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Module Pre_sexp

module Pre_sexp: sig .. end
include Type
exception Of_sexp_error of exn * t
type bigstring = (char, Bigarray.int8_unsigned_elt, Bigarray.c_layout) Bigarray.Array1.t 
val default_indent : int Pervasives.ref
val must_escape : string -> bool
val maybe_esc_str : string -> string
val pp_maybe_esc_str : Format.formatter -> string -> unit
val pp_hum_indent : int -> Format.formatter -> t -> unit
val pp_hum_rest : int -> Format.formatter -> t list -> unit
val pp_mach_internal : bool -> Format.formatter -> t -> bool
val pp_mach_rest : bool -> Format.formatter -> t list -> unit
val pp_hum : Format.formatter -> t -> unit
val pp_mach : Format.formatter -> t -> unit
val pp : Format.formatter -> t -> unit
val size_loop : int * int -> t -> int * int
val size : t -> int * int
val to_buffer_hum : buf:Buffer.t -> ?indent:int -> t -> unit
val to_buffer_mach : buf:Buffer.t -> t -> unit
val to_buffer : buf:Buffer.t -> t -> unit
val to_buffer_gen : buf:'a ->
       add_char:('a -> char -> unit) -> add_string:('a -> string -> 'b) -> t -> unit
val buffer : unit -> Buffer.t
val with_new_buffer : Pervasives.out_channel -> (Buffer.t -> 'a) -> unit
val output_hum : Pervasives.out_channel -> t -> unit
val output_hum_indent : int -> Pervasives.out_channel -> t -> unit
val output_mach : Pervasives.out_channel -> t -> unit
val output : Pervasives.out_channel -> t -> unit
module Tmp_file: sig .. end
val save_of_output : ?perm:int -> (Pervasives.out_channel -> 'a -> 'b) -> string -> 'a -> unit
val output_sexp_nl : (Pervasives.out_channel -> 'a -> 'b) -> Pervasives.out_channel -> 'a -> unit
val save_hum : ?perm:int -> string -> t -> unit
val save_mach : ?perm:int -> string -> t -> unit
val save : ?perm:int -> string -> t -> unit
val output_sexps_nl : (Pervasives.out_channel -> 'a -> 'b) ->
       Pervasives.out_channel -> 'a list -> unit
val save_sexps_hum : ?perm:int -> string -> t list -> unit
val save_sexps_mach : ?perm:int -> string -> t list -> unit
val save_sexps : ?perm:int -> string -> t list -> unit
val to_string_hum : ?indent:int -> t -> string
val to_string_mach : t -> string
val to_string : t -> string
val scan_sexp : ?buf:Buffer.t -> Lexing.lexbuf -> Type.t
val scan_sexps : ?buf:Buffer.t -> Lexing.lexbuf -> Type.t list
val get_main_buf : Buffer.t option -> Lexing.lexbuf -> Parser.token
val scan_fold_sexps : ?buf:Buffer.t -> f:('a -> Type.t -> 'a) -> init:'a -> Lexing.lexbuf -> 'a
val scan_iter_sexps : ?buf:Buffer.t -> f:(Type.t -> unit) -> Lexing.lexbuf -> unit
val scan_sexps_conv : ?buf:Buffer.t -> f:(Type.t -> 'a) -> Lexing.lexbuf -> 'a list
module Annot: sig .. end
module Parse_pos: sig .. end
module Cont_state: sig .. end
type ('a, 't) parse_result =
| Done of 't * Parse_pos.t
| Cont of Cont_state.t * ('a, 't) parse_fun 
type ('a, 't) parse_fun = pos:int -> len:int -> 'a -> ('a, 't) parse_result 
type 't parse_state = {
   parse_pos :Parse_pos.t;
   mutable pstack :'t;
   pbuf :Buffer.t;
} 
type parse_error = {
   location :string;
   err_msg :string;
   parse_state :[ `Annot of Annot.stack parse_state
| `Sexp of t list list parse_state ];
} 
exception Parse_error of parse_error
val bump_text_line : 'a parse_state -> unit
val bump_text_pos : 'a parse_state -> unit
val bump_pos_cont : 'a parse_state ->
       'b ->
       max_pos:'c ->
       pos:int ->
       ('a parse_state -> 'b -> max_pos:'c -> pos:int -> 'd) -> 'd
val bump_line_cont : 'a parse_state ->
       'b ->
       max_pos:'c ->
       pos:int ->
       ('a parse_state -> 'b -> max_pos:'c -> pos:int -> 'd) -> 'd
val add_bump : ('a parse_state -> 'b) ->
       'a parse_state ->
       'c ->
       max_pos:'d ->
       pos:int ->
       char -> ('a parse_state -> 'c -> max_pos:'d -> pos:int -> 'e) -> 'e
val add_bump_pos : 'a parse_state ->
       'b ->
       max_pos:'c ->
       pos:int ->
       char -> ('a parse_state -> 'b -> max_pos:'c -> pos:int -> 'd) -> 'd
val add_bump_line : 'a parse_state ->
       'b ->
       max_pos:'c ->
       pos:int ->
       char -> ('a parse_state -> 'b -> max_pos:'c -> pos:int -> 'd) -> 'd
val set_parse_pos : Parse_pos.t -> int -> unit
val mk_parse_pos : 'a parse_state -> int -> Parse_pos.t
val raise_parse_error : [ `Annot of Annot.stack parse_state
       | `Sexp of t list list parse_state ] ->
       string -> int -> string -> 'a
val raise_unexpected_char : [ `Annot of Annot.stack parse_state
       | `Sexp of t list list parse_state ] -> string -> int -> char -> 'a
val mk_cont_parser : (pos:int -> len:int -> 'a -> 'b) -> 'c -> 'a -> max_pos:int -> pos:int -> 'b
val bump_found_atom : (Annot.stack parse_state -> 'a) ->
       Annot.stack parse_state ->
       'b ->
       max_pos:'c ->
       pos:int ->
       (Annot.stack parse_state ->
        'b -> max_pos:'c -> pos:int -> ('d, Annot.t) parse_result) ->
       ('d, Annot.t) parse_result
val check_str_bounds : string -> pos:int -> len:int -> bigstring -> int
val mk_cont_state : string ->
       ('a ->
        bigstring ->
        max_pos:int -> pos:int -> (bigstring, 'b) parse_result) ->
       'a ->
       cont_state:Cont_state.t ->
       (bigstring, 'b) parse_result
val mk_cont : string ->
       (Annot.stack parse_state ->
        bigstring ->
        max_pos:int -> pos:int -> (bigstring, 'a) parse_result) ->
       Annot.stack parse_state ->
       (bigstring, 'a) parse_result
val parse_str : ?parse_pos:Parse_pos.t ->
       ?len:int -> string -> (string, t) parse_result
val parse_nl : Annot.stack parse_state ->
       bigstring ->
       max_pos:int ->
       pos:int -> (bigstring, Annot.t) parse_result
val parse_comment : Annot.stack parse_state ->
       bigstring ->
       max_pos:int ->
       pos:int -> (bigstring, Annot.t) parse_result
val maybe_parse_comment : Annot.stack parse_state ->
       bigstring ->
       max_pos:int ->
       pos:int -> (bigstring, Annot.t) parse_result
val maybe_parse_close_comment : Annot.stack parse_state ->
       bigstring ->
       max_pos:int ->
       pos:int -> (bigstring, Annot.t) parse_result
val parse_sexp_comment : Annot.stack parse_state ->
       bigstring ->
       max_pos:int ->
       pos:int -> (bigstring, Annot.t) parse_result
val parse_block_comment : Annot.stack parse_state ->
       bigstring ->
       max_pos:int ->
       pos:int -> (bigstring, Annot.t) parse_result
val parse_atom : Annot.stack parse_state ->
       bigstring ->
       max_pos:int ->
       pos:int -> (bigstring, Annot.t) parse_result
val maybe_parse_bad_atom_pipe : Annot.stack parse_state ->
       bigstring ->
       max_pos:int ->
       pos:int -> (bigstring, Annot.t) parse_result
val maybe_parse_bad_atom_hash : Annot.stack parse_state ->
       bigstring ->
       max_pos:int ->
       pos:int -> (bigstring, Annot.t) parse_result
val reg_parse_quoted : Annot.stack parse_state ->
       bigstring ->
       max_pos:int ->
       pos:int -> (bigstring, Annot.t) parse_result
val parse_quoted : Annot.stack parse_state ->
       bigstring ->
       max_pos:int ->
       pos:int -> (bigstring, Annot.t) parse_result
val parse_escaped : Annot.stack parse_state ->
       bigstring ->
       max_pos:int ->
       pos:int -> (bigstring, Annot.t) parse_result
val parse_skip_ws : Annot.stack parse_state ->
       bigstring ->
       max_pos:int ->
       pos:int -> (bigstring, Annot.t) parse_result
val parse_skip_ws_nl : Annot.stack parse_state ->
       bigstring ->
       max_pos:int ->
       pos:int -> (bigstring, Annot.t) parse_result
val parse_dec : Annot.stack parse_state ->
       bigstring ->
       max_pos:int ->
       pos:int ->
       count:int ->
       d:int -> (bigstring, Annot.t) parse_result
val parse_hex : Annot.stack parse_state ->
       bigstring ->
       max_pos:int ->
       pos:int ->
       count:int ->
       d:int -> (bigstring, Annot.t) parse_result
val parse_str : ?parse_pos:Parse_pos.t ->
       ?len:int -> string -> (string, t) parse_result
val parse : ?parse_pos:Parse_pos.t ->
       ?len:int -> string -> (string, t) parse_result
val get_glob_ofs : Parse_pos.t -> int -> int
val mk_annot_pos : Parse_pos.t -> int -> Annot.pos
val mk_annot_pos1 : Parse_pos.t -> int -> Annot.pos
val add_annot_pos : Annot.stack parse_state -> int -> unit
val add_annot_pos1 : Annot.stack parse_state -> int -> unit
val get_annot_range : Annot.stack parse_state -> int -> Annot.range
val mk_annot_atom : Annot.stack parse_state ->
       string -> int -> Annot.t
val mk_annot_list : Annot.stack parse_state ->
       Annot.t list -> int -> Annot.t
val init_annot_pstate : unit -> Annot.stack
val bump_found_atom : (Annot.stack parse_state -> 'a) ->
       Annot.stack parse_state ->
       'b ->
       max_pos:'c ->
       pos:int ->
       (Annot.stack parse_state ->
        'b -> max_pos:'c -> pos:int -> ('d, Annot.t) parse_result) ->
       ('d, Annot.t) parse_result
val check_str_bounds : string -> pos:int -> len:int -> bigstring -> int
val mk_cont_state : string ->
       ('a ->
        bigstring ->
        max_pos:int -> pos:int -> (bigstring, 'b) parse_result) ->
       'a ->
       cont_state:Cont_state.t ->
       (bigstring, 'b) parse_result
val mk_cont : string ->
       (Annot.stack parse_state ->
        bigstring ->
        max_pos:int -> pos:int -> (bigstring, 'a) parse_result) ->
       Annot.stack parse_state ->
       (bigstring, 'a) parse_result
val parse_str_annot : ?parse_pos:Parse_pos.t ->
       ?len:int -> string -> (string, Annot.t) parse_result
val parse_nl : Annot.stack parse_state ->
       bigstring ->
       max_pos:int ->
       pos:int -> (bigstring, Annot.t) parse_result
val parse_comment : Annot.stack parse_state ->
       bigstring ->
       max_pos:int ->
       pos:int -> (bigstring, Annot.t) parse_result
val maybe_parse_comment : Annot.stack parse_state ->
       bigstring ->
       max_pos:int ->
       pos:int -> (bigstring, Annot.t) parse_result
val maybe_parse_close_comment : Annot.stack parse_state ->
       bigstring ->
       max_pos:int ->
       pos:int -> (bigstring, Annot.t) parse_result
val parse_sexp_comment : Annot.stack parse_state ->
       bigstring ->
       max_pos:int ->
       pos:int -> (bigstring, Annot.t) parse_result
val parse_block_comment : Annot.stack parse_state ->
       bigstring ->
       max_pos:int ->
       pos:int -> (bigstring, Annot.t) parse_result
val parse_atom : Annot.stack parse_state ->
       bigstring ->
       max_pos:int ->
       pos:int -> (bigstring, Annot.t) parse_result
val maybe_parse_bad_atom_pipe : Annot.stack parse_state ->
       bigstring ->
       max_pos:int ->
       pos:int -> (bigstring, Annot.t) parse_result
val maybe_parse_bad_atom_hash : Annot.stack parse_state ->
       bigstring ->
       max_pos:int ->
       pos:int -> (bigstring, Annot.t) parse_result
val reg_parse_quoted : Annot.stack parse_state ->
       bigstring ->
       max_pos:int ->
       pos:int -> (bigstring, Annot.t) parse_result
val parse_quoted : Annot.stack parse_state ->
       bigstring ->
       max_pos:int ->
       pos:int -> (bigstring, Annot.t) parse_result
val parse_escaped : Annot.stack parse_state ->
       bigstring ->
       max_pos:int ->
       pos:int -> (bigstring, Annot.t) parse_result
val parse_skip_ws : Annot.stack parse_state ->
       bigstring ->
       max_pos:int ->
       pos:int -> (bigstring, Annot.t) parse_result
val parse_skip_ws_nl : Annot.stack parse_state ->
       bigstring ->
       max_pos:int ->
       pos:int -> (bigstring, Annot.t) parse_result
val parse_dec : Annot.stack parse_state ->
       bigstring ->
       max_pos:int ->
       pos:int ->
       count:int ->
       d:int -> (bigstring, Annot.t) parse_result
val parse_hex : Annot.stack parse_state ->
       bigstring ->
       max_pos:int ->
       pos:int ->
       count:int ->
       d:int -> (bigstring, Annot.t) parse_result
val parse_str_annot : ?parse_pos:Parse_pos.t ->
       ?len:int -> string -> (string, Annot.t) parse_result
val bump_found_atom : (Annot.stack parse_state -> 'a) ->
       Annot.stack parse_state ->
       'b ->
       max_pos:'c ->
       pos:int ->
       (Annot.stack parse_state ->
        'b -> max_pos:'c -> pos:int -> ('d, Annot.t) parse_result) ->
       ('d, Annot.t) parse_result
val check_str_bounds : string -> pos:int -> len:int -> bigstring -> int
val mk_cont_state : string ->
       ('a ->
        bigstring ->
        max_pos:int -> pos:int -> (bigstring, 'b) parse_result) ->
       'a ->
       cont_state:Cont_state.t ->
       (bigstring, 'b) parse_result
val mk_cont : string ->
       (Annot.stack parse_state ->
        bigstring ->
        max_pos:int -> pos:int -> (bigstring, 'a) parse_result) ->
       Annot.stack parse_state ->
       (bigstring, 'a) parse_result
val parse_bigstring : ?parse_pos:Parse_pos.t ->
       ?len:int ->
       bigstring -> (bigstring, t) parse_result
val parse_nl : Annot.stack parse_state ->
       bigstring ->
       max_pos:int ->
       pos:int -> (bigstring, Annot.t) parse_result
val parse_comment : Annot.stack parse_state ->
       bigstring ->
       max_pos:int ->
       pos:int -> (bigstring, Annot.t) parse_result
val maybe_parse_comment : Annot.stack parse_state ->
       bigstring ->
       max_pos:int ->
       pos:int -> (bigstring, Annot.t) parse_result
val maybe_parse_close_comment : Annot.stack parse_state ->
       bigstring ->
       max_pos:int ->
       pos:int -> (bigstring, Annot.t) parse_result
val parse_sexp_comment : Annot.stack parse_state ->
       bigstring ->
       max_pos:int ->
       pos:int -> (bigstring, Annot.t) parse_result
val parse_block_comment : Annot.stack parse_state ->
       bigstring ->
       max_pos:int ->
       pos:int -> (bigstring, Annot.t) parse_result
val parse_atom : Annot.stack parse_state ->
       bigstring ->
       max_pos:int ->
       pos:int -> (bigstring, Annot.t) parse_result
val maybe_parse_bad_atom_pipe : Annot.stack parse_state ->
       bigstring ->
       max_pos:int ->
       pos:int -> (bigstring, Annot.t) parse_result
val maybe_parse_bad_atom_hash : Annot.stack parse_state ->
       bigstring ->
       max_pos:int ->
       pos:int -> (bigstring, Annot.t) parse_result
val reg_parse_quoted : Annot.stack parse_state ->
       bigstring ->
       max_pos:int ->
       pos:int -> (bigstring, Annot.t) parse_result
val parse_quoted : Annot.stack parse_state ->
       bigstring ->
       max_pos:int ->
       pos:int -> (bigstring, Annot.t) parse_result
val parse_escaped : Annot.stack parse_state ->
       bigstring ->
       max_pos:int ->
       pos:int -> (bigstring, Annot.t) parse_result
val parse_skip_ws : Annot.stack parse_state ->
       bigstring ->
       max_pos:int ->
       pos:int -> (bigstring, Annot.t) parse_result
val parse_skip_ws_nl : Annot.stack parse_state ->
       bigstring ->
       max_pos:int ->
       pos:int -> (bigstring, Annot.t) parse_result
val parse_dec : Annot.stack parse_state ->
       bigstring ->
       max_pos:int ->
       pos:int ->
       count:int ->
       d:int -> (bigstring, Annot.t) parse_result
val parse_hex : Annot.stack parse_state ->
       bigstring ->
       max_pos:int ->
       pos:int ->
       count:int ->
       d:int -> (bigstring, Annot.t) parse_result
val parse_bigstring : ?parse_pos:Parse_pos.t ->
       ?len:int ->
       bigstring -> (bigstring, t) parse_result
val bump_found_atom : (Annot.stack parse_state -> 'a) ->
       Annot.stack parse_state ->
       'b ->
       max_pos:'c ->
       pos:int ->
       (Annot.stack parse_state ->
        'b -> max_pos:'c -> pos:int -> ('d, Annot.t) parse_result) ->
       ('d, Annot.t) parse_result
val check_str_bounds : string -> pos:int -> len:int -> bigstring -> int
val mk_cont_state : string ->
       ('a ->
        bigstring ->
        max_pos:int -> pos:int -> (bigstring, 'b) parse_result) ->
       'a ->
       cont_state:Cont_state.t ->
       (bigstring, 'b) parse_result
val mk_cont : string ->
       (Annot.stack parse_state ->
        bigstring ->
        max_pos:int -> pos:int -> (bigstring, 'a) parse_result) ->
       Annot.stack parse_state ->
       (bigstring, 'a) parse_result
val parse_bigstring_annot : ?parse_pos:Parse_pos.t ->
       ?len:int ->
       bigstring ->
       (bigstring, Annot.t) parse_result
val parse_nl : Annot.stack parse_state ->
       bigstring ->
       max_pos:int ->
       pos:int -> (bigstring, Annot.t) parse_result
val parse_comment : Annot.stack parse_state ->
       bigstring ->
       max_pos:int ->
       pos:int -> (bigstring, Annot.t) parse_result
val maybe_parse_comment : Annot.stack parse_state ->
       bigstring ->
       max_pos:int ->
       pos:int -> (bigstring, Annot.t) parse_result
val maybe_parse_close_comment : Annot.stack parse_state ->
       bigstring ->
       max_pos:int ->
       pos:int -> (bigstring, Annot.t) parse_result
val parse_sexp_comment : Annot.stack parse_state ->
       bigstring ->
       max_pos:int ->
       pos:int -> (bigstring, Annot.t) parse_result
val parse_block_comment : Annot.stack parse_state ->
       bigstring ->
       max_pos:int ->
       pos:int -> (bigstring, Annot.t) parse_result
val parse_atom : Annot.stack parse_state ->
       bigstring ->
       max_pos:int ->
       pos:int -> (bigstring, Annot.t) parse_result
val maybe_parse_bad_atom_pipe : Annot.stack parse_state ->
       bigstring ->
       max_pos:int ->
       pos:int -> (bigstring, Annot.t) parse_result
val maybe_parse_bad_atom_hash : Annot.stack parse_state ->
       bigstring ->
       max_pos:int ->
       pos:int -> (bigstring, Annot.t) parse_result
val reg_parse_quoted : Annot.stack parse_state ->
       bigstring ->
       max_pos:int ->
       pos:int -> (bigstring, Annot.t) parse_result
val parse_quoted : Annot.stack parse_state ->
       bigstring ->
       max_pos:int ->
       pos:int -> (bigstring, Annot.t) parse_result
val parse_escaped : Annot.stack parse_state ->
       bigstring ->
       max_pos:int ->
       pos:int -> (bigstring, Annot.t) parse_result
val parse_skip_ws : Annot.stack parse_state ->
       bigstring ->
       max_pos:int ->
       pos:int -> (bigstring, Annot.t) parse_result
val parse_skip_ws_nl : Annot.stack parse_state ->
       bigstring ->
       max_pos:int ->
       pos:int -> (bigstring, Annot.t) parse_result
val parse_dec : Annot.stack parse_state ->
       bigstring ->
       max_pos:int ->
       pos:int ->
       count:int ->
       d:int -> (bigstring, Annot.t) parse_result
val parse_hex : Annot.stack parse_state ->
       bigstring ->
       max_pos:int ->
       pos:int ->
       count:int ->
       d:int -> (bigstring, Annot.t) parse_result
val parse_bigstring_annot : ?parse_pos:Parse_pos.t ->
       ?len:int ->
       bigstring ->
       (bigstring, Annot.t) parse_result
val mk_this_parse : ?parse_pos:Parse_pos.t ->
       (?parse_pos:Parse_pos.t -> ?len:'a -> 'b -> 'c) ->
       pos:int -> len:'a -> 'b -> 'c
val gen_input_sexp : (?parse_pos:Parse_pos.t ->
        ?len:int -> string -> (string, 'a) parse_result) ->
       ?parse_pos:Parse_pos.t -> Pervasives.in_channel -> 'a
val input_sexp : ?parse_pos:Parse_pos.t -> Pervasives.in_channel -> t
val gen_input_rev_sexps : (?parse_pos:Parse_pos.t ->
        ?len:int -> string -> (string, 'a) parse_result) ->
       ?parse_pos:Parse_pos.t ->
       ?buf:string -> Pervasives.in_channel -> 'a list
val input_rev_sexps : ?parse_pos:Parse_pos.t ->
       ?buf:string -> Pervasives.in_channel -> t list
val input_sexps : ?parse_pos:Parse_pos.t ->
       ?buf:string -> Pervasives.in_channel -> t list
val of_string_bigstring : string ->
       ('a -> ('b, 'c) parse_result) ->
       'b -> ('a -> int) -> ('a -> int -> int -> string) -> 'a -> 'c
val of_string : string -> t
val get_bstr_sub_str : (char, 'a, 'b) Bigarray.Array1.t -> int -> int -> string
val bstr_ws_buf : (char, Bigarray.int8_unsigned_elt, Bigarray.c_layout) Bigarray.Array1.t
val of_bigstring : bigstring -> t
val gen_load_rev_sexps : (?parse_pos:'a -> ?buf:'b -> Pervasives.in_channel -> 'c) ->
       ?buf:'b -> string -> 'c
val load_rev_sexps : ?buf:string -> string -> t list
val load_sexps : ?buf:string -> string -> t list
val gen_load_sexp : (?parse_pos:Parse_pos.t ->
        ?len:int -> string -> (string, 'a) parse_result) ->
       ?strict:bool -> ?buf:string -> string -> 'a
val load_sexp : ?strict:bool -> ?buf:string -> string -> t
module Annotated: sig .. end
val load_sexp_conv : ?strict:bool ->
       ?buf:string ->
       string ->
       (t -> 'a) -> [> `Error of exn * Annotated.t | `Result of 'a ]
val raise_conv_exn : file:string ->
       [< `Error of exn * Annotated.t | `Result of 'a ] -> 'a
val load_sexp_conv_exn : ?strict:bool -> ?buf:string -> string -> (t -> 'a) -> 'a
val load_sexps_conv : ?buf:string ->
       string ->
       (t -> 'a) -> [> `Error of exn * Annotated.t | `Result of 'a ] list
val load_sexps_conv_exn : ?buf:string -> string -> (t -> 'a) -> 'a list
val gen_of_string_conv : ('a -> Type.t) ->
       ('a -> Annotated.t) ->
       'a ->
       (Type.t -> 'b) -> [> `Error of exn * Annotated.t | `Result of 'b ]
val of_string_conv : string ->
       (t -> 'a) -> [> `Error of exn * Annotated.t | `Result of 'a ]
val of_bigstring_conv : bigstring ->
       (t -> 'a) -> [> `Error of exn * Annotated.t | `Result of 'a ]
module Of_string_conv_exn: sig .. end
val gen_of_string_conv_exn : ('a -> Type.t) -> 'a -> (Type.t -> 'b) -> 'b
val of_string_conv_exn : string -> (t -> 'a) -> 'a
val of_bigstring_conv_exn : bigstring -> (t -> 'a) -> 'a
val unit : t
val sexp_of_t : t -> t
val t_of_sexp : t -> t
type found = [ `Found | `Pos of int * found ] 
type search_result = [ `Found | `Not_found | `Pos of int * found ] 
val search_physical : t -> contained:t -> [ `Found | `Not_found | `Pos of int * found ]
val subst_found : t -> subst:t -> ([< `Found | `Pos of int * 'a ] as 'a) -> t