feat: Improved error message for missing struct fields

2019-08-08 15:07:36 +01:00 · 2019-08-08 15:07:36 +01:00 · ca0cf11ca9
commit ca0cf11ca9
parent 4ebc069a3f
2 changed files with 2 additions and 1 deletions
--- a/yants.nix
+++ b/yants.nix
@ -35,7 +35,8 @@ with builtins; let
      type = def."${field}";
      checked = type.check fieldVal;
  in if checked then (current && true)
-     else (throw "Field ${field} is of type ${typeOf fieldVal}, but expected ${type.name}");
+     else if isNull fieldVal then (throw "Missing required ${type.name} field '${field}'")
+          else  (throw "Field ${field} is of type ${typeOf fieldVal}, but expected ${type.name}");

  checkExtraneous = name: def: present:
  if (length present) == 0 then true
--- a/z-structs.png
+++ b/z-structs.png