update: delete default constructor

src/klotski_core/common_code/common_code.h

@@ -79,7 +79,6 @@ public:
 
 class CommonCode {
     uint64_t code_;
-    CommonCode() = default; // unsafe initialize
 
     static inline uint64_t string_decode(const std::string &common_code);
     static inline std::string string_encode(uint64_t common_code, bool shorten) noexcept;
@@ -100,6 +99,7 @@ public:
     constexpr uint64_t unwrap() const noexcept { return code_; }
 
     /// CommonCode constructors
+    CommonCode() = delete;
     explicit CommonCode(uint64_t common_code);
     explicit CommonCode(RawCode &&raw_code) noexcept;
     explicit CommonCode(ShortCode &&short_code) noexcept;

src/klotski_core/raw_code/raw_code.h

@@ -61,7 +61,6 @@ public:
 
 class RawCode {
     uint64_t code_;
-    RawCode() = default; // unsafe initialize
 
     static inline uint64_t compact(uint64_t raw_code) noexcept; // raw code -> common code
     static inline uint64_t extract(uint64_t common_code) noexcept; // common code -> raw code
@@ -86,6 +85,7 @@ public:
     constexpr uint64_t unwrap() const noexcept { return code_; }
 
     /// RawCode constructors
+    RawCode() = delete;
     explicit RawCode(uint64_t raw_code);
     explicit RawCode(CommonCode &&common_code) noexcept;
     explicit RawCode(const CommonCode &common_code) noexcept;

src/klotski_core/short_code/short_code.h

@@ -86,7 +86,6 @@ public:
 
 private:
     uint32_t code_;
-    ShortCode() = default; // unsafe initialize
 
     static Mode mode();
     static bool fast_mode_available_;
@@ -118,6 +117,7 @@ public:
     constexpr uint32_t unwrap() const noexcept { return code_; }
 
     /// ShortCode constructors
+    ShortCode() = delete;
     explicit ShortCode(uint32_t short_code);
     explicit ShortCode(std::string &&short_code);
     explicit ShortCode(CommonCode &&common_code) noexcept;