std::bad_cast
From Cppreference
| Defined in header <typeinfo>
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| class bad_cast : public std::exception;
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An exception of this type is thrown when a dynamic_cast to a reference type fails the run-time check (e.g. because the types are not related by inheritance).
Contents |
[edit] Member functions
| constructs a new bad_cast object (public member function) |
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Inherited from std::exception
Member functions
| [virtual]
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destructs the exception object (virtual public member function of std::exception) |
| [virtual]
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returns explanatory string (virtual public member function of std::exception) |
[edit] Example
#include <iostream> #include <typeinfo> struct Foo { virtual void f() {} }; struct Bar { virtual void f() {} }; int main() { Bar b; try { Foo& f = dynamic_cast<Foo&>(b); } catch(const std::bad_cast& e) { std::cout << e.what() << '\n'; } }
Output:
Bad dynamic_cast!