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Declare::Constraints::Simple::Library::Referencial.3pm
Langue: en
Version: 2006-09-11 (fedora - 01/12/10)
Section: 3 (Bibliothèques de fonctions)
Sommaire
NAME
Declare::Constraints::Simple::Library::Referencial - Ref ConstraintsSYNOPSIS
# scalar or array references my $scalar_or_array = IsRefType( qw(SCALAR ARRAY) ); # scalar reference my $int_ref = IsScalarRef( IsInt ); # accept mappings of ids to objects with "name" methods my $id_obj_map = IsHashRef( -keys => IsInt, -values => And( IsObject, HasMethods('name') )); # an integer list my $int_list = IsArrayRef( IsInt ); # accept code references my $is_closure = IsCodeRef; # accept a regular expression my $is_regex = IsRegex;
DESCRIPTION
This library contains those constraints that can test the validity of references and their types.CONSTRAINTS
IsRefType(@types)
Valid if the value is a reference of a kind in @types.IsScalarRef($constraint)
This is true if the value is a scalar reference. A possible constraint for the scalar references target value can be passed. E.g.my $test_integer_ref = IsScalarRef(IsInt);
IsArrayRef($constraint)
The value is valid if the value is an array reference. The contents of the array can be validated by passing an other $constraint as argument.The stack or path part of "IsArrayRef" is "IsArrayRef[$index]" where $index is the index of the failing element.
IsHashRef(-keys => $constraint, -values => $constraint)
True if the value is a hash reference. It can also take two named parameters: "-keys" can pass a constraint to check the hashes keys, "-values" does the same for its values.The stack or path part of "IsHashRef" looks like "IsHashRef[$type $key]" where $type is either "val" or "key" depending on what was validated, and $key being the key that didn't pass validation.
IsCodeRef()
Code references have to be valid to pass this constraint.IsRegex()
True if the value is a regular expression built with "qr". Note however, that a simple string that could be used like "/$rx/" will not pass this constraint. You can combine multiple constraints with And(@constraints) though.SEE ALSO
Declare::Constraints::Simple, Declare::Constraints::Simple::LibraryAUTHOR
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.Contenus ©2006-2024 Benjamin Poulain
Design ©2006-2024 Maxime Vantorre