NAME

filtered - Apply source filter on external module

SYNOPSIS

  # Apply source filter YourFilter.pm on Target.pm, then result can be used as FilteredTarget
  use filtered by => 'YourFilter', as => 'FilteredTarget', on => 'Target', qw(func);
  my $obj = FilteredTarget->new;

  # You can omit `as' option and `on' key
  use filtered by => 'YourFilter', 'Target', qw(func);
  my $obj = Target->new; # Target is filtered

  # You can use differnt module with the same filter
  use filtered by => 'YourFilter', as => 'FilteredTarget1', on => 'Target1', qw(func);
  use filtered by => 'YourFilter', as => 'FilteredTarget2', on => 'Target2', qw(func);

  # or, you can also use differnt filters on the same module
  use filtered by => 'YourFilter1', as => 'FilteredTarget1', on => 'Target', qw(func);
  use filtered by => 'YourFilter2', as => 'FilteredTarget2', on => 'Target', qw(func);

DESCRIPTION

Source filter has unlimited power to enhance Perl. However, source filter is usually applied on your own sources. This module enables you to apply source filter on external module.

OPTIONS

Rest of the options are passed to import of filtered module.

by: Specify a source filter module you want to apply on an external module.
as: Specify the package name for the resultant filtered module. This option can be omitted. If omitted, original names are used.
on: Specify a target module. on keyword can be ommited.

CAVEATS

This module uses @INC hook.

For @INC hook, please consult perldoc -f require. Hook itself is enabled in short period but it may affect other modules.

Replacement by as is applied in limited context.

If you specified as => FilteredTarget, on => Target, the following codes:

  package Target::work;
  package Target;
  Target::work::call();

are transformed into as follows:

  package FilteredTarget::work;
  package FilteredTarget;
  FilteredTarget::work::call();

Actually, only '\bpackage\s+Target\b' and '\bTarget::\b' are replaced.

AUTHOR

Yasutaka ATARASHI <yakex@cpan.org>

LICENSE

This is free software; you can redistribute it and/or modify it under the same terms as the Perl 5 programming language system itself.