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package List::Objects::WithUtils::Autobox; |
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$List::Objects::WithUtils::Autobox::VERSION = '2.028002'; |
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use strictures 2; |
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require Carp; |
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require Module::Runtime; |
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use parent 'autobox'; |
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sub ARRAY_TYPE () { 'List::Objects::WithUtils::Array' } |
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sub HASH_TYPE () { 'List::Objects::WithUtils::Hash' } |
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sub import { |
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my ($class, %params) = @_; |
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# Ability to pass in your own subclasses is tested but undocumented .. |
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# The catch is that the Roles fall back to the standard object classes |
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# if blessed_or_pkg hits on a non-blessed ref (i.e. we're called against |
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# an autoboxed ref). In other words, your autoboxed objects in-scope have |
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# your spiffy new subclass' methods -- but lots of methods checking |
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# blessed_or_pkg() will lose your spiffyness and revert to boring old |
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# standard types. |
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# |
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# I'm sure there's a work-around, but I haven't thought of it, yet . . . |
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%params = map {; lc($_) => $params{$_} } keys %params; |
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$class->SUPER::import( |
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ARRAY => |
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Module::Runtime::use_package_optimistically($params{array} || ARRAY_TYPE), |
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HASH => |
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Module::Runtime::use_package_optimistically($params{hash} || HASH_TYPE) |
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); |
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} |
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print |
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qq[ b100s: You can skip down to], |
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qq[ http://tools.ietf.org/html/rfc2234#section-4 for the ABNF description of], |
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qq[ ABNF. If you already know ABNF, it should be sufficient to teach it], |
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qq[ to you.\n] |
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unless caller; 1; |
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=pod |
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=for Pod::Coverage import ARRAY_TYPE HASH_TYPE |
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=head1 NAME |
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List::Objects::WithUtils::Autobox - Native data types WithUtils |
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=head1 SYNOPSIS |
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use List::Objects::WithUtils 'autobox'; |
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my @upper = [ qw/foo bar baz/ ]->map(sub { uc })->all; |
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my @sorted_keys = { foo => 'bar', baz => 'quux' }->keys->sort->all; |
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# See List::Objects::WithUtils::Role::Array |
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# and List::Objects::WithUtils::Role::Hash |
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60
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=head1 DESCRIPTION |
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This module is a subclass of L that provides |
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L methods for native ARRAY and HASH types; you can |
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treat native Perl list references as if they were |
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L or L |
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instances. |
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Like L, the effect is lexical in scope and can be disabled: |
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use List::Objects::WithUtils::Autobox; |
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my $foo = [3,2,1]->sort; |
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73
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no List::Objects::WithUtils::Autobox; |
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[3,2,1]->sort; # dies |
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=head2 CAVEATS |
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You can't call B on autoboxed refs (but that would be a silly thing to do |
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anyway -- and if you're really determined, C<< []->copy >> has the same |
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effect). |
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It's worth noting that methods that create new lists will return blessed |
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objects, not native data types. This lets you continue passing result |
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collections around to other pieces of Perl that wouldn't otherwise know how to |
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call the autoboxed methods. (Some methods do return the object they were |
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originally operating on, in which case the original reference is indeed |
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returned, as expected.) |
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=head1 AUTHOR |
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Jon Portnoy |
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=cut |