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3rdparty/boost_1_81_0/boost/python/detail/invoke.hpp 3.59 KB
0b6a182c   Hu Chunming   添加无鉴权注册和注销
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  #if !defined(BOOST_PP_IS_ITERATING)
  
  // 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 INVOKE_DWA20021122_HPP
  #  define INVOKE_DWA20021122_HPP
  
  #  include <boost/python/detail/prefix.hpp>
  #  include <boost/python/detail/preprocessor.hpp>
  #  include <boost/python/detail/none.hpp>
  
  #  include <boost/preprocessor/iterate.hpp>
  #  include <boost/preprocessor/facilities/intercept.hpp>
  #  include <boost/preprocessor/repetition/enum_trailing_params.hpp>
  #  include <boost/preprocessor/repetition/enum_trailing_binary_params.hpp>
  #  include <boost/preprocessor/repetition/enum_binary_params.hpp>
  #  include <boost/python/to_python_value.hpp>
  
  // This file declares a series of overloaded invoke(...)  functions,
  // used to invoke wrapped C++ function (object)s from Python. Each one
  // accepts:
  //
  //   - a tag which identifies the invocation syntax (e.g. member
  //   functions must be invoked with a different syntax from regular
  //   functions)
  //
  //   - a pointer to a result converter type, used solely as a way of
  //   transmitting the type of the result converter to the function (or
  //   an int, if the return type is void).
  //
  //   - the "function", which may be a function object, a function or
  //   member function pointer, or a defaulted_virtual_fn.
  //
  //   - The arg_from_python converters for each of the arguments to be
  //   passed to the function being invoked.
  
  namespace boost { namespace python { namespace detail { 
  
  // This "result converter" is really just used as a dispatch tag to
  // invoke(...), selecting the appropriate implementation
  typedef int void_result_to_python;
  
  template <bool void_return, bool member>
  struct invoke_tag_ {};
  
  // A metafunction returning the appropriate tag type for invoking an
  // object of type F with return type R.
  template <class R, class F>
  struct invoke_tag
    : invoke_tag_<
          is_same<R,void>::value
        , is_member_function_pointer<F>::value
      >
  {
  };
  
  #  define BOOST_PP_ITERATION_PARAMS_1                                            \
          (3, (0, BOOST_PYTHON_MAX_ARITY, <boost/python/detail/invoke.hpp>))
  #  include BOOST_PP_ITERATE()
  
  }}} // namespace boost::python::detail
  
  # endif // INVOKE_DWA20021122_HPP
  #else 
  
  # define N BOOST_PP_ITERATION()
  
  template <class RC, class F BOOST_PP_ENUM_TRAILING_PARAMS_Z(1, N, class AC)>
  inline PyObject* invoke(invoke_tag_<false,false>, RC const& rc, F& f BOOST_PP_ENUM_TRAILING_BINARY_PARAMS_Z(1, N, AC, & ac) )
  {
      return rc(f( BOOST_PP_ENUM_BINARY_PARAMS_Z(1, N, ac, () BOOST_PP_INTERCEPT) ));
  }
                   
  template <class RC, class F BOOST_PP_ENUM_TRAILING_PARAMS_Z(1, N, class AC)>
  inline PyObject* invoke(invoke_tag_<true,false>, RC const&, F& f BOOST_PP_ENUM_TRAILING_BINARY_PARAMS_Z(1, N, AC, & ac) )
  {
      f( BOOST_PP_ENUM_BINARY_PARAMS_Z(1, N, ac, () BOOST_PP_INTERCEPT) );
      return none();
  }
  
  template <class RC, class F, class TC BOOST_PP_ENUM_TRAILING_PARAMS_Z(1, N, class AC)>
  inline PyObject* invoke(invoke_tag_<false,true>, RC const& rc, F& f, TC& tc BOOST_PP_ENUM_TRAILING_BINARY_PARAMS_Z(1, N, AC, & ac) )
  {
      return rc( (tc().*f)(BOOST_PP_ENUM_BINARY_PARAMS_Z(1, N, ac, () BOOST_PP_INTERCEPT)) );
  }
                   
  template <class RC, class F, class TC BOOST_PP_ENUM_TRAILING_PARAMS_Z(1, N, class AC)>
  inline PyObject* invoke(invoke_tag_<true,true>, RC const&, F& f, TC& tc BOOST_PP_ENUM_TRAILING_BINARY_PARAMS_Z(1, N, AC, & ac) )
  {
      (tc().*f)(BOOST_PP_ENUM_BINARY_PARAMS_Z(1, N, ac, () BOOST_PP_INTERCEPT));
      return none();
  }
  
  # undef N
  
  #endif // BOOST_PP_IS_ITERATING