[Development] Adding support for version number comparisons

Stephen Kelly stephen.kelly at kdab.com
Wed May 14 14:12:40 CEST 2014

On Sunday, May 11, 2014 13:42:25 Keith Gardner wrote:
> Other comparison rules:
>    1. Numerical groupings should be compared integers instead of characters
>    in order to properly allow for "alpha2" < "alpha11".
>    2. Delimiters should only be used to denote groups of content but be
>    skipped during the compare.  "alpha" == "-alpha" == "~alpha" == ".alpha"
>    1. Can be restricted to the first character if this is too broad.

Given that we're numbering things, your last point would probably be better-
numbered 3 instead of 1 again, right?

Note also that version number schemes for particular software are not constant 
over time.


Are Windows versions in scope?

I changed grantlee versions to drop a 'v' at some point.


I'm sure there are other examples in the past and in the future. I didn't read 
closely enough to see if that affects your proposal at all.

My bikeshed color is that a version comparator should only do 'component-wise 
numeric comparison' and shouldn't also try to handle prefixes and suffixes 
etc. I'm just adding that because I don't really support any side of this 
discussion beyond bikeshedding.


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