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<h2>Classes</h2>
<p>A class is a data type that can contain fields, constants, methods, properties, and signals. Class types support inheritance, a mechanism whereby a derived class can extend and specialize a base class.</p>
<h3>Class declarations<a id="declaration"> </a></h3>
<p>The simplest class declaration looks like this:</p>
<pre>
class ClassName {
<class-member>
}</pre>
<p>As class types support inheritance, you can specify a base class you want to derive from:</p>
<pre>
class ClassName : BaseClassName {
<class-member>
}</pre>
<div class="note">
<h4>GObject Note</h4>
<p>It's recommended that you derive all your classes directly or indirectly from GLib.Object, unless you have a strong reason not to. Some class features are not supported for classes not deriving from GLib.Object.</p>
</div>
<p>Classes cannot have multiple base classes, however they may implement multiple interfaces:</p>
<pre>
class ClassName : BaseClassName, FirstInterfaceName, SecondInterfaceName {
<class-member>
}</pre>
<p>You may optionally specify an accessibility modifier. Classes support <code>public</code> and <code>private</code> accessibility and default to private if you don't specify one. Public classes may be accessed from outside the library or application they are defined in.</p>
<pre>
public class ClassName {
<class-member>
}</pre>
<p>The <code>abstract</code> modifier may be placed between the optional accessibility modifier and the class name to define an abstract class. An abstract class cannot be instantiated and is used as a base class for derived classes.</p>
<pre>
abstract class ClassName {
<class-member>
}</pre>
<p>The <code>static</code> modifier may be placed between the optional accessibility modifier and the class name to define a static class. A static class cannot be instantiated and may not have a base class. It can also not be used as a base class for derived classes and may only contain static members. Static classes are implicitly abstract, you may not use both modifiers, <code>abstract</code> and <code>static</code>, in the same class declaration.</p>
<pre>
static class ClassName {
<class-member>
}</pre>
<p>You may optionally prefix the class name with a namespace name. This places the class in the specified namespace without the need for a separate namespace declaration.</p>
<pre>
class NamespaceName.ClassName {
<class-member>
}</pre>
<h3>Fields<a id="fields"> </a></h3>
<p>Documentation</p>
<h3>Methods<a id="methods"> </a></h3>
<p>Documentation</p>
<h3>Properties<a id="properties"> </a></h3>
<blockquote>
property-declaration:
[ access-modifier ] [ member-modifiers ] type identifier <span class="literal">{</span> accessor-declarations [ default-value ] <span class="literal">}</span> <span class="literal">;</span>
accessor-declarations:
get-accessor [ set-accessor ]
set-accessor [ get-accessor ]
get-accessor:
[ access-modifier ] <span class="literal">get</span> <span class="literal">;</span>
[ access-modifier ] <span class="literal">get</span> <span class="literal">{</span> statement-list <span class="literal">}</span>
set-accessor:
[ access-modifier ] <span class="literal">set</span> [ <span class="literal">construct</span> ] <span class="literal">;</span>
[ access-modifier ] <span class="literal">set</span> [ <span class="literal">construct</span> ] <span class="literal">{</span> statement-list <span class="literal">}</span>
default-value:
<span class="literal">default =</span> expression <span class="literal">;</span>
</blockquote>
<h3>Signals<a id="signals"> </a></h3>
<p>The signal system allows objects to emit signals that can be handled by user-provided signal handlers.</p>
<blockquote>
signal-declaration:
[ access-modifier ] <span class="literal">signal</span> return-type identifier <span class="literal">(</span> [ parameter-list ] <span class="literal">)</span> <span class="literal">;</span>
</blockquote>
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