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mention and public access

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git-svn-id: https://swig.svn.sourceforge.net/svnroot/swig/trunk@9899 626c5289-ae23-0410-ae9c-e8d60b6d4f22
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William S Fulton 2007-08-15 20:36:40 +00:00
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10
Doc/Manual/SWIGPlus.html
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@ -46,7 +46,7 @@
<li><a href="#SWIGPlus_nn27">Comments on overloading</a>
</ul>
<li><a href="#SWIGPlus_nn28">Wrapping overloaded operators</a>
<li><a href="#SWIGPlus_nn29">Class extension</a>
<li><a href="#SWIGPlus_class_extension">Class extension</a>
<li><a href="#SWIGPlus_nn30">Templates</a>
<li><a href="#SWIGPlus_nn31">Namespaces</a>
<li><a href="#SWIGPlus_renaming_templated_types_namespaces">Renaming templated types in namespaces</a>
@ -2731,7 +2731,7 @@ are ignored as well as conversion operators.
</li>
</ul>
<H2><a name="SWIGPlus_nn29"></a>6.17 Class extension</H2>
<H2><a name="SWIGPlus_class_extension"></a>6.17 Class extension</H2>
<p>
@ -2786,6 +2786,8 @@ command.
The C++ 'this' pointer is often needed to access member variables, methods etc.
The <tt>$self</tt> special variable should be used wherever you could use 'this'.
The example above demonstrates this for accessing member variables.
Note that the members dereferenced by <tt>$self</tt> must be public members as the code is ultimately generated
into a global function and so will not have any access to non-public members.
The implicit 'this' pointer that is present in C++ methods is not present in <tt>%extend</tt> methods.
In order to access anything in the extended class or its base class, an explicit 'this' is required.
The following example shows how one could access base class members:
@ -2802,8 +2804,8 @@ struct Derived : Base {
};
%extend Derived {
virtual void method(int v) {
$self-&gt;Base::method(v);
$self-&gt;value = v;
$self-&gt;Base::method(v); // akin to this-&gt;Base::method(v);
$self-&gt;value = v; // akin to this-&gt;value = v;
...
}
}