Creates an active binding that generates a warning when accessed, using
warn_deprecated(). The active binding will otherwise be read-only.
Usage
deprecated_binding(what, value)
Arguments
- what
(character(1))
A description of the deprecated binding. Should be of the form "Class$field".
- value
(any)
The value of the active binding. This should be an expression that will
be evaluated in the context of the active binding. It could, for example,
refer to self.
Examples
MyClass = R6::R6Class("MyClass", public = list(),
active = list(
foo = deprecated_binding("MyClass$foo", "bar")
)
)
mco = MyClass$new()
mco$foo
#> Warning:
#> ✖ MyClass$foo is deprecated and will be removed in the future.
#> → Class: Mlr3WarningDeprecated
#> [1] "bar"
