Mercurial > hg > CbC > CbC_gcc
view libstdc++-v3/testsuite/26_numerics/bit/bit.pow.two/bit_ceil_neg.cc @ 152:2b5abeee2509
update gcc11
author | anatofuz |
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date | Mon, 25 May 2020 07:50:57 +0900 |
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// Copyright (C) 2019-2020 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-options "-std=gnu++2a -D_GLIBCXX_ASSERTIONS" } // { dg-do run { target c++2a } } // { dg-xfail-run-if "__glibcxx_assert in bit_ceil should fail" { *-*-* } } #include <bit> #include <limits> // P1355R2: not a constant expression if the result is not representable template<auto N, typename = void> struct bit_ceil_valid : std::false_type { }; template<auto N> struct bit_ceil_valid<N, std::void_t<char[(std::bit_ceil(N), 1)]>> : std::true_type { }; template<typename T> constexpr T max = std::numeric_limits<T>::max(); template<typename T> constexpr T maxpow2 = T(1) << (std::numeric_limits<T>::digits - 1); static_assert( bit_ceil_valid<maxpow2<unsigned char>>() ); static_assert( !bit_ceil_valid<maxpow2<unsigned char> + (unsigned char)1>() ); static_assert( !bit_ceil_valid<max<unsigned char>>() ); static_assert( !bit_ceil_valid<max<unsigned char> - (unsigned char)1>() ); static_assert( bit_ceil_valid<maxpow2<unsigned short>>() ); static_assert( !bit_ceil_valid<maxpow2<unsigned short> + (unsigned short)1>() ); static_assert( !bit_ceil_valid<max<unsigned short>>() ); static_assert( !bit_ceil_valid<max<unsigned short> - (unsigned short)1>() ); static_assert( bit_ceil_valid<maxpow2<unsigned int>>() ); static_assert( !bit_ceil_valid<maxpow2<unsigned int> + 1u>() ); static_assert( !bit_ceil_valid<max<unsigned int>>() ); static_assert( !bit_ceil_valid<max<unsigned int> - 1u>() ); static_assert( bit_ceil_valid<maxpow2<unsigned long>>() ); static_assert( !bit_ceil_valid<maxpow2<unsigned long> + 1ul>() ); static_assert( !bit_ceil_valid<max<unsigned long>>() ); static_assert( !bit_ceil_valid<max<unsigned long> - 1ul>() ); static_assert( bit_ceil_valid<maxpow2<unsigned long long>>() ); static_assert( !bit_ceil_valid<maxpow2<unsigned long long> + 1ull>() ); static_assert( !bit_ceil_valid<max<unsigned long long>>() ); static_assert( !bit_ceil_valid<max<unsigned long long> - 1ull>() ); void test01() { std::bit_ceil( maxpow2<unsigned> + 1u ); // should fail __glibcxx_assert } int main() { test01(); }