1 //===----------------------------------------------------------------------===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is dual licensed under the MIT and the University of Illinois Open 6 // Source Licenses. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 // UNSUPPORTED: c++03, c++11, c++14, c++17 10 11 // template <class T> 12 // constexpr T bit_ceil(T x) noexcept; 13 14 // Constraints: T is an unsigned integer type 15 // Returns: The minimal value y such that has_single_bit(y) is true and y >= x; 16 // if y is not representable as a value of type T, the result is an unspecified value. 17 18 #include <bit> 19 #include <cassert> 20 #include <cstdint> 21 #include <type_traits> 22 23 #include "test_macros.h" 24 25 struct A {}; 26 enum E1 : unsigned char { rEd }; 27 enum class E2 : unsigned char { red }; 28 29 template <class T> 30 constexpr bool test() 31 { 32 ASSERT_SAME_TYPE(decltype(std::bit_ceil(T())), T); 33 LIBCPP_ASSERT_NOEXCEPT(std::bit_ceil(T())); 34 35 assert(std::bit_ceil(T(0)) == T(1)); 36 assert(std::bit_ceil(T(1)) == T(1)); 37 assert(std::bit_ceil(T(2)) == T(2)); 38 assert(std::bit_ceil(T(3)) == T(4)); 39 assert(std::bit_ceil(T(4)) == T(4)); 40 assert(std::bit_ceil(T(5)) == T(8)); 41 assert(std::bit_ceil(T(6)) == T(8)); 42 assert(std::bit_ceil(T(7)) == T(8)); 43 assert(std::bit_ceil(T(8)) == T(8)); 44 assert(std::bit_ceil(T(9)) == T(16)); 45 assert(std::bit_ceil(T(60)) == T(64)); 46 assert(std::bit_ceil(T(61)) == T(64)); 47 assert(std::bit_ceil(T(62)) == T(64)); 48 assert(std::bit_ceil(T(63)) == T(64)); 49 assert(std::bit_ceil(T(64)) == T(64)); 50 assert(std::bit_ceil(T(65)) == T(128)); 51 assert(std::bit_ceil(T(66)) == T(128)); 52 assert(std::bit_ceil(T(67)) == T(128)); 53 assert(std::bit_ceil(T(68)) == T(128)); 54 assert(std::bit_ceil(T(69)) == T(128)); 55 56 #ifndef _LIBCPP_HAS_NO_INT128 57 if constexpr (std::is_same_v<T, __uint128_t>) { 58 T val = 168; 59 T ceil = 256; 60 61 assert(std::bit_ceil(val) == ceil); 62 assert(std::bit_ceil(val << 32) == (ceil << 32)); 63 assert(std::bit_ceil((val << 64) | 0x1) == (ceil << 64)); 64 assert(std::bit_ceil((val << 72) | 0x1) == (ceil << 72)); 65 assert(std::bit_ceil((val << 100) | 0x1) == (ceil << 100)); 66 } 67 #endif 68 69 return true; 70 } 71 72 int main(int, char**) 73 { 74 { 75 auto lambda = [](auto x) -> decltype(std::bit_ceil(x)) {}; 76 using L = decltype(lambda); 77 78 static_assert(!std::is_invocable_v<L, signed char>); 79 static_assert(!std::is_invocable_v<L, short>); 80 static_assert(!std::is_invocable_v<L, int>); 81 static_assert(!std::is_invocable_v<L, long>); 82 static_assert(!std::is_invocable_v<L, long long>); 83 #ifndef _LIBCPP_HAS_NO_INT128 84 static_assert(!std::is_invocable_v<L, __int128_t>); 85 #endif 86 87 static_assert(!std::is_invocable_v<L, int8_t>); 88 static_assert(!std::is_invocable_v<L, int16_t>); 89 static_assert(!std::is_invocable_v<L, int32_t>); 90 static_assert(!std::is_invocable_v<L, int64_t>); 91 static_assert(!std::is_invocable_v<L, intmax_t>); 92 static_assert(!std::is_invocable_v<L, intptr_t>); 93 static_assert(!std::is_invocable_v<L, ptrdiff_t>); 94 95 static_assert(!std::is_invocable_v<L, bool>); 96 static_assert(!std::is_invocable_v<L, char>); 97 static_assert(!std::is_invocable_v<L, wchar_t>); 98 #ifndef _LIBCPP_HAS_NO_CHAR8_T 99 static_assert(!std::is_invocable_v<L, char8_t>); 100 #endif 101 static_assert(!std::is_invocable_v<L, char16_t>); 102 static_assert(!std::is_invocable_v<L, char32_t>); 103 104 static_assert(!std::is_invocable_v<L, A>); 105 static_assert(!std::is_invocable_v<L, A*>); 106 static_assert(!std::is_invocable_v<L, E1>); 107 static_assert(!std::is_invocable_v<L, E2>); 108 } 109 110 static_assert(test<unsigned char>()); 111 static_assert(test<unsigned short>()); 112 static_assert(test<unsigned int>()); 113 static_assert(test<unsigned long>()); 114 static_assert(test<unsigned long long>()); 115 #ifndef _LIBCPP_HAS_NO_INT128 116 static_assert(test<__uint128_t>()); 117 #endif 118 static_assert(test<uint8_t>()); 119 static_assert(test<uint16_t>()); 120 static_assert(test<uint32_t>()); 121 static_assert(test<uint64_t>()); 122 static_assert(test<uintmax_t>()); 123 static_assert(test<uintptr_t>()); 124 static_assert(test<size_t>()); 125 126 test<unsigned char>(); 127 test<unsigned short>(); 128 test<unsigned int>(); 129 test<unsigned long>(); 130 test<unsigned long long>(); 131 #ifndef _LIBCPP_HAS_NO_INT128 132 test<__uint128_t>(); 133 #endif 134 test<uint8_t>(); 135 test<uint16_t>(); 136 test<uint32_t>(); 137 test<uint64_t>(); 138 test<uintmax_t>(); 139 test<uintptr_t>(); 140 test<size_t>(); 141 142 return 0; 143 } 144