Module Printexc

structure Printexc = struct ... end 

Facilities for printing exceptions.

val to_string : exn -> string

Printexc.to_string e returns a string representation of the exception e.

val print : ('a -> 'b) -> 'a -> 'b

Printexc.print 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 exception is raised again. The typical use is to catch and report exceptions that escape a function application.

val catch : ('a -> 'b) -> 'a -> 'b

Printexc.catch fn x is similar to Printexc.print, but aborts the program with exit code 2 after printing the uncaught exception. This function is deprecated: the runtime system is now able to print uncaught exceptions as precisely as Printexc.catch does. Moreover, calling Printexc.catch makes it harder to track the location of the exception using the debugger or the stack backtrace facility. So, do not use Printexc.catch in new code.