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boost-ext / sml

C++14 State Machine library
https://boost-ext.github.io/sml
Boost Software License 1.0
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Any state doesn't work correctly with nested sub-states #622

Open dingari opened 1 week ago

dingari commented 1 week ago

An FSM with a nested sub-state declared as a struct will not correctly transition using the any state feature (#602 )

I've been scratching my head for hours trying to figure out why my state machine doesn't behave the way I expect it to.

See this example.

I expect the state machine to transition from init -> b -> a -> b. This only happens if the nested state machine a itself is declared as a class.

Edit: Seems like it has something to the visibility of operator(). A struct with a private operator() transitions correctly, and a class with a public operator() doesn't...