NAME

       Declare::Constraints::Simple::Library::Scalar - Scalar Constraints

SYNOPSIS

         # match one of a set of regexes
         my $some_regexes = Matches(qr/foo/, qr/bar/);

         # allow only defined values
         my $is_defined = IsDefined;

         # between 5 and 50 chars
         my $five_to_fifty = HasLength(5, 50);

         # match against a set of values
         my $command_constraint = IsOneOf(qw(create update delete));

         # check for trueness
         my $is_true = IsTrue;

         # simple equality
         my $is_foo = IsEq('foo');

DESCRIPTION

       This library contains all constraints to validate scalar values.

CONSTRAINTS

   Matches(@regex)
         my $c = Matches(qr/foo/, qr/bar/);

       If one of the parameters matches the expression, this is true.

   IsDefined()
       True if the value is defined.

   HasLength([$min, [$max]])
       Is true if the value has a length above $min (which defaults to 1> and, if supplied, under
       the value of $max. A simple

         my $c = HasLength;

       checks if the value has a length of at least 1.

   IsOneOf(@values)
       True if one of the @values equals the passed value. "undef" values work with this too, so

         my $c = IsOneOf(1, 2, undef);

       will return true on an undefined value.

   IsTrue()
       True if the value evulates to true in boolean context.

   IsEq($comparator)
       Valid if the value is "eq" the $comparator.

SEE ALSO

       Declare::Constraints::Simple, Declare::Constraints::Simple::Library

AUTHOR

       Robert 'phaylon' Sedlacek "<phaylon@dunkelheit.at>"

LICENSE AND COPYRIGHT

       This module is free software, you can redistribute it and/or modify it under the same
       terms as perl itself.

perl v5.32.0                                202Declare::Constraints::Simple::Library::Scalar(3pm)