bitwise expressions compiler

res/modules/bitwise/util.lua

@@ -0,0 +1,21 @@
+local util = { }
+
+util.stack = { }
+
+function util.throw(column, msg)
+	error("column "..column..": "..msg)
+end
+
+function util.stack.push(stack, value)
+	table.insert(stack, value)
+end
+
+function util.stack.pop(stack)
+	return table.remove(stack, #stack)
+end
+
+function util.stack.top(stack)
+	return stack[#stack]
+end
+
+return util