[Swig-devel] [ swig-Bugs-3497393 ] namespace/using breaks shared_ptr typemap

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Bugs item #3497393, was opened at 2012-03-06 00:21
Message generated for change (Comment added) made by dfroger
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Category: python
Group: None
Status: Open
Resolution: None
Priority: 5
Private: No
Submitted By: https://www.google.com/accounts ()
Assigned to: Nobody/Anonymous (nobody)
Summary: namespace/using breaks shared_ptr typemap

Initial Comment:
if the 'using std::tr1::shared_ptr;' statement is itself nested in a local namespace, then the shared_ptr typemap breaks down.  A small isolated version of the problem has been included in a tarball.  Please see the code there for more details.

This appears to be a rather odd corner case.  However, I managed to spend days confounded by it none the less.  I didn't find a solution for my project until after reading the boost_shared_ptr.i file.

The offending output when g++ is run on the generated wrapper code is as follows:
example_wrap.cxx: In function ‘PyObject* _wrap_MyObject_create(PyObject*, PyObject*)’:
example_wrap.cxx:3061: error: ‘shared_ptr’ was not declared in this scope
example_wrap.cxx:3061: error: template argument 1 is invalid
example_wrap.cxx:3061: error: expected unqualified-id before ‘>’ token
example_wrap.cxx:3064: error: ‘result’ was not declared in this scope
example_wrap.cxx:3065: error: expected type-specifier before ‘shared_ptr’
example_wrap.cxx:3065: error: expected `)' before ‘shared_ptr’
example_wrap.cxx:3065: error: expected `)' before ‘;’ token

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Comment By: David Froger (dfroger)
Date: 2012-03-23 16:30

Message:
Hi,

Adding "using namespace myName;"  beetween %{ %} make the example in
tarball works, that is:

%{
#include "example.h"
using namespace myName;
%}

Best,
David


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