Error/problem using constants! ("Expected top-level statement (e.g. "message")")

[Leonardo Toledo]

Hi! I am writing my "file.proto" and when i write a constant the compiler give an error called "Expected top-level statement (e.g. "message")" and i do not know why! In my "file.proto" i have the follow:

"message Test{

string str1 = 1;

DataType data = 2;

} 

DataType = DataOther | DataTest;"

This piece above of code is a part of what i have in my "file.proto" and i want define the variable "Datatype" as a constant that can be of 2 different types, being them, DataOther or DataTest. But when i am compiling, the compiler give me the error that i mencioned. Can anyone help me please, because i do not know how solve this problem!?

Thanks in advance and i am waiting for some answer, 

Leonardo Toledo

[Adam Cozzette]

The compiler doesn't support that syntax (DataType = DataOther | DataTest). Maybe a oneof field is what you are looking for; that would look something like this:

message DataType {

  oneof data_type {

    DataOther data_other = 1;

    DataTest data_test = 2;

  }

}

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