about summary refs log tree commit diff
path: root/src/libexpr/nixexpr-ast.def
diff options
context:
space:
mode:
authorEelco Dolstra <e.dolstra@tudelft.nl>2008-08-14T16·59+0000
committerEelco Dolstra <e.dolstra@tudelft.nl>2008-08-14T16·59+0000
commitca07f3e37015fa85fbfc5afd868249d457e649c9 (patch)
tree9cc9408d37f9410952a0faf44b1b0f14236a9ae2 /src/libexpr/nixexpr-ast.def
parent9279174dde3e1a450e63e866d2683352dd8238d3 (diff)
* Another experimental feature: a way to truly override attributes in
  a rec.  This will be very useful to allow end-user customisation of
  all-packages.nix, for instance globally overriding GCC or some other
  dependency.  The // operator doesn't cut it: you could replace the
  "gcc" attribute, but all other attributes would continue to
  reference the original value due to the substitution semantics of
  rec.

  The syntax is a bit hacky but this is to allow backwards
  compatibility.

Diffstat (limited to 'src/libexpr/nixexpr-ast.def')
-rw-r--r--src/libexpr/nixexpr-ast.def1
1 files changed, 1 insertions, 0 deletions
diff --git a/src/libexpr/nixexpr-ast.def b/src/libexpr/nixexpr-ast.def
index ab749b3dbe84..ba8162984156 100644
--- a/src/libexpr/nixexpr-ast.def
+++ b/src/libexpr/nixexpr-ast.def
@@ -93,3 +93,4 @@ AttrRHS | Expr Pos | ATerm |
 
 eTrue = makeBool(makeTrue())
 eFalse = makeBool(makeFalse())
+sOverrides = toATerm("__overrides")