Re: XCAR/XCDR as lvalues
sperber(a)informatik.uni-tuebingen.de (Michael Sperber [Mr. Preprocessor]) writes:
>>>>> "Hrvoje" == Hrvoje Niksic
<hniksic(a)srce.hr> writes:
Hrvoje> Many of the recent performance changes included replacing Fsetcar()
Hrvoje> and Fsetcdr() with XCAR/XCDR on the left side of an
Hrvoje> assignment.
This is also bad for another reason---if we ever want to put in a
write barrier to support faster GC, we'll have to change things back
to Fsetcar/cdr.
I won't change things back to Fsetcar/cdr because they introduce
needless error checking (the point of XCAR/XCDR is that we *know*
we're accessing conses), but I think I'll introduce XSETCAR/XSETCDR
macros with no loss of speed.