1 files changed, 54 insertions, 0 deletions
diff --git a/vere/pkg/noun/jets/f/cons.c b/vere/pkg/noun/jets/f/cons.c
new file mode 100644
index 0000000..45719c1
--- /dev/null
+++ b/vere/pkg/noun/jets/f/cons.c
@@ -0,0 +1,54 @@
+/// @file
+
+#include "jets/q.h"
+#include "jets/w.h"
+
+#include "noun.h"
+
+
+  u3_noun
+  u3qf_cons(u3_noun vur,
+            u3_noun sed)
+  {
+    u3_noun p_vur, p_sed;
+
+    if ( c3y == u3r_p(vur, 1, &p_vur) &&
+         c3y == u3r_p(sed, 1, &p_sed) ) {
+      return u3nt(1,
+                  u3k(p_vur),
+                  u3k(p_sed));
+    }
+#if 0
+    else if ( c3y == u3r_p(vur, 0, &p_vur) &&
+              c3y == u3r_p(sed, 0, &p_sed) &&
+              !(c3y == u3r_sing(1, p_vur)) &&
+              !(c3y == u3r_sing(p_vur, p_sed)) &&
+              (0 == u3r_nord(p_vur, p_sed)) )
+    {
+      u3_atom fub = u3qa_div(p_vur, 2);
+      u3_atom nof = u3qa_div(p_sed, 2);
+
+      if ( c3y == u3r_sing(fub, nof) ) {
+        u3z(nof);
+
+        return u3nc(0, fub);
+      }
+      else {
+        u3z(fub);
+        u3z(nof);
+      }
+    }
+#endif
+    return u3nc(u3k(vur), u3k(sed));
+  }
+  u3_noun
+  u3wf_cons(u3_noun cor)
+  {
+    u3_noun vur, sed;
+
+    if ( c3n == u3r_mean(cor, u3x_sam_2, &vur, u3x_sam_3, &sed, 0) ) {
+      return u3m_bail(c3__fail);
+    } else {
+      return u3qf_cons(vur, sed);
+    }
+  }