1Declare::Constraints::SUismeprleC:o:nLtDirebicrblauartryee:d:::SPCceoarnllsatrDr(oa3ci)unmtesn:t:aStiimopnle::Library::Scalar(3)
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NAME

6       Declare::Constraints::Simple::Library::Scalar - Scalar Constraints
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SYNOPSIS

9         # match one of a set of regexes
10         my $some_regexes = Matches(qr/foo/, qr/bar/);
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12         # allow only defined values
13         my $is_defined = IsDefined;
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15         # between 5 and 50 chars
16         my $five_to_fifty = HasLength(5, 50);
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18         # match against a set of values
19         my $command_constraint = IsOneOf(qw(create update delete));
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21         # check for trueness
22         my $is_true = IsTrue;
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24         # simple equality
25         my $is_foo = IsEq('foo');
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DESCRIPTION

28       This library contains all constraints to validate scalar values.
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CONSTRAINTS

31   Matches(@regex)
32         my $c = Matches(qr/foo/, qr/bar/);
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34       If one of the parameters matches the expression, this is true.
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36   IsDefined()
37       True if the value is defined.
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39   HasLength([$min, [$max]])
40       Is true if the value has a length above $min (which defaults to 1> and,
41       if supplied, under the value of $max. A simple
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43         my $c = HasLength;
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45       checks if the value has a length of at least 1.
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47   IsOneOf(@values)
48       True if one of the @values equals the passed value. "undef" values work
49       with this too, so
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51         my $c = IsOneOf(1, 2, undef);
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53       will return true on an undefined value.
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55   IsTrue()
56       True if the value evulates to true in boolean context.
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58   IsEq($comparator)
59       Valid if the value is "eq" the $comparator.
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SEE ALSO

62       Declare::Constraints::Simple, Declare::Constraints::Simple::Library
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AUTHOR

65       Robert 'phaylon' Sedlacek "<phaylon@dunkelheit.at>"
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68       This module is free software, you can redistribute it and/or modify it
69       under the same terms as perl itself.
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73perl v5.28.0                  Decl2a0r0e6:-:0C9o-n1s1traints::Simple::Library::Scalar(3)
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