QCaml/common/charge.org

• Charge
  • Type
  • Conversions
    • of_float / to_float
    • of_int / to_int
    • of_string / to_string
  • Simple operations
  • Printers

(org-babel-tangle)

Charge

Type

This type should be used for all charges in the program (electrons, nuclei,…).

type t

type t = float

Conversions

of_float / to_float

val of_float : float -> t
val to_float : t -> float

external of_float : float -> t = "%identity"
external to_float : t -> float = "%identity"

of_int / to_int

val of_int   : int -> t
val to_int   : t -> int

let of_int = float_of_int
let to_int = int_of_float

of_string / to_string

val of_string: string -> t
val to_string: t -> string

let of_string = float_of_string 

let to_string x = 
if x >  0. then
Printf.sprintf "+%f" x
else if x < 0. then
Printf.sprintf "%f" x
else 
"0.0"

Simple operations

val ( + ) : t -> t -> t
val ( - ) : t -> t -> t
val ( * ) : t -> float -> t
val ( / ) : t -> float -> t

let gen_op op =
fun a b ->
op (to_float a) (to_float b)
|> of_float

let ( + ) = gen_op ( +. )
let ( - ) = gen_op ( -. )
let ( * ) = gen_op ( *. )
let ( / ) = gen_op ( /. )

Printers

val pp : Format.formatter -> t -> unit

let pp ppf x = 
Format.fprintf ppf "@[+%s@]" (to_string x)