JuniorTheoryCommon

What does the program print?

C++

#include <iostream>

struct Error {};
struct NotFound : public Error {};

int main() {
    try { throw NotFound{}; }
    catch (const Error&) { std::cout << "Error"; }
    catch (const NotFound&) { std::cout << "NotFound"; }
}

Error

Expecting NotFound: handlers are tried from top to bottom, not by the best match, and const Error& already accepts a NotFound.
Expecting a compile error: a handler that can never run draws only a warning, and the program builds.

How would you reorder the handlers so that a NotFound gets its own message?
Where in the list of handlers does catch (...) go, and why?

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JuniorTheoryCommon

What does the program print?

C++

#include <iostream>

struct Error {};
struct NotFound : public Error {};

int main() {
    try { throw NotFound{}; }
    catch (const Error&) { std::cout << "Error"; }
    catch (const NotFound&) { std::cout << "NotFound"; }
}

Error

Expecting NotFound: handlers are tried from top to bottom, not by the best match, and const Error& already accepts a NotFound.
Expecting a compile error: a handler that can never run draws only a warning, and the program builds.

How would you reorder the handlers so that a NotFound gets its own message?
Where in the list of handlers does catch (...) go, and why?

Back to questions Open topic in roadmap →Answer it yourself — Quiz