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.IX Title "Devel::Cover::Truth_Table 3pm"
.TH Devel::Cover::Truth_Table 3pm "2021-02-02" "perl v5.32.1" "User Contributed Perl Documentation"
.\" For nroff, turn off justification.  Always turn off hyphenation; it makes
.\" way too many mistakes in technical documents.
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.nh
.SH "NAME"
Devel::Cover::Truth_Table \- Truth tables for coverage objects.
.SH "VERSION"
.IX Header "VERSION"
version 1.36
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
.Vb 1
\&  use Devel::Cover::Truth_Table;
\&
\&  # $a || $b
\&  my $or_tt  = Devel::Cover::Truth_Table\->new_primitive(\*(Aqor_3\*(Aq, 0, 1, 1);
\&
\&  # $c && $d
\&  my $and_tt = Devel::Cover::Truth_Table\->new_primitive(\*(Aqand_3\*(Aq, 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 = $or_tt\->sort\->text;
\&  print "$_\en" foreach @text;
\&
\&  _\|_END_\|_
\&  A B C |exp|hit
\&  \-\-\-\-\-\-\-\-\-\-\-\-\-\-
\&  0 0 X | 0 |\-\-\-
\&  0 1 0 | 0 |\-\-\-
\&  0 1 1 | 1 |+++
\&  1 X X | 1 |+++
\&  \-\-\-\-\-\-\-\-\-\-\-\-\-\-
.Ve
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
This module provides methods for creating and merging conditional
primitives (\f(CW\*(C`$a && $b\*(C'\fR, \f(CW\*(C`$c || $d\*(C'\fR, etc.) into more complex composite
expressions.
.SH "METHODS"
.IX Header "METHODS"
.ie n .SS "new_primitive($op, @coverage)"
.el .SS "new_primitive($op, \f(CW@coverage\fP)"
.IX Subsection "new_primitive($op, @coverage)"
Create a new truth table based on one of the built-in primitives, which
are the subclasses of Devel::Cover::DB::Condition. \f(CW$op\fR is one of the
following:
.IP "and_3" 4
.IX Item "and_3"
\&\f(CW\*(C`and\*(C'\fR or \f(CW\*(C`&&\*(C'\fR with three conditional paths.
.IP "or_3" 4
.IX Item "or_3"
\&\f(CW\*(C`or\*(C'\fR or \f(CW\*(C`||\*(C'\fR with three conditional paths.
.IP "or_2" 4
.IX Item "or_2"
\&\f(CW\*(C`or\*(C'\fR or \f(CW\*(C`||\*(C'\fR with two conditional paths. (i.e., when the right hand
side of the expression is a constant)
.IP "xor_4" 4
.IX Item "xor_4"
\&\f(CW\*(C`xor\*(C'\fR with four conditional paths.
.PP
\&\f(CW@coverage\fR is a list booleans identifying which of the possible paths
have been covered.
.SS "\fBsort()\fP"
.IX Subsection "sort()"
Sorts a truth table (in place) and returns the sorted object.
.SS "\fBtext()\fP"
.IX Subsection "text()"
Format a truth table to an array of strings for printing.
.SS "\fBhtml()\fP"
.IX Subsection "html()"
Format a truth table in \s-1HTML.\s0
.SS "\fBerror()\fP"
.IX Subsection "error()"
.SS "\fBpercentage()\fP"
.IX Subsection "percentage()"
Determines the proportion of possible conditions that have coverage.
.SS "right_merge($sub_table)"
.IX Subsection "right_merge($sub_table)"
Merge entries from \f(CW$sub_table\fR into right column of table.
.SS "left_merge($sub_table)"
.IX Subsection "left_merge($sub_table)"
Merge entries from \f(CW$sub_table\fR into left column of table.
.SH "SEE ALSO"
.IX Header "SEE ALSO"
Devel::Cover
.SH "BUGS"
.IX Header "BUGS"
None that I'm aware of...
.SH "LICENSE"
.IX Header "LICENSE"
Copyright 2002 Michael Carman <mjcarman@mchsi.com>
.PP
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