perl - Moose - 从 Num 强制转换为 ArrayRef[Num]？

Question

好吧，我做错了什么 - Moose 忽略了我的强制:

package moo;

use Moose;
use Moose::Util::TypeConstraints;

subtype Bar => as 'ArrayRef[Num]';

coerce 'Bar' =>
  from 'Num' => via { [ 10 ] }; # this doesn't seem to be getting called

has x => (
  is => 'rw',
  isa => 'Bar',
);

package main;

my $m1 = moo->new(x => [ 3 ]);  # works
my $m2 = moo->new(x => 5);      # doesn't work

Answer 1

也许您在定义 x 属性时忘记了 coerce => 1。

has x => ( is  => 'rw', isa => 'Bar', coerce => 1 );

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