Some more stdlib fun and example code and cosmetic changes. (0.38.15)

lib/utils/match.fun

@@ -0,0 +1,36 @@
+/*
+ * This file is part of the Fun programming language.
+ * https://fun-lang.xyz/
+ *
+ * Copyright 2026 Johannes Findeisen
+ * Licensed under the terms of the Apache-2.0 license.
+ * https://opensource.org/license/apache-2-0
+ *
+ * Added: 2026-02-19
+ */
+
+// A simple dynamic match helper.
+// Usage:
+// match(x, [
+//   {"when": fun(v) v > 0, "then": fun(v) print("pos")},
+//   {"is": 0, "then": fun(v) print("zero")},
+//   {"else": fun(v) print("neg or other")}
+// ])
+
+fun match(value, cases)
+  // Iterate cases in order; support keys: is, when, else
+  for c in cases
+    if (has_key(c, "is"))
+      if (value == c["is"]) 
+        th = c["then"]
+        return th(value)
+    else if (has_key(c, "when"))
+      pred = c["when"]
+      if (pred(value))
+        th = c["then"]
+        return th(value)
+    else if (has_key(c, "else"))
+      el = c["else"]
+      return el(value)
+  // No match; return nil
+  return nil