107 lines
2.7 KiB
C++
107 lines
2.7 KiB
C++
/*
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* Cppcheck - A tool for static C/C++ code analysis
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* Copyright (C) 2007-2023 Cppcheck team.
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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//---------------------------------------------------------------------------
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#ifndef valueptrH
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#define valueptrH
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//---------------------------------------------------------------------------
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#include "config.h"
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#include <memory>
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template<class T>
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class CPPCHECKLIB ValuePtr {
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template<class U>
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struct cloner {
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static T* apply(const T* x) {
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return new U(*static_cast<const U*>(x));
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}
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};
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public:
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using pointer = T*;
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using element_type = T;
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using cloner_type = decltype(&cloner<T>::apply);
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ValuePtr() : mPtr(nullptr), mClone() {}
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template<class U>
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// cppcheck-suppress noExplicitConstructor
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// NOLINTNEXTLINE(google-explicit-constructor)
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ValuePtr(const U& value) : mPtr(cloner<U>::apply(&value)), mClone(&cloner<U>::apply)
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{}
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ValuePtr(const ValuePtr& rhs) : mPtr(nullptr), mClone(rhs.mClone) {
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if (rhs) {
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mPtr.reset(mClone(rhs.get()));
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}
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}
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ValuePtr(ValuePtr&& rhs) NOEXCEPT : mPtr(std::move(rhs.mPtr)), mClone(std::move(rhs.mClone)) {}
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/**
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* Releases the shared_ptr's ownership of the managed object using the .reset() function
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*/
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void release() {
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mPtr.reset();
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}
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T* get() NOEXCEPT {
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return mPtr.get();
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}
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const T* get() const NOEXCEPT {
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return mPtr.get();
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}
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T& operator*() {
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return *get();
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}
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const T& operator*() const {
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return *get();
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}
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T* operator->() NOEXCEPT {
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return get();
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}
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const T* operator->() const NOEXCEPT {
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return get();
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}
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void swap(ValuePtr& rhs) {
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using std::swap;
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swap(mPtr, rhs.mPtr);
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swap(mClone, rhs.mClone);
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}
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ValuePtr<T>& operator=(ValuePtr rhs) {
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swap(rhs);
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return *this;
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}
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// NOLINTNEXTLINE(google-explicit-constructor)
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operator bool() const NOEXCEPT {
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return !!mPtr;
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}
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private:
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std::shared_ptr<T> mPtr;
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cloner_type mClone;
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};
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#endif
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