Re: [boost] D-style scope guards?

17 Sep 2010


      On 17/09/10 11:37, Yakov Galka wrote:
...
Why don't you use std::uncaught_exception() instead of exception_thrown?
Also in my opinion this is a cleaner solution:
void foo()
{
    BOOST_SCOPE_EXIT(empty capture list not supported yet)
        cout << "Returning from foo()" << endl;
        if(!std::uncaught_exception())
            cout << "foo(): No Errors occurred!" << endl;
        else
            cout << "foo(): Exception caught!" << endl;
    BOOST_SCOPE_EXIT_END
    // ...
}
That won't work in general; std::uncaught_exception might return true
because of another pending exception that's going on 'outside' of foo()
(e.g. if foo() is called from a destructor).

For more details:
http://www.gotw.ca/gotw/047.htm

John Bytheway