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149 lines
4.9 KiB
C++
149 lines
4.9 KiB
C++
//===----------------------------------------------------------------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is dual licensed under the MIT and the University of Illinois Open
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// Source Licenses. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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// UNSUPPORTED: c++98, c++03, c++11, c++14, c++17
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// template <class T>
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// constexpr T ceil2(T x) noexcept;
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// Returns: The minimal value y such that ispow2(y) is true and y >= x;
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// if y is not representable as a value of type T, the result is an unspecified value.
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// Remarks: This function shall not participate in overload resolution unless
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// T is an unsigned integer type
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#include <bit>
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#include <cstdint>
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#include <type_traits>
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#include <cassert>
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#include "test_macros.h"
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class A{};
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enum E1 : unsigned char { rEd };
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enum class E2 : unsigned char { red };
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template <typename T>
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constexpr bool constexpr_test()
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{
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return std::ceil2(T(0)) == T(1)
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&& std::ceil2(T(1)) == T(1)
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&& std::ceil2(T(2)) == T(2)
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&& std::ceil2(T(3)) == T(4)
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&& std::ceil2(T(4)) == T(4)
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&& std::ceil2(T(5)) == T(8)
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&& std::ceil2(T(6)) == T(8)
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&& std::ceil2(T(7)) == T(8)
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&& std::ceil2(T(8)) == T(8)
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&& std::ceil2(T(9)) == T(16)
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;
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}
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template <typename T>
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void runtime_test()
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{
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ASSERT_SAME_TYPE(T, decltype(std::ceil2(T(0))));
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LIBCPP_ASSERT_NOEXCEPT( std::ceil2(T(0)));
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assert( std::ceil2(T(60)) == T( 64));
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assert( std::ceil2(T(61)) == T( 64));
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assert( std::ceil2(T(62)) == T( 64));
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assert( std::ceil2(T(63)) == T( 64));
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assert( std::ceil2(T(64)) == T( 64));
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assert( std::ceil2(T(65)) == T(128));
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assert( std::ceil2(T(66)) == T(128));
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assert( std::ceil2(T(67)) == T(128));
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assert( std::ceil2(T(68)) == T(128));
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assert( std::ceil2(T(69)) == T(128));
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}
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int main()
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{
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{
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auto lambda = [](auto x) -> decltype(std::ceil2(x)) {};
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using L = decltype(lambda);
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static_assert( std::is_invocable_v<L, unsigned char>, "");
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static_assert( std::is_invocable_v<L, unsigned int>, "");
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static_assert( std::is_invocable_v<L, unsigned long>, "");
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static_assert( std::is_invocable_v<L, unsigned long long>, "");
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static_assert( std::is_invocable_v<L, uint8_t>, "");
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static_assert( std::is_invocable_v<L, uint16_t>, "");
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static_assert( std::is_invocable_v<L, uint32_t>, "");
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static_assert( std::is_invocable_v<L, uint64_t>, "");
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static_assert( std::is_invocable_v<L, size_t>, "");
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static_assert( std::is_invocable_v<L, uintmax_t>, "");
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static_assert( std::is_invocable_v<L, uintptr_t>, "");
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static_assert(!std::is_invocable_v<L, int>, "");
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static_assert(!std::is_invocable_v<L, signed int>, "");
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static_assert(!std::is_invocable_v<L, long>, "");
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static_assert(!std::is_invocable_v<L, long long>, "");
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static_assert(!std::is_invocable_v<L, int8_t>, "");
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static_assert(!std::is_invocable_v<L, int16_t>, "");
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static_assert(!std::is_invocable_v<L, int32_t>, "");
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static_assert(!std::is_invocable_v<L, int64_t>, "");
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static_assert(!std::is_invocable_v<L, ptrdiff_t>, "");
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static_assert(!std::is_invocable_v<L, bool>, "");
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static_assert(!std::is_invocable_v<L, signed char>, "");
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static_assert(!std::is_invocable_v<L, char16_t>, "");
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static_assert(!std::is_invocable_v<L, char32_t>, "");
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#ifndef _LIBCPP_HAS_NO_INT128
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static_assert( std::is_invocable_v<L, __uint128_t>, "");
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static_assert(!std::is_invocable_v<L, __int128_t>, "");
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#endif
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static_assert(!std::is_invocable_v<L, A>, "");
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static_assert(!std::is_invocable_v<L, E1>, "");
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static_assert(!std::is_invocable_v<L, E2>, "");
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}
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static_assert(constexpr_test<unsigned char>(), "");
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static_assert(constexpr_test<unsigned short>(), "");
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static_assert(constexpr_test<unsigned>(), "");
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static_assert(constexpr_test<unsigned long>(), "");
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static_assert(constexpr_test<unsigned long long>(), "");
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static_assert(constexpr_test<uint8_t>(), "");
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static_assert(constexpr_test<uint16_t>(), "");
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static_assert(constexpr_test<uint32_t>(), "");
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static_assert(constexpr_test<uint64_t>(), "");
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static_assert(constexpr_test<size_t>(), "");
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static_assert(constexpr_test<uintmax_t>(), "");
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static_assert(constexpr_test<uintptr_t>(), "");
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#ifndef _LIBCPP_HAS_NO_INT128
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static_assert(constexpr_test<__uint128_t>(), "");
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#endif
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runtime_test<unsigned char>();
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runtime_test<unsigned>();
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runtime_test<unsigned short>();
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runtime_test<unsigned long>();
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runtime_test<unsigned long long>();
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runtime_test<uint8_t>();
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runtime_test<uint16_t>();
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runtime_test<uint32_t>();
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runtime_test<uint64_t>();
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runtime_test<size_t>();
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runtime_test<uintmax_t>();
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runtime_test<uintptr_t>();
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#ifndef _LIBCPP_HAS_NO_INT128
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runtime_test<__uint128_t>();
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#endif
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}
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