Devel::Cover::Truth_Table(3p)

NAME
Devel::Cover::Truth_Table - Truth tables for coverage objects.

VERSION
version 1.44

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