boost::msm::backmp11::default_observer::pre_process_event

Hook called before a (sub‐)machine processes an event.

Synopsis

Declared in <boost/msm/backmp11/observer.hpp>

template<
    typename StateMachine,
    typename Event>
constexpr
void
pre_process_event(
    StateMachine const&,
    Event const&) const;

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