Associative arrays give compile error

[bearophile]

Steven Schveighoffer:

> Casting to immutable is the only way to create such a beast.

Then maybe we have to improve the language semantics to allow a better solution. See the Transients of Clojure or the larval objects of Java :-)

The compiler may need to test (at compile time) that there's only one reference to the AA and its contents, and turn it into immutable.

Bye,
bearophile