _ambig2;
99
100 int k4 = 123_ambig2; // expected-error {{ambiguous}}
101
102 namespace M {
103
104 template<char...> int operator"" _ambig2();
105
106 int k5 = 123_ambig2; // ok
107 }
108
109 int operator"" _ambig2(unsigned long long);
110
111 int k6 = 123_ambig2; // ok
112 int k7 = 123._ambig2; // expected-error {{ambiguous}}
113 }
114 }
115
mash(unsigned a)116 constexpr unsigned mash(unsigned a) {
117 return 0x93ae27b5 * ((a >> 13) | a << 19);
118 }
hash(unsigned a)119 template<typename=void> constexpr unsigned hash(unsigned a) { return a; }
hash(unsigned a)120 template<char C, char...Cs> constexpr unsigned hash(unsigned a) {
121 return hash<Cs...>(mash(a ^ mash(C)));
122 }
123 template<typename T, T v> struct constant { constexpr static T value = v; };
operator ""_hash()124 template<char...Cs> constexpr unsigned operator"" _hash() {
125 return constant<unsigned, hash<Cs...>(0)>::value;
126 }
127 static_assert(0x1234_hash == 0x103eff5e, "");
128 static_assert(hash<'0', 'x', '1', '2', '3', '4'>(0) == 0x103eff5e, "");
129
130 // Functions and literal suffixes go in separate namespaces.
131 namespace Namespace {
132 template<char...> int operator"" _x();
133 int k = _x(); // expected-error {{undeclared identifier '_x'}}
134
135 int _y(unsigned long long);
136 int k2 = 123_y; // expected-error {{no matching literal operator for call to 'operator""_y'}}
137 }
138
139 namespace PR14950 {
140 template<...> // expected-error {{expected template parameter}}
141 int operator"" _b(); // expected-error {{no function template matches function template specialization}}
main()142 int main() { return 0_b; } // expected-error {{no matching literal operator for call to 'operator""_b'}}
143 }
144
145 namespace bad_names {
146 template<char...> int operator""_x();
147
f()148 template<typename T> void f() {
149 class T:: // expected-error {{anonymous class}} expected-warning {{does not declare anything}}
150 operator // expected-error {{expected identifier}}
151 ""_q<'a'>;
152
153 T::template operator""_q<'a'>(); // expected-error {{non-namespace scope 'T::' cannot have a literal operator member}} expected-error +{{}}
154 T::template operator""_q<'a'>::X; // expected-error {{non-namespace scope 'T::' cannot have a literal operator member}} expected-error +{{}}
155 T::operator""_q<'a'>(); // expected-error {{non-namespace scope 'T::' cannot have a literal operator member}} expected-error +{{}}
156 typename T::template operator""_q<'a'> a; // expected-error {{non-namespace scope 'T::' cannot have a literal operator member}} expected-error +{{}}
157 typename T::operator""_q(""); // expected-error +{{}} expected-note {{to match}}
158 T::operator""_q(""); // expected-error {{non-namespace scope 'T::' cannot have a literal operator member}}
159
160 bad_names::operator""_x<'a', 'b', 'c'>();
161 };
162
163 struct S {};
g()164 void g() {
165 S::operator""_q(); // expected-error {{non-namespace scope 'S::' cannot have a literal operator member}}
166 }
167 }
168