Packages and Modules
- import module [ list ]
Usually imports subroutines and variables from module into the current package. import is not a built-in, but an ordinary class method that may be inherited from
UNIVERSAL.- no module [ list ]
At compile time, requires the module and calls its unimport method on list. See use on the next page.
- package namespace [ version ] [ block ]
Designates the block as a package with a namespace. Without block, applies to the remainder of the current block or file. Sets package variable
$VERSIONto version, if specified.- require version
Requires Perl to be at least this version. version can be numeric like
5.005or5.008001,or a v-string likev5.8.1.- require expr†
If expr is numeric, behaves like require version. Otherwise expr must be the name of a file that is included from the Perl library. Does not include more than once, and yields a fatal error if the file does not evaluate to true. If expr is a bare word, assumes extension
.pmfor the name of the file.- unimport module [ list ]
Usually cancels the effects of a previous import or use. Like import, unimport is not a built-in, but an ordinary class method.
- use version
- use pragma
See the section Pragmatic Modules below.
By convention, pragma names start with a lowercase letter.
- use module [ version ] [ list ]
At compile time, requires the module, optionally verifies the version, and calls its import method on list.
If list is
(),doesn’t call import.Normally used to import a list of variables and subroutines from ...