runtime mutable global state

examples/programs/mutable_global/main.bro

@@ -0,0 +1,30 @@
+Point :: struct {
+	x i32
+}
+
+counter int = 0
+ratio float = 1
+span range = 0..2
+point Point = Point { x = 1 }
+values [_]mut i32 = [10, 20]
+
+bump func(value @mut i32) void {
+	value^ += 1
+}
+
+main func() i32 {
+	counter = 10
+	counter += 5
+	bump(&counter)
+	point.x += counter
+	values[1] = point.x
+
+	total i32 = counter + point.x + values[1]
+	for span |i| {
+		total += i
+	}
+	if ratio == 1.0 {
+		total += 1
+	}
+	return total
+}