[AsmParser] Use std::optional in Parser.cpp (NFC)

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, 1 deletions

diff --git a/mlir/lib/AsmParser/Parser.cpp b/mlir/lib/AsmParser/Parser.cpp
index 75298ec5329d..7eb839d875b1 100644
--- a/mlir/lib/AsmParser/Parser.cpp
+++ b/mlir/lib/AsmParser/Parser.cpp
@@ -28,6 +28,7 @@
 #include "llvm/Support/PrettyStackTrace.h"
 #include "llvm/Support/SourceMgr.h"
 #include <algorithm>
+#include <optional>
 
 using namespace mlir;
 using namespace mlir::detail;
@@ -501,7 +502,7 @@ public:
 
   /// Return the location of the value identified by its name and number if it
   /// has been already reference.
-  Optional<SMLoc> getReferenceLoc(StringRef name, unsigned number) {
+  std::optional<SMLoc> getReferenceLoc(StringRef name, unsigned number) {
     auto &values = isolatedNameScopes.back().values;
     if (!values.count(name) || number >= values[name].size())
       return {};