option_symlink {pkgmaker}

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

x

a character string, a list or an object of class package_options.

opts

a list of options

...

Arguments passed on to base::options

defaults

NULL or a list of default options with their values.

PACKAGE

a package name

Value

• packageOptions returns a list of package-specific options.

• listPackageOptions returns a character vector (possibly empty).

Examples

listPackageOptions()