this(this) / opAssign

[Era Scarecrow]

On Thursday, 10 January 2013 at 23:03:30 UTC, Namespace wrote:
> Is it expected behaviour that this code compiles and prints:

  I think it is. Postblit 'this(this)' occurs while initializing a 
variable from one, rather than copying. Which you also can 
compare against move symantics.

  Correct me if i'm wrong.

   struct S {
     this(this) {writeln("this(this)"); }
     void opAssign(ref S s) {writeln("opAssign ref/copy");}
     void opAssign(S s) {writeln("opAssign move");}
   }



   //postblit
   S s1;
   S s2 = s1;

   //opAssign ref (copy)
   S s3;
   s3 = s1;

   //opAssign S (Move)
   S func() {return S();}
   s3 = func();


output:
   this(this)
   opAssign ref/copy
   opAssign move