proto, internal/errors: add Error sentinel, errors.Wrap

Add a sentinel proto.Error error which matches all errors returned by
packages in this module.

Document that protoregistry.NotFound is an exact sentinel value for
performance reasons.

Add a Wrap function to the internal/errors package and use it to wrap
errors from outside sources (resolvers). Wrapped errors match
proto.Error.

Fixes golang/protobuf#1021.

Change-Id: I45567df3fd6c8dc9a5caafdb55654827f6fb1941
Reviewed-on: https://go-review.googlesource.com/c/protobuf/+/215338
Reviewed-by: Joe Tsai <joetsai@google.com>
11 files changed
tree: f6244579bba9e4d218f5f3b2067f3dc698da91a9
  1. .gitignore
  2. .travis.yml
  3. AUTHORS
  4. CONTRIBUTING.md
  5. CONTRIBUTORS
  6. LICENSE
  7. PATENTS
  8. README.md
  9. cmd/
  10. compiler/
  11. encoding/
  12. go.mod
  13. go.sum
  14. integration_test.go
  15. internal/
  16. proto/
  17. reflect/
  18. regenerate.bash
  19. release.bash
  20. runtime/
  21. test.bash
  22. testing/
  23. types/
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.