Data update

Task/Inverted-syntax/Pluto/inverted-syntax.pluto

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+class ibool
+    function __construct(b)
+        assert(type(b) == "boolean", "argument must be a boolean")
+        self.b = b
+    end
+
+    function iff(cond) return cond ? self.b : not self.b end
+end
+
+local itrue = new ibool(true)
+
+local need_umbrella
+local raining = true
+
+-- Normal syntax.
+if raining then need_umbrella = true end
+print($"Is it raining? {raining}. Do I need an umbrella? {need_umbrella}")
+
+-- Inverted syntax.
+raining = false
+need_umbrella = itrue:iff(raining)
+print($"Is it raining? {raining}. Do I need an umbrella? {need_umbrella}")