`val stdlib_input_line : Stdlib.in_channel -> string`
`include module type of struct include Stdlib.In_channel end`
`type t = Stdlib.in_channel`
`type open_flag = Stdlib.open_flag =`

1. `| Open_rdonly`
2. `| Open_wronly`
3. `| Open_append`
4. `| Open_creat`
5. `| Open_trunc`
6. `| Open_excl`
7. `| Open_binary`
8. `| Open_text`
9. `| Open_nonblock`

`val stdin : t`
`val open_bin : string -> t`
`val open_text : string -> t`
`val open_gen : open_flag list -> int -> string -> t`
`val with_open_bin : string -> (t -> 'a) -> 'a`
`val with_open_text : string -> (t -> 'a) -> 'a`
`val with_open_gen : open_flag list -> int -> string -> (t -> 'a) -> 'a`
`val close : t -> unit`
`val close_noerr : t -> unit`
`val input_char : t -> char option`
`val input_byte : t -> int option`
`val input_line : t -> string option`
`val really_input_string : t -> int -> string option`
`val input_all : t -> string`
`val input_lines : t -> string list`
`val input : t -> bytes -> int -> int -> int`
`val input_bigarray : t -> ('a, Stdlib.Bigarray.int8_unsigned_elt, Stdlib.Bigarray.c_layout) Stdlib.Bigarray.Array1.t -> int -> int -> int`
`val really_input : t -> bytes -> int -> int -> unit option`
`val really_input_bigarray : t -> ('a, Stdlib.Bigarray.int8_unsigned_elt, Stdlib.Bigarray.c_layout) Stdlib.Bigarray.Array1.t -> int -> int -> unit option`
`val fold_lines : ('acc -> string -> 'acc) -> 'acc -> t -> 'acc`
`val seek : t -> int64 -> unit`
`val pos : t -> int64`
`val length : t -> int64`
`val set_binary_mode : t -> bool -> unit`
`val is_binary_mode : t -> bool`
`val isatty : t -> bool`
`val input_line_exn : Stdlib.in_channel -> string`