1 //===----------------------------------------------------------------------===// 2 // 3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4 // See https://llvm.org/LICENSE.txt for license information. 5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6 // 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 <cstddef> 21 #include <cstdint> 22 #include <type_traits> 23 24 #include "test_macros.h" 25 26 struct A {}; 27 enum E1 : unsigned char { rEd }; 28 enum class E2 : unsigned char { red }; 29 30 template <class T> 31 constexpr bool test() 32 { 33 ASSERT_SAME_TYPE(decltype(std::bit_ceil(T())), T); 34 LIBCPP_ASSERT_NOEXCEPT(std::bit_ceil(T())); 35 36 assert(std::bit_ceil(T(0)) == T(1)); 37 assert(std::bit_ceil(T(1)) == T(1)); 38 assert(std::bit_ceil(T(2)) == T(2)); 39 assert(std::bit_ceil(T(3)) == T(4)); 40 assert(std::bit_ceil(T(4)) == T(4)); 41 assert(std::bit_ceil(T(5)) == T(8)); 42 assert(std::bit_ceil(T(6)) == T(8)); 43 assert(std::bit_ceil(T(7)) == T(8)); 44 assert(std::bit_ceil(T(8)) == T(8)); 45 assert(std::bit_ceil(T(9)) == T(16)); 46 assert(std::bit_ceil(T(60)) == T(64)); 47 assert(std::bit_ceil(T(61)) == T(64)); 48 assert(std::bit_ceil(T(62)) == T(64)); 49 assert(std::bit_ceil(T(63)) == T(64)); 50 assert(std::bit_ceil(T(64)) == T(64)); 51 assert(std::bit_ceil(T(65)) == T(128)); 52 assert(std::bit_ceil(T(66)) == T(128)); 53 assert(std::bit_ceil(T(67)) == T(128)); 54 assert(std::bit_ceil(T(68)) == T(128)); 55 assert(std::bit_ceil(T(69)) == T(128)); 56 57 #ifndef TEST_HAS_NO_INT128 58 if constexpr (std::is_same_v<T, __uint128_t>) { 59 T val = 168; 60 T ceil = 256; 61 62 assert(std::bit_ceil(val) == ceil); 63 assert(std::bit_ceil(val << 32) == (ceil << 32)); 64 assert(std::bit_ceil((val << 64) | 0x1) == (ceil << 64)); 65 assert(std::bit_ceil((val << 72) | 0x1) == (ceil << 72)); 66 assert(std::bit_ceil((val << 100) | 0x1) == (ceil << 100)); 67 } 68 #endif 69 70 return true; 71 } 72 73 int main(int, char**) 74 { 75 { 76 auto lambda = [](auto x) -> decltype(std::bit_ceil(x)) {}; 77 using L = decltype(lambda); 78 79 static_assert(!std::is_invocable_v<L, signed char>); 80 static_assert(!std::is_invocable_v<L, short>); 81 static_assert(!std::is_invocable_v<L, int>); 82 static_assert(!std::is_invocable_v<L, long>); 83 static_assert(!std::is_invocable_v<L, long long>); 84 #ifndef TEST_HAS_NO_INT128 85 static_assert(!std::is_invocable_v<L, __int128_t>); 86 #endif 87 88 static_assert(!std::is_invocable_v<L, std::int8_t>); 89 static_assert(!std::is_invocable_v<L, std::int16_t>); 90 static_assert(!std::is_invocable_v<L, std::int32_t>); 91 static_assert(!std::is_invocable_v<L, std::int64_t>); 92 static_assert(!std::is_invocable_v<L, std::intmax_t>); 93 static_assert(!std::is_invocable_v<L, std::intptr_t>); 94 static_assert(!std::is_invocable_v<L, std::ptrdiff_t>); 95 96 static_assert(!std::is_invocable_v<L, bool>); 97 static_assert(!std::is_invocable_v<L, char>); 98 static_assert(!std::is_invocable_v<L, wchar_t>); 99 #ifndef TEST_HAS_NO_CHAR8_T 100 static_assert(!std::is_invocable_v<L, char8_t>); 101 #endif 102 static_assert(!std::is_invocable_v<L, char16_t>); 103 static_assert(!std::is_invocable_v<L, char32_t>); 104 105 static_assert(!std::is_invocable_v<L, A>); 106 static_assert(!std::is_invocable_v<L, A*>); 107 static_assert(!std::is_invocable_v<L, E1>); 108 static_assert(!std::is_invocable_v<L, E2>); 109 } 110 111 static_assert(test<unsigned char>()); 112 static_assert(test<unsigned short>()); 113 static_assert(test<unsigned int>()); 114 static_assert(test<unsigned long>()); 115 static_assert(test<unsigned long long>()); 116 #ifndef TEST_HAS_NO_INT128 117 static_assert(test<__uint128_t>()); 118 #endif 119 static_assert(test<std::uint8_t>()); 120 static_assert(test<std::uint16_t>()); 121 static_assert(test<std::uint32_t>()); 122 static_assert(test<std::uint64_t>()); 123 static_assert(test<std::uintmax_t>()); 124 static_assert(test<std::uintptr_t>()); 125 static_assert(test<std::size_t>()); 126 127 test<unsigned char>(); 128 test<unsigned short>(); 129 test<unsigned int>(); 130 test<unsigned long>(); 131 test<unsigned long long>(); 132 #ifndef TEST_HAS_NO_INT128 133 test<__uint128_t>(); 134 #endif 135 test<std::uint8_t>(); 136 test<std::uint16_t>(); 137 test<std::uint32_t>(); 138 test<std::uint64_t>(); 139 test<std::uintmax_t>(); 140 test<std::uintptr_t>(); 141 test<std::size_t>(); 142 143 return 0; 144 } 145