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Author SHA1 Message Date
Eelco Dolstra 37d7abd694 * New language feature: with expressions.
The expression `with E1; E2' evaluates to E2 with all bindings in
  the attribute set E1 substituted.  E.g.,

    with {x = 123;}; x

  evaluates to 123.  That is, the attribute set E1 is in scope in E2.

  This is particularly useful when importing files containing lots
  definitions.  E.g., instead of

    let {
      inherit (import ./foo.nix) a b c d e f;

      body = ... a ... f ...;
    }

  we can now say

    with import ./foo.nix;

    ... a ... f ...

  I.e., we don't have to say what variables should be brought into scope.
2004-10-25 16:54:56 +00:00
Niels Janssen 995d08208e * prevent collision on log directory 2004-09-19 15:53:37 +00:00
Eelco Dolstra 2be8ac48bb * Make the creation of user environments much faster and more storage
efficient by creating only a single symlink to entire directory
  trees unless a collission occurs.
2004-04-06 11:42:28 +00:00
Eelco Dolstra beda10f5a2 * Make perl a dependency of Nix. 2004-03-15 15:23:53 +00:00
Renamed from corepkgs/buildenv/builder.pl (Browse further)