Sealed classes - would you want them in D?

[KingJoffrey]

On Saturday, 12 May 2018 at 18:36:59 UTC, Walter Bright wrote:
> On 5/12/2018 9:42 AM, Mike Parker wrote:
>> Thank goodness we don't have to do this silliness.
>
> I always thought the 'friend' business in C++ was an awful 
> hack. But C++ didn't have modules, and modules are a much 
> better solution to that problem.

Modules would only be a better solution, if, and only if, the 
programmer still had control over class level encapsulation.

At least 'friend' in c++, is in the control of the programmer.

D has decided the programmer doesn't need this control anymore, 
takes that control away, and gives it to the module - the 
programmer has no say in it - even if the programmer want's it 
private, the module overrides private!!

I would expect, that like me, 10's of millions of other 
programmers would not be comfortable with this.

That the '< 1000' D programmers think otherwise, doesn't make the 
case.

Go back and give the programmer control, as to whether the class 
or the module has the greater authority, and perhaps...then... D 
will attract more programmers.

Feel free to show the code below, to all the C#/C++/Java 
programmers out there - I'm sure they'll love what D has done 
with the class-module interaction.

================================
module test;

import std.stdio : writeln;

void main()
{
     Person p = new Person("King Joffrey");

     writeln(p.getName); // I designed my class to present this 
interface.
     writeln(p._name); // The module couldn't care less about your 
interface.

     p._name = "King Walter"; // even worse, the module can 
de-throne the king!!
     writeln(p._name);
}

class Person
{
     private string _name;

     public void setName(string name)
     {
         this._name = name;
     }

     public string getName()
     {
         return ProperName(this._name);
     }

     public this(string name)
     {
         _name = name;
     }

     private static string ProperName(string name)
     {
         return name ~ " : The one true king!";
     }
}

===========================================