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3rdparty/boost_1_81_0/boost/python/def.hpp 3.11 KB
0b6a182c   Hu Chunming   添加无鉴权注册和注销
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  // Copyright David Abrahams 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)
  #ifndef DEF_DWA200292_HPP
  # define DEF_DWA200292_HPP
  
  # include <boost/python/detail/prefix.hpp>
  
  # include <boost/python/object_fwd.hpp>
  # include <boost/python/make_function.hpp>
  # include <boost/python/detail/def_helper.hpp>
  # include <boost/python/detail/overloads_fwd.hpp>
  # include <boost/python/scope.hpp>
  # include <boost/python/signature.hpp>
  # include <boost/python/detail/scope.hpp>
  
  namespace boost { namespace python {
  
  namespace detail
  {
    namespace error
    {
      // Compile-time error messages
      template <bool> struct multiple_functions_passed_to_def;
      template <> struct multiple_functions_passed_to_def<false> { typedef char type; };
    }
    
    //
    // def_from_helper --
    //
    // Use a def_helper to define a regular wrapped function in the current scope.
    template <class F, class Helper>
    void def_from_helper(
        char const* name, F const& fn, Helper const& helper)
    {
        // Must not try to use default implementations except with method definitions.
        typedef typename error::multiple_functions_passed_to_def<
            Helper::has_default_implementation
            >::type assertion BOOST_ATTRIBUTE_UNUSED;
        
        detail::scope_setattr_doc(
            name, boost::python::make_function(
                fn
                , helper.policies()
                , helper.keywords())
            , helper.doc()
            );
    }
  
    //
    // These two overloads discriminate between def() as applied to
    // regular functions and def() as applied to the result of
    // BOOST_PYTHON_FUNCTION_OVERLOADS(). The final argument is used to
    // discriminate.
    //
    template <class Fn, class A1>
    void
    def_maybe_overloads(
        char const* name
        , Fn fn
        , A1 const& a1
        , ...)
    {
        detail::def_from_helper(name, fn, def_helper<A1>(a1));
    }
  
    template <class StubsT, class SigT>
    void def_maybe_overloads(
        char const* name
        , SigT sig
        , StubsT const& stubs
        , detail::overloads_base const*)
    {
        scope current;
        
        detail::define_with_defaults(
            name, stubs, current, detail::get_signature(sig));
    }
  
    template <class T>
    object make_function1(T fn, ...) { return make_function(fn); }
  
    inline
    object make_function1(object const& x, object const*) { return x; }
  }
  
  template <class Fn>
  void def(char const* name, Fn fn)
  {
      detail::scope_setattr_doc(name, detail::make_function1(fn, &fn), 0);
  }
  
  template <class Arg1T, class Arg2T>
  void def(char const* name, Arg1T arg1, Arg2T const& arg2)
  {
      detail::def_maybe_overloads(name, arg1, arg2, &arg2);
  }
  
  template <class F, class A1, class A2>
  void def(char const* name, F f, A1 const& a1, A2 const& a2)
  {
      detail::def_from_helper(name, f, detail::def_helper<A1,A2>(a1,a2));
  }
  
  template <class F, class A1, class A2, class A3>
  void def(char const* name, F f, A1 const& a1, A2 const& a2, A3 const& a3)
  {
      detail::def_from_helper(name, f, detail::def_helper<A1,A2,A3>(a1,a2,a3));
  }
  
  }} // namespace boost::python
  
  #endif // DEF_DWA200292_HPP