module StdOpt: sig .. end
This module contains various standard options.
Flag options
val store_const : ?default:'a -> 'a -> 'a OptParse.Opt.t
store_const ?default const returns a flag option which
stores the constant value const when the option is
encountered on the command line.
val store_true : unit -> bool OptParse.Opt.t
store_true () returns an option which is set to true when
it is encountered on the command line. The default value is
false.
val store_false : unit -> bool OptParse.Opt.t
store_false () returns an option which is set to false when
it is encountered on the command line. The default value is
true.
val count_option : ?dest:int Pervasives.ref -> ?increment:int -> unit -> int OptParse.Opt.t
Create a counting option which increments its value each time the
option is encountered on the command line.
Returns the newly created option.
dest : Reference to the option value. Useful for making
options like '--quiet' and '--verbose' sharing a single value.
increment : Increment to add to the option value each
time the option is encountered.
val incr_option : ?dest:int Pervasives.ref -> unit -> int OptParse.Opt.t
Exactly identical to count_option ~dest:dest ~increment:1 ().
val decr_option : ?dest:int Pervasives.ref -> unit -> int OptParse.Opt.t
Exactly identical to count_option ~dest:dest ~increment:(-1) ().
Value options
val int_option : ?default:int -> ?metavar:string -> unit -> int OptParse.Opt.t
int_option ?default ?metavar () returns an option which takes
a single integer argument. If ~default is given it is the
default value returned when the option has not been encountered
on the command line.
val float_option : ?default:float -> ?metavar:string -> unit -> float OptParse.Opt.t
val str_option : ?default:string -> ?metavar:string -> unit -> string OptParse.Opt.t
Callback options
val int_callback : ?metavar:string -> (int -> unit) -> unit OptParse.Opt.t
int_callback ?metavar f returns an option which takes a single
integer argument and calls f with that argument when encountered
on the command line.
val float_callback : ?metavar:string -> (float -> unit) -> unit OptParse.Opt.t
val str_callback : ?metavar:string -> (string -> unit) -> unit OptParse.Opt.t
Special options
val help_option : unit -> 'a OptParse.Opt.t
help_option () returns the standard help option which
displays a usage message and exits the program when encountered
on the command line.
val version_option : (unit -> string) -> 'a OptParse.Opt.t
version_option f returns the standard version option which
displays the string returned by f () (and nothing else) on
standard output and exits.