606dda21c8
* doc/xml/manual/status_cxx2017.xml: Update gcd/lcm status. * doc/html/*: Regenerate. * include/experimental/numeric (__abs): Move to <numeric>. (gcd, lcm): Use __detail::gcd and __detail::lcm. * include/std/numeric (__detail::__abs_integral) (__detail::__gcd, __detail::__lcm): Define. (gcd, lcm): Define for C++17. * testsuite/26_numerics/gcd/1.cc: New test. * testsuite/26_numerics/lcm/1.cc: New test. * testsuite/experimental/numeric/gcd.cc: Swap contents with ... * testsuite/experimental/numeric/lcd.cc: ... this. From-SVN: r240723
42 lines
1.5 KiB
C++
42 lines
1.5 KiB
C++
// Copyright (C) 2015-2016 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++1z" }
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// { dg-do compile { target c++1z } }
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#include <numeric>
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#ifndef __cpp_lib_lcm
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# error "Feature-test macro for lcm missing"
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#elif __cpp_lib_lcm != 201606
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# error "Feature-test macro for lcm has wrong value"
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#endif
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using std::lcm;
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static_assert(lcm(21, 6) == 42, "");
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static_assert(lcm(41, 0) == 0, "LCD with zero is zero");
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static_assert(lcm(0, 7) == 0, "LCD with zero is zero");
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static_assert(lcm(0, 0) == 0, "no division by zero");
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static_assert(lcm(1u, 2) == 2, "unsigned and signed");
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static_assert(lcm(3, 4u) == 12, "signed and unsigned");
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static_assert(lcm(5u, 6u) == 30, "unsigned and unsigned");
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static_assert( std::is_same_v<decltype(lcm(1l, 1)), long> );
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static_assert( std::is_same_v<decltype(lcm(1ul, 1ull)), unsigned long long> );
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