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digitalmars.D.learn - struct Foo may not define both a rvalue constructor and a copy

reply drug <drug2004 bk.ru> writes:
struct Foo
{
     this(ref const(Foo) other) {}
     this(const(Foo) other) {}
}

I'm trying to update dmd version and starting from 2.086 my code doesn't 
compile due to the error above. What is the reason of that? Is it 
temporarily situation?
Oct 16 2019
parent reply rikki cattermole <rikki cattermole.co.nz> writes:
On 17/10/2019 4:29 AM, drug wrote:

 struct Foo
 {
      this(ref const(Foo) other) {}
      this(const(Foo) other) {}
 }
 
 I'm trying to update dmd version and starting from 2.086 my code doesn't 
 compile due to the error above. What is the reason of that?


Copy constructors were added (sort of like postblit).

https://dlang.org/spec/struct.html#struct-copy-constructor


 Is it temporarily situation?


No.
Oct 16 2019
parent drug <drug2004 bk.ru> writes:
On 10/16/19 6:40 PM, rikki cattermole wrote:

 On 17/10/2019 4:29 AM, drug wrote:

 struct Foo
 {
      this(ref const(Foo) other) {}
      this(const(Foo) other) {}
 }

 I'm trying to update dmd version and starting from 2.086 my code 
 doesn't compile due to the error above. What is the reason of that?


 
 Copy constructors were added (sort of like postblit).
 
 https://dlang.org/spec/struct.html#struct-copy-constructor
 

 Is it temporarily situation?


 
 No.


My question is why the struct may not define both a rvalue ctor and a 
copy ctor?
Oct 16 2019