include IncrementalEngine.SYMBOLS with type 'a terminal := 'a IT.terminal with type 'a nonterminal := 'a IT.nonterminal
val compare_terminals : 'a IT.terminal -> 'a IT.terminal -> int
val compare_nonterminals : 'a IT.nonterminal -> 'a IT.nonterminal -> int
val incoming_symbol : 'a IT.lr1state -> 'a symbol
val items : 'a IT.lr1state -> item list
val lhs : int -> xsymbol
val rhs : int -> xsymbol list
val nullable : 'a IT.nonterminal -> bool
val first : 'a IT.nonterminal -> 'a IT.terminal -> bool
val xfirst : xsymbol -> 'a IT.terminal -> bool
val foreach_terminal : (xsymbol -> 'a -> 'a) -> 'a -> 'a
val foreach_terminal_but_error : (xsymbol -> 'a -> 'a) -> 'a -> 'a
val feed : 'a symbol -> IncrementalEngine.position -> 'a -> IncrementalEngine.position -> 'a E.env -> 'a E.env