publicEval {zlib} | R Documentation |
Evaluate Expression with Public and Private Environments
Description
publicEval
creates an environment hierarchy consisting of
public, self, and private environments. The expression expr
is
evaluated within these nested environments, allowing for controlled
variable scope and encapsulation.
Usage
publicEval(expr, parentEnv = parent.frame(), name = NULL)
Arguments
expr |
An expression to evaluate within the constructed environment hierarchy. |
parentEnv |
The parent environment for the new 'public' environment. Default is the parent frame. |
name |
Optional name attribute to set for the public environment. |
Value
Returns an invisible reference to the public environment.
Environments
Public: Variables in this environment are externally accessible.
Self: Inherits from Public and also contains Private and Public as children.
Private: Variables are encapsulated and are not externally accessible.
Examples
publicEnv <- publicEval({
private$hidden_var <- "I am hidden"
public_var <- "I am public"
}, parentEnv = parent.frame(), name = "MyEnvironment")
print(exists("public_var", envir = publicEnv)) # Should return TRUE
print(exists("hidden_var", envir = publicEnv)) # Should return FALSE
[Package zlib version 1.0.3 Index]