typedef lex::lexertl::token<std::string::iterator> token_type;
typedef lex::lexertl::actor_lexer<token_type> base_lexer_type;
typedef multi_tokens<base_lexer_type> lexer_type;
typedef lex::lexertl::token<std::string::iterator> token_type;
typedef lex::lexertl::actor_lexer<token_type> base_lexer_type;
typedef multi_tokens<base_lexer_type> lexer_type;