scanf %n may return 1 too much?

[Hendrik Tews <tews@tcs.inf.tu-dresden.de>]

Dear all,

is the following really the intented behaviour?

# Scanf.sscanf " a" " %n" (fun n -> n);;
- : int = 2
# Scanf.sscanf " a" " a%n" (fun n -> n);;
- : int = 2

In the first one only one character is consumed, it should IMO
return 1. The second one consumes one character more than the
first one. So it should return one more than the first one.

How can I scan _precisely_ one space without the look ahead
behavior that the format " " apparently has? I guessed "% ", but
that raises an exception.

Bye,

Hendrik