update: header file of Group

src/core/group/group.h

@@ -191,6 +191,7 @@ private:
     [[nodiscard]] uint32_t flat_id() const;
 
 public:
+    /// Spawn all the unsorted codes of the current group.
     static std::vector<codec::RawCode> extend(codec::RawCode raw_code, uint32_t reserve = 0);
 };
 
@@ -204,9 +205,15 @@ public:
         // TODO: should we keep it valid? (convert without check)
     };
 
+    /// Execute the build process.
     void build();
 
-	void build_async(Executor &&executor, Notifier &&notifier);
+    /// Execute the build process without blocking.
+    void build_async(Executor &&executor, Notifier &&callback);
+
+    static info_t to_info_t(codec::ShortCode short_code);
+
+    static codec::CommonCode from_info_t(info_t info);
 
     /// Get the CommonCode using the group info.
     // static codec::CommonCode parse(const info_t &info);
@@ -215,10 +222,6 @@ public:
     // static info_t encode(const codec::RawCode &raw_code);
     // static info_t encode(const codec::CommonCode &common_code);
 
-	static info_t to_info_t(codec::ShortCode short_code);
-
-	static codec::CommonCode from_info_t(info_t info);
-
 private:
     bool available_ = false;
     std::mutex building_ {};

src/core/group/internal/group_cases.cc

@@ -1,4 +1,5 @@
 #include <iostream>
+#include <algorithm>
 
 #include "group/group.h"