Create custom data types

[Dennis Ritchie via Digitalmars-d-learn]

On Wednesday, 29 April 2015 at 23:22:43 UTC, Ali Çehreli wrote:
> On 04/29/2015 04:16 PM, Ali Çehreli wrote:
>
>>     ref CustomInteger opOpAssign(string op, T2)(T2 rhs)
>>     {
>>         static if (is (T2 == CustomInteger)) {
>>             mixin("value_ " ~ op ~ "= rhs.value_;");
>>             return this;
>>
>>         } else {
>>             return this.opOpAssign!(op,
>> CustomInteger)(CustomInteger(rhs));
>
> Playing a little more, the following shorter equivalent of the 
> last line works as well:
>
>     return opOpAssign!op(CustomInteger(rhs));
>
> Ali

How do I disable it?
I need to prohibit all operations to the type int.

-----
auto b = Balance(42);

int t = 4;

t += b; // error in compile time