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Add some notes about \%extend and constructors

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git-svn-id: https://swig.svn.sourceforge.net/svnroot/swig/trunk@11573 626c5289-ae23-0410-ae9c-e8d60b6d4f22
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William S Fulton 2009-08-14 22:11:27 +00:00
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@ -2388,6 +2388,10 @@ You can make a <tt>Vector</tt> look a lot like a class by writing a SWIG interfa
<p>
Note the usage of the <tt>$self</tt> special variable.
Its usage is identical to a C++ 'this' pointer and should be used whenever access to the struct instance is required.
Also note that C++ constructor and destructor syntax has been used to simulate a constructor and destructor, even for C code.
There is one subtle difference to a normal C++ constructor implementation though and that is although the constructor declaration
is as per a normal C++ constructor, the newly constructed object must be returned <b>as if</b> the constructor declaration
had a return value, a <tt>Vector *</tt> in this case.
</p>
<p>