testing changes and JString

testing/testshadow.cpp

@@ -0,0 +1,70 @@
+#include <iostream>
+#include <cstddef>
+
+using namespace std;
+
+struct proxy_obj;
+
+struct my_bit_array
+{
+
+       uint8_t bit_array_;
+
+       proxy_obj operator[](int n);
+}
+;
+
+struct proxy_obj
+{
+
+       my_bit_array& my_bit_array_;
+       int n_;
+
+       proxy_obj(my_bit_array& bit_array, int n)
+     : my_bit_array_(bit_array), n_(n) 
+       {
+       }
+
+
+       proxy_obj& operator=(bool b)
+     {
+
+	        uint8_t set_mask = 0x01 << n_;
+
+	        if(b) my_bit_array_.bit_array_ |= set_mask;
+	        else  my_bit_array_.bit_array_ &= (~set_mask);
+
+	        return *this;
+     }
+
+
+       operator bool()
+     {
+	 return my_bit_array_.bit_array_ & (0x01 << n_); 
+     }
+
+}
+;
+
+proxy_obj my_bit_array::operator[](int n)
+{
+
+       return proxy_obj(*this, n);
+}
+
+
+int main() 
+{
+
+       my_bit_array bit_set;
+
+       bit_set[0] = false;
+       bool b = bit_set[0];
+       cout << b << endl;
+
+       bit_set[3] = true;
+       b = bit_set[3];
+       cout << b << endl;
+
+       return 0;
+}