First I tried this simple protobuf with compiler 3.3:
syntax = "proto3";
message ProxyMessage {
int32 Signal = 1;
oneof payload
{
repeated int32 a= 6;
repeated float b = 7;
}
}
while this seem quite simple it resulted in the following error:
protoc --csharp_out=. proxy.proto
proxy.proto:7:7: Fields in oneofs must not have labels (required / optional
/ repeated).
proxy.proto:8:7: Fields in oneofs must not have labels (required / optional
/ repeated).
Is there a workaround? Is this a known bug?
I know you can, in effect, do this same thing in proto3 by not using the
oneof and rely on "optional by default" feature.
The reason I need the oneof is the fact on the other end I am using C++ and
I need the oneof union feature to keep the buffer allocation down.
That being said I really need something like:
syntax = "proto3";
message A
{
repeated int32 Int32Parameters = 1;
}
message B
{
repeated float FloatParameters = 1;
}
message ProxyMessage {
int32 Signal = 1;
oneof payload
{
A a= 6;
B b = 7;
}
}
This actually compiles but when I try to construct a message by doing
something like this:
public MainPage()
{
this.InitializeComponent();
RepeatedField<int> myInts = new RepeatedField<int>();
myInts.Add(2);
myInts.Add(3);
ProxyMessage proxy = new ProxyMessage();
proxy.Signal = 5;
proxy.A.Int32Parameters.AddRange(myInts);
}
I get a NullReferenceException when it hits the AddRange line.
I also tried adding the line:
proxy.PayloadCase = ProxyMessage.PayloadOneofCase.A;
but this will not compile with "..can not assigned to --it is read only"
any ideas?
Dave
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