Data::FormValidator::ConstraintsFactory - phpMan

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 AT iNsu.COM> Maintainer: Mark
    Stosberg <mark AT 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.

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