[llvm] r233159 - [ADT] Teach MapVector to support a swap member. Will be used in

[Chandler Carruth]

Author: chandlerc
Date: Tue Mar 24 19:50:21 2015
New Revision: 233159

URL: http://llvm.org/viewvc/llvm-project?rev=233159&view=rev
Log:
[ADT] Teach MapVector to support a swap member. Will be used in
a subsequent commit in Clang.

Modified:
    llvm/trunk/include/llvm/ADT/MapVector.h
    llvm/trunk/unittests/ADT/MapVectorTest.cpp

Modified: llvm/trunk/include/llvm/ADT/MapVector.h
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/include/llvm/ADT/MapVector.h?rev=233159&r1=233158&r2=233159&view=diff
==============================================================================
--- llvm/trunk/include/llvm/ADT/MapVector.h (original)
+++ llvm/trunk/include/llvm/ADT/MapVector.h Tue Mar 24 19:50:21 2015
@@ -67,6 +67,11 @@ public:
     Vector.clear();
   }
 
+  void swap(MapVector &RHS) {
+    std::swap(Map, RHS.Map);
+    std::swap(Vector, RHS.Vector);
+  }
+
   ValueT &operator[](const KeyT &Key) {
     std::pair<KeyT, unsigned> Pair = std::make_pair(Key, 0);
     std::pair<typename MapType::iterator, bool> Result = Map.insert(Pair);

Modified: llvm/trunk/unittests/ADT/MapVectorTest.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/unittests/ADT/MapVectorTest.cpp?rev=233159&r1=233158&r2=233159&view=diff
==============================================================================
--- llvm/trunk/unittests/ADT/MapVectorTest.cpp (original)
+++ llvm/trunk/unittests/ADT/MapVectorTest.cpp Tue Mar 24 19:50:21 2015
@@ -14,6 +14,31 @@
 
 using namespace llvm;
 
+TEST(MapVectorTest, swap) {
+  MapVector<int, int> MV1, MV2;
+  std::pair<MapVector<int, int>::iterator, bool> R;
+
+  R = MV1.insert(std::make_pair(1, 2));
+  ASSERT_EQ(R.first, MV1.begin());
+  EXPECT_EQ(R.first->first, 1);
+  EXPECT_EQ(R.first->second, 2);
+  EXPECT_TRUE(R.second);
+
+  EXPECT_FALSE(MV1.empty());
+  EXPECT_TRUE(MV2.empty());
+  MV2.swap(MV1);
+  EXPECT_TRUE(MV1.empty());
+  EXPECT_FALSE(MV2.empty());
+
+  auto I = MV1.find(1);
+  ASSERT_EQ(MV1.end(), I);
+
+  I = MV2.find(1);
+  ASSERT_EQ(I, MV2.begin());
+  EXPECT_EQ(I->first, 1);
+  EXPECT_EQ(I->second, 2);
+}
+
 TEST(MapVectorTest, insert_pop) {
   MapVector<int, int> MV;
   std::pair<MapVector<int, int>::iterator, bool> R;