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

This patch replaces (llvm::|)Optional< with std::optional<.  I'll post
a separate patch to remove #include "llvm/ADT/Optional.h".

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, 14 insertions, 12 deletions

diff --git a/clang/lib/ExtractAPI/Serialization/SymbolGraphSerializer.cpp b/clang/lib/ExtractAPI/Serialization/SymbolGraphSerializer.cpp
index 91b86bd..01e9b37 100644
--- a/clang/lib/ExtractAPI/Serialization/SymbolGraphSerializer.cpp
+++ b/clang/lib/ExtractAPI/Serialization/SymbolGraphSerializer.cpp
@@ -38,14 +38,14 @@ namespace {
 
 /// Helper function to inject a JSON object \p Obj into another object \p Paren
 /// at position \p Key.
-void serializeObject(Object &Paren, StringRef Key, Optional<Object> Obj) {
+void serializeObject(Object &Paren, StringRef Key, std::optional<Object> Obj) {
   if (Obj)
     Paren[Key] = std::move(*Obj);
 }
 
 /// Helper function to inject a JSON array \p Array into object \p Paren at
 /// position \p Key.
-void serializeArray(Object &Paren, StringRef Key, Optional<Array> Array) {
+void serializeArray(Object &Paren, StringRef Key, std::optional<Array> Array) {
   if (Array)
     Paren[Key] = std::move(*Array);
 }
@@ -66,7 +66,7 @@ void serializeArray(Object &Paren, StringRef Key, Optional<Array> Array) {
 ///
 /// \returns \c std::nullopt if the version \p V is empty, or an \c Object
 /// containing the semantic version representation of \p V.
-Optional<Object> serializeSemanticVersion(const VersionTuple &V) {
+std::optional<Object> serializeSemanticVersion(const VersionTuple &V) {
   if (V.empty())
     return std::nullopt;
 
@@ -152,7 +152,8 @@ Object serializeSourceRange(const PresumedLoc &BeginLoc,
 ///
 /// \returns \c std::nullopt if the symbol has default availability attributes,
 /// or an \c Array containing the formatted availability information.
-Optional<Array> serializeAvailability(const AvailabilitySet &Availabilities) {
+std::optional<Array>
+serializeAvailability(const AvailabilitySet &Availabilities) {
   if (Availabilities.isDefault())
     return std::nullopt;
 
@@ -238,7 +239,7 @@ Object serializeIdentifier(const APIRecord &Record, Language Lang) {
 ///
 /// \returns \c std::nullopt if \p Comment is empty, or an \c Object containing
 /// the formatted lines.
-Optional<Object> serializeDocComment(const DocComment &Comment) {
+std::optional<Object> serializeDocComment(const DocComment &Comment) {
   if (Comment.empty())
     return std::nullopt;
 
@@ -290,7 +291,8 @@ Optional<Object> serializeDocComment(const DocComment &Comment) {
 ///
 /// \returns \c std::nullopt if \p DF is empty, or an \c Array containing the
 /// formatted declaration fragments array.
-Optional<Array> serializeDeclarationFragments(const DeclarationFragments &DF) {
+std::optional<Array>
+serializeDeclarationFragments(const DeclarationFragments &DF) {
   if (DF.getFragments().empty())
     return std::nullopt;
 
@@ -421,8 +423,8 @@ Object serializeSymbolKind(const APIRecord &Record, Language Lang) {
 }
 
 template <typename RecordTy>
-Optional<Object> serializeFunctionSignatureMixinImpl(const RecordTy &Record,
-                                                     std::true_type) {
+std::optional<Object>
+serializeFunctionSignatureMixinImpl(const RecordTy &Record, std::true_type) {
   const auto &FS = Record.Signature;
   if (FS.empty())
     return std::nullopt;
@@ -447,8 +449,8 @@ Optional<Object> serializeFunctionSignatureMixinImpl(const RecordTy &Record,
 }
 
 template <typename RecordTy>
-Optional<Object> serializeFunctionSignatureMixinImpl(const RecordTy &Record,
-                                                     std::false_type) {
+std::optional<Object>
+serializeFunctionSignatureMixinImpl(const RecordTy &Record, std::false_type) {
   return std::nullopt;
 }
 
@@ -583,7 +585,7 @@ bool SymbolGraphSerializer::shouldSkip(const APIRecord &Record) const {
 }
 
 template <typename RecordTy>
-Optional<Object>
+std::optional<Object>
 SymbolGraphSerializer::serializeAPIRecord(const RecordTy &Record) const {
   if (shouldSkip(Record))
     return std::nullopt;
@@ -856,7 +858,7 @@ void SymbolGraphSerializer::serialize(raw_ostream &os) {
     os << formatv("{0:2}", Value(std::move(root))) << "\n";
 }
 
-Optional<Object>
+std::optional<Object>
 SymbolGraphSerializer::serializeSingleSymbolSGF(StringRef USR,
                                                 const APISet &API) {
   APIRecord *Record = API.findRecordForUSR(USR);