Try to fix ambiguities with C++17 headers in unittest

llvm-svn: 345689

diff --git a/llvm/unittests/ADT/STLExtrasTest.cpp b/llvm/unittests/ADT/STLExtrasTest.cpp
index 80e10d071ab5695b902df2a72ea1c53dfc501f6c..642dc3f6bdd0c74cbb0a112571e0390b033482f6 100644 (file)
--- a/llvm/unittests/ADT/STLExtrasTest.cpp
+++ b/llvm/unittests/ADT/STLExtrasTest.cpp
@@ -365,6 +365,9 @@ TEST(STLExtrasTest, ADLTest) {
 }
 
 TEST(STLExtrasTest, EmptyTest) {
+  // Try to avoid ambiguities with C++17 headers.
+  using llvm::empty;
+
   std::vector<void*> V;
   EXPECT_TRUE(empty(V));
   V.push_back(nullptr);