String concatenation tweaks

Ali Ebrahimi ali.ebrahimi1781 at
Thu Jun 4 13:59:38 UTC 2015

Please add String Interpolation and Multi-line String: in that case we
would have better answer for problem.

On Thu, Jun 4, 2015 at 6:11 PM, Aleksey Shipilev <
aleksey.shipilev at> wrote:

> On 06/04/2015 03:56 PM, Aleksey Shipilev wrote:
> > On 06/04/2015 03:35 PM, Maurizio Cimadamore wrote:
> >> Well, yes - but adding a new indy is not something that comes for free.
> >> We are currently fighting to get specialization to work correctly with
> >> lambdas, and it turns out that having an indy, as Brian said, is like
> >> having an entirely new bytecode - so, for every new 'officially
> >> supported' bootstrap that we add, we will need to find ways to make that
> >> work with whatever new feature XYZ we could come up in the future.
> >
> > Yes. This is why we better spend time figuring if the proposed indy
> > interface is enough/future-proof.
> In other words, we do indeed introducing something similar to a new
> bytecode, a long missing "string concat". Would you argue we need to
> continue band-aiding the impedance between JLS allowing String concat
> and JVMS not having the appropriate facilities for it -- and forcing the
> VM implementations to recognize all these translated forms? Indy allows
> us to overcome this impedance with one leap.
> This also opens up the way into using the (potentially unsafe) private
> APIs for concat on VM side, like fixed-length string builders proposed
> in this thread. Doing the same on javac side would mean these private
> APIs have to be leaked into public.
> Thanks,
> -Aleksey.


Best Regards,
Ali Ebrahimi
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