R: 'option_symlink' creates a symbolic link to option 'x'.

option_symlink {pkgmaker}

R Documentation

`option_symlink` creates a symbolic link to option `x`.

Description

option_symlink creates a symbolic link to option x.

is_option_symlink tests if x is a symbolic link option.

option_symlink_target returns the end target option of a symbolic link option x.

as.package_options creates an object such as the ones used to stores package specific options.

The method [[ is equivalent to options() or getOption(...): e.g. obj[[]] returns the list of options defined in obj, and obj[['abc']] returns the value of option 'abc'.

packageOptions provides access to package specific options from a given package that were defined with setupPackageOptions, and behaves as the base function options.

listPackageOptions returns the names of all option currently defined with setupPackageOptions.

Usage

  option_symlink(x)

  is_option_symlink(x, opts)

  option_symlink_target(x, opts)

  as.package_options(..., defaults = NULL)

  ## S3 method for class 'package_options'
 x[[...]]

  packageOptions(..., PACKAGE = packageName())

  listPackageOptions()

Arguments

`opts`	a list of options
`x`	a character string, a list or an object of class `package_options`.
`defaults`	`NULL` or a list of default options with their values.
`...`	arguments passed to `getOption` (only first one is used).
`PACKAGE`	a package name

Value

a character vector (possibly empty).

Examples



listPackageOptions()