New function: hist-sort-by.

* eval.c (eval_init): Register hist-sort-by intrinsic.

* lib.c (hist_sort_by): New function.
(hist_sort): Wrapper for hist_sort_by now.

* lib.h (hist_sort_by): Declared.

* tests/012/sort.tl: Tests.

* txr.1: Documented.

1 files changed, 1 insertions, 0 deletions

diff --git a/eval.c b/eval.c
index 0406dd78..828ba73e 100644
--- a/eval.c
+++ b/eval.c
@@ -7426,6 +7426,7 @@ void eval_init(void)
   reg_fun(intern(lit("uniq"), user_package), func_n1(uniq));
   reg_fun(intern(lit("grade"), user_package), func_n3o(grade, 1));
   reg_fun(intern(lit("hist-sort"), user_package), func_n1v(hist_sort));
+  reg_fun(intern(lit("hist-sort-by"), user_package), func_n2v(hist_sort_by));
 
   reg_fun(intern(lit("nrot"), user_package), func_n2o(nrot, 1));
   reg_fun(intern(lit("rot"), user_package), func_n2o(rot, 1));