die '...' unless __PACKAGE__->can('as_string');
-
-has has_been_printed => ( is => 'rw' );
+has has_been_printed => ( is => 'rw' );
sub print {
my $self = shift;
@@ -1370,7 +1371,7 @@ sub print {
# or ...
-Person->meta->does('Printable')
+Person->meta->does_role('Printable')
@@ -1430,69 +1431,17 @@ use Moose;
-
Method Aliasing
-
-
package FragileDancer;
-use Moose;
-
-with 'IsFragile' =>
- { -alias =>
- { break => 'break_bone' } },
- 'CanBreakdance' =>
- { -alias =>
- { break => 'break_it_down' } };
-
-
- - Renames the roles' methods
- - Still conflicts, need to
exclude as well
-
-
-
Method Exclusion
-
-
package FragileDancer;
-use Moose;
-
-with 'IsFragile' =>
- { -alias =>
- { break => 'break_bone' },
- -excludes => 'break' },
- 'CanBreakdance' =>
- { -alias =>
- { break => 'break_it_down' },
- -excludes => 'break' };
-
-
And then ...
-
-
package FragileDancer;
-use Moose;
-
-sub break {
- my $self = shift;
-
- $self->break_it_down;
- if ( rand(1) < 0.5 ) {
- $self->break_bone;
- }
-}
-
-
Still Full of Fail
+
Conflicts Are a Smell
- - Roles are also about semantics!
- - We've fulfilled the letter and lost the spirit
+ - Roles are about semantics!
- Roles have a meaning
- - Think twice before blindly aliasing and excluding methods!
+ - Method name conflicts smell like bad design
-
Hot Role-on-Role Action
+
Roles With Roles
package Comparable;
use Moose::Role;
@@ -1501,7 +1450,7 @@ requires 'compare';
-
Hot Role-on-Role Action
+
Roles With Roles
package TestsEquality;
use Moose::Role;
@@ -1548,11 +1497,11 @@ with 'HasSubProcess';
Delayed Conflict
-
package StateOfTexas;
+ package SysadminAssassin;
with 'Killer';
- StateOfTexas must implement its own executeSysadminAssassin must implement its own execute- But loading the
Killer role by itself does not cause an error
@@ -1580,7 +1529,7 @@ use Moose;
with 'HasSize';
-has size => ( is => 'ro' );
+has size => ( is => 'ro' );
@@ -1594,7 +1543,7 @@ requires 'size';
package Shirt;
use Moose;
-has size => ( is => 'ro' );
+has size => ( is => 'ro' );
with 'HasSize';
@@ -1616,9 +1565,9 @@ with 'HasSize';
package Comparison;
use Moose;
-has [ 'left', 'right' ] => (
- is => 'ro',
- does => 'Comparable',
+has [ 'left', 'right' ] => (
+ is => 'ro',
+ does => 'Comparable',
);
@@ -1915,7 +1864,7 @@ has bank => (
sub _build_bank {
my $self = shift;
return Bank->new(
- name => 'Spire FCU' );
+ name => 'Spire FCU' );
}
@@ -1972,7 +1921,7 @@ use Moose;
has shoe_size => (
is => 'ro',
- required => 'ro',
+ required => 1,
);
@@ -1982,7 +1931,7 @@ has shoe_size => (
has shoes => (
is => 'ro',
lazy => 1,
- builder => '_build_shoes',
+ builder => '_build_shoes',
);
sub _build_shoes {
@@ -2055,7 +2004,7 @@ has account => (
package Person;
use Moose;
-has shoe_size => (
+has shoe_size => (
is => 'ro',
init_arg => 'foot_size',
);
@@ -2073,7 +2022,7 @@ print $person->shoe_size;
package Person;
use Moose;
-has shoes => (
+has shoes => (
is => 'ro',
init_arg => undef,
);
@@ -2472,19 +2421,21 @@ around run
=> sub {
Augment and Inner
-
package Document;
+ package Document;
sub xml { '<doc>' . inner() . '</doc>' }
package Report;
extends 'Document';
augment xml =>
- sub { title() . inner() . summary() };
+ sub { my $self = shift;
+ $self->title() . inner() . $self->summary() };
package TPSReport;
extends 'Report';
augment xml =>
- sub { tps_xml() . inner() };
+ sub { my $self = shift;
+ $self->tps_xml() . inner() };
@@ -2610,6 +2561,7 @@ Item
Num
Int
ClassName
+ RoleName
@@ -2763,7 +2715,7 @@ class_type 'DateTime';
-subtype 'DateTime',
+subtype 'DateTime',
as 'Object',
where { $_->isa('DateTime') },
message { ... };
@@ -2778,7 +2730,7 @@ role_type 'Printable';
subtype 'Printable',
- as 'Object',
+ as 'Object',
where
{ Moose::Util::does_role(
$_, 'Printable' ) },
@@ -2804,14 +2756,14 @@ duck_type Car => qw( run break_down );
Subtype Shortcuts - enum
use Moose::Util::TypeConstraints;
-enum Color => qw( red blue green ) );
+enum Color => qw( red blue green );
my %ok = map { $_ => 1 }
qw( red blue green );
-subtype 'Color'
+subtype 'Color'
as 'Str',
where { $ok{$_} },
message { ... };
@@ -2927,6 +2879,19 @@ no Moose;
+
Questions So Far?
+
+
+
+
Exercises
+
+
# cd exercises
+# perl bin/prove -lv t/05-types.t
+
+Iterate til this passes all its tests
+
Typed Methods (Low-tech)
package Person;
@@ -3057,9 +3022,9 @@ coerce ArrayOfInt
use MyApp::Types qw( ArrayOfInt );
-has transaction_history => (
- is => 'rw',
- isa => ArrayOfInt,
+has transaction_history => (
+ is => 'rw',
+ isa => ArrayOfInt,
);
@@ -3103,15 +3068,6 @@ has transaction_history => (
Questions?
-
-
Exercises
-
-
# cd exercises
-# perl bin/prove -lv t/05-types.t
-
-Iterate til this passes all its tests
-
Part 6: Advanced Attributes
@@ -3252,7 +3208,7 @@ $alice->friend($bob);
has lungs => (
is => 'ro',
- isa => 'Lungs',
+ isa => 'Lungs',
handles => [ 'inhale', 'exhale' ],
);
@@ -3416,7 +3372,7 @@ has history => (
use Moose;
has _favorite_numbers => (
traits => [ 'Array' ],
- is => 'ro',
+ is => 'bare',
isa => 'ArrayRef[Int]',
default => sub { [] },
init_arg => undef,
@@ -3577,15 +3533,12 @@ print Person->meta
Use weak_ref to avoid circular references
Use trigger to do an action post-attribute write
Use delegations to hide "internal" objects
+ Use native delegations to treat Perl types as objects
Traits and metaclasses let you extend Moose's core attribute features
-
Questions?
-
-
-
Exercises
# cd exercises
@@ -3595,12 +3548,20 @@ print Person->meta
Iterate til this passes all its tests
-
-
Part 7: Introspection
+
+
CYOA
+
+
+ If there is time, keep going ...
+
+
+
+ Otherwise, jump to slide 269 ...
+
-
Part 8: A Brief Tour of MooseX
+ Bonus: A Brief Tour of MooseX
@@ -3794,12 +3755,21 @@ with HasCollection => { type => 'Int' };
Questions?
-
-
Part 9: Writing Moose Extensions
-
+
+
Moose-using Modules
-
-
The End
+
+ For further reading, a few modules which use Moose ...
+
+
+
@@ -3816,6 +3786,10 @@ with HasCollection => { type => 'Int' };
+
+
The End
+
+