[ObjC] Raise the library version and enable new generated code.

There are no functionality changes here, this revision of the
generated code format remove some legacy things and
thus reduce verboseness of the code.

The existing format will be supported per protobuf policies
and won't be removed before then.

PiperOrigin-RevId: 729120445

Author: thomasvl

objectivec/GPBBootstrap.h

@@ -114,7 +114,7 @@
 // Current library runtime version.
 // - Gets bumped when the runtime makes changes to the interfaces between the
 //   generated code and runtime (things added/removed, etc).
-#define GOOGLE_PROTOBUF_OBJC_VERSION 30007
+#define GOOGLE_PROTOBUF_OBJC_VERSION 40310
 
 // Minimum runtime version supported for compiling/running against.
 // - Gets changed when support for the older generated code is dropped.

objectivec/GPBMessage.m

@@ -6,6 +6,7 @@
 // https://developers.google.com/open-source/licenses/bsd
 
 #import "GPBMessage.h"
+#import "GPBBootstrap.h"
 #import "GPBMessage_PackagePrivate.h"
 
 #import <Foundation/Foundation.h>
@@ -1113,19 +1114,17 @@ + (instancetype)alloc {
 + (GPBDescriptor *)descriptor {
   // This is thread safe because it is called from +initialize.
   static GPBDescriptor *descriptor = NULL;
-  static GPBFileDescription fileDescription = {
-      .package = "internal", .prefix = "", .syntax = GPBFileSyntaxProto2};
+  static GPBFilePackageAndPrefix fileDescription = {.package = "internal", .prefix = ""};
   if (!descriptor) {
-    descriptor = [GPBDescriptor
-        allocDescriptorForClass:[GPBMessage class]
-                    messageName:@"GPBMessage"
-                fileDescription:&fileDescription
-                         fields:NULL
-                     fieldCount:0
-                    storageSize:0
-                          flags:(GPBDescriptorInitializationFlag_UsesClassRefs |
-                                 GPBDescriptorInitializationFlag_Proto3OptionalKnown |
-                                 GPBDescriptorInitializationFlag_ClosedEnumSupportKnown)];
+    descriptor =
+        [GPBDescriptor allocDescriptorForClass:[GPBMessage class]
+                                   messageName:@"GPBMessage"
+                                runtimeSupport:&GOOGLE_PROTOBUF_OBJC_EXPECTED_GENCODE_VERSION_40310
+                               fileDescription:&fileDescription
+                                        fields:NULL
+                                    fieldCount:0
+                                   storageSize:0
+                                         flags:GPBDescriptorInitializationFlag_None];
   }
   return descriptor;
 }

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

@@ -233,7 +233,6 @@ void EnumGenerator::GenerateSource(io::Printer* printer) const {
         GPBEnumDescriptor *$name$_EnumDescriptor(void) {
           static _Atomic(GPBEnumDescriptor*) descriptor = nil;
           if (!descriptor) {
-            GPB_DEBUG_CHECK_RUNTIME_VERSIONS();
             static const char *valueNames =
                 $values_name_blob$
             static const int32_t values[] = {
@@ -242,6 +241,7 @@ void EnumGenerator::GenerateSource(io::Printer* printer) const {
             $maybe_extra_text_format_decl$
             GPBEnumDescriptor *worker =
                 [GPBEnumDescriptor allocDescriptorForName:GPBNSStringifySymbol($name$)
+                                           runtimeSupport:&$google_protobuf_runtime_support$
                                                valueNames:valueNames
                                                    values:values
                                                     count:(uint32_t)(sizeof(values) / sizeof(int32_t))

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

@@ -73,9 +73,6 @@ void ExtensionGenerator::GenerateStaticVariablesInitialization(
   std::vector<std::string> options;
   if (descriptor_->is_repeated()) options.push_back("GPBExtensionRepeated");
   if (descriptor_->is_packed()) options.push_back("GPBExtensionPacked");
-  if (descriptor_->containing_type()->options().message_set_wire_format()) {
-    options.push_back("GPBExtensionSetWireFormat");
-  }
 
   printer->Emit(
       {{"default",

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

@@ -86,12 +86,6 @@ void SetCommonFieldVariables(const FieldDescriptor* descriptor,
   if (descriptor->has_default_value())
     field_flags.push_back("GPBFieldHasDefaultValue");
   if (needs_custom_name) field_flags.push_back("GPBFieldTextFormatNameCustom");
-  if (descriptor->type() == FieldDescriptor::TYPE_ENUM) {
-    field_flags.push_back("GPBFieldHasEnumDescriptor");
-    if (descriptor->enum_type()->is_closed()) {
-      field_flags.push_back("GPBFieldClosedEnum");
-    }
-  }
   // It will clear on a zero value if...
   //  - not repeated/map
   //  - doesn't have presence

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

@@ -43,7 +43,7 @@ namespace objectivec {
 namespace {
 
 // This is also found in GPBBootstrap.h, and needs to be kept in sync.
-const int32_t GOOGLE_PROTOBUF_OBJC_VERSION = 30007;
+const int32_t GOOGLE_PROTOBUF_OBJC_VERSION = 40310;
 
 const char* kHeaderExtension = ".pbobjc.h";
 
@@ -607,6 +607,9 @@ void FileGenerator::GenerateFile(io::Printer* p, GeneratedFileType file_type,
        // then honor the directives within the generators sources.
        "clangfmt", "clang-format"},
       {"root_class_name", root_class_name_},
+      {"google_protobuf_runtime_support",
+       absl::StrCat("GOOGLE_PROTOBUF_OBJC_EXPECTED_GENCODE_VERSION_",
+                    GOOGLE_PROTOBUF_OBJC_VERSION)},
   });
 
   p->Emit(
@@ -740,7 +743,7 @@ void FileGenerator::EmitRootExtensionRegistryImplementation(
                    for (size_t i = 0; i < sizeof(descriptions) / sizeof(descriptions[0]); ++i) {
                      GPBExtensionDescriptor *extension =
                          [[GPBExtensionDescriptor alloc] initWithExtensionDescription:&descriptions[i]
-                                                                        usesClassRefs:YES];
+                                                                       runtimeSupport:&$google_protobuf_runtime_support$];
                      [registry addExtension:extension];
                      [self globallyRegisterExtension:extension];
                      [extension release];
@@ -773,7 +776,6 @@ void FileGenerator::EmitRootExtensionRegistryImplementation(
           // about thread safety and initialization of registry.
           static GPBExtensionRegistry* registry = nil;
           if (!registry) {
-            GPB_DEBUG_CHECK_RUNTIME_VERSIONS();
             registry = [[GPBExtensionRegistry alloc] init];
             $register_local_extensions$;
             $register_imports$
@@ -819,13 +821,11 @@ void FileGenerator::EmitFileDescription(io::Printer* p) const {
            {"prefix_value",
             objc_prefix.empty() && !file_->options().has_objc_class_prefix()
                 ? "NULL"
-                : absl::StrCat("\"", objc_prefix, "\"")},
-           {"syntax", syntax}},
+                : absl::StrCat("\"", objc_prefix, "\"")}},
           R"objc(
-            static GPBFileDescription $file_description_name$ = {
+            static GPBFilePackageAndPrefix $file_description_name$ = {
               .package = $package_value$,
-              .prefix = $prefix_value$,
-              .syntax = $syntax$
+              .prefix = $prefix_value$
             };
           )objc");
   p->Emit("\n");

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

@@ -60,12 +60,6 @@ MapFieldGenerator::MapFieldGenerator(
   if (absl::StrContains(value_field_flags, "GPBFieldHasDefaultValue")) {
     field_flags.push_back("GPBFieldHasDefaultValue");
   }
-  if (absl::StrContains(value_field_flags, "GPBFieldHasEnumDescriptor")) {
-    field_flags.push_back("GPBFieldHasEnumDescriptor");
-    if (absl::StrContains(value_field_flags, "GPBFieldClosedEnum")) {
-      field_flags.push_back("GPBFieldClosedEnum");
-    }
-  }
 
   variables_.Set("fieldflags", BuildFlagsString(FLAGTYPE_FIELD, field_flags));
 

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

@@ -429,10 +429,6 @@ void MessageGenerator::GenerateSource(io::Printer* printer) const {
                     : "GPBMessageFieldDescription");
 
   std::vector<std::string> init_flags;
-  init_flags.push_back("GPBDescriptorInitializationFlag_UsesClassRefs");
-  init_flags.push_back("GPBDescriptorInitializationFlag_Proto3OptionalKnown");
-  init_flags.push_back(
-      "GPBDescriptorInitializationFlag_ClosedEnumSupportKnown");
   if (need_defaults) {
     init_flags.push_back("GPBDescriptorInitializationFlag_FieldsWithDefault");
   }
@@ -488,10 +484,6 @@ void MessageGenerator::GenerateSource(io::Printer* printer) const {
               // Start up the root class to support the scoped extensions.
               __unused Class rootStartup = [$root_class_name$ class];
             )objc");
-          } else {
-            // The Root class has a debug runtime check, so if not
-            // starting that up, add the check.
-            printer->Emit("GPB_DEBUG_CHECK_RUNTIME_VERSIONS();\n");
           }
         }},
        {"field_description_type", field_description_type},
@@ -627,6 +619,7 @@ void MessageGenerator::GenerateSource(io::Printer* printer) const {
             GPBDescriptor *localDescriptor =
                 [GPBDescriptor allocDescriptorForClass:$class_reference$
                                            messageName:@"$message_name$"
+                                        runtimeSupport:&$google_protobuf_runtime_support$
                                        fileDescription:&$file_description_name$
                                                 fields:$fields$
                                             fieldCount:$fields_count$