| // Copyright (C) 2017-2021 Free Software Foundation, Inc. |
| // |
| // This file is part of the GNU ISO C++ Library. This library is free |
| // software; you can redistribute it and/or modify it under the |
| // terms of the GNU General Public License as published by the |
| // Free Software Foundation; either version 3, or (at your option) |
| // any later version. |
| |
| // This library is distributed in the hope that it will be useful, |
| // but WITHOUT ANY WARRANTY; without even the implied warranty of |
| // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| // GNU General Public License for more details. |
| |
| // You should have received a copy of the GNU General Public License along |
| // with this library; see the file COPYING3. If not see |
| // <http://www.gnu.org/licenses/>. |
| |
| // { dg-do compile { target c++17 } } |
| |
| #include <cstddef> |
| |
| constexpr bool is_byte(std::byte) { return true; } |
| template<typename T> constexpr bool is_byte(T) { return false; } |
| |
| template<typename T> |
| constexpr bool test_lshift_assign(unsigned char c, T t) |
| { |
| std::byte b{c}; |
| b <<= t; |
| return b == std::byte(c << t); |
| } |
| |
| static_assert( test_lshift_assign(0, 1) ); |
| static_assert( test_lshift_assign(0, 1u) ); |
| static_assert( test_lshift_assign(0, 1ll) ); |
| static_assert( test_lshift_assign(4, 1) ); |
| static_assert( test_lshift_assign(9, 2u) ); |
| static_assert( test_lshift_assign(16, 3ll) ); |
| static_assert( test_lshift_assign(127, 1) ); |
| static_assert( test_lshift_assign(255, 2u) ); |
| static_assert( test_lshift_assign(63, 3ll) ); |
| |
| template<typename T> |
| constexpr bool test_lshift(unsigned char c, T t) |
| { |
| const std::byte b{c}; |
| const std::byte b2 = b << t; |
| return b2 == std::byte(c << t); |
| } |
| |
| static_assert( test_lshift(0, 1) ); |
| static_assert( test_lshift(0, 1u) ); |
| static_assert( test_lshift(0, 1ll) ); |
| static_assert( test_lshift(4, 1) ); |
| static_assert( test_lshift(9, 2u) ); |
| static_assert( test_lshift(16, 3ll) ); |
| static_assert( test_lshift(127, 1) ); |
| static_assert( test_lshift(255, 2u) ); |
| static_assert( test_lshift(63, 3ll) ); |
| |
| template<typename T> |
| constexpr bool test_rshift_assign(unsigned char c, T t) |
| { |
| std::byte b{c}; |
| b >>= t; |
| return b == std::byte(c >> t); |
| } |
| |
| static_assert( test_rshift_assign(0, 1) ); |
| static_assert( test_rshift_assign(0, 1u) ); |
| static_assert( test_rshift_assign(0, 1ll) ); |
| static_assert( test_rshift_assign(4, 1) ); |
| static_assert( test_rshift_assign(9, 2u) ); |
| static_assert( test_rshift_assign(16, 3ll) ); |
| static_assert( test_rshift_assign(127, 1) ); |
| static_assert( test_rshift_assign(255, 2u) ); |
| static_assert( test_rshift_assign(63, 3ll) ); |
| |
| template<typename T> |
| constexpr bool test_rshift(unsigned char c, T t) |
| { |
| const std::byte b{c}; |
| const std::byte b2 = b >> t; |
| return b2 == std::byte(c >> t); |
| } |
| |
| static_assert( test_rshift(0, 1) ); |
| static_assert( test_rshift(0, 1u) ); |
| static_assert( test_rshift(0, 1ll) ); |
| static_assert( test_rshift(4, 1) ); |
| static_assert( test_rshift(9, 2u) ); |
| static_assert( test_rshift(16, 3ll) ); |
| static_assert( test_rshift(127, 1) ); |
| static_assert( test_rshift(255, 2u) ); |
| static_assert( test_rshift(63, 3ll) ); |
| |
| constexpr bool test_or_assign(unsigned char l, unsigned char r) |
| { |
| std::byte b{l}; |
| b |= std::byte{r}; |
| return b == std::byte(l | r); |
| } |
| |
| static_assert( test_or_assign(0, 1) ); |
| static_assert( test_or_assign(4, 1) ); |
| static_assert( test_or_assign(9, 2) ); |
| static_assert( test_or_assign(16, 3) ); |
| static_assert( test_or_assign(63, 3) ); |
| static_assert( test_or_assign(127, 1) ); |
| static_assert( test_or_assign(255, 2) ); |
| |
| constexpr bool test_or(unsigned char l, unsigned char r) |
| { |
| const std::byte b1{l}; |
| const std::byte b2{r}; |
| return (b1 | b2) == std::byte(l | r); |
| } |
| |
| static_assert( test_or(0, 1) ); |
| static_assert( test_or(0, 1u) ); |
| static_assert( test_or(0, 1ll) ); |
| static_assert( test_or(4, 1) ); |
| static_assert( test_or(9, 2u) ); |
| static_assert( test_or(16, 3ll) ); |
| static_assert( test_or(127, 1) ); |
| static_assert( test_or(255, 2u) ); |
| static_assert( test_or(63, 3ll) ); |
| |
| constexpr bool test_and_assign(unsigned char l, unsigned char r) |
| { |
| std::byte b{l}; |
| b &= std::byte{r}; |
| return b == std::byte(l & r); |
| } |
| |
| static_assert( test_and_assign(0, 1) ); |
| static_assert( test_and_assign(0, 1u) ); |
| static_assert( test_and_assign(0, 1ll) ); |
| static_assert( test_and_assign(4, 1) ); |
| static_assert( test_and_assign(9, 2u) ); |
| static_assert( test_and_assign(16, 3ll) ); |
| static_assert( test_and_assign(127, 1) ); |
| static_assert( test_and_assign(255, 2u) ); |
| static_assert( test_and_assign(63, 3ll) ); |
| |
| constexpr bool test_and(unsigned char l, unsigned char r) |
| { |
| const std::byte b1{l}; |
| const std::byte b2{r}; |
| return (b1 & b2) == std::byte(l & r); |
| } |
| |
| static_assert( test_and(0, 1) ); |
| static_assert( test_and(0, 1u) ); |
| static_assert( test_and(0, 1ll) ); |
| static_assert( test_and(4, 1) ); |
| static_assert( test_and(9, 2u) ); |
| static_assert( test_and(16, 3ll) ); |
| static_assert( test_and(127, 1) ); |
| static_assert( test_and(255, 2u) ); |
| static_assert( test_and(63, 3ll) ); |
| |
| constexpr bool test_xor_assign(unsigned char l, unsigned char r) |
| { |
| std::byte b{l}; |
| b ^= std::byte{r}; |
| return b == std::byte(l ^ r); |
| } |
| |
| static_assert( test_xor_assign(0, 1) ); |
| static_assert( test_xor_assign(0, 1u) ); |
| static_assert( test_xor_assign(0, 1ll) ); |
| static_assert( test_xor_assign(4, 1) ); |
| static_assert( test_xor_assign(9, 2u) ); |
| static_assert( test_xor_assign(16, 3ll) ); |
| static_assert( test_xor_assign(127, 1) ); |
| static_assert( test_xor_assign(255, 2u) ); |
| static_assert( test_xor_assign(63, 3ll) ); |
| |
| constexpr bool test_xor(unsigned char l, unsigned char r) |
| { |
| const std::byte b1{l}; |
| const std::byte b2{r}; |
| return (b1 ^ b2) == std::byte(l ^ r); |
| } |
| |
| static_assert( test_xor(0, 1) ); |
| static_assert( test_xor(0, 1u) ); |
| static_assert( test_xor(0, 1ll) ); |
| static_assert( test_xor(4, 1) ); |
| static_assert( test_xor(9, 2u) ); |
| static_assert( test_xor(16, 3ll) ); |
| static_assert( test_xor(127, 1) ); |
| static_assert( test_xor(255, 2u) ); |
| static_assert( test_xor(63, 3ll) ); |
| |
| constexpr bool test_complement(unsigned char c) |
| { |
| const std::byte b{c}; |
| return ~b == std::byte(~c); |
| } |
| |
| static_assert( test_complement(0) ); |
| static_assert( test_complement(4) ); |
| static_assert( test_complement(9) ); |
| static_assert( test_complement(16) ); |
| static_assert( test_complement(63) ); |
| static_assert( test_complement(127) ); |
| static_assert( test_complement(255) ); |
| |
| template<typename T> |
| constexpr bool test_to_integer(unsigned char c) |
| { |
| std::byte b{c}; |
| return std::to_integer<T>(b) == T(c); |
| } |
| |
| static_assert( test_to_integer<int>(0) ); |
| static_assert( test_to_integer<int>(255) ); |
| static_assert( test_to_integer<signed char>(0) ); |
| static_assert( test_to_integer<signed char>(255) ); |
| static_assert( test_to_integer<unsigned>(0) ); |
| static_assert( test_to_integer<unsigned>(255) ); |
| #ifdef _GLIBCXX_USE_CHAR8_T |
| static_assert( test_to_integer<char8_t>(0) ); |
| static_assert( test_to_integer<char8_t>(255) ); |
| #endif |
| static_assert( test_to_integer<char16_t>(0) ); |
| static_assert( test_to_integer<char16_t>(255) ); |
| static_assert( test_to_integer<char32_t>(0) ); |
| static_assert( test_to_integer<char32_t>(255) ); |