luabind/detail/call_function.hpp

   1 // Copyright (c) 2003 Daniel Wallin and Arvid Norberg
   2
   3 // Permission is hereby granted, free of charge, to any person obtaining a
   4 // copy of this software and associated documentation files (the "Software"),
   5 // to deal in the Software without restriction, including without limitation
   6 // the rights to use, copy, modify, merge, publish, distribute, sublicense,
   7 // and/or sell copies of the Software, and to permit persons to whom the
   8 // Software is furnished to do so, subject to the following conditions:
   9
  10 // The above copyright notice and this permission notice shall be included
  11 // in all copies or substantial portions of the Software.
  12
  13 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF
  14 // ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED
  15 // TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
  16 // PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT
  17 // SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR
  18 // ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  19 // ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  20 // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE
  21 // OR OTHER DEALINGS IN THE SOFTWARE.
  22
  23
  24 #if !BOOST_PP_IS_ITERATING
  25
  26 #ifndef LUABIND_CALL_FUNCTION_HPP_INCLUDED
  27 #define LUABIND_CALL_FUNCTION_HPP_INCLUDED
  28
  29 #include <luabind/config.hpp>
  30
  31 #include <boost/mpl/if.hpp>
  32 #include <boost/tuple/tuple.hpp>
  33 #include <boost/mpl/or.hpp>
  34 #ifndef LUABIND_CPP0x
  35 # include <boost/preprocessor/repeat.hpp>
  36 # include <boost/preprocessor/iteration/iterate.hpp>
  37 # include <boost/preprocessor/repetition/enum.hpp>
  38 # include <boost/preprocessor/repetition/enum_params.hpp>
  39 # include <boost/preprocessor/repetition/enum_binary_params.hpp>
  40 # include <boost/preprocessor/punctuation/comma_if.hpp>
  41 #endif
  42
  43 #include <luabind/error.hpp>
  44 #include <luabind/detail/convert_to_lua.hpp>
  45 #include <luabind/detail/pcall.hpp>
  46
  47 namespace luabind
  48 {
  49         namespace detail
  50         {
  51
  52                 // if the proxy_function_caller returns non-void
  53                         template<class Ret, class Tuple>
  54                         class proxy_function_caller
  55                         {
  56 //                      friend class luabind::object;
  57                         public:
  58
  59                                 typedef int(*function_t)(lua_State*, int, int);
  60
  61                                 proxy_function_caller(
  62                                         lua_State* L
  63                                         , int params
  64                                         , function_t fun
  65                                         , const Tuple args)
  66                                         : m_state(L)
  67                                         , m_params(params)
  68                                         , m_fun(fun)
  69                                         , m_args(args)
  70                                         , m_called(false)
  71                                 {
  72                                 }
  73
  74                                 proxy_function_caller(const proxy_function_caller& rhs)
  75                                         : m_state(rhs.m_state)
  76                                         , m_params(rhs.m_params)
  77                                         , m_fun(rhs.m_fun)
  78                                         , m_args(rhs.m_args)
  79                                         , m_called(rhs.m_called)
  80                                 {
  81                                         rhs.m_called = true;
  82                                 }
  83
  84                                 ~proxy_function_caller()
  85                                 {
  86                                         if (m_called) return;
  87
  88                                         m_called = true;
  89                                         lua_State* L = m_state;
  90
  91                                         int top = lua_gettop(L);
  92
  93                                         push_args_from_tuple<1>::apply(L, m_args);
  94 # ifdef LUABIND_CPP0x
  95                     if (m_fun(L, std::tuple_size<Tuple>::value, 0))
  96 # else
  97                                         if (m_fun(L, boost::tuples::length<Tuple>::value, 0))
  98 # endif
  99                                         {
 100                                                 assert(lua_gettop(L) == top - m_params + 1);
 101 #ifndef LUABIND_NO_EXCEPTIONS
 102                                                 throw luabind::error(L);
 103 #else
 104                                                 error_callback_fun e = get_error_callback();
 105                                                 if (e) e(L);
 106
 107                                                 assert(0 && "the lua function threw an error and exceptions are disabled."
 108                                                                         " If you want to handle the error you can use luabind::set_error_callback()");
 109                                                 std::terminate();
 110
 111 #endif
 112                                         }
 113
 114                                         // pops the return values from the function call
 115                                         stack_pop pop(L, lua_gettop(L) - top + m_params);
 116                                 }
 117
 118                                 operator Ret()
 119                                 {
 120                                         typename mpl::apply_wrap2<default_policy,Ret,lua_to_cpp>::type converter;
 121
 122                                         m_called = true;
 123                                         lua_State* L = m_state;
 124
 125                                         int top = lua_gettop(L);
 126
 127                                         push_args_from_tuple<1>::apply(L, m_args);
 128 # ifdef LUABIND_CPP0x
 129                     if (m_fun(L, std::tuple_size<Tuple>::value, 1))
 130 # else
 131                                         if (m_fun(L, boost::tuples::length<Tuple>::value, 1))
 132 # endif
 133                                         {
 134                                                 assert(lua_gettop(L) == top - m_params + 1);
 135 #ifndef LUABIND_NO_EXCEPTIONS
 136                                                 throw luabind::error(L);
 137 #else
 138                                                 error_callback_fun e = get_error_callback();
 139                                                 if (e) e(L);
 140
 141                                                 assert(0 && "the lua function threw an error and exceptions are disabled."
 142                                                                 " If you want to handle the error you can use luabind::set_error_callback()");
 143                                                 std::terminate();
 144 #endif
 145                                         }
 146
 147                                         // pops the return values from the function call
 148                                         stack_pop pop(L, lua_gettop(L) - top + m_params);
 149
 150                                         if (converter.match(L, LUABIND_DECORATE_TYPE(Ret), -1) < 0)
 151                                         {
 152 #ifndef LUABIND_NO_EXCEPTIONS
 153                                                 throw cast_failed(L, typeid(Ret));
 154 #else
 155                                                 cast_failed_callback_fun e = get_cast_failed_callback();
 156                                                 if (e) e(L, typeid(Ret));
 157
 158                                                 assert(0 && "the lua function's return value could not be converted."
 159                                                                         " If you want to handle the error you can use luabind::set_error_callback()");
 160                                                 std::terminate();
 161 #endif
 162                                         }
 163                                         return converter.apply(L, LUABIND_DECORATE_TYPE(Ret), -1);
 164                                 }
 165
 166                                 template<class Policies>
 167                                 Ret operator[](const Policies& p)
 168                                 {
 169                                         typedef typename detail::find_conversion_policy<0, Policies>::type converter_policy;
 170                                         typename mpl::apply_wrap2<converter_policy,Ret,lua_to_cpp>::type converter;
 171
 172                                         m_called = true;
 173                                         lua_State* L = m_state;
 174
 175                                         int top = lua_gettop(L);
 176
 177                                         detail::push_args_from_tuple<1>::apply(L, m_args, p);
 178 # ifdef LUABIND_CPP0x
 179                     if (m_fun(L, std::tuple_size<Tuple>::value, 1))
 180 # else
 181                                         if (m_fun(L, boost::tuples::length<Tuple>::value, 1))
 182 # endif
 183                                         {
 184                                                 assert(lua_gettop(L) == top - m_params + 1);
 185 #ifndef LUABIND_NO_EXCEPTIONS
 186                                                 throw error(L);
 187 #else
 188                                                 error_callback_fun e = get_error_callback();
 189                                                 if (e) e(L);
 190
 191                                                 assert(0 && "the lua function threw an error and exceptions are disabled."
 192                                                                 " If you want to handle the error you can use luabind::set_error_callback()");
 193                                                 std::terminate();
 194 #endif
 195                                         }
 196
 197                                         // pops the return values from the function call
 198                                         stack_pop pop(L, lua_gettop(L) - top + m_params);
 199
 200                                         if (converter.match(L, LUABIND_DECORATE_TYPE(Ret), -1) < 0)
 201                                         {
 202 #ifndef LUABIND_NO_EXCEPTIONS
 203                                                 throw cast_failed(L, typeid(Ret));
 204 #else
 205                                                 cast_failed_callback_fun e = get_cast_failed_callback();
 206                                                 if (e) e(L, typeid(Ret));
 207
 208                                                 assert(0 && "the lua function's return value could not be converted."
 209                                                                         " If you want to handle the error you can use luabind::set_error_callback()");
 210                                                 std::terminate();
 211
 212 #endif
 213                                         }
 214
 215                                         return converter.apply(L, LUABIND_DECORATE_TYPE(Ret), -1);
 216                                 }
 217
 218                         private:
 219
 220                                 lua_State* m_state;
 221                                 int m_params;
 222                                 function_t m_fun;
 223                                 Tuple m_args;
 224                                 mutable bool m_called;
 225
 226                         };
 227
 228                 // if the proxy_member_caller returns void
 229                         template<class Tuple>
 230                         class proxy_function_void_caller
 231                         {
 232                         public:
 233
 234                                 typedef int(*function_t)(lua_State*, int, int);
 235
 236                                 proxy_function_void_caller(
 237                                         lua_State* L
 238                                         , int params
 239                                         , function_t fun
 240                                         , const Tuple args)
 241                                         : m_state(L)
 242                                         , m_params(params)
 243                                         , m_fun(fun)
 244                                         , m_args(args)
 245                                         , m_called(false)
 246                                 {
 247                                 }
 248
 249                                 proxy_function_void_caller(const proxy_function_void_caller& rhs)
 250                                         : m_state(rhs.m_state)
 251                                         , m_params(rhs.m_params)
 252                                         , m_fun(rhs.m_fun)
 253                                         , m_args(rhs.m_args)
 254                                         , m_called(rhs.m_called)
 255                                 {
 256                                         rhs.m_called = true;
 257                                 }
 258
 259                                 ~proxy_function_void_caller()
 260                                 {
 261                                         if (m_called) return;
 262
 263                                         m_called = true;
 264                                         lua_State* L = m_state;
 265
 266                                         int top = lua_gettop(L);
 267
 268                                         push_args_from_tuple<1>::apply(L, m_args);
 269 # ifdef LUABIND_CPP0x
 270                     if (m_fun(L, std::tuple_size<Tuple>::value, 0))
 271 # else
 272                                         if (m_fun(L, boost::tuples::length<Tuple>::value, 0))
 273 # endif
 274                                         {
 275                                                 assert(lua_gettop(L) == top - m_params + 1);
 276 #ifndef LUABIND_NO_EXCEPTIONS
 277                                                 throw luabind::error(L);
 278 #else
 279                                                 error_callback_fun e = get_error_callback();
 280                                                 if (e) e(L);
 281
 282                                                 assert(0 && "the lua function threw an error and exceptions are disabled."
 283                                                                 " If you want to handle the error you can use luabind::set_error_callback()");
 284                                                 std::terminate();
 285 #endif
 286                                         }
 287                                         // pops the return values from the function call
 288                                         stack_pop pop(L, lua_gettop(L) - top + m_params);
 289                                 }
 290
 291                                 template<class Policies>
 292                                 void operator[](const Policies& p)
 293                                 {
 294                                         m_called = true;
 295                                         lua_State* L = m_state;
 296
 297                                         int top = lua_gettop(L);
 298
 299                                         detail::push_args_from_tuple<1>::apply(L, m_args, p);
 300 # ifdef LUABIND_CPP0x
 301                     if (m_fun(L, std::tuple_size<Tuple>::value, 0))
 302 # else
 303                                         if (m_fun(L, boost::tuples::length<Tuple>::value, 0))
 304 # endif
 305                                         {
 306                                                 assert(lua_gettop(L) == top - m_params + 1);
 307 #ifndef LUABIND_NO_EXCEPTIONS
 308                                                 throw error(L);
 309 #else
 310                                                 error_callback_fun e = get_error_callback();
 311                                                 if (e) e(L);
 312
 313                                                 assert(0 && "the lua function threw an error and exceptions are disabled."
 314                                                         " If you want to handle the error you can use luabind::set_error_callback()");
 315                                                 std::terminate();
 316 #endif
 317                                         }
 318                                         // pops the return values from the function call
 319                                         stack_pop pop(L, lua_gettop(L) - top + m_params);
 320                                 }
 321
 322                         private:
 323
 324                                 lua_State* m_state;
 325                                 int m_params;
 326                                 function_t m_fun;
 327                                 Tuple m_args;
 328                                 mutable bool m_called;
 329
 330                         };
 331
 332         }
 333
 334 # ifdef LUABIND_CPP0x
 335
 336
 337 namespace detail
 338 {
 339
 340   template <class R, class... Args>
 341   struct make_proxy
 342   {
 343       typedef proxy_function_caller<R, std::tuple<Args const*...> > type;
 344   };
 345
 346   template <class... Args>
 347   struct make_proxy<void, Args...>
 348   {
 349       typedef proxy_function_void_caller<std::tuple<Args const*...> > type;
 350   };
 351
 352 } // namespace detail
 353
 354 template <class R, class... Args>
 355 typename detail::make_proxy<R, Args...>::type call_function(
 356     lua_State* L, char const* name, Args const&... args)
 357 {
 358     assert(name && "luabind::call_function() expects a function name");
 359
 360     lua_pushstring(L, name);
 361     lua_gettable(L, LUA_GLOBALSINDEX);
 362
 363     typedef typename detail::make_proxy<R, Args...>::type proxy_type;
 364     return proxy_type(L, 1, &detail::pcall, std::tuple<Args const*...>(&args...));
 365 }
 366
 367 template <class R, class... Args>
 368 typename detail::make_proxy<R, Args...>::type call_function(
 369     object const& obj, Args const&... args)
 370 {
 371     obj.push(obj.interpreter());
 372
 373     typedef typename detail::make_proxy<R, Args...>::type proxy_type;
 374     return proxy_type(
 375         obj.interpreter(), 1, &detail::pcall, std::tuple<Args const*...>(&args...));
 376 }
 377
 378 template <class R, class... Args>
 379 typename detail::make_proxy<R, Args...>::type resume_function(
 380     lua_State* L, char const* name, Args const&... args)
 381 {
 382     assert(name && "luabind::call_function() expects a function name");
 383
 384     lua_pushstring(L, name);
 385     lua_gettable(L, LUA_GLOBALSINDEX);
 386
 387     typedef typename detail::make_proxy<R, Args...>::type proxy_type;
 388     return proxy_type(L, 1, &detail::resume_impl, std::tuple<Args const*...>(&args...));
 389 }
 390
 391 template <class R, class... Args>
 392 typename detail::make_proxy<R, Args...>::type resume_function(
 393     object const& obj, Args const&... args)
 394 {
 395     obj.push(obj.interpreter());
 396
 397     typedef typename detail::make_proxy<R, Args...>::type proxy_type;
 398     return proxy_type(
 399         obj.interpreter(), 1, &detail::resume_impl, std::tuple<Args const*...>(&args...));
 400 }
 401
 402 template <class R, class... Args>
 403 typename detail::make_proxy<R, Args...>::type resume(
 404     lua_State* L, Args const&... args)
 405 {
 406     typedef typename detail::make_proxy<R, Args...>::type proxy_type;
 407     return proxy_type(
 408         L, 0, &detail::resume_impl, std::tuple<Args const*...>(&args...));
 409 }
 410
 411 # else // LUABIND_CPP0x
 412
 413         #define BOOST_PP_ITERATION_PARAMS_1 (4, (0, LUABIND_MAX_ARITY, <luabind/detail/call_function.hpp>, 1))
 414         #include BOOST_PP_ITERATE()
 415
 416 # endif // LUABIND_CPP0x
 417
 418 }
 419
 420 #endif // LUABIND_CALL_FUNCTION_HPP_INCLUDED
 421
 422 #elif BOOST_PP_ITERATION_FLAGS() == 1
 423
 424 #define LUABIND_TUPLE_PARAMS(z, n, data) const A##n *
 425 #define LUABIND_OPERATOR_PARAMS(z, n, data) const A##n & a##n
 426
 427
 428         template<class Ret BOOST_PP_COMMA_IF(BOOST_PP_ITERATION()) BOOST_PP_ENUM_PARAMS(BOOST_PP_ITERATION(), class A)>
 429         typename boost::mpl::if_<boost::is_void<Ret>
 430                         , luabind::detail::proxy_function_void_caller<boost::tuples::tuple<BOOST_PP_ENUM(BOOST_PP_ITERATION(), LUABIND_TUPLE_PARAMS, _)> >
 431                         , luabind::detail::proxy_function_caller<Ret, boost::tuples::tuple<BOOST_PP_ENUM(BOOST_PP_ITERATION(), LUABIND_TUPLE_PARAMS, _)> > >::type
 432         call_function(lua_State* L, const char* name BOOST_PP_COMMA_IF(BOOST_PP_ITERATION()) BOOST_PP_ENUM(BOOST_PP_ITERATION(), LUABIND_OPERATOR_PARAMS, _) )
 433         {
 434                 assert(name && "luabind::call_function() expects a function name");
 435                 typedef boost::tuples::tuple<BOOST_PP_ENUM(BOOST_PP_ITERATION(), LUABIND_TUPLE_PARAMS, _)> tuple_t;
 436 #if BOOST_PP_ITERATION() == 0
 437                 tuple_t args;
 438 #else
 439                 tuple_t args(BOOST_PP_ENUM_PARAMS(BOOST_PP_ITERATION(), &a));
 440 #endif
 441                 typedef typename boost::mpl::if_<boost::is_void<Ret>
 442                         , luabind::detail::proxy_function_void_caller<boost::tuples::tuple<BOOST_PP_ENUM(BOOST_PP_ITERATION(), LUABIND_TUPLE_PARAMS, _)> >
 443                         , luabind::detail::proxy_function_caller<Ret, boost::tuples::tuple<BOOST_PP_ENUM(BOOST_PP_ITERATION(), LUABIND_TUPLE_PARAMS, _)> > >::type proxy_type;
 444
 445                 lua_pushstring(L, name);
 446                 lua_gettable(L, LUA_GLOBALSINDEX);
 447
 448                 return proxy_type(L, 1, &detail::pcall, args);
 449         }
 450
 451         template<class Ret BOOST_PP_COMMA_IF(BOOST_PP_ITERATION()) BOOST_PP_ENUM_PARAMS(BOOST_PP_ITERATION(), class A)>
 452         typename boost::mpl::if_<boost::is_void<Ret>
 453                         , luabind::detail::proxy_function_void_caller<boost::tuples::tuple<BOOST_PP_ENUM(BOOST_PP_ITERATION(), LUABIND_TUPLE_PARAMS, _)> >
 454                         , luabind::detail::proxy_function_caller<Ret, boost::tuples::tuple<BOOST_PP_ENUM(BOOST_PP_ITERATION(), LUABIND_TUPLE_PARAMS, _)> > >::type
 455         call_function(luabind::object const& obj BOOST_PP_COMMA_IF(BOOST_PP_ITERATION()) BOOST_PP_ENUM(BOOST_PP_ITERATION(), LUABIND_OPERATOR_PARAMS, _) )
 456         {
 457                 typedef boost::tuples::tuple<BOOST_PP_ENUM(BOOST_PP_ITERATION(), LUABIND_TUPLE_PARAMS, _)> tuple_t;
 458 #if BOOST_PP_ITERATION() == 0
 459                 tuple_t args;
 460 #else
 461                 tuple_t args(BOOST_PP_ENUM_PARAMS(BOOST_PP_ITERATION(), &a));
 462 #endif
 463                 typedef typename boost::mpl::if_<boost::is_void<Ret>
 464                         , luabind::detail::proxy_function_void_caller<boost::tuples::tuple<BOOST_PP_ENUM(BOOST_PP_ITERATION(), LUABIND_TUPLE_PARAMS, _)> >
 465                         , luabind::detail::proxy_function_caller<Ret, boost::tuples::tuple<BOOST_PP_ENUM(BOOST_PP_ITERATION(), LUABIND_TUPLE_PARAMS, _)> > >::type proxy_type;
 466
 467                 obj.push(obj.interpreter());
 468                 return proxy_type(obj.interpreter(), 1, &detail::pcall, args);
 469         }
 470
 471         template<class Ret BOOST_PP_COMMA_IF(BOOST_PP_ITERATION()) BOOST_PP_ENUM_PARAMS(BOOST_PP_ITERATION(), class A)>
 472         typename boost::mpl::if_<boost::is_void<Ret>
 473                         , luabind::detail::proxy_function_void_caller<boost::tuples::tuple<BOOST_PP_ENUM(BOOST_PP_ITERATION(), LUABIND_TUPLE_PARAMS, _)> >
 474                         , luabind::detail::proxy_function_caller<Ret, boost::tuples::tuple<BOOST_PP_ENUM(BOOST_PP_ITERATION(), LUABIND_TUPLE_PARAMS, _)> > >::type
 475         resume_function(lua_State* L, const char* name BOOST_PP_COMMA_IF(BOOST_PP_ITERATION()) BOOST_PP_ENUM(BOOST_PP_ITERATION(), LUABIND_OPERATOR_PARAMS, _) )
 476         {
 477                 assert(name && "luabind::resume_function() expects a function name");
 478                 typedef boost::tuples::tuple<BOOST_PP_ENUM(BOOST_PP_ITERATION(), LUABIND_TUPLE_PARAMS, _)> tuple_t;
 479 #if BOOST_PP_ITERATION() == 0
 480                 tuple_t args;
 481 #else
 482                 tuple_t args(BOOST_PP_ENUM_PARAMS(BOOST_PP_ITERATION(), &a));
 483 #endif
 484                 typedef typename boost::mpl::if_<boost::is_void<Ret>
 485                         , luabind::detail::proxy_function_void_caller<boost::tuples::tuple<BOOST_PP_ENUM(BOOST_PP_ITERATION(), LUABIND_TUPLE_PARAMS, _)> >
 486                         , luabind::detail::proxy_function_caller<Ret, boost::tuples::tuple<BOOST_PP_ENUM(BOOST_PP_ITERATION(), LUABIND_TUPLE_PARAMS, _)> > >::type proxy_type;
 487
 488                 lua_pushstring(L, name);
 489                 lua_gettable(L, LUA_GLOBALSINDEX);
 490
 491                 return proxy_type(L, 1, &detail::resume_impl, args);
 492         }
 493
 494         template<class Ret BOOST_PP_COMMA_IF(BOOST_PP_ITERATION()) BOOST_PP_ENUM_PARAMS(BOOST_PP_ITERATION(), class A)>
 495         typename boost::mpl::if_<boost::is_void<Ret>
 496                         , luabind::detail::proxy_function_void_caller<boost::tuples::tuple<BOOST_PP_ENUM(BOOST_PP_ITERATION(), LUABIND_TUPLE_PARAMS, _)> >
 497                         , luabind::detail::proxy_function_caller<Ret, boost::tuples::tuple<BOOST_PP_ENUM(BOOST_PP_ITERATION(), LUABIND_TUPLE_PARAMS, _)> > >::type
 498         resume_function(luabind::object const& obj BOOST_PP_COMMA_IF(BOOST_PP_ITERATION()) BOOST_PP_ENUM(BOOST_PP_ITERATION(), LUABIND_OPERATOR_PARAMS, _) )
 499         {
 500                 typedef boost::tuples::tuple<BOOST_PP_ENUM(BOOST_PP_ITERATION(), LUABIND_TUPLE_PARAMS, _)> tuple_t;
 501 #if BOOST_PP_ITERATION() == 0
 502                 tuple_t args;
 503 #else
 504                 tuple_t args(BOOST_PP_ENUM_PARAMS(BOOST_PP_ITERATION(), &a));
 505 #endif
 506                 typedef typename boost::mpl::if_<boost::is_void<Ret>
 507                         , luabind::detail::proxy_function_void_caller<boost::tuples::tuple<BOOST_PP_ENUM(BOOST_PP_ITERATION(), LUABIND_TUPLE_PARAMS, _)> >
 508                         , luabind::detail::proxy_function_caller<Ret, boost::tuples::tuple<BOOST_PP_ENUM(BOOST_PP_ITERATION(), LUABIND_TUPLE_PARAMS, _)> > >::type proxy_type;
 509
 510                 obj.push(obj.interpreter());
 511                 return proxy_type(obj.interpreter(), 1, &detail::resume_impl, args);
 512         }
 513
 514         template<class Ret BOOST_PP_COMMA_IF(BOOST_PP_ITERATION()) BOOST_PP_ENUM_PARAMS(BOOST_PP_ITERATION(), class A)>
 515         typename boost::mpl::if_<boost::is_void<Ret>
 516                         , luabind::detail::proxy_function_void_caller<boost::tuples::tuple<BOOST_PP_ENUM(BOOST_PP_ITERATION(), LUABIND_TUPLE_PARAMS, _)> >
 517                         , luabind::detail::proxy_function_caller<Ret, boost::tuples::tuple<BOOST_PP_ENUM(BOOST_PP_ITERATION(), LUABIND_TUPLE_PARAMS, _)> > >::type
 518         resume(lua_State* L BOOST_PP_COMMA_IF(BOOST_PP_ITERATION()) BOOST_PP_ENUM(BOOST_PP_ITERATION(), LUABIND_OPERATOR_PARAMS, _) )
 519         {
 520                 typedef boost::tuples::tuple<BOOST_PP_ENUM(BOOST_PP_ITERATION(), LUABIND_TUPLE_PARAMS, _)> tuple_t;
 521 #if BOOST_PP_ITERATION() == 0
 522                 tuple_t args;
 523 #else
 524                 tuple_t args(BOOST_PP_ENUM_PARAMS(BOOST_PP_ITERATION(), &a));
 525 #endif
 526                 typedef typename boost::mpl::if_<boost::is_void<Ret>
 527                         , luabind::detail::proxy_function_void_caller<boost::tuples::tuple<BOOST_PP_ENUM(BOOST_PP_ITERATION(), LUABIND_TUPLE_PARAMS, _)> >
 528                         , luabind::detail::proxy_function_caller<Ret, boost::tuples::tuple<BOOST_PP_ENUM(BOOST_PP_ITERATION(), LUABIND_TUPLE_PARAMS, _)> > >::type proxy_type;
 529
 530                 return proxy_type(L, 0, &detail::resume_impl, args);
 531         }
 532
 533
 534 #undef LUABIND_OPERATOR_PARAMS
 535 #undef LUABIND_TUPLE_PARAMS
 536
 537
 538 #endif
 539