option_symlink
creates a symbolic link to option x
.option_symlink(x)
is_option_symlink(x, opts)
option_symlink_target(x, opts)
as.package_options(..., defaults = NULL)
S3 (package_options)
`[[`(x, ...)
packageOptions(..., PACKAGE = packageName())
listPackageOptions()
package_options
.NULL
or a list of default options
with their values.getOption
(only
first one is used).a character vector (possibly empty).
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
.
listPackageOptions()character(0)