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 }; 9 constexpr LitKind operator"" _kind(char p) { return LitKind::Char; } 10 constexpr LitKind operator"" _kind(wchar_t p) { return LitKind::WideChar; } 11 constexpr LitKind operator"" _kind(char16_t p) { return LitKind::Char16; } 12 constexpr LitKind operator"" _kind(char32_t p) { return LitKind::Char32; } 13 constexpr LitKind operator"" _kind(const char *p, size_t n) { return LitKind::CharStr; } 14 constexpr LitKind operator"" _kind(const wchar_t *p, size_t n) { return LitKind::WideStr; } 15 constexpr LitKind operator"" _kind(const char16_t *p, size_t n) { return LitKind::Char16Str; } 16 constexpr LitKind operator"" _kind(const char32_t *p, size_t n) { return LitKind::Char32Str; } 17 constexpr LitKind operator"" _kind(unsigned long long n) { return LitKind::Integer; } 18 constexpr LitKind operator"" _kind(long double n) { return LitKind::Floating; } 19 constexpr LitKind operator"" _kind2(const char *p) { return LitKind::Raw; } 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 41 constexpr const char *fractional_digits_impl(const char *p) { 42 return *p == '.' ? p + 1 : *p ? fractional_digits_impl(p + 1) : 0; 43 } 44 constexpr const char *operator"" _fractional_digits(const char *p) { 45 return fractional_digits_impl(p) ?: p; 46 } 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 } 115 116 constexpr unsigned mash(unsigned a) { 117 return 0x93ae27b5 * ((a >> 13) | a << 19); 118 } 119 template<typename=void> constexpr unsigned hash(unsigned a) { return 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; }; 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}} 142 int main() { return 0_b; } // expected-error {{no matching literal operator for call to 'operator "" _b'}} 143 } 144
