[1] [CITE[perlvar - search.cpan.org]]
([TIME[2015-02-26 19:34:25 +09:00]] 版)
<http://search.cpan.org/dist/perl/pod/perlvar.pod#Error_Variables>

[2] [CITE[Try::Tiny - search.cpan.org]]
([TIME[2017-07-17 12:14:58 +09:00]])
<http://search.cpan.org/dist/Try-Tiny/lib/Try/Tiny.pm>

[3] [CITE[perl5140delta - search.cpan.org]]
([TIME[2017-08-28 13:15:13 +09:00]])
<http://search.cpan.org/~dapm/perl-5.14.4/pod/perl5140delta.pod#Exception_Handling>

[4] [CODE[Eval::Context]] という[[Perlモジュール]]があります。