tidylab / exceptions

Raising exceptions is an alternative for returning error codes. Exceptions are events, which occurs during the execution of a program that disrupts the normal flow of the program's instructions.

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Philosophy #1

Open harell opened 3 years ago

harell commented 3 years ago

[ ] 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 commented 3 years ago

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 commented 3 years ago

Consider the mechanism behind

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