Added a lot of stdlib's to lib/ and many small fixes. (0.16.4)

lib/utils/range.fun

@@ -0,0 +1,48 @@
+/*
+ * This file is part of the Fun programming language.
+ * https://hanez.org/project/fun/
+ *
+ * Copyright 2025 Johannes Findeisen
+ * Licensed under the terms of the Apache-2.0 license.
+ * https://opensource.org/license/apache-2-0
+ *
+ * Added: 2025-10-01
+ */
+
+// Range utilities (end-exclusive)
+
+// range(n) -> [0, 1, ..., n-1]
+fun range(n)
+  out = []
+  number i = 0
+  while i < n
+    push(out, i)
+    i = i + 1
+  return out
+
+// range2(start, end) -> [start, start+1, ..., end-1]
+fun range2(start, end)
+  out = []
+  number i = start
+  while i < end
+    push(out, i)
+    i = i + 1
+  return out
+
+// range3(start, end, step) with positive or negative step (non-zero)
+fun range3(start, end, step)
+  out = []
+  number s = step
+  if (s == 0)
+    return out
+  if (s > 0)
+    number i = start
+    while i < end
+      push(out, i)
+      i = i + s
+  else
+    number j = start
+    while j > end
+      push(out, j)
+      j = j + s
+  return out