1namespace::sweep(3)   User Contributed Perl Documentation  namespace::sweep(3)
2
3
4

NAME

6       namespace::sweep - Sweep up imported subs in your classes
7

VERSION

9       version 0.006
10

SYNOPSIS

12           package Foo;
13
14           use namespace::sweep;
15           use Some::Module qw(some_function);
16
17           sub my_method {
18                my $foo = some_function();
19                ...
20           }
21
22           package main;
23
24           Foo->my_method;      # ok
25           Foo->some_function;  # ERROR!
26

DESCRIPTION

28       Because Perl methods are just regular subroutines, it's difficult to
29       tell what's a method and what's just an imported function. As a result,
30       imported functions can be called as methods on your objects. This
31       pragma will delete imported functions from your class's symbol table,
32       thereby ensuring that your interface is as you specified it. However,
33       code inside your module will still be able to use the imported
34       functions without any problems.
35

ARGUMENTS

37       The following arguments may be passed on the "use" line:
38
39       -cleanee
40           If you want to clean a different class than the one importing this
41           pragma, you can specify it with this flag. Otherwise, the importing
42           class is assumed.
43
44               package Foo;
45               use namespace::sweep -cleanee => 'Bar'   # sweep up Bar.pm
46
47       -also
48           This lets you provide a mechanism to specify other subs to sweep up
49           that would not normally be caught. (For example, private helper
50           subs in your module's class that should not be called as methods.)
51
52               package Foo;
53               use namespace::sweep -also => '_helper';          # sweep up single sub
54               use namespace::sweep -also => [qw/foo bar baz/];  # list of subs
55               use namespace::sweep -also => qr/^secret_/;       # subs matching regex
56
57           You can also specify a subroutine reference which will receive the
58           symbol name as $_. If the sub returns true, the symbol will be
59           swept.
60
61               # sweep up those rude four-letter subs
62               use namespace::sweep -also => sub { return 1 if length $_ == 4 }
63
64           You can also combine these methods into an array reference:
65
66               use namespace::sweep -also => [ 'string', sub { 1 if /$pat/ and $_ !~ /$other/ }, qr/^foo_.+/ ];
67

RATIONALE

69       This pragma was written to address some problems with the excellent
70       namespace::autoclean.  In particular, namespace::autoclean will remove
71       special symbols that are installed by overload, so you can't use
72       namespace::autoclean on objects that overload Perl operators.
73
74       Additionally, namespace::autoclean relies on Class::MOP to figure out
75       the list of methods provided by your class. This pragma does not depend
76       on Class::MOP or Moose, so you can use it for non-Moose classes without
77       worrying about heavy dependencies.
78
79       However, if your class has a Moose (or Moose-compatible) "meta" object,
80       then that will be used to find e.g. methods from composed roles that
81       should not be deleted.
82
83       In most cases, namespace::sweep should work as a drop-in replacement
84       for namespace::autoclean.  Upon release, this pragma passes all of
85       namespace::autoclean's tests, in addition to its own.
86

CAVEATS

88       This is an early release and there are bound to be a few hiccups along
89       the way.
90

ACKNOWLEDGEMENTS

92       Thanks Florian Ragwitz and Tomas Doran for writing and maintaining
93       namespace::autoclean.
94
95       Thanks to Toby Inkster for submitting some better code for finding
96       "meta" objects.
97

SEE ALSO

99       namespace::autoclean, namespace::clean, overload
100

AUTHOR

102       Mike Friedman <friedo@friedo.com>
103
105       This software is copyright (c) 2011 by Mike Friedman.
106
107       This is free software; you can redistribute it and/or modify it under
108       the same terms as the Perl 5 programming language system itself.
109
110
111
112perl v5.34.0                      2021-07-23               namespace::sweep(3)
Impressum