module Blit:sig
..end
type('a, 'b)
t =src:'a -> src_pos:int -> dst:'b -> dst_pos:int -> len:int -> unit
val string_string : (Core_string.t, Core_string.t) t
val string_bigstring : (string, Make_substring.bigstring) t
val bigstring_bigstring : (Make_substring.bigstring, Make_substring.bigstring) t
val bigstring_string : (Make_substring.bigstring, string) t