NAME

 Class::Params - Parameter utils for constructor.

SYNOPSIS

 use Class::Params qw(params);
 params($self, $def_hr, $params_ar);

DEFINITION FORMAT

 There is hash with parameters.
 internal_name => [real_name, class, possible_types, requirement]

 Example:
 'par1' => ['_par1', undef, 'SCALAR', 1],
 'par2' => ['_par2', undef, ['SCALAR', 'HASH'], 0],
 'par3' => ['_par3', 'Class', ['SCALAR', 'Class'], 0],

SUBROUTINES

params($self, $def_hr, $params_ar)

 Check for structure over definition and save input data to $self.
 Parameters:
 $self - Structure, for data save.
 $def_hr - Definition hash ref.
 $params_ar - Reference to array of key-value pairs.
 Returns undef.

ERRORS

 params():
         Bad parameter '%s' type.
         Parameter '%s' is required.
         Unknown parameter '%s'.

EXAMPLE1

 # Pragmas.
 use strict;
 use warnings;

 # Modules.
 use Class::Params qw(params);

 # Definition.
 my $self = {};
 my $def_hr = {
         'par' => ['_par', undef, 'SCALAR', 1],
 };

 # Check.
 # output_structure, definition, array of pairs (key, value).
 params($self, $def_hr, ['bad_par', 1]);

 # Output:
 # Unknown parameter 'bad_par'.

EXAMPLE2

 # Pragmas.
 use strict;
 use warnings;

 # Modules.
 use Class::Params qw(params);
 use Data::Printer;

 # Definition.
 my $self = {};
 my $def_hr = {
         'par' => ['_par', undef, 'SCALAR', 1],
 };

 # Check.
 # output_structure, definition, array of pairs (key, value).
 params($self, $def_hr, ['par', 1]);

 # Dump $self.
 p $self;

 # Output:
 # \ {
 #     _par   1
 # }

EXAMPLE3

 # Pragmas.
 use strict;
 use warnings;

 # Modules.
 use Class::Params qw(params);

 # Definition.
 my $self = {};
 my $def_hr = {
         'par' => ['_par', 'Moo', ['ARRAY', 'Moo'], 0],
 };

 # Fake class.
 my $moo = bless {}, 'Moo';

 # Check bad 'par' parameter which has bad 'bar' scalar.
 params($self, $def_hr, ['par', [$moo, 'bar']]);

 # Output like:
 # Bad parameter 'par' class.

EXAMPLE4

 # Pragmas.
 use strict;
 use warnings;

 # Modules.
 use Class::Params qw(params);
 use Data::Printer;

 # Definition.
 my $self = {};
 my $def_hr = {
         'par' => ['_par', 'Moo', ['ARRAY', 'Moo'], 0],
 };

 # Fake class.
 my $moo = bless {}, 'Moo';

 # Check right 'par' parameter which has array of 'Moo' objects.
 params($self, $def_hr, ['par', [$moo, $moo]]);

 # Dump $self.
 p $self;

 # Output like:
 # \ {
 #     _par   [
 #         [0] Moo  {
 #             public methods (0)
 #             private methods (0)
 #             internals: {}
 #         },
 #         [1] var{_par}[0]
 #     ]
 # }

DEPENDENCIES

Error::Pure, Exporter, Readonly, Scalar::Util.

REPOSITORY

https://github.com/tupinek/Class-Params

AUTHOR

Michal Špaček skim@cpan.org

LICENSE AND COPYRIGHT

BSD license.

VERSION

0.03