On 12-04-15 06:23 PM, Joe Groff wrote: > On Sun, Apr 15, 2012 at 6:19 PM, Patrick Walton <pwal...@mozilla.com> wrote: >> Only if LLVM's optimizer is smart enough to turn that code into a goto-based >> state machine. I'm not sure if it is. (Of course, if it's not, that's >> possibly fixable...) > > IIRC there was talk of adding explicit tail calls to the language a > while back. Did that get shot down?
They're already "present" (were from the beginning) but they broke when we shifted from rustboot (hand-rolled code generator) to rustc (LLVM). It turns out that you have to adopt a somewhat pessimistic ABI in all cases if your functions are to be tail-callable. There's a bug open on this[1] that discusses in some more detail, but I think the feature is drifting towards a decision to remove the feature altogether. -Graydon [1] https://github.com/mozilla/rust/issues/217 _______________________________________________ Rust-dev mailing list Rust-dev@mozilla.org https://mail.mozilla.org/listinfo/rust-dev
