[llvm/unittests] Use std::nullopt instead of None (NFC)

This patch mechanically replaces None with std::nullopt where the
compiler would warn if None were deprecated.  The intent is to reduce
the amount of manual work required in migrating from Optional to
std::optional.

This is part of an effort to migrate from llvm::Optional to
std::optional:

https://discourse.llvm.org/t/deprecating-llvm-optional-x-hasvalue-getvalue-getvalueor/63716

1 files changed, 2 insertions, 2 deletions

diff --git a/llvm/unittests/Support/Path.cpp b/llvm/unittests/Support/Path.cpp
index 3b8ffd8..d649deb 100644
--- a/llvm/unittests/Support/Path.cpp
+++ b/llvm/unittests/Support/Path.cpp
@@ -1994,7 +1994,7 @@ TEST_F(FileSystemTest, readNativeFileToEOF) {
         static_cast<SmallVectorImpl<char> *>(&StaysSmall),
     };
     for (SmallVectorImpl<char> *V : Vectors) {
-      ASSERT_THAT_ERROR(Read(*V, None), Succeeded());
+      ASSERT_THAT_ERROR(Read(*V, std::nullopt), Succeeded());
       ASSERT_EQ(Content, StringRef(V->begin(), V->size()));
     }
     ASSERT_EQ(fs::DefaultReadChunkSize + Content.size(), StaysSmall.capacity());
@@ -2004,7 +2004,7 @@ TEST_F(FileSystemTest, readNativeFileToEOF) {
       constexpr StringLiteral Prefix = "prefix-";
       for (SmallVectorImpl<char> *V : Vectors) {
         V->assign(Prefix.begin(), Prefix.end());
-        ASSERT_THAT_ERROR(Read(*V, None), Succeeded());
+        ASSERT_THAT_ERROR(Read(*V, std::nullopt), Succeeded());
         ASSERT_EQ((Prefix + Content).str(), StringRef(V->begin(), V->size()));
       }
     }