New variants of each operator for sum and product.

* lisplib.c (arith_each_instantiate, arith_each_set_entries): New
functions.
(each_prod_set_entries): Add sum-each-prod, sum-each-prod*,
mul-each-prod and mul-each-prod* as autoload triggers for
each-prod.tl, where those macros are now defined.
(lisplib_init): Register autoloading of arith-each.tl via the
two new functions.

* stdlib/arith-each.tl: New file.

* stdlib/each-prod.tl (sys:expand-each-prod*): Handle sum-each-prod* and
mul-each-prod* in the same way, by mapping to their parallel binding
counterparts.
(sys:expand-arith-each-prod): New function.
(sym-each-prod, mul-each-prod, sum-each-prod*, mul-each-prod*): New
macros.

* tests/016/arith.tl: New tests.

* txr.1: Documented.

* stdlib/doc-syms.tl: Updated.

1 files changed, 20 insertions, 0 deletions

diff --git a/lisplib.c b/lisplib.c
index 3a5beb78..17485812 100644
--- a/lisplib.c
+++ b/lisplib.c
@@ -835,6 +835,23 @@ static val copy_file_set_entries(val dlt, val fun)
   return nil;
 }
 
+static val arith_each_instantiate(val set_fun)
+{
+  funcall1(set_fun, nil);
+  load(scat2(stdlib_path, lit("arith-each")));
+  return nil;
+}
+
+static val arith_each_set_entries(val dlt, val fun)
+{
+  val name[] = {
+    lit("sum-each"), lit("mul-each"), lit("sum-each*"), lit("mul-each*"),
+    nil
+  };
+  set_dlt_entries(dlt, name, fun);
+  return nil;
+}
+
 static val each_prod_instantiate(val set_fun)
 {
   funcall1(set_fun, nil);
@@ -846,7 +863,9 @@ static val each_prod_set_entries(val dlt, val fun)
 {
   val name[] = {
     lit("each-prod"), lit("collect-each-prod"), lit("append-each-prod"),
+    lit("sum-each-prod"), lit("mul-each-prod"),
     lit("each-prod*"), lit("collect-each-prod*"), lit("append-each-prod*"),
+    lit("sum-each-prod*"), lit("mul-each-prod*"),
     nil
   };
   set_dlt_entries(dlt, name, fun);
@@ -1009,6 +1028,7 @@ void lisplib_init(void)
   dlt_register(dl_table, save_exe_instantiate, save_exe_set_entries);
   dlt_register(dl_table, defset_instantiate, defset_set_entries);
   dlt_register(dl_table, copy_file_instantiate, copy_file_set_entries);
+  dlt_register(dl_table, arith_each_instantiate, arith_each_set_entries);
   dlt_register(dl_table, each_prod_instantiate, each_prod_set_entries);
   dlt_register(dl_table, quips_instantiate, quips_set_entries);
   dlt_register(dl_table, match_instantiate, match_set_entries);