Exceptions in destructors

In C++11 destructors default to noexcept so you have to go out of your way to make them throw. See throwing exceptions in a destructor.

You can throw an exception in a destructor, but that exception must not leave the destructor; if a destructor exits by emitting an exception, all kinds of bad things are likely to happen because the basic rules of the standard library and the language itself will be violated. Don’t do it. https://isocpp.org/wiki/faq/exceptions#ctor-exceptions

#include <exception>
#include <iostream>
#include <vector>

// Note the braces
void exception1() try { throw 1; } catch (int e) {
std::cout << "Caught " << e << std::endl;
} catch (const std::out_of_range &oor) {
std::cout << "Caught OORn" << oor.what() << std::endl;
} catch (const std::exception &e) {
std::cout << "Caught " << e.what() << std::endl;
} catch (...) {
std::cout << "Caught ellipsis" << std::endl;
}

void exception2() {

using namespace std;

// Simple
try {
throw 2;
} catch (int e) {
cout << "Caught exception " << e << endl;
}

try {
vector<int> vec(5);
vec.at(6);
} catch (exception &e) {
cout << "Caught exception " << e.what() << endl;
}
}

int main() {

exception1();
exception2();
}