95 lines
3.5 KiB
C++
95 lines
3.5 KiB
C++
/*
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//@HEADER
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// ************************************************************************
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//
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// Kokkos v. 3.0
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// Copyright (2020) National Technology & Engineering
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// Solutions of Sandia, LLC (NTESS).
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//
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// Under the terms of Contract DE-NA0003525 with NTESS,
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// the U.S. Government retains certain rights in this software.
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//
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are
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// met:
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//
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// 1. Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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//
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// 2. Redistributions in binary form must reproduce the above copyright
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// notice, this list of conditions and the following disclaimer in the
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// documentation and/or other materials provided with the distribution.
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//
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// 3. Neither the name of the Corporation nor the names of the
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// contributors may be used to endorse or promote products derived from
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// this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY NTESS "AS IS" AND ANY
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// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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// PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL NTESS OR THE
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// CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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// EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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// PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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// LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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// NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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//
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// Questions? Contact Christian R. Trott (crtrott@sandia.gov)
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//
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// ************************************************************************
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//@HEADER
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*/
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#include <Kokkos_DetectionIdiom.hpp>
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#define STATIC_ASSERT(cond) static_assert(cond, "");
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void test_nonesuch() {
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using Kokkos::nonesuch;
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STATIC_ASSERT(!std::is_constructible<nonesuch>::value);
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STATIC_ASSERT(!std::is_destructible<nonesuch>::value);
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STATIC_ASSERT(!std::is_copy_constructible<nonesuch>::value);
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STATIC_ASSERT(!std::is_move_constructible<nonesuch>::value);
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#ifdef KOKKOS_ENABLE_CXX17
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STATIC_ASSERT(!std::is_aggregate<nonesuch>::value);
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#endif
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}
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#undef STATIC_ASSERT
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namespace Example {
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// Example from https://en.cppreference.com/w/cpp/experimental/is_detected
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template <class T>
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using copy_assign_t = decltype(std::declval<T&>() = std::declval<const T&>());
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struct Meow {};
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struct Purr {
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void operator=(const Purr&) = delete;
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};
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static_assert(Kokkos::is_detected<copy_assign_t, Meow>::value,
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"Meow should be copy assignable!");
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static_assert(!Kokkos::is_detected<copy_assign_t, Purr>::value,
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"Purr should not be copy assignable!");
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static_assert(Kokkos::is_detected_exact<Meow&, copy_assign_t, Meow>::value,
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"Copy assignment of Meow should return Meow&!");
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template <class T>
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using diff_t = typename T::difference_type;
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template <class Ptr>
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using difference_type = Kokkos::detected_or_t<std::ptrdiff_t, diff_t, Ptr>;
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struct Woof {
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using difference_type = int;
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};
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struct Bark {};
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static_assert(std::is_same<difference_type<Woof>, int>::value,
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"Woof's difference_type should be int!");
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static_assert(std::is_same<difference_type<Bark>, std::ptrdiff_t>::value,
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"Bark's difference_type should be ptrdiff_t!");
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} // namespace Example
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