unique_ptr.cpp

#include <iostream>
#include <memory>
using namespace std;

struct A {
    void release() { cout << "Release!!" << endl; }
};
struct deleter { void operator()(A* a) { a->release(); } };

unique_ptr<A, deleter> f()
{
    unique_ptr<A, deleter> ptr;
    throw exception("exception");
    return move(ptr);
}

int main(void)
{
    try {
        auto t = f();
    }
    catch (const exception& ex) {
        cout << ex.what() << endl;
    }
    catch (...) {
        throw;
    }
    return 0;
}