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Go support for Google's protocol buffers
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Joe Tsai ce496b5d4d proto: add MergeOptions.Shallow option 
A shallow copy of a message is a common operation with over 10k
usages inside Google. However, the semantics of a shallow copy
on the struct is ill-defined and not officially supported by
the generated protobuf API.

To reduce improper usages, add an official implementation of
shallow merging that does something similar where messages, lists,
and maps are shallow copied into the destination if it does not
already have one populated.

In the common case where the destination is empty, this equivalent to:
	src.Range(func(fd protoreflect.FieldDescriptor, v protoreflect.Value) bool {
		dst.Set(fd, v)
	})
	if len(src.GetUnknown()) > 0 {
		dst.SetUnknown(src.GetUnknown())
	}
which is as simple of a shallow copy definition as you can get.

A future CL will add a fast-path implementation of both
deep and shallow merges.

Change-Id: Ic4a5503dd1b11b505738f5e503f97d55997e9418
Reviewed-on: https://go-review.googlesource.com/c/protobuf/+/213131
Reviewed-by: Damien Neil <dneil@google.com>
2020-01-06 20:26:20 +00:00
benchmarks benchmarks: move download_benchdata.bash into benchmarks/ dir 2019-07-09 22:36:27 +00:00
cmd cmd/protoc-gen-go: remove json ignore tags 2019-12-10 23:22:16 +00:00
compiler/protogen reflect/protoregistry: add (*Types).Register{Message,Enum,Extension} 2019-10-31 16:23:42 +00:00
encoding encoding/prototext: fix crash in map parsing 2019-12-25 06:02:31 +00:00
internal internal/impl: return nil for nil enum or message 2020-01-06 19:10:59 +00:00
proto proto: add MergeOptions.Shallow option 2020-01-06 20:26:20 +00:00
reflect internal/filedesc: use jsonName.Init method over JSONName constructor 2020-01-06 18:42:14 +00:00
runtime proto: reset message by default in Unmarshal 2019-09-17 21:13:42 +00:00
testing proto: distinguish between invalid and empty messages in Equal 2020-01-06 19:37:38 +00:00
types all: fix reflection behavior for empty lists and maps 2019-11-26 22:58:51 +00:00
.gitignore internal/fuzz: add basic fuzzing target for Marshal/Unmarshal 2019-10-11 16:00:11 +00:00
.travis.yml .travis.yml: configure for OSX 2019-03-13 18:04:08 +00:00
AUTHORS AUTHORS, CONTRIBUTORS, LICENSE, PATENTS: initial commit 2018-08-07 22:39:48 +00:00
CONTRIBUTING.md CONTRIBUTING.md: add pre-push hook instructions 2018-08-07 23:58:41 +00:00
CONTRIBUTORS AUTHORS, CONTRIBUTORS, LICENSE, PATENTS: initial commit 2018-08-07 22:39:48 +00:00
go.mod reflect/protoregistry: remove deprecated APIs 2019-11-08 01:03:52 +00:00
go.sum reflect/protoregistry: remove deprecated APIs 2019-11-08 01:03:52 +00:00
integration_test.go all: update to go1.13 release 2019-09-06 18:27:08 +00:00
LICENSE AUTHORS, CONTRIBUTORS, LICENSE, PATENTS: initial commit 2018-08-07 22:39:48 +00:00
PATENTS AUTHORS, CONTRIBUTORS, LICENSE, PATENTS: initial commit 2018-08-07 22:39:48 +00:00
README.md CONTRIBUTING.md: initial commit 2018-08-01 20:39:06 +00:00
regenerate.bash internal/cmd/generate-protos: generate test for testdata 2019-03-11 19:40:53 +00:00
release.bash release.bash: add support for building release binaries 2019-08-21 01:15:26 +00:00
test.bash test.bash: add -failfast flag 2019-08-05 21:48:09 +00:00

README.md

Next Generation Go Protocol Buffers

WARNING: This repository is in active development. There are no guarantees about API stability. Breaking changes will occur until a stable release is made and announced.

This repository is for the development of the next major Go implementation of protocol buffers. This library makes breaking API changes relative to the existing Go protobuf library. Of particular note, this API aims to make protobuf reflection a first-class feature of the API and implements the protobuf ecosystem in terms of reflection.

Design Documents

List of relevant design documents:

Contributing

We appreciate community contributions. See CONTRIBUTING.md.

Reporting Issues

Issues regarding the new API can be filed at github.com/golang/protobuf. Please use a APIv2: prefix in the title to make it clear that the issue is regarding the new API work.