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POauto_ptr with swig
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  1. POauto_ptr with swig
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    copied!<p>I'm trying to wrap a C++ library which uses auto_ptr. I'm using swig and want to generate python bindings. I'v seen the section of the swig docu on how to use swig with smart pointers <a href="http://www.swig.org/Doc2.0/SWIGDocumentation.html#SWIGPlus_smart_pointers" rel="nofollow noreferrer">here</a>. But I can't get it to work. </p> <p>Swig generates code that wants to initialize the auto_ptr using a const reference, but auto_ptr defines the copy constructor with a non-const reference e.g. auto_ptr(auto_ptr &amp;). The generated code does not compile with "discards const qualifiers". When I manually delete the const qualifier the code compiles fine.</p> <p>I'v seen lots of mailing list entries but nothing helped. Can someone provide me with a working example. My non working sample is here: </p> <pre><code>%module auto_ptr_test %{ #include &lt;memory&gt; #include &lt;iostream&gt; using namespace std; %} namespace std { template &lt;class T&gt; class auto_ptr { auto_ptr(); auto_ptr(auto_ptr &amp;); T *operator-&gt;() const; }; } %inline %{ class Test { Test() { cout &lt;&lt; "Test()" &lt;&lt; endl; } public: static std::auto_ptr&lt;Test&gt; create() const { return auto_ptr&lt;Test&gt;(new Test()); } void greet() { cout &lt;&lt; "hello" &lt;&lt; endl; } }; %} %template () std::auto_ptr&lt;Test&gt;; </code></pre> <p>I compiled it using cmake with the following CMakeLists.txt:</p> <pre><code>cmake_minimum_required(VERSION 2.8) find_package(SWIG REQUIRED) include(${SWIG_USE_FILE}) FIND_PACKAGE(PythonLibs) INCLUDE_DIRECTORIES(${PYTHON_INCLUDE_PATH}) INCLUDE_DIRECTORIES(${CMAKE_CURRENT_SOURCE_DIR}) SET(CMAKE_SWIG_FLAGS "") SET_SOURCE_FILES_PROPERTIES(auto_ptr_test.i PROPERTIES CPLUSPLUS ON) SWIG_ADD_MODULE(auto_ptr_test python auto_ptr_test.i) SWIG_LINK_LIBRARIES(auto_ptr_test ${PYTHON_LIBRARIES}) </code></pre>
 

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