[lldb] Use std::optional instead of llvm::Optional (NFC)

This patch replaces (llvm::|)Optional< with std::optional<.  I'll post
a separate patch to clean up the "using" declarations, #include
"llvm/ADT/Optional.h", etc.

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, 1 insertions, 1 deletions

diff --git a/lldb/source/Plugins/SymbolFile/DWARF/ManualDWARFIndex.cpp b/lldb/source/Plugins/SymbolFile/DWARF/ManualDWARFIndex.cpp
index 4bfa357bb4ad..9afed8f4ff9b 100644
--- a/lldb/source/Plugins/SymbolFile/DWARF/ManualDWARFIndex.cpp
+++ b/lldb/source/Plugins/SymbolFile/DWARF/ManualDWARFIndex.cpp
@@ -82,7 +82,7 @@ void ManualDWARFIndex::Index() {
 
   // Keep memory down by clearing DIEs for any units if indexing
   // caused us to load the unit's DIEs.
-  std::vector<llvm::Optional<DWARFUnit::ScopedExtractDIEs>> clear_cu_dies(
+  std::vector<std::optional<DWARFUnit::ScopedExtractDIEs>> clear_cu_dies(
       units_to_index.size());
   auto parser_fn = [&](size_t cu_idx) {
     IndexUnit(*units_to_index[cu_idx], dwp_dwarf, sets[cu_idx]);