WebAug 26, 2008 · MyBase *base = new MyBase (); MyChild *child = dynamic_cast (base); if (child == 0) std::cout << "Null pointer returned"; If a reference is converted instead of a pointer, the dynamic cast will then fail by throwing a bad_cast exception. This needs to be handled using a try-catch statement. WebDec 6, 2024 · 1) Default constructor. 2) Copy constructor. If *this and other both have dynamic type std::bad_any_cast then std::strcmp(what(), other.what()) == 0. Parameters other - another exception object to copy std::bad_any_cast::operator= Assigns the contents with those of other.

c++ - bad_any_cast exception when returning string from …

WebThe exception that may be caught by the exception handler in this example is a bad_alloc. Because bad_alloc is derived from the standard base class exception, it can be caught (capturing by reference, captures all related classes). Previous: Type conversions Next: Preprocessor directives Web1) Default constructor. 2) Copy constructor. If *this and other both have dynamic type std::bad_any_cast then std::strcmp(what(), other.what()) == 0. Parameters other - … the pinnacle and pulpit rock hamburg

std::exception - cppreference.com

WebMar 22, 2024 · Throws std::bad_any_cast if the typeid of the requested ValueType does not match that of the contents of operand. Since typeid doesn't allow the implementation to "figure out" an implicit conversion is possible, there's no way (to my knowledge) that any_cast can know it's possible either. WebBut let's assume it is just some big number - you allocate memory of unspecified size (possibly just very big size), hence the std::bad_alloc exception - it means you want to allocate more memory that you have available. Also, matrix is VLA of unspecified size, which is both non-standard and Undefined behaviour. Share Improve this answer Follow side effects of annovera