Add sum and prod convenience functions.

* eval.c (eval_init): prod and sum intrinsics registered.

* lib.c (sum, prod): New functions.

* lib.h (sum, prod): Declared.

* txr.1: Documented.

1 files changed, 2 insertions, 0 deletions

diff --git a/eval.c b/eval.c
index 63968f35..00e65163 100644
--- a/eval.c
+++ b/eval.c
@@ -5829,6 +5829,8 @@ void eval_init(void)
   reg_fun(plus_s = intern(lit("+"), user_package), func_n0v(plusv));
   reg_fun(intern(lit("-"), user_package), func_n1v(minusv));
   reg_fun(intern(lit("*"), user_package), func_n0v(mulv));
+  reg_fun(intern(lit("sum"), user_package), func_n1(sum));
+  reg_fun(intern(lit("prod"), user_package), func_n1(prod));
   reg_fun(intern(lit("abs"), user_package), func_n1(abso));
   reg_fun(intern(lit("trunc"), user_package), func_n2o(trunc, 1));
   reg_fun(intern(lit("mod"), user_package), func_n2(mod));