try
{
    int some_var=1;
    cout << "Case #1: stack unwinding" << endl;
    scope(exit)
    {
        cout << "exit " << some_var << endl;
        ++some_var;
    };
    scope(failure)
    {
        cout << "failure " << some_var  << endl;
        ++some_var;
    };
    scope(success)
    {
        cout << "success " << some_var  << endl;
        ++some_var;
    };
    throw 1;
} catch(int){}

https://github.com/panaseleus/stack_unwinding#d-style-scope-guardsactions
https://github.com/panaseleus/stack_unwinding/blob/master/examples/example_from_dlang_dot_org.cpp
https://github.com/panaseleus/stack_unwinding/blob/master/examples/boost_scopes.cpp
https://github.com/panaseleus/stack_unwinding/blob/master/examples/boost_scopes_cpp11.cpp