These options will be used on formulas, defined as calls to ~, regardless
of their "class" attribute.
opts_formula(
constructor = c("default", "formula", "as.formula", "new_formula", "next"),
...,
environment = TRUE
)An object of class <constructive_options/constructive_options_formula>
String. Name of the function used to construct the object, see Details section.
Additional options used by user defined constructors through the opts object
Boolean. Whether to attempt to construct the environment, if it makes a difference to construct it.
Depending on constructor, we construct the formula as follows:
"default": We construct the formula in the most common way using the ~
operator.
"formula" : deparse the formula as a string and use base::formula() on top of it.
"as.formula" : Same as above, but using base::as.formula().
"new_formula" : extract both sides of the formula as separate language objects
and feed them to rlang::new_formula(), along with the reconstructed environment
if relevant.