feat: Add rough initial version of sum types

Sum types are represented as attribute sets with a single key in them.

1 files changed, 17 insertions, 0 deletions

diff --git a/z-yants-tests.nix b/z-yants-tests.nix
index e089aab4670a..f468f61322ec 100644
--- a/z-yants-tests.nix
+++ b/z-yants-tests.nix
@@ -46,6 +46,23 @@ deepSeq rec {
     green = throw "It should not be green!";
   };
 
+  # Test sum type definitions
+  creature = sum "creature" {
+    human = struct {
+      name = string;
+      age = option int;
+    };
+
+    pet = enum "pet" [ "dog" "lizard" "cat" ];
+  };
+
+  testSum = creature {
+    human = {
+      name = "Brynhjulf";
+      age = 42;
+    };
+  };
+
   # Test curried function definitions
   func = defun [ string int string ]
   (name: age: "${name} is ${toString age} years old");