R: Examples for 'rlang::new

### ** Examples

# `new_quosure()` creates a quosure from its components. These are
# equivalent:
new_quosure(quote(foo), current_env())

<quosure>
expr: ^foo
env:  0x55ccfe05d9f8

quo(foo)

<quosure>
expr: ^foo
env:  0x55ccfe05d9f8

# `new_quosure()` always rewraps its input into a new quosure, even
# if the input is itself a quosure:
new_quosure(quo(foo))

<quosure>
expr: ^<quosure>
env:  0x55ccfe05d9f8

# This is unlike `as_quosure()` which preserves its input if it's
# already a quosure:
as_quosure(quo(foo))

<quosure>
expr: ^foo
env:  0x55ccfe05d9f8

# `as_quosure()` uses the supplied environment with naked expressions:
env <- env(var = "thing")
as_quosure(quote(var), env)

<quosure>
expr: ^var
env:  0x55ccfe96d478

# If the expression already carries an environment, this
# environment is preserved. This is the case for formulas and
# quosures:
as_quosure(~foo, env)

<quosure>
expr: ^foo
env:  0x55ccfe05d9f8

as_quosure(~foo)

<quosure>
expr: ^foo
env:  0x55ccfe05d9f8

# An environment must be supplied when the input is a naked
# expression:
try(
  as_quosure(quote(var))
)

Warning: `as_quosure()` requires an explicit environment as of rlang 0.3.0. Please
supply `env`.
This warning is displayed once every 8 hours.

<quosure>
expr: ^var
env:  0x55ccfe05d9f8

Examples for 'rlang::new_quosure'

Create a quosure from components