Enum error_code

extern/boost/boost/test/execution_monitor.hpp:261–269

    /// @note(2) These errors include Unix signals and Windows structured
    /// exceptions. They are often initiated by hardware traps.
    enum error_code {
        no_error               = 0,   ///< for completeness only; never returned
        user_error             = 200, ///< user reported non-fatal error
        cpp_exception_error    = 205, ///< see note (1) above
        system_error           = 210, ///< see note (2) above
        timeout_error          = 215, ///< only detectable on certain platforms
        user_fatal_error       = 220, ///< user reported fatal error
        system_fatal_error     = 225  ///< see note (2) above
    };

    /// Simple model for the location of failure in a source code
    struct BOOST_TEST_DECL location {