The Options module

type 'a option_class

The abstract type for a class of options. A class is a set of options which use the same conversion functions from loading and saving.

type 'a option_record

The abstract type for an option

Operations on option files

val filename : string ref

The name of the option file.

val load : unit -> unit

load () loads the option file. All options whose value is specified in the option file are updated.

val append : string -> unit

append filename loads the specified option file. All options whose value is specified in this file are updated.

val save : unit -> unit

save () saves all the options values to the option file.

val save_with_help : unit -> unit

save_with_help () saves all the options values to the option file, with the help provided for each option.

Creating options

val define_option :
  string list ->  string -> 'a option_class -> 'a -> 'a option_record

val option_hook : 'a option_record -> (unit -> unit) -> unit
    

val string_option : string option_class

val color_option : string option_class

val font_option : string option_class

val int_option : int option_class

val bool_option : bool option_class

val float_option : float option_class

val path_option : string list option_class

val string2_option : (string * string) option_class

val filename_option : string option_class

parameterized options

val list_option : 'a option_class -> 'a list option_class

val smalllist_option : 'a option_class -> 'a list option_class

val sum_option : (string * 'a) list -> 'a option_class

val tuple2_option :  
  'a option_class * 'b option_class -> ('a * 'b) option_class

val tuple3_option : 'a option_class * 'b option_class * 'c option_class ->
  ('a * 'b * 'c) option_class

Using options

val ( !! ) : 'a option_record -> 'a

val ( =:= ) : 'a option_record -> 'a -> unit

val shortname : 'a option_record -> string

val get_help : 'a option_record -> string  

Creating new option classes

val get_class : 'a option_record -> 'a option_class

val class_hook : 'a option_class -> ('a option_record -> unit) -> unit

type option_value =
  Module of option_module
| Value of  string
| List of option_value list
| SmallList of option_value list
  

and option_module =
  (string * option_value) list

val define_option_class :
  string -> (option_value -> 'a) -> ('a -> option_value) -> 'a option_class

val to_value : 'a option_class -> 'a -> option_value

val from_value : 'a option_class -> option_value -> 'a
  

val value_to_string : option_value -> string

val string_to_value : string -> option_value

val value_to_int : option_value -> int

val int_to_value : int -> option_value

val bool_of_string : string -> bool

val value_to_bool : option_value -> bool

val bool_to_value : bool -> option_value

val value_to_float : option_value -> float

val float_to_value : float -> option_value

val value_to_string2 : option_value -> string * string

val string2_to_value : string * string -> option_value

val value_to_list : (option_value -> 'a) -> option_value -> 'a list

val list_to_value : ('a -> option_value) -> 'a list -> option_value

val smalllist_to_value : ('a -> option_value) -> 'a list -> option_value

val value_to_path : option_value -> string list

val path_to_value : string list -> option_value

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