/// @file

#include "jets/q.h"
#include "jets/w.h"

#include "noun.h"

  u3_noun
  u3qb_reel(u3_noun a,
            u3_noun b)
  {
    u3_noun pro = u3k(u3x_at(u3x_sam_3, b));

    if ( u3_nul != a ) {
      u3a_pile pil_u;
      u3j_site sit_u;
      u3_noun*   top;
      u3_noun   i, t = a;

      u3a_pile_prep(&pil_u, sizeof(u3_noun));

      //  push list onto road stack
      //
      do {
        u3x_cell(t, &i, &t);
        top  = u3a_push(&pil_u);
        *top = u3k(i);
      } while ( u3_nul != t );

      u3j_gate_prep(&sit_u, u3k(b));

      while ( c3n == u3a_pile_done(&pil_u) ) {
        pro = u3j_gate_slam(&sit_u, u3nc(*top, pro));
        top = u3a_pop(&pil_u);
      }

      u3j_gate_lose(&sit_u);
    }

    return pro;
  }
  u3_noun
  u3wb_reel(u3_noun cor)
  {
    u3_noun a, b;

    if ( c3n == u3r_mean(cor, u3x_sam_2, &a, u3x_sam_3, &b, 0) ) {
      return u3m_bail(c3__exit);
    } else {
      return u3qb_reel(a, b);
    }
  }