Kxclib.Direct_io
type 'x t = ('x, exn * Backtrace_info.t) Stdlib.result
val return : 'x -> 'x t
val inject_error' : (exn * backtrace_info option) -> 'x t
val inject_error : exn -> 'x t
val extract_error : 'x t -> ('x, exn * backtrace_info option) Stdlib.result t