Bring the return value of SmallVector::insert in line with std::vector::insert.

It always returns the iterator for the first inserted element, or the passed in
iterator if the inserted range was empty. Flesh out the unit test more and fix
all the cases it uncovered so far.

llvm-svn: 158645

1 files changed, 30 insertions, 4 deletions

diff --git a/llvm/unittests/ADT/SmallVectorTest.cpp b/llvm/unittests/ADT/SmallVectorTest.cpp
index 8f6d2f4..d35e5bc 100644
--- a/llvm/unittests/ADT/SmallVectorTest.cpp
+++ b/llvm/unittests/ADT/SmallVectorTest.cpp
@@ -342,7 +342,9 @@ TEST_F(SmallVectorTest, InsertTest) {
   SCOPED_TRACE("InsertTest");
 
   makeSequence(theVector, 1, 3);
-  theVector.insert(theVector.begin() + 1, Constructable(77));
+  VectorType::iterator I =
+    theVector.insert(theVector.begin() + 1, Constructable(77));
+  EXPECT_EQ(theVector.begin() + 1, I);
   assertValuesInOrder(theVector, 4u, 1, 77, 2, 3);
 }
 
@@ -351,24 +353,48 @@ TEST_F(SmallVectorTest, InsertRepeatedTest) {
   SCOPED_TRACE("InsertRepeatedTest");
 
   makeSequence(theVector, 10, 15);
-  theVector.insert(theVector.begin() + 1, 2, Constructable(16));
+  VectorType::iterator I =
+    theVector.insert(theVector.begin() + 1, 2, Constructable(16));
+  EXPECT_EQ(theVector.begin() + 1, I);
   assertValuesInOrder(theVector, 8u, 10, 16, 16, 11, 12, 13, 14, 15);
 
+  // Insert at end.
+  I = theVector.insert(theVector.end(), 2, Constructable(16));
+  EXPECT_EQ(theVector.begin() + 8, I);
+  assertValuesInOrder(theVector, 10u, 10, 16, 16, 11, 12, 13, 14, 15, 16, 16);
+
+  // Empty insert.
   EXPECT_EQ(theVector.end(),
             theVector.insert(theVector.end(), 0, Constructable(42)));
+  EXPECT_EQ(theVector.begin() + 1,
+            theVector.insert(theVector.begin() + 1, 0, Constructable(42)));
 }
 
 // Insert range.
 TEST_F(SmallVectorTest, InsertRangeTest) {
-  SCOPED_TRACE("InsertRepeatedTest");
+  SCOPED_TRACE("InsertRangeTest");
+
+  Constructable Arr[3] =
+    { Constructable(77), Constructable(77), Constructable(77) };
 
   makeSequence(theVector, 1, 3);
-  theVector.insert(theVector.begin() + 1, 3, Constructable(77));
+  VectorType::iterator I =
+    theVector.insert(theVector.begin() + 1, Arr, Arr+3);
+  EXPECT_EQ(theVector.begin() + 1, I);
   assertValuesInOrder(theVector, 6u, 1, 77, 77, 77, 2, 3);
 
+  // Insert at end.
+  I = theVector.insert(theVector.end(), Arr, Arr+3);
+  EXPECT_EQ(theVector.begin() + 6, I);
+  assertValuesInOrder(theVector, 9u, 1, 77, 77, 77, 2, 3, 77, 77, 77);
+
+  // Empty insert.
   EXPECT_EQ(theVector.end(), theVector.insert(theVector.end(),
                                               theVector.begin(),
                                               theVector.begin()));
+  EXPECT_EQ(theVector.begin() + 1, theVector.insert(theVector.begin() + 1,
+                                                    theVector.begin(),
+                                                    theVector.begin()));
 }
 
 // Comparison tests.