leanify_r6 {mlr3misc} | R Documentation

## Move all methods of an R6 Class to an environment

### Description

`leanify_r6` moves the content of an `R6::R6Class`'s functions to an environment, usually the package's namespace, to save space during serialization of R6 objects. `leanify_package` move all methods of all R6 Classes to an environment.

The function in the class (i.e. the object generator) is replaced by a stump function that does nothing except calling the original function that now resides somewhere else.

It is possible to call this function after the definition of an R6::R6 class inside a package, but it is preferred to use `leanify_package()` to just leanify all R6::R6 classes inside a package.

### Usage

    leanify_r6(cls, env = cls$parent_env)

    leanify_package(pkg_env = parent.frame(), skip_if = function(x) FALSE)

### Arguments

`cls` | (R6::R6Class) Class generator to modify.
`env` | (`environment`) The target environment where the function should be stored. This should be either `cls$parent_env` (default) or one of its parent environments, otherwise the stump function will not find the moved (original code) function.
`pkg_env` | :: `environment` The namespace from which to leanify all R6 classes. Does not have to be a package namespace, but this is the intended usecase.
`skip_if` | :: `function` Function with one argument: Is called for each individual `R6::R6Class`. If it returns `TRUE`, the class is skipped. Default function evaluating to `FALSE` always (i.e. skipping no classes).

### Value

`NULL`.

[Package mlr3misc version 0.8.0 Index]