1Devel::Cover::Truth_TabUlsee(r3)Contributed Perl DocumenDteavteilo:n:Cover::Truth_Table(3)
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NAME

6       Devel::Cover::Truth_Table - Create and manipulate truth tables for
7       coverage objects.
8

SYNOPSIS

10         use Devel::Cover::Truth_Table;
11
12         # $a || $b
13         my $or_tt  = Devel::Cover::Truth_Table->new_primitive('or_3', 0, 1, 1);
14
15         # $c && $d
16         my $and_tt = Devel::Cover::Truth_Table->new_primitive('and_3', 1, 0, 1);
17
18         # merge contents of $and_tt into right column of $or_tt, to create
19         # $a || ($c && $d)
20         $or_tt->right_merge($and_tt);
21
22         # get a (sorted) textual representation
23         my @text = $or_tt->sort->text;
24         print "$_\n" foreach @text;
25
26         __END__
27         A B C |exp|hit
28         --------------
29         0 0 X | 0 |---
30         0 1 0 | 0 |---
31         0 1 1 | 1 |+++
32         1 X X | 1 |+++
33         --------------
34

DESCRIPTION

36       This module provides methods for creating and merging conditional
37       primitives ("$a && $b", "$c || $d", etc.) into more complex composite
38       expressions.
39

METHODS

41   new_primitive($op, @coverage)
42       Create a new truth table based on one of the built-in primitives, which
43       are the subclasses of Devel::Cover::DB::Condition. $op is one of the
44       following:
45
46       and_3
47           "and" or "&&" with three conditional paths.
48
49       or_3
50           "or" or "||" with three conditional paths.
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52       or_2
53           "or" or "||" with two conditional paths. (i.e., when the right hand
54           side of the expression is a constant)
55
56       xor_4
57           "xor" with four conditional paths.
58
59       @coverage is a list booleans identifying which of the possible paths
60       have been covered.
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62   sort()
63       Sorts a truth table (in place) and returns the sorted object.
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65   text()
66       Format a truth table to an array of strings for printing.
67
68   html()
69       Format a truth table in HTML.
70
71   error()
72   percentage()
73       Determines the proportion of possible conditions that have coverage.
74
75   right_merge($sub_table)
76       Merge entries from $sub_table into right column of table.
77
78   left_merge($sub_table)
79       Merge entries from $sub_table into left column of table.
80

SEE ALSO

82       Devel::Cover
83

BUGS

85       None that I'm aware of...
86

VERSION

88       Version 0.65 - 8th August 2009
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LICENSE

91       Copyright 2002 Michael Carman <mjcarman@mchsi.com>
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93       This software is free. It is licensed under the same terms as Perl
94       itself. The latest version should be available from:
95       http://www.pjcj.net
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99perl v5.10.1                      2009-08-08      Devel::Cover::Truth_Table(3)
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