Summary: Replace walkLength() with an improved count()
--- Comment #0 from bearophile_h...@eml.cc 2012-07-30 09:08:02 PDT ---
This is related to the refused enhancement in Issue 8467
Given that issue 8467 says that the "pred" template argument of
std.algorithm.count() can't be changed, then I suggest:
1) To introduce an optimization inside std.algorithm.count(): if the "pred"
template argument was not changed by the programmer (so it's equal to "true"),
and the given range defines a length, then to return that length value.
2) To deprecate std_range.walkLength() because now its purposes are replaced by
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