More work on client and server

luprex/core/cpp/util.hpp

@@ -94,6 +94,14 @@ std::string trim(std::string s);
 // Calculate distance between two points
 double distance_squared(double x1, double y1, double x2, double y2);
 
+// Remove nullptrs from a vector of unique pointers.
+template<class T>
+void remove_nullptrs(std::vector<std::unique_ptr<T>> &vec) {
+    std::unique_ptr<T> nullp;
+    auto iter = std::remove(vec.begin(), vec.end(), nullp);
+    vec.erase(iter, vec.end());
+}
+
 // Read the lua source code from the specified directory.
 LuaSourcePtr read_lua_source(const std::string &directory);