package ppx_sexp_conv

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[@@deriving] plugin to generate S-expression conversion functions

Install 

dune-project
 Dependency

github.com Changelog MIT License Edit opam file Versions (11)

Authors

  1. J
    Jane Street Group, LLC

Maintainers

  1. J
    Jane Street developers

Sources

ppx_sexp_conv-v0.15.0.tar.gz
sha256=d9cd1eefa179acedb8954ba95ed01e8fd685dae6e278061936ce5930d95a8380

doc/ppx_sexp_conv.runtime-lib/Ppx_sexp_conv_lib/Sexp/index.html

Module Ppx_sexp_conv_lib.Sexp

include module type of struct include Sexplib0.Sexp end
type t = Sexplib0.Sexp.t =
  1. | Atom of string
  2. | List of t list
val t_of_sexp : t -> t
val sexp_of_t : t -> t
val equal : t -> t -> bool
val compare : t -> t -> int
exception Not_found_s of t

Not_found_s is used by functions that historically raised Not_found, to allow them to raise an exception that contains an informative error message (as a sexp), while still having an exception that can be distinguished from other exceptions.

exception Of_sexp_error of exn * t

Of_sexp_error (exn, sexp) the exception raised when an S-expression could not be successfully converted to an OCaml-value.

Helpers

val message : string -> (string * t) list -> t

Helper to build nice s-expressions for error messages. It imitates the behavior of [%message ...] from the ppx_sexp_message rewriter.

message name key_values produces a s-expression list starting with atom name and followed by list of size 2 of the form (key value). When the key is the empty string, value is used directly instead as for [%message].

For instance the following code:

  Sexp.message "error"
    [ "x", sexp_of_int 42
    ; "" , sexp_of_exn Exit
    ]

produces the s-expression:

  (error (x 42) Exit)

Defaults

val default_indent : int ref

default_indent reference to default indentation level for human-readable conversions.

Initialisation value: 2.

Pretty printing of S-expressions

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

pp_hum ppf sexp outputs S-expression sexp to formatter ppf in human readable form.

val pp_hum_indent : int -> Format.formatter -> t -> unit

pp_hum_indent n ppf sexp outputs S-expression sexp to formatter ppf in human readable form and indentation level n.

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

pp_mach ppf sexp outputs S-expression sexp to formatter ppf in machine readable (i.e. most compact) form.

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

Same as pp_mach.

Conversion to strings

val to_string_hum : ?indent:int -> t -> string

to_string_hum ?indent sexp converts S-expression sexp to a string in human readable form with indentation level indent.

  • parameter indent

    default = !default_indent

val to_string_mach : t -> string

to_string_mach sexp converts S-expression sexp to a string in machine readable (i.e. most compact) form.

val to_string : t -> string

Same as to_string_mach.

Styles

val of_float_style : [ `Underscores | `No_underscores ] ref
val of_int_style : [ `Underscores | `No_underscores ] ref
module Private = Sexplib0.Sexp.Private