Incremental migration of message.cc to Emit

PiperOrigin-RevId: 530630251

src/google/protobuf/compiler/cpp/message.cc

@@ -1043,31 +1043,33 @@ void MessageGenerator::GenerateOneofHasBits(io::Printer* p) {
 
 void MessageGenerator::GenerateOneofMemberHasBits(const FieldDescriptor* field,
                                                   io::Printer* p) {
-  auto t = p->WithVars(MakeTrackerCalls(field, options_));
-  Formatter format(p);
   // Singular field in a oneof
   // N.B.: Without field presence, we do not use has-bits or generate
   // has_$name$() methods, but oneofs still have set_has_$name$().
   // Oneofs also have private _internal_has_$name$() a helper method.
   if (field->has_presence()) {
-    format(
-        "inline bool $classname$::has_$name$() const {\n"
-        "$annotate_has$"
-        "  return $has_field$;\n"
-        "}\n");
+    auto t = p->WithVars(MakeTrackerCalls(field, options_));
+    p->Emit(R"cc(
+      inline bool $classname$::has_$name$() const {
+        $annotate_has$;
+        return $has_field$;
+      }
+    )cc");
   }
   if (HasInternalHasMethod(field)) {
-    format(
-        "inline bool $classname$::_internal_has_$name$() const {\n"
-        "  return $has_field$;\n"
-        "}\n");
+    p->Emit(R"cc(
+      inline bool $classname$::_internal_has_$name$() const {
+        return $has_field$;
+      }
+    )cc");
   }
   // set_has_$name$() for oneof fields is always private; hence should not be
   // annotated.
-  format(
-      "inline void $classname$::set_has_$name$() {\n"
-      "  $oneof_case$[$oneof_index$] = k$field_name$;\n"
-      "}\n");
+  p->Emit(R"cc(
+    inline void $classname$::set_has_$name$() {
+      $oneof_case$[$oneof_index$] = k$field_name$;
+    }
+  )cc");
 }
 
 void MessageGenerator::GenerateFieldClear(const FieldDescriptor* field,