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

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)

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

Initialisation value: 2.

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

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

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

Same as pp_mach.

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

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

Same as to_string_mach.