[metapost] Bug with simple number comparisons with new number systems

[luigi scarso]

On Tue, Jul 28, 2015 at 9:21 AM, Toby Thurston <thurston at eml.cc> wrote:

> I'm getting strange results comparing numbers with the new number systems.
>
> Consider this program:
>
>     show 0.0001 < 0.001, numbersystem, mpversion; end.
>
> With the default number system this gives
>
> >> true
> >> "scaled"
> >> "1.999" )
>
> on my log. But with the other number systems I get:
>
> >> true
> >> "double"
> >> "1.999" )
>
> >> false
> >> "binary"
> >> "1.999" )
>
> >> false
> >> "decimal"
> >> "1.999" )
>
> which is a bit unexpected...
>
> I'm using a version I compiled myself from source after you fixed the
> normaldeviate bug a couple of months ago.
> Testing with V1.902, the only other version I have on hand, I only get the
> error with "decimal". But it does not appear to matter what numbers I use.
> I get the same results  with "1<2", or "1/4<1/2", etc
>
> This is MetaPost, version 1.902 (TeX Live 2014) (kpathsea version 6.2.0)
> >> true
> >> "scaled" )
> This is MetaPost, version 1.902 (TeX Live 2014) (kpathsea version 6.2.0)
> >> true
> >> "double" )
> This is MetaPost, version 1.902 (TeX Live 2014) (kpathsea version 6.2.0)
> >> true
> >> "binary" )
> This is MetaPost, version 1.902 (TeX Live 2014) (kpathsea version 6.2.0)
> >> false
> >> "decimal" )
>
> I've posted an entry on the tracker.  Toby
> --
> http://tug.org/metapost/
>



Thank you for the report, I will investigate soon.

-- 
luigi
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