[C++-sig] problem exposing iterators

[Abhishek Srivastava]

Hi,

I am facing some problem in exposing iterator, for this I have created a sample problem(to communicate this problem)

#include<iostream>
#include<vector>
using namespace std;
class A
{
};

typedef vector< A > vectorA;

class B
{
public:
typedef vectorA::iterator iter;
iter begin()
{
        return this->aVect.begin();
}
private:
vectorA aVect;
};
B getB()
{
        return B();
}
main()
{
        B b(getB());
        vectorA::iterator it = b.begin();
}

Here in the above example begin() function  in class returns vector<A>::iterator and I want to expose this function but 
while generating bindings it gives

WARNING: __gnu_cxx::__normal_iterator<A*, std::vector<A, std::allocator<A> > > [class]
> execution error W1040: The declaration is unexposed, but there are other declarations, which refer to it. This could cause "no to_python
> converter found" run time error. Declarations:   __gnu_cxx::__normal_iterator<A*, std::vector<A, std::allocator<A> > > B::begin() [member
> function]

Due to this it gives run time error while using this function.

I tried various methods to include it explicitly but it fails. Can you please help, whether I have missed something in my 
case.

Code generator that I used for generating bindings.

import sys
import os
from pyplusplus import module_builder
from pyplusplus.module_builder import call_policies
from pyplusplus import code_creators
from pyplusplus.module_builder.ctypes_decls_dependencies import find_out_dependencies

sourceFile = './testIterator.cpp'
mb=module_builder.module_builder_t(
files = [sourceFile],
include_paths = './',
indexing_suite_version = 2,
#define_symbols = defines
)

i=0
depList=[]
#depList.append(a)


def getDepend():
        global i
        if i < len(depList):
                try:
                        deps = find_out_dependencies ( [depList[i]] )
                        for dep in deps:
                                if dep not in depList:
                                        depList.append(dep)
                except:
                        print "No Dependency for class %s", x
                        pass
                i = i + 1
                getDepend()
        else:
                return 0
z = getDepend()
for dep in depList:
        dep.include()
        print dep

a = mb.free_function('getB')
depList=[a]
i = 0
z = getDepend()
for dep in depList:
        dep.include()

mb.build_code_creator( module_name = 'testIterator')

mb.code_creator.license = '//Boost Software License(http://boost.org/more/license_info.html )'

mb.write_module('bindings.cpp')
                                  
                                                                                                                          
With Regards,
Abhishek Srivastava







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