Boost C++ Libraries

...one of the most highly regarded and expertly designed C++ library projects in the world. Herb Sutter and Andrei Alexandrescu, C++ Coding Standards

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Boost Exception

throw_exception

#include <boost/throw_exception.hpp>

namespace
boost
    {
#ifdef BOOST_NO_EXCEPTIONS
    void throw_exception( std::exception const & e ); // user defined
#else
    template <class E>
    void throw_exception( E const & e );
#endif
    }

Effects:

  • If BOOST_NO_EXCEPTIONS is not defined, boost::throw_exception(e) throws an exception of unspecified type that derives publicly from E and from boost::exception.
  • If BOOST_NO_EXCEPTIONS is defined, the function is left undefined, and the user is expected to supply an appropriate definition. Callers of throw_exception are allowed to assume that the function never returns; therefore, if the user-defined throw_exception returns, the behavior is undefined.

Requirements:

E must derive publicly from std::exception. E may or may not derive from boost::exception.

Notes:

  • The emitted exception can be intercepted as E &, std::exception &, or boost::exception &.
  • The emitted exception supports boost::exception_ptr.
  • If BOOST_EXCEPTION_DISABLE is defined and BOOST_NO_EXCEPTIONS is not defined, boost::throw_exception(e) equivalent to throw e.