[Nix-dev] [PATCH] t/allow-arbitrary-strinsg-in-names

[Marc Weber]

Excerpts from Eelco Dolstra's message of Tue Jul 13 10:32:41 +0200 2010:
> Hi,
> 
> On 07/13/2010 12:58 AM, Marc Weber wrote:
> 
> > allow strings as names in attribute sets:
> 
> For consistency, shouldn't they also be allowed in attribute selection?  I.e.,
> 
>   as."git-1.8"
> 

Sorry for posting a wrong example. The test case was correct
The overhead using getAttr is not as big as using listToAttrs. I mostly
thought of imitating switch/case like statements using attribute sets in Nix..

let sources = {
  "1" = fetchurl
  "2" = fetchurl 
}; in


stdenv.mkDerivation {
  name = "xxxx";
  src = stdenv.lib.maybeAttr version (throw "no source given") sources;
}


I'm fine with posting a second patch allowing as."git-1.8"

Eelco Dolstra, can you also comment the dynamic_cast usage?
Another type could be added which is passed from the lexer to the
parser. Then it would not be necessary. static_cast would be an option
because changes are likely to be cought by the test suite..

Marc Weber