Module Base__.Int_conversions

Conversions between various integer types

val int_to_int32 : int ‑> int32 option

Ocaml has the following integer types, with the following bit widths on 32-bit and 64-bit architectures.

                            arch  arch
                type        32b   64b
                ----------------------
                int          31    63  (32 when compiled to JavaScript)
                nativeint    32    64
                int32        32    32
                int64        64    64

In both cases, the following inequalities hold:


      width(int) < width(nativeint)
      && width(int32) <= width(nativeint) <= width(int64)

The conversion functions come in one of two flavors.

If width(foo) <= width(bar) on both 32-bit and 64-bit architectures, then we have

 val foo_to_bar : foo -> bar

otherwise we have


      val foo_to_bar     : foo -> bar option
      val foo_to_bar_exn : foo -> bar
val int_to_int32_exn : int ‑> int32
val int_to_int64 : int ‑> int64
val int_to_nativeint : int ‑> nativeint
val int32_to_int : int32 ‑> int option
val int32_to_int_exn : int32 ‑> int
val int32_to_int64 : int32 ‑> int64
val int32_to_nativeint : int32 ‑> nativeint
val int64_to_int : int64 ‑> int option
val int64_to_int_exn : int64 ‑> int
val int64_to_int32 : int64 ‑> int32 option
val int64_to_int32_exn : int64 ‑> int32
val int64_to_nativeint : int64 ‑> nativeint option
val int64_to_nativeint_exn : int64 ‑> nativeint
val int64_fit_on_int63_exn : int64 ‑> unit
val nativeint_to_int : nativeint ‑> int option
val nativeint_to_int_exn : nativeint ‑> int
val nativeint_to_int32 : nativeint ‑> int32 option
val nativeint_to_int32_exn : nativeint ‑> int32
val nativeint_to_int64 : nativeint ‑> int64
val num_bits_int : int
val num_bits_int32 : int
val num_bits_int64 : int
val num_bits_nativeint : int
module Make : functor (I : sig ... end) -> sig ... end

human-friendly string (and possibly sexp) conversions

module Make_hex : functor (I : sig ... end) -> Base.Int_intf.Hexable with type t := I.t

in the output, to_string, of_string, sexp_of_t, and t_of_sexp convert between t and signed hexadecimal with an optional "0x" or "0X" prefix.

val sexp_of_int_style : [ `No_underscores | `Underscores ] Base__.Import.ref

global ref affecting whether the sexp_of_t returned by Make is consistent with the to_string input or the to_string_hum output

val insert_delimiter_every : string ‑> delimiter:char ‑> chars_per_delimiter:int ‑> string

utility for defining to_string_hum on numeric types -- takes a string matching (-|+)?0-9a-fA-F+ and puts delimiter every chars_per_delimiter characters starting from the right.

val insert_delimiter : string ‑> delimiter:char ‑> string

insert_delimiter_every ~chars_per_delimiter:3

val insert_underscores : string ‑> string

insert_delimiter ~delimiter:'_'