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Make function arguments retain position info

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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; }
This commit is contained in:
Silvan Mosberger 2020-04-02 05:03:58 +02:00
parent a7540294cf
commit c34e96f7e0
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5 changed files with 14 additions and 5 deletions
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4
tests/lang/eval-okay-getattrpos-functionargs.nix Normal file
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@ -0,0 +1,4 @@
let
fun = { foo }: {};
pos = builtins.unsafeGetAttrPos "foo" (builtins.functionArgs fun);
in { inherit (pos) column line; file = baseNameOf pos.file; }