pointers.h

/*****************************************************************************
 * VCLib                                                                     *
 * Visual Computing Library                                                  *
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 * Copyright(C) 2021-2025                                                    *
 * Visual Computing Lab                                                      *
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#ifndef VCL_CONCEPTS_POINTERS_H
#define VCL_CONCEPTS_POINTERS_H
 
#include "const_correctness.h"
 
#include <memory>
 
namespace vcl {
 
namespace detail {
 
template<typename T>
struct IsSharedPtr : std::false_type
{
};
 
template<typename T>
struct IsSharedPtr<std::shared_ptr<T>> : std::true_type
{
};
 
} // namespace detail
 
template<typename T>
concept IsPointer = std::is_pointer_v<RemoveRef<T>>;
 
template<typename T>
concept IsSharedPointer = detail::IsSharedPtr<T>::value;
 
template<typename T>
concept IsAnyPointer = IsPointer<T> || IsSharedPointer<T>;
 
template<typename T>
concept IsPointerToConst = IsPointer<T> && IsConst<T>;
 
template<typename T>
concept IsSharedPointerToConst =
    IsSharedPointer<T> && IsConst<typename T::element_type>;
 
template<typename T>
concept IsAnyPointerToConst = IsPointerToConst<T> || IsSharedPointerToConst<T>;
 
} // namespace vcl
 
#endif // VCL_CONCEPTS_POINTERS_H