introduce bitloops

src/main/java/puzzle/Export.java

@@ -4,7 +4,8 @@ import module java.base;
 import lombok.AllArgsConstructor;
 import lombok.experimental.Delegate;
 import lombok.val;
-import puzzle.Export.Gridded.Replacar.Cell;
+import precomp.Const9x8.Cell;
+import puzzle.Export.Gridded.Replacar.Rell;
 import puzzle.Export.LetterVisit.LetterAt;
 import puzzle.Masker.Clues;
 import puzzle.SwedishGenerator.FillResult;
@@ -69,6 +70,11 @@ public record Export() {
    
    public record Clued(@Delegate Clues c) {
       
+      public static Clues create(Cell... cell) {
+         var empty = createEmpty();
+         for (var cell1 : cell) empty.setClue(cell1);
+         return empty;
+      }
       public Clued deepCopyGrid() { return new Clued(new Clues(c.lo, c.hi, c.vlo, c.vhi, c.rlo, c.rhi, c.xlo, c.xhi)); }
       public static Clued parse(String s) {
          var c     = createEmpty();
@@ -160,7 +166,7 @@ public record Export() {
             val r   = idx & 7;
             val c   = idx >>> 3;
             val dir = Slot.dir(s);
-            sb.setCharAt(r * (C + 1) + c, clueChar.replace(new Cell(grid, clues, idx, (byte) (dir | 48))));
+            sb.setCharAt(r * (C + 1) + c, clueChar.replace(new Rell(grid, clues, idx, (byte) (dir | 48))));
          });
          stream(clues).forEach((l) -> sb.setCharAt(l.index(C + 1), l.human()));
          return sb.toString().replaceAll(" ", "" + emptyFallback).split("\n");
@@ -217,8 +223,8 @@ public record Export() {
       @FunctionalInterface
       interface Replacar {
          
-         record Cell(Grid grid, Clues clues, int index, byte data) { }
-         char replace(Cell c);
+         record Rell(Grid grid, Clues clues, int index, byte data) { }
+         char replace(Rell c);
       }
       
    }

src/main/java/puzzle/Masker.java

@@ -653,6 +653,12 @@ public final class Masker {
          return validSlotRev(lo, hi, key);
       }
       
+      public Clues setClue(precomp.Const9x8.Cell cell) {
+         if (cell.index < 64) setClueLo(cell.mask, cell.d);
+         else setClueHi(cell.mask, cell.d);
+         return this;
+      }
+      
       public void setClueLo(long mask, byte idx) {
          lo |= mask;
          if ((idx & 1) != 0) vlo |= mask;