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