From b3d17aea53f4f2176b9c2cbfcb20dafc6c6294b3 Mon Sep 17 00:00:00 2001
From: Sergey Lyskov <3302736+lyskov@users.noreply.github.com>
Date: Wed, 13 May 2026 13:36:25 -0600
Subject: [PATCH] Revert "Revert "Apply Rule of Zero to utility/keys container
 family" (#703)"

This reverts commit b2a0ff32f3ee01822f6f18b9d21ea27357a5f6bc.
---
 source/src/utility/keys/ClassKeyMap.hh    | 30 -----------------------
 source/src/utility/keys/ClassKeyVector.hh | 30 -----------------------
 source/src/utility/keys/KeyVector.hh      | 24 ------------------
 source/src/utility/keys/SmallKeyMap.hh    | 28 ---------------------
 source/src/utility/keys/SmallKeyVector.hh | 28 ---------------------
 5 files changed, 140 deletions(-)

diff --git a/source/src/utility/keys/ClassKeyMap.hh b/source/src/utility/keys/ClassKeyMap.hh
index b7ebd7b7932..361d8104870 100644
--- a/source/src/utility/keys/ClassKeyMap.hh
+++ b/source/src/utility/keys/ClassKeyMap.hh
@@ -108,19 +108,6 @@ public: // Types
 public: // Creation
 
 
-	/// @brief Default constructor
-	inline
-	ClassKeyMap()
-	= default;
-
-
-	/// @brief Copy constructor
-	inline
-	ClassKeyMap( ClassKeyMap const & a ) :
-		v_( a.v_ )
-	{}
-
-
 	/// @brief Iterator range constructor
 	template< typename InputIterator >
 	inline
@@ -136,26 +123,9 @@ public: // Creation
 	}
 
 
-	/// @brief Destructor
-	inline
-	~ClassKeyMap() {}
-
-
 public: // Assignment
 
 
-	/// @brief Copy assignment
-	inline
-	ClassKeyMap &
-	operator =( ClassKeyMap const & a )
-	{
-		if ( this != &a ) {
-			v_ = a.v_;
-		}
-		return *this;
-	}
-
-
 	/// @brief Uniform value assignment to current elements
 	inline
 	ClassKeyMap &
diff --git a/source/src/utility/keys/ClassKeyVector.hh b/source/src/utility/keys/ClassKeyVector.hh
index 8fbf2d09274..a4fa238bc00 100644
--- a/source/src/utility/keys/ClassKeyVector.hh
+++ b/source/src/utility/keys/ClassKeyVector.hh
@@ -98,19 +98,6 @@ public: // Types
 public: // Creation
 
 
-	/// @brief Default constructor
-	inline
-	ClassKeyVector()
-	= default;
-
-
-	/// @brief Copy constructor
-	inline
-	ClassKeyVector( ClassKeyVector const & a ) :
-		v_( a.v_ )
-	{}
-
-
 	/// @brief Size constructor
 	inline
 	explicit
@@ -140,26 +127,9 @@ public: // Creation
 	{}
 
 
-	/// @brief Destructor
-	inline
-	~ClassKeyVector() {}
-
-
 public: // Assignment
 
 
-	/// @brief Copy assignment
-	inline
-	ClassKeyVector &
-	operator =( ClassKeyVector const & a )
-	{
-		if ( this != &a ) {
-			v_ = a.v_;
-		}
-		return *this;
-	}
-
-
 	/// @brief Uniform value assignment to current elements
 	inline
 	ClassKeyVector &
diff --git a/source/src/utility/keys/KeyVector.hh b/source/src/utility/keys/KeyVector.hh
index 8c410b23b80..b98556c05ad 100644
--- a/source/src/utility/keys/KeyVector.hh
+++ b/source/src/utility/keys/KeyVector.hh
@@ -89,12 +89,6 @@ public: // Types
 public: // Creation
 
 
-	/// @brief Default constructor
-	inline
-	KeyVector()
-	= default;
-
-
 	/// @brief Size constructor
 	inline
 	explicit
@@ -124,27 +118,9 @@ public: // Creation
 	{}
 
 
-	/// @brief Destructor
-	inline
-	~KeyVector()
-	= default;
-
-
 public: // Assignment
 
 
-	/// @brief Copy assignment
-	inline
-	KeyVector &
-	operator =( KeyVector const & a )
-	{
-		if ( this != &a ) {
-			v_ = a.v_;
-		}
-		return *this;
-	}
-
-
 	/// @brief Uniform value assignment to elements
 	inline
 	KeyVector &
diff --git a/source/src/utility/keys/SmallKeyMap.hh b/source/src/utility/keys/SmallKeyMap.hh
index 77d689fef7a..5bb9015ff33 100644
--- a/source/src/utility/keys/SmallKeyMap.hh
+++ b/source/src/utility/keys/SmallKeyMap.hh
@@ -111,15 +111,6 @@ public: // Creation
 	{}
 
 
-	/// @brief Copy constructor
-	inline
-	SmallKeyMap( SmallKeyMap const & a ) :
-		v_( a.v_ ),
-		m_( a.m_ ),
-		u_( a.u_ )
-	{}
-
-
 	/// @brief Iterator range constructor
 	template< typename InputIterator >
 	inline
@@ -136,28 +127,9 @@ public: // Creation
 	}
 
 
-	/// @brief Destructor
-	inline
-	~SmallKeyMap() {}
-
-
 public: // Assignment
 
 
-	/// @brief Copy assignment
-	inline
-	SmallKeyMap &
-	operator =( SmallKeyMap const & a )
-	{
-		if ( this != &a ) {
-			v_ = a.v_;
-			m_ = a.m_;
-			u_ = a.u_;
-		}
-		return *this;
-	}
-
-
 	/// @brief Uniform mapped value assignment to current elements
 	inline
 	SmallKeyMap &
diff --git a/source/src/utility/keys/SmallKeyVector.hh b/source/src/utility/keys/SmallKeyVector.hh
index 1eb861a60ef..309ba631052 100644
--- a/source/src/utility/keys/SmallKeyVector.hh
+++ b/source/src/utility/keys/SmallKeyVector.hh
@@ -105,15 +105,6 @@ public: // Creation
 	{}
 
 
-	/// @brief Copy constructor
-	inline
-	SmallKeyVector( SmallKeyVector const & a ) :
-		v_( a.v_ ),
-		m_( a.m_ ),
-		u_( a.u_ )
-	{}
-
-
 	/// @brief Size constructor
 	inline
 	explicit
@@ -146,28 +137,9 @@ public: // Creation
 	{}
 
 
-	/// @brief Destructor
-	inline
-	~SmallKeyVector() {}
-
-
 public: // Assignment
 
 
-	/// @brief Copy assignment
-	inline
-	SmallKeyVector &
-	operator =( SmallKeyVector const & a )
-	{
-		if ( this != &a ) {
-			v_ = a.v_;
-			m_ = a.m_;
-			u_ = a.u_;
-		}
-		return *this;
-	}
-
-
 	/// @brief Uniform value assignment to current elements
 	inline
 	SmallKeyVector &