| ns-lowlev {base} | R Documentation |
Low level name space support functions.
attachNamespace(ns, pos = 2)
loadNamespace(package, lib.loc = NULL,
keep.source = getOption("keep.source.pkgs"),
partial = FALSE, declarativeOnly = FALSE)
loadedNamespaces()
unloadNamespace(ns)
loadingNamespaceInfo()
saveNamespaceImage(package, rdafile, lib.loc = NULL,
keep.source = getOption("keep.source.pkgs"),
compress = TRUE)
ns |
string or namespace object. |
pos |
integer specifying position to attach. |
package |
string naming the package/name space to load. |
lib.loc |
character vector specifying library search path. |
keep.source |
logical specifying whether to retain source. |
partial |
logical; if true, stop just after loading code. |
declarativeOnly |
logical; disables .Import, etc, if true. |
compress |
option passed to save. |
The functions loadNamespace and attachNamespace are
usually called implicitly when library is used to load a name
space and any imports needed. However it may be useful to call
these functions directly at times.
loadNamespace loads the specified name space and registers it in
an internal data base. A request to load a name space that is already
loaded has no effect. The arguments have the same meaning as the
corresponding arguments to library. After loading,
loadNamespace looks for a hook function named
.onLoad as an internal variable in the name space (it
should not be exported). This function is called with the same arguments
as .First.lib. Partial loading is used to support installation with
the --save option.
loadNamespace does not attach the name space it loads to the
search path. attachNamespace can be used to attach a frame
containing the exported values of a name space to the search path.
The hook function .onAttach is run after the name space
exports are attached.
loadedNamespaces returns a character vector of the names of
the loaded name spaces.
unloadNamespace can be used to force
a name space to be unloaded. An error is signaled if the name space
is imported by other loaded name spaces. If defined, a hook
function \code{.onUnload} is run
before removing the name space from the internal registry.
unloadNamespace will first detach a package of
the same name if one is on the path, thereby running a
.Last.lib function in the package if one is exported.
loadingNamespaceInfo returns a list of the arguments that
would be passed to .onLoad when a name space is being loaded.
An error is signaled of a name space is not currently being loaded.
saveNamespaceImage is used to save name space images for
packages installed with --save.
Luke Tierney