for loops

examples/programs/for_loop/main.bro

@@ -0,0 +1,52 @@
+# Milestone 5: ranges and sequence for loops.
+
+pass :: func(value int) int {
+	return value
+}
+
+main :: func() i32 {
+	total i32 = 0
+
+	items [3]mut i32 = [1, 2, 3]
+	for items |item, index| {
+		total = total + item
+		_ = index
+	}
+
+	for (&items) |@item| {
+		item^ = item^ + 1
+	}
+
+	view []mut i32 = (&items)[..]
+	for view |@item, index| {
+		item^ = item^ + 1
+		_ = index
+	}
+	for view |item| {
+		total = total + item
+	}
+
+	for [4, 5] |item| {
+		total = total + item
+	}
+
+	for "ab" |byte| {
+		_ = byte
+		total = total + 1
+	}
+
+	for 0..4 |value| {
+		total = total + value
+	}
+	for 1..=3 |value| {
+		total = total + value
+	}
+
+	once :: 0..1
+	for pass(once) |value| {
+		_ = value
+		total = total + 1
+	}
+
+	return total
+}