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// This is an example of how to handle 'union' style messages
// with nanopb, without allocating memory for all the message types.
//
// There is no official type in Protocol Buffers for describing unions,
// but they are commonly implemented by filling out exactly one of
// several optional fields.
message MsgType1
{
required int32 value = 1;
}
message MsgType2
{
required bool value = 1;
}
message MsgType3
{
required int32 value1 = 1;
required int32 value2 = 2;
}
message UnionMessage
{
optional MsgType1 msg1 = 1;
optional MsgType2 msg2 = 2;
optional MsgType3 msg3 = 3;
}
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