Declare::Constraints::Simple::Library::Scalar - Scalar Constraints
# 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');
This library contains all constraints to validate scalar values.
my $c = Matches(qr/foo/, qr/bar/);
If one of the parameters matches the expression, this is true.
True if the value is defined.
Is true if the value has a length above $min (which defaults to 1> and, if supplied, under the value of $max. A simple
$min
$max
my $c = HasLength;
checks if the value has a length of at least 1.
True if one of the @values equals the passed value. undef values work with this too, so
@values
undef
my $c = IsOneOf(1, 2, undef);
will return true on an undefined value.
True if the value evulates to true in boolean context.
Valid if the value is eq the $comparator.
eq
$comparator
Declare::Constraints::Simple, Declare::Constraints::Simple::Library
Robert 'phaylon' Sedlacek <phaylon@dunkelheit.at>
<phaylon@dunkelheit.at>
This module is free software, you can redistribute it and/or modify it under the same terms as perl itself.
To install Declare::Constraints::Simple, copy and paste the appropriate command in to your terminal.
cpanm
cpanm Declare::Constraints::Simple
CPAN shell
perl -MCPAN -e shell install Declare::Constraints::Simple
For more information on module installation, please visit the detailed CPAN module installation guide.