[m-dev.] for review: a new way of handling failure

[Fergus Henderson]

Zoltan Somogyi, you wrote:
> 
> > > <ul>
> > > <il> Best case.
> > > Before the code generator enters a goal that is being committed across,
> > > it saves the value of maxfr,
> > > pushes a new entry on the resume point stack indicating
> > > the resume point for getting control back if the goal has no solutions
> > > and sets the redoip slot of the top frame (which is this frame)
> > > to the stack continuation in that resume point.
> > 
> > I think the remark in parentheses above is wrong.  Why is it guaranteed
> > that the top frame will be the same as the current frame?
> 
> Because a case is not best case unless curfr_is_maxfr=yes. This is also true
> for middle case; only in worst case is it not guaranteed to be the case.

Oh yeah.  I'll try that again with brain switched on next time ;-)

-- 
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