On 10 February 2005 22:29, Peter Simons wrote:
> Simon Marlow writes:
>
> > The general syntax of package ids is:
>
> > pkgid ::= pkg ('-' version)?
> > pkg ::= (alphanum|'-')+
> > version ::= (digit+) ('.' digit+)* ('-' alphanum+)*
>
> Thanks. I gave my package the version "hsdns-0.0-2005-02-10"
> and that fixed the problem.
You should be aware that the version tags (i.e. -2005-02-10) are ignored
by Cabal when determining whether dependencies are satisfied. That is,
the ordering on versions ignores the tags.
> > Perhaps we should change the syntax of package ids
> > though?
>
> In my humble opinion, GHC shouldn't try to guess what
> version identifiers mean; I would treat them as a literal
> strings without any parsing. But that's probably just me.
Mostly they are ignored, only parsed. Cabal is the only part of the
systen that actually imposes a meaning, in terms of an ordering, on
versions.
Cheers,
Simon
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