tree c3b6361bcaf2e627b0a0a37aa87f9b9a476471e0
parent b78321453d1f652e268ee47b55f0f4a0fc2ece92
author Joe Tsai <joetsai@digital-static.net> 1593034087 -0700
committer Joe Tsai <joetsai@digital-static.net> 1593629858 +0000

internal/order: add a package for ordered iteration over messages and maps

The order package replaces the mapsort and fieldsort packages.
It presents a common API for ordered iteration over message fields
and map fields.

It has a number of pre-defined orderings.

Change-Id: Ie6cd423da30b4757864c352cb04454f21fe07ee2
Reviewed-on: https://go-review.googlesource.com/c/protobuf/+/239837
Reviewed-by: Herbie Ong <herbie@google.com>