Re: [boost] Boost.Algorithm design question

Subject: Re: [boost] Boost.Algorithm design question
From: Vicente Botet (vicente.botet_at_[hidden])
Date: 2011-10-06 07:29:58

Marshall Clow-2 wrote:
> 
> So, what do people prefer (and why?):
> 
> template<typename InputIterator, typename V> 
> bool none_of_equal ( InputIterator first, InputIterator last, V const &val
> ) 
> {
>     for ( ; first != last; ++first )
>         if ( val == *first )
>             return false;
>     return true; 
> } 
> 
> or
> 
> template<typename InputIterator, > 
> bool none_of_equal ( InputIterator first, InputIterator last,
> iterator_traits<InputIterator>::value_type const &val ) 
> {
>     for ( ; first != last; ++first )
>         if ( val == *first )
>             return false;
>     return true; 
> } 
> 
> In the first case, I think there's (possible) conversion from V to
> iterator_traits<InputIterator>::value_type each time through the loop.
> In the second case, there is not.
> 
> 

Couldn't you provide both using SFINAE?

Best,
Vicente

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