Error (Error)

include Info_intf.S

type t

Serialization and comparison force the lazy message.

val t_of_sexp : Sexplib.Sexp.t -> t

val sexp_of_t : t -> Sexplib.Sexp.t

val compare : t -> t -> int

val bin_t : t Bin_prot.Type_class.t

val bin_read_t : t Bin_prot.Read.reader

val __bin_read_t__ : (int -> t) Bin_prot.Read.reader

val bin_reader_t : t Bin_prot.Type_class.reader

val bin_size_t : t Bin_prot.Size.sizer

val bin_write_t : t Bin_prot.Write.writer

val bin_writer_t : t Bin_prot.Type_class.writer

include Invariant_intf.S with type t := t

type t

val invariant : t Invariant_intf.inv

val to_string_hum : t -> string

to_string_hum forces the lazy message, which might be an expensive operation.

to_string_hum usually produces a sexp; however, it is guaranteed that to_string_hum (of_string s) = s.

If this string is going to go into a log file, you may find it useful to ensure that the string is only one line long. To do this, use to_string_mach t.

val to_string_mach : t -> string

to_string_mach t outputs t as a sexp on a single-line.

val to_string_hum_deprecated : t -> string

old version (pre 109.61) of to_string_hum that some applications rely on.

Calls should be replaced with to_string_mach t, which outputs more parenthesis and backslashes.

val of_string : string -> t

val of_lazy : string Lazy.t -> t

Be careful that the body of the lazy or thunk does not access mutable data, since it will only be called at an undetermined later point.

val of_thunk : (unit -> string) -> t

val create : ?here:Source_code_position0.t -> ?strict:unit -> string -> 'a -> ('a -> Sexplib.Sexp.t) -> t

For create message a sexp_of_a, sexp_of_a a is lazily computed, when the info is converted to a sexp. So, if a is mutated in the time between the call to create and the sexp conversion, those mutations will be reflected in the sexp. Use ~strict:() to force sexp_of_a a to be computed immediately.

val create_s : Sexplib.Sexp.t -> t

val createf : ('a, unit, string, t) Pervasives.format4 -> 'a

Construct a t containing only a string from a format. This eagerly constructs the string.

val tag : t -> string -> t

Add a string to the front.

val tag_arg : t -> string -> 'a -> ('a -> Sexplib.Sexp.t) -> t

Add a string and some other data in the form of an s-expression at the front.

val of_list : ?trunc_after:int -> t list -> t

Combine multiple infos into one

val of_exn : ?backtrace:[

| `Get

| `This of string

] -> exn -> t

of_exn and to_exn are primarily used with Error, but their definitions have to be here because they refer to the underlying representation.

val to_exn : t -> exn

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

module Stable : sig .. end

val raise : t -> _

Note that the exception raised by this function maintains a reference to the t passed in.

val raise_s : Sexplib.Sexp.t -> _

val to_info : t -> Info.t

val of_info : Info.t -> t

val failwiths : ?strict:unit -> ?here:Lexing.position -> string -> 'a -> ('a -> Sexplib.Sexp.t) -> _


      failwiths ?strict ?here message a sexp_of_a
      = Error.raise (Error.create ?strict ?here s a sexp_of_a)

As with Error.create, sexp_of_a a is lazily computed, when the error is converted to a sexp. So, if a is mutated in the time between the call to failwiths and the sexp conversion, those mutations will be reflected in the error message. Use ~strict:() to force sexp_of_a a to be computed immediately.

The pa_fail preprocessor replaces failwiths with failwiths ?here:[%here] so that one does not need to (and cannot) supply [%here]. pa_fail does not add ?here:[%here] to Error.failwiths.

In this signature we write ?here:Lexing.position rather than ?here:Source_code_position.t to avoid a circular dependency.

failwithp here is like failwiths ~here, except that you can provide a source position yourself (which is only interesting if you don't provide [%here]).

val failwithp : ?strict:unit -> Lexing.position -> string -> 'a -> ('a -> Sexplib.Sexp.t) -> _

Module Error

Signature