Rollback activity: infinite loop

[bart6114]

Some ponderings; maybe it should be possible for a rollback to be infinite, only to be interrupted by the simulation end or a (currently none-existing) skip(times) activity. If #16 would be realised this would allow for a huge amount of flexibility.

[Enchufa2]

+1000

[Enchufa2]

Done. Now, you can implement an infinite rollback as follows:

t0 <- create_trajectory() %>% 
  timeout(function() 1) %>%
  rollback(1, times=Inf)

Or, alternatively, you can do the same as follows:

t0 <- create_trajectory() %>% 
  timeout(function() 1) %>%
  rollback(1, check=function() 1)

By specifying the check argument as a function, the times argument is ignored and the rollback activity decides whether to go back or not using this user-defined function, which has great flexibility (and a lot more when #16 is implemented).