type index = int;;

type time = int;;

type basic = N of int
           | R of float
           | Vec of vector
	   | Zero
           | Error
and vector = < size : int; nth : (index -> basic) >;;

class type vector_type = 
	object
	  method size : int
	  method nth : index -> basic
	end;;

class type value_type = 
  object
    method get : basic
    method to_int : int
    method to_float : float
    method to_float_array : float array
    method to_string : string
    method normalize : unit
    method add : value_type -> value_type
    method neg : value_type
    method sub : value_type -> value_type
    method mul : value_type -> value_type
    method recip : value_type
    method div : value_type -> value_type
    method zero : value_type
    method floor : value_type
    method int : value_type
    method sin : value_type
    method cos : value_type
    method atan : value_type
    method sqrt : value_type
    method atan2 : value_type -> value_type
    method _mod : value_type -> value_type
    method larger : value_type -> value_type
    method smaller : value_type -> value_type
  end;;


type symbol = Add
  	    | Sub
	    | Mul
	    | Div
	    | Pass
	    | Stop
	    | Mem
	    | Delay
	    | Floor
	    | Int
	    | Sin
	    | Cos
	    | Atan
	    | Atan2
	    | Sqrt
	    | Rdtable
	    | Mod
	    | Vectorize
	    | Vconcat
	    | Vpick
	    | Serialize
	    | Larger
	    | Smaller
	    | Prefix
	    | Select2
	    | Select3


type faust_exp =
         Const of basic
       | Ident of symbol
       | Par   of faust_exp * faust_exp
       | Seq   of faust_exp * faust_exp
       | Rec   of faust_exp * faust_exp
       | Split of faust_exp * faust_exp
       | Merge of faust_exp * faust_exp


class type signal_type = 
    object
      method frequency : int
      method at : time -> value_type
      method add_memory : int -> unit
      method add : signal_type -> signal_type
      method neg : signal_type
      method sub : signal_type -> signal_type
      method mul : signal_type -> signal_type
      method div : signal_type -> signal_type
      method delay : signal_type -> signal_type
      method mem : signal_type
      method vectorize : signal_type -> signal_type
      method serialize : signal_type
      method vconcat : signal_type -> signal_type
      method vpick : signal_type -> signal_type
      method floor : signal_type
      method int : signal_type
      method sin : signal_type
      method cos : signal_type
      method atan : signal_type
      method atan2 : signal_type -> signal_type
      method sqrt : signal_type
      method _mod : signal_type -> signal_type
      method larger : signal_type -> signal_type
      method smaller : signal_type -> signal_type
      method rdtable : signal_type -> signal_type -> signal_type
      method select2 : signal_type -> signal_type -> signal_type
      method select3 : signal_type -> signal_type -> signal_type -> signal_type
      method prefix : signal_type -> signal_type
    end;;


class type beam_type =
    object
      method get : signal_type array
      method width : int
      method sub : int -> int -> beam_type
      method cut : int -> beam_type * beam_type
      method append : beam_type -> beam_type
      method matching : int -> beam_type
      method at : time -> value_type array
      method output : int -> value_type array array
      method frequency : int array
    end;;


class type dimension_type = 
  object
    method input : int
    method output : int
    method par : dimension_type -> dimension_type
    method seq : dimension_type -> dimension_type
    method split : dimension_type -> dimension_type
    method merge : dimension_type -> dimension_type
    method _rec : dimension_type -> dimension_type
  end;;


class type process_type = 
    object
      method exp : faust_exp
      method dim : dimension_type
      method delay : int
      method eval : beam_type -> beam_type
    end;;


class type io_type = 
    object
      method read : string array -> beam_type
      method write : int array -> value_type array array -> string array
    end;;