Re: lazy construction of an immutable object

[Jason den Dulk via Digitalmars-d-learn]

On Tuesday, 15 July 2014 at 12:20:57 UTC, Puming wrote:
@property immutable(T) freeze(T)(T obj)
{
        return cast(immutable(T))(obj);
}

What is the idiomatic approach to do this in D?

There is a Phobos function std.exception.assumeUnique which 
performs this for arrays. According to the docs, it does what 
'freeze' does, and is considered idiomatic.

But the draw back is that you can't garanteed that the mutable 
object is never used.

I got the impression that assumeUnique has the same problem.

Regards