Beta quality drop of Objective C Support.

- Add more to the ObjC dir readme.
- Merge the ExtensionField and ExtensionDescriptor to reduce overhead.
- Fix an initialization race.
- Clean up the Xcode schemes.
- Remove the class/enum filter.
- Remove some forced inline that were bloating things without proof of performance wins.
- Rename some internal types to avoid conflicts with the well know types protos.
- Drop the use of ApplyFunctions to the compiler/optimizer can do what it wants.
- Better document some possible future improvements.
- Add missing support for parsing repeated primitive fields in packed or unpacked forms.
- Improve -hash.
- Add *Count for repeated and map<> fields to avoid auto create when checking for them being set.

Makefile.am

@@ -506,14 +506,10 @@ objectivec_EXTRA_DIST=                                                       \
   objectivec/GPBDictionary.h                                                 \
   objectivec/GPBDictionary.m                                                 \
   objectivec/GPBDictionary_PackagePrivate.h                                  \
-  objectivec/GPBExtensionField.h                                             \
-  objectivec/GPBExtensionField.m                                             \
-  objectivec/GPBExtensionField_PackagePrivate.h                              \
+  objectivec/GPBExtensionInternals.h                                         \
+  objectivec/GPBExtensionInternals.m                                         \
   objectivec/GPBExtensionRegistry.h                                          \
   objectivec/GPBExtensionRegistry.m                                          \
-  objectivec/GPBField.h                                                      \
-  objectivec/GPBField.m                                                      \
-  objectivec/GPBField_PackagePrivate.h                                       \
   objectivec/GPBMessage.h                                                    \
   objectivec/GPBMessage.m                                                    \
   objectivec/GPBMessage_PackagePrivate.h                                     \
@@ -523,7 +519,10 @@ objectivec_EXTRA_DIST=                                                       \
   objectivec/GPBRootObject.h                                                 \
   objectivec/GPBRootObject.m                                                 \
   objectivec/GPBRootObject_PackagePrivate.h                                  \
-  objectivec/GPBTypes.h                                                      \
+  objectivec/GPBRuntimeTypes.h                                               \
+  objectivec/GPBUnknownField.h                                               \
+  objectivec/GPBUnknownField.m                                               \
+  objectivec/GPBUnknownField_PackagePrivate.h                                \
   objectivec/GPBUnknownFieldSet.h                                            \
   objectivec/GPBUnknownFieldSet.m                                            \
   objectivec/GPBUnknownFieldSet_PackagePrivate.h                             \
@@ -547,8 +546,6 @@ objectivec_EXTRA_DIST=                                                       \
   objectivec/ProtocolBuffers_OSX.xcodeproj/xcshareddata/xcschemes/PerformanceTests.xcscheme \
   objectivec/ProtocolBuffers_OSX.xcodeproj/xcshareddata/xcschemes/ProtocolBuffers.xcscheme \
   objectivec/README.md                                                       \
-  objectivec/Tests/Filter1.txt                                               \
-  objectivec/Tests/Filter2.txt                                               \
   objectivec/Tests/golden_message                                            \
   objectivec/Tests/golden_packed_fields_message                              \
   objectivec/Tests/GPBARCUnittestProtos.m                                    \
@@ -564,7 +561,6 @@ objectivec_EXTRA_DIST=                                                       \
   objectivec/Tests/GPBDictionaryTests+UInt32.m                               \
   objectivec/Tests/GPBDictionaryTests+UInt64.m                               \
   objectivec/Tests/GPBDictionaryTests.pddm                                   \
-  objectivec/Tests/GPBFilteredMessageTests.m                                 \
   objectivec/Tests/GPBMessageTests+Merge.m                                   \
   objectivec/Tests/GPBMessageTests+Runtime.m                                 \
   objectivec/Tests/GPBMessageTests+Serialization.m                           \
@@ -596,8 +592,6 @@ objectivec_EXTRA_DIST=                                                       \
   objectivec/Tests/text_format_map_unittest_data.txt                          \
   objectivec/Tests/text_format_unittest_data.txt                              \
   objectivec/Tests/unittest_cycle.proto                                       \
-  objectivec/Tests/unittest_filter.proto                                      \
-  objectivec/Tests/unittest_name_mangling.proto                               \
   objectivec/Tests/unittest_objc.proto                                        \
   objectivec/Tests/unittest_runtime_proto2.proto                              \
   objectivec/Tests/unittest_runtime_proto3.proto                              \

objectivec/DevTools/compile_testing_protos.sh

+#!/bin/bash
+
+# Invoked by the Xcode projects to build the protos needed for the unittests.
+
+set -eu
+
+readonly OUTPUT_DIR="${PROJECT_DERIVED_FILE_DIR}/protos"
+
+# Helper for bailing.
+die() {
+  echo "Error: $1"
+  exit 2
+}
+
+# What to do.
+case "${ACTION}" in
+  "")
+    # Build, fall thru
+    ;;
+  "clean")
+    rm -rf "${OUTPUT_DIR}"
+    exit 0
+    ;;
+  *)
+    die "Unknown action requested: ${ACTION}"
+    ;;
+esac
+
+# Move to the top of the protobuf directories.
+cd "${SRCROOT}/.."
+
+[[ -x src/protoc ]] || \
+  die "Could not find the protoc binary; make sure you have built it (objectivec/DevTools/full_mac_build.sh -h)."
+
+RUN_PROTOC=no
+if [[ ! -d "${OUTPUT_DIR}" ]] ; then
+  RUN_PROTOC=yes
+else
+  # Find the newest input file (protos, compiler, and this script).
+  # (these patterns catch some extra stuff, but better to over sample than
+  # under)
+  readonly NewestInput=$(find \
+     src/google/protobuf/*.proto \
+     objectivec/Tests/*.proto \
+     src/.libs src/*.la src/protoc \
+     objectivec/DevTools/compile_testing_protos.sh \
+        -type f -print0 \
+        | xargs -0 stat -f "%m %N" \
+        | sort -n | tail -n1 | cut -f2- -d" ")
+  # Find the oldest output file.
+  readonly OldestOutput=$(find \
+        "${OUTPUT_DIR}" \
+        -type f -print0 \
+        | xargs -0 stat -f "%m %N" \
+        | sort -n -r | tail -n1 | cut -f2- -d" ")
+  # If the newest input is newer than the oldest output, regenerate.
+  if [[ "${NewestInput}" -nt "${OldestOutput}" ]] ; then
+    RUN_PROTOC=yes
+  fi
+fi
+
+if [[ "${RUN_PROTOC}" != "yes" ]] ; then
+  # Up to date.
+  exit 0
+fi
+
+# Ensure the output dir exists
+mkdir -p "${OUTPUT_DIR}/google/protobuf"
+
+CORE_PROTO_FILES=(                                         \
+  src/google/protobuf/unittest_custom_options.proto        \
+  src/google/protobuf/unittest_enormous_descriptor.proto   \
+  src/google/protobuf/unittest_embed_optimize_for.proto    \
+  src/google/protobuf/unittest_empty.proto                 \
+  src/google/protobuf/unittest_import.proto                \
+  src/google/protobuf/unittest_import_lite.proto           \
+  src/google/protobuf/unittest_lite.proto                  \
+  src/google/protobuf/unittest_mset.proto                  \
+  src/google/protobuf/unittest_no_generic_services.proto   \
+  src/google/protobuf/unittest_optimize_for.proto          \
+  src/google/protobuf/unittest.proto                       \
+  src/google/protobuf/unittest_import_public.proto         \
+  src/google/protobuf/unittest_import_public_lite.proto    \
+  src/google/protobuf/unittest_drop_unknown_fields.proto   \
+  src/google/protobuf/unittest_preserve_unknown_enum.proto \
+  src/google/protobuf/map_lite_unittest.proto              \
+  src/google/protobuf/map_proto2_unittest.proto            \
+  src/google/protobuf/map_unittest.proto                   \
+)
+
+compile_proto() {
+  src/protoc                                   \
+    --objc_out="${OUTPUT_DIR}/google/protobuf" \
+    --proto_path=src/google/protobuf/          \
+    --proto_path=src                           \
+    $*
+}
+
+for a_proto in "${CORE_PROTO_FILES[@]}" ; do
+  compile_proto "${a_proto}"
+done
+
+OBJC_PROTO_FILES=(                               \
+  objectivec/Tests/unittest_cycle.proto          \
+  objectivec/Tests/unittest_runtime_proto2.proto \
+  objectivec/Tests/unittest_runtime_proto3.proto \
+  objectivec/Tests/unittest_objc.proto           \
+  objectivec/Tests/unittest_objc_startup.proto   \
+)
+
+for a_proto in "${OBJC_PROTO_FILES[@]}" ; do
+  compile_proto --proto_path="objectivec/Tests" "${a_proto}"
+done

objectivec/DevTools/full_mac_build.sh

@@ -162,7 +162,7 @@ wrapped_make -j "${NUM_MAKE_JOBS}" all
 wrapped_make -j "${NUM_MAKE_JOBS}" check
 
 header "Ensuring the ObjC descriptors are current."
-# Find the newest input file (protos, compiler, and this script).
+# Find the newest input file (protos, compiler, and the generator script).
 # (these patterns catch some extra stuff, but better to over sample than under)
 readonly NewestInput=$(find \
    src/google/protobuf/*.proto \

objectivec/GPBArray.h

@@ -30,7 +30,7 @@
 
 #import <Foundation/Foundation.h>
 
-#import "GPBTypes.h"
+#import "GPBRuntimeTypes.h"
 
 // These classes are used for repeated fields of basic data types. They are used because
 // they perform better than boxing into NSNumbers in NSArrays.

objectivec/GPBCodedInputStream.h

@@ -60,7 +60,7 @@
 - (int64_t)readSInt64;
 - (BOOL)readBool;
 - (NSString *)readString;
-- (NSData *)readData;
+- (NSData *)readBytes;
 
 // Read an embedded message field value from the stream.
 - (void)readMessage:(GPBMessage *)message

objectivec/GPBCodedInputStream.m

@@ -38,7 +38,7 @@
 
 static const NSUInteger kDefaultRecursionLimit = 64;
 
-static inline void CheckSize(GPBCodedInputStreamState *state, size_t size) {
+static void CheckSize(GPBCodedInputStreamState *state, size_t size) {
   size_t newSize = state->bufferPos + size;
   if (newSize > state->bufferSize) {
     [NSException raise:NSParseErrorException format:@""];
@@ -50,26 +50,26 @@ static inline void CheckSize(GPBCodedInputStreamState *state, size_t size) {
   }
 }
 
-static inline int8_t ReadRawByte(GPBCodedInputStreamState *state) {
+static int8_t ReadRawByte(GPBCodedInputStreamState *state) {
   CheckSize(state, sizeof(int8_t));
   return ((int8_t *)state->bytes)[state->bufferPos++];
 }
 
-static inline int32_t ReadRawLittleEndian32(GPBCodedInputStreamState *state) {
+static int32_t ReadRawLittleEndian32(GPBCodedInputStreamState *state) {
   CheckSize(state, sizeof(int32_t));
   int32_t value = OSReadLittleInt32(state->bytes, state->bufferPos);
   state->bufferPos += sizeof(int32_t);
   return value;
 }
 
-static inline int64_t ReadRawLittleEndian64(GPBCodedInputStreamState *state) {
+static int64_t ReadRawLittleEndian64(GPBCodedInputStreamState *state) {
   CheckSize(state, sizeof(int64_t));
   int64_t value = OSReadLittleInt64(state->bytes, state->bufferPos);
   state->bufferPos += sizeof(int64_t);
   return value;
 }
 
-static inline int32_t ReadRawVarint32(GPBCodedInputStreamState *state) {
+static int32_t ReadRawVarint32(GPBCodedInputStreamState *state) {
   int8_t tmp = ReadRawByte(state);
   if (tmp >= 0) {
     return tmp;
@@ -104,7 +104,7 @@ static inline int32_t ReadRawVarint32(GPBCodedInputStreamState *state) {
   return result;
 }
 
-static inline int64_t ReadRawVarint64(GPBCodedInputStreamState *state) {
+static int64_t ReadRawVarint64(GPBCodedInputStreamState *state) {
   int32_t shift = 0;
   int64_t result = 0;
   while (shift < 64) {
@@ -119,7 +119,7 @@ static inline int64_t ReadRawVarint64(GPBCodedInputStreamState *state) {
   return 0;
 }
 
-static inline void SkipRawData(GPBCodedInputStreamState *state, size_t size) {
+static void SkipRawData(GPBCodedInputStreamState *state, size_t size) {
   CheckSize(state, size);
   state->bufferPos += size;
 }
@@ -222,7 +222,7 @@ NSString *GPBCodedInputStreamReadRetainedString(
   return result;
 }
 
-NSData *GPBCodedInputStreamReadRetainedData(GPBCodedInputStreamState *state) {
+NSData *GPBCodedInputStreamReadRetainedBytes(GPBCodedInputStreamState *state) {
   int32_t size = ReadRawVarint32(state);
   if (size < 0) return nil;
   CheckSize(state, size);
@@ -232,7 +232,7 @@ NSData *GPBCodedInputStreamReadRetainedData(GPBCodedInputStreamState *state) {
   return result;
 }
 
-NSData *GPBCodedInputStreamReadRetainedDataNoCopy(
+NSData *GPBCodedInputStreamReadRetainedBytesNoCopy(
     GPBCodedInputStreamState *state) {
   int32_t size = ReadRawVarint32(state);
   if (size < 0) return nil;
@@ -453,8 +453,8 @@ void GPBCodedInputStreamCheckLastTagWas(GPBCodedInputStreamState *state,
   GPBCodedInputStreamPopLimit(&state_, oldLimit);
 }
 
-- (NSData *)readData {
-  return [GPBCodedInputStreamReadRetainedData(&state_) autorelease];
+- (NSData *)readBytes {
+  return [GPBCodedInputStreamReadRetainedBytes(&state_) autorelease];
 }
 
 - (uint32_t)readUInt32 {
@@ -499,7 +499,7 @@ void GPBCodedInputStreamCheckLastTagWas(GPBCodedInputStreamState *state,
 
 // Returns true if the passed in bytes are 7 bit ascii.
 // This routine needs to be fast.
-static inline bool AreBytesIn7BitASCII(const uint8_t *bytes, NSUInteger len) {
+static bool AreBytesIn7BitASCII(const uint8_t *bytes, NSUInteger len) {
 // In the loops below, it's more efficient to collect rather than do
 // conditional at every step.
 #if __LP64__
@@ -587,7 +587,7 @@ static inline bool AreBytesIn7BitASCII(const uint8_t *bytes, NSUInteger len) {
   return true;
 }
 
-static inline void GPBStringInitStringValue(GPBString *string) {
+static void GPBStringInitStringValue(GPBString *string) {
   OSSpinLockLock(&string->lock_);
   GPBStringInitStringValueAlreadyLocked(string);
   OSSpinLockUnlock(&string->lock_);

objectivec/GPBCodedInputStream_PackagePrivate.h

@@ -114,9 +114,9 @@ int64_t GPBCodedInputStreamReadSInt64(GPBCodedInputStreamState *state);
 BOOL GPBCodedInputStreamReadBool(GPBCodedInputStreamState *state);
 NSString *GPBCodedInputStreamReadRetainedString(GPBCodedInputStreamState *state)
     __attribute((ns_returns_retained));
-NSData *GPBCodedInputStreamReadRetainedData(GPBCodedInputStreamState *state)
+NSData *GPBCodedInputStreamReadRetainedBytes(GPBCodedInputStreamState *state)
     __attribute((ns_returns_retained));
-NSData *GPBCodedInputStreamReadRetainedDataNoCopy(
+NSData *GPBCodedInputStreamReadRetainedBytesNoCopy(
     GPBCodedInputStreamState *state) __attribute((ns_returns_retained));
 
 size_t GPBCodedInputStreamPushLimit(GPBCodedInputStreamState *state,

objectivec/GPBDescriptor.h

@@ -30,7 +30,7 @@
 
 #import <Foundation/Foundation.h>
 
-#import "GPBTypes.h"
+#import "GPBRuntimeTypes.h"
 
 @class GPBEnumDescriptor;
 @class GPBFieldDescriptor;
@@ -89,14 +89,14 @@ typedef NS_ENUM(NSInteger, GPBFieldType) {
 
 @property(nonatomic, readonly, copy) NSString *name;
 @property(nonatomic, readonly) uint32_t number;
-@property(nonatomic, readonly) GPBType type;
+@property(nonatomic, readonly) GPBDataType dataType;
 @property(nonatomic, readonly) BOOL hasDefaultValue;
-@property(nonatomic, readonly) GPBValue defaultValue;
+@property(nonatomic, readonly) GPBGenericValue defaultValue;
 @property(nonatomic, readonly, getter=isRequired) BOOL required;
 @property(nonatomic, readonly, getter=isOptional) BOOL optional;
 @property(nonatomic, readonly) GPBFieldType fieldType;
 // If it is a map, the value type is in -type.
-@property(nonatomic, readonly) GPBType mapKeyType;
+@property(nonatomic, readonly) GPBDataType mapKeyDataType;
 @property(nonatomic, readonly, getter=isPackable) BOOL packable;
 
 @property(nonatomic, readonly, assign) GPBOneofDescriptor *containingOneof;
@@ -129,12 +129,14 @@ typedef NS_ENUM(NSInteger, GPBFieldType) {
 
 @end
 
-@interface GPBExtensionDescriptor : NSObject
+@interface GPBExtensionDescriptor : NSObject<NSCopying>
 @property(nonatomic, readonly) uint32_t fieldNumber;
-@property(nonatomic, readonly) GPBType type;
+@property(nonatomic, readonly) Class containingMessageClass;
+@property(nonatomic, readonly) GPBDataType dataType;
 @property(nonatomic, readonly, getter=isRepeated) BOOL repeated;
 @property(nonatomic, readonly, getter=isPackable) BOOL packable;
 @property(nonatomic, readonly, assign) Class msgClass;
 @property(nonatomic, readonly) NSString *singletonName;
 @property(nonatomic, readonly, strong) GPBEnumDescriptor *enumDescriptor;
+@property(nonatomic, readonly) id defaultValue;
 @end

objectivec/GPBDescriptor_PackagePrivate.h

@@ -33,6 +33,7 @@
 // subject to change at any time without notice.
 
 #import "GPBDescriptor.h"
+#import "GPBWireFormat.h"
 
 // Describes attributes of the field.
 typedef NS_OPTIONS(uint32_t, GPBFieldFlags) {
@@ -66,8 +67,6 @@ typedef NS_OPTIONS(uint32_t, GPBFieldFlags) {
   // set, the name can be derived from the ObjC name.
   GPBFieldTextFormatNameCustom = 1 << 16,
   // Indicates the field has an enum descriptor.
-  // TODO(thomasvl): Output the CPP check to use descFunc or validator based
-  // on final compile.  This will then get added based on that.
   GPBFieldHasEnumDescriptor = 1 << 17,
 };
 
@@ -84,21 +83,21 @@ typedef struct GPBMessageFieldDescription {
   int32_t hasIndex;
   // Field flags. Use accessor functions below.
   GPBFieldFlags flags;
-  // Type of the ivar.
-  GPBType type;
+  // Data type of the ivar.
+  GPBDataType dataType;
   // Offset of the variable into it's structure struct.
   size_t offset;
   // FieldOptions protobuf, serialized as string.
   const char *fieldOptions;
 
-  GPBValue defaultValue;  // Default value for the ivar.
+  GPBGenericValue defaultValue;  // Default value for the ivar.
   union {
     const char *className;  // Name for message class.
     // For enums only: If EnumDescriptors are compiled in, it will be that,
     // otherwise it will be the verifier.
     GPBEnumDescriptorFunc enumDescFunc;
     GPBEnumValidationFunc enumVerifier;
-  } typeSpecific;
+  } dataTypeSpecific;
 } GPBMessageFieldDescription;
 
 // Describes a oneof.
@@ -133,10 +132,10 @@ typedef NS_OPTIONS(uint32_t, GPBExtensionOptions) {
 // An extension
 typedef struct GPBExtensionDescription {
   const char *singletonName;
-  GPBType type;
+  GPBDataType dataType;
   const char *extendedClass;
   int32_t fieldNumber;
-  GPBValue defaultValue;
+  GPBGenericValue defaultValue;
   const char *messageOrGroupClassName;
   GPBExtensionOptions options;
   GPBEnumDescriptorFunc enumDescriptorFunc;
@@ -217,7 +216,7 @@ typedef struct GPBExtensionDescription {
 
   SEL getSel_;
   SEL setSel_;
-  SEL hasSel_;
+  SEL hasOrCountSel_;  // *Count for map<>/repeated fields, has* otherwise.
   SEL setHasSel_;
 }
 
@@ -254,10 +253,18 @@ typedef struct GPBExtensionDescription {
  @package
   GPBExtensionDescription *description_;
 }
+@property(nonatomic, readonly) GPBWireFormat wireType;
+
+// For repeated extensions, alternateWireType is the wireType with the opposite
+// value for the packable property.  i.e. - if the extension was marked packed
+// it would be the wire type for unpacked; if the extension was marked unpacked,
+// it would be the wire type for packed.
+@property(nonatomic, readonly) GPBWireFormat alternateWireType;
 
 // description has to be long lived, it is held as a raw pointer.
 - (instancetype)initWithExtensionDescription:
-        (GPBExtensionDescription *)description;
+    (GPBExtensionDescription *)description;
+- (NSComparisonResult)compareByFieldNumber:(GPBExtensionDescriptor *)other;
 @end
 
 CF_EXTERN_C_BEGIN
@@ -267,8 +274,8 @@ GPB_INLINE BOOL GPBFieldIsMapOrArray(GPBFieldDescriptor *field) {
           (GPBFieldRepeated | GPBFieldMapKeyMask)) != 0;
 }
 
-GPB_INLINE GPBType GPBGetFieldType(GPBFieldDescriptor *field) {
-  return field->description_->type;
+GPB_INLINE GPBDataType GPBGetFieldDataType(GPBFieldDescriptor *field) {
+  return field->description_->dataType;
 }
 
 GPB_INLINE int32_t GPBFieldHasIndex(GPBFieldDescriptor *field) {
@@ -281,6 +288,12 @@ GPB_INLINE uint32_t GPBFieldNumber(GPBFieldDescriptor *field) {
 
 uint32_t GPBFieldTag(GPBFieldDescriptor *self);
 
+// For repeated fields, alternateWireType is the wireType with the opposite
+// value for the packable property.  i.e. - if the field was marked packed it
+// would be the wire type for unpacked; if the field was marked unpacked, it
+// would be the wire type for packed.
+uint32_t GPBFieldAlternateTag(GPBFieldDescriptor *self);
+
 GPB_INLINE BOOL GPBPreserveUnknownFields(GPBFileSyntax syntax) {
   return syntax != GPBFileSyntaxProto3;
 }
@@ -289,4 +302,17 @@ GPB_INLINE BOOL GPBHasPreservingUnknownEnumSemantics(GPBFileSyntax syntax) {
   return syntax == GPBFileSyntaxProto3;
 }
 
+GPB_INLINE BOOL GPBExtensionIsRepeated(GPBExtensionDescription *description) {
+  return (description->options & GPBExtensionRepeated) != 0;
+}
+
+GPB_INLINE BOOL GPBExtensionIsPacked(GPBExtensionDescription *description) {
+  return (description->options & GPBExtensionPacked) != 0;
+}
+
+GPB_INLINE BOOL GPBExtensionIsWireFormat(GPBExtensionDescription *description) {
+  return (description->options & GPBExtensionSetWireFormat) != 0;
+}
+
+
 CF_EXTERN_C_END

objectivec/GPBDictionary.h

@@ -30,7 +30,7 @@
 
 #import <Foundation/Foundation.h>
 
-#import "GPBTypes.h"
+#import "GPBRuntimeTypes.h"
 
 // These classes are used for map fields of basic data types. They are used because
 // they perform better than boxing into NSNumbers in NSDictionaries.

objectivec/GPBDictionary_PackagePrivate.h

@@ -41,7 +41,8 @@
 - (size_t)computeSerializedSizeAsField:(GPBFieldDescriptor *)field;
 - (void)writeToCodedOutputStream:(GPBCodedOutputStream *)outputStream
                          asField:(GPBFieldDescriptor *)field;
-- (void)setGPBValue:(GPBValue *)value forGPBValueKey:(GPBValue *)key;
+- (void)setGPBGenericValue:(GPBGenericValue *)value
+     forGPBGenericValueKey:(GPBGenericValue *)key;
 - (void)enumerateForTextFormat:(void (^)(id keyObj, id valueObj))block;
 @end
 
@@ -75,8 +76,8 @@
 //%
 //%PDDM-DEFINE EXTRA_DICTIONARY_PRIVATE_INTERFACES_Enum()
 //%- (NSData *)serializedDataForUnknownValue:(int32_t)value
-//%                                   forKey:(GPBValue *)key
-//%                                  keyType:(GPBType)keyType;
+//%                                   forKey:(GPBGenericValue *)key
+//%                              keyDataType:(GPBDataType)keyDataType;
 //%
 
 //%PDDM-EXPAND DICTIONARY_PRIV_INTERFACES_FOR_POD_KEY(UInt32)
@@ -129,8 +130,8 @@
   GPB_UNSAFE_UNRETAINED GPBMessage *_autocreator;
 }
 - (NSData *)serializedDataForUnknownValue:(int32_t)value
-                                   forKey:(GPBValue *)key
-                                  keyType:(GPBType)keyType;
+                                   forKey:(GPBGenericValue *)key
+                              keyDataType:(GPBDataType)keyDataType;
 @end
 
 @interface GPBUInt32ObjectDictionary () <GPBDictionaryInternalsProtocol> {
@@ -192,8 +193,8 @@
   GPB_UNSAFE_UNRETAINED GPBMessage *_autocreator;
 }
 - (NSData *)serializedDataForUnknownValue:(int32_t)value
-                                   forKey:(GPBValue *)key
-                                  keyType:(GPBType)keyType;
+                                   forKey:(GPBGenericValue *)key
+                              keyDataType:(GPBDataType)keyDataType;
 @end
 
 @interface GPBInt32ObjectDictionary () <GPBDictionaryInternalsProtocol> {
@@ -255,8 +256,8 @@
   GPB_UNSAFE_UNRETAINED GPBMessage *_autocreator;
 }
 - (NSData *)serializedDataForUnknownValue:(int32_t)value
-                                   forKey:(GPBValue *)key
-                                  keyType:(GPBType)keyType;
+                                   forKey:(GPBGenericValue *)key
+                              keyDataType:(GPBDataType)keyDataType;
 @end
 
 @interface GPBUInt64ObjectDictionary () <GPBDictionaryInternalsProtocol> {
@@ -318,8 +319,8 @@
   GPB_UNSAFE_UNRETAINED GPBMessage *_autocreator;
 }
 - (NSData *)serializedDataForUnknownValue:(int32_t)value
-                                   forKey:(GPBValue *)key
-                                  keyType:(GPBType)keyType;
+                                   forKey:(GPBGenericValue *)key
+                              keyDataType:(GPBDataType)keyDataType;
 @end
 
 @interface GPBInt64ObjectDictionary () <GPBDictionaryInternalsProtocol> {
@@ -381,8 +382,8 @@
   GPB_UNSAFE_UNRETAINED GPBMessage *_autocreator;
 }
 - (NSData *)serializedDataForUnknownValue:(int32_t)value
-                                   forKey:(GPBValue *)key
-                                  keyType:(GPBType)keyType;
+                                   forKey:(GPBGenericValue *)key
+                              keyDataType:(GPBDataType)keyDataType;
 @end
 
 @interface GPBBoolObjectDictionary () <GPBDictionaryInternalsProtocol> {
@@ -444,8 +445,8 @@
   GPB_UNSAFE_UNRETAINED GPBMessage *_autocreator;
 }
 - (NSData *)serializedDataForUnknownValue:(int32_t)value
-                                   forKey:(GPBValue *)key
-                                  keyType:(GPBType)keyType;
+                                   forKey:(GPBGenericValue *)key
+                              keyDataType:(GPBDataType)keyDataType;
 @end
 
 //%PDDM-EXPAND-END (6 expansions)

objectivec/GPBExtensionField_PackagePrivate.h

-// 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.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-#import <Foundation/Foundation.h>
-
-#import "GPBExtensionField.h"
-
-struct GPBExtensionDescription;
-
-@interface GPBExtensionField ()
-
-- (void)mergeFromCodedInputStream:(GPBCodedInputStream *)input
-                extensionRegistry:(GPBExtensionRegistry *)extensionRegistry
-                          message:(GPBMessage *)message;
-
-- (instancetype)initWithDescription:(struct GPBExtensionDescription *)description;
-
-- (size_t)computeSerializedSizeIncludingTag:(id)value;
-- (void)writeValue:(id)value
-    includingTagToCodedOutputStream:(GPBCodedOutputStream *)output;
-
-- (NSComparisonResult)compareByFieldNumber:(GPBExtensionField *)other;
-
-@end

objectivec/GPBExtensionField.h → objectivec/GPBExtensionInternals.h

@@ -30,22 +30,21 @@
 
 #import <Foundation/Foundation.h>
 
-#import "GPBWireFormat.h"
-#import "GPBTypes.h"
+#import "GPBDescriptor.h"
 
 @class GPBCodedInputStream;
 @class GPBCodedOutputStream;
 @class GPBExtensionRegistry;
-@class GPBDescriptor;
-@class GPBExtensionDescriptor;
 
-@interface GPBExtensionField : NSObject<NSCopying>
+void GPBExtensionMergeFromInputStream(GPBExtensionDescriptor *extension,
+                                      BOOL isPackedOnStream,
+                                      GPBCodedInputStream *input,
+                                      GPBExtensionRegistry *extensionRegistry,
+                                      GPBMessage *message);
 
-@property(nonatomic, readonly) int32_t fieldNumber;
-@property(nonatomic, readonly) GPBWireFormat wireType;
-@property(nonatomic, readonly) BOOL isRepeated;
-@property(nonatomic, readonly) GPBDescriptor *containingType;
-@property(nonatomic, readonly) id defaultValue;
-@property(nonatomic, readonly) GPBExtensionDescriptor *descriptor;
+size_t GPBComputeExtensionSerializedSizeIncludingTag(
+    GPBExtensionDescriptor *extension, id value);
 
-@end
+void GPBWriteExtensionValueToOutputStream(GPBExtensionDescriptor *extension,
+                                          id value,
+                                          GPBCodedOutputStream *output);

objectivec/GPBExtensionRegistry.h

@@ -31,7 +31,7 @@
 #import <Foundation/Foundation.h>
 
 @class GPBDescriptor;
-@class GPBExtensionField;
+@class GPBExtensionDescriptor;
 
 // A table of known extensions, searchable by name or field number.  When
 // parsing a protocol message that might have extensions, you must provide an
@@ -54,10 +54,10 @@
 //
 @interface GPBExtensionRegistry : NSObject<NSCopying>
 
-- (void)addExtension:(GPBExtensionField *)extension;
+- (void)addExtension:(GPBExtensionDescriptor *)extension;
 - (void)addExtensions:(GPBExtensionRegistry *)registry;
 
-- (GPBExtensionField *)getExtension:(GPBDescriptor *)containingType
-                        fieldNumber:(NSInteger)fieldNumber;
+- (GPBExtensionDescriptor *)extensionForDescriptor:(GPBDescriptor *)descriptor
+                                       fieldNumber:(NSInteger)fieldNumber;
 
 @end

objectivec/GPBExtensionRegistry.m

@@ -32,7 +32,6 @@
 
 #import "GPBBootstrap.h"
 #import "GPBDescriptor.h"
-#import "GPBExtensionField.h"
 
 @implementation GPBExtensionRegistry {
   // TODO(dmaclach): Reimplement with CFDictionaries that don't use
@@ -60,31 +59,34 @@
   return result;
 }
 
-- (NSMutableDictionary *)extensionMapForContainingType:
-        (GPBDescriptor *)containingType {
+- (NSMutableDictionary *)extensionMapForContainingMessageClass:
+        (Class)containingMessageClass {
   NSMutableDictionary *extensionMap =
-      [mutableClassMap_ objectForKey:containingType];
+      [mutableClassMap_ objectForKey:containingMessageClass];
   if (extensionMap == nil) {
     extensionMap = [NSMutableDictionary dictionary];
-    [mutableClassMap_ setObject:extensionMap forKey:containingType];
+    [mutableClassMap_ setObject:extensionMap
+                         forKey:(id<NSCopying>)containingMessageClass];
   }
   return extensionMap;
 }
 
-- (void)addExtension:(GPBExtensionField *)extension {
+- (void)addExtension:(GPBExtensionDescriptor *)extension {
   if (extension == nil) {
     return;
   }
 
-  GPBDescriptor *containingType = [extension containingType];
+  Class containingMessageClass = extension.containingMessageClass;
   NSMutableDictionary *extensionMap =
-      [self extensionMapForContainingType:containingType];
-  [extensionMap setObject:extension forKey:@([extension fieldNumber])];
+      [self extensionMapForContainingMessageClass:containingMessageClass];
+  [extensionMap setObject:extension forKey:@(extension.fieldNumber)];
 }
 
-- (GPBExtensionField *)getExtension:(GPBDescriptor *)containingType
-                        fieldNumber:(NSInteger)fieldNumber {
-  NSDictionary *extensionMap = [mutableClassMap_ objectForKey:containingType];
+- (GPBExtensionDescriptor *)extensionForDescriptor:(GPBDescriptor *)descriptor
+                                       fieldNumber:(NSInteger)fieldNumber {
+  Class messageClass = descriptor.messageClass;
+  NSDictionary *extensionMap =
+      [mutableClassMap_ objectForKey:messageClass];
   return [extensionMap objectForKey:@(fieldNumber)];
 }
 
@@ -94,11 +96,11 @@
     return;
   }
   NSMutableDictionary *otherClassMap = registry->mutableClassMap_;
-  for (GPBDescriptor *containingType in otherClassMap) {
+  for (Class containingMessageClass in otherClassMap) {
     NSMutableDictionary *extensionMap =
-        [self extensionMapForContainingType:containingType];
+        [self extensionMapForContainingMessageClass:containingMessageClass];
     NSMutableDictionary *otherExtensionMap =
-        [registry extensionMapForContainingType:containingType];
+        [registry extensionMapForContainingMessageClass:containingMessageClass];
     [extensionMap addEntriesFromDictionary:otherExtensionMap];
   }
 }

objectivec/GPBMessage.h

@@ -35,7 +35,7 @@
 @class GPBDescriptor;
 @class GPBCodedInputStream;
 @class GPBCodedOutputStream;
-@class GPBExtensionField;
+@class GPBExtensionDescriptor;
 @class GPBExtensionRegistry;
 @class GPBFieldDescriptor;
 @class GPBUnknownFieldSet;
@@ -148,14 +148,14 @@ CF_EXTERN_C_END
 // Extensions use boxed values (NSNumbers) for PODs, NSMutableArrays for
 // repeated. If the extension is a Message one will be auto created for you
 // and returned similar to fields.
-- (BOOL)hasExtension:(GPBExtensionField *)extension;
-- (id)getExtension:(GPBExtensionField *)extension;
-- (void)setExtension:(GPBExtensionField *)extension value:(id)value;
-- (void)addExtension:(GPBExtensionField *)extension value:(id)value;
-- (void)setExtension:(GPBExtensionField *)extension
+- (BOOL)hasExtension:(GPBExtensionDescriptor *)extension;
+- (id)getExtension:(GPBExtensionDescriptor *)extension;
+- (void)setExtension:(GPBExtensionDescriptor *)extension value:(id)value;
+- (void)addExtension:(GPBExtensionDescriptor *)extension value:(id)value;
+- (void)setExtension:(GPBExtensionDescriptor *)extension
                index:(NSUInteger)index
                value:(id)value;
-- (void)clearExtension:(GPBExtensionField *)extension;
+- (void)clearExtension:(GPBExtensionDescriptor *)extension;
 
 - (void)setUnknownFields:(GPBUnknownFieldSet *)unknownFields;
 

objectivec/GPBMessage_PackagePrivate.h

@@ -67,9 +67,9 @@ typedef struct GPBMessage_Storage *GPBMessage_StoragePtr;
 
 // Gets an extension value without autocreating the result if not found. (i.e.
 // returns nil if the extension is not set)
-- (id)getExistingExtension:(GPBExtensionField *)extension;
+- (id)getExistingExtension:(GPBExtensionDescriptor *)extension;
 
-// Returns an array of GPBExtensionField* for all the extensions currently
+// Returns an array of GPBExtensionDescriptor* for all the extensions currently
 // in use on the message.  They are sorted by field number.
 - (NSArray *)sortedExtensionsInUse;
 

objectivec/GPBProtocolBuffers.h

@@ -35,11 +35,10 @@
 #import "GPBCodedOutputStream.h"
 #import "GPBDescriptor.h"
 #import "GPBDictionary.h"
-#import "GPBExtensionField.h"
 #import "GPBExtensionRegistry.h"
-#import "GPBField.h"
 #import "GPBMessage.h"
 #import "GPBRootObject.h"
+#import "GPBUnknownField.h"
 #import "GPBUnknownFieldSet.h"
 #import "GPBUtilities.h"
 #import "GPBWireFormat.h"

objectivec/GPBProtocolBuffers.m

@@ -36,14 +36,27 @@
 #import "GPBCodedOutputStream.m"
 #import "GPBDescriptor.m"
 #import "GPBDictionary.m"
-#import "GPBExtensionField.m"
+#import "GPBExtensionInternals.m"
 #import "GPBExtensionRegistry.m"
-#import "GPBField.m"
 #import "GPBMessage.m"
 #import "GPBRootObject.m"
+#import "GPBUnknownField.m"
 #import "GPBUnknownFieldSet.m"
 #import "GPBUtilities.m"
 #import "GPBWellKnownTypes.m"
 #import "GPBWireFormat.m"
 
 #import "google/protobuf/Descriptor.pbobjc.m"
+
+// Duration and Timestamp are #imported into GPBWellKnownTypes.m to the
+// Objective C categories added will always be linked in with the classes.
+#import "google/protobuf/Any.pbobjc.m"
+#import "google/protobuf/Api.pbobjc.m"
+// #import "google/protobuf/Duration.pbobjc.m"
+#import "google/protobuf/Empty.pbobjc.m"
+#import "google/protobuf/FieldMask.pbobjc.m"
+#import "google/protobuf/SourceContext.pbobjc.m"
+#import "google/protobuf/Struct.pbobjc.m"
+// #import "google/protobuf/Timestamp.pbobjc.m"
+#import "google/protobuf/Type.pbobjc.m"
+#import "google/protobuf/Wrappers.pbobjc.m"

objectivec/GPBProtocolBuffers_RuntimeSupport.h

@@ -34,8 +34,7 @@
 #import "GPBProtocolBuffers.h"
 
 #import "GPBDescriptor_PackagePrivate.h"
-#import "GPBExtensionField_PackagePrivate.h"
-#import "GPBExtensionRegistry.h"
+#import "GPBExtensionInternals.h"
 #import "GPBMessage_PackagePrivate.h"
 #import "GPBRootObject_PackagePrivate.h"
 #import "GPBUtilities_PackagePrivate.h"

objectivec/GPBRootObject.m

@@ -36,7 +36,6 @@
 #import <CoreFoundation/CoreFoundation.h>
 
 #import "GPBDescriptor.h"
-#import "GPBExtensionField.h"
 #import "GPBUtilities_PackagePrivate.h"
 
 @interface GPBExtensionDescriptor (GPBRootObject)
@@ -130,14 +129,14 @@ static CFMutableDictionaryRef gExtensionSingletonDictionary = NULL;
   return nil;
 }
 
-+ (void)globallyRegisterExtension:(GPBExtensionField *)field {
-  const char *key = [field.descriptor singletonNameC];
++ (void)globallyRegisterExtension:(GPBExtensionDescriptor *)field {
+  const char *key = [field singletonNameC];
   OSSpinLockLock(&gExtensionSingletonDictionaryLock_);
   CFDictionarySetValue(gExtensionSingletonDictionary, key, field);
   OSSpinLockUnlock(&gExtensionSingletonDictionaryLock_);
 }
 
-GPB_INLINE id ExtensionForName(id self, SEL _cmd) {
+static id ExtensionForName(id self, SEL _cmd) {
   // Really fast way of doing "classname_selName".
   // This came up as a hotspot (creation of NSString *) when accessing a
   // lot of extensions.

objectivec/GPBRootObject_PackagePrivate.h

@@ -32,12 +32,12 @@
 
 #import "GPBRootObject.h"
 
-@class GPBExtensionField;
+@class GPBExtensionDescriptor;
 
 @interface GPBRootObject ()
 
 // Globally register.
-+ (void)globallyRegisterExtension:(GPBExtensionField *)field;
++ (void)globallyRegisterExtension:(GPBExtensionDescriptor *)field;
 
 @end
 

objectivec/GPBTypes.h → objectivec/GPBRuntimeTypes.h

@@ -63,36 +63,36 @@ typedef union {
   GPB_UNSAFE_UNRETAINED NSString *valueString;
   GPB_UNSAFE_UNRETAINED GPBMessage *valueMessage;
   int32_t valueEnum;
-} GPBValue;
+} GPBGenericValue;
 
 // Do not change the order of this enum (or add things to it) without thinking
 // about it very carefully. There are several things that depend on the order.
 typedef enum {
-  GPBTypeBool = 0,
-  GPBTypeFixed32,
-  GPBTypeSFixed32,
-  GPBTypeFloat,
-  GPBTypeFixed64,
-  GPBTypeSFixed64,
-  GPBTypeDouble,
-  GPBTypeInt32,
-  GPBTypeInt64,
-  GPBTypeSInt32,
-  GPBTypeSInt64,
-  GPBTypeUInt32,
-  GPBTypeUInt64,
-  GPBTypeData,  // Maps to Bytes Protobuf type
-  GPBTypeString,
-  GPBTypeMessage,
-  GPBTypeGroup,
-  GPBTypeEnum,
-} GPBType;
+  GPBDataTypeBool = 0,
+  GPBDataTypeFixed32,
+  GPBDataTypeSFixed32,
+  GPBDataTypeFloat,
+  GPBDataTypeFixed64,
+  GPBDataTypeSFixed64,
+  GPBDataTypeDouble,
+  GPBDataTypeInt32,
+  GPBDataTypeInt64,
+  GPBDataTypeSInt32,
+  GPBDataTypeSInt64,
+  GPBDataTypeUInt32,
+  GPBDataTypeUInt64,
+  GPBDataTypeBytes,
+  GPBDataTypeString,
+  GPBDataTypeMessage,
+  GPBDataTypeGroup,
+  GPBDataTypeEnum,
+} GPBDataType;
 
 enum {
-  // A count of the number of types in GPBType. Separated out from the GPBType
-  // enum to avoid warnings regarding not handling GPBTypeCount in switch
-  // statements.
-  GPBTypeCount = GPBTypeEnum + 1
+  // A count of the number of types in GPBDataType. Separated out from the
+  // GPBDataType enum to avoid warnings regarding not handling
+  // GPBDataType_Count in switch statements.
+  GPBDataType_Count = GPBDataTypeEnum + 1
 };
 
 // An extension range.

objectivec/GPBField.h → objectivec/GPBUnknownField.h

@@ -35,7 +35,7 @@
 @class GPBUInt64Array;
 @class GPBUnknownFieldSet;
 
-@interface GPBField : NSObject<NSCopying>
+@interface GPBUnknownField : NSObject<NSCopying>
 
 @property(nonatomic, readonly, assign) int32_t number;
 
@@ -43,8 +43,8 @@
 @property(nonatomic, readonly, strong) GPBUInt64Array *varintList;
 @property(nonatomic, readonly, strong) GPBUInt32Array *fixed32List;
 @property(nonatomic, readonly, strong) GPBUInt64Array *fixed64List;
-@property(nonatomic, readonly, strong) NSArray *lengthDelimitedList;
-@property(nonatomic, readonly, strong) NSArray *groupList;
+@property(nonatomic, readonly, strong) NSArray *lengthDelimitedList;  // NSData
+@property(nonatomic, readonly, strong) NSArray *groupList;  // GPBUnknownFieldSet
 
 // Only one of these should be used per Field.
 - (void)addVarint:(uint64_t)value;

objectivec/GPBField.m → objectivec/GPBUnknownField.m

@@ -28,12 +28,12 @@
 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
-#import "GPBField_PackagePrivate.h"
+#import "GPBUnknownField_PackagePrivate.h"
 
 #import "GPBArray.h"
 #import "GPBCodedOutputStream.h"
 
-@interface GPBField () {
+@implementation GPBUnknownField {
  @protected
   int32_t number_;
   GPBUInt64Array *mutableVarintList_;
@@ -42,9 +42,6 @@
   NSMutableArray *mutableLengthDelimitedList_;
   NSMutableArray *mutableGroupList_;
 }
-@end
-
-@implementation GPBField
 
 @synthesize number = number_;
 @synthesize varintList = mutableVarintList_;
@@ -71,7 +68,8 @@
 }
 
 - (id)copyWithZone:(NSZone *)zone {
-  GPBField *result = [[GPBField allocWithZone:zone] initWithNumber:number_];
+  GPBUnknownField *result =
+      [[GPBUnknownField allocWithZone:zone] initWithNumber:number_];
   result->mutableFixed32List_ = [mutableFixed32List_ copyWithZone:zone];
   result->mutableFixed64List_ = [mutableFixed64List_ copyWithZone:zone];
   result->mutableLengthDelimitedList_ =
@@ -91,8 +89,8 @@
 
 - (BOOL)isEqual:(id)object {
   if (self == object) return YES;
-  if (![object isKindOfClass:[GPBField class]]) return NO;
-  GPBField *field = (GPBField *)object;
+  if (![object isKindOfClass:[GPBUnknownField class]]) return NO;
+  GPBUnknownField *field = (GPBUnknownField *)object;
   BOOL equalVarint =
       (mutableVarintList_.count == 0 && field->mutableVarintList_.count == 0) ||
       [mutableVarintList_ isEqual:field->mutableVarintList_];
@@ -131,23 +129,23 @@
 - (void)writeToOutput:(GPBCodedOutputStream *)output {
   NSUInteger count = mutableVarintList_.count;
   if (count > 0) {
-    [output writeUInt64s:number_ values:mutableVarintList_ tag:0];
+    [output writeUInt64Array:number_ values:mutableVarintList_ tag:0];
   }
   count = mutableFixed32List_.count;
   if (count > 0) {
-    [output writeFixed32s:number_ values:mutableFixed32List_ tag:0];
+    [output writeFixed32Array:number_ values:mutableFixed32List_ tag:0];
   }
   count = mutableFixed64List_.count;
   if (count > 0) {
-    [output writeFixed64s:number_ values:mutableFixed64List_ tag:0];
+    [output writeFixed64Array:number_ values:mutableFixed64List_ tag:0];
   }
   count = mutableLengthDelimitedList_.count;
   if (count > 0) {
-    [output writeDatas:number_ values:mutableLengthDelimitedList_];
+    [output writeBytesArray:number_ values:mutableLengthDelimitedList_];
   }
   count = mutableGroupList_.count;
   if (count > 0) {
-    [output writeUnknownGroups:number_ values:mutableGroupList_];
+    [output writeUnknownGroupArray:number_ values:mutableGroupList_];
   }
 }
 
@@ -173,7 +171,7 @@
       }];
 
   for (NSData *data in mutableLengthDelimitedList_) {
-    result += GPBComputeDataSize(number, data);
+    result += GPBComputeBytesSize(number, data);
   }
 
   for (GPBUnknownFieldSet *set in mutableGroupList_) {
@@ -229,7 +227,7 @@
   return description;
 }
 
-- (void)mergeFromField:(GPBField *)other {
+- (void)mergeFromField:(GPBUnknownField *)other {
   GPBUInt64Array *otherVarintList = other.varintList;
   if (otherVarintList.count > 0) {
     if (mutableVarintList_ == nil) {

objectivec/GPBUnknownFieldSet.h

@@ -30,15 +30,15 @@
 
 #import <Foundation/Foundation.h>
 
-@class GPBField;
+@class GPBUnknownField;
 
 @interface GPBUnknownFieldSet : NSObject<NSCopying>
 
 - (BOOL)hasField:(int32_t)number;
-- (GPBField *)getField:(int32_t)number;
+- (GPBUnknownField *)getField:(int32_t)number;
 - (NSUInteger)countOfFields;
 
-- (void)addField:(GPBField *)field;
+- (void)addField:(GPBUnknownField *)field;
 
 // Returns an NSArray of the GPBFields sorted by the field numbers.
 - (NSArray *)sortedFields;

objectivec/GPBUnknownFieldSet.m

@@ -32,7 +32,7 @@
 
 #import "GPBCodedInputStream_PackagePrivate.h"
 #import "GPBCodedOutputStream.h"
-#import "GPBField_PackagePrivate.h"
+#import "GPBUnknownField_PackagePrivate.h"
 #import "GPBUtilities.h"
 #import "GPBWireFormat.h"
 
@@ -85,10 +85,10 @@ static void checkNumber(int32_t number) {
 
 static void CopyWorker(const void *key, const void *value, void *context) {
 #pragma unused(key)
-  GPBField *field = value;
+  GPBUnknownField *field = value;
   GPBUnknownFieldSet *result = context;
 
-  GPBField *copied = [field copy];
+  GPBUnknownField *copied = [field copy];
   [result addField:copied];
   [copied release];
 }
@@ -136,9 +136,10 @@ static void CopyWorker(const void *key, const void *value, void *context) {
   return fields_ ? (CFDictionaryGetValue(fields_, (void *)key) != nil) : NO;
 }
 
-- (GPBField *)getField:(int32_t)number {
+- (GPBUnknownField *)getField:(int32_t)number {
   ssize_t key = number;
-  GPBField *result = fields_ ? CFDictionaryGetValue(fields_, (void *)key) : nil;
+  GPBUnknownField *result =
+      fields_ ? CFDictionaryGetValue(fields_, (void *)key) : nil;
   return result;
 }
 
@@ -150,12 +151,12 @@ static void CopyWorker(const void *key, const void *value, void *context) {
   if (!fields_) return nil;
   size_t count = CFDictionaryGetCount(fields_);
   ssize_t keys[count];
-  GPBField *values[count];
+  GPBUnknownField *values[count];
   CFDictionaryGetKeysAndValues(fields_, (const void **)keys,
                                (const void **)values);
   struct GPBFieldPair {
     ssize_t key;
-    GPBField *value;
+    GPBUnknownField *value;
   } pairs[count];
   for (size_t i = 0; i < count; ++i) {
     pairs[i].key = keys[i];
@@ -179,13 +180,13 @@ static void CopyWorker(const void *key, const void *value, void *context) {
   if (!fields_) return;
   size_t count = CFDictionaryGetCount(fields_);
   ssize_t keys[count];
-  GPBField *values[count];
+  GPBUnknownField *values[count];
   CFDictionaryGetKeysAndValues(fields_, (const void **)keys,
                                (const void **)values);
   if (count > 1) {
     struct GPBFieldPair {
       ssize_t key;
-      GPBField *value;
+      GPBUnknownField *value;
     } pairs[count];
 
     for (size_t i = 0; i < count; ++i) {
@@ -199,7 +200,7 @@ static void CopyWorker(const void *key, const void *value, void *context) {
               return (a->key > b->key) ? 1 : ((a->key == b->key) ? 0 : -1);
             });
     for (size_t i = 0; i < count; ++i) {
-      GPBField *value = pairs[i].value;
+      GPBUnknownField *value = pairs[i].value;
       [value writeToOutput:output];
     }
   } else {
@@ -219,7 +220,7 @@ static void CopyWorker(const void *key, const void *value, void *context) {
 static void GPBUnknownFieldSetSerializedSize(const void *key, const void *value,
                                              void *context) {
 #pragma unused(key)
-  GPBField *field = value;
+  GPBUnknownField *field = value;
   size_t *result = context;
   *result += [field serializedSize];
 }
@@ -237,7 +238,7 @@ static void GPBUnknownFieldSetWriteAsMessageSetTo(const void *key,
                                                   const void *value,
                                                   void *context) {
 #pragma unused(key)
-  GPBField *field = value;
+  GPBUnknownField *field = value;
   GPBCodedOutputStream *output = context;
   [field writeAsMessageSetExtensionToOutput:output];
 }
@@ -253,7 +254,7 @@ static void GPBUnknownFieldSetSerializedSizeAsMessageSet(const void *key,
                                                          const void *value,
                                                          void *context) {
 #pragma unused(key)
-  GPBField *field = value;
+  GPBUnknownField *field = value;
   size_t *result = context;
   *result += [field serializedSizeAsMessageSetExtension];
 }
@@ -280,7 +281,7 @@ static void GPBUnknownFieldSetSerializedSizeAsMessageSet(const void *key,
   return GPBWireFormatGetTagWireType(tag) != GPBWireFormatEndGroup;
 }
 
-- (void)addField:(GPBField *)field {
+- (void)addField:(GPBUnknownField *)field {
   int32_t number = [field number];
   checkNumber(number);
   if (!fields_) {
@@ -297,12 +298,12 @@ static void GPBUnknownFieldSetSerializedSizeAsMessageSet(const void *key,
   CFDictionarySetValue(fields_, (const void *)key, field);
 }
 
-- (GPBField *)mutableFieldForNumber:(int32_t)number create:(BOOL)create {
+- (GPBUnknownField *)mutableFieldForNumber:(int32_t)number create:(BOOL)create {
   ssize_t key = number;
-  GPBField *existing =
+  GPBUnknownField *existing =
       fields_ ? CFDictionaryGetValue(fields_, (const void *)key) : nil;
   if (!existing && create) {
-    existing = [[GPBField alloc] initWithNumber:number];
+    existing = [[GPBUnknownField alloc] initWithNumber:number];
     // This retains existing.
     [self addField:existing];
     [existing release];
@@ -314,19 +315,19 @@ static void GPBUnknownFieldSetMergeUnknownFields(const void *key,
                                                  const void *value,
                                                  void *context) {
 #pragma unused(key)
-  GPBField *field = value;
+  GPBUnknownField *field = value;
   GPBUnknownFieldSet *self = context;
 
   int32_t number = [field number];
   checkNumber(number);
-  GPBField *oldField = [self mutableFieldForNumber:number create:NO];
+  GPBUnknownField *oldField = [self mutableFieldForNumber:number create:NO];
   if (oldField) {
     [oldField mergeFromField:field];
   } else {
     // Merge only comes from GPBMessage's mergeFrom:, so it means we are on
     // mutable message and are an mutable instance, so make sure we need
     // mutable fields.
-    GPBField *fieldCopy = [field copy];
+    GPBUnknownField *fieldCopy = [field copy];
     [self addField:fieldCopy];
     [fieldCopy release];
   }
@@ -356,18 +357,18 @@ static void GPBUnknownFieldSetMergeUnknownFields(const void *key,
   GPBCodedInputStreamState *state = &input->state_;
   switch (GPBWireFormatGetTagWireType(tag)) {
     case GPBWireFormatVarint: {
-      GPBField *field = [self mutableFieldForNumber:number create:YES];
+      GPBUnknownField *field = [self mutableFieldForNumber:number create:YES];
       [field addVarint:GPBCodedInputStreamReadInt64(state)];
       return YES;
     }
     case GPBWireFormatFixed64: {
-      GPBField *field = [self mutableFieldForNumber:number create:YES];
+      GPBUnknownField *field = [self mutableFieldForNumber:number create:YES];
       [field addFixed64:GPBCodedInputStreamReadFixed64(state)];
       return YES;
     }
     case GPBWireFormatLengthDelimited: {
-      NSData *data = GPBCodedInputStreamReadRetainedData(state);
-      GPBField *field = [self mutableFieldForNumber:number create:YES];
+      NSData *data = GPBCodedInputStreamReadRetainedBytes(state);
+      GPBUnknownField *field = [self mutableFieldForNumber:number create:YES];
       [field addLengthDelimited:data];
       [data release];
       return YES;
@@ -375,7 +376,7 @@ static void GPBUnknownFieldSetMergeUnknownFields(const void *key,
     case GPBWireFormatStartGroup: {
       GPBUnknownFieldSet *unknownFieldSet = [[GPBUnknownFieldSet alloc] init];
       [input readUnknownGroup:number message:unknownFieldSet];
-      GPBField *field = [self mutableFieldForNumber:number create:YES];
+      GPBUnknownField *field = [self mutableFieldForNumber:number create:YES];
       [field addGroup:unknownFieldSet];
       [unknownFieldSet release];
       return YES;
@@ -383,7 +384,7 @@ static void GPBUnknownFieldSetMergeUnknownFields(const void *key,
     case GPBWireFormatEndGroup:
       return NO;
     case GPBWireFormatFixed32: {
-      GPBField *field = [self mutableFieldForNumber:number create:YES];
+      GPBUnknownField *field = [self mutableFieldForNumber:number create:YES];
       [field addFixed32:GPBCodedInputStreamReadFixed32(state)];
       return YES;
     }
@@ -396,7 +397,7 @@ static void GPBUnknownFieldSetMergeUnknownFields(const void *key,
 }
 
 - (void)addUnknownMapEntry:(int32_t)fieldNum value:(NSData *)data {
-  GPBField *field = [self mutableFieldForNumber:fieldNum create:YES];
+  GPBUnknownField *field = [self mutableFieldForNumber:fieldNum create:YES];
   [field addLengthDelimited:data];
 }
 

objectivec/GPBField_PackagePrivate.h → objectivec/GPBUnknownField_PackagePrivate.h

@@ -30,11 +30,11 @@
 
 #import <Foundation/Foundation.h>
 
-#import "GPBField.h"
+#import "GPBUnknownField.h"
 
 @class GPBCodedOutputStream;
 
-@interface GPBField ()
+@interface GPBUnknownField ()
 
 - (instancetype)initWithNumber:(int32_t)number;
 
@@ -44,6 +44,6 @@
 - (void)writeAsMessageSetExtensionToOutput:(GPBCodedOutputStream *)output;
 - (size_t)serializedSizeAsMessageSetExtension;
 
-- (void)mergeFromField:(GPBField *)other;
+- (void)mergeFromField:(GPBUnknownField *)other;
 
 @end

objectivec/GPBUtilities_PackagePrivate.h

@@ -48,6 +48,15 @@
 
 CF_EXTERN_C_BEGIN
 
+// These two are used to inject a runtime check for version mismatch into the
+// generated sources to make sure they are linked with a supporting runtime.
+void GPBCheckRuntimeVersionInternal(int32_t version);
+GPB_INLINE void GPBDebugCheckRuntimeVersion() {
+#if DEBUG
+  GPBCheckRuntimeVersionInternal(GOOGLE_PROTOBUF_OBJC_GEN_VERSION);
+#endif
+}
+
 // Conversion functions for de/serializing floating point types.
 
 GPB_INLINE int64_t GPBConvertDoubleToInt64(double v) {
@@ -116,40 +125,38 @@ GPB_INLINE uint64_t GPBEncodeZigZag64(int64_t n) {
   return (n << 1) ^ (n >> 63);
 }
 
-GPB_INLINE BOOL GPBTypeIsObject(GPBType type) {
+GPB_INLINE BOOL GPBDataTypeIsObject(GPBDataType type) {
   switch (type) {
-    case GPBTypeData:
-    case GPBTypeString:
-    case GPBTypeMessage:
-    case GPBTypeGroup:
+    case GPBDataTypeBytes:
+    case GPBDataTypeString:
+    case GPBDataTypeMessage:
+    case GPBDataTypeGroup:
       return YES;
     default:
       return NO;
   }
 }
 
-GPB_INLINE BOOL GPBTypeIsMessage(GPBType type) {
+GPB_INLINE BOOL GPBDataTypeIsMessage(GPBDataType type) {
   switch (type) {
-    case GPBTypeMessage:
-    case GPBTypeGroup:
+    case GPBDataTypeMessage:
+    case GPBDataTypeGroup:
       return YES;
     default:
       return NO;
   }
 }
 
-GPB_INLINE BOOL GPBTypeIsEnum(GPBType type) { return type == GPBTypeEnum; }
-
-GPB_INLINE BOOL GPBFieldTypeIsMessage(GPBFieldDescriptor *field) {
-  return GPBTypeIsMessage(field->description_->type);
+GPB_INLINE BOOL GPBFieldDataTypeIsMessage(GPBFieldDescriptor *field) {
+  return GPBDataTypeIsMessage(field->description_->dataType);
 }
 
-GPB_INLINE BOOL GPBFieldTypeIsObject(GPBFieldDescriptor *field) {
-  return GPBTypeIsObject(field->description_->type);
+GPB_INLINE BOOL GPBFieldDataTypeIsObject(GPBFieldDescriptor *field) {
+  return GPBDataTypeIsObject(field->description_->dataType);
 }
 
 GPB_INLINE BOOL GPBExtensionIsMessage(GPBExtensionDescriptor *ext) {
-  return GPBTypeIsMessage(ext->description_->type);
+  return GPBDataTypeIsMessage(ext->description_->dataType);
 }
 
 // The field is an array/map or it has an object value.
@@ -158,7 +165,7 @@ GPB_INLINE BOOL GPBFieldStoresObject(GPBFieldDescriptor *field) {
   if ((desc->flags & (GPBFieldRepeated | GPBFieldMapKeyMask)) != 0) {
     return YES;
   }
-  return GPBTypeIsObject(desc->type);
+  return GPBDataTypeIsObject(desc->dataType);
 }
 
 BOOL GPBGetHasIvar(GPBMessage *self, int32_t index, uint32_t fieldNumber);
@@ -272,109 +279,6 @@ void GPBSetAutocreatedRetainedObjectIvarWithField(
 void GPBClearAutocreatedMessageIvarWithField(GPBMessage *self,
                                              GPBFieldDescriptor *field);
 
-// Utilities for applying various functions based on Objective C types.
-
-// A basic functor that is passed a field and a context. Returns YES
-// if the calling function should continue processing, and NO if the calling
-// function should stop processing.
-typedef BOOL (*GPBApplyFunction)(GPBFieldDescriptor *field, void *context);
-
-// Functions called for various types. See ApplyFunctionsToMessageFields.
-typedef enum {
-  GPBApplyFunctionObject,
-  GPBApplyFunctionBool,
-  GPBApplyFunctionInt32,
-  GPBApplyFunctionUInt32,
-  GPBApplyFunctionInt64,
-  GPBApplyFunctionUInt64,
-  GPBApplyFunctionFloat,
-  GPBApplyFunctionDouble,
-} GPBApplyFunctionOrder;
-
-enum {
-  // A count of the number of types in GPBApplyFunctionOrder. Separated out
-  // from the GPBApplyFunctionOrder enum to avoid warnings regarding not
-  // handling GPBApplyFunctionCount in switch statements.
-  GPBApplyFunctionCount = GPBApplyFunctionDouble + 1
-};
-
-typedef GPBApplyFunction GPBApplyFunctions[GPBApplyFunctionCount];
-
-// Functions called for various types.
-// See ApplyStrictFunctionsToMessageFields.
-// They are in the same order as the GPBTypes enum.
-typedef GPBApplyFunction GPBApplyStrictFunctions[GPBTypeCount];
-
-// A macro for easily initializing a GPBApplyFunctions struct
-// GPBApplyFunctions foo = GPBAPPLY_FUNCTIONS_INIT(Foo);
-#define GPBAPPLY_FUNCTIONS_INIT(PREFIX) \
-  { \
-    PREFIX##Object,  \
-    PREFIX##Bool,    \
-    PREFIX##Int32,   \
-    PREFIX##UInt32,  \
-    PREFIX##Int64,   \
-    PREFIX##UInt64,  \
-    PREFIX##Float,   \
-    PREFIX##Double,  \
-  }
-
-// A macro for easily initializing a GPBApplyStrictFunctions struct
-// GPBApplyStrictFunctions foo = GPBAPPLY_STRICT_FUNCTIONS_INIT(Foo);
-// These need to stay in the same order as
-// the GPBType enum.
-#define GPBAPPLY_STRICT_FUNCTIONS_INIT(PREFIX) \
-  { \
-    PREFIX##Bool,     \
-    PREFIX##Fixed32,  \
-    PREFIX##SFixed32, \
-    PREFIX##Float,    \
-    PREFIX##Fixed64,  \
-    PREFIX##SFixed64, \
-    PREFIX##Double,   \
-    PREFIX##Int32,    \
-    PREFIX##Int64,    \
-    PREFIX##SInt32,   \
-    PREFIX##SInt64,   \
-    PREFIX##UInt32,   \
-    PREFIX##UInt64,   \
-    PREFIX##Data,     \
-    PREFIX##String,   \
-    PREFIX##Message,  \
-    PREFIX##Group,    \
-    PREFIX##Enum,     \
-}
-
-// Iterates over the fields of a proto |msg| and applies the functions in
-// |functions| to them with |context|. If one of the functions in |functions|
-// returns NO, it will return immediately and not process the rest of the
-// ivars. The types in the fields are mapped so:
-// Int32, Enum, SInt32 and SFixed32 will be mapped to the int32Function,
-// UInt32 and Fixed32 will be mapped to the uint32Function,
-// Bytes, String, Message and Group will be mapped to the objectFunction,
-// etc..
-// If you require more specific mappings look at
-// GPBApplyStrictFunctionsToMessageFields.
-void GPBApplyFunctionsToMessageFields(GPBApplyFunctions *functions,
-                                      GPBMessage *msg, void *context);
-
-// Iterates over the fields of a proto |msg| and applies the functions in
-// |functions| to them with |context|. If one of the functions in |functions|
-// returns NO, it will return immediately and not process the rest of the
-// ivars. The types in the fields are mapped directly:
-// Int32 -> functions[GPBTypeInt32],
-// SFixed32 -> functions[GPBTypeSFixed32],
-// etc...
-// If you can use looser mappings look at GPBApplyFunctionsToMessageFields.
-void GPBApplyStrictFunctionsToMessageFields(GPBApplyStrictFunctions *functions,
-                                            GPBMessage *msg, void *context);
-
-// Applies the appropriate function in |functions| based on |field|.
-// Returns the value from function(name, context).
-// Throws an exception if the type is unrecognized.
-BOOL GPBApplyFunctionsBasedOnField(GPBFieldDescriptor *field,
-                                   GPBApplyFunctions *functions, void *context);
-
 // Returns an Objective C encoding for |selector|. |instanceSel| should be
 // YES if it's an instance selector (as opposed to a class selector).
 // |selector| must be a selector from MessageSignatureProtocol.
@@ -410,7 +314,7 @@ GPB_MESSAGE_SIGNATURE_ENTRY(int32_t, SInt32)
 GPB_MESSAGE_SIGNATURE_ENTRY(int64_t, SInt64)
 GPB_MESSAGE_SIGNATURE_ENTRY(uint32_t, UInt32)
 GPB_MESSAGE_SIGNATURE_ENTRY(uint64_t, UInt64)
-GPB_MESSAGE_SIGNATURE_ENTRY(NSData *, Data)
+GPB_MESSAGE_SIGNATURE_ENTRY(NSData *, Bytes)
 GPB_MESSAGE_SIGNATURE_ENTRY(NSString *, String)
 GPB_MESSAGE_SIGNATURE_ENTRY(GPBMessage *, Message)
 GPB_MESSAGE_SIGNATURE_ENTRY(GPBMessage *, Group)
@@ -419,6 +323,7 @@ GPB_MESSAGE_SIGNATURE_ENTRY(int32_t, Enum)
 #undef GPB_MESSAGE_SIGNATURE_ENTRY
 
 - (id)getArray;
+- (NSUInteger)getArrayCount;
 - (void)setArray:(NSArray *)array;
 + (id)getClassValue;
 @end

objectivec/GPBWireFormat.h

@@ -28,7 +28,7 @@
 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
-#import "GPBTypes.h"
+#import "GPBRuntimeTypes.h"
 
 CF_EXTERN_C_BEGIN
 
@@ -52,7 +52,7 @@ uint32_t GPBWireFormatMakeTag(uint32_t fieldNumber, GPBWireFormat wireType)
 GPBWireFormat GPBWireFormatGetTagWireType(uint32_t tag) __attribute__((const));
 uint32_t GPBWireFormatGetTagFieldNumber(uint32_t tag) __attribute__((const));
 
-GPBWireFormat GPBWireFormatForType(GPBType type, BOOL isPacked)
+GPBWireFormat GPBWireFormatForType(GPBDataType dataType, BOOL isPacked)
     __attribute__((const));
 
 #define GPBWireFormatMessageSetItemTag \

objectivec/GPBWireFormat.m

@@ -49,30 +49,30 @@ uint32_t GPBWireFormatGetTagFieldNumber(uint32_t tag) {
   return GPBLogicalRightShift32(tag, GPBWireFormatTagTypeBits);
 }
 
-GPBWireFormat GPBWireFormatForType(GPBType type, BOOL isPacked) {
+GPBWireFormat GPBWireFormatForType(GPBDataType type, BOOL isPacked) {
   if (isPacked) {
     return GPBWireFormatLengthDelimited;
   }
 
-  static const GPBWireFormat format[GPBTypeCount] = {
-      GPBWireFormatVarint,           // GPBTypeBool
-      GPBWireFormatFixed32,          // GPBTypeFixed32
-      GPBWireFormatFixed32,          // GPBTypeSFixed32
-      GPBWireFormatFixed32,          // GPBTypeFloat
-      GPBWireFormatFixed64,          // GPBTypeFixed64
-      GPBWireFormatFixed64,          // GPBTypeSFixed64
-      GPBWireFormatFixed64,          // GPBTypeDouble
-      GPBWireFormatVarint,           // GPBTypeInt32
-      GPBWireFormatVarint,           // GPBTypeInt64
-      GPBWireFormatVarint,           // GPBTypeSInt32
-      GPBWireFormatVarint,           // GPBTypeSInt64
-      GPBWireFormatVarint,           // GPBTypeUInt32
-      GPBWireFormatVarint,           // GPBTypeUInt64
-      GPBWireFormatLengthDelimited,  // GPBTypeBytes
-      GPBWireFormatLengthDelimited,  // GPBTypeString
-      GPBWireFormatLengthDelimited,  // GPBTypeMessage
-      GPBWireFormatStartGroup,       // GPBTypeGroup
-      GPBWireFormatVarint            // GPBTypeEnum
+  static const GPBWireFormat format[GPBDataType_Count] = {
+      GPBWireFormatVarint,           // GPBDataTypeBool
+      GPBWireFormatFixed32,          // GPBDataTypeFixed32
+      GPBWireFormatFixed32,          // GPBDataTypeSFixed32
+      GPBWireFormatFixed32,          // GPBDataTypeFloat
+      GPBWireFormatFixed64,          // GPBDataTypeFixed64
+      GPBWireFormatFixed64,          // GPBDataTypeSFixed64
+      GPBWireFormatFixed64,          // GPBDataTypeDouble
+      GPBWireFormatVarint,           // GPBDataTypeInt32
+      GPBWireFormatVarint,           // GPBDataTypeInt64
+      GPBWireFormatVarint,           // GPBDataTypeSInt32
+      GPBWireFormatVarint,           // GPBDataTypeSInt64
+      GPBWireFormatVarint,           // GPBDataTypeUInt32
+      GPBWireFormatVarint,           // GPBDataTypeUInt64
+      GPBWireFormatLengthDelimited,  // GPBDataTypeBytes
+      GPBWireFormatLengthDelimited,  // GPBDataTypeString
+      GPBWireFormatLengthDelimited,  // GPBDataTypeMessage
+      GPBWireFormatStartGroup,       // GPBDataTypeGroup
+      GPBWireFormatVarint            // GPBDataTypeEnum
   };
   return format[type];
 }

objectivec/ProtocolBuffers_OSX.xcodeproj/xcshareddata/xcschemes/ProtocolBuffers.xcscheme

 <?xml version="1.0" encoding="UTF-8"?>
 <Scheme
-   LastUpgradeVersion = "0620"
+   LastUpgradeVersion = "0630"
    version = "1.3">
    <BuildAction
       parallelizeBuildables = "YES"

objectivec/ProtocolBuffers_iOS.xcodeproj/xcshareddata/xcschemes/ProtocolBuffers.xcscheme

 <?xml version="1.0" encoding="UTF-8"?>
 <Scheme
-   LastUpgradeVersion = "0610"
+   LastUpgradeVersion = "0630"
    version = "1.3">
    <BuildAction
       parallelizeBuildables = "YES"

objectivec/README.md

@@ -21,15 +21,15 @@ Installation
 ------------
 
 The full distribution pulled from github includes the sources for both the
-compiler (protoc) and the runtime (this directory).  To build the compiler
+compiler (protoc) and the runtime (this directory). To build the compiler
 and run the runtime tests, you can use:
 
      $ objectivec/DevTools/full_mac_build.sh
 
 This will generate the `src/protoc` binary.
 
-Usage
------
+Building
+--------
 
 There are two ways to include the Runtime sources in your project:
 
@@ -47,6 +47,80 @@ If the target is using ARC, remember to turn off ARC (`-fno-objc-arc`) for the
 The files generated by `protoc` for the `*.proto` files (`\*.pbobjc.h' and
 `\*.pbobjc.m`) are then also added to the target.
 
+Usage
+-----
+
+The objects generated for messages should work like any other Objective C
+object. They are mutable objects, but if you don't change them, they are safe
+to share between threads (similar to passing an NSMutableDictionary between
+threads/queues; as long as no one mutates it, things are fine).
+
+There are a few behaviors worth calling out:
+
+A property that is type NSString\* will never return nil. If the value is
+unset, it will return an empty string (@""). This is inpart to align things
+with the Protocol Buffers spec which says the default for strings is an empty
+string, but also so you can always safely pass them to isEqual:/compare:, etc.
+and have deterministic results.
+
+A property that is type NSData\* also won't return nil, it will return an empty
+data ([NSData data]). The reasoning is the same as for NSString not returning
+nil.
+
+A property that is another GPBMessage class also will not return nil. If the
+field wasn't already set, you will get a instance of the correct class. This
+instance will be a temporary instance unless you mutate it, at which point it
+will be attached to its parent object. We call this pattern *autocreators*.
+Similar to NSString and NSData properties it makes things a little safer when
+using them with isEqual:/etc.; but more importantly, this allows you to write
+code that uses Objective C's property dot notation to walk into nested objects
+and access and/or assign things without having to check that they are not nil
+and create them each step along the way. You can write this:
+
+```
+- (void)updateRecord:(MyMessage *)msg {
+  ...
+  // Note: You don't have to check subMessage and otherMessage for nil and
+  // alloc/init/assign them back along the way.
+  msg.subMessage.otherMessage.lastName = @"Smith";
+  ...
+}
+```
+
+If you want to check if a GPBMessage property is present, there is always as
+`has\[NAME\]` property to go with the main property to check if it is set.
+
+A property that is of an Array or Dictionary type also provides *autocreator*
+behavior and will never return nil. This provides all the same benefits you
+see for the message properties. Again, you can write:
+
+```
+- (void)updateRecord:(MyMessage *)msg {
+  ...
+  // Note: Just like above, you don't have to check subMessage and otherMessage
+  // for nil and alloc/init/assign them back along the way. You also don't have
+  // to create the siblingsArray, you can safely just append to it.
+  [msg.subMessage.otherMessage.siblingsArray addObject:@"Pat"];
+  ...
+}
+```
+
+If you are inspecting a message you got from some other place (server, disk,
+etc), you may want to check if the Array or Dictionary has entries without
+causing it to be created for you. For this, there is always a `\[NAME\]_Count`
+property also provided that can return zero or the real count, but won't trigger
+the creation.
+
+For primitive type fields (ints, floats, bools, enum) in messages defined in a
+`.proto` file that use *proto2* syntax there are conceptual differences between
+having an *explicit* and *default* value. You can always get the value of the
+property. In the case that it hasn't been set you will get the default. In
+cases where you need to know whether it was set explicitly or you are just
+getting the default, you can use the `has\[NAME\]` property. If the value has
+been set, and you want to clear it, you can set the `has\[NAME\]` to `NO`.
+*proto3* syntax messages do away with this concept, thus the default values are
+never included when the message is encoded.
+
 The Objective C classes/enums can be used from Swift code.
 
 Objective C Generator Options
@@ -55,18 +129,19 @@ Objective C Generator Options
 **objc_class_prefix=\<prefix\>** (no default)
 
 Since Objective C uses a global namespace for all of its classes, there can
-be collisions.  This option provides a prefix that will be added to the Enums
-and Objects (for messages) generated from the proto.  Convention is to base
+be collisions. This option provides a prefix that will be added to the Enums
+and Objects (for messages) generated from the proto. Convention is to base
 the prefix on the package the proto is in.
 
 Contributing
 ------------
 
 Please make updates to the tests along with changes. If just changing the
-runtime, the Xcode projects can be used to build and run tests.  If change also
-require changes to the generated code, `objectivec/DevTools/full_mac_build.sh`
-can be used to easily rebuild and test changes. Passing `-h` to the script will
-show the addition options that could be useful.
+runtime, the Xcode projects can be used to build and run tests. If your change
+also requires changes to the generated code,
+`objectivec/DevTools/full_mac_build.sh` can be used to easily rebuild and test
+changes. Passing `-h` to the script will show the addition options that could
+be useful.
 
 Documentation
 -------------

objectivec/Tests/Filter2.txt

-// Protocol Buffers - Google's data interchange format
-// Copyright 2014 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.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-
-// Test the filter system for the ObjC Protocol Buffer Compiler to test
-// multiple filter support.
-
-Other

objectivec/Tests/GPBARCUnittestProtos.m

@@ -41,16 +41,15 @@
 #import "google/protobuf/UnittestEmbedOptimizeFor.pbobjc.h"
 #import "google/protobuf/UnittestEmpty.pbobjc.h"
 #import "google/protobuf/UnittestEnormousDescriptor.pbobjc.h"
-#import "google/protobuf/UnittestFilter.pbobjc.h"
 #import "google/protobuf/UnittestImport.pbobjc.h"
 #import "google/protobuf/UnittestImportLite.pbobjc.h"
 #import "google/protobuf/UnittestImportPublic.pbobjc.h"
 #import "google/protobuf/UnittestImportPublicLite.pbobjc.h"
 #import "google/protobuf/UnittestLite.pbobjc.h"
 #import "google/protobuf/UnittestMset.pbobjc.h"
-#import "google/protobuf/UnittestNameMangling.pbobjc.h"
 #import "google/protobuf/UnittestNoGenericServices.pbobjc.h"
 #import "google/protobuf/UnittestObjc.pbobjc.h"
+#import "google/protobuf/UnittestObjcStartup.pbobjc.h"
 #import "google/protobuf/UnittestOptimizeFor.pbobjc.h"
 #import "google/protobuf/UnittestPreserveUnknownEnum.pbobjc.h"
 #import "google/protobuf/UnittestRuntimeProto2.pbobjc.h"

objectivec/Tests/GPBCodedInputStreamTests.m

@@ -260,7 +260,7 @@
       [GPBCodedInputStream streamWithData:[NSMutableData dataWithData:data]];
   XCTAssertEqual(tag, [input readTag]);
 
-  XCTAssertThrows([input readData]);
+  XCTAssertThrows([input readBytes]);
 }
 
 // Verifies fix for b/10315336.

objectivec/Tests/GPBConcurrencyTests.m

@@ -196,7 +196,8 @@ static const int kNumMessages = 100;
   NSArray *threads = [self createThreadsWithSelector:sel object:messages];
   [self startThreads:threads];
   [self joinThreads:threads];
-  GPBExtensionField *extension = [UnittestRoot optionalForeignMessageExtension];
+  GPBExtensionDescriptor *extension =
+      [UnittestRoot optionalForeignMessageExtension];
   for (TestAllExtensions *message in messages) {
     XCTAssertFalse([message hasExtension:extension]);
   }

objectivec/Tests/GPBTestUtilities.h

@@ -35,6 +35,8 @@
 @class TestMap;
 @class TestPackedTypes;
 @class TestPackedExtensions;
+@class TestUnpackedTypes;
+@class TestUnpackedExtensions;
 @class GPBExtensionRegistry;
 
 
@@ -55,8 +57,12 @@ extern const uint32_t kGPBDefaultRepeatCount;
            repeatedCount:(uint32_t)count;
 - (void)setPackedFields:(TestPackedTypes *)message
           repeatedCount:(uint32_t)count;
+- (void)setUnpackedFields:(TestUnpackedTypes *)message
+            repeatedCount:(uint32_t)count;
 - (void)setPackedExtensions:(TestPackedExtensions *)message
               repeatedCount:(uint32_t)count;
+- (void)setUnpackedExtensions:(TestUnpackedExtensions *)message
+              repeatedCount:(uint32_t)count;
 - (void)setAllMapFields:(TestMap *)message numEntries:(uint32_t)count;
 
 - (TestAllTypes *)allSetRepeatedCount:(uint32_t)count;

objectivec/google/protobuf/FieldMask.pbobjc.h

@@ -152,6 +152,7 @@ typedef GPB_ENUM(GPBFieldMask_FieldNumber) {
 // The set of field mask paths.
 // |pathsArray| contains |NSString|
 @property(nonatomic, readwrite, strong) NSMutableArray *pathsArray;
+@property(nonatomic, readonly) NSUInteger pathsArray_Count;
 
 @end