29 Oct
2018
29 Oct
'18
1:31 p.m.
Steve Johnson wrote:
Looking at the reserved words, there is one, ENTRY,
that I've never
heard of (although FORTRAN had an ENTRY statement), and there is
STRUCT but no UNION. Also, he uses val= instead of $$=. There don't
seem to be any nontrivial assignment ops (neither += or =+).
This is for Snyder's C compiler. There is something called =op which
is guess is for =+ etc.
I'm guessing either Al wrote it from scratch or
based it on some other
similar program.
Looks like you're right. I found this in another file, so it would seem
he wrote it back at MIT:
"The original YACC was designed and implemented on a PDP-11/45 and a
Honeywell 6000 by S. C. Johnson at Bell Laboratories. The version
described in this paper was implemented on the PDP-10 by Alan Snyder.