Re: [boost] [math] potentian bug: iround throws, given double( numeric_limits<int>::min() )

Subject: Re: [boost] [math] potentian bug: iround throws, given double( numeric_limits<int>::min() )
From: John Maddock (boost.regex_at_[hidden])
Date: 2011-10-21 04:39:13

>> I thought that was only for checking range. Or do you mean round(), and
>> then numeric_cast<>() instead of checking range manually in 
>> round_cast<>()?
>>
>>
> Ah, that can be customized with a policy, but the only rounding (not
> Floor/Ceil/Trunc) policy provided is RoundEven which doesn't do exactly 
> what
> I want, while math::round does ;)
>
> Besides, with math::round() I can use the same policy I use for other math
> functions.

Nod.

I guess the functions could something like:

template <class R, class T>
R round_to(const T&);

template <class R, class T>
R trunc_to(const T&);

which would provide generic versions of iround/itrunc (although R need not 
be an integer type, as long as there's a static_cast from T to R).

I'm not particularly sold on those names though, I guess 
"round_cast/trunc_cast" would be an alternative.

John.