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#include "../EnableSharedFromThis.h"
#include "../SmartPtrBuilder.h"
#include <memory>
#include <iostream>
using namespace Generic;
class Base;
class Derived;
void FuncBase(std::shared_ptr< Base > iBase);
void FuncDerived(std::shared_ptr< Derived > iDerived);
class Base : public EnableSharedFromThis< Base >
{
public:
Base(int iValue) : mValue(iValue) {}
void BaseFunc()
{
FuncBase(EnableSharedFromThis< Base >::SharedFromThis());
}
void PrintValue()
{
std::cout << "Value = " << mValue << std::endl;
}
private:
int mValue;
};
class Derived : public Base, public EnableSharedFromThis< Derived >
{
public:
// Factory method
static std::shared_ptr< Derived > Create(int iValue)
{
return SmartPtrBuilder::CreateSharedPtr< Derived, Base >(new Derived(iValue));
}
void DerivedFunc()
{
FuncDerived(EnableSharedFromThis< Derived >::SharedFromThis());
}
private:
Derived(int iValue) : Base(iValue) {}
};
void FuncBase(std::shared_ptr< Base > iBase)
{
iBase->PrintValue();
}
void FuncDerived(std::shared_ptr< Derived > iDerived)
{
iDerived->PrintValue();
}
int main()
{
// Simply use the factory method to instanciate Derived
std::shared_ptr< Derived > wDerived = Derived::Create(123);
// One or both of the following would crash if using the original std::enable_shared_from_this
wDerived->BaseFunc();
wDerived->DerivedFunc();
return 0;
}
// Copyright (C) 2011 by Philippe Cayouette
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
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