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

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

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

[4] Eval::Context というPerlモジュールがあります。