Commit | Line | Data |
952306ac |
1 | #!./perl -w |
2 | |
3 | BEGIN { |
4 | chdir 't' if -d 't'; |
5 | @INC = '../lib'; |
6 | require './test.pl'; |
7 | } |
8 | |
9 | use strict; |
10 | |
11 | plan tests => 19; |
12 | |
13 | ok( ! defined state $uninit, q(state vars are undef by default) ); |
14 | |
15 | sub stateful { |
16 | state $x; |
17 | state $y = 1; |
18 | my $z = 2; |
19 | return ($x++, $y++, $z++); |
20 | } |
21 | |
22 | my ($x, $y, $z) = stateful(); |
23 | is( $x, 0, 'uninitialized state var' ); |
24 | is( $y, 1, 'initialized state var' ); |
25 | is( $z, 2, 'lexical' ); |
26 | |
27 | ($x, $y, $z) = stateful(); |
28 | is( $x, 1, 'incremented state var' ); |
29 | is( $y, 2, 'incremented state var' ); |
30 | is( $z, 2, 'reinitialized lexical' ); |
31 | |
32 | ($x, $y, $z) = stateful(); |
33 | is( $x, 2, 'incremented state var' ); |
34 | is( $y, 3, 'incremented state var' ); |
35 | is( $z, 2, 'reinitialized lexical' ); |
36 | |
37 | sub nesting { |
38 | state $foo = 10; |
39 | my $t; |
40 | { state $bar = 12; $t = ++$bar } |
41 | ++$foo; |
42 | return ($foo, $t); |
43 | } |
44 | |
45 | ($x, $y) = nesting(); |
46 | is( $x, 11, 'outer state var' ); |
47 | is( $y, 13, 'inner state var' ); |
48 | |
49 | ($x, $y) = nesting(); |
50 | is( $x, 12, 'outer state var' ); |
51 | is( $y, 14, 'inner state var' ); |
52 | |
53 | sub generator { |
54 | my $outer; |
55 | # we use $outer to generate a closure |
56 | sub { ++$outer; ++state $x } |
57 | } |
58 | |
59 | my $f1 = generator(); |
60 | is( $f1->(), 1, 'generator 1' ); |
61 | is( $f1->(), 2, 'generator 1' ); |
62 | my $f2 = generator(); |
63 | is( $f2->(), 1, 'generator 2' ); |
64 | is( $f1->(), 3, 'generator 1 again' ); |
65 | is( $f2->(), 2, 'generator 2 once more' ); |