// This tests hard situations for throwing, including the case where an // exception is active in more than one handler at a time (ie, it needs // refcounting) #include struct foo { int i; foo() : i(1) { } foo(const foo&) : i(2) {} }; int callee(unsigned i) { if (i < 3) throw (int)i; if (i < 6) throw 1.0; if (i < 9) throw foo(); return 0; } void rethrow() { throw; } int main() { for (unsigned i = 0; i < 10; ++i) { try { return callee(i); } catch (foo &F) { try { rethrow(); } catch (foo &F) { std::printf("%d: 3\n", i); } } catch (int) { std::printf("%d: 1\n", i); } catch (...) { std::printf("%d: 2\n", i); } } }