Add custom operators (Part 2)

tests/test_operators.lua

@@ -1,24 +1,22 @@
 local a, b, c = 0, 0, 0
-
 b+=1
 c++; local foo = "bar";
 print(c-=1)
 print(c++)
 local t = {
 	a = a++,
-	b = b++,
-	c = c++,
+	b = 2,
+	c = c+=2,
 	d = a&3,
+	e = 1,
 }
+t["b"] <<= 4
 print(dump(t))
-
 --c += 1
 c*=2
-
 local i = 16
 i += i<<4
 print(i) -- 272
-
 print(a+=2) -- 2
 print(c++) -- 3
 print(a-=1) -- -1