From f674f353eee112692d83f39cb1f07f1cbb25380a Mon Sep 17 00:00:00 2001
From: dim <dim@FreeBSD.org>
Date: Mon, 17 Mar 2014 20:42:45 +0000
Subject: MFC r263120:

Pull in r201021 from upstream libc++ trunk:

  Fix for PR18735 - self-assignment for map/multimap gives incorrect
  results in C++03

(Please note: that is an LLVM PR identifier, not a FreeBSD one.)

Reported by:	rakuco
---
 contrib/libc++/include/map           | 20 ++++++++++++--------
 contrib/libc++/include/unordered_map | 28 ++++++++++++++++------------
 2 files changed, 28 insertions(+), 20 deletions(-)

(limited to 'contrib/libc++')

diff --git a/contrib/libc++/include/map b/contrib/libc++/include/map
index 009e8e2..9779b70 100644
--- a/contrib/libc++/include/map
+++ b/contrib/libc++/include/map
@@ -884,10 +884,12 @@ public:
 #if __cplusplus >= 201103L
             __tree_ = __m.__tree_;
 #else
-            __tree_.clear();
-            __tree_.value_comp() = __m.__tree_.value_comp();
-            __tree_.__copy_assign_alloc(__m.__tree_);
-            insert(__m.begin(), __m.end());
+            if (this != &__m) {
+                __tree_.clear();
+                __tree_.value_comp() = __m.__tree_.value_comp();
+                __tree_.__copy_assign_alloc(__m.__tree_);
+                insert(__m.begin(), __m.end());
+            }
 #endif
             return *this;
         }
@@ -1616,10 +1618,12 @@ public:
 #if __cplusplus >= 201103L
             __tree_ = __m.__tree_;
 #else
-            __tree_.clear();
-            __tree_.value_comp() = __m.__tree_.value_comp();
-            __tree_.__copy_assign_alloc(__m.__tree_);
-            insert(__m.begin(), __m.end());
+            if (this != &__m) {
+                __tree_.clear();
+                __tree_.value_comp() = __m.__tree_.value_comp();
+                __tree_.__copy_assign_alloc(__m.__tree_);
+                insert(__m.begin(), __m.end());
+            }
 #endif
             return *this;
         }
diff --git a/contrib/libc++/include/unordered_map b/contrib/libc++/include/unordered_map
index 78fee48..4e2298b 100644
--- a/contrib/libc++/include/unordered_map
+++ b/contrib/libc++/include/unordered_map
@@ -831,12 +831,14 @@ public:
 #if __cplusplus >= 201103L
         __table_ = __u.__table_;
 #else
-        __table_.clear();
-        __table_.hash_function() = __u.__table_.hash_function();
-        __table_.key_eq() = __u.__table_.key_eq();
-        __table_.max_load_factor() = __u.__table_.max_load_factor();
-        __table_.__copy_assign_alloc(__u.__table_);
-        insert(__u.begin(), __u.end());
+        if (this != &__u) {
+            __table_.clear();
+            __table_.hash_function() = __u.__table_.hash_function();
+            __table_.key_eq() = __u.__table_.key_eq();
+            __table_.max_load_factor() = __u.__table_.max_load_factor();
+            __table_.__copy_assign_alloc(__u.__table_);
+            insert(__u.begin(), __u.end());
+        }
 #endif
         return *this;
     }
@@ -1567,12 +1569,14 @@ public:
 #if __cplusplus >= 201103L
         __table_ = __u.__table_;
 #else
-        __table_.clear();
-        __table_.hash_function() = __u.__table_.hash_function();
-        __table_.key_eq() = __u.__table_.key_eq();
-        __table_.max_load_factor() = __u.__table_.max_load_factor();
-        __table_.__copy_assign_alloc(__u.__table_);
-        insert(__u.begin(), __u.end());
+        if (this != &__u) {
+            __table_.clear();
+            __table_.hash_function() = __u.__table_.hash_function();
+            __table_.key_eq() = __u.__table_.key_eq();
+            __table_.max_load_factor() = __u.__table_.max_load_factor();
+            __table_.__copy_assign_alloc(__u.__table_);
+            insert(__u.begin(), __u.end());
+        }
 #endif
         return *this;
     }
-- 
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