Move OneofGenerator over to Printer::Emit

PiperOrigin-RevId: 545992294

src/google/protobuf/compiler/objectivec/oneof.cc

@@ -50,15 +50,6 @@ OneofGenerator::OneofGenerator(const OneofDescriptor* descriptor)
   variables_["raw_index"] = absl::StrCat(descriptor_->index());
   const Descriptor* msg_descriptor = descriptor_->containing_type();
   variables_["owning_message_class"] = ClassName(msg_descriptor);
-
-  std::string comments;
-  SourceLocation location;
-  if (descriptor_->GetSourceLocation(&location)) {
-    comments = BuildCommentsString(location, true);
-  } else {
-    comments = "";
-  }
-  variables_["comments"] = comments;
 }
 
 void OneofGenerator::SetOneofIndexBase(int index_base) {
@@ -68,64 +59,69 @@ void OneofGenerator::SetOneofIndexBase(int index_base) {
 }
 
 void OneofGenerator::GenerateCaseEnum(io::Printer* printer) const {
-  printer->Print(variables_, "typedef GPB_ENUM($enum_name$) {\n");
-  printer->Indent();
-  printer->Print(variables_, "$enum_name$_GPBUnsetOneOfCase = 0,\n");
-  std::string enum_name = variables_.find("enum_name")->second;
-  for (int j = 0; j < descriptor_->field_count(); j++) {
-    const FieldDescriptor* field = descriptor_->field(j);
-    std::string field_name = FieldNameCapitalized(field);
-    printer->Print("$enum_name$_$field_name$ = $field_number$,\n", "enum_name",
-                   enum_name, "field_name", field_name, "field_number",
-                   absl::StrCat(field->number()));
-  }
-  printer->Outdent();
-  // clang-format off
-  printer->Print(
-      "};\n"
-      "\n");
-  // clang-format on
+  auto vars = printer->WithVars(variables_);
+  printer->Emit({{"cases",
+                  [&] {
+                    for (int j = 0; j < descriptor_->field_count(); j++) {
+                      const FieldDescriptor* field = descriptor_->field(j);
+                      printer->Emit(
+                          {{"field_name", FieldNameCapitalized(field)},
+                           {"field_number", field->number()}},
+                          R"objc(
+                            $enum_name$_$field_name$ = $field_number$,
+                          )objc");
+                    }
+                  }}},
+                R"objc(
+                  typedef GPB_ENUM($enum_name$) {
+                    $enum_name$_GPBUnsetOneOfCase = 0,
+                    $cases$
+                  };
+                )objc");
+  printer->Emit("\n");
 }
 
 void OneofGenerator::GeneratePublicCasePropertyDeclaration(
     io::Printer* printer) const {
-  // clang-format off
-  printer->Print(
-      variables_,
-      "$comments$"
-      "@property(nonatomic, readonly) $enum_name$ $name$OneOfCase;\n"
-      "\n");
-  // clang-format on
+  auto vars = printer->WithVars(variables_);
+  printer->Emit(
+      {{"comments", [&] { EmitCommentsString(printer, descriptor_, true); }}},
+      R"objc(
+        $comments$;
+        @property(nonatomic, readonly) $enum_name$ $name$OneOfCase;
+      )objc");
+  printer->Emit("\n");
 }
 
 void OneofGenerator::GenerateClearFunctionDeclaration(
     io::Printer* printer) const {
-  // clang-format off
-  printer->Print(
-      variables_,
-      "/**\n"
-      " * Clears whatever value was set for the oneof '$name$'.\n"
-      " **/\n"
-      "void $owning_message_class$_Clear$capitalized_name$OneOfCase($owning_message_class$ *message);\n");
-  // clang-format on
+  auto vars = printer->WithVars(variables_);
+  printer->Emit(R"objc(
+      /**
+       * Clears whatever value was set for the oneof '$name$'.
+       **/
+      void $owning_message_class$_Clear$capitalized_name$OneOfCase($owning_message_class$ *message);
+    )objc");
 }
 
 void OneofGenerator::GeneratePropertyImplementation(
     io::Printer* printer) const {
-  printer->Print(variables_, "@dynamic $name$OneOfCase;\n");
+  auto vars = printer->WithVars(variables_);
+  printer->Emit(R"objc(
+    @dynamic $name$OneOfCase;
+  )objc");
 }
 
 void OneofGenerator::GenerateClearFunctionImplementation(
     io::Printer* printer) const {
-  // clang-format off
-  printer->Print(
-      variables_,
-      "void $owning_message_class$_Clear$capitalized_name$OneOfCase($owning_message_class$ *message) {\n"
-      "  GPBDescriptor *descriptor = [$owning_message_class$ descriptor];\n"
-      "  GPBOneofDescriptor *oneof = [descriptor.oneofs objectAtIndex:$raw_index$];\n"
-      "  GPBClearOneof(message, oneof);\n"
-      "}\n");
-  // clang-format on
+  auto vars = printer->WithVars(variables_);
+  printer->Emit(R"objc(
+    void $owning_message_class$_Clear$capitalized_name$OneOfCase($owning_message_class$ *message) {
+      GPBDescriptor *descriptor = [$owning_message_class$ descriptor];
+      GPBOneofDescriptor *oneof = [descriptor.oneofs objectAtIndex:$raw_index$];
+      GPBClearOneof(message, oneof);
+    }
+  )objc");
 }
 
 std::string OneofGenerator::DescriptorName() const {