NAME¶
Devel::Cover::Truth_Table - Create and manipulate truth tables for coverage
objects.
VERSION¶
version 0.89
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...
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