[Nix-dev] Re: [Nix-commits] SVN commit: nix - 12621 - eelco - in nix/trunk: src/libexpr tests/lang

[Eelco Dolstra]

Hi,

Nicolas Pierron wrote:

> On Thu, Aug 14, 2008 at 16:43, Eelco Dolstra <e.dolstra at tudelft.nl> wrote:
>> Nicolas Pierron wrote:
>>
>>>>  This saves a lot of typing (not to mention not having to update
>>>>  all-packages.nix with purely mechanical changes).  It saves as much
>>>>  typing as the "args: with args;" style, but has the advantage that
>>>>  the function arguments are properly declared (not implicit in what
>>>>  the body of the "with" uses).
>>> This was not implicit before ?
>> Sorry, I don't understand the question :-)
> 
> I mean does this following code suppose to pass before ?
> 
> ({a}: true) {a=1; b=2;}
> 
> with no ellipses.

No, this didn't/doesn't work.

 > Is there a special reason to refuse sets with extra
> attributes ?

Well, you get a bit more error checking: if you pass a useless attribute, you 
get an error.  Whether that's very helpful in practice is another matter...

-- 
Eelco Dolstra | http://www.st.ewi.tudelft.nl/~dolstra/