Bug 23596 – override deprecated of deprecated base class could work

I seem to have found a messy scenario. The base class has an old way and a new way. I want to get the users to migrate to the new way: ----- class Base { deprecated("Use newWay instead") abstract string oldWay(); abstract string newWay(); } class Child : Base { /+ // if I keep a compatibility thing I get: depre.d(14): Deprecation: `depre.Child.oldWay` is overriding the deprecated method `depre.Base.oldWay` Which is fine, I want the children to know they should migrate, but if they do.... +/ // override string oldWay() { return newWay(); } /+ // ...if I only implement the new way, I'm stuck: depre.d(11): Error: cannot create instance of abstract class `Child` depre.d(11): function `string oldWay()` is not implemented +/ override string newWay() { return "yay"; } /+ // so I'm forced to implement it. But I want to acknowledge // I'm only doing it for the migration and want to forward deprecated // and now I get two! warnings: depre.d(27): Deprecation: `depre.Child.oldWay` is overriding the deprecated method `depre.Base.oldWay` depre.d(27): Deprecation: `depre.Child.oldWay` cannot be marked as `deprecated` because it is overriding a function in the base class +/ override deprecated string oldWay() { return newWay(); } } void main() { auto child = new Child(); } --- I can't deprecate it without the user code getting more problems. I can't remove it without breaking the user experience (I really like the compiler telling them what changed as they use it!) I can change the base class to remove `abstract` to make it work, but it would be nice if there was a way to indicate it on the base but also indicate it as handled on the child; I think an `override deprecated` ought to suppress the warning and pass it on to the next user. Probably related to : https://issues.dlang.org/show_bug.cgi?id=17586

> I can change the base class to remove `abstract` to make it work, but it > would be nice if there was a way to indicate it on the base but also > indicate it as handled on the child; I think an `override deprecated` ought > to suppress the warning and pass it on to the next user. > > > Probably related to : https://issues.dlang.org/show_bug.cgi?id=17586 If I understand correctly, you want this code: class Base { deprecated("Use newWay instead") abstract string oldWay(); abstract string newWay(); } class Child : Base { override string newWay() { return "yay"; } override deprecated string oldWay() { return newWay(); } } void main() { auto child = new Child(); } To compile gracefully? If that is the case, then this already happens in the latest master.

oh nice, then already fixed somehow since the previous release.