Devel::Cover::Truth_Table(3pm)
NAME
Devel::Cover::Truth_Table - Create and manipulate truth tables for
coverage objects.
SYNOPSIS
use Devel::Cover::Truth_Table;
# $a || $b
my $or_tt = Devel::Cover::Truth_Table->new_primitive('or_3', 0, 1, 1);
# $c && $d
my $and_tt = Devel::Cover::Truth_Table->new_primitive('and_3', 1, 0, 1);
# merge contents of $and_tt into right column of $or_tt, to create
# $a || ($c && $d)
$or_tt->right_merge($and_tt);
# get a (sorted) textual representation
my @text = $or_tt->sort->text;
print "$_\n" foreach @text;
__END__
A B C |exp|hit
--------------
0 0 X | 0 |---
0 1 0 | 0 |---
0 1 1 | 1 |+++
1 X X | 1 |+++
--------------
DESCRIPTION
This module provides methods for creating and merging conditional
primitives ("$a && $b", "$c || $d", etc.) into more complex composite
expressions.
METHODS
- new_primitive($op, @coverage)
- Create a new truth table based on one of the built-in primitives, which
are the subclasses of Devel::Cover::DB::Condition. $op is one of the
following: - and_3
"and" or "&&" with three conditional paths.
- or_3
"or" or "||" with three conditional paths.
- or_2
"or" or "||" with two conditional paths. (i.e., when the right hand side of the expression is a constant)
- xor_4
"xor" with four conditional paths.
- @coverage is a list booleans identifying which of the possible paths
have been covered. - sort()
- Sorts a truth table (in place) and returns the sorted object.
- text()
- Format a truth table to an array of strings for printing.
- html()
- Format a truth table in HTML.
- error()
percentage() - Determines the proportion of possible conditions that have coverage.
- right_merge($sub_table)
- Merge entries from $sub_table into right column of table.
- left_merge($sub_table)
- Merge entries from $sub_table into left column of table.
SEE ALSO
Devel::Cover
BUGS
None that I'm aware of...
VERSION
Version 0.68 - 5th August 2010
LICENSE
Copyright 2002 Michael Carman <mjcarman@mchsi.com>
- This software is free. It is licensed under the same terms as Perl
itself. The latest version should be available from:
http://www.pjcj.net