Provide a protocol for GPBExtensionRegistry's lookup support.
This allows some to use an alternative registry if they have a different
implementation.
This is really just wiring though the change to use the GPBExtensionRegistry
protocol vs the concrete GPBExtensionRegistry through the other apis.
diff --git a/objectivec/GPBCodedInputStream_PackagePrivate.h b/objectivec/GPBCodedInputStream_PackagePrivate.h
index 43ec6e7..cdfb0dc 100644
--- a/objectivec/GPBCodedInputStream_PackagePrivate.h
+++ b/objectivec/GPBCodedInputStream_PackagePrivate.h
@@ -61,7 +61,7 @@
// support for older data.
- (void)readGroup:(int32_t)fieldNumber
message:(GPBMessage *)message
- extensionRegistry:(GPBExtensionRegistry *)extensionRegistry;
+ extensionRegistry:(id<GPBExtensionRegistry>)extensionRegistry;
// Reads a group field value from the stream and merges it into the given
// UnknownFieldSet.
@@ -70,7 +70,7 @@
// Reads a map entry.
- (void)readMapEntry:(id)mapDictionary
- extensionRegistry:(GPBExtensionRegistry *)extensionRegistry
+ extensionRegistry:(id<GPBExtensionRegistry>)extensionRegistry
field:(GPBFieldDescriptor *)field
parentMessage:(GPBMessage *)parentMessage;
@end
