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CopyablePtr.hpp
/*
Copyright 2022 Equinor ASA.
This file is part of the Open Porous Media project (OPM).
OPM is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
OPM is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with OPM. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef OPM_COPYABLE_PTR_HPP
#define OPM_COPYABLE_PTR_HPP
namespace Opm {
namespace Utility {
// Wraps std::unique_ptr and makes it copyable.
//
// WARNING: This template should not be used with polymorphic classes.
// That would require a virtual clone() method to be implemented.
// It will only ever copy the static class type of the pointed to class.
template <class T>
class CopyablePtr {
public:
CopyablePtr() : ptr_(nullptr) {}
CopyablePtr(const CopyablePtr& other) {
if (other) { // other does not contain a nullptr
ptr_ = std::make_unique<T>(*other.get());
}
else {
ptr_ = nullptr;
}
}
// assignment operator
CopyablePtr<T>& operator=(const CopyablePtr<T>& other) {
if (other) {
ptr_ = std::make_unique<T>(*other.get());
}
else {
ptr_ = nullptr;
}
return *this;
}
// assign directly from a unique_ptr
CopyablePtr<T>& operator=(std::unique_ptr<T>&& uptr) {
ptr_ = std::move(uptr);
return *this;
}
// member access operator
T* operator->() const {return ptr_.get(); }
// boolean context operator
explicit operator bool() const noexcept {
return ptr_ ? true : false;
}
// get a pointer to the stored value
T* get() const {return ptr_.get();}
T* release() const {return ptr_.release();}
private:
std::unique_ptr<T> ptr_;
};
} // namespace Utility
} // namespace Opm
#endif
Opm::Utility::CopyablePtr
Definition CopyablePtr.hpp:30
Opm
This class implements a small container which holds the transmissibility mulitpliers for all the face...
Definition Exceptions.hpp:30