Philosophy

[harell]

• A mechanism for creating events with callable functions. By default will call stop().
• Extanable class
• exception as active binding? This way, one can call an exception without parentheses '()'

See utils::withCallingHandlers in https://adv-r.hadley.nz/conditions.html

References

• Python built-in exceptions
• DDD Domain Events

[harell]

BaseException= R6::R6Class("BaseException", public = list(handler = stop))


NameError = R6::R6Class(inherits =  BaseException)
NameError.set("public", "initilize", function(name) self.handler(name))
NameError = NameError$new()


NameError('HiThere')

[harell]

Consider the mechanism behind

• https://github.com/jimhester/types
• https://github.com/jimhester/typeCheck