New function: isecp.

* eval.c (eval_init): Register isecp intrinsic.

* lib.c (isecp): New function.

* lib.h (isecp): Declared.

* stdlib/compiler.tl (lambda-apply-transform,
dump-compiled-objects): Use isecp instead of isec, since the
actual intersection of symbols isn't needed, only whether it
exists.

* txr.1: Documented.

* stdlib/doc-syms.tl: Updated.

1 files changed, 1 insertions, 0 deletions

diff --git a/eval.c b/eval.c
index a1fc263a..ed3c88f7 100644
--- a/eval.c
+++ b/eval.c
@@ -7350,6 +7350,7 @@ void eval_init(void)
   reg_fun(intern(lit("diff"), user_package), func_n4o(diff, 2));
   reg_fun(intern(lit("symdiff"), user_package), func_n4o(symdiff, 2));
   reg_fun(intern(lit("isec"), user_package), func_n4o(isec, 2));
+  reg_fun(intern(lit("isecp"), user_package), func_n4o(isecp, 2));
   reg_fun(intern(lit("uni"), user_package), func_n4o(uni, 2));
 
   reg_fun(intern(lit("seqp"), user_package), func_n1(seqp));