Re: [boost] questions about boost multiprecision

Subject: Re: [boost] questions about boost multiprecision
From: Steven Watanabe (watanabesj_at_[hidden])
Date: 2019-03-21 23:00:15

AMDG

On 3/21/19 4:44 PM, Robert Ramey via Boost wrote:
> I'm looking more carefully at Boost Multiprecision than I have in the
> past and have a couple of questions:
> 
> It's not clear to me how errors are handled.  For example, what happens
> in a divide by zero?

std::overflow_error.  This is documented for the
individual backends.

>Â  Or what happens when a result overflows.

It depends on the specific type.  cpp_int describes
what it does here:
https://www.boost.org/libs/multiprecision/doc/html/boost_multiprecision/tut/ints/cpp_int.html

> I'm aware
> that this will likely vary depending on whether the arguments are
> arbitrary precision made a runtime or a precision fixed at compile time.
> Â In any case, looking through the manual I can't find this information.
> Â Of course this package is so ambitious, that it's possible that I've
> missed it but in that case a pointer would be appreciated.
> 
> Spending some time on this makes me appreciate what an incredibly
> ambitious accomplishment this is.  It's really unbelievable.  I would be
> curious how frequently various parts of the package are used.
> 

In Christ,
Steven Watanabe