Re: [boost] [Algorithm] contains(v, 1)

Subject: Re: [boost] [Algorithm] contains(v, 1)
From: Robert Ramey (ramey_at_[hidden])
Date: 2018-05-31 14:48:24

On 5/31/18 5:58 AM, Olaf van der Spek via Boost wrote:
> On Thu, May 31, 2018 at 2:50 PM, Robert Ramey via Boost
> <boost_at_[hidden]> wrote:
>> On 5/31/18 3:14 AM, Olaf van der Spek via Boost wrote:
>>>
>>> Hi,
>>>
>>> vector<int> v;
>>> contains(v, 1);
>>>
>>> This doesn't work as contains expects two ranges (AFAIK).
>>> Is there some other function that's usable for this purpose?
>>> Should contains support a value for argument 2?
>>>
>>> Gr,
>>>
>>
>> Hmmm- can't you just make your own?  Something like ...
>>
>> #include <algorithm>
>>
>> template<typename V>
>> bool contains(const V & v, const typename V::value_type & t){
>>          return v.end != find(v.begin(), v.end(), t);
>> }
>>
>> I'm pretty sure it would work on strings as well.
> 
> Of course I could, but I'd rather not..

Why not?  This is a sincere question.  If libraries contain lots of 
stuff like this, it makes the libraries harder to understand.  I prefer 
a set of simple, transparent tools which are easily composed.  I see we 
disagree on this, I'm curious what your argument is.

Robert Ramey