Module Std_kernel.Error

module Error: Error

include Info

val raise : t -> 'a

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

failwiths message value sexp_of_value raises an exception with the supplied message and value, by constructing an Error.t and using Error.raise. As usual, the sexp_of_value is only applied when the value is converted to a sexp or a string. So, if you mutate value in between the time you call failwiths and the time the error is displayed, those mutations will be reflected in the error message.

failwiths s a f = Error.raise (Error.create s a f)

failwithp _here_ s a f is just failwiths with the source code position tagged on. We use Lexing.position rather than Source_code_position.t to avoid a circular dependency.

val failwithp : Lexing.position -> string -> 'a -> ('a -> Sexplib.Sexp.t) -> 'b