NAME

       Data::FormValidator::ConstraintsFactory - Module to create constraints for
       HTML::FormValidator.

DESCRIPTION

       This module contains functions to help generate complex constraints.

       If you are writing new code, take a look at
       Data::FormValidator::Constraints::MethodsFactory instead. It's a modern alternative to
       what's here, offering improved names and syntax.

SYNOPSIS

           use Data::FormValidator::ConstraintsFactory qw( :set :bool );

           constraints => {
           param1 => make_or_constraint(
                   make_num_set_constraint( -1, ( 1 .. 10 ) ),
                   make_set_constraint( 1, ( 20 .. 30 ) ),
                 ),
           province => make_word_set_constraint( 1, "AB QC ON TN NU" ),
           bid  => make_range_constraint( 1, 1, 10 ),
           }

BOOLEAN CONSTRAINTS

       Those constraints are available by using the ":bool" tag.

   make_not_constraint( $c1 )
       This will create a constraint that will return the negation of the result of constraint
       $c1.

   make_or_constraint( @constraints )
       This will create a constraint that will return the result of the first constraint that
       return an non false result.

   make_and_constraint( @constraints )
       This will create a constraint that will return the result of the first constraint that
       return an non false result only if all constraints returns a non-false results.

SET CONSTRAINTS

       Those constraints are available by using the ":set" tag.

   make_set_constraint( $res, @elements )
       This will create a constraint that will return $res if the value is one of the @elements
       set, or the negation of $res otherwise.

       The "eq" operator is used for comparison.

   make_num_set_constraint( $res, @elements )
       This will create a constraint that will return $res if the value is one of the @elements
       set, or the negation of $res otherwise.

       The "==" operator is used for comparison.

   make_word_set_constraint( $res, $set )
       This will create a constraint that will return $res if the value is a word in $set, or the
       negation of $res otherwise.

   make_cmp_set_constraint( $res, $cmp, @elements )
       This will create a constraint that will return $res if the value is one of the @elements
       set, or the negation of $res otherwise.

       $cmp is a function which takes two argument and should return true or false depending if
       the two elements are equal.

NUMERICAL LOGICAL CONSTRAINTS

       Those constraints are available by using the ":num" tag.

   make_clamp_constraint( $res, $low, $high )
       This will create a constraint that will return $res if the value is between $low and $high
       bounds included or its negation otherwise.

   make_lt_constraint( $res, $bound )
       This will create a constraint that will return $res if the value is lower than $bound, or
       the negation of $res otherwise.

   make_le_constraint( $res, $bound )
       This will create a constraint that will return $res if the value is lower or equal than
       $bound, or the negation of $res otherwise.

   make_gt_constraint( $res, $bound )
       This will create a constraint that will return $res if the value is greater than $bound,
       or the negation of $res otherwise.

   make_ge_constraint( $res, $bound )
       This will create a constraint that will return $res if the value is greater or equal than
       $bound, or the negation of $res otherwise.

OTHER CONSTRAINTS

   make_length_constraint($max_length)
       This will create a constraint that will return true if the value has a length of less than
       or equal to $max_length

SEE ALSO

       Data::FormValidator(3)

AUTHOR

       Author: Francis J. Lacoste <francis.lacoste@iNsu.COM> Maintainer: Mark Stosberg
       <mark@summersault.com>

COPYRIGHT

       Copyright (c) 2000 iNsu Innovations Inc.  All rights reserved.

       This program is free software; you can redistribute it and/or modify it under the terms as
       perl itself.

perl v5.34.0                                2022-06-1Data::FormValidator::ConstraintsFactory(3pm)