• =?UTF-8?B?Tm9yZGzDtnc=?= (1/1) Jan 17 2017 Is there a way to mimic C++-style `mutable` members in D?
• ketmar (4/5) Jan 17 2017 sure: don't use `const`. otherwise — no, there is simply no way
• =?UTF-8?B?Tm9yZGzDtnc=?= (3/7) Jan 17 2017 I'm aware of the difference. I'm just making sure there are no
• ketmar (3/10) Jan 17 2017 besides brutally raping it with `cast` is accessor methods — no.
• Namespace (28/29) Jan 17 2017 You could store a ptr to the member outside:

=?UTF-8?B?Tm9yZGzDtnc=?= <per.nordlow gmail.com> writes:

Is there a way to mimic C++-style `mutable` members in D?

ketmar <ketmar ketmar.no-ip.org> writes:

On Tuesday, 17 January 2017 at 20:21:34 UTC, Nordlöw wrote:
 Is there a way to mimic C++-style `mutable` members in D?

sure: don't use `const`. otherwise — no, there is simply no way 
to «mimic» 'em due to completely different meaning of `const` in 
D and C++.

=?UTF-8?B?Tm9yZGzDtnc=?= <per.nordlow gmail.com> writes:

On Tuesday, 17 January 2017 at 20:47:35 UTC, ketmar wrote:
 Is there a way to mimic C++-style `mutable` members in D?

 sure: don't use `const`. otherwise — no, there is simply no way 
 to «mimic» 'em due to completely different meaning of `const` 
 in D and C++.

I'm aware of the difference. I'm just making sure there are no 
ways out of the type system ;)

ketmar <ketmar ketmar.no-ip.org> writes:

On Tuesday, 17 January 2017 at 20:50:34 UTC, Nordlöw wrote:
 On Tuesday, 17 January 2017 at 20:47:35 UTC, ketmar wrote:
 Is there a way to mimic C++-style `mutable` members in D?

 sure: don't use `const`. otherwise — no, there is simply no 
 way to «mimic» 'em due to completely different meaning of 
 `const` in D and C++.

 I'm aware of the difference. I'm just making sure there are no 
 ways out of the type system ;)

besides brutally raping it with `cast` is accessor methods — no. 
;-)

Namespace <rswhite4 gmail.com> writes:

On Tuesday, 17 January 2017 at 20:21:34 UTC, Nordlöw wrote:
 Is there a way to mimic C++-style `mutable` members in D?

You could store a ptr to the member outside:

----
import std.stdio;

private int* _pid;

struct A
{
	int id;
	
	this(int id)
	{
		this.id = id;
		_pid = &this.id;
	}
	
	void foo() const
	{
		(*_pid)++;
	}
}

void main()
{
	A a = A(42);
	a.foo();
	
	writeln(a.id);
}
----