1use Test::More tests => 7; 2 3BEGIN { use_ok('NEXT') }; 4my $order = 0; 5 6package A; 7@ISA = qw/B C D/; 8 9sub test { ::ok(++$order==1,"test A"); $_[0]->NEXT::UNSEEN::test; 1} 10 11package B; 12@ISA = qw/D C/; 13sub test { ::ok(++$order==2,"test B"); $_[0]->NEXT::UNSEEN::test; 1} 14 15package C; 16@ISA = qw/D/; 17sub test { ::ok(++$order==4,"test C"); $_[0]->NEXT::UNSEEN::test; 1} 18 19package D; 20 21sub test { ::ok(++$order==3,"test D"); $_[0]->NEXT::UNSEEN::test; 1} 22 23package main; 24 25my $foo = {}; 26 27bless($foo,"A"); 28 29eval{ $foo->test } 30 ? pass("Correctly survives after C") 31 : fail("Shouldn't die on missing ancestor"); 32 33package Diamond::Base; 34my $seen; 35sub test { 36 $seen++ ? ::fail("Can't visit inherited test twice") 37 : ::pass("First diamond is okay"); 38 shift->NEXT::UNSEEN::test; 39} 40 41package Diamond::Left; @ISA = qw[Diamond::Base]; 42package Diamond::Right; @ISA = qw[Diamond::Base]; 43package Diamond::Top; @ISA = qw[Diamond::Left Diamond::Right]; 44 45package main; 46 47Diamond::Top->test; 48