ex

ex.cc

#include <exception>
#include "string"
#include "memory"

typedef std::string str;

namespace ro_err {
    class StdErr : public std::exception {

    public:
        str msg;

        StdErr(str msg) { this->msg = msg; };

        virtual const char *what() const override {
            return this->msg.c_str();
        };
    };

    class ShErr : public StdErr {

    public:
        ShErr(str m) : StdErr(m) { }
    };
}

int main(int argc, char **argv) {
    throw ro_err::ShErr("smth");
    return (0);
};