tree 3f8c61b88b154332341fe6363d61ca1ac52d857b
parent 44000a1bea5e5eee0c7438110057617822b3850f
author Joe Tsai <joetsai@digital-static.net> 1540508953 -0700
committer Joe Tsai <thebrokentoaster@gmail.com> 1540509811 +0000

reflect/protoreflect: clarify Range semantics

Restrict mutation operations during Range to only the current iteration key.
This simplifies the guarantees that any given implementation may need to provide.

While none of the range operations have a defined order, UnknownFields.Range
is special in that the iteration order is at least deterministic.
This exception occurs because there is no obviously correct way to re-order them
(since order of unknown fields can have semantic significance).

Change-Id: I35145e500dbc7c87be7270f0d886ef52e13d07d8
Reviewed-on: https://go-review.googlesource.com/c/144700
Reviewed-by: Damien Neil <dneil@google.com>