1Sub::Exporter::ForMethoUdsse(r3)Contributed Perl DocumenStuabt:i:oEnxporter::ForMethods(3)
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NAME

6       Sub::Exporter::ForMethods - helper routines for using Sub::Exporter to
7       build methods
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VERSION

10       version 0.100050
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SYNOPSIS

13       In an exporting library:
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15         package Method::Builder;
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17         use Sub::Exporter::ForMethods qw(method_installer);
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19         use Sub::Exporter -setup => {
20           exports   => [ method => \'_method_generator' ],
21           installer => method_installer,
22         };
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24         sub _method_generator {
25           my ($self, $name, $arg, $col) = @_;
26           return sub { ... };
27         };
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29       In an importing library:
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31         package Vehicle::Autobot;
32         use Method::Builder method => { -as => 'transform' };
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DESCRIPTION

35       The synopsis section, above, looks almost indistinguishable from any
36       other use of Sub::Exporter, apart from the use of "method_installer".
37       It is nearly indistinguishable in behavior, too.  The only change is
38       that subroutines exported from Method::Builder into named slots in
39       Vehicle::Autobot will be wrapped in a subroutine called
40       "Vehicle::Autobot::transform".  This will insert a named frame into
41       stack traces to aid in debugging.
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43       More importantly (for the author, anyway), they will not be removed by
44       namespace::autoclean.  This makes the following code work:
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46         package MyLibrary;
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48         use Math::Trig qw(tan);         # uses Exporter.pm
49         use String::Truncate qw(trunc); # uses Sub::Exporter's defaults
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51         use Sub::Exporter::ForMethods qw(method_installer);
52         use Mixin::Linewise { installer => method_installer }, qw(read_file);
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54         use namespace::autoclean;
55
56         ...
57
58         1;
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60       After MyLibrary is compiled, "namespace::autoclean" will remove "tan"
61       and "trunc" as foreign contaminants, but will leave "read_file" in
62       place.  It will also remove "method_installer", an added win.
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EXPORTS

65       Sub::Exporter::ForMethods offers only one routine for export, and it
66       may also be called by its full package name:
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68   method_installer
69       This routine returns an installer suitable for use as the "installer"
70       argument to Sub::Exporter.  It updates the "\@to_export" argument to
71       wrap all code that will be installed by name in a named subroutine,
72       then passes control to the default Sub::Exporter installer.
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AUTHOR

75         Ricardo Signes <rjbs@cpan.org>
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78       This software is copyright (c) 2010 by Ricardo Signes.
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80       This is free software; you can redistribute it and/or modify it under
81       the same terms as the Perl 5 programming language system itself.
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85perl v5.12.3                      2010-01-06      Sub::Exporter::ForMethods(3)
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