constant expression

[Marc Schütz via Digitalmars-d-learn]

On Tuesday, 23 February 2016 at 08:00:24 UTC, Nicholas Wilson 
wrote:
> Silly question. Why is this necessary?

Due to a problem with the implementation, associative arrays 
currently can't be initialized statically. We hope it will 
eventually get fixed, but until then, you have to use module 
constructors as a workaround.