Add .clang-format and apply it

2020/puzzle-22-02.cc

@@ -15,8 +15,10 @@ using Cards = std::list<Card>;
 using Score = unsigned long;
 using Hash = std::string;
 
-struct Player {
-  Player(std::istream &is) {
+struct Player
+{
+  Player(std::istream& is)
+  {
     std::string line;
     if (!std::getline(is, name_)) {
       assert(false);
@@ -35,7 +37,8 @@ struct Player {
   void push_back(Card c) { cards_.push_back(c); }
   std::size_t size() const { return cards_.size(); }
 
-  Score score() const {
+  Score score() const
+  {
     Score r = 0;
     unsigned idx = 1;
     for (auto it = cards_.rbegin(); it != cards_.rend(); ++it) {
@@ -45,7 +48,8 @@ struct Player {
     return r;
   }
 
-  Hash hash() const {
+  Hash hash() const
+  {
     std::string r = name_;
     for (auto c : cards_) {
       assert(c > 0);
@@ -56,21 +60,23 @@ struct Player {
     return r;
   }
 
-  Player(Player const &prev, Card size) : name_(prev.name_ + "-") {
+  Player(Player const& prev, Card size) : name_(prev.name_ + "-")
+  {
     auto it = prev.cards_.begin();
     for (Card i = 0; i < size; ++i) {
       cards_.push_back(*it++);
     }
   }
 
-  friend std::ostream &operator<<(std::ostream &os, Player const &p);
+  friend std::ostream& operator<<(std::ostream& os, Player const& p);
 
 private:
   std::string name_;
   Cards cards_;
 };
 
-std::ostream &operator<<(std::ostream &os, Player const &p) {
+std::ostream& operator<<(std::ostream& os, Player const& p)
+{
   os << p.name_;
   for (auto c : p.cards_) {
     os << " " << c;
@@ -79,7 +85,8 @@ std::ostream &operator<<(std::ostream &os, Player const &p) {
 }
 
 // False = p1 wins, true = p2 wins.
-bool play_game(Player &p1, Player &p2) {
+bool play_game(Player& p1, Player& p2)
+{
   std::set<Hash> hashes;
 
   while (!p1.empty() && !p2.empty()) {
@@ -100,17 +107,21 @@ bool play_game(Player &p1, Player &p2) {
       if (!result) {
         p1.push_back(c1);
         p1.push_back(c2);
-      } else {
+      }
+      else {
         p2.push_back(c2);
         p2.push_back(c1);
       }
-    } else if (c1 > c2) {
+    }
+    else if (c1 > c2) {
       p1.push_back(c1);
       p1.push_back(c2);
-    } else if (c1 < c2) {
+    }
+    else if (c1 < c2) {
       p2.push_back(c2);
       p2.push_back(c1);
-    } else {
+    }
+    else {
       assert(false);
     }
   }
@@ -118,7 +129,8 @@ bool play_game(Player &p1, Player &p2) {
   return p1.empty();
 }
 
-int main(void) {
+int main(void)
+{
   Player player1(std::cin);
   Player player2(std::cin);