Reading whitespace separated strings from stdin?

[TheGag96 via Digitalmars-d-learn]

Hi guys! I had this homework assignment for data structures that 
has a pretty easy solution in C++. Reading input like this...

1 2 3 # $
4 3 * ! #
20 3 / # $ #
62 # $
2 3 8 * + #
4 48 4 2 + / #
SUM # $
1 2 3 4 5 #
R #
@
...where "@" denotes the end of input is fairly simple in C++:

string token = "";
while (token != "@") {
  //handle input
}

Note that having newlines doesn't matter at all; every token is 
just assumed to be separated by "whitespace". However in D, I 
looked around could not find a solution better than this:

foreach (line; stdin.byLine) {
  foreach (token; line.split) {
    //handle input
  }
}

Is there any way to do this without two loops/creating an array? 
"readf(" %d", &token);" wasn't cutting it either.

Thanks.