Re: In a destructor, how to detect if an exception is currently in flight?

I didn't see how it could be generalized but your example clears that up. - Erik 2015-10-28 15:40 GMT+01:00 Rowan Collins <rowan.collins@gmail.com>: > > Did you see Johannes' suggestion re explicit success vs implicit failure? > > $scope = new ScopeGuard; > > $scope->onSucces(function() { logTransactionOne(); }); > $scope->onFailure(function() { rollbackTransationOne(); }); > doTransactionOne(); > > $scope->onSuccess(function() { logTransactionTwo(); }); > $scope->onFailure(function() { rollbackTransactionTwo(); }); > $scope->onExit(function() { cleanupTransactionTwo(); }); > doTransactionTwo(); > > $scope->registerSuccess(); > > > The ScopeGuard's destructor can now detect the condition: > > if ( $this->success_registered ) { > // Function reached checkpoint for this scope > $this->callSuccessHandlers(); > } else { > // Function aborted early, due to a throw or early return > $this->callExitHandlers(); > } > $this->callExitHandlers(); > > > No boilerplate throw-catch needed, works even if there is already a catch or > finally within the function's definition. > > In fact, I kind of want to use this somewhere now... ;) > > Regards, > -- > Rowan Collins > [IMSoP] >