Glib::Variant(3)

NAME
Glib::Variant - strongly typed value datatype

SYNOPSIS
  my $v = Glib::Variant->new ('as', ['GTK+', 'Perl']);
  my $aref = $v->get ('as');

DESCRIPTION
There are two sets of APIs for creating and dealing with "Glib::Variant"s: the low-level API described below under "METHODS", and the convenience API described in this section.

  CONVENIENCE API

variant = Glib::Variant->new ($format_string, $value)
(variant1, ...) = Glib::Variant->new ($format_string, $value1, ...)
    Constructs a variant from $format_string and $value. Also supports constructing multiple variants when the format string is a concatenation of multiple types.

value = $variant->get ($format_string)
    Deconstructs $variant according to $format_string.

The following symbols are currently supported in format strings:

  +------------------------------+---------------------------------+
  |            Symbol            |             Meaning             |
  +------------------------------+---------------------------------+
  | b, y, n, q, i, u, x, t, h, d | Boolean, byte and numeric types |
  | s, o, g                      | String types                    |
  | v                            | Variant types                   |
  | a                            | Arrays                          |
  | m                            | Maybe types                     |
  | ()                           | Tuples                          |
  | {}                           | Dictionary entries              |
  +------------------------------+---------------------------------+

Note that if a format string specifies an array, a tuple or a dictionary entry ("a", "()" or "{}"), then array references are expected by "new" and produced by "get". For arrays of dictionary entries ("a{}"), hash references are also supported by "new" and handled as you would expect.

For a complete specification, see the documentation at

<https://developer.gnome.org/glib/stable/glib-GVariantType.html>
<https://developer.gnome.org/glib/stable/glib-GVariant.html>
<https://developer.gnome.org/glib/stable/gvariant-format-strings.html>
<https://developer.gnome.org/glib/stable/gvariant-text.html>

HIERARCHY
  Glib::Variant

METHODS

  variant = Glib::Variant->new_array ($child_type, $children)

•   $child_type (Glib::VariantType)

•   $children (scalar)

  variant = Glib::Variant->new_boolean ($value)

•   $value (boolean)

  variant = Glib::Variant->new_byte ($value)

•   $value (Glib::UChar)

  variant = Glib::Variant->new_bytestring ($string)

•   $string (byte string)

Since: glib 2.26

  variant = Glib::Variant->new_dict_entry ($key, $value)

•   $key (Glib::Variant)

•   $value (Glib::Variant)

  variant = Glib::Variant->new_double ($value)

•   $value (double)

  variant = Glib::Variant->new_handle ($value)

•   $value (integer)

  variant = Glib::Variant->new_int16 ($value)

•   $value (integer)

  variant = Glib::Variant->new_int32 ($value)

•   $value (integer)

  variant = Glib::Variant->new_int64 ($value)

•   $value (64 bit integer)

  variant = Glib::Variant->new_maybe ($child_type, $child)

•   $child_type (Glib::VariantType)

•   $child (Glib::Variant)

  variant = Glib::Variant->new_object_path ($object_path)

•   $object_path (string)

  variant = Glib::Variant->new_signature ($signature)

•   $signature (string)

  variant = Glib::Variant->new_string ($string)

•   $string (string)

  variant = Glib::Variant->new_tuple ($children)

•   $children (scalar)

  variant = Glib::Variant->new_uint16 ($value)

•   $value (unsigned)

  variant = Glib::Variant->new_uint32 ($value)

•   $value (unsigned)

  variant = Glib::Variant->new_uint64 ($value)

•   $value (64 bit unsigned)

  variant = Glib::Variant->new_variant ($value)

•   $value (Glib::Variant)

  boolean = $value->get_boolean

  uchar = $value->get_byte

  string = $value->get_bytestring
Since: glib 2.26

  variant = $value->byteswap

  variant = $value->get_child_value ($index_)

•   $index_ (unsigned)

  string = $value->classify

  integer = $one->compare ($two)

•   $two (Glib::Variant)

Since: glib 2.26

  double = $value->get_double

  boolean = $one->equal ($two)

•   $two (Glib::Variant)

  integer = $value->get_handle

  integer = $value->hash

  integer = $value->get_int16

  integer = $value->get_int32

  64 bit integer = $value->get_int64

  boolean = $value->is_container

  boolean = $value->is_normal_form

  boolean = $string->is_object_path

  boolean = $value->is_of_type ($type)

•   $type (Glib::VariantType)

  boolean = $string->is_signature

  variant = $dictionary->lookup_value ($key, $expected_type)

•   $key (string)

•   $expected_type (Glib::VariantType)

Since: glib 2.28

  variant = $value->get_maybe

  unsigned = $value->n_children

  variant = $value->get_normal_form

  variant = Glib::Variant::parse ($type, $text)

•   $type (Glib::VariantType)

•   $text (string)

May croak with a Glib::Error in $@ on failure.

  string = $value->print ($type_annotate)

•   $type_annotate (boolean)

  unsigned = $value->get_size

  string = $value->get_string

  varianttype = $value->get_type

  string = $value->get_type_string

  unsigned = $value->get_uint16

  unsigned = $value->get_uint32

  64 bit unsigned = $value->get_uint64

  variant = $value->get_variant

SEE ALSO
Glib, Glib::VariantType, Glib::VariantDict

COPYRIGHT
Copyright (C) 2003-2011 by the gtk2-perl team.

This software is licensed under the LGPL. See Glib for a full notice.