[Haskell-cafe] Lazy language on JVM/CLR

Edward Kmett ekmett at gmail.com
Tue Feb 9 09:36:21 EST 2010

On Mon, Feb 8, 2010 at 8:16 PM, John Meacham <john at repetae.net> wrote:

> > I expect others have forethought and perhaps even experimented with such
> > a language. Are there any dangers to be wary of that undo the entire
> > endeavour?
> There have been a couple papers published on it, the main sticking point
> seems to be tail call elimination. When targeting real hardware you
> always had the option of dropping to assembly to do a direct jump, but
> there isn't an equivalent in the JVM. If you look up tail call + jvm you
> will probably get a few hits. I believe there are even a couple haskell
> specific papers on the issue.

One of the easiest approaches to this comes from the scheme folks and I've
been able to employ it fairly effectively in toy compilers. It doesn't
require anything from the host language except exceptions and you can use it
to evaluate spineless tagless g-machine frames mostly on the native/VM stack
fairly easily. The biggest problem is the generated code bloat factor of
about 2-3x.


-Edward Kmett
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