// Copyright (c) 2003 Daniel Wallin and Arvid Norberg
// Permission is hereby granted, free of charge, to any person obtaining a
// copy of this software and associated documentation files (the "Software"),
// to deal in the Software without restriction, including without limitation
// the rights to use, copy, modify, merge, publish, distribute, sublicense,
// and/or sell copies of the Software, and to permit persons to whom the
// Software is furnished to do so, subject to the following conditions:
// The above copyright notice and this permission notice shall be included
// in all copies or substantial portions of the Software.
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF
// ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED
// TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
// PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT
// SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR
// ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
// ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE
// OR OTHER DEALINGS IN THE SOFTWARE.
#if !BOOST_PP_IS_ITERATING
#ifndef LUABIND_CALL_MEMBER_HPP_INCLUDED
#define LUABIND_CALL_MEMBER_HPP_INCLUDED
#include <luabind/config.hpp>
#include <luabind/detail/convert_to_lua.hpp>
#include <luabind/detail/error.hpp>
namespace luabind
{
namespace detail
{
// if the proxy_member_caller returns non-void
template<class Ret, class Tuple>
class proxy_member_caller
{
// friend class luabind::object;
public:
proxy_member_caller(luabind::object* o, const char* name, const Tuple args)
: m_obj(o)
, m_member_name(name)
, m_args(args)
, m_called(false)
{
}
proxy_member_caller(const proxy_member_caller& rhs)
: m_obj(rhs.m_obj)
, m_member_name(rhs.m_member_name)
, m_args(rhs.m_args)
, m_called(rhs.m_called)
{
rhs.m_called = true;
}
~proxy_member_caller()
{
if (m_called) return;
m_called = true;
lua_State* L = m_obj->lua_state();
detail::stack_pop(L, 1); // pop the self reference
// get the function
m_obj->pushvalue();
lua_pushstring(L, m_member_name);
lua_gettable(L, -2);
// push the self-object
m_obj->pushvalue();
push_args_from_tuple<1>::apply(L, m_args);
if (lua_pcall(L, boost::tuples::length<Tuple>::value + 1, 0, 0))
{
#ifndef LUABIND_NO_EXCEPTIONS
throw luabind::error(L);
#else
error_callback_fun e = detail::error_callback::get().err;
if (e) e(L);
assert(0 && "the lua function threw an error and exceptions are disabled."
"If you want to handle this error use luabind::set_error_callback()");
std::terminate();
#endif
}
}
operator Ret()
{
typename default_policy::template generate_converter<Ret, lua_to_cpp>::type converter;
m_called = true;
lua_State* L = m_obj->lua_state();
detail::stack_pop p(L, 2); // pop the return value and the self reference
// get the function
m_obj->pushvalue();
lua_pushstring(L, m_member_name);
lua_gettable(L, -2);
// push the self-object
m_obj->pushvalue();
push_args_from_tuple<1>::apply(L, m_args);
if (lua_pcall(L, boost::tuples::length<Tuple>::value + 1, 1, 0))
{
#ifndef LUABIND_NO_EXCEPTIONS
throw luabind::error(L);
#else
error_callback_fun e = detail::error_callback::get().err;
if (e) e(L);
assert(0 && "the lua function threw an error and exceptions are disabled."
"If you want to handle this error use luabind::set_error_callback()");
std::terminate();
#endif
}
#ifndef LUABIND_NO_ERROR_CHECKING
if (converter.match(L, LUABIND_DECORATE_TYPE(Ret), -1) < 0)
{
#ifndef LUABIND_NO_EXCEPTIONS
throw cast_failed(L, LUABIND_TYPEID(Ret));
#else
cast_failed_callback_fun e = detail::error_callback::get().cast;
if (e) e(L, LUABIND_TYPEID(Ret));
assert(0 && "the lua function's return value could not be converted."
"If you want to handle this error use luabind::set_error_callback()");
std::terminate();
#endif
}
#endif
return converter.apply(L, LUABIND_DECORATE_TYPE(Ret), -1);
}
template<class Policies>
Ret operator[](const Policies& p)
{
typedef typename find_conversion_policy<0, Policies>::type converter_policy;
typename converter_policy::template generate_converter<Ret, lua_to_cpp>::type converter;
m_called = true;
lua_State* L = m_obj->lua_state();
detail::stack_pop popper(L, 2); // pop the return value and the self reference
// get the function
m_obj->pushvalue();
lua_pushstring(L, m_member_name);
lua_gettable(L, -2);
// push the self-object
m_obj->pushvalue();
detail::push_args_from_tuple<1>::apply(L, m_args, p);
if (lua_pcall(L, boost::tuples::length<Tuple>::value + 1, 1, 0))
{
#ifndef LUABIND_NO_EXCEPTIONS
throw error(L);
#else
error_callback_fun e = detail::error_callback::get().err;
if (e) e(L);
assert(0 && "the lua function threw an error and exceptions are disabled."
"If you want to handle this error use luabind::set_error_callback()");
std::terminate();
#endif
}
#ifndef LUABIND_NO_ERROR_CHECKING
if (converter.match(L, LUABIND_DECORATE_TYPE(Ret), -1) < 0)
{
#ifndef LUABIND_NO_EXCEPTIONS
throw cast_failed(L, LUABIND_TYPEID(Ret));
#else
cast_failed_callback_fun e = detail::error_callback::get().cast;
if (e) e(L, LUABIND_TYPEID(Ret));
assert(0 && "the lua function's return value could not be converted."
"If you want to handle this error use luabind::set_error_callback()");
std::terminate();
#endif
}
#endif
return converter.apply(L, LUABIND_DECORATE_TYPE(Ret), -1);
}
private:
luabind::object* m_obj;
const char* m_member_name;
Tuple m_args;
mutable bool m_called;
};
// if the proxy_member_caller returns void
template<class Tuple>
class proxy_member_void_caller
{
friend class luabind::object;
public:
proxy_member_void_caller(luabind::object* o, const char* name, const Tuple args)
: m_obj(o)
, m_member_name(name)
, m_args(args)
, m_called(false)
{
}
proxy_member_void_caller(const proxy_member_void_caller& rhs)
: m_obj(rhs.m_obj)
, m_member_name(rhs.m_member_name)
, m_args(rhs.m_args)
, m_called(rhs.m_called)
{
rhs.m_called = true;
}
~proxy_member_void_caller()
{
if (m_called) return;
m_called = true;
lua_State* L = m_obj->lua_state();
detail::stack_pop(L, 1); // pop the self reference
// get the function
m_obj->pushvalue();
lua_pushstring(L, m_member_name);
lua_gettable(L, -2);
// push the self-object
m_obj->pushvalue();
push_args_from_tuple<1>::apply(L, m_args);
if (lua_pcall(L, boost::tuples::length<Tuple>::value + 1, 0, 0))
{
#ifndef LUABIND_NO_EXCEPTIONS
throw luabind::error(L);
#else
error_callback_fun e = detail::error_callback::get().err;
if (e) e(L);
assert(0 && "the lua function threw an error and exceptions are disabled."
"If you want to handle this error use luabind::set_error_callback()");
std::terminate();
#endif
}
}
template<class Policies>
void operator[](const Policies& p)
{
m_called = true;
lua_State* L = m_obj->lua_state();
detail::stack_pop(L, 1); // pop the self reference
// get the function
m_obj->pushvalue();
lua_pushstring(L, m_member_name);
lua_gettable(L, -2);
// push the self-object
m_obj->pushvalue();
detail::push_args_from_tuple<1>::apply(L, m_args, p);
if (lua_pcall(L, boost::tuples::length<Tuple>::value + 1, 0, 0))
{
#ifndef LUABIND_NO_EXCEPTIONS
throw error(L);
#else
error_callback_fun e = detail::error_callback::get().err;
if (e) e(L);
assert(0 && "the lua function threw an error and exceptions are disabled."
"If you want to handle this error use luabind::set_error_callback()");
std::terminate();
#endif
}
}
private:
luabind::object* m_obj;
const char* m_member_name;
Tuple m_args;
mutable bool m_called;
};
} // detail
#define BOOST_PP_ITERATION_PARAMS_1 (4, (0, LUABIND_MAX_ARITY, <luabind/detail/call_member.hpp>, 1))
#include BOOST_PP_ITERATE()
}
#endif // LUABIND_CALL_MEMBER_HPP_INCLUDED
#else
#define LUABIND_TUPLE_PARAMS(z, n, data) const A##n *
#define LUABIND_OPERATOR_PARAMS(z, n, data) const A##n & a##n
template<class R BOOST_PP_COMMA_IF(BOOST_PP_ITERATION()) BOOST_PP_ENUM_PARAMS(BOOST_PP_ITERATION(), class A)>
typename boost::mpl::if_<boost::is_void<R>
, luabind::detail::proxy_member_void_caller<boost::tuples::tuple<BOOST_PP_ENUM(BOOST_PP_ITERATION(), LUABIND_TUPLE_PARAMS, _)> >
, luabind::detail::proxy_member_caller<R, boost::tuples::tuple<BOOST_PP_ENUM(BOOST_PP_ITERATION(), LUABIND_TUPLE_PARAMS, _)> > >::type
call_member(luabind::object& obj, const char* name BOOST_PP_COMMA_IF(BOOST_PP_ITERATION())BOOST_PP_ENUM(BOOST_PP_ITERATION(), LUABIND_OPERATOR_PARAMS, _))
{
typedef boost::tuples::tuple<BOOST_PP_ENUM(BOOST_PP_ITERATION(), LUABIND_TUPLE_PARAMS, _)> tuple_t;
#if BOOST_PP_ITERATION() == 0
tuple_t args;
#else
tuple_t args(BOOST_PP_ENUM_PARAMS(BOOST_PP_ITERATION(), &a));
#endif
typedef typename boost::mpl::if_<boost::is_void<R>
, luabind::detail::proxy_member_void_caller<boost::tuples::tuple<BOOST_PP_ENUM(BOOST_PP_ITERATION(), LUABIND_TUPLE_PARAMS, _)> >
, luabind::detail::proxy_member_caller<R, boost::tuples::tuple<BOOST_PP_ENUM(BOOST_PP_ITERATION(), LUABIND_TUPLE_PARAMS, _)> > >::type proxy_type;
return proxy_type(const_cast<luabind::object*>(&obj), name, args);
}
#undef LUABIND_OPERATOR_PARAMS
#undef LUABIND_TUPLE_PARAMS
#endif
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