On Saturday, 2 January 2016 at 12:07:31 UTC, John Colvin wrote:
You are manually breaking immutable by making a union of
immutable and mutable data and then writing to the mutable
reference. This is roughly equivalent to casting away immutable
and then writing to the reference. It's a bug in your code.
All references to the same data should be
1) either immutable or const
or all the references should be
2) either mutable or const (assuming the data was never
immutable).
Anything else is dangerous.
Surely the compiler should disallow this. It makes it trivial to
break the type system otherwise.
