Perl “服务中的对象”下不可见的修饰符
鉴于以下情况:Perl “服务中的对象”下不可见的修饰符,perl,moo,bread-board,Perl,Moo,Bread Board,鉴于以下情况: Moo 2.001001 面包:纸板0.34 一个Bread::Board容器 基类Foo带有属性str和around修饰符,用于str 子类Bar扩展Foo 问题是: [好]当从普通条实例化对象时,执行Foo::str修饰符 [BAD]从容器服务为Bar实例化对象时,Foo::str修饰符未执行 [更糟]在[坏]发生后,从普通条实例化也不再有效 代码示例: #!/usr/qlc/apps/common/perl_5.18.2/bin/perl -w package F
- Moo 2.001001李>
- 面包:纸板0.34李>
- 一个
容器Bread::Board
- 基类
带有属性Foo
和str
修饰符,用于around
str
- 子类
扩展Bar
Foo
- [好]当从普通
实例化对象时,执行条
修饰符李>Foo::str
- [BAD]从容器服务为
实例化对象时,Bar
修饰符未执行李>Foo::str
- [更糟]在[坏]发生后,从普通
实例化也不再有效李>条
#!/usr/qlc/apps/common/perl_5.18.2/bin/perl -w
package Foo;
use Moo;
has str => ( is => 'rw', default => '' );
sub BUILD {
my ($self, $args) = @_;
$self->str($self->str);
}
around str => sub {
my ($orig, $self, $val) = @_;
return $self->$orig unless defined $val;
$self->$orig('prefix_'.$val);
};
# end of Foo
package Bar;
use Moo;
extends 'Foo';
# end of Bar
package main;
use 5.010;
use strictures 2;
use Bread::Board;
my $c = container 'MyApp' => as {
service 'foo' => ( class => 'Foo', parameters => { str => { optional => 1 } } );
service 'bar' => ( class => 'Bar', parameters => { str => { optional => 1 } } );
};
my $foo_plain = Foo->new({ str => 'foo_plain' });
say "foo_plain = ".$foo_plain->str;
my $foo_bb = $c->resolve( service => 'foo', parameters => { str => 'foo_bb' } );
say "foo_bb = ".$foo_bb->str;
$foo_bb->str('foo_bb_setter');
say "foo_bb_setter = ".$foo_bb->str;
my $foo_plain_after_bb = Foo->new({ str => 'foo_plain_after_bb' });
say "foo_plain_after_bb = ".$foo_plain_after_bb->str;
my $bar_plain = Bar->new({ str => 'bar_plain' });
say "bar_plain = ".$bar_plain->str;
my $bar_bb = $c->resolve( service => 'bar', parameters => { str => 'bar_bb' } );
say "bar_bb = ".$bar_bb->str;
$bar_bb->str('bar_bb_setter');
say "bar_bb_setter = ".$bar_bb->str;
my $bar_plain_after_bb = Bar->new({ str => 'bar_plain_after_bb' });
say "bar_plain_after_bb = ".$bar_plain_after_bb->str;
die;
输出:
foo_plain = prefix_foo_plain
foo_bb = prefix_foo_bb
foo_bb_setter = prefix_foo_bb_setter
foo_plain_after_bb = prefix_foo_plain_after_bb
bar_plain = prefix_bar_plain
bar_bb = bar_bb
bar_bb_setter = bar_bb_setter
bar_plain_after_bb = bar_plain_after_bb
请注意,bar\u bb
、bar\u bb\u setter
和bar\u plain\u后的bar\u bb
输出不包含前缀
字符串
为什么?这是面包板上的一个虫子
固定在
谢谢。问题正在调查中