tests/oneof_callback/oneof.proto

syntax = "proto3";

import 'nanopb.proto';

// Repeated callback inside submessage inside oneof
message SubMsg1
{
    repeated int32 array = 1;
}

// String callback inside submessage inside oneof
message SubMsg2
{
    string strvalue = 1;
}

// String callback directly inside oneof
message SubMsg3
{
    oneof values
    {
        int32 intvalue = 1;
        string strvalue = 2 [(nanopb).callback_datatype = "const char*"];
    }
}

message OneOfMessage
{
    option (nanopb_msgopt).submsg_callback = true;

    int32 prefix = 1;
    oneof values
    {
        int32 intvalue = 5;
        string strvalue = 6 [(nanopb).max_size = 8];
        SubMsg1 submsg1 = 7;
        SubMsg2 submsg2 = 8;
        SubMsg3 submsg3 = 9;
    }
    int32 suffix = 99;
}