1 files changed, 50 insertions, 0 deletions
diff --git a/vere/pkg/noun/jets/f/ut_nest.c b/vere/pkg/noun/jets/f/ut_nest.c
new file mode 100644
index 0000000..9bc53bf
--- /dev/null
+++ b/vere/pkg/noun/jets/f/ut_nest.c
@@ -0,0 +1,50 @@
+/// @file
+
+#include "jets/q.h"
+#include "jets/w.h"
+
+#include "noun.h"
+
+u3_noun
+u3wfu_nest_dext(u3_noun dext_core)
+{
+  u3_noun nest_in_core, nest_core;
+  u3_noun bat, sut, ref, van, seg, reg, gil;
+
+  if (  (u3_none == (nest_in_core = u3r_at(3, dext_core)))
+     || (c3n == u3r_mean(nest_in_core, u3x_sam_2, &seg,
+                                       u3x_sam_6, &reg,
+                                       u3x_sam_7, &gil,
+                                       u3x_con, &nest_core, 0))
+     || (c3n == u3r_mean(nest_core, u3x_sam_3, &ref,
+                                    u3x_con, &van, 0))
+     || (u3_none == (bat = u3r_at(u3x_bat, van)))
+     || (u3_none == (sut = u3r_at(u3x_sam, van))) )
+  {
+    return u3m_bail(c3__fail);
+  }
+  else {
+    u3_weak vet = u3r_at(u3qfu_van_vet, van);
+    c3_m  fun_m = 141 + c3__dext + ((!!vet) << 8);
+    u3_noun key = u3z_key_3(fun_m, sut, ref, bat);
+    u3_weak pro = u3z_find(u3z_memo_toss, key);
+
+    if ( u3_none != pro ) {
+      u3z(key);
+      return pro;
+    }
+    else {
+      pro = u3n_nock_on(u3k(dext_core), u3k(u3x_at(u3x_bat, dext_core)));
+
+      if ( ((c3y == pro) && (u3_nul == reg)) ||
+           ((c3n == pro) && (u3_nul == seg)) )
+      {
+        return u3z_save(u3z_memo_toss, key, pro);
+      }
+      else {
+        u3z(key);
+        return pro;
+      }
+    }
+  }
+}