mirror of
https://github.com/autc04/Retro68.git
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225 lines
6.5 KiB
C++
225 lines
6.5 KiB
C++
// Copyright (C) 2017 Free Software Foundation, Inc.
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//
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// This file is part of the GNU ISO C++ Library. This library is free
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// software; you can redistribute it and/or modify it under the
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// terms of the GNU General Public License as published by the
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// Free Software Foundation; either version 3, or (at your option)
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// any later version.
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// This library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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// You should have received a copy of the GNU General Public License along
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// with this library; see the file COPYING3. If not see
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// <http://www.gnu.org/licenses/>.
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// { dg-options "-std=gnu++17" }
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// { dg-do compile { target c++1z } }
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#include <cstddef>
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constexpr bool is_byte(std::byte) { return true; }
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template<typename T> constexpr bool is_byte(T) { return false; }
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template<typename T>
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constexpr bool test_lshift_assign(unsigned char c, T t)
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{
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std::byte b{c};
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b <<= t;
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return b == std::byte(c << t);
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}
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static_assert( test_lshift_assign(0, 1) );
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static_assert( test_lshift_assign(0, 1u) );
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static_assert( test_lshift_assign(0, 1ll) );
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static_assert( test_lshift_assign(4, 1) );
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static_assert( test_lshift_assign(9, 2u) );
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static_assert( test_lshift_assign(16, 3ll) );
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static_assert( test_lshift_assign(127, 1) );
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static_assert( test_lshift_assign(255, 2u) );
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static_assert( test_lshift_assign(63, 3ll) );
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template<typename T>
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constexpr bool test_lshift(unsigned char c, T t)
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{
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const std::byte b{c};
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const std::byte b2 = b << t;
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return b2 == std::byte(c << t);
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}
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static_assert( test_lshift(0, 1) );
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static_assert( test_lshift(0, 1u) );
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static_assert( test_lshift(0, 1ll) );
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static_assert( test_lshift(4, 1) );
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static_assert( test_lshift(9, 2u) );
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static_assert( test_lshift(16, 3ll) );
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static_assert( test_lshift(127, 1) );
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static_assert( test_lshift(255, 2u) );
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static_assert( test_lshift(63, 3ll) );
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template<typename T>
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constexpr bool test_rshift_assign(unsigned char c, T t)
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{
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std::byte b{c};
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b >>= t;
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return b == std::byte(c >> t);
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}
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static_assert( test_rshift_assign(0, 1) );
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static_assert( test_rshift_assign(0, 1u) );
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static_assert( test_rshift_assign(0, 1ll) );
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static_assert( test_rshift_assign(4, 1) );
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static_assert( test_rshift_assign(9, 2u) );
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static_assert( test_rshift_assign(16, 3ll) );
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static_assert( test_rshift_assign(127, 1) );
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static_assert( test_rshift_assign(255, 2u) );
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static_assert( test_rshift_assign(63, 3ll) );
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template<typename T>
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constexpr bool test_rshift(unsigned char c, T t)
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{
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const std::byte b{c};
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const std::byte b2 = b >> t;
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return b2 == std::byte(c >> t);
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}
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static_assert( test_rshift(0, 1) );
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static_assert( test_rshift(0, 1u) );
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static_assert( test_rshift(0, 1ll) );
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static_assert( test_rshift(4, 1) );
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static_assert( test_rshift(9, 2u) );
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static_assert( test_rshift(16, 3ll) );
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static_assert( test_rshift(127, 1) );
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static_assert( test_rshift(255, 2u) );
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static_assert( test_rshift(63, 3ll) );
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constexpr bool test_or_assign(unsigned char l, unsigned char r)
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{
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std::byte b{l};
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b |= std::byte{r};
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return b == std::byte(l | r);
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}
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static_assert( test_or_assign(0, 1) );
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static_assert( test_or_assign(4, 1) );
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static_assert( test_or_assign(9, 2) );
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static_assert( test_or_assign(16, 3) );
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static_assert( test_or_assign(63, 3) );
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static_assert( test_or_assign(127, 1) );
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static_assert( test_or_assign(255, 2) );
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constexpr bool test_or(unsigned char l, unsigned char r)
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{
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const std::byte b1{l};
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const std::byte b2{r};
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return (b1 | b2) == std::byte(l | r);
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}
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static_assert( test_or(0, 1) );
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static_assert( test_or(0, 1u) );
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static_assert( test_or(0, 1ll) );
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static_assert( test_or(4, 1) );
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static_assert( test_or(9, 2u) );
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static_assert( test_or(16, 3ll) );
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static_assert( test_or(127, 1) );
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static_assert( test_or(255, 2u) );
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static_assert( test_or(63, 3ll) );
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constexpr bool test_and_assign(unsigned char l, unsigned char r)
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{
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std::byte b{l};
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b &= std::byte{r};
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return b == std::byte(l & r);
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}
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static_assert( test_and_assign(0, 1) );
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static_assert( test_and_assign(0, 1u) );
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static_assert( test_and_assign(0, 1ll) );
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static_assert( test_and_assign(4, 1) );
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static_assert( test_and_assign(9, 2u) );
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static_assert( test_and_assign(16, 3ll) );
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static_assert( test_and_assign(127, 1) );
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static_assert( test_and_assign(255, 2u) );
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static_assert( test_and_assign(63, 3ll) );
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constexpr bool test_and(unsigned char l, unsigned char r)
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{
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const std::byte b1{l};
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const std::byte b2{r};
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return (b1 & b2) == std::byte(l & r);
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}
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static_assert( test_and(0, 1) );
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static_assert( test_and(0, 1u) );
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static_assert( test_and(0, 1ll) );
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static_assert( test_and(4, 1) );
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static_assert( test_and(9, 2u) );
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static_assert( test_and(16, 3ll) );
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static_assert( test_and(127, 1) );
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static_assert( test_and(255, 2u) );
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static_assert( test_and(63, 3ll) );
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constexpr bool test_xor_assign(unsigned char l, unsigned char r)
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{
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std::byte b{l};
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b ^= std::byte{r};
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return b == std::byte(l ^ r);
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}
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static_assert( test_xor_assign(0, 1) );
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static_assert( test_xor_assign(0, 1u) );
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static_assert( test_xor_assign(0, 1ll) );
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static_assert( test_xor_assign(4, 1) );
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static_assert( test_xor_assign(9, 2u) );
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static_assert( test_xor_assign(16, 3ll) );
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static_assert( test_xor_assign(127, 1) );
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static_assert( test_xor_assign(255, 2u) );
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static_assert( test_xor_assign(63, 3ll) );
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constexpr bool test_xor(unsigned char l, unsigned char r)
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{
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const std::byte b1{l};
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const std::byte b2{r};
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return (b1 ^ b2) == std::byte(l ^ r);
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}
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static_assert( test_xor(0, 1) );
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static_assert( test_xor(0, 1u) );
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static_assert( test_xor(0, 1ll) );
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static_assert( test_xor(4, 1) );
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static_assert( test_xor(9, 2u) );
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static_assert( test_xor(16, 3ll) );
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static_assert( test_xor(127, 1) );
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static_assert( test_xor(255, 2u) );
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static_assert( test_xor(63, 3ll) );
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constexpr bool test_complement(unsigned char c)
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{
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const std::byte b{c};
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return ~b == std::byte(~c);
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}
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static_assert( test_complement(0) );
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static_assert( test_complement(4) );
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static_assert( test_complement(9) );
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static_assert( test_complement(16) );
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static_assert( test_complement(63) );
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static_assert( test_complement(127) );
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static_assert( test_complement(255) );
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template<typename T>
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constexpr bool test_to_integer(unsigned char c)
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{
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std::byte b{c};
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return std::to_integer<T>(b) == T(c);
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}
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static_assert( test_to_integer<int>(0) );
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static_assert( test_to_integer<int>(255) );
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static_assert( test_to_integer<signed char>(255) );
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static_assert( test_to_integer<unsigned>(0) );
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static_assert( test_to_integer<unsigned>(255) );
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