Changing the class data underneath some reference

David Colson david at peripherallabs.com
Thu Nov 30 00:40:51 UTC 2017


Hello all!

I'm getting settled into D and I came into a problem. A code 
sample shows it best:

class SomeType
{
     string text;
     this(string input) {text = input;}
}


void main()
{
     SomeType foo = new SomeType("Hello");

     SomeType bar = foo;

     foo = new SomeType("World");

     writeln(bar.text); // Prints hello
     // I'd like it to print World
}

In the C++ world I could do this using pointers and changing the 
data underneath a given pointer, but I can't use pointers in D, 
so I'm not sure how I can get this behaviour?

I'd be open to other ways of achieving the same affect in D, 
using more D like methods.


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