[C++-sig] [Py++] compilation errors

[Michał Nowotka]

Hello,
when generating binding code using Py++ i got following warnings:

   WARNING: hapl::Fenotype const *
hapl::Fenotypes::find_equal(hapl::Fenotype const & pattern) const
[member function]
   > compilation error W1050: The function returns "hapl::Fenotype
const *" type. You have to specify a call policies.Be sure to take a
look on Py++ defined
   > call policies:
http://language-binding.net/pyplusplus/documentation/functions/call_policies.html#py-defined-call-policies

   WARNING: hapl::Fenotype *
hapl::Fenotypes::find_equal(hapl::Fenotype const & pattern) [member
function]
   > compilation error W1050: The function returns "hapl::Fenotype *"
type. You have to specify a call policies.Be sure to take a look on
Py++ defined call
   > policies: http://language-binding.net/pyplusplus/documentation/functions/call_policies.html#py-defined-call-policies

   WARNING: hapl::Haplotype const *
hapl::Haplotypes::find_equal(hapl::Haplotype const & pattern) const
[member function]
   > compilation error W1050: The function returns "hapl::Haplotype
const *" type. You have to specify a call policies.Be sure to take a
look on Py++ defined
   > call policies:
http://language-binding.net/pyplusplus/documentation/functions/call_policies.html#py-defined-call-policies

   WARNING: hapl::Haplotype const * hapl::Genotype::getUp() const
[member function]
   > compilation error W1050: The function returns "hapl::Haplotype
const *" type. You have to specify a call policies.Be sure to take a
look on Py++ defined
   > call policies:
http://language-binding.net/pyplusplus/documentation/functions/call_policies.html#py-defined-call-policies

   WARNING: hapl::Haplotype const * hapl::Genotype::getDown() const
[member function]
   > compilation error W1050: The function returns "hapl::Haplotype
const *" type. You have to specify a call policies.Be sure to take a
look on Py++ defined
   > call policies:
http://language-binding.net/pyplusplus/documentation/functions/call_policies.html#py-defined-call-policies

   WARNING: hapl::Fenotype const * hapl::Genotype::getFenotype() const
[member function]
   > compilation error W1050: The function returns "hapl::Fenotype
const *" type. You have to specify a call policies.Be sure to take a
look on Py++ defined
   > call policies:
http://language-binding.net/pyplusplus/documentation/functions/call_policies.html#py-defined-call-policies


so I found all function declarations returning 'hapl::Fenotype const
*' and  ' hapl::Haplotype const *' in my header files and assigned
call policies:

mb.member_function( 'getLocus' ).call_policies =
module_builder.call_policies.return_internal_reference()
mb.member_functions( 'findVariant' ).call_policies =
module_builder.call_policies.return_internal_reference()
mb.member_functions( 'find_equal' ).call_policies =
module_builder.call_policies.return_internal_reference()
mb.member_function( 'getUp' ).call_policies =
module_builder.call_policies.return_internal_reference()
mb.member_function( 'getDown' ).call_policies =
module_builder.call_policies.return_internal_reference()
mb.member_function( 'getFenotype' ).call_policies =
module_builder.call_policies.return_internal_reference()

now all warnings disappeared. But when compiling output file i got some errors:

/usr/include/boost/python/detail/invoke.hpp: In function 'PyObject*
boost::python::detail::invoke(boost::python::detail::invoke_tag_<false,
false>, const RC&, F&, AC0&) [with RC =
boost::python::detail::caller_arity<1u>::impl<F, Policies,
Sig>::operator()(PyObject*, PyObject*) [with F = const hapl::Fenotype*
(*)(std::pair<const hapl::Fenotype* const, double>&), Policies =
boost::python::default_call_policies, Sig = boost::mpl::vector2<const
hapl::Fenotype*, std::pair<const hapl::Fenotype* const,
double>&>]::result_converter, F = const hapl::Fenotype*
(*)(std::pair<const hapl::Fenotype* const, double>&), AC0 =
boost::python::detail::caller_arity<1u>::impl<F, Policies,
Sig>::operator()(PyObject*, PyObject*) [with F = const hapl::Fenotype*
(*)(std::pair<const hapl::Fenotype* const, double>&), Policies =
boost::python::default_call_policies, Sig = boost::mpl::vector2<const
hapl::Fenotype*, std::pair<const hapl::Fenotype* const,
double>&>]::c_t0]':
/usr/include/boost/python/detail/caller.hpp:199:   instantiated from
'PyObject* boost::python::detail::caller_arity<1u>::impl<F, Policies,
Sig>::operator()(PyObject*, PyObject*) [with F = const hapl::Fenotype*
(*)(std::pair<const hapl::Fenotype* const, double>&), Policies =
boost::python::default_call_policies, Sig = boost::mpl::vector2<const
hapl::Fenotype*, std::pair<const hapl::Fenotype* const, double>&>]'
/usr/include/boost/python/object/py_function.hpp:38:   instantiated
from 'PyObject*
boost::python::objects::caller_py_function_impl<Caller>::operator()(PyObject*,
PyObject*) [with Caller = boost::python::detail::caller<const
hapl::Fenotype* (*)(std::pair<const hapl::Fenotype* const, double>&),
boost::python::default_call_policies, boost::mpl::vector2<const
hapl::Fenotype*, std::pair<const hapl::Fenotype* const, double>&> >]'
bindings.cpp:780:   instantiated from here
/usr/include/boost/python/detail/invoke.hpp:75: error: no match for
call to '(const
boost::python::detail::specify_a_return_value_policy_to_wrap_functions_returning<const
hapl::Fenotype*>) (const hapl::Fenotype*)'

/usr/include/boost/python/detail/invoke.hpp: In function 'PyObject*
boost::python::detail::invoke(boost::python::detail::invoke_tag_<false,
false>, const RC&, F&, AC0&) [with RC =
boost::python::detail::caller_arity<1u>::impl<F, Policies,
Sig>::operator()(PyObject*, PyObject*) [with F = const hapl::Genotype*
(*)(std::pair<const hapl::Genotype* const, double>&), Policies =
boost::python::default_call_policies, Sig = boost::mpl::vector2<const
hapl::Genotype*, std::pair<const hapl::Genotype* const,
double>&>]::result_converter, F = const hapl::Genotype*
(*)(std::pair<const hapl::Genotype* const, double>&), AC0 =
boost::python::detail::caller_arity<1u>::impl<F, Policies,
Sig>::operator()(PyObject*, PyObject*) [with F = const hapl::Genotype*
(*)(std::pair<const hapl::Genotype* const, double>&), Policies =
boost::python::default_call_policies, Sig = boost::mpl::vector2<const
hapl::Genotype*, std::pair<const hapl::Genotype* const,
double>&>]::c_t0]':
/usr/include/boost/python/detail/caller.hpp:199:   instantiated from
'PyObject* boost::python::detail::caller_arity<1u>::impl<F, Policies,
Sig>::operator()(PyObject*, PyObject*) [with F = const hapl::Genotype*
(*)(std::pair<const hapl::Genotype* const, double>&), Policies =
boost::python::default_call_policies, Sig = boost::mpl::vector2<const
hapl::Genotype*, std::pair<const hapl::Genotype* const, double>&>]'
/usr/include/boost/python/object/py_function.hpp:38:   instantiated
from 'PyObject*
boost::python::objects::caller_py_function_impl<Caller>::operator()(PyObject*,
PyObject*) [with Caller = boost::python::detail::caller<const
hapl::Genotype* (*)(std::pair<const hapl::Genotype* const, double>&),
boost::python::default_call_policies, boost::mpl::vector2<const
hapl::Genotype*, std::pair<const hapl::Genotype* const, double>&> >]'
bindings.cpp:780:   instantiated from here
/usr/include/boost/python/detail/invoke.hpp:75: error: no match for
call to '(const
boost::python::detail::specify_a_return_value_policy_to_wrap_functions_returning<const
hapl::Genotype*>) (const hapl::Genotype*)'

/usr/include/boost/python/detail/invoke.hpp: In function 'PyObject*
boost::python::detail::invoke(boost::python::detail::invoke_tag_<false,
false>, const RC&, F&, AC0&) [with RC =
boost::python::detail::caller_arity<1u>::impl<F, Policies,
Sig>::operator()(PyObject*, PyObject*) [with F = const
hapl::Haplotype* (*)(std::pair<const hapl::Haplotype* const,
double>&), Policies = boost::python::default_call_policies, Sig =
boost::mpl::vector2<const hapl::Haplotype*, std::pair<const
hapl::Haplotype* const, double>&>]::result_converter, F = const
hapl::Haplotype* (*)(std::pair<const hapl::Haplotype* const,
double>&), AC0 = boost::python::detail::caller_arity<1u>::impl<F,
Policies, Sig>::operator()(PyObject*, PyObject*) [with F = const
hapl::Haplotype* (*)(std::pair<const hapl::Haplotype* const,
double>&), Policies = boost::python::default_call_policies, Sig =
boost::mpl::vector2<const hapl::Haplotype*, std::pair<const
hapl::Haplotype* const, double>&>]::c_t0]':
/usr/include/boost/python/detail/caller.hpp:199:   instantiated from
'PyObject* boost::python::detail::caller_arity<1u>::impl<F, Policies,
Sig>::operator()(PyObject*, PyObject*) [with F = const
hapl::Haplotype* (*)(std::pair<const hapl::Haplotype* const,
double>&), Policies = boost::python::default_call_policies, Sig =
boost::mpl::vector2<const hapl::Haplotype*, std::pair<const
hapl::Haplotype* const, double>&>]'
/usr/include/boost/python/object/py_function.hpp:38:   instantiated
from 'PyObject*
boost::python::objects::caller_py_function_impl<Caller>::operator()(PyObject*,
PyObject*) [with Caller = boost::python::detail::caller<const
hapl::Haplotype* (*)(std::pair<const hapl::Haplotype* const,
double>&), boost::python::default_call_policies,
boost::mpl::vector2<const hapl::Haplotype*, std::pair<const
hapl::Haplotype* const, double>&> >]'
bindings.cpp:780:   instantiated from here
/usr/include/boost/python/detail/invoke.hpp:75: error: no match for
call to '(const
boost::python::detail::specify_a_return_value_policy_to_wrap_functions_returning<const
hapl::Haplotype*>) (const hapl::Haplotype*)'

this is strange for me bacause I'm sure I listed all methods returning
mentioned types. There is also one more type that doesn't cause
warning: '(const hapl::Genotype*'
So I guess this problem may be caused by typedef declaration in my header files:

typedef std::map<const Haplotype*,double> ProbHaplotype;

typedef std::map<const Fenotype*,double> ProbFenotype;

typedef std::map<const Genotype*,double> ProbGenotype;

and:

typedef std::set<const Fenotype*> ObsFenotypes;

typedef std::set<const Genotype*> ObsGenotypes;

typedef std::set<const Haplotype*> ObsHaplotypes;

STL generic containers can generate methods returning problematic
types so i cannot see it in my headers.
To solve this problem I replaced lines with call polices mentioned above by:

mb.member_functions(return_type='hapl::Fenotype const
*').call_policies =
module_builder.call_policies.return_internal_reference()
mb.member_functions(return_type='hapl::Haplotype const
*').call_policies =
module_builder.call_policies.return_internal_reference()
mb.member_functions(return_type='hapl::Genotype const
*').call_policies =
module_builder.call_policies.return_internal_reference()

but this causes run time error:

Traceback (most recent call last):
  File "makewindow.py", line 27, in <module>
    mb.member_functions(return_type='hapl::Fenotype const
*').call_policies =
module_builder.call_policies.return_internal_reference()
  File "/usr/lib/python2.5/site-packages/pyplusplus/module_builder/builder.py",
line 564, in member_functions
    , recursive=recursive)
  File "/usr/lib/python2.5/site-packages/pygccxml/declarations/scopedef.py",
line 518, in member_functions
    , allow_empty=allow_empty)
  File "/usr/lib/python2.5/site-packages/pygccxml/declarations/scopedef.py",
line 374, in _find_multiple
    raise RuntimeError( "Multi declaration query returned 0 declarations." )
RuntimeError: Multi declaration query returned 0 declarations.

So what shuld I do to get clean complation without errors?
-- 
Regards

Michał Nowotka