exception

问题 #include <exception> struct FOO { ~FOO() try { throw std::exception(); } catch (...) { return; // Shall prevent the exception from being rethrown? } }; Building this code in Visual Studio triggers C4297 warning (function assumed not to throw an exception but does). Reaching the end of a catch clause for a function-try-block on a destructor also automatically rethrows the current exception as if by throw;, but a return statement is allowed . quoted from cppreference.com; Do I interpret this

问题 This question already has an answer here : Constructor with by-value parameter & noexcept (1 answer) Closed 1 year ago . Assume I have this function void foo() noexcept { // Safely noexcept code. } And then this class: class Bar { Bar(const Bar&) { ... } // Is not noexcept, so might throw // Non movable: Bar(Bar&&) = delete; }; Now, I need to modify foo() to receive a Bar by value: void foo(Bar bar) // noexcept? { // Safely noexcept code } I assume the copy of Bar is done before the call to

问题 Laravel has readable log and stacktrace when exception caught, for example: production.ERROR: Command "test" is not defined. Did you mean this? make:test {"exception":"[object] (Symfony\\Component\\Console\\Exception\\CommandNotFoundException(code: 0): Command \"test\" is not defined. Did you mean this? make:test at {root}/vendor/symfony/console/Application.php:618) [stacktrace] #0 {root}/vendor/symfony/console/Application.php(229): Symfony\\Component\\Console\\Application->find('test') #1

问题 Laravel has readable log and stacktrace when exception caught, for example: production.ERROR: Command "test" is not defined. Did you mean this? make:test {"exception":"[object] (Symfony\\Component\\Console\\Exception\\CommandNotFoundException(code: 0): Command \"test\" is not defined. Did you mean this? make:test at {root}/vendor/symfony/console/Application.php:618) [stacktrace] #0 {root}/vendor/symfony/console/Application.php(229): Symfony\\Component\\Console\\Application->find('test') #1

问题 I've always wondered how the Haskell exception system fits in with the whole "Pure functional language" thing. For example see the below GHCi session. GHCi, version 8.0.1: http://www.haskell.org/ghc/ :? for help Prelude> head [] *** Exception: Prelude.head: empty list Prelude> :t head head :: [a] -> a Prelude> :t error error :: [Char] -> a Prelude> error "ranch" *** Exception: ranch CallStack (from HasCallStack): error, called at <interactive>:4:1 in interactive:Ghci1 Prelude> The type of

问题 When exactly we should use this method. On JedisConnectionException, JedisDataException or for any JedisException. There is no good API documentation for Jedis to my knowledge. try { Jedis jedis = JedisFactory.getInstance(); Pipeline pipe = jedis.pipelined(); Response<Set<Tuple>> idWithScore = pipe.zrangeWithScores(cachekey, from, to); **// some statement which may cause some other exception** Response<String> val = pipe.get(somekey); pipe.exec(); pipe.sync(); }catch (JedisConnectionException

问题 Suppose I have a very simple function that I expect the compiler to inline it. But I may need to throw exception on seeing some invalid input, would that stop the compiler from inlining the function? 回答1: A compiler can refuse to inline for any reason. gcc lists reasons why it might not inline a function, but exception throwing is not among them. Also, the option -Winline will cause the compiler to issue a warning if it can't inline a function that you marked as inline. You can try that and

问题 Suppose I have a very simple function that I expect the compiler to inline it. But I may need to throw exception on seeing some invalid input, would that stop the compiler from inlining the function? 回答1: A compiler can refuse to inline for any reason. gcc lists reasons why it might not inline a function, but exception throwing is not among them. Also, the option -Winline will cause the compiler to issue a warning if it can't inline a function that you marked as inline. You can try that and

问题 In my app, I have Fragment which is inside ViewPager. Fragment contains RecyclerView with list of data fetched from web api based on user selection. On my Fragment onSaveInstanceState I save list data to Bunde, to keep the data on configuration changes etc. public void onSaveInstanceState(Bundle savedState) { super.onSaveInstanceState(savedState); savedState.putParcelableArrayList(LIST_STORAGE_KEY, new ArrayList<>(mItemAdapter.getModels())); } Now I have started to see

问题 I use Jersey API for my REST service. My question is: Is there a more elegant way of returning exceptions in a JSON form? Is it better to concern myself with creating a json object myself and attaching it to the response directly? This is a simplified example of one of the methods in the service. As you see, I use HashMap only because the method may throw an exception, in which case I need to return information about It. @Path("/admin") public class AdminService { @Context HttpServletRequest