std::unique_ptr<Investment, decltype(delInvmt)> // return type
makeInvestment(Ts&&... params)
{
// ptr to be returned
std::unique_ptr<Investment, decltype(delInvmt)> pInv (nullptr, delInvmt);
if ( /* a Stock object should be created */ )
{
pInv.reset(new Stock(std::forward<Ts>(params)...));
}
else if ( /* a Bond object should be created */ )
//an example of auto_ptr
void f2(){
std::cout << "f2" << std::endl;
try {
//If you pass a pointer to auto_ptr,
//auto_ptr frees it when the control flow leaves the scope.
std::auto_ptr<Investment> pInv(createInvestment());
throw 1;
} catch (...) {
std::cout << "catch" << std::endl;
}
}
Investment* return_row_ptr()
{
std::auto_ptr<Investment> pInv(createInvestment());
return pInv.get();
}
std::auto_ptr<Investment> return_auto_ptr()
{
std::auto_ptr<Investment> pInv(createInvestment());
return pInv;
}
