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containerconstructiontraits.hh
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// -*- tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*-
// vi: set et ts=4 sw=2 sts=2:
// SPDX-FileCopyrightInfo: Copyright © DUNE Project contributors, see file LICENSE.md in module root
// SPDX-License-Identifier: LicenseRef-GPL-2.0-only-with-DUNE-exception
#ifndef DUNE_COMMON_STD_IMPL_CONTAINER_CONSTRUCTION_TRAITS_HH
#define DUNE_COMMON_STD_IMPL_CONTAINER_CONSTRUCTION_TRAITS_HH
#include <array>
#include <cassert>
#include <cstddef>
namespace Dune::Std {
namespace Impl {
template <class Container>
struct ContainerConstructionTraits
{
using container_type = Container;
using value_type = typename container_type::value_type;
static constexpr container_type construct (std::size_t size)
{
return container_type(size);
}
static constexpr container_type construct (std::size_t size, value_type value)
{
return container_type(size, value);
}
};
template <class Value, std::size_t N>
struct ContainerConstructionTraits<std::array<Value,N>>
{
using container_type = std::array<Value,N>;
using value_type = typename container_type::value_type;
static constexpr container_type construct ([[maybe_unused]] std::size_t size)
{
assert(size <= N);
return container_type{};
}
static constexpr container_type construct ([[maybe_unused]] std::size_t size, value_type value)
{
assert(size <= N);
container_type c{};
for (auto& c_i : c)
c_i = value;
return c;
}
};
} // end namespace Impl
} // end namespace Dune::Std
#endif // DUNE_COMMON_STD_IMPL_CONTAINER_CONSTRUCTION_TRAITS_HH
Dune::size
constexpr std::integral_constant< std::size_t, sizeof...(II)> size(std::integer_sequence< T, II... >)
Return the size of the sequence.
Definition integersequence.hh:75
Dune::Std
Namespace for features backported from new C++ standards.
Definition algorithm.hh:19