is_scalar.hpp

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// SPDX-License-Identifier: BSL-1.0
// SPDX-FileCopyrightText: Copyright (C) 2019 Tobias Hienzsch
 
#ifndef TETL_TYPE_TRAITS_IS_SCALAR_HPP
#define TETL_TYPE_TRAITS_IS_SCALAR_HPP
 
#include <etl/_config/all.hpp>
 
#include <etl/_type_traits/bool_constant.hpp>
#include <etl/_type_traits/is_arithmetic.hpp>
#include <etl/_type_traits/is_enum.hpp>
#include <etl/_type_traits/is_member_pointer.hpp>
#include <etl/_type_traits/is_null_pointer.hpp>
#include <etl/_type_traits/is_pointer.hpp>
 
namespace etl {
 
/// \brief If T is a scalar type (that is a possibly cv-qualified arithmetic,
/// pointer, pointer to member, enumeration, or etl::nullptr_t type), provides
/// the member constant value equal true. For any other type, value is false.
template <typename T>
struct is_scalar;
 
#if __has_builtin(__is_scalar)
 
template <typename T>
struct is_scalar : bool_constant<__is_scalar(T)> { };
 
template <typename T>
 
inline constexpr bool is_scalar_v = __is_scalar(T);
#else
 
template <typename T>
struct is_scalar
    : bool_constant<
          is_arithmetic_v<T> or is_enum_v<T> or is_pointer_v<T> or is_member_pointer_v<T> or is_null_pointer_v<T>
      > { };
 
template <typename T>
 
inline constexpr bool is_scalar_v = is_scalar<T>::value;
 
#endif
 
} // namespace etl
 
#endif // TETL_TYPE_TRAITS_IS_SCALAR_HPP