types.h

// Copyright (C) 2023 Garth N. Wells
//
// This file is part of DOLFINx (https://www.fenicsproject.org)
//
// SPDX-License-Identifier:    LGPL-3.0-or-later
 
#pragma once
 
#include <complex>
#include <concepts>
#include <type_traits>
 
namespace dolfinx
{
template <class T>
concept scalar
    = std::is_floating_point_v<T> || std::is_same_v<T, std::complex<double>>
      || std::is_same_v<T, std::complex<float>>;
template <scalar T, typename = void>
struct scalar_value_type
{
  typedef T value_type;
};
template <scalar T>
struct scalar_value_type<T, std::void_t<typename T::value_type>>
{
  typedef typename T::value_type value_type;
};
template <scalar T>
using scalar_value_type_t = typename scalar_value_type<T>::value_type;
} // namespace dolfinx