basic.hpp

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// -----------------------------------------------------------------------------------------------------
// Copyright (c) 2022 deCODE Genetics
// Copyright (c) 2006-2020, Knut Reinert & Freie Universität Berlin
// Copyright (c) 2016-2020, Knut Reinert & MPI für molekulare Genetik
// This file may be used, modified and/or redistributed under the terms of the 3-clause BSD-License
// shipped with this file and also available at: https://github.com/biocpp/biocpp-core/blob/main/LICENSE.md
// -----------------------------------------------------------------------------------------------------
 
#pragma once
 
#include <tuple>
#include <type_traits>
 
#include <bio/meta/concept/core_language.hpp>
 
namespace bio::meta
{
 
// ----------------------------------------------------------------------------
// default_initialisable_wrap_t
// ----------------------------------------------------------------------------
 
template <typename t>
using default_initialisable_wrap_t =
  std::conditional_t<std::is_nothrow_default_constructible_v<std::remove_cvref_t<t>> &&
                       constexpr_default_initializable<std::remove_cvref_t<t>>,
                     std::remove_cvref_t<t>,
                     std::type_identity<std::remove_cvref_t<t>>>;
 
// ----------------------------------------------------------------------------
// ignore_t
// ----------------------------------------------------------------------------
 
using ignore_t = std::remove_cvref_t<decltype(std::ignore)>;
 
template <typename t>
inline constexpr bool decays_to_ignore_v = std::is_same_v<std::remove_cvref_t<t>, ignore_t>;
 
// ----------------------------------------------------------------------------
// always_false
// ----------------------------------------------------------------------------
 
template <typename... t>
inline constexpr bool always_false = false;
 
 
} // namespace bio::meta