On Thu, Aug 14, 2008 at 16:00, Eelco Dolstra <[EMAIL PROTECTED]> wrote:
> Log:
> * Added an experimental feature suggested by Andres: ellipses ("...")
> in attribute set pattern matches. This allows defining a function
> that takes *at least* the listed attributes, while ignoring
> additional attributes. For instance,
>
> {stdenv, fetchurl, fuse, ...}:
>
> stdenv.mkDerivation {
> ...
> };
>
> defines a function that requires an attribute set that contains the
> specified attributes but ignores others. The main advantage is that
> we can then write in all-packages.nix
>
> aefs = import ../bla/aefs pkgs;
>
> instead of
>
> aefs = import ../bla/aefs {
> inherit stdenv fetchurl fuse;
> };
>
> 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 ?
--
Nicolas Pierron
- If you are doing something twice then you should try to do it once.
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