findSkip signature

[Andrei Alexandrescu]

I just added a useful function to Phobos: findSkip. Refer to

http://d-programming-language.org/cutting-edge/phobos/std_algorithm.html#findSkip

and

http://www.dsource.org/projects/phobos/changeset/2339

I'm unsure about the signature. Currently the function returns 
Tuple!(R1, "balance", bool, "found"), i.e. the balance of the range 
being searched and a Boolean telling whether or not the other range was 
found. The Boolean is necessary because returning an empty range is 
ambiguous - did you find the needle at the very end of the haystack, or 
not at all?

I think a signature that's easier to use is:

bool findSkip(alias pred = "a == b", R1, R2)(ref R1 haystack, R2 needle);

i.e. the haystack is passed by reference and modified if the find was 
successful. This is in keep with skipOver's signature, but not in keep 
with find's signature.

Opinions?


Andrei