# as_quosure

From rlang v0.2.0
by Lionel Henry

##### Coerce object to quosure

While `new_quosure()`

wraps any R object (including expressions,
formulas, or other quosures) into a quosure, `as_quosure()`

converts formulas and quosures and does not double-wrap.

##### Usage

`as_quosure(x, env = caller_env())`new_quosure(expr, env = caller_env())

##### Arguments

- x
An object to convert. Either an expression or a formula.

- env
The original context of the context expression.

- expr
The expression wrapped by the quosure.

##### Life cycle

Like the rest of the rlang package,

`new_quosure()`

and`as_quosure()`

are maturing.`as_quosureish()`

is deprecated as of rlang 0.2.0. This function assumes that quosures are formulas which is currently true but might not be in the future.

##### See Also

##### Examples

`library(rlang)`

```
# NOT RUN {
# as_quosure() converts expressions or any R object to a validly
# scoped quosure:
as_quosure(quote(expr), base_env())
as_quosure(10L, base_env())
# Sometimes you get unscoped formulas because of quotation:
f <- ~~expr
inner_f <- f_rhs(f)
str(inner_f)
# In that case testing for a scoped formula returns FALSE:
is_formula(inner_f, scoped = TRUE)
# With as_quosure() you ensure that this kind of unscoped formulas
# will be granted a default environment:
as_quosure(inner_f, base_env())
# }
```

*Documentation reproduced from package rlang, version 0.2.0, License: GPL-3*

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