For oneofs, to get the case, we need to call the property that
returns the enum value. We really want it as an int, and modern
runtimes allow us to create a delegate which returns an int from the
method. (I suspect that the MS runtime has always allowed that.)
Old versions of Mono (e.g. used by Unity3d) don't allow that, so we
have to convert the enum value to an int via boxing. It's ugly, but
it should work.
This should work on Unity, Mono and .NET 3.5 as far as I'm aware.
It won't work on platforms where reflection itself is prohibited,
but that's a non-starter basically.
This will allow SourceLink as per #4179, and mean that we can use C#
7.0 language features in the library (but not in generated code).
This does not affect which platforms we're *targeting*, so end users
won't see any difference.
It would be nice to update to 2.1.4, but AppVeyor's "Visual Studio
2017" environment is only 2.0.3.
By default, unknown fields are preserved when parsing. To discard
them, use a parser configured to do so:
var parser = MyMessage.Parser.WithDiscardUnknownFields(true);
unittest_proto3 had been changed in a very backward-incompatible
way which was never going to work with C# as it imports proto2 messages.
This is now a copy of the old file, but with a package name change for
compatibility with the remaining files in src/google/protobuf.
The other moves are for files that are only used by C#.
If messages A and B have the same oneof case, which is a message
type, and we merge B into A, those sub-messages should be merged.
Fixes#3200.
Note that I haven't regenerated all the code, as some of the protos
have been changed, breaking generation.
Previously we only rejected the tag if the tag itself was 0, i.e.
field=0, type=varint. The type doesn't matter: field 0 is always
invalid.
This removes the last of the C# conformance failures.
