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+// Test deeply nested when expressions
+classify : x y ->
+  when x is
+    0 then when y is
+             0 then "origin"
+             1 then "y-axis"
+             _ then when y > 0 is
+                     true then "positive y-axis"
+                     false then "negative y-axis"
+    1 then when y is
+             0 then "x-axis"
+             1 then "diagonal"
+             _ then when y > 0 is
+                     true then when y > 10 is
+                             true then "far positive diagonal"
+                             false then "close positive diagonal"
+                     false then "negative diagonal"
+    _ then "other quadrant";
+
+// Test with multiple discriminants and nesting
+complexCase : a b c ->
+  when a b is
+    0 0 then when c is
+               1 then "case 1"
+               2 then when true is
+                        true then "nested true"
+                        false then "nested false"
+               _ then "default c"
+    1 _ then "partial match"
+    _ _ then "catch all";