Joseph Rushton Wakeling:
How does your desired concept relate to the existing
std.algorithm.nextPermutation ... ?
The API of the lazy permutations/combinations ranges is similar
to the one I have written here:
http://rosettacode.org/wiki/Permutations#Fast_Lazy_Version
That is also very similar to the permutations/combinations here
(with the "r" optional argument):
http://docs.python.org/2/library/itertools.html
To the one in Phobos is used like:
auto items = [1, 2, 3];
do
writeln(items);
while (items.nextPermutation());
The permutations/combinations range is used like (the boolean
template argument is to specify if it has to copy the buffer or
not):
[1, 2, 3].permutations!false.writeln;
Bye,
bearophile
