1#!./perl 2 3BEGIN { 4 unless (-d 'blib') { 5 chdir 't' if -d 't'; 6 } 7 require q(./test.pl); 8 set_up_inc('../lib'); 9} 10 11use strict; 12use warnings; 13 14use utf8; 15use open qw( :utf8 :std ); 16 17plan(tests => 1); 18 19require mro; 20 21=pod 22 23This example is take from: http://www.python.org/2.3/mro.html 24 25"Serious order disagreement" # From Guido 26class O: pass 27class X(O): pass 28class Y(O): pass 29class A(X,Y): pass 30class B(Y,X): pass 31try: 32 class Z(A,B): pass #creates Z(A,B) in Python 2.2 33except TypeError: 34 pass # Z(A,B) cannot be created in Python 2.3 35 36=cut 37 38{ 39 package ẋ; 40 41 package Ƴ; 42 43 package ẋƳ; 44 our @ISA = ('ẋ', 'Ƴ'); 45 46 package Ƴẋ; 47 our @ISA = ('Ƴ', 'ẋ'); 48 49 package Ȥ; 50 our @ISA = ('ẋƳ', 'Ƴẋ'); 51} 52 53eval { mro::get_linear_isa('Ȥ', 'c3') }; 54like($@, qr/^Inconsistent /, '... got the right error with an inconsistent hierarchy'); 55