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Subject: Re: [boost] Boost.RangeEx: contains?
From: Eric Niebler (eric_at_[hidden])
Date: 2009-02-22 14:55:00

Mathias Gaunard wrote:
> Marcus Lindblom wrote:
>> I'm just missing basic "contains/contains_if" function, that searches
>> and retursn a bool on whether an item is in a range. (i.e. find(rng,
>> v) != end(rng) ). I've found those are quite useful. Perhaps this just
>> has another name and I overlooked it?
> What about !empty(rng | filtered(_1 == v)).

Sure, and most algorithms can be implemented in terms of fold. It
doesn't follow that fold should be the only algorithm. I don't like
requiring users to use range adaptors instead of providing algorithms
like "find_if" and "contains" that just do what they say.

Eric Niebler
BoostPro Computing

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