basic method application: avoid Position.setmp_thread_data_seq, which destroys transaction context;
Method.Basic: no position;
structure Report =
struct
local
val report_depth = ref 0
fun space n = if n <= 0 then "" else (space (n-1))^" "
fun report_space () = space (!report_depth)
in
fun timeit f =
let
val t1 = start_timing ()
val x = f ()
val t2 = #message (end_timing t1)
val _ = writeln ((report_space ()) ^ "--> "^t2)
in
x
end
fun report s f =
let
val _ = writeln ((report_space ())^s)
val _ = report_depth := !report_depth + 1
val x = timeit f
val _ = report_depth := !report_depth - 1
in
x
end
end
end