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    <p>So I stole some of Luc Danton's sequence advice to sFuller and Pubby (about sequences), and I generated this "stop messing around with <code>operator,</code>" version:</p> <pre><code>#include &lt;iostream&gt; struct lua_State {}; template&lt;typename T&gt; T CheckLuaValue( int n, lua_State* l) { std::cout &lt;&lt; "arg[" &lt;&lt; n &lt;&lt; "] gotten\n"; return T(n); } template&lt;int ...&gt; struct seq { }; // generates a seq&lt; First, ..., Last-1 &gt; as "type" template&lt;int First, int Last&gt; struct gen_seq { template&lt;int N, int... S&gt; struct helper : helper&lt;N-1, N-1, S...&gt; {}; template&lt;int... S&gt; struct helper&lt;First, S...&gt; { typedef seq&lt;S...&gt; type; }; typedef typename helper&lt;Last&gt;::type type; }; template&lt; typename X &gt; struct MemberFunctionWrapper; template&lt; typename F &gt; struct MemberFunctionHelper { typedef F MethodPtr; }; template&lt;class InstanceType, typename ReturnType, typename... Params&gt; struct MemberFunctionWrapper&lt; ReturnType(InstanceType::*)(Params...) &gt; { typedef MemberFunctionHelper&lt;ReturnType(InstanceType::*)(Params...)&gt; Helper; typedef typename Helper::MethodPtr MethodPtr; static MethodPtr&amp; GetFunctionPointer() {static MethodPtr pFunc; return pFunc;} static InstanceType*&amp; GetMemberPointer() {static InstanceType* pThis;return pThis;} template&lt;int n, typename Param&gt; static auto GetLuaValue( lua_State* luaState )-&gt;decltype(CheckLuaValue&lt;Param&gt;(n,luaState)) { return CheckLuaValue&lt;Param&gt;(n,luaState); } template&lt; typename sequence &gt; struct call; template&lt; int... I &gt; struct call&lt;seq&lt;I...&gt;&gt; { ReturnType operator()( lua_State* luaState, InstanceType* instance, MethodPtr method ) const { return (instance-&gt;*method)( GetLuaValue&lt;I,Params&gt;( luaState )... ); } }; static int CFunctionWrapper( lua_State* luaState) { MethodPtr func = GetFunctionPointer(); InstanceType* instance = GetMemberPointer(); ReturnType retval = call&lt; typename gen_seq&lt; 1, sizeof...(Params)+1 &gt;::type &gt;()( luaState, instance, func ); return 0; } }; struct test{ int foo(int x, double d){std::cout &lt;&lt; "x:" &lt;&lt; x &lt;&lt; " d:" &lt;&lt; d &lt;&lt; "\n";}}; int main(){ typedef MemberFunctionWrapper&lt; int(test::*)(int, double) &gt; wrapper; test bar; wrapper::GetFunctionPointer() = &amp;test::foo; wrapper::GetMemberPointer() = &amp;bar; wrapper::CFunctionWrapper(0); } </code></pre> <p>now, note that the calls to CheckLuaValue can be out of order (ie, it can ask for arg 2 from Lua before arg 1), but the right one will be passed to the right argument.</p> <p>Here is a test run: <a href="http://ideone.com/XVmQQ6" rel="nofollow">http://ideone.com/XVmQQ6</a></p>
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