On Friday 17 September 2010 19:56:30 John Bytheway wrote:
On 17/09/10 11:37, Yakov Galka wrote:
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).
You could check the function in the constructor of the underlying C++ object, too, in order to detect transitions. That said, the killer phrases for me are these: Martin Christiansson wrote:
GUARDED_SCOPE_SUCCESS() will only run if the function is exited with wrapper for return keyword (GUARDED_SCOPE_RETURN). The wrapper must be used since it updates the hidden guard variables. Using plain "return" will behave as if exception was thrown.
Having to use a big and ugly macro is too intrusive, signaling failure when returning normally is just wrong. Uli