betterC CTFE nested switch

[Abby]

Hi there guys,
I was trying to generated code during compile time. Bassicly I'm 
creating a tokenizer and I would like to generated nested switch 
using betterC.

Basically convert something like this:

enum tokens =
[
     ['!', '='],
     ['>', '='],
     ['>'],
];

to:

switch(str[i])
{
     case '!':
         switch(str[i + 1])
         {
             case '=':
                 onToken(['!', '=']);
                 break;
             default: break;
         }
         break;
     case '>':
         switch(str[i + 1])
         {
             case '=':
                 onToken(['>', '=']);
                 break;
             default:
                 onToken(['>']);
                 break;
         }
         break;
     default: break;
}

but right now I'm stuck and I don't know how to achieve this. I 
was able to find out that:

1) Switches has to be labeled and the only way I know how to do 
so is to use string code and then mixing it. I was hoping for 
example to mixing only labels before switch and after continue 
and break but this does not seem to work :/

2) Format does not work in compile time using betterC (sprintf 
also does not work


Thank you very much for any kind if help
Kind regards Abby