exception

问题 This question already has answers here : Closed 8 years ago . Possible Duplicate: When is a function try block useful? Difference between try-catch syntax for function This code throws an int exception while constructing the Dog object inside class UseResources . The int exception is caught by a normal try-catch block and the code outputs : Cat() Dog() ~Cat() Inside handler #include <iostream> using namespace std; class Cat { public: Cat() { cout << "Cat()" << endl; } ~Cat() { cout << "~Cat()

问题 When debugging using Visual Studio 2012 RC with break on exception turned on, Visual Studio breaks on exceptions from within the .NET Framework. How do I make it break on exceptions only in my code? When debugging a ASP.NET MVC 4 project there are a lot of framework exceptions thrown on every page hit. The following exception happens a lot: System.Globalization.CultureNotFoundException occurred HResult=-2147024809 Message=Culture is not supported. Parameter name: name UserCache is an invalid

问题 I have the following code: class Program { static void Main(string[] args) { string xml = @"<ArrayOfUserSetting> <UserSetting> <Value>Proposals</Value> <Name>LastGroup</Name> </UserSetting> <UserSetting> <Value>Visible</Value> <Name>WidgetsVisibility</Name> </UserSetting> </ArrayOfUserSetting>"; List<UserSetting> settings = GetObjFromXmlDocument<List<UserSetting>>(xml); } public static T GetObjFromXmlDocument<T>(string xml) { T customType; XmlSerializer serializer = new XmlSerializer(typeof(T

问题 I have the following code: class Program { static void Main(string[] args) { string xml = @"<ArrayOfUserSetting> <UserSetting> <Value>Proposals</Value> <Name>LastGroup</Name> </UserSetting> <UserSetting> <Value>Visible</Value> <Name>WidgetsVisibility</Name> </UserSetting> </ArrayOfUserSetting>"; List<UserSetting> settings = GetObjFromXmlDocument<List<UserSetting>>(xml); } public static T GetObjFromXmlDocument<T>(string xml) { T customType; XmlSerializer serializer = new XmlSerializer(typeof(T

问题 $ ./runtests.py -v tests/managers/test_customer.py:CustomerManagerTest.test_register_without_subscription --ipdb ... test_register_without_subscription (tests.managers.test_customer.CustomerManagerTest) ... - TRACEBACK -------------------------------------------------------------------- Traceback (most recent call last): File "/usr/lib/python2.7/unittest/case.py", line 331, in run testMethod() File "*****/tests/managers/test_customer.py", line 198, in test_register_without_subscription 1/0

问题 This is considered typical - (id)init { self = [super init]; if (self) { // <#initializations#> } return self; } but wouldn't it be better to go with something like this which actually responds appropriately? - (id)init { self = [super init]; if (self) { // <#initializations#> } else { @throw [NSException exceptionWithName:NSInternalInconsistencyException reason:@"you think your constructor is executing, but it's not"] userInfo:nil] } return self; } The corollary to this question is, "under

问题 The following code is generating the "Looser throw specifier error". Could you please help me to overcome this error? class base { virtual void abc() throw (exp1); } void base::abc() throw (exp1) { ...... } class sub : public base { void abc() throw(exp1, exp2); } void sub::abc() throw (exp1, exp2) { ..... } 回答1: The problem comes about because the subclass must be usable wherever the base class can be used, and so must not throw any exception types other than those specified in the base

问题 I see the following constructs: new X will free the memory if X constructor throws. operator new() can be overloaded. The canonical definition of an operator new overload is void *operator new(size_t c, heap h) and the corresponding operator delete . The most common operator new overload is placement new, which is void *operator new(void *p) { return p; } You almost always cannot call delete on the pointer given to placement new . This leads to a single question: How is memory cleaned up when

问题 I see the following constructs: new X will free the memory if X constructor throws. operator new() can be overloaded. The canonical definition of an operator new overload is void *operator new(size_t c, heap h) and the corresponding operator delete . The most common operator new overload is placement new, which is void *operator new(void *p) { return p; } You almost always cannot call delete on the pointer given to placement new . This leads to a single question: How is memory cleaned up when

问题 I see the following constructs: new X will free the memory if X constructor throws. operator new() can be overloaded. The canonical definition of an operator new overload is void *operator new(size_t c, heap h) and the corresponding operator delete . The most common operator new overload is placement new, which is void *operator new(void *p) { return p; } You almost always cannot call delete on the pointer given to placement new . This leads to a single question: How is memory cleaned up when