Commit | Line | Data |
---|---|---|
e1a479c5 BB |
1 | #!./perl |
2 | ||
e1a479c5 BB |
3 | BEGIN { |
4 | unless (-d 'blib') { | |
5 | chdir 't' if -d 't'; | |
e1a479c5 | 6 | } |
624c42e2 N |
7 | require q(./test.pl); |
8 | set_up_inc('../lib'); | |
e1a479c5 BB |
9 | } |
10 | ||
0b1b7115 JH |
11 | use strict; |
12 | use warnings; | |
13 | ||
624c42e2 | 14 | plan(tests => 1); |
e1a479c5 | 15 | |
b2685f0c NC |
16 | require mro; |
17 | ||
e1a479c5 BB |
18 | =pod |
19 | ||
20 | This example is take from: http://www.python.org/2.3/mro.html | |
21 | ||
22 | "Serious order disagreement" # From Guido | |
23 | class O: pass | |
24 | class X(O): pass | |
25 | class Y(O): pass | |
26 | class A(X,Y): pass | |
27 | class B(Y,X): pass | |
28 | try: | |
29 | class Z(A,B): pass #creates Z(A,B) in Python 2.2 | |
30 | except TypeError: | |
31 | pass # Z(A,B) cannot be created in Python 2.3 | |
32 | ||
33 | =cut | |
34 | ||
35 | { | |
36 | package X; | |
37 | ||
38 | package Y; | |
39 | ||
40 | package XY; | |
41 | our @ISA = ('X', 'Y'); | |
42 | ||
43 | package YX; | |
44 | our @ISA = ('Y', 'X'); | |
45 | ||
46 | package Z; | |
47 | our @ISA = ('XY', 'YX'); | |
48 | } | |
49 | ||
50 | eval { mro::get_linear_isa('Z', 'c3') }; | |
c3e4944b NC |
51 | like($@, qr/^Inconsistent hierarchy during C3 merge of class 'Z'/, |
52 | '... got the right error with an inconsistent hierarchy'); |