Fix non-exhaustiveness warnings using IllegalArgumentException

Author: sim642

src/main/scala/eu/sim642/adventofcode2019/Day13.scala

@@ -16,6 +16,8 @@ object Day13 {
       case (acc, LazyList(x, y, tile)) =>
         val pos = Pos(x.toInt, y.toInt)
         acc + (pos -> tile.toInt)
+      case (_, _) =>
+        throw new IllegalArgumentException("incomplete output")
     })
   }
 

src/main/scala/eu/sim642/adventofcode2022/Day22.scala

@@ -85,6 +85,7 @@ object Day22 {
           case Pos(0, 1) => Pos(pos.x, mapTranspose(pos.x).indexWhere(_ != ' '))
           case Pos(-1, 0) => Pos(map(pos.y).lastIndexWhere(_ != ' '), pos.y)
           case Pos(0, -1) => Pos(pos.x, mapTranspose(pos.x).lastIndexWhere(_ != ' '))
+          case _ => throw new IllegalArgumentException("illegal facing")
         }
         PosFacing(newPos, facing)
       }
@@ -120,6 +121,7 @@ object Day22 {
       case Pos(0, 1) => Pos(edgeLength - 1, edgeLength - 1)
       case Pos(-1, 0) => Pos(0, edgeLength - 1)
       case Pos(0, -1) => Pos(0, 0)
+      case _ => throw new IllegalArgumentException("illegal edge")
     }
 
     def wrap(posFacing: PosFacing): PosFacing = {

src/main/scala/eu/sim642/adventofcode2023/Day8.scala

@@ -15,6 +15,7 @@ object Day8 {
     instructions.cycle.scanLeft(startNode)({
       case (node, 'L') => network(node)._1
       case (node, 'R') => network(node)._2
+      case _ => throw new IllegalArgumentException("illegal instruction")
     })
   }