ufff

examples/objects_more.fun

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+#!/usr/bin/env fun
+
+// Objects as maps: nested fields, methods with explicit self
+
+// A method to move a 2D point by dx, dy
+fun move(self, dx, dy)
+  self["x"] = self["x"] + dx
+  self["y"] = self["y"] + dy
+  return 0
+
+// Create a point directly and inspect fields
+p = { "x": 1, "y": 2, "move": move }
+print(p["x"])          // -> 1
+print(p["y"])          // -> 2
+
+// Update a field directly
+p["x"] = 10
+print(p["x"])          // -> 10
+
+// Call method with explicit self
+move(p, 3, -2)
+print(p["x"])          // -> 13
+print(p["y"])          // -> 0
+
+// Nested object example
+rect = {
+  "pos": { "x": 0, "y": 0 },
+  "size": { "w": 5, "h": 4 }
+}
+print(rect["pos"]["x"])    // -> 0
+print(rect["size"]["w"])   // -> 5
+
+// Mutate nested fields
+rect["pos"]["x"] = rect["pos"]["x"] + 7
+rect["size"]["h"] = rect["size"]["h"] + 1
+print(rect["pos"]["x"])    // -> 7
+print(rect["size"]["h"])   // -> 5
+
+/* Expected output:
+1
+2
+10
+13
+0
+0
+5
+7
+5
+*/