catching polymorphic type 'class std::exception' by value [-Wcatch-value=]

Posted 2022-09-23 sageloris

class Person
public:
    Person()
        mAge = 0;
    
    void setAge(int age)
        if(age < 0 || age > 100)
            throw out_of_range("年龄应该在0-100之间！");
        
        this->mAge = age;
    
public:
    int mAge;
;

void test01()
    Person p;
    try
        p.setAge(1024);
    catch(out_of_range& e)//此处报错
        cout << e.what() << endl;
    

gcc编译报错catching polymorphic type ‘class std::exception‘ by value [-Wcatch-value=]；