[Swig-devel] [ swig-Bugs-3519174 ] map<int,Foo*>

[SourceForge.net <no...@so...>]

Bugs item #3519174, was opened at 2012-04-18 08:38
Message generated for change (Comment added) made by ionflux
You can respond by visiting: 
https://sourceforge.net/tracker/?func=detail&atid=101645&aid=3519174&group_id=1645

Please note that this message will contain a full copy of the comment thread,
including the initial issue submission, for this request,
not just the latest update.
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: map<int,Foo*>

Initial Comment:
Compilation failed when making use of %template of std::map,
when the value of the std::map is a pointer to class instance.
%template of std::vector works, and even make the %template of std::map work.

For example:

%module demo                                                                                                                                                                                                                                   

%{
    #define SWIG_FILE_WITH_INIT

    class Foo {
        public:
            Foo(){};
    };

%}

%include "std_vector.i"
%include "std_map.i"

/* %template(vector_Foo) std::vector<Foo*>; */
%template(map_Foo) std::map<int,Foo*>;

class Foo {
    public:
        Foo();
};

Using Swig 2.0.4, this example doesn't compile, unless the line '%template(vector_Foo)' is uncommented.
Error is:

demo_wrap.cpp: In function ‘const char* swig::type_name() [with Type = Foo]’:
demo_wrap.cpp:3201:   instantiated from ‘static swig_type_info* swig::traits_info<Type>::type_info() [with Type = Foo]’
demo_wrap.cpp:3208:   instantiated from ‘swig_type_info* swig::type_info() [with Type = Foo]’
demo_wrap.cpp:3242:   instantiated from ‘static PyObject* swig::traits_from_ptr<Type>::from(Type*, int) [with Type = Foo]’
demo_wrap.cpp:3254:   instantiated from ‘static PyObject* swig::traits_from<Type*>::from(Type*) [with Type = Foo]’
demo_wrap.cpp:3267:   instantiated from ‘PyObject* swig::from(const Type&) [with Type = Foo*]’
demo_wrap.cpp:4542:   instantiated from here
demo_wrap.cpp:3191: error: ‘type_name’ is not a member of ‘swig::traits<Foo>’

It seems that the problem was solved in swig-1.3.33:
    http://old.nabble.com/std::map-and-python-td15206781.html
    http://comments.gmane.org/gmane.comp.programming.swig/9472


----------------------------------------------------------------------

Comment By: Joern P. Meier (ionflux)
Date: 2012-05-30 06:18

Message:
I can confirm this for swig-2.0.4. Couldn't test with 2.0.7 because of some
other bug.

The old workaround still works.

----------------------------------------------------------------------

You can respond by visiting: 
https://sourceforge.net/tracker/?func=detail&atid=101645&aid=3519174&group_id=1645