• Gor Gyolchanyan <gor.f.gyolchanyan gmail.com> Oct 25 2011
• Timon Gehr <timon.gehr gmx.ch> Oct 25 2011
• Gor Gyolchanyan <gor.f.gyolchanyan gmail.com> Oct 25 2011

Gor Gyolchanyan <gor.f.gyolchanyan gmail.com> writes:

What's the difference between const-declared variable and
immutable-declared variable?

module a;

const(int) a;
immutable(int) b;

void main()
{
}

Timon Gehr <timon.gehr gmx.ch> writes:

On 10/25/2011 12:15 PM, Gor Gyolchanyan wrote:
 What's the difference between const-declared variable and
 immutable-declared variable?

 module a;

 const(int) a;
 immutable(int) b;

 void main()
 {
 }


Both cannot change, but one is typed as const and the other as 
immutable. You usually don't want to declare const variables that way, 
because they cannot be passed by reference to immutable even though 
technically they would be immutable.

Gor Gyolchanyan <gor.f.gyolchanyan gmail.com> writes:

Why don't then change then? const-declared variables would make a lot
more sense to be always placed in mutable memory, so that they could
be used as logical consts.

On Tue, Oct 25, 2011 at 4:35 PM, Timon Gehr <timon.gehr gmx.ch> wrote:
 On 10/25/2011 12:15 PM, Gor Gyolchanyan wrote:
 What's the difference between const-declared variable and
 immutable-declared variable?

 module a;

 const(int) a;
 immutable(int) b;

 void main()
 {
 }


 Both cannot change, but one is typed as const and the other as immutable.
 You usually don't want to declare const variables that way, because they
 cannot be passed by reference to immutable even though technically they
 would be immutable.