Boost C++ Application Development Cookbook - Second Edition

How to do it...

All we need is to have an ability to store exceptions and pass them between threads just like a usual variable.

1. Let's start with the function that stores and processes exceptions:

#include <boost/exception_ptr.hpp>struct process_exception {    boost::exception_ptr exc_;    explicit process_exception(const boost::exception_ptr& exc)        : exc_(exc)    {}    void operator()() const;};

2. The operator() of that functor just outputs the exception to the console:

#include <boost/lexical_cast.hpp>void func_test2(); // Forward declaration.void process_exception::operator()() const  {    try {        boost::rethrow_exception(exc_);    } catch (const boost::bad_lexical_cast& /*e*/) {        std::cout << "Lexical cast exception detected\n" << std::endl; // Pushing another ...