Re: [Boost-users] [STL] Is there a std::abs<>() function? (Max)

Subject: Re: [Boost-users] [STL] Is there a std::abs<>() function? (Max)
From: Deane Yang (deane.yang_at_[hidden])
Date: 2008-12-25 05:09:26

I just made up my own naive version. Improvements would be welcome:

     template<typename T>
     inline
     T AbsoluteValue(const T& x)
     {
       if (x < T(0))
       {
         return -x;
       }
       else
       {
         return x;
       }
     }

Max wrote:
> seconded.
> 
> But could you tell me where I can find the temple version of 
> AbsoluteValue function you mentioned?
> 
> Thanks
> B/Rgds
> Max
> 
> ----- Original Message -----
> From: Deane Yang 
> To: boost-users_at_[hidden]
> Subject: Re: [Boost-users] [STL] Is there a std::abs<>() function? (Max)
> Date: 2008-12-23 23:28:08
> 
> Scott McMurray wrote:
> 
>> On Mon, Dec 22, 2008 at 21:06, Max  wrote:
> 
>>> What I need is a template version of abs, not the
> 
>>> int abs(int) function, to make use of it genericly.
> 
> 
> 
>> Do you really need a template of it?  I can't see why using ADL
> 
>> wouldn't be enough (with a using declaration for std::abs, to catch
> 
>> the overloads for scalars from  and ).
> 
> 
> 
> 
> 
> I certainly use template versions of Max, Min, and AbsoluteValue, 
> 
> because I need them for user-defined classes (that represent real 
> 
> numbers) and not just for built-in types.
> 
> 
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