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State-Oriented Programming: was a cover story article about Hierarchical State Machines in C and C++ published originally in "Embedded Systems Programming" magazine in August 2000. This repository contains the article PDF and the updated code.

License: Apache License 2.0

C 50.94% Batchfile 0.57% C++ 48.49%

state-oriented-programming's Issues

Unable to compile the C++ example on Ubuntu 22.04 and g++ 11.4.0

The error message is:

 g++ watch.cpp hsm.cpp -o watch
watch.cpp: In constructor ‘Watch::Watch()’:
watch.cpp:209:28: error: cannot convert ‘Watch::topHndlr’ from type ‘const Msg* (Watch::)(const Msg*)’ to type ‘EvtHndlr’ {aka ‘const Msg* (Hsm::*)(const Msg*)’}
  209 |   : Hsm("Watch", (EvtHndlr)topHndlr),
      |                            ^~~~~~~~
hsm.cpp: In member function ‘void Hsm::onStart()’:

The C examples compiles & works just fine

This HSM implementation is still relevant and beautiful in its simplicity (and not just for embedded) . My C++ is very basic, how can the code be fixed to work on modern g++?

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