boost::msm::backmp11::default_observer::pre_process_transition

Hook called before a (sub‐)machine processes a sm‐internal transition.

Synopsis

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

template<
    typename Event,
    typename Action,
    typename Guard,
    typename StateMachine>
constexpr
void
pre_process_transition(StateMachine const&) const;

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