Use rplaca and rplacd instead of set over car_l/cdr_l.

This reduces the proliferation of car_l and cdr_l.
With this change, nreverse should work on chains of
objects that implement rplacd.

* combi.c (comb_gen_fun_common, rcomb_gen_fun_common): Use
rplaca.

* eval.c (mappendv, mapdov): Likewise

* hash.c (hash_equal_op): Likewise.

* lib.c (nreverse, acons_new, aconsql_new, sort_list): Use
rplaca and rplacd.

* match.c (dest_set, v_gather, v_collect, v_flatten, v_cat,
v_output, v_filter): Likewise

* parser.c (ensure_parser): Use sys_rplacd.

* unwind.c (uw_register_subtype): Use rplacd.

1 files changed, 1 insertions, 1 deletions

diff --git a/parser.c b/parser.c
index 4aa9fdeb..4f4bcdae 100644
--- a/parser.c
+++ b/parser.c
@@ -173,7 +173,7 @@ static val ensure_parser(val stream)
   val pars = cdr(cell);
   if (pars)
     return pars;
-  return set(cdr_l(cell), parser(stream, one));
+  return sys_rplacd(cell, parser(stream, one));
 }
 
 static void pushback_token(parser_t *p, struct yy_token *tok)