From 8e9b7cf2598773013db2b6e7d3b8d9d6dd4418da Mon Sep 17 00:00:00 2001
From: Christian Mazakas <christian.mazakas@gmail.com>
Date: Tue, 4 Oct 2022 14:51:45 -0700
Subject: [PATCH] Add move semantics to FOA containers

---
 .../boost/unordered/unordered_flat_map.hpp    | 23 +++++++++++++++++++
 .../boost/unordered/unordered_flat_set.hpp    | 23 +++++++++++++++++++
 2 files changed, 46 insertions(+)

diff --git a/include/boost/unordered/unordered_flat_map.hpp b/include/boost/unordered/unordered_flat_map.hpp
index c7b0b3ec..2add8d34 100644
--- a/include/boost/unordered/unordered_flat_map.hpp
+++ b/include/boost/unordered/unordered_flat_map.hpp
@@ -89,6 +89,19 @@ namespace boost {
       {
       }
 
+      unordered_flat_map(unordered_flat_map&& other)
+        noexcept(std::is_nothrow_move_constructible<hasher>::value&&
+            std::is_nothrow_move_constructible<key_equal>::value&&
+              std::is_nothrow_move_constructible<allocator_type>::value)
+          : table_(std::move(other.table_))
+      {
+      }
+
+      unordered_flat_map(unordered_flat_map&& other, allocator_type const& al)
+          : table_(std::move(other.table_), al)
+      {
+      }
+
       unordered_flat_map(std::initializer_list<value_type> ilist,
         size_type n = 0, hasher const& h = hasher(),
         key_equal const& pred = key_equal(),
@@ -105,6 +118,16 @@ namespace boost {
         return *this;
       }
 
+      unordered_flat_map& operator=(unordered_flat_map&& other)
+        noexcept(std::allocator_traits<allocator_type>::is_always_equal::value&&
+            std::is_nothrow_move_assignable<hasher>::value&&
+              std::is_nothrow_move_assignable<key_equal>::value)
+      {
+        table_ = std::move(other.table_);
+        return *this;
+      }
+
+
       allocator_type get_allocator() const noexcept
       {
         return table_.get_allocator();
diff --git a/include/boost/unordered/unordered_flat_set.hpp b/include/boost/unordered/unordered_flat_set.hpp
index b1caed49..1ac629f0 100644
--- a/include/boost/unordered/unordered_flat_set.hpp
+++ b/include/boost/unordered/unordered_flat_set.hpp
@@ -88,6 +88,19 @@ namespace boost {
       {
       }
 
+      unordered_flat_set(unordered_flat_set&& other)
+        noexcept(std::is_nothrow_move_constructible<hasher>::value&&
+            std::is_nothrow_move_constructible<key_equal>::value&&
+              std::is_nothrow_move_constructible<allocator_type>::value)
+          : table_(std::move(other.table_))
+      {
+      }
+
+      unordered_flat_set(unordered_flat_set&& other, allocator_type const& al)
+          : table_(std::move(other.table_), al)
+      {
+      }
+
       unordered_flat_set(std::initializer_list<value_type> ilist,
         size_type n = 0, hasher const& h = hasher(),
         key_equal const& pred = key_equal(),
@@ -104,6 +117,16 @@ namespace boost {
         return *this;
       }
 
+      unordered_flat_set& operator=(unordered_flat_set&& other)
+        noexcept(std::allocator_traits<allocator_type>::is_always_equal::value&&
+            std::is_nothrow_move_assignable<hasher>::value&&
+              std::is_nothrow_move_assignable<key_equal>::value)
+      {
+        table_ = std::move(other.table_);
+        return *this;
+      }
+
+
       allocator_type get_allocator() const noexcept
       {
         return table_.get_allocator();