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// throw_with_nested/rethrow_if_nested example
#include <iostream> // std::cerr
#include <exception> // std::exception, std::throw_with_nested, std::rethrow_if_nested
#include <stdexcept> // std::logic_error
// recursively print exception whats:
void print_what (const std::exception& e) {
std::cerr << e.what() << '\n';
try {
std::rethrow_if_nested(e);
} catch (const std::exception& nested) {
std::cerr << "nested: ";
print_what(nested);
}
}
// throws an exception nested in another:
void throw_nested() {
try {
throw std::logic_error ("first");
} catch (const std::exception& e) {
std::throw_with_nested(std::logic_error("second"));
}
}
int main () {
try {
throw_nested();
} catch (std::exception& e) {
print_what(e);
}
return 0;
}
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