diff --git a/build.bat b/build.bat
index 6e5450c2b..b95e8a2ab 100644
--- a/build.bat
+++ b/build.bat
@@ -39,7 +39,6 @@ set linker_settings=%libs% %linker_flags%
 del *.pdb > NUL 2> NUL
 del *.ilk > NUL 2> NUL
 
-
 cl %compiler_settings% "src\main.cpp" ^
 	/link %linker_settings% -OUT:%exe_name% ^
 	&& odin run examples/demo/demo.odin
diff --git a/examples/demo/demo.odin b/examples/demo/demo.odin
index 5ee9ded84..cd6ac6bf5 100644
--- a/examples/demo/demo.odin
+++ b/examples/demo/demo.odin
@@ -50,9 +50,9 @@ extra_general_stuff :: proc() {
 		i := i32(137);
 		ptr := &i;
 
-		_ = (^f32)(ptr);
+		_ = (^f32)(ptr); // Call-based syntax
 		// ^f32(ptr) == ^(f32(ptr))
-		_ = cast(^f32)ptr;
+		_ = cast(^f32)ptr; // Operator-based syntax
 
 		_ = (^f32)(ptr)^;
 		_ = (cast(^f32)ptr)^;
@@ -1188,6 +1188,21 @@ where_clauses :: proc() {
 	}
 }
 
+ranged_fields_for_array_compound_literals :: proc() {
+	fmt.println("\n#ranged fields for array compound literals");
+	{ // Normal Array Literal
+		foo := [?]int{1, 4, 9, 16};
+		fmt.println(foo);
+	}
+	i := 2;
+	foo := [?]int {
+	    0 = 123,
+	    5..9 = 54,
+	    10..<16 = i*3 + (i-1)*2,
+	};
+	fmt.println(foo); // [123, 0, 0, 0, 0, 54, 54, 54, 54, 54, 8, 8, 8, 8, 8]
+}
+
 main :: proc() {
 	when true {
 		extra_general_stuff();
@@ -1210,6 +1225,7 @@ main :: proc() {
 		quaternions();
 		inline_for_statement();
 		where_clauses();
+		ranged_fields_for_array_compound_literals();
 	}
 }
 
diff --git a/src/range_cache.cpp b/src/range_cache.cpp
new file mode 100644
index 000000000..9701fb432
--- /dev/null
+++ b/src/range_cache.cpp
@@ -0,0 +1,70 @@
+
+// Integers only
+struct RangeValue {
+	i64 lo;
+	i64 hi;
+};
+
+struct RangeCache {
+	Array<RangeValue> ranges;
+};
+
+
+RangeCache range_cache_make(gbAllocator a) {
+	RangeCache cache = {};
+	array_init(&cache.ranges, a);
+	return cache;
+}
+
+void range_cache_destroy(RangeCache *c) {
+	array_free(&c->ranges);
+}
+
+bool range_cache_add_index(RangeCache *c, i64 index) {
+	for_array(i, c->ranges) {
+		RangeValue v = c->ranges[i];
+		if (v.lo <= index && index <= v.hi) {
+			return false;
+		}
+	}
+	RangeValue v = {index, index};
+	array_add(&c->ranges, v);
+	return true;
+}
+
+
+bool range_cache_add_range(RangeCache *c, i64 lo, i64 hi) {
+	GB_ASSERT(lo <= hi);
+	for_array(i, c->ranges) {
+		RangeValue v = c->ranges[i];
+		if (hi < v.lo) {
+			continue;
+		}
+		if (lo > v.hi) {
+			continue;
+		}
+
+		if (v.hi < hi) {
+			v.hi = hi;
+		}
+		if (lo < v.lo) {
+			v.lo = lo;
+		}
+		c->ranges[i] = v;
+		return false;
+	}
+	RangeValue v = {lo, hi};
+	array_add(&c->ranges, v);
+	return true;
+}
+
+
+bool range_cache_index_exists(RangeCache *c, i64 index) {
+	for_array(i, c->ranges) {
+		RangeValue v = c->ranges[i];
+		if (v.lo <= index && index <= v.hi) {
+			return true;
+		}
+	}
+	return false;
+}