proper constructor for hanabi state

game_state.h

@@ -90,6 +90,8 @@ struct CardMultiplicity {
 
 template <std::size_t num_suits> struct CardPositions {
 
+    CardPositions();
+
     const player_t &operator[](const Card &card) const;
 
     player_t &operator[](const Card &card);
@@ -97,10 +99,7 @@ template <std::size_t num_suits> struct CardPositions {
     auto operator<=>(const CardPositions &) const = default;
 
 private:
-  std::array<
+    std::array<std::array<std::array<player_t, max_card_duplicity>, starting_card_rank>, num_suits> _card_positions;
-      std::array<std::array<player_t, max_card_duplicity>, starting_card_rank>,
-      num_suits>
-      _card_positions;
 };
 
 enum class ActionType { discard, clue, play };
@@ -111,11 +110,14 @@ struct Action {
   std::uint8_t index{};
 };
 
-template <std::size_t num_suits, std::size_t num_players, std::size_t hand_size,
+template <std::size_t num_suits, player_t num_players, std::size_t hand_size, std::uint8_t max_draw_pile_size>
-          std::uint8_t max_draw_pile_size>
 class HanabiState {
 public:
+    HanabiState() = default;
+    explicit HanabiState(const std::vector<Card>& deck);
+
     Action clue();
+
     /**
      * Plays a card from current hand, drawing top card of draw pile and rotating draw pile
      * @param index of card in hand to be played
@@ -127,16 +129,18 @@ public:
     void revert(const Action &action);
 
     void draw(std::uint8_t index);
+
     void revert_draw(std::uint8_t index, Card card);
+
     void incr_turn();
+
     void decr_turn();
 
     player_t _turn{};
     clue_t _num_clues{};
     std::uint8_t _draw_pile_size{};
     Stacks<num_suits> _stacks{};
-  std::array<boost::container::static_vector<Card, hand_size>, num_players>
+    std::array<boost::container::static_vector<Card, hand_size>, num_players> _hands{};
-      _hands{};
     CardPositions<num_suits> _card_positions{};
     std::list<CardMultiplicity> _draw_pile{};
 
@@ -146,13 +150,8 @@ public:
     auto operator<=>(const HanabiState &) const = default;
 };
 
-template <std::size_t num_suits, std::size_t num_players, std::size_t hand_size,
+template <std::size_t num_suits, player_t num_players, std::size_t hand_size, std::uint8_t max_draw_pile_size>
-          std::uint8_t max_draw_pile_size>
+std::ostream & operator<<(std::ostream &os, HanabiState<num_suits, num_players, hand_size, max_draw_pile_size> hanabi_state);
-std::ostream &
-operator<<(std::ostream &os,
-           HanabiState<num_suits, num_players, hand_size, max_draw_pile_size>
-               hanabi_state);
-
 
 template class HanabiState<5, 3, 4, 20>;
 

game_state.hpp

@@ -26,6 +26,15 @@ namespace Hanabi {
         return os;
     }
 
+    template<std::size_t num_suits>
+    CardPositions<num_suits>::CardPositions() {
+        for(size_t suit = 0; suit < num_suits; suit++) {
+            for(rank_t rank = 0; rank < starting_card_rank; rank++) {
+                std::ranges::fill(_card_positions[suit][rank], draw_pile);
+            }
+        }
+    }
+
     template<std::size_t num_suits>
     const player_t &CardPositions<num_suits>::operator[](const Card &card) const {
         return _card_positions[card.suit][card.rank][card.copy];
@@ -36,7 +45,29 @@ namespace Hanabi {
         return _card_positions[card.suit][card.rank][card.copy];
     };
 
-    template<size_t num_suits, size_t num_players, size_t hand_size, uint8_t max_draw_pile_size>
+    template<size_t num_suits, player_t num_players, size_t hand_size, uint8_t max_draw_pile_size>
+    HanabiState<num_suits, num_players, hand_size, max_draw_pile_size>::HanabiState(const std::vector<Card> &deck):
+    _turn(0),
+    _num_clues(max_num_clues),
+    _draw_pile_size(deck.size() - num_players * hand_size),
+    _stacks(),
+    _hands(),
+    _card_positions(),
+    _draw_pile() {
+        std::ranges::fill(_stacks, starting_card_rank);
+        for(const Card& card: deck) {
+            _draw_pile.push_back({card, 1});
+        }
+        for(player_t player = 0; player < num_players; player++) {
+            for(std::uint8_t index = 0; index < hand_size; index++) {
+                draw(index);
+            }
+            incr_turn();
+        }
+        assert(_turn == 0);
+    }
+
+    template<size_t num_suits, player_t num_players, size_t hand_size, uint8_t max_draw_pile_size>
     Action HanabiState<num_suits, num_players, hand_size, max_draw_pile_size>::clue() {
         assert(_num_clues > 0);
         --_num_clues;
@@ -46,19 +77,19 @@ namespace Hanabi {
         return Action{ActionType::clue, {}, {}};
     }
 
-    template<size_t num_suits, size_t num_players, size_t hand_size, uint8_t max_draw_pile_size>
+    template<size_t num_suits, player_t num_players, size_t hand_size, uint8_t max_draw_pile_size>
     void HanabiState<num_suits, num_players, hand_size,
             max_draw_pile_size>::incr_turn() {
         _turn = (_turn + 1) % num_players;
     }
 
-    template<size_t num_suits, size_t num_players, size_t hand_size, uint8_t max_draw_pile_size>
+    template<size_t num_suits, player_t num_players, size_t hand_size, uint8_t max_draw_pile_size>
     void HanabiState<num_suits, num_players, hand_size,
             max_draw_pile_size>::decr_turn() {
         _turn = (_turn + num_players - 1) % num_players;
     }
 
-    template<std::size_t num_suits, std::size_t num_players, std::size_t hand_size, uint8_t max_draw_pile_size>
+    template<std::size_t num_suits, player_t num_players, std::size_t hand_size, uint8_t max_draw_pile_size>
     Action HanabiState<num_suits, num_players, hand_size, max_draw_pile_size>::play(
             std::uint8_t index) {
         assert(index < _hands[_turn].size());
@@ -80,7 +111,7 @@ namespace Hanabi {
         return ret;
     }
 
-    template<std::size_t num_suits, std::size_t num_players, std::size_t hand_size, uint8_t max_draw_pile_size>
+    template<std::size_t num_suits, player_t num_players, std::size_t hand_size, uint8_t max_draw_pile_size>
     Action HanabiState<num_suits, num_players, hand_size, max_draw_pile_size>::discard(
             std::uint8_t index) {
         assert(index < _hands[_turn].size());
@@ -96,7 +127,7 @@ namespace Hanabi {
         return ret;
     }
 
-    template<std::size_t num_suits, std::size_t num_players, std::size_t hand_size, uint8_t max_draw_pile_size>
+    template<std::size_t num_suits, player_t num_players, std::size_t hand_size, uint8_t max_draw_pile_size>
     std::ostream &operator<<(std::ostream &os, const HanabiState<num_suits, num_players, hand_size, max_draw_pile_size> hanabi_state) {
         os << "Stacks: " << hanabi_state._stacks << std::endl;
         os << "Draw pile: ";
@@ -117,7 +148,7 @@ namespace Hanabi {
         return os;
     }
 
-    template<std::size_t num_suits, std::size_t num_players, std::size_t hand_size, uint8_t max_draw_pile_size>
+    template<std::size_t num_suits, player_t num_players, std::size_t hand_size, uint8_t max_draw_pile_size>
     void HanabiState<num_suits, num_players, hand_size, max_draw_pile_size>::draw(std::uint8_t index) {
         assert(index < _hands[_turn].size());
 
@@ -138,7 +169,7 @@ namespace Hanabi {
         }
     }
 
-    template<std::size_t num_suits, std::size_t num_players, std::size_t hand_size, uint8_t max_draw_pile_size>
+    template<std::size_t num_suits, player_t num_players, std::size_t hand_size, uint8_t max_draw_pile_size>
     void HanabiState<num_suits, num_players, hand_size, max_draw_pile_size>::revert_draw(std::uint8_t index, Card card) {
         assert(index < _hands[_turn].size());
 
@@ -156,7 +187,7 @@ namespace Hanabi {
         _draw_pile_size++;
     }
 
-    template<std::size_t num_suits, std::size_t num_players, std::size_t hand_size, uint8_t max_draw_pile_size>
+    template<std::size_t num_suits, player_t num_players, std::size_t hand_size, uint8_t max_draw_pile_size>
     void HanabiState<num_suits, num_players, hand_size, max_draw_pile_size>::revert(
             const Action &action) {
         decr_turn();

main.cpp

@@ -21,8 +21,8 @@ void test_game() {
   state._draw_pile.push_back({r41, 1});
   state._hands[0] = {y0, y1, y2, r0, r1};
   state._hands[1] = {r1, r1, y1, r3, r2};
+  state._card_positions[r1] = 0;
   state._draw_pile_size = 1;
-  state._card_positions[r41] = draw_pile;
 
   auto state2 = state;