third_party/protobuf: Update to HEAD (f52e188fe4)

third_party/protobuf/objectivec/GPBExtensionInternals.m

 // Protocol Buffers - Google's data interchange format
 // Copyright 2008 Google Inc.  All rights reserved.
 // https://developers.google.com/protocol-buffers/
 //
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 // notice, this list of conditions and the following disclaimer.
@@ skipping 27 matching lines @@
 #import "GPBMessage_PackagePrivate.h"
 #import "GPBUtilities_PackagePrivate.h"
 
 static id NewSingleValueFromInputStream(GPBExtensionDescriptor *extension,
                                         GPBCodedInputStream *input,
                                         GPBExtensionRegistry *extensionRegistry,
                                         GPBMessage *existingValue)
     __attribute__((ns_returns_retained));
 
 GPB_INLINE size_t DataTypeSize(GPBDataType dataType) {
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Wswitch-enum"
   switch (dataType) {
     case GPBDataTypeBool:
       return 1;
     case GPBDataTypeFixed32:
     case GPBDataTypeSFixed32:
     case GPBDataTypeFloat:
       return 4;
     case GPBDataTypeFixed64:
     case GPBDataTypeSFixed64:
     case GPBDataTypeDouble:
       return 8;
     default:
       return 0;
   }
+#pragma clang diagnostic pop
 }
 
 static size_t ComputePBSerializedSizeNoTagOfObject(GPBDataType dataType, id object) {
 #define FIELD_CASE(TYPE, ACCESSOR)                                     \
   case GPBDataType##TYPE:                                              \
     return GPBCompute##TYPE##SizeNoTag([(NSNumber *)object ACCESSOR]);
 #define FIELD_CASE2(TYPE)                                              \
   case GPBDataType##TYPE:                                              \
     return GPBCompute##TYPE##SizeNoTag(object);
   switch (dataType) {
@@ skipping 182 matching lines @@
     for (id value in values) {
       WriteObjectNoTagToCodedOutputStream(value, description, output);
     }
   } else {
     for (id value in values) {
       WriteObjectIncludingTagToCodedOutputStream(value, description, output);
     }
   }
 }
 
+// Direct access is use for speed, to avoid even internally declaring things
+// read/write, etc. The warning is enabled in the project to ensure code calling
+// protos can turn on -Wdirect-ivar-access without issues.
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Wdirect-ivar-access"
+
 void GPBExtensionMergeFromInputStream(GPBExtensionDescriptor *extension,
                                       BOOL isPackedOnStream,
                                       GPBCodedInputStream *input,
                                       GPBExtensionRegistry *extensionRegistry,
                                       GPBMessage *message) {
   GPBExtensionDescription *description = extension->description_;
   GPBCodedInputStreamState *state = &input->state_;
   if (isPackedOnStream) {
     NSCAssert(GPBExtensionIsRepeated(description),
               @"How was it packed if it isn't repeated?");
@@ skipping 97 matching lines @@
           [input readMessage:message extensionRegistry:extensionRegistry];
         }
       }
 
       return message;
     }
   }
 
   return nil;
 }
+
+#pragma clang diagnostic pop