Question

I have state machine where I have about 60 rows (transitions). It is not compiling anymore because there of some limitation on MPL types.

I found out from the Boost MSM documentation that this limitation can be solved by

For the moment, the only solution to achieve more is to add headers
to the MPL (luckily, this is not very complicated).

so how add headers to the MPL?

Answer 1

before any #include <mpl...> define this :

#define BOOST_MPL_CFG_NO_PREPROCESSED_HEADERS
#define BOOST_MPL_LIMIT_VECTOR_SIZE 30 // or whatever you need               
#define BOOST_MPL_LIMIT_MAP_SIZE 30 // or whatever you need