Subject: Re: [boost] [chrono] type_traits/common_type and integer/ratio
From: Vicente Botet Escriba (vicente.botet_at_[hidden])
Date: 2009-12-02 22:17:34
John Maddock wrote:
>> You can see [http://www.open-std.org/jtc1/sc22/wg21 [*N2661 - A
>> to Sleep On]] which is very informative and provides motivation for key
>> design decisions for `common_type`, ratio and chrono.
>> I really think they are very useful and the standard group also, as both
>> in N3000.
> OK, looking into that a bit more, I think that would be a reasonably
> uncontrovercial addition to type_traits - but do you have a test suite and
I'm reworking the Beman documentation using quickbook. I'll add it to the
vault as soon as possible. Concerning tests, currently there is much more
examples using chrono and ratio than common_type. You can take a look at the
Beman version on the Sandbox.
I hope you could adopt this utility.
> This one's quite a bit of an addition - almost a little mini-library in
> own right.
> I think you're correct that it should be locatable as a utility in it's
> right, and yes under boost/integer I guess. My suggestion is that you ask
> for a review for ratio separately from chrono. BTW the utilities here
> be useful for the implementation of this one, rather than re-inventing
Ok, I'm going to separate the comom_type, the ratio and the chono
documentation and test to make eaisier separated reviews.
Thanks for the pointer. I'll see how math/gdc can be used to refactor the
use of gdc in the class ratio.
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