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Manual Reference Pages  -  DECLARE::CONSTRAINTS::SIMPLE::LIBRARY::ARRAY (3)

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NAME

Declare::Constraints::Simple::Library::Array - Array Constraints

CONTENTS

SYNOPSIS



  # accept a list of pairs
  my $pairs_validation = IsArrayRef( HasArraySize(2,2) );

  # integer => object pairs
  my $pairs = And( OnEvenElements(IsInt),
                   OnOddElements(IsObject) );

  # a three element array
  my $tri = And( HasArraySize(3,3),
                 OnArrayElements(0, IsInt,
                                 1, IsDefined,
                                 2, IsClass) );



DESCRIPTION

This module contains all constraints that can be applied to array references.

CONSTRAINTS

    HasArraySize([$min, [$max]])

With $min defaulting to 1. So a specification of



  my $profile = HasArraySize;



checks for at least one value. To force an exact size of the array, specify the same values for both:



  my $profile = HasArraySize(3, 3);



OnArrayElements($key => CW$constraint, CW$key => CW$constraint, ...)

Applies the the $constraints to the corresponding $keys if they are present. For required keys see HasArraySize.

    OnEvenElements($constraint)

Runs the constraint on all even elements of an array. See also OnOddElements.

    OnOddElements($constraint)

Runs the constraint on all odd elements of an array. See also OnEvenElements.

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.
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perl v5.20.3 DECLARE::CONSTRAINTS::SIMPLE::LIBRARY::ARRAY (3) 2006-09-14

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