Skip to contents

Constructive options for formulas

Source: R/s3-formula.R
opts_formula.Rd

These options will be used on formulas, defined as calls to ~, regardless of their "class" attribute.

Usage

opts_formula(
  constructor = c("default", "formula", "as.formula", "new_formula", "next"),
  ...,
  environment = TRUE
)

Arguments

constructor

String. Name of the function used to construct the object, see Details section.

...

Additional options used by user defined constructors through the opts object

environment

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.

Value

An object of class <constructive_options/constructive_options_formula>