Re: [boost] Boost.RangeEx: contains?

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
http://www.boostpro.com