1Number::Tolerant::UnionU(s3e)r Contributed Perl DocumentaNtuimobner::Tolerant::Union(3)
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NAME

6       Number::Tolerant::Union - unions of tolerance ranges
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VERSION

9       version 1.708
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SYNOPSIS

12        use Number::Tolerant;
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14        my $range1 = tolerance(10 => to => 12);
15        my $range2 = tolerance(14 => to => 16);
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17        my $union = $range1 | $range2;
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19        if ($11 == $union) { ... } # this will happen
20        if ($12 == $union) { ... } # so will this
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22        if ($13 == $union) { ... } # nothing will happen here
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24        if ($14 == $union) { ... } # this will happen
25        if ($15 == $union) { ... } # so will this
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DESCRIPTION

28       Number::Tolerant::Union is used by Number::Tolerant to represent the
29       union of multiple tolerances.  A subset of the same operators that
30       function on a tolerance will function on a union of tolerances, as
31       listed below.
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METHODS

34   new
35         my $union = Number::Tolerant::Union->new(@list_of_tolerances);
36
37       There is a "new" method on the Number::Tolerant::Union class, but
38       unions are meant to be created with the "|" operator on a
39       Number::Tolerant tolerance.
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41       The arguments to "new" are a list of numbers or tolerances to be
42       unioned.
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44       Intersecting ranges are not converted into a single range, but this may
45       change in the future.  (For example, the union of "5 to 10" and "7 to
46       12" is not "5 to 12.")
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48   options
49       This method will return a list of all the acceptable options for the
50       union.
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52   Overloading
53       Tolerance unions overload a few operations, mostly comparisons.
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55       numification
56           Unions numify to undef.  If there's a better idea, I'd love to hear
57           it.
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59       stringification
60           A tolerance stringifies to a short description of itself.  This is
61           a set of the union's options, parentheses-enclosed and joined by
62           the word "or"
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64       equality
65           A number is equal to a union if it is equal to any of its options.
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67       comparison
68           A number is greater than a union if it is greater than all its
69           options.
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71           A number is less than a union if it is less than all its options.
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73       union intersection
74           An intersection ("&") with a union is commutted across all options.
75           In other words:
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77            (a | b | c) & d  ==yields==> ((a & d) | (b & d) | (c & d))
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79           Options that have no intersection with the new element are dropped.
80           The intersection of a constant number and a union yields that
81           number, if the number was in the union's ranges and otherwise
82           yields nothing.
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TODO

85       Who knows.  Collapsing overlapping options, probably.
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AUTHOR

88       Ricardo Signes <rjbs@cpan.org>
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91       This software is copyright (c) 2004 by Ricardo Signes.
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93       This is free software; you can redistribute it and/or modify it under
94       the same terms as the Perl 5 programming language system itself.
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98perl v5.30.1                      2020-01-30        Number::Tolerant::Union(3)
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