c++ - 级联 Poco 异常

Question

我尝试在 Poco 中级联异常。

void debug() {
try {
    ...
    xmlFile.parseDocument(*_sim);
    ...
    }
} catch (Poco::Exception& error) {
    std::cout << "I'm here" << endl;
    std::cout << "Error : " << error.displayText() << std::endl;
}
}

void XMLParser::parseDocument(Manager &manager) {
...
try {
    Poco::XML::NodeList* policyList = root->childNodes();
    for (uint node=0; node < policyList->length(); node++)
        if (policyList->item(node)->hasChildNodes())
            manager.insertRule(parseRule(node, policyList->item(node)));
} catch(Poco::Exception& error) {
    std::cout << "Error : " << error.displayText() << std::endl;
    error.rethrow();
}
}

Rule* XMLParser::parseRule(int flowID, Poco::XML::Node* rule) throw() {
    ....
    if (tLink._srcPort < 0)
        throw new Poco::Exception("Source Port isn't valid");
    ....
}

最深的异常被抛出，但它不会继续到外部函数。程序终止。为什么？

Answer 1

您抛出一个 Poco::Exception 指针，因此您无法通过引用捕获它。删除"new"。这应该有效:

....
if (tLink._srcPort < 0)
    throw Poco::Exception("Source Port isn't valid");
....