ocaml/stdlib/printexc.mli

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(* A catch-all exception handler *)
val catch: ('a -> 'b) -> 'a -> 'b
(* [Printexc.catch fn x] applies [fn] to [x] and returns the result.
If the evaluation of [fn x] raises any exception, the
name of the exception is printed on standard error output,
and the programs aborts with exit code 2.
Typical use is [Printexc.catch main ()], where [main], with type
[unit->unit], is the entry point of a standalone program, to catch
and print stray exceptions. *)
val print: ('a -> 'b) -> 'a -> 'b
(* Same as [catch], but re-raise the stray exception after
printing it, instead of aborting the program. *)