rlang (version 0.1)

as_env: Coerce to an environment

Description

as_env() coerces named vectors (including lists) to an environment. It first checks that x is a dictionary (see is_dictionaryish()). If supplied an unnamed string, it returns the corresponding package environment (see pkg_env()).

Usage

as_env(x, parent = NULL)

Arguments

x

An object to coerce.

parent

A parent environment, empty_env() by default. This argument is only used when x is data actually coerced to an environment (as opposed to data representing an environment, like NULL representing the empty environment).

Details

If x is an environment and parent is not NULL, the environment is duplicated before being set a new parent. The return value is therefore a different environment than x.

Examples

# NOT RUN {
# Coerce a named vector to an environment:
env <- as_env(mtcars)

# By default it gets the empty environment as parent:
identical(env_parent(env), empty_env())


# With strings it is a handy shortcut for pkg_env():
as_env("base")
as_env("rlang")

# With NULL it returns the empty environment:
as_env(NULL)
# }