• Piotr Mitana (15/15) Jul 19 2017 Hello, I have this code:
• bauss (3/19) Jul 20 2017 I'd say it's a bug. There was a similar issue at one point where
• Eugene Wissner (2/18) Jul 20 2017 Interesting that the same code without immutable works.
• arturg (6/22) Jul 20 2017 compiles with:

Piotr Mitana <piotrekm niepodam.pl> writes:

Hello, I have this code:

immutable class Base
{
	this() {}
}

immutable class Derived : Base {}

void main()
{
	new immutable Derived();
}

I'd like class Derived to automatically inherit the default 
constructor from Base. However, this is not the case:

main.d(6): Error: class main.Derived cannot implicitly generate a 
default ctor when base class main.Base is missing a default ctor

Is it a bug or it should be like this?

bauss <jj_1337 live.dk> writes:

On Wednesday, 19 July 2017 at 16:00:56 UTC, Piotr Mitana wrote:
 Hello, I have this code:

 immutable class Base
 {
 	this() {}
 }

 immutable class Derived : Base {}

 void main()
 {
 	new immutable Derived();
 }

 I'd like class Derived to automatically inherit the default 
 constructor from Base. However, this is not the case:

 main.d(6): Error: class main.Derived cannot implicitly generate 
 a default ctor when base class main.Base is missing a default 
 ctor

 Is it a bug or it should be like this?

I'd say it's a bug. There was a similar issue at one point where 
it wouldn't consider default constructor with default args.

Eugene Wissner <belka caraus.de> writes:

On Wednesday, 19 July 2017 at 16:00:56 UTC, Piotr Mitana wrote:
 Hello, I have this code:

 immutable class Base
 {
 	this() {}
 }

 immutable class Derived : Base {}

 void main()
 {
 	new immutable Derived();
 }

 I'd like class Derived to automatically inherit the default 
 constructor from Base. However, this is not the case:

 main.d(6): Error: class main.Derived cannot implicitly generate 
 a default ctor when base class main.Base is missing a default 
 ctor

 Is it a bug or it should be like this?

Interesting that the same code without immutable works.

arturg <var.spool.mail700 gmail.com> writes:

On Wednesday, 19 July 2017 at 16:00:56 UTC, Piotr Mitana wrote:
 Hello, I have this code:

 immutable class Base
 {
 	this() {}
 }

 immutable class Derived : Base {}

 void main()
 {
 	new immutable Derived();
 }

 I'd like class Derived to automatically inherit the default 
 constructor from Base. However, this is not the case:

 main.d(6): Error: class main.Derived cannot implicitly generate 
 a default ctor when base class main.Base is missing a default 
 ctor

 Is it a bug or it should be like this?

compiles with:
dmd 2.073

fails with:
dmd 2.074
dmd 2.075