init lux

examples/effects.lux

@@ -0,0 +1,35 @@
+// Demonstrating algebraic effects in Lux
+
+// Define a custom logging effect
+effect Logger {
+    fn log(level: String, msg: String): Unit
+    fn getLevel(): String
+}
+
+// A function that uses the Logger effect
+fn processData(data: Int): Int with {Logger} = {
+    Logger.log("info", "Processing data...")
+    let result = data * 2
+    Logger.log("debug", "Result computed")
+    result
+}
+
+// A handler that prints logs to console
+handler consoleLogger: Logger {
+    fn log(level, msg) = Console.print("[" + level + "] " + msg)
+    fn getLevel() = "debug"
+}
+
+// A handler that ignores logs (for testing)
+handler nullLogger: Logger {
+    fn log(level, msg) = ()
+    fn getLevel() = "none"
+}
+
+// Main function showing handler usage
+fn main(): Unit with {Console} = {
+    let result = run processData(21) with {
+        Logger = consoleLogger
+    }
+    Console.print("Final result: " + result)
+}