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support for asymmetric type marshalling - added out attribute for ctype, imtype and cstype typemaps

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git-svn-id: https://swig.svn.sourceforge.net/svnroot/swig/trunk/SWIG@7172 626c5289-ae23-0410-ae9c-e8d60b6d4f22
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William S Fulton 2005-04-28 21:59:17 +00:00
commit 9be34b6b9a
2 changed files with 50 additions and 6 deletions
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38
Doc/Manual/CSharp.html
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@ -162,6 +162,40 @@ $jnicall -> $imcall
</pre></div>
</li>
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<p>
The intermediary classname has <tt>PINVOKE</tt> appended after the module name instead of <tt>JNI</tt>, for example <tt>modulenamePINVOKE</tt>.
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<p>
Support for asymmetric type marshalling. The 'ctype', 'imtype' and 'cstype' typemaps support an optional <tt>out</tt> attribute which is used for output types.
If this typemap attribute is specified, then the type specified in the attribute is used for output types.
the type specified in the typemap itself is used for the input type.
If this typemap attribute is not specified, then the type used for both input and output is the type specified in the typemap.
An example shows that <tt>char *</tt> could be marshalled in different ways,
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<div class="code">
<pre>
%typemap(imtype, out="IntPtr") char * "string"
char * function(char *);
</pre>
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<p>
The output type is thus IntPtr and the input type is string. The resulting intermediary C# code is:
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<div class="code">
<pre>
public static extern IntPtr function(string jarg1);
</pre>
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@ -171,10 +205,6 @@ The special variable will get translated into the value specified by the <tt>-dl
if specified, otherwise it is equivalent to the <b>$module</b> special variable.
</p>
<p>
The intermediary classname has <tt>PINVOKE</tt> appended after the module name instead of <tt>JNI</tt>, for example <tt>modulenamePINVOKE</tt>.
</p>
<p>
The directory <tt>Examples/csharp</tt> has a number of simple examples.
Visual Studio .NET 2003 solution and project files are available for compiling with the Microsoft .NET C# compiler on Windows.