diff options
Diffstat (limited to 'libcxx/test/std/numerics/bit/bit.pow.two/ceil2.pass.cpp')
| -rw-r--r-- | libcxx/test/std/numerics/bit/bit.pow.two/ceil2.pass.cpp | 148 |
1 files changed, 148 insertions, 0 deletions
diff --git a/libcxx/test/std/numerics/bit/bit.pow.two/ceil2.pass.cpp b/libcxx/test/std/numerics/bit/bit.pow.two/ceil2.pass.cpp new file mode 100644 index 00000000000..a469fad9257 --- /dev/null +++ b/libcxx/test/std/numerics/bit/bit.pow.two/ceil2.pass.cpp @@ -0,0 +1,148 @@ +//===----------------------------------------------------------------------===// +// +// The LLVM Compiler Infrastructure +// +// This file is dual licensed under the MIT and the University of Illinois Open +// Source Licenses. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// +// UNSUPPORTED: c++98, c++03, c++11, c++14, c++17 + +// template <class T> +// constexpr T ceil2(T x) noexcept; + +// Returns: The minimal value y such that ispow2(y) is true and y >= x; +// if y is not representable as a value of type T, the result is an unspecified value. +// Remarks: This function shall not participate in overload resolution unless +// T is an unsigned integer type + +#include <bit> +#include <cstdint> +#include <type_traits> +#include <cassert> + +#include "test_macros.h" + +class A{}; +enum E1 : unsigned char { rEd }; +enum class E2 : unsigned char { red }; + +template <typename T> +constexpr bool constexpr_test() +{ + return std::ceil2(T(0)) == T(1) + && std::ceil2(T(1)) == T(1) + && std::ceil2(T(2)) == T(2) + && std::ceil2(T(3)) == T(4) + && std::ceil2(T(4)) == T(4) + && std::ceil2(T(5)) == T(8) + && std::ceil2(T(6)) == T(8) + && std::ceil2(T(7)) == T(8) + && std::ceil2(T(8)) == T(8) + && std::ceil2(T(9)) == T(16) + ; +} + + +template <typename T> +void runtime_test() +{ + ASSERT_SAME_TYPE(T, decltype(std::ceil2(T(0)))); + LIBCPP_ASSERT_NOEXCEPT( std::ceil2(T(0))); + + assert( std::ceil2(T(60)) == T( 64)); + assert( std::ceil2(T(61)) == T( 64)); + assert( std::ceil2(T(62)) == T( 64)); + assert( std::ceil2(T(63)) == T( 64)); + assert( std::ceil2(T(64)) == T( 64)); + assert( std::ceil2(T(65)) == T(128)); + assert( std::ceil2(T(66)) == T(128)); + assert( std::ceil2(T(67)) == T(128)); + assert( std::ceil2(T(68)) == T(128)); + assert( std::ceil2(T(69)) == T(128)); +} + +int main() +{ + + { + auto lambda = [](auto x) -> decltype(std::ceil2(x)) {}; + using L = decltype(lambda); + + static_assert( std::is_invocable_v<L, unsigned char>, ""); + static_assert( std::is_invocable_v<L, unsigned int>, ""); + static_assert( std::is_invocable_v<L, unsigned long>, ""); + static_assert( std::is_invocable_v<L, unsigned long long>, ""); + + static_assert( std::is_invocable_v<L, uint8_t>, ""); + static_assert( std::is_invocable_v<L, uint16_t>, ""); + static_assert( std::is_invocable_v<L, uint32_t>, ""); + static_assert( std::is_invocable_v<L, uint64_t>, ""); + static_assert( std::is_invocable_v<L, size_t>, ""); + + static_assert( std::is_invocable_v<L, uintmax_t>, ""); + static_assert( std::is_invocable_v<L, uintptr_t>, ""); + + + static_assert(!std::is_invocable_v<L, int>, ""); + static_assert(!std::is_invocable_v<L, signed int>, ""); + static_assert(!std::is_invocable_v<L, long>, ""); + static_assert(!std::is_invocable_v<L, long long>, ""); + + static_assert(!std::is_invocable_v<L, int8_t>, ""); + static_assert(!std::is_invocable_v<L, int16_t>, ""); + static_assert(!std::is_invocable_v<L, int32_t>, ""); + static_assert(!std::is_invocable_v<L, int64_t>, ""); + static_assert(!std::is_invocable_v<L, ptrdiff_t>, ""); + + static_assert(!std::is_invocable_v<L, bool>, ""); + static_assert(!std::is_invocable_v<L, signed char>, ""); + static_assert(!std::is_invocable_v<L, char16_t>, ""); + static_assert(!std::is_invocable_v<L, char32_t>, ""); + +#ifndef _LIBCPP_HAS_NO_INT128 + static_assert( std::is_invocable_v<L, __uint128_t>, ""); + static_assert(!std::is_invocable_v<L, __int128_t>, ""); +#endif + + static_assert(!std::is_invocable_v<L, A>, ""); + static_assert(!std::is_invocable_v<L, E1>, ""); + static_assert(!std::is_invocable_v<L, E2>, ""); + } + + static_assert(constexpr_test<unsigned char>(), ""); + static_assert(constexpr_test<unsigned short>(), ""); + static_assert(constexpr_test<unsigned>(), ""); + static_assert(constexpr_test<unsigned long>(), ""); + static_assert(constexpr_test<unsigned long long>(), ""); + + static_assert(constexpr_test<uint8_t>(), ""); + static_assert(constexpr_test<uint16_t>(), ""); + static_assert(constexpr_test<uint32_t>(), ""); + static_assert(constexpr_test<uint64_t>(), ""); + static_assert(constexpr_test<size_t>(), ""); + static_assert(constexpr_test<uintmax_t>(), ""); + static_assert(constexpr_test<uintptr_t>(), ""); + +#ifndef _LIBCPP_HAS_NO_INT128 + static_assert(constexpr_test<__uint128_t>(), ""); +#endif + + runtime_test<unsigned char>(); + runtime_test<unsigned>(); + runtime_test<unsigned short>(); + runtime_test<unsigned long>(); + runtime_test<unsigned long long>(); + + runtime_test<uint8_t>(); + runtime_test<uint16_t>(); + runtime_test<uint32_t>(); + runtime_test<uint64_t>(); + runtime_test<size_t>(); + runtime_test<uintmax_t>(); + runtime_test<uintptr_t>(); + +#ifndef _LIBCPP_HAS_NO_INT128 + runtime_test<__uint128_t>(); +#endif +} |
