EvgenyLPanasyuk

P.S. I like the alternative approach defined in https://github.com/panaseleus/stack_unwinding even if the code is not completely portable in C++11.

Yes, it based on top of platform-specific implementation of uncaught_exception_count.

However, I made it work on all platforms I have access to - MSVC, GCC, Clang ( see full list at github readme ).

And I think it should be easy to implement it on other platforms, because info about current exceptions in flight should be stored somewhere.

By the way, at 1:18:10 Andrei mentioned that he would accept GCC only solution.

I have implemented scope(failure) and scope(success) in C++. https://github.com/panaseleus/stack_unwinding
I.e. ScopeGuard without need to call .dismiss() manually.

For example:

try
{
    int some_var=1; // some_var is just for example of capturing,
    // but not requirement
    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){}