[Haskell-cafe] Haskell on JVM
wren ng thornton
wren at freegeek.org
Tue Jun 30 21:34:05 EDT 2009
Claus Reinke wrote:
> |Basically, the JVM lacks a native ability to do tail calls. It does
> |not have an instruction to remove/replace a stack frame without
> |executing an actual return to the calling method/function.
> There is a conflict between preserving stack layout and efficient
> tail calls. Unfortunately, stack inspection appears to be used for
> security aspects in JVM. That doesn't make tail calls impossible,
> but may have slowed down progress as this argument always
> comes up in discussing tail calls on the JVM (since its byte code
> isn't just an internal detail, but an externally used API).
It's a bugbear, but it's not impossible:
Maybe one day it'll be here.
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