nix-super/tests/lang/eval-okay-getattrpos-functionargs.nix at 27c8029573ab49ad11c069ef547e3c087c73939f - max/nix-super - The Forge

max/nix-super

mirror of https://github.com/privatevoid-net/nix-super.git synced 2024-11-11 00:36:20 +02:00

Silvan Mosberger c34e96f7e0

Make function arguments retain position info

This allows querying the location of function arguments. E.g.

  builtins.unsafeGetAttrPos "x" (builtins.functionArgs ({ x }: null))

  => { column = 57; file = "/home/infinisil/src/nix/inst/test.nix"; line = 1; }

2020-04-02 05:52:52 +02:00

4 lines

156 B

Nix

Raw Blame History

 let
   fun = { foo }: {};
   pos = builtins.unsafeGetAttrPos "foo" (builtins.functionArgs fun);
 in { inherit (pos) column line; file = baseNameOf pos.file; }