Metaprogramming work around

["Erèbe"]

Hi,

I'm working on some metaprogramming code which implement a 
Factory and generate an enum from a list of string.

So here my questions :

1) The documentation say mixin templates could take as 
TemplateParameterList
a "TemplateParameter , TemplateParameterList" but all my tried to 
instaciate this template failed lamentably.

mixin template Foo(T, R...)
{

    anotherTemplate!(T);
    Foo!(R);

}

mixin Foo!( string, string, string);

Is something wrong with variadic template and mixin, do i miss 
something ?


2) Below some code I writed and I wanted to know if you have some 
advice to improve it (Right maner to do it, TypeChecking, Safety, 
...) <- variaidc arguments


The code is working is purpose is to create an enum of commands 
and to create a factory which returns me the command associated 
to a string.

Thanks !

===========================Code============================================
import std.stdio;
import std.traits;
import std.conv;


//Use to create the enums of every commands
mixin template enumGenerator( T... )
{

     template generate( T... )
     {
         enum string value = T[0] ~ ", " ~ generate!( T[2..$] 
).value;
     }

     template generate() { enum string value = "UNKNOW"; }


     //Here the creation of the enum
     mixin("enum Command { " ~ generate!(T).value ~ "};");

}

//Generate a function which return a command in regard of a string
mixin template factoryGenerator( T... )
{
     template generate( T... )
     {
         enum string value = "if( cmd == \"" ~ T[1] ~ "\")"
                                 ~ "return Command." ~ T[0] ~ ";"
                             ~ "else "
                                 ~ generate!(T[2..$]).value;
     }

     template generate() { enum string value = "return 
Command.UNKNOW;"; }

     //The function in question
     auto CommandFactory( string cmd )
     {
             mixin( generate!(T).value );
     }

}


mixin template IrcCommands( T... )
{

    mixin enumGenerator!( T );
    mixin factoryGenerator!( T );

}


void main()
{

                        /*Command*/     /*String associated*/
    mixin IrcCommands!( "Connected",    "001",
                        "NicknameUsed", "433",
                        "Message",      "PRIVMSG",
                        "UserLeaved",   "PART",
                        "UserJoined",   "JOIN",
                        "UserQuit",     "QUIT"
                        "Ping",         "PING" );

    writefln( to!string(CommandFactory("001")) );


}