tree 0d0dde0cf859426c886167a75984664abeee12b6
parent 8eba9eee0ba9c2f9e9d2685798c0d87379f23592
author Damien Neil <dneil@google.com> 1555358713 -0700
committer Damien Neil <dneil@google.com> 1555394584 +0000

reflect/protoreflect, reflect/protoregistry: move descriptor lookup to registry

Drop the protoreflect.FileDescriptor.DescriptorByName method.
Descriptor lookup will always happen through a protoregistry.Files, which
is more generally useful (it's rare that you want to find a descriptor in a
specific file, as opposed to a package which may be composed of multiple files).

Split protoregistry.Files descriptor lookup into individual per-type functions
(enum, message, extension, service), matching the preg.Types API.

Drop the ability to look up enum values, message fields, and service methods
for now. This can be easily added later if needed, and is trivial to implement
in user code. (e.g., look up the service and then consult sd.Methods.ByName().)

Change-Id: I2b3d8ef888921a8464ba1434eddab20c7d3a458e
Reviewed-on: https://go-review.googlesource.com/c/protobuf/+/172118
Reviewed-by: Joe Tsai <thebrokentoaster@gmail.com>