如何在Perl scalars上调用方法?

你指的是 autobox ?也见 Should I use autobox in Perl? .

这是一个使用AutoBox功能的示例。

#!/usr/bin/perl

use strict;
use warnings;

package MyInt;

sub is_odd {
  my $int = shift;
  return ($int%2);
}

package main;

use autobox INTEGER => 'MyInt';
print "42: ".42->is_odd."\n";
print "43: ".43->is_odd."\n";
print "44: ".44->is_odd."\n";