diff options
| author | Eelco Dolstra <e.dolstra@tudelft.nl> | 2008-08-14T14·00+0000 |
|---|---|---|
| committer | Eelco Dolstra <e.dolstra@tudelft.nl> | 2008-08-14T14·00+0000 |
| commit | 9279174dde3e1a450e63e866d2683352dd8238d3 (patch) | |
| tree | 05b5b835f143b97d150a37873641fb5d5e9a7075 /tests/lang/parse-okay-1.exp | |
| parent | db4f4a842515392a6b40f5c86b2ef885c1278451 (diff) | |
* 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).
Diffstat (limited to 'tests/lang/parse-okay-1.exp')
| -rw-r--r-- | tests/lang/parse-okay-1.exp | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/tests/lang/parse-okay-1.exp b/tests/lang/parse-okay-1.exp index 112f5e1f6fa1..bb8746ec45a6 100644 --- a/tests/lang/parse-okay-1.exp +++ b/tests/lang/parse-okay-1.exp @@ -1 +1 @@ -Function(AttrsPat([Formal("x",NoDefaultValue),Formal("y",NoDefaultValue),Formal("z",NoDefaultValue)]),OpPlus(OpPlus(Var("x"),Var("y")),Var("z")),NoPos) +Function(AttrsPat([Formal("x",NoDefaultValue),Formal("y",NoDefaultValue),Formal("z",NoDefaultValue)],Bool(False)),OpPlus(OpPlus(Var("x"),Var("y")),Var("z")),NoPos) |