Imported existing code

libraries/include/boost/python/signature.hpp

@@ -0,0 +1,179 @@
+///////////////////////////////////////////////////////////////////////////////
+//
+// Copyright David Abrahams 2002, Joel de Guzman, 2002.
+// Distributed under the Boost Software License, Version 1.0. (See
+// accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt)
+//
+///////////////////////////////////////////////////////////////////////////////
+#if !defined(BOOST_PP_IS_ITERATING)
+
+# ifndef SIGNATURE_JDG20020813_HPP
+#  define SIGNATURE_JDG20020813_HPP
+
+# include <boost/python/detail/prefix.hpp>
+
+# include <boost/mpl/if.hpp>
+# include <boost/type_traits/is_convertible.hpp>
+
+#  include <boost/python/detail/preprocessor.hpp>
+#  include <boost/preprocessor/repeat.hpp>
+#  include <boost/preprocessor/enum.hpp>
+#  include <boost/preprocessor/enum_params.hpp>
+#  include <boost/preprocessor/empty.hpp>
+#  include <boost/preprocessor/arithmetic/sub.hpp>
+#  include <boost/preprocessor/iterate.hpp>
+#  include <boost/python/detail/type_list.hpp>
+
+#  include <boost/preprocessor/debug/line.hpp>
+#  include <boost/preprocessor/arithmetic/sub.hpp>
+#  include <boost/preprocessor/arithmetic/inc.hpp>
+#  include <boost/preprocessor/repetition/enum_trailing_params.hpp>
+
+# define BOOST_PYTHON_LIST_INC(n)        \
+   BOOST_PP_CAT(mpl::vector, BOOST_PP_INC(n))
+
+///////////////////////////////////////////////////////////////////////////////
+namespace boost { namespace python { namespace detail {
+
+// A metafunction returning C1 if C1 is derived from C2, and C2
+// otherwise
+template <class C1, class C2>
+struct most_derived
+{
+    typedef typename mpl::if_<
+        is_convertible<C1*,C2*>
+      , C1
+      , C2
+    >::type type;
+};
+
+//  The following macros generate expansions for::
+//
+//      template <class RT, class T0... class TN>
+//      inline mpl::vector<RT, T0...TN>
+//      get_signature(RT(*)(T0...TN), void* = 0)
+//      {
+//          return mpl::list<RT, T0...TN>();
+//      }
+//
+//   And, for an appropriate assortment of cv-qualifications::
+//
+//      template <class RT, class ClassT, class T0... class TN>
+//      inline mpl::vector<RT, ClassT&, T0...TN>
+//      get_signature(RT(ClassT::*)(T0...TN) cv))
+//      {
+//          return mpl::list<RT, ClassT&, T0...TN>();
+//      }
+//
+//      template <class Target, class RT, class ClassT, class T0... class TN>
+//      inline mpl::vector<
+//          RT
+//        , typename most_derived<Target, ClassT>::type&
+//        , T0...TN
+//      >
+//      get_signature(RT(ClassT::*)(T0...TN) cv), Target*)
+//      {
+//          return mpl::list<RT, ClassT&, T0...TN>();
+//      }
+//
+//  There are two forms for invoking get_signature::
+//
+//      get_signature(f)
+//
+//  and ::
+//
+//      get_signature(f,(Target*)0)
+//
+//  These functions extract the return type, class (for member
+//  functions) and arguments of the input signature and stuff them in
+//  an mpl type sequence.  Note that cv-qualification is dropped from
+//  the "hidden this" argument of member functions; that is a
+//  necessary sacrifice to ensure that an lvalue from_python converter
+//  is used.  A pointer is not used so that None will be rejected for
+//  overload resolution.
+//
+//  The second form of get_signature essentially downcasts the "hidden
+//  this" argument of member functions to Target, because the function
+//  may actually be a member of a base class which is not wrapped, and
+//  in that case conversion from python would fail.
+//
+// @group {
+
+#  define BOOST_PP_ITERATION_PARAMS_1                                   \
+    (3, (0, BOOST_PYTHON_MAX_ARITY, <boost/python/signature.hpp>))
+
+#  include BOOST_PP_ITERATE()
+#  undef BOOST_PYTHON_LIST_INC
+
+// }
+
+}}} // namespace boost::python::detail
+
+
+# endif // SIGNATURE_JDG20020813_HPP
+
+#elif BOOST_PP_ITERATION_DEPTH() == 1 // defined(BOOST_PP_IS_ITERATING)
+
+# define N BOOST_PP_ITERATION()
+
+template <
+    class RT BOOST_PP_ENUM_TRAILING_PARAMS_Z(1, N, class T)>
+inline BOOST_PYTHON_LIST_INC(N)<
+    RT BOOST_PP_ENUM_TRAILING_PARAMS_Z(1, N, T)>
+get_signature(RT(*)(BOOST_PP_ENUM_PARAMS_Z(1, N, T)), void* = 0)
+{
+    return BOOST_PYTHON_LIST_INC(N)<
+            RT BOOST_PP_ENUM_TRAILING_PARAMS_Z(1, N, T)
+        >();
+}
+
+# undef N
+
+# define BOOST_PP_ITERATION_PARAMS_2 \
+    (3, (0, 3, <boost/python/signature.hpp>))
+# include BOOST_PP_ITERATE()
+
+#else
+
+# define N BOOST_PP_RELATIVE_ITERATION(1)
+# define Q BOOST_PYTHON_CV_QUALIFIER(BOOST_PP_ITERATION())
+
+template <
+    class RT, class ClassT BOOST_PP_ENUM_TRAILING_PARAMS_Z(1, N, class T)>
+inline BOOST_PYTHON_LIST_INC(BOOST_PP_INC(N))<
+    RT, ClassT& BOOST_PP_ENUM_TRAILING_PARAMS_Z(1, N, T)>
+get_signature(RT(ClassT::*)(BOOST_PP_ENUM_PARAMS_Z(1, N, T)) Q)
+{
+    return BOOST_PYTHON_LIST_INC(BOOST_PP_INC(N))<
+            RT, ClassT& BOOST_PP_ENUM_TRAILING_PARAMS_Z(1, N, T)
+        >();
+}
+
+template <
+    class Target
+  , class RT
+  , class ClassT
+    BOOST_PP_ENUM_TRAILING_PARAMS_Z(1, N, class T)
+>
+inline BOOST_PYTHON_LIST_INC(BOOST_PP_INC(N))<
+    RT
+  , typename most_derived<Target, ClassT>::type&
+    BOOST_PP_ENUM_TRAILING_PARAMS_Z(1, N, T)
+>
+get_signature(
+    RT(ClassT::*)(BOOST_PP_ENUM_PARAMS_Z(1, N, T)) Q
+  , Target*
+)
+{
+    return BOOST_PYTHON_LIST_INC(BOOST_PP_INC(N))<
+        RT
+      , BOOST_DEDUCED_TYPENAME most_derived<Target, ClassT>::type&
+        BOOST_PP_ENUM_TRAILING_PARAMS_Z(1, N, T)
+    >();
+}
+
+# undef Q
+# undef N
+
+#endif // !defined(BOOST_PP_IS_ITERATING)