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lix/tests/lang/eval-okay-delayed-with-inherit.nix
Shea Levy afc6c1bad6 Simplify inherited attribute handling
This reduces the difference between inherited and non-inherited
attribute handling to the choice of which env to use (in recs and lets)
by setting the AttrDef::e to a new ExprVar in the parser rather than
carrying a separate AttrDef::v VarRef member.

As an added bonus, this allows inherited attributes that inherit from a
with to delay forcing evaluation of the with's attributes.

Signed-off-by: Shea Levy <shea@shealevy.com>
2013-08-26 11:31:56 +02:00

25 lines
466 B
Nix

let
pkgs_ = with pkgs; {
a = derivation {
name = "a";
system = builtins.currentSystem;
builder = "/bin/sh";
args = [ "-c" "touch $out" ];
inherit b;
};
inherit b;
};
packageOverrides = p: {
b = derivation {
name = "b-overridden";
system = builtins.currentSystem;
builder = "/bin/sh";
args = [ "-c" "touch $out" ];
};
};
pkgs = pkgs_ // (packageOverrides pkgs_);
in pkgs.a.b.name