我最近开始使用模块MooseX::Declare。我喜欢它的语法。它优雅而整洁。有没有人遇到过您想在一个类中编写许多函数(其中一些很大)并且类定义运行到页面中的情况?是否有任何解决方法可以使类定义仅在类外部声明函数和真正的函数定义?
我正在寻找的是这样的 -
class BankAccount {
has 'balance' => ( isa => 'Num', is => 'rw', default => 0 );
# Functions Declaration.
method deposit(Num $amount);
method withdraw(Num $amount);
}
# Function Definition.
method BankAccount::deposit (Num $amount) {
$self->balance( $self->balance + $amount );
}
method BankAccount::withdraw (Num $amount) {
my $current_balance = $self->balance();
( $current_balance >= $amount )
|| confess "Account overdrawn";
$self->balance( $current_balance - $amount );
}
我可以看到有一种方法可以使类可变。有谁知道该怎么做?