如果您决定使用替代1（N * K代表），您可以使用 Boost.Preprocessor 为您执行样板工作：

If you decide to go with alternative 1 (N*K delegates), you can use Boost.Preprocessor to do the boilerplate work for you:

#include <boost/preprocessor.hpp>

// Define identifier names

#define FUNCTIONS (fun)(gun)(hun)

#define MEMBER_NAMES (m1_)(m2_)(m3_)

#define SUFFIXES (_1)(_2)(_3)


// Utility "data structure"
// Used to hand down state from iteration over functions to iteration over suffixes

#define WRAP_DATA(function, member) \
  (2, (function, member))

#define UNWRAP_DATA_FUNTION(data) \
  BOOST_PP_ARRAY_ELEM(0, data)

#define UNWRAP_DATA_MEMBER(data) \
  BOOST_PP_ARRAY_ELEM(1, data)


// Accessor-generating functionality

  // Convenience macro for generating the correct accessor name
#define CREATE_FUNCTION_NAME(data, suffix) \
  BOOST_PP_CAT(UNWRAP_DATA_FUNCTION(data), suffix)

  // Macro generating one accessor delegation
#define GENERATE_ACCESSOR(r, data, suffix) \
  int CREATE_FUNCTION_NAME(data, suffix) () const { return UNWRAP_DATA_MEMBER(data).CREATE_FUNCTION_NAME(data, suffix) (); }


// Generate accessors

class C
{

  // Execute GENERATE_ACCESSOR once for each element of SUFFIXES
#define BOOST_PP_LOCAL_MACRO(iter) \
  BOOST_PP_SEQ_FOR_EACH(GENERATE_ACCESSOR, WRAP_DATA(BOOST_PP_SEQ_ELEM(iter, FUNCTIONS), BOOST_PP_SEQ_ELEM(iter, MEMBER_NAMES)), SUFFIXES)

#define BOOST_PP_LOCAL_LIMITS (0, BOOST_PP_SEQ_SIZE(FUNCTIONS) - 1)

  // Execute BOOST_PP_LOCAL_MACRO once for each value within BOOST_PP_LOCAL_LIMITS
#include BOOST_PP_LOCAL_ITERATE()

// rest of class C here
// ...

};

转换为伪代码以更好地突出工作逻辑：

Translated into pseudo-code to better highlight the working logic:

FUNCTIONS = {fun, gun, hun};
MEMBER_NAMES = {m1_, m2_, m3_};
SUFFIXES = {_1, _2, _3};

struct Data {
  auto function, member;
};

auto createFunctionName(data, suffix) {
  return data.function + suffix;
}

auto generateAccessor(data, suffix) {
  return "int " + createFunctionName(data, suffix) + "() const { return " + data.member + "." + createFunctionName(data, suffix) + "(); }";
}


class C
{

for (i = 0; i < sizeof(FUNCTIONS); ++i) {
  foreach (suffix in SUFFIXES) {
    generateAccessor(Data(FUNCTIONS[i], MEMBER_NAMES[i]), suffix);
  }
}

};