How to disable assigning a value to a property?

[Tejas]

On Tuesday, 6 July 2021 at 10:06:11 UTC, Jack Applegame wrote:
> 

Here's another way using ``` std.typecons ```

```d
import std.stdio;
import std.typecons;
alias input = Typedef!int; //new code
struct Field {
     void opAssign(int a) {
         writefln("Field.opAssign(%s)", a);
     }
}

struct Register {
     Field clock(input a) {
         writefln("Register.clock(%s)", cast(int)a); //note the 
cast
         return Field();
     }
}


void main() {
     input ip = 1;
     Register register;
     register.clock(ip) = 10; // works, good
     //register.clock = 10;    // works too, how to disable it?    
EDIT: Now it doesn't work :)
}
```

You will have to either cast your literal, or provide a variable 
with the new type as input though,  so it is also not perfect.