PRE-PROPOSAL: Simple operator overloading. (original) (raw)

Vilya Harvey vilya.harvey at gmail.com
Wed Mar 25 05:03:37 PDT 2009

I would love to see this, but I'd prefer it to be based on special interfaces rather than annotations. This would adhere to the principle, mentioned on this list a few times, that annotations shouldn't modify the results of the compiler.

For example, if you implement the Addable (say) interface then your class can be used the '+' operator; or the Subtractable interface for the '-' operator. I'd imagine you would also want some grouping interfaces, to reduce the number of interface declarations required when overloading multiple operators (e.g. interface Artihmetic extends Addable, Subtractable etc.).

Whatever form it takes though, it would be great to have this capability in Java!

Vil.

2009/3/25 <rssh at gradsoft.com.ua>:

Permanent URL: http://docs.google.com/Doc?id=dhhvggr818djp85shk

Probably too big, but anyway. As I remember, alternative proposal (made [] and []= syntax sugar on well-known interfaces, as with for-each loop) still not submitted. If anybody want submit such proposal, then it is possible to reuse JLS-changed for 15.26.1 from there.

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