These functions are deprecated as of rlang 0.2.0 because they make the assumption that quosures are a subtype of formula, which we are now considering to be an implementation detail.
is_quosureish(x, scoped = NULL)as_quosureish(x, env = caller_env())
An object to test.
A boolean indicating whether the quosure is scoped,
that is, has a valid environment attribute. If NULL, the scope
is not inspected.
The original context of the context expression.