Re: [boost] Boost Test Library: general floating point comparisons

From: Paul A Bristow (pbristow_at_[hidden])
Date: 2007-02-23 04:50:00

>-----Original Message-----
>From: boost-bounces_at_[hidden] 
>[mailto:boost-bounces_at_[hidden]] On Behalf Of Gennadiy Rozental
>Sent: 23 February 2007 02:11
>To: boost_at_[hidden]
>Subject: Re: [boost] Boost Test Library: general floating 
>point comparisons
>
>There is another alternatve:
>
>BOOST_CHECK_DIFF( a,b, PERCENT( t ) )
>BOOST_CHECK_DIFF( a,b, RELATIVE( t ) )
>BOOST_CHECK_DIFF( a,b, EPSILON( t ) )
>BOOST_CHECK_DIFF( a,b, ABSOLUTE( t ) )
>
This seems unambiguous and reads well (though I would prefer DIFFERENCE spelt out in full - nearly everyone is going to use
copy'n'paste fir this job rather than typing, so it isn't more trouble and reads better, especially for those whose 1st language
isn't english ;-)

>We could either use macro based solution
>
>BOOST_CHECK_DIFF( a,b, c ) \
>BOOST_CHECK_DIFF_IMPL( a,b, BOOST_CHECK_DIFF_TOL_ # c )
>
>or function overloading based. But it could be less convinient 
>even if a bit safer (from macro redefinitions)

Safely seems less (even un-) important for Unit Testing.

Paul

---
Paul A Bristow
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