1 # NAME

3 Acme::Test::LogicalEquivalence - Test if expressions are logically equivalent

5 # VERSION

7 version 0.001

9 # SYNOPSIS

11 use Test::More;

12 use Acme::Test::LogicalEquivalence qw(is_logically_equivalent);

14 # test two expressions with 2 variables using the special vars $a and $b

15 is_logically_equivalent(2, sub { $a && $b }, sub { $b && $a });

17 # same as above

18 is_logically_equivalent(2, sub { $_[0] && $_[1] }, sub { $_[1] && $_[0] });

20 # you can do as many vars as you like

21 is_logically_equivalent(3, sub { $_[0] || ($_[1] && $_[2]) },

22 sub { ($_[0] || $_[1]) && ($_[0] || $_[2]) });

24 done_testing;

26 # DESCRIPTION

28 Some expressions are "logically equivalent" to other expressions, but it may not be easy to tell if

29 one or both of the expressions are reasonably complicated. Or maybe you're like many other people

30 and are too lazy to go through the effort... Either way, why not let your computer prove logical

31 equivalence for you?

33 # FUNCTIONS

35 ## is\_logically\_equivalent

37 Test logical equivalence of two subroutines.

39 my $is_equivalent = is_logically_equivalent($numvars, &sub1, &sub2);

41 This will execute both of the subroutines one or more times (depending on how many variables you

42 specify) with different inputs. The subroutines shall be considered logically equivalent if, for all

43 combinations of inputs, they both return the same thing.

45 Returns true if the subroutines are logically equivalent, false otherwise.

47 # SEE ALSO

49 - What is logical equivalence? Start here: [https://en.wikipedia.org/wiki/Logical\_equivalence](https://en.wikipedia.org/wiki/Logical_equivalence)

51 # AUTHOR

53 Charles McGarvey <chazmcgarvey@brokenzipper.com>

55 # COPYRIGHT AND LICENSE

57 This software is copyright (c) 2016 by Charles McGarvey.

59 This is free software; you can redistribute it and/or modify it under

60 the same terms as the Perl 5 programming language system itself.

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